1. The utility model provides a modular pressure compensating valve, includes disk seat (1), case (2) and valve body (3), its characterized in that: the improved valve is characterized in that an inner groove (4) is formed in the bottom of the valve seat (1), side grooves (21) are formed in the periphery of the inner wall of the inner groove (4), a clamping groove (22) is formed in the upper end of the valve seat (1), a gear groove (22) is formed in the valve seat (1) and located between the clamping groove (22) and the inner groove (4), the upper end of the side groove (21) extends upwards and is communicated with the gear groove (22), the valve body (3) is installed at the lower end of the valve seat (3), an oil groove (10) is formed in the upper end of the valve body (3), the valve core (2) is located in the oil groove (10) and extends to the inner part of the inner groove (4), the valve core (2) is respectively connected with the oil groove (10) and the inner groove (4) in a sliding mode, a retaining ring is fixedly connected to the upper end of the outer side of the valve core (2), the retaining ring is located in the inner groove (4) and is connected with the inner groove (2) in a sliding mode, a top ring (12) is arranged in the inner groove (4) and located on the outer side of the valve core (2), the outer side of the top ring (12) is positioned in the side groove, a threaded sleeve (19) is fixedly connected with the outer side of the top ring (12), the inner side of the side groove (21) is rotatably connected between the upper end and the lower end of the inner wall of the side groove, the threaded sleeve (19) is sleeved on the outer side of the adjacent screw rod (13), the upper end of the screw rod (13) upwards extends into the gear groove (20), the outer side of the upper end of the screw rod (13) is fixedly connected with a second gear (14), a first gear (15) is arranged in the gear groove (20) and positioned between the four second gears (14), the first gear (15) is meshed with all the second gears (14), a clamping ring (23) is fixedly connected with the upper end of the first gear (15) and positioned in the clamping groove (22), a top cover (17) is sleeved on the outer side of the clamping ring (23), a second spring (18) is arranged in the clamping ring (23), and a buffer groove (6) is formed in the upper end of the valve core (2), the damping valve is characterized in that a mounting seat (25) is mounted at the upper end inside the buffer groove (6), the upper end and the lower end of the mounting seat (25) are communicated, a first oil outlet (8), a second oil outlet (7) and a second oil outlet (9) are sequentially formed in the outer side of the valve body (3) from top to bottom, two first oil outlets (8), two second oil outlets (7) and two second oil outlets (9) are respectively arranged and are communicated with the oil groove (10), an oil through groove (11) is formed in one circle of the outer side of the valve core (2), the oil groove (11) is annular, an oil inlet (26) is formed in the outer side of the valve body (3) and is positioned at the upper end of the first oil outlet (8), a damping hole (27) communicated with the buffer groove (6) is formed in the outer side of the valve core (2) and is positioned at the upper end of the oil through groove (11), an inner T-shaped pipe (30) is arranged inside the buffer groove (6), and the upper end and the lower end of the inner T-shaped pipe (30) is communicated with the buffer groove (6), buffer slot (6) inner wall just is located damping hole (27) lower extreme and interior T venturi tube (30) outside lower extreme fixed connection, regulation mouth (28) have been seted up in oil groove (10).

2. A modular pressure compensating valve as claimed in claim 1, in which: the oil through opening (7) is communicated with an external main oil way, and the oil inlet (26) and the adjusting opening (28) are respectively communicated with the first oil outlet (8) and the second oil outlet (9) through a shunt pipe.

3. A modular pressure compensating valve as claimed in claim 1, in which: and a main spring (5) is arranged on the outer side of the valve core (2) and between the baffle ring and the top ring (12), and the upper end and the lower end of the main spring (5) are respectively contacted with the lower end of the baffle ring and the upper end of the top ring (12).

4. A modular pressure compensating valve as claimed in claim 1, in which: snap ring (23) outside a week all with six spacing of fixedly connected with, six spacing grooves have evenly been seted up to top cap (17) inner wall a week, spacing one-to-one is located the spacing inslot, just spacing and spacing groove sliding connection.

5. A modular pressure compensating valve as claimed in claim 1, in which: the clamping groove is characterized in that clamping teeth are uniformly and fixedly connected to the inner wall of the clamping groove (22) in a circle, clamping blocks are uniformly and fixedly connected to the outer side of the top cover (17) in a circle, the clamping teeth are connected with all the clamping blocks in an inserting mode, and the upper end of the top cover (17) is provided with a cross groove.

6. A modular pressure compensating valve as claimed in claim 1, in which: the upper end and the lower end of the second spring (18) are respectively contacted with the upper end of the inner wall of the top cover (17) and the upper end of the first gear (15).

7. A modular pressure compensating valve as claimed in claim 1, in which: the buffer tank (6) lower extreme is provided with check valve (29), buffer tank (6) link up with oil groove (10) through check valve (29).

8. A modular pressure compensating valve as claimed in claim 1, in which: and sealing rings are arranged on the outer side of the valve core (2) and at the upper end and the lower end of the oil through groove (11).

Background

The pressure compensating valve can provide stable and constant flow for the load communicated with the priority port, oil can be supplied to the bypass port only when the oil supply amount exceeds the load requirement of the priority port, and the priority oil supply characteristic of the pressure compensating valve enables the pressure compensating valve to be widely applied to hydraulic control systems.

However, when the conventional pressure compensating valve supplies oil to the main oil supply port, when the main oil supply port reaches a certain amount, the valve element is moved by the increase of the oil pressure, so that the main oil passage starts to supply oil to the secondary oil supply port, and thus, although the main oil supply port supplies oil in advance of the secondary oil supply port, the oil pressure of the main oil supply port cannot be changed.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a combined pressure compensation valve to solve the problems mentioned in the background art.

The technical scheme adopted by the invention for solving the technical problems is as follows: a combined pressure compensation valve comprises a valve seat, a valve core and a valve body, wherein an inner groove is formed in the bottom of the valve seat, side grooves are formed in the periphery of the inner wall of the inner groove, a clamping groove is formed in the upper end of the valve seat, a gear groove is formed in the valve seat and positioned between the clamping groove and the inner groove, the upper end of each side groove extends upwards and is communicated with the gear groove, the valve body is installed at the lower end of the valve seat, an oil groove is formed in the upper end of the valve body, the valve core is positioned in the oil groove, the upper end of the valve core extends into the inner groove, the valve core is respectively connected with the oil groove and the inner groove in a sliding manner, a retaining ring is fixedly connected to the upper end of the outer side of the valve core and positioned in the inner groove in a sliding manner, a top ring is arranged in the inner groove and positioned outside the valve core, threaded sleeves are fixedly connected to the outer side of the top ring and positioned in the side grooves, and a screw rod is rotatably connected between the upper end and the lower end of the inner wall of the side groove, the threaded sleeves are all sleeved outside the adjacent screw rods, the upper ends of the screw rods extend upwards to the inside of the gear grooves, the outer sides of the upper ends of the screw rods are fixedly connected with gear II, gear I is arranged in the gear grooves and between the four gear II, the gear I is meshed with all the gear II, the upper ends of the gear I are fixedly connected with snap rings in the clamping grooves, the outer sides of the snap rings are sleeved with top covers, springs II are arranged in the snap rings, buffer grooves are formed in the upper ends of the valve cores, mounting seats are arranged at the upper ends of the inner parts of the buffer grooves, the upper ends and the lower ends of the mounting seats are communicated, oil outlets I, oil outlets and oil outlets II are sequentially formed in the outer side of the valve body from top to bottom, the oil outlets I, the oil outlets and the oil outlets are provided with two oil grooves, and the oil grooves are communicated with one circle of the outer side of the valve core, the oil groove is annular, the oil inlet has been seted up to the valve body outside and being located an oil-out upper end, the case outside just is located logical oil groove upper end and has seted up the communicating damping hole with the dashpot, the dashpot inside is provided with interior T venturi tube, the upper and lower extreme all link up with the dashpot on the interior T venturi tube, the dashpot inner wall just is located damping hole lower extreme and interior T venturi tube outside lower extreme fixed connection, the regulation mouth has been seted up to the oil groove.

Specifically, the oil through opening is communicated with an external main oil way, and the oil inlet and the adjusting opening are respectively communicated with the first oil outlet and the second oil outlet through the shunt tubes.

Specifically, a main spring is arranged on the outer side of the valve core and between the baffle ring and the top ring, and the upper end and the lower end of the main spring are respectively contacted with the lower end of the baffle ring and the upper end of the top ring.

Specifically, snap ring outside a week all with six spacing of fixedly connected with, six spacing grooves have evenly been seted up to top cap inner wall a week, spacing one-to-one is located the spacing inslot, just spacing and spacing groove sliding connection.

Specifically, the even fixedly connected with latch of draw-in groove inner wall a week, the even fixedly connected with fixture block of top cap outside a week, the latch is pegged graft with all fixture blocks, the cross recess has been seted up to the top cap upper end.

Specifically, the upper end and the lower end of the second spring are respectively contacted with the upper end of the inner wall of the top cover and the upper end of the first gear.

Specifically, the dashpot lower extreme is provided with the check valve, the dashpot passes through the check valve and link up with the oil groove.

Specifically, the outer side of the valve core and the upper end and the lower end of the oil through groove are both provided with sealing rings.

Compared with the prior art, the invention has the following beneficial effects: the combined pressure compensation valve has the advantages that oil in the main oil way enters the oil through hole and is then discharged from the first oil outlet, and the oil in the first oil outlet enters the buffer groove through the shunt pipe, the oil inlet and the damping hole, so that when the oil discharged into the first oil outlet reaches a certain oil pressure, the oil pressure in the buffer groove is larger than the elastic force of the main spring, the valve core moves downwards, the oil in the oil through groove can be discharged from the second oil outlet, the automatic oil pressure adjusting function of the pressure compensation valve is realized, the oil in the second oil outlet also enters the oil groove through the shunt pipe, so that when the oil in the second oil outlet reaches a certain oil pressure, the oil in the oil groove can enter the buffer groove through the check valve, the oil in the groove passes through the inner T-shaped pipe and is then discharged from the damping hole, and the oil in the buffer groove can be prevented from being adhered to the bottom of the buffer groove, in addition, the top cover is rotated to drive the screw rod to rotate through the first gear and the second gear, the top ring is further made to move up and down, the top ring can extrude or loosen the main spring, elasticity of the main spring is changed, oil pressure of the buffer groove is changed, and therefore the function of manually adjusting the oil pressure of the pressure valve is achieved.

Drawings

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is a schematic view of the valve cartridge of the present invention cut away at the upper portion;

FIG. 3 is a schematic view of the internal structure of the valve seat of the present invention;

FIG. 4 is a cut-away view of the valve seat of the present invention;

fig. 5 is a cut-away view of the overcap of the present invention.

In the figure: the valve comprises a valve seat-1, a valve core-2, a valve body-3, an inner groove-4, a main spring-5, a buffer groove-6, an oil through port-7, an oil outlet I-8, an oil outlet II-9, an oil groove-10, an oil through groove-11, a top ring-12, a screw rod-13, a gear II-14, a gear I-15, a top groove-16, a top cover-17, a spring II-18, a threaded sleeve-19, a gear groove-20, a side groove-21, a clamping groove-22, a clamping ring-23, a clamping block-24, a mounting seat-25, an oil inlet port-26, a damping hole-27, an adjusting port-28, a one-way valve-29 and an inner T-shaped pipe-30.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Referring to fig. 1-5, the present invention provides a technical solution: a combined pressure compensation valve comprises a valve seat 1, a valve core 2 and a valve body 3, wherein the bottom of the valve seat 1 is provided with an inner groove 4, the periphery of the inner wall of the inner groove 4 is provided with side grooves 21, the upper end of the valve seat 1 is provided with a clamping groove 22, a gear groove 22 is arranged in the valve seat 1 and between the clamping groove 22 and the inner groove 4, the upper end of the side groove 21 extends upwards and is communicated with the gear groove 22, the valve body 3 is arranged at the lower end of the valve seat 3, the upper end of the valve body 3 is provided with an oil groove 10, the valve core 2 is positioned in the oil groove 10, the upper end of the valve core 2 extends into the inner groove 4, the valve core 2 is respectively connected with the oil groove 10 and the inner groove 4 in a sliding manner, the upper end of the outer side of the valve core 2 is fixedly connected with a retaining ring which is positioned in the inner groove 4 and is connected with the inner groove in a sliding manner, the inner groove 4 and positioned outside the valve core 2 is provided with a top ring 12, the outer side of the top ring 12 and positioned in the side groove are both fixedly connected with a thread bush 19, and a screw 13 is rotatably connected between the upper end and the lower end of the inner wall of the side groove 21, the threaded sleeves 19 are all sleeved outside the adjacent screw rods 13, the upper ends of the screw rods 13 extend upwards to the inside of the gear grooves 20, the outer sides of the upper ends of the screw rods 13 are fixedly connected with the second gears 14, the first gears 15 are arranged inside the gear grooves 20 and between the four second gears 14, the first gears 15 are meshed with all the second gears 14, the upper ends of the first gears 15 are fixedly connected with the snap rings 23 inside the snap grooves 22, the outer sides of the snap rings 23 are sleeved with the top covers 17, springs 18 are arranged inside the snap rings 23, the upper end of the valve core 2 is provided with the buffer groove 6, the upper end inside the buffer groove 6 is provided with the mounting seat 25, the upper end and the lower end of the mounting seat 25 are communicated, the outer side of the valve body 3 is sequentially provided with the first oil outlet 8, the second oil outlet 7 and the second oil outlet 9 from top to bottom, the first oil outlet 8, the second oil outlet 7 and the second oil outlet 9 are provided with two oil outlets and are communicated with the oil groove 10, the oil groove 11 is arranged on the outer side of the valve core 2 in a circle, the oil groove 11 is annular, an oil inlet 26 is arranged at the outer side of the valve body 3 and positioned at the upper end of the oil outlet I8, a damping hole 27 communicated with the buffer groove 6 is arranged at the outer side of the valve core 2 and positioned at the upper end of the oil through groove 11, an inner T-shaped pipe 30 is arranged inside the buffer groove 6, the upper end and the lower end of the inner T-shaped pipe 30 are communicated with the buffer groove 6, the lower end of the damping hole 27 and positioned at the inner wall of the buffer groove 6 are fixedly connected with the lower end of the outer side of the inner T-shaped pipe 30, an adjusting port 28 is arranged on the oil groove 10, the oil through port 7 is communicated with an external main oil path, the oil inlet 26 and the adjusting port 28 are respectively communicated with the oil outlet I8 and the oil outlet II 9 through a shunt pipe, a main spring 5 is arranged at the outer side of the valve core 2 and positioned between the baffle ring and the top ring 12, the upper end and the lower end of the baffle ring are respectively contacted with the upper end of the top ring 12, a circle of the outer side of the snap ring 23 is fixedly connected with six limiting strips, a circle of the inner wall of the top cover 17 is uniformly provided with six limiting grooves, the limiting strips are correspondingly positioned in the limiting grooves one by one and are in sliding connection with the limiting grooves, clamping teeth are uniformly and fixedly connected to the periphery of the inner wall of the clamping groove 22, clamping blocks are uniformly and fixedly connected to the periphery of the outer side of the top cover 17, the clamping teeth and all the clamping blocks are in plug-in connection, a cross groove is formed in the upper end of the top cover 17, the upper end and the lower end of a second spring 18 are respectively in contact with the upper end of the inner wall of the top cover 17 and the upper end of a first gear 15, a one-way valve 29 is arranged at the lower end of the buffer groove 6, the buffer groove 6 is communicated with the oil groove 10 through the one-way valve 29, and sealing rings are arranged on the outer side of the valve core 2 and on the upper end and the lower end of the oil through groove 11;

in the pressure compensating valve, oil in a main oil path enters a valve body 3 from an oil through port 7 and then flows out from an oil outlet port I8 and an oil outlet port II 9, the oil in the valve body 3 preferentially flows out from the oil outlet port I8, the oil outlet port II 9 is used as a secondary channel, so that when the main oil path is used for oil supply, the oil enters an oil through port 7 on the left side and the right side into an oil through groove 11, a valve core 2 is extruded by a main spring 5 to be positioned at the upper end of an oil groove 10 in an initial state, the oil outlet port I8 is communicated with the oil through groove 11, the oil in the oil through groove 11 flows outwards from the oil outlet port I8, the oil outlet port II 9 is blocked by the valve core 2, the oil through groove 11 is not communicated with the oil outlet port II 9, the oil through groove 11 preferentially flows out from the oil outlet port I8, sealing rings are arranged at the upper position and the lower position of the oil through groove 11, and the oil in the oil through groove 11 can flow towards the oil outlet port I8, further preventing the oil in the oil through groove 11 from flowing out of the oil outlet II 9;

furthermore, since the oil inlet 26 is connected with the oil outlet 8 through a pipeline, when the oil in the oil through groove 11 flows into the oil outlet 8, the oil in the oil outlet 8 flows into the oil inlet 26, and the oil inlet 26 is connected with the buffer groove 6 through the damping hole 27, so that when the oil flowing through the oil outlet 8 reaches a certain amount, the oil pressure in the oil outlet 8 rises, and thus the oil pressure in the oil inlet 26 rises, and slowly enters the buffer groove 6 through the damping hole 27, and when the oil in the buffer groove 6 increases continuously, and due to the existence of the check valve 29 at the lower end of the buffer groove 6, the oil in the buffer groove 6 cannot enter the oil groove 10 through the check valve 29, so that the oil pressure in the buffer groove 6 rises, and thus the lower end of the buffer groove 6 is squeezed by the oil pressure, so that the valve core 2 is forced downwards, and further the elastic force of the main spring 5 is overcome to move downwards, so that the oil through groove 11 moves downwards, further the outer wall of the valve core 2 and the sealing ring can partially block the first oil outlet 8, the second oil outlet 9 is communicated with the oil through groove 11, the oil through groove 11 can start to supply oil to the second oil outlet 9, meanwhile, the oil in the second oil outlet 9 can enter the adjusting port 28 through the shunt pipe and flow into the bottom of the oil groove 10 through the adjusting port 28, so that the oil pressure at the bottom of the oil groove 10 is prevented from rising, and the oil pressure at the first oil outlet 8 is reduced, so that the oil groove 10 enters the buffer groove 6 through the check valve 29, so that the oil entering from the check valve 29 can extrude the original oil in the buffer groove 6 upwards, because the lower end of the inner T-shaped pipe 30 is fixed with the wall of the buffer groove 6, the oil in the buffer groove 6 can flow upwards through the inner T-shaped pipe 30 firstly, then enters the damping hole 27 from the outer part of the inner T-shaped pipe 30, and then the oil in the buffer groove 6 returns to the first oil outlet 8 again, furthermore, the force exerted by the oil pressure in the buffer groove 6 is smaller than the elastic force of the main spring 5 and the force exerted by the oil pressure at the bottom of the oil groove 10, so that the valve core 2 moves upwards, the oil supply rate of the oil outlet I8 is adjusted through the oil pressure, the oil in the buffer groove 6 is drained into the oil outlet I8 again, and the oil in the buffer groove 6 can be prevented from being adhered to the bottom of the buffer groove 6 due to non-circulation;

in addition, the top cover 17 is pressed downwards by using a tool, so that the clamping blocks 24 are separated from the clamping teeth, the top cover 17 can move downwards along the limiting strips and the limiting grooves, meanwhile, the second spring 18 can contract into the clamping rings 23, the top cover 17 is rotated while being pressed, the top cover 17 utilizes the clamping positions of the limiting strips and the limiting grooves, so that the top cover 17 drives the first gear 15 to rotate, the first gear 15 is meshed with the second gear 14, so that the second gear 14 can rotate along with the first gear 15, a screw fixedly connected with the second gear 14 is rotated, the threaded sleeve 19 can move up and down, the top ring 12 can descend by rotating the top cover 17 when oil in the main oil path flows to the first oil outlet 8, so that the elastic force of the main spring 5 is weakened, and the oil pressure in the corresponding buffer groove 6 is larger than the elastic force of the main spring 5, thus, the valve core 2 moves downwards, and the oil pressure of the first oil outlet 8 is reduced;

when oil in the main oil way flows to the oil outlet II 9, the top cover 17 is rotated to further enable the top ring 12 to ascend, so that the elasticity of the main spring 5 is enhanced, the elasticity of the main spring 5 is larger than the oil pressure in the buffer groove 6, the valve core 2 moves upwards, and the oil pressure of the oil outlet II 9 is reduced.

The present invention should be considered as limited only by the preferred embodiments of the invention, and not limited to the above embodiments, and it should be understood that any modifications, equivalents and improvements made within the spirit and principle of the invention are included in the scope of the invention.