1. An emulsion pump fluid end comprising:

the valve comprises a valve body and a valve cavity, wherein the valve cavity is provided with a plurality of valve cavities, the valve cavities comprise a first mounting hole, a plunger cavity, a second mounting hole and a third mounting hole which are sequentially communicated along the height direction of the valve body, the diameters of the first mounting hole, the second mounting hole and the third mounting hole are sequentially increased, and one end of the first mounting hole, far away from the plunger cavity, is provided with an annular bulge;

the liquid suction valve seat is arranged in the first mounting hole, and one end of the liquid suction valve seat is abutted against the annular bulge;

the spacer bush is arranged in the plunger cavity, one end of the spacer bush is abutted against the other end of the liquid suction valve seat, the peripheral wall of the spacer bush is provided with a liquid through hole, and the liquid through hole is communicated with an inner cavity of the spacer bush and the plunger cavity;

the liquid discharge valve seat is arranged in the second mounting hole, and the other end of the spacer bush abuts against one end of the liquid discharge valve seat;

the valve stopper is arranged in the third mounting hole, and one end of the valve stopper is abutted against the other end of the liquid discharge valve seat; and

the liquid absorbing valve comprises a liquid absorbing valve core and a liquid discharging valve core, wherein one end of the liquid absorbing valve core is matched with one end of the liquid discharging valve core through a first reset spring, the other end of the liquid discharging valve core is matched with one end of the valve stopping device through a second reset spring, the liquid absorbing valve core can abut against the other end of the liquid absorbing valve seat, and the liquid discharging valve core can abut against the other end of the liquid discharging valve seat.

2. The emulsion pump fluid end of claim 1 wherein the valve body further has a first plunger hole and a second plunger hole, the first plunger hole being provided on one side of the valve body in the width direction, the second plunger hole being provided on the other side of the valve body in the width direction,

one end of the first plunger hole is a first connecting hole, the other end of the first plunger hole is communicated with the plunger cavity,

one end of the second plunger hole is a second connecting hole, and the other end of the second plunger hole is communicated with the plunger cavity;

the emulsion pump fluid end still includes:

the first compression nut is matched with the second connecting hole to block the second plug hole,

a packing assembly, one end of the packing assembly being fitted with the first connection hole to cover the first plunger hole, the packing assembly having a through hole, an

And part of the plunger assembly is positioned in the through hole, and the outer peripheral surface of the plunger assembly is in clearance fit with the wall surface of the through hole so as to facilitate the axial movement of the plunger assembly along the through hole.

3. The emulsion pump force end of claim 2, wherein the spacer has a positioning hole in a peripheral wall thereof, the positioning hole and the liquid through hole being disposed opposite to each other in a width direction of the valve body,

the fluid end of the emulsion pump also comprises a first positioning column, the first positioning column is arranged in the second plunger hole, at least part of the first positioning column is positioned between the first compression nut and the spacer bush,

part of the outer peripheral surface of the first positioning column is in contact with the wall surface of the other end of the second plunger hole, a first annular groove is formed in the part of the outer peripheral surface of the first positioning column, a first annular sealing element is arranged in the first annular groove,

one end of the first positioning column, which is adjacent to the spacer bush, is provided with a positioning bulge, and the positioning bulge extends into the positioning hole so as to circumferentially position the spacer bush.

4. The emulsion pump fluid end of claim 2 wherein the valve cavity further comprises a fluid intake port, the fluid intake port is in communication with the first mounting hole, the fluid intake port extends through one side of the valve body in the height direction, the third mounting hole extends through the other side of the valve body in the height direction, a fluid discharge hole is provided in a wall surface of the third mounting hole,

the emulsion pump fluid end still includes:

the water absorption box assembly is arranged on one side of the valve body and provided with a liquid absorption cavity, and the liquid absorption cavity is communicated with the liquid absorption port; and

the pressing plates are arranged on the other side of the valve body so as to cover the third mounting hole, and one side of each pressing plate, which is adjacent to the third mounting hole, abuts against the other end of the valve stopper.

5. The emulsion pump fluid power end of any one of claims 2-4 wherein the first plunger bore is a stepped bore, the end face of the one end of the packing assembly is in contact with a stepped surface of the stepped bore, the end face of the one end of the packing assembly is provided with a second annular groove, and a second annular seal is provided in the second annular groove.

6. The emulsion pump fluid end of any one of claims 2-4 wherein the suction valve seat has an outer peripheral surface that is in clearance fit with the wall surface of the first mounting hole, the outer peripheral surface of the suction valve seat is provided with a third annular groove, a third annular seal is provided in the third annular groove,

the peripheral face of flowing back disk seat with the wall clearance fit of second mounting hole, the peripheral face of flowing back disk seat is equipped with fourth annular recess, be equipped with fourth annular sealing member in the fourth annular recess.

7. The emulsion pump fluid end of any one of claims 2-4 wherein the valve stop comprises:

the base is positioned at the other end of the valve stopper, the peripheral surface of the base is in clearance fit with the wall surface of the third mounting hole, a fifth annular groove is formed in the peripheral surface of the base, and a fifth annular sealing element is arranged in the fifth annular groove;

the stop frame is arranged at one end of the valve stop device and provided with a movable groove, the other end of the liquid discharge valve core is positioned in the movable groove, a sixth annular groove is formed in the bottom wall surface of the movable groove, and one end of the second return spring is arranged in the sixth annular groove; and

a connecting rod connected between the base and the stopper frame.

8. The emulsion pump fluid end of any one of claims 2-4 wherein the packing assembly comprises:

the outer peripheral surface of one end of the connecting seat is provided with first threads, the outer peripheral surface of the other end of the connecting seat is provided with second threads, the one end of the connecting seat is in threaded fit with the first connecting hole, the inner peripheral surface of the connecting seat surrounds the through hole, the inner peripheral surface of the connecting seat is provided with an annular groove, and the second annular groove is formed in the end surface of the one end of the connecting seat;

the second compression nut is in threaded fit with the other end of the connecting seat and is provided with a central hole, the central hole is communicated with the annular groove, and the diameter of the central hole is smaller than that of the annular groove;

a guide ring including a first portion and a second portion, an outer diameter of the first portion being smaller than an outer diameter of the second portion, an outer circumferential surface of the first portion being in contact with a wall surface of the center hole, an outer circumferential surface of the second portion being in contact with a circumferential wall surface of the annular groove;

an anti-extrusion ring, an outer circumferential surface of which is in contact with a circumferential wall surface of the annular groove, one side of which is in contact with the guide ring;

the peripheral surface of the packing is in contact with the peripheral wall surface of the annular groove, and one side of the packing is in contact with the other side of the anti-extrusion ring;

the outer peripheral surface of the first gasket is in contact with the peripheral wall surface of the annular groove, and one side of the first gasket is in contact with the other side of the packing;

the outer peripheral surface of the second gasket is in contact with the peripheral wall surface of the annular groove, one side of the second gasket is in contact with the other side of the first gasket, the other side of the second gasket is in contact with the side wall surface of the annular groove, and an annular cavity is arranged inside the second gasket; and

and the packing spring is arranged in the annular cavity.

9. An emulsion pump, comprising:

a fluid end of the emulsion pump according to any one of claims 2 to 8;

the power end comprises a power shaft and a guide cylinder, and the outer peripheral surface of the power shaft is in clearance fit with the inner peripheral surface of the guide cylinder so that the power shaft can reciprocate along the axial direction of the guide cylinder; and

the crosshead, one end with the crosshead link to each other, the other end of crosshead with the power shaft links to each other.

10. The emulsion pump of claim 9, further comprising a seal cartridge assembly, the seal cartridge assembly comprising:

a seal carrier comprising a flange plate, a first annular boss and a second annular boss, the first annular boss being connected between the flange plate and the second annular boss,

wherein a radial dimension of an outer peripheral surface of the first annular boss is smaller than a radial dimension of an outer peripheral surface of the flange plate, a radial dimension of an outer peripheral surface of the second annular boss is smaller than a radial dimension of an outer peripheral surface of the first annular boss, a radial dimension of an inner peripheral surface of the first annular boss is smaller than a radial dimension of an inner peripheral surface of the flange plate, and a radial dimension of an inner peripheral surface of the second annular boss is smaller than a radial dimension of an inner peripheral surface of the first annular boss,

the flange plate is connected with the end face of one end of the guide cylinder, the outer peripheral surface of the first annular boss is in contact with the outer peripheral surface of the first part of the guide cylinder, the outer peripheral surface of the second annular boss is in contact with the inner peripheral surface of the second part of the guide cylinder, a seventh annular groove is formed in the outer peripheral surface of the second annular boss, a sixth annular sealing element is arranged in the seventh annular groove, and a sealing gasket is arranged on the end face, adjacent to the second annular boss, of the first annular boss;

the oil seal comprises an oil seal and a pressing ring, wherein the outer peripheral surface of the oil seal is in contact with the inner peripheral surface of the first annular boss, one side of the oil seal is in contact with the end surface, close to the first annular boss, of the second annular boss, the outer peripheral surface of the pressing ring is connected with the inner peripheral surface of the flange plate, and one side of the pressing ring is in contact with the other side of the oil seal.

Background

In the related art, the valve body of the emulsion pump is mostly designed in an integral and compact manner. Due to the structural limitation, before replacing the liquid suction valve core and the liquid suction valve seat, the liquid supply pipeline, the water suction box and the liquid suction valve seat positioning flange need to be removed, and the liquid suction valve has the advantages of complex maintenance, poor operability, long maintenance time and high cost.

In addition, the flowing back disk seat interference is installed on the valve body, needs cold charge or pressure equipment to realize when assembling the flowing back disk seat, must use specialized tool to draw during the dismantlement and just can accomplish, causes the strain easily to the valve body.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the embodiment of the invention provides the emulsion pump fluid end which is convenient to disassemble and assemble and simple to maintain, reduces the maintenance time and cost, and can reduce the damage to the valve body.

The embodiment of the invention provides an emulsion pump, the hydraulic end of which is convenient to disassemble and assemble and simple to maintain, the maintenance time and cost are reduced, and the damage to a valve body can be reduced.

The emulsion pump fluid end according to the embodiment of the invention comprises: the valve comprises a valve body and a valve cavity, wherein the valve cavity is provided with a plurality of valve cavities, the valve cavities comprise a first mounting hole, a plunger cavity, a second mounting hole and a third mounting hole which are sequentially communicated along the height direction of the valve body, the diameters of the first mounting hole, the second mounting hole and the third mounting hole are sequentially increased, and one end of the first mounting hole, far away from the plunger cavity, is provided with an annular bulge; the liquid suction valve seat is arranged in the first mounting hole, and one end of the liquid suction valve seat is abutted against the annular bulge; the spacer bush is arranged in the plunger cavity, one end of the spacer bush is abutted against the other end of the liquid suction valve seat, the peripheral wall of the spacer bush is provided with a liquid through hole, and the liquid through hole is communicated with an inner cavity of the spacer bush and the plunger cavity; the liquid discharge valve seat is arranged in the second mounting hole, and the other end of the spacer bush abuts against one end of the liquid discharge valve seat; the valve stopper is arranged in the third mounting hole, and one end of the valve stopper is abutted against the other end of the liquid discharge valve seat; one end of the liquid suction valve core is matched with one end of the liquid discharge valve core through a first reset spring, the other end of the liquid discharge valve core is matched with one end of the valve stopper through a second reset spring, the liquid suction valve core can abut against the other end of the liquid suction valve seat, and the liquid discharge valve core can abut against the other end of the liquid discharge valve seat.

According to the emulsion pump fluid end, the aperture of the first mounting hole is smaller than that of the second mounting hole, the aperture of the second mounting hole is smaller than that of the third mounting hole, the liquid suction valve seat, the liquid discharge valve seat and the valve stopper can be sequentially mounted and dismounted in a reversed order, and the packing assembly, the plunger assembly and other structural components do not need to be dismounted. In addition, the imbibition disk seat can not produce the contact with second mounting hole and third mounting hole during dismouting, can not produce the contact with the third mounting hole during the installation of flowing back disk seat, can reduce the damage of valve body.

In addition, when plunger chamber imbibition, the imbibition case removes, and the flowing back case can play limiting displacement, avoids imbibition pressure too big, plays irreversible damage to first reset spring.

Therefore, the emulsion pump provided by the embodiment of the invention has the advantages that the assembly and disassembly of the liquid end are convenient, the maintenance is simple, the maintenance time and cost are reduced, and the damage to the valve body can be reduced.

In some embodiments, the valve body further has a first plunger hole and a second plunger hole, the first plunger hole is arranged on one side of the valve body in the width direction, the second plunger hole is arranged on the other side of the valve body in the width direction, one end of the first plunger hole is a first connecting hole, the other end of the first plunger hole is communicated with the plunger cavity, one end of the second plunger hole is a second connecting hole, and the other end of the second plunger hole is communicated with the plunger cavity; the emulsion pump fluid end still includes: the packing assembly is provided with a through hole and a plunger assembly, part of the plunger assembly is positioned in the through hole, and the peripheral surface of the plunger assembly is in clearance fit with the wall surface of the through hole so that the plunger assembly can move along the axial direction of the through hole.

In some embodiments, the peripheral wall of the spacer sleeve is further provided with a positioning hole, the positioning hole and the liquid through hole are arranged oppositely along the width direction of the valve body,

the fluid end of the emulsion pump also comprises a first positioning column, the first positioning column is arranged in the second plunger hole, at least part of the first positioning column is positioned between the first compression nut and the spacer bush,

part of the outer peripheral surface of the first positioning column is in contact with the wall surface of the other end of the second plunger hole, a first annular groove is formed in the part of the outer peripheral surface of the first positioning column, a first annular sealing element is arranged in the first annular groove,

one end of the first positioning column, which is adjacent to the spacer bush, is provided with a positioning bulge, and the positioning bulge extends into the positioning hole so as to circumferentially position the spacer bush.

In some embodiments, the valve chamber further includes a liquid suction port, the liquid suction port communicates with the first mounting hole, the liquid suction port penetrates one side of the valve body in the height direction, the third mounting hole penetrates the other side of the valve body in the height direction, a liquid discharge hole is formed in a wall surface of the third mounting hole,

the emulsion pump fluid end still includes:

the water absorption box assembly is arranged on one side of the valve body and provided with a liquid absorption cavity, and the liquid absorption cavity is communicated with the liquid absorption port; and

the pressing plates are arranged on the other side of the valve body so as to cover the third mounting hole, and one side of each pressing plate, which is adjacent to the third mounting hole, abuts against the other end of the valve stopper.

In some embodiments, the first plunger hole is a stepped hole, the end surface of the one end of the packing assembly is in contact with a stepped surface of the stepped hole, the end surface of the one end of the packing assembly is provided with a second annular groove, and a second annular seal is arranged in the second annular groove.

In some embodiments, the outer peripheral surface of the liquid suction valve seat is in clearance fit with the wall surface of the first mounting hole, the outer peripheral surface of the liquid suction valve seat is provided with a third annular groove, a third annular sealing element is arranged in the third annular groove,

the peripheral face of flowing back disk seat with the wall clearance fit of second mounting hole, the peripheral face of flowing back disk seat is equipped with fourth annular recess, be equipped with fourth annular sealing member in the fourth annular recess.

In some embodiments, the valve stopper comprises:

the base is positioned at the other end of the valve stopper, the peripheral surface of the base is in clearance fit with the wall surface of the third mounting hole, a fifth annular groove is formed in the peripheral surface of the base, and a fifth annular sealing element is arranged in the fifth annular groove;

the stop frame is arranged at one end of the valve stop device and provided with a movable groove, the other end of the liquid discharge valve core is positioned in the movable groove, a sixth annular groove is formed in the bottom wall surface of the movable groove, and one end of the second return spring is arranged in the sixth annular groove; and

a connecting rod connected between the base and the stopper frame.

In some embodiments, the packing assembly includes:

the outer peripheral surface of one end of the connecting seat is provided with first threads, the outer peripheral surface of the other end of the connecting seat is provided with second threads, the one end of the connecting seat is in threaded fit with the first connecting hole, the inner peripheral surface of the connecting seat surrounds the through hole, the inner peripheral surface of the connecting seat is provided with an annular groove, and the second annular groove is formed in the end surface of the one end of the connecting seat;

the second compression nut is in threaded fit with the other end of the connecting seat and is provided with a central hole, the central hole is communicated with the annular groove, and the diameter of the central hole is smaller than that of the annular groove;

a guide ring including a first portion and a second portion, an outer diameter of the first portion being smaller than an outer diameter of the second portion, an outer circumferential surface of the first portion being in contact with a wall surface of the center hole, an outer circumferential surface of the second portion being in contact with a circumferential wall surface of the annular groove;

an anti-extrusion ring, an outer circumferential surface of which is in contact with a circumferential wall surface of the annular groove, one side of which is in contact with the guide ring;

the peripheral surface of the packing is in contact with the peripheral wall surface of the annular groove, and one side of the packing is in contact with the other side of the anti-extrusion ring;

the outer peripheral surface of the first gasket is in contact with the peripheral wall surface of the annular groove, and one side of the first gasket is in contact with the other side of the packing;

the outer peripheral surface of the second gasket is in contact with the peripheral wall surface of the annular groove, one side of the second gasket is in contact with the other side of the first gasket, the other side of the second gasket is in contact with the side wall surface of the annular groove, and an annular cavity is arranged inside the second gasket; and

and the packing spring is arranged in the annular cavity.

An emulsion pump according to an embodiment of the present invention includes:

a fluid end, the fluid end being the emulsion pump fluid end according to any of the embodiments described above;

the power end comprises a power shaft and a guide cylinder, and the outer peripheral surface of the power shaft is in clearance fit with the inner peripheral surface of the guide cylinder so that the power shaft can reciprocate along the axial direction of the guide cylinder; and

the crosshead, one end with the crosshead link to each other, the other end of crosshead with the power shaft links to each other.

In some embodiments, the emulsion pump further comprises a seal cartridge assembly comprising:

a seal carrier comprising a flange plate, a first annular boss and a second annular boss, the first annular boss being connected between the flange plate and the second annular boss,

wherein a radial dimension of an outer peripheral surface of the first annular boss is smaller than a radial dimension of an outer peripheral surface of the flange plate, a radial dimension of an outer peripheral surface of the second annular boss is smaller than a radial dimension of an outer peripheral surface of the first annular boss, a radial dimension of an inner peripheral surface of the first annular boss is smaller than a radial dimension of an inner peripheral surface of the flange plate, and a radial dimension of an inner peripheral surface of the second annular boss is smaller than a radial dimension of an inner peripheral surface of the first annular boss,

the flange plate is connected with the end face of one end of the guide cylinder, the outer peripheral surface of the first annular boss is in contact with the outer peripheral surface of the first part of the guide cylinder, the outer peripheral surface of the second annular boss is in contact with the inner peripheral surface of the second part of the guide cylinder, a seventh annular groove is formed in the outer peripheral surface of the second annular boss, a sixth annular sealing element is arranged in the seventh annular groove, and a sealing gasket is arranged on the end face, adjacent to the second annular boss, of the first annular boss;

the oil seal comprises an oil seal and a pressing ring, wherein the outer peripheral surface of the oil seal is in contact with the inner peripheral surface of the first annular boss, one side of the oil seal is in contact with the end surface, close to the first annular boss, of the second annular boss, the outer peripheral surface of the pressing ring is connected with the inner peripheral surface of the flange plate, and one side of the pressing ring is in contact with the other side of the oil seal.

Drawings

Fig. 1 is a schematic perspective view of an emulsion pump according to an exemplary embodiment of the present invention.

Fig. 2 is a schematic perspective view of another emulsion pump according to an exemplary embodiment of the present invention.

Fig. 3 is an exploded view of an emulsion pump shown in an exemplary embodiment of the invention.

FIG. 4 is a cross-sectional view of another emulsion pump shown in an exemplary embodiment of the invention.

Fig. 5 is a schematic perspective view of a power end of an emulsion pump according to an exemplary embodiment of the present invention.

Fig. 6 is a schematic perspective view of a power end of an alternative emulsion pump according to an exemplary embodiment of the present invention.

FIG. 7 is a cross-sectional view of the power end of an emulsion pump according to an exemplary embodiment of the present invention.

Fig. 8 is a cross-sectional view of a valve body shown in an exemplary embodiment of the invention.

Fig. 9 is a schematic diagram of another emulsion pump fluid end configuration according to an exemplary embodiment of the present invention.

FIG. 10 is a schematic view of another valve body configuration shown in an exemplary embodiment of the present invention

Fig. 11 is a schematic structural diagram of a packing root assembly according to an exemplary embodiment of the present invention.

Fig. 12 is a schematic diagram of a structure of a pipette valve seat shown in an exemplary embodiment of the present invention.

FIG. 13 is a schematic diagram of a suction valve cartridge according to an exemplary embodiment of the present invention.

FIG. 14 is a schematic diagram of a spacer according to an exemplary embodiment of the present invention.

Figure 15 is a schematic diagram of a drain valve seat according to an exemplary embodiment of the present invention.

Fig. 16 is a schematic diagram of a drain spool according to an exemplary embodiment of the present invention.

Fig. 17 is a schematic view of a valve stopper according to an exemplary embodiment of the present invention.

Fig. 18 is a schematic structural view of a seal cartridge assembly according to an exemplary embodiment of the present invention.

Reference numerals:

an emulsion pump 100;

a power end 110;

emulsion pump fluid end 120;

a valve body 10; a first mounting hole 101; a liquid suction port 1011; a plunger cavity 102; a second mounting hole 103; a third mounting hole 104; a drain hole 1041; a first plunger hole 105; a first connection hole 1051; a second plunger hole 106; the second connection hole 1061;

a water absorbent cartridge assembly 20; a pressure plate 30; a first compression nut 40; a first positioning post 41; a first annular recess 411;

a packing assembly 50; a second compression nut 501; a connecting base 502; a second annular groove 5021; a guide ring 503; an anti-extrusion ring 504; a packing 505; a first gasket 506; a second gasket 507; a packing spring 508; a plunger assembly 51;

a suction valve seat 60; a third annular groove 601; a third annular boss 602; a guide sleeve 603;

a liquid suction valve core 61; a slide bar 611; a first stop disk 612; a support column 613; a second positioning post 614; a first return spring 62;

a spacer 70; a liquid through hole 701; positioning holes 702;

a drain valve seat 80; a fourth annular groove 801; a fourth annular boss 802;

a drain valve spool 81; a connecting portion 811; a second stop disk 812; a third positioning post 813; a fourth positioning post 814; a second return spring 82;

a valve stopper 90; a base 901; a fifth annular recess 9011; a stopper frame 902; a movable slot 9021; a sixth annular recess 9022; a connecting rod 903;

a crosshead 130;

a seal cartridge assembly 140; a seal holder 141; a flange plate 1411; a first annular boss 1412; a second annular boss 1413; a seventh annular recess 1414; an oil seal 142; and a press ring 143.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

An emulsion pump fluid end 120 according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 4-14, the emulsion pump fluid end 120 according to the embodiment of the present invention includes a valve body 10, a suction valve seat 60, a spacer 70, a drain valve seat 80, a valve stopper 90, a suction valve core 61, a drain valve core 81, a packing assembly 50, and a plunger assembly 51.

The valve body 10 has a plurality of valve chambers including a first mounting hole 101, a plunger chamber 102, a second mounting hole 103, and a third mounting hole 104 that are sequentially communicated in a height direction (up-down direction in fig. 4) of the valve body 10. The valve body 10 also has a first plunger hole 105, and the first plunger hole 105 is provided on one side (e.g., the left side in fig. 6) in the width direction (e.g., the left-right direction in fig. 6) of the valve body 10.

As shown in fig. 6, an annular protrusion is disposed at one end of the first mounting hole 101, which is far away from the plunger cavity 102, the aperture of the first mounting hole 101 is smaller than that of the second mounting hole 103, the aperture of the second mounting hole 103 is smaller than that of the third mounting hole 104, one end (left end in fig. 6) of the first plunger hole 105 is a first connection hole 1051, and the other end (right end in fig. 6) of the first plunger hole 105 is communicated with the plunger cavity 102.

As shown in fig. 7, the suction valve seat 60 is provided in the first mounting hole 101, and one end of the suction valve seat 60 (e.g., the lower end of the suction valve seat 60 in fig. 6) abuts against the annular projection.

The spacer 70 is provided in the plunger chamber 102, one end of the spacer 70 (e.g., the lower end of the spacer 70 in fig. 6) abuts against the other end of the liquid suction valve seat 60 (e.g., the upper end of the liquid suction valve seat 60 in fig. 6), the spacer 70 has a liquid passage hole 701 in the peripheral wall thereof, and the liquid passage hole 701 communicates the inner chamber of the spacer 70 with the first plunger hole 105. Therefore, the emulsion can enter and exit the first plunger hole 105 from the cavity of the spacer 70, and the emulsion can be pushed into the cavity of the discharge valve seat 80 from the cavity of the suction valve seat 60.

The drain valve seat 80 is disposed in the second mounting hole 103, and the other end of the spacer 70 (e.g., the upper end of the spacer 70 in fig. 6) abuts against one end of the drain valve seat 80 (e.g., the lower end of the drain valve seat 80 in fig. 6). The check valve 90 is disposed in the third mounting hole 104, and one end of the check valve 90 (e.g., the lower end of the check valve 90 in fig. 6) abuts against the other end of the drain valve seat 80 (e.g., the upper end of the drain valve seat 80 in fig. 6).

Thus, the valve stop 90 is able to axially position the suction valve seat 60, the discharge valve seat 80 and the spacer 70.

One end of the liquid suction valve element 61 (e.g., the upper end of the liquid suction valve element 61 in fig. 6) is engaged with one end of the liquid discharge valve element 81 (e.g., the lower end of the liquid discharge valve element 81 in fig. 6) by the first return spring 62, the other end of the liquid discharge valve element 81 (e.g., the upper end of the liquid discharge valve element 81 in fig. 6) is engaged with one end of the valve stopper 90 by the second return spring 82, a portion of the liquid suction valve element 61 can abut against the other end of the liquid suction valve seat 60, and a portion of the liquid discharge valve element 81 can abut against the other end of the liquid discharge valve seat 80.

Thus, when the plunger assembly 51 exits the plunger cavity 102 to the right, the suction spool 61 can move upward, and when the plunger assembly 51 enters the plunger cavity 102 to the left, the discharge spool 81 can move upward. When plunger chamber imbibition, plunger subassembly 51 withdraws from plunger chamber 102 right, and imbibition case 61 rebound, the flowing back case can play limiting displacement, avoids imbibition pressure too big, plays irreversible damage to first reset spring.

One end of the packing assembly 50 (e.g., the right end of the packing assembly 50 in fig. 6) is fitted with the first connecting hole 1051 to cover the first plunger hole 105, the packing assembly 50 has a through hole in which a portion of the plunger assembly 51 is located, and the outer peripheral surface of the plunger assembly 51 is clearance-fitted with the wall surface of the through hole, so that the plunger assembly 51 can move in the axial direction (e.g., the left-right direction in fig. 6) of the through hole.

As shown in fig. 6 and 7, the valve cavity further includes a liquid suction port 1011, the liquid suction port 1011 is communicated with the first mounting hole 101, the liquid suction port 1011 penetrates one side (e.g., the lower side of the valve body 10 in fig. 6) of the valve body 10 in the height direction, the third mounting hole 104 penetrates the other side (e.g., the upper side of the valve body 10 in fig. 6) of the valve body 10 in the height direction, and a liquid discharge hole 1041 is formed in the wall surface of the third mounting hole 104.

The emulsion pump fluid end 120 of the present embodiment further includes a suction box assembly 20 and a pressure plate 30. The water absorption box assembly 20 is arranged below the valve body 10, the water absorption box assembly 20 is provided with a liquid absorption cavity, and the liquid absorption cavity is communicated with the liquid absorption port 1011.

It is understood that the suction box assembly 20 may be connected to the valve body 10 by a connector (e.g., a screw), and the suction box assembly 20 may be integrally connected to the valve body 10. In particular, different connection modes are adopted for different use requirements and working environments.

Therefore, the emulsion can enter the liquid suction port 1011 from the liquid suction chamber of the water suction box assembly 20, enter the inner chamber of the liquid discharge valve seat 80 from the inner chamber of the liquid suction valve seat 60, and be discharged through the liquid discharge hole 1041.

The number of the pressing plates 30 is plural, the pressing plates 30 correspond to the plural valve cavities one by one, the pressing plates 30 are disposed above the valve body 10 so as to cover the third mounting hole 104, and the lower side of the pressing plates 30 abuts against the other end of the valve stopper 90 (e.g., the upper end of the valve stopper 90 in fig. 6). Therefore, the platen 30 can axially position the valve stopper 90, and thus the liquid suction valve seat 60, the liquid discharge valve seat 80, and the spacer 70.

According to the emulsion pump fluid end 120 of the embodiment of the invention, the first mounting hole 101 has a smaller diameter than the second mounting hole 103, and the second mounting hole 103 has a smaller diameter than the third mounting hole 104, so that the liquid suction valve seat 60, the liquid discharge valve seat 80 and the valve stopper 90 can be sequentially mounted and dismounted in a reverse order without removing the packing assembly 50, the plunger assembly 51 and other structural components. Further, the liquid suction valve seat 60 is not brought into contact with the second mounting hole 103 and the third mounting hole 104 when attached and detached, and the liquid discharge valve seat 80 is not brought into contact with the third mounting hole 104 when attached and detached, whereby damage to the valve body 10 can be reduced.

Therefore, the emulsion pump fluid end 120 of the embodiment of the invention is convenient to disassemble and assemble, simple to maintain, capable of reducing maintenance time and cost and capable of reducing damage to the valve body 10.

In some embodiments, the valve body 10 further has a second plunger hole 106, the second plunger hole 106 is provided at the other side (e.g., the right side in fig. 6) in the width direction of the valve body 10, one end (e.g., the right end in fig. 6) of the second plunger hole 106 is a second connection hole 1061, and the other end (e.g., the left end in fig. 6) of the second plunger hole 106 communicates with the plunger chamber 102.

The emulsion pump fluid end 120 of the embodiment of the present invention further includes a first compression nut 40 and a first positioning post 41, wherein the first compression nut 40 is in threaded fit with the second connection hole 1061 to plug the second plug hole 106.

The first locating stud 41 is disposed within the second plunger bore 106 with at least a portion of the first locating stud 41 being located between the first compression nut 40 and the spacer 70. Therefore, the first compression nut 40 can compress the first positioning column 41.

Part of the outer peripheral surface of the first positioning column 41 is in contact with the wall surface of the other end of the second plunger hole 106, a first annular groove 411 is formed in part of the outer peripheral surface of the first positioning column 41, and a first annular sealing member is arranged in the first annular groove 411. Therefore, the first annular seal member can seal between a part of the outer peripheral surface of the first positioning column 41 and the wall surface of the other end of the second plunger hole 106, and prevent the emulsion from leaking.

As shown in fig. 6, 7 and 11, the peripheral wall of the spacer 70 further has a positioning hole 702, and the positioning hole 702 and the liquid passage hole 701 are disposed opposite to each other in the width direction of the valve body 10. That is, the positioning hole 702 is located on the right side, and the liquid passage hole 701 is located on the left side.

One end of the first positioning column 41 adjacent to the spacer 70 is provided with a positioning protrusion, and the positioning protrusion extends into the positioning hole 702 to circumferentially position the spacer 70. Thus, the position of the spacer 70 within the plunger cavity 102 is fixed.

In some embodiments, as shown in fig. 6 and 7, the first plunger bore 105 is a stepped bore, the right end face of the packing assembly 50 contacts with the stepped face of the stepped bore, the end face of one end of the packing assembly 50 is provided with a second annular groove 5021, and a second annular seal is arranged in the second annular groove 5021. Therefore, the second annular sealing element can seal between the right end face of the packing assembly 50 and the step face of the step hole, and emulsion is prevented from leaking.

In some embodiments, as shown in fig. 6, 7, 9-13, the outer peripheral surface of the liquid suction valve seat 60 is in clearance fit with the wall surface of the first mounting hole 101, the outer peripheral surface of the liquid suction valve seat 60 is provided with a third annular groove 601, and a third annular seal is provided in the third annular groove 601. Therefore, the third annular seal can seal between the outer peripheral surface of the liquid suction valve seat 60 and the wall surface of the first mounting hole 101, and prevent the emulsion from leaking.

The peripheral surface of the liquid discharge valve seat 80 is in clearance fit with the wall surface of the second mounting hole 103, a fourth annular groove 801 is formed in the peripheral surface of the liquid discharge valve seat 80, and a fourth annular sealing piece is arranged in the fourth annular groove 801. Therefore, the fourth annular seal can seal between the outer peripheral surface of the liquid suction valve seat 60 and the wall surface of the second mounting hole 103, and prevent the emulsion from leaking.

As shown in fig. 6 and 9, the upper end of the liquid suction valve seat 60 is provided with a third annular projection 602, and the third annular projection 602 extends into the inner cavity of the spacer 70 so as to abut against the lower end of the spacer 70. The upper end of the liquid suction valve seat 60 is also provided with a first conical surface which is respectively connected with the inner peripheral surface and the upper end surface of the liquid suction valve seat 60.

The interior of the suction valve seat 60 is also provided with a guide sleeve 603. the guide sleeve 603 is connected to the inner peripheral surface of the suction valve seat 60 by a plurality of connectors.

As shown in fig. 10, the suction spool 61 includes a slide bar 611, a first stop disk 612, and a support post 613, the first stop disk 612 being connected between the slide bar 611 and the support post 613.

The sliding rod 611 extends into the guide sleeve 603, and the peripheral surface of the sliding rod 611 is in clearance fit with the inner peripheral surface of the guide sleeve 603. The edge of the first stopper disk 612 is substantially V-shaped in cross section, and the lower edge of the first stopper disk 612 abuts against the first tapered surface.

The upper end of the supporting pillar 613 is provided with a second positioning pillar 614, and the lower end of the first return spring 62 is sleeved on the second positioning pillar 614.

As shown in fig. 6 and 12, the lower end of the drain valve seat 80 is provided with a fourth annular boss 802, and the fourth annular boss 802 extends into the inner cavity of the spacer 70 so as to be capable of abutting against the upper end of the spacer 70. The upper end of the liquid suction valve seat 60 is further provided with a second tapered surface, and the second tapered surface is connected to the inner peripheral surface and the upper end surface of the liquid discharge valve seat 80, respectively.

As shown in fig. 12, the drain spool 81 includes a connecting portion 811 and a second stopper plate 812. A third positioning column 813 is disposed at the lower end of the connecting portion 811, and a fourth positioning column 814 is disposed at the upper end of the second stopping disk 812.

The upper end of the first return spring 62 is sleeved on the third positioning column 813, and the third positioning column 813 is connected with the upper end of the first return spring 62. The lower end of the second return spring 82 is sleeved on the fourth positioning column 814.

The edge of the second stop disk 812 is generally V-shaped in cross-section, with the lower edge of the second stop disk 812 abutting the second tapered surface.

In some embodiments, as shown in fig. 6, 7 and 14, the valve stop 90 comprises a base 901, a stop bracket 902 and a connecting rod 903. The connecting rod 903 is connected between the base 901 and the stopper frame 902.

The base 901 is located at the upper end of the valve stopper 90, the outer peripheral surface of the base 901 is in clearance fit with the wall surface of the third mounting hole, a fifth annular groove 9011 is formed in the outer peripheral surface of the base 901, and a fifth annular sealing element is arranged in the fifth annular groove 9011. Therefore, the fifth seal can seal between the outer peripheral surface of the base 901 and the wall surface of the third mounting hole, and prevent the emulsion from leaking.

The stopping frame 902 is arranged at the lower end of the valve stopping device 90, the stopping frame 902 is provided with a movable groove 9021, the upper end of the liquid drainage valve core 81 is positioned in the movable groove 9021, the bottom wall surface of the movable groove 9021 is provided with a sixth annular groove 9022, the upper end of the second return spring 82 is arranged in the sixth annular groove 9022, and the lower end of the stopping frame 902 abuts against the upper end of the liquid drainage valve seat 80.

Therefore, the stopper 90 can position the drain valve seat 80 and can provide a space for the drain valve member 81 to move.

In some embodiments, as shown in fig. 6 and 8, the packing assembly 50 includes a connecting seat 502, a second compression nut 501, a guide ring 503, an anti-extrusion ring 143504, a packing 505, a first washer 506, a second washer 507, and a packing spring 508.

The guide ring 503, the anti-extrusion ring 143504, the packing 505, the first washer 506 and the second washer 507 are arranged in sequence from left to right.

The outer peripheral face of the right end of connecting seat 502 is equipped with first screw thread, and the outer peripheral face of the left end of connecting seat 502 is equipped with the second screw thread, and the right end of connecting seat 502 and first connecting hole 1051 screw-thread fit. The inner peripheral surface of connecting seat 502 encloses into the through-hole, and the inner peripheral surface of connecting seat 502 is equipped with the annular groove, and second annular recess 5021 establishes the terminal surface at the one end of connecting seat 502.

The second gland nut 501 is in threaded fit with the left end of the connecting seat 502, the second gland nut 501 is provided with a central hole, the central hole is communicated with the annular groove, and the diameter of the central hole is smaller than that of the annular groove.

The guide ring 503 includes a first portion having an outer diameter smaller than that of a second portion having an outer peripheral surface in contact with the wall surface of the center hole and an outer peripheral surface in contact with the peripheral wall surface of the annular groove. The outer peripheral surface of the anti-extrusion ring 143504 contacts the peripheral wall surface of the annular groove, and the left side of the anti-extrusion ring 143504 contacts the guide ring 503. The outer peripheral surface of the packing 505 contacts the peripheral wall surface of the annular groove, and the left side of the packing 505 contacts the other side of the anti-extrusion ring 143504. The outer peripheral surface of the first washer 506 contacts the peripheral wall surface of the annular groove, and the left side of the first washer 506 contacts the right side of the packing 505. The outer peripheral surface of the second gasket 507 is in contact with the peripheral wall surface of the annular groove, the left side of the second gasket 507 is in contact with the right side of the first gasket 506, the right side of the second gasket 507 is in contact with the side wall surface of the annular groove, and an annular cavity is arranged inside the second gasket 507. The packing spring 508 is disposed within the annular cavity.

Therefore, the packing assembly 50 is only required to be attached to or detached from the valve body 10 by attaching or detaching the right end of the attachment seat 502 to or from the valve body 10. When the packing 505 is replaced, the second compression nut 501 is only required to be separated from the left end of the connecting seat 502, and then the guide ring 503, the anti-extrusion ring 143504 and the packing 505 are sequentially removed.

Therefore, the emulsion pump fluid end 120 of the embodiment of the invention is convenient to disassemble and assemble, simple to maintain and capable of reducing maintenance time and cost.

An emulsion pump 100 according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1-15, an emulsion pump 100 according to an embodiment of the present invention includes a fluid end, a power end 110, and a crosshead 130 and a capsule assembly 140. The fluid end is an emulsion pump fluid end 120 as described in any of the embodiments above.

The power end 110 includes a power shaft and a guide cylinder, and an outer circumferential surface of the power shaft is in clearance fit with an inner circumferential surface of the guide cylinder so that the power shaft reciprocates in an axial direction of the guide cylinder. The right end of the crosshead 130 is connected to the plunger assembly 51 and the left end of the crosshead 130 is connected to the power shaft.

The sealing case assembly 140 includes a sealing frame 141, an oil seal 142, and a pressing ring 143.

The seal carrier 141 includes a flange plate 1411, a first annular boss 1412 and a second annular boss 1413, the first annular boss 1412 being connected between the flange plate 1411 and the second annular boss 1413. Specifically, the flange plate 1411, the first annular boss 1412 and the second annular boss 1413 are integrally connected from right to left in this order.

The radial dimension of the outer peripheral surface of the first annular boss 1412 is smaller than that of the outer peripheral surface of the flange plate 1411, the radial dimension of the outer peripheral surface of the second annular boss 1413 is smaller than that of the outer peripheral surface of the first annular boss 1412, the radial dimension of the inner peripheral surface of the first annular boss 1412 is smaller than that of the inner peripheral surface of the flange plate 1411, and the radial dimension of the inner peripheral surface of the second annular boss 1413 is smaller than that of the inner peripheral surface of the first annular boss 1412.

The flange plate 1411 is connected to the right end surface of the guide cylinder, and the outer circumferential surface of the first annular projection 1412 contacts the first partial outer circumferential surface of the guide cylinder. The outer peripheral surface of the second annular boss 1413 is in contact with the inner peripheral surface of the second portion of the guide cylinder, the outer peripheral surface of the second annular boss 1413 is provided with a seventh annular groove 1414, the seventh annular groove 1414 is provided with a sixth annular seal, and the end surface of the first annular boss 1412 adjacent to the second annular boss 1413 is provided with a sealing gasket. Therefore, the sixth annular seal and the sealing gasket can seal the contact portion of the seal holder 141 and the guide cylinder

The outer peripheral surface of the oil seal 142 is in contact with the inner peripheral surface of the first annular boss 1412, the left side of the oil seal 142 is in contact with the end surface of the second annular boss 1413 adjacent to the first annular boss 1412, the outer peripheral surface of the pressing ring 143 is connected with the inner peripheral surface of the flange plate 1411, and the left side of the pressing ring 143 is in contact with the right side of the oil seal 142.

According to the emulsion pump 100 of the embodiment of the present invention, the flange plate 1411, the first annular boss 1412 and the second annular boss 1413 are integrally connected, so that the fitting relationship can be reduced, the sealing is facilitated, and the thickness of the seal box assembly 140 can be reduced.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.