1. The utility model provides a big latus rectum dry-type quick-operation joint which characterized in that: comprises a male connector and a female connector which are matched with each other; the male connector comprises a male connector shell assembly (1), a male connector fixed valve core assembly (2) and a male connector movable valve core assembly (3); the female joint comprises a female joint shell assembly (4), a female joint valve core assembly (5) and a female joint locking assembly (6);

the male joint fixed valve core assembly (2) comprises a fixed valve core (21) and a fixed valve core seat (22); the male joint moving valve core assembly (3) comprises a first moving valve core (31), a first moving valve core sealing piece (32), a first return spring (33), a second moving valve core (34) and a second return spring (35); the male connector movable valve core assembly (3) is arranged between the male connector shell assembly (1) and the male connector fixed valve core assembly (2); the fixed valve core seat (22) is arranged at the central position of the male joint channel, the fixed valve core (21) is arranged at the central position of the fixed valve core seat (22), the first return spring (33) is arranged outside the fixed valve core (21), one end of the first return spring (33) is connected with the first movable valve core (31), the other end of the first return spring is connected with the fixed valve core seat (22), the first movable valve core sealing piece (32) is arranged on the inner surface of the top end of the first movable valve core (31), the top end of the first movable valve core (31) is in the direction of being connected with the female joint, the second return spring (35) is arranged inside the first movable valve core (31) and is connected with the second movable valve core (34), and the first movable valve core (31) reciprocates under the traction of the first return spring (33), the second movable valve core (34) reciprocates under the traction of the second return spring (35); the rear part of the top end of the fixed valve core (21) is of a stepped structure, and the height difference of the stepped structure is equal to the thickness of the top end of the second movable valve core (34);

the female joint valve core assembly (5) comprises a valve core (51), a valve core seat (52), a valve core sleeve (53) and a return spring (54); the valve core seat (52) is arranged at the central position of the female joint channel, the valve core sleeve (53) is arranged inside the center of the valve core seat (52), the tail part of the valve core (51) is arranged inside the valve core sleeve (53), the reset spring (54) is arranged outside the valve core (51) and the valve core sleeve (53), and the valve core (51) can reciprocate in the valve core sleeve (53) under the traction of the reset spring (54).

2. A large-bore dry quick connector as claimed in claim 1, wherein: the male connector housing assembly (1) comprises a male connector housing (11), a male connector housing seal (12) and a male connector outer-to-outer seal (13); the male connector shell sealing element (12) is arranged on the inner surface of the top end of the male connector shell (11), wherein the top end of the male connector shell (11) is in the direction of connection with the female connector, and the male connector outer sealing element (13) is arranged at the tail end of the male connector shell (11).

3. A large-bore dry quick connector as claimed in claim 2, wherein: and a spiral male joint shell locking curve groove (111) is formed in the outer side of the male joint shell (11).

4. A large-bore dry quick connector as claimed in claim 1, wherein: the surfaces of the fixed valve core (21) and the valve core (51) are both flat-head structures.

5. The large-bore dry quick connector as claimed in claim 4, wherein: the fixed valve core positioning groove (211) is formed in the center of the top end of the fixed valve core (21), the valve core positioning lug (512) is formed in the center of the top end of the valve core (51), and the fixed valve core positioning groove (211) and the valve core positioning lug (512) can be matched in size.

6. The large-bore dry quick connector as claimed in claim 5, wherein: the shape of the fixed valve core positioning groove (211) is a truncated cone shape or a cylinder shape.

7. A large-bore dry quick connector as claimed in any one of claims 4 to 6, wherein: and a plurality of valve core diversion grooves (511) are formed around the top end of the valve core (51).

8. A large-bore dry quick connector as claimed in claim 1, wherein: the box housing assembly (4) includes a box housing (41), a box housing seal (42), and a box to box seal (43); the female joint shell sealing piece (42) is arranged on the inner surface of the top end of the female joint shell (41), wherein the top end of the female joint shell (41) is in the direction of connection with the male joint, and the female joint outer sealing piece (43) is arranged at the tail end of the female joint shell (41).

9. A large-bore dry quick connector as claimed in claim 8, wherein: the female joint locking assembly (6) is arranged outside the shell (41), and the female joint locking assembly (6) comprises a locking outer sleeve (61), an operating hand wheel (62), a locking roller (63), a plurality of steel balls (64), a guide ring (65) and a steel ball fixing ring (66); the steel ball locking device is characterized in that a circular ring groove with a semicircular cross section is formed in the outer portion of the shell (41), the steel ball (64) is arranged in the circular ring groove, the steel ball fixing ring (66) is arranged on the outer side of the steel ball (64) and used for fixing the position of the steel ball (64), and the guide ring (65) is arranged at the contact position of the locking outer sleeve (61) and the shell (41).

10. A large-bore dry quick connector as claimed in claim 9, wherein: the operating hand wheel (62) and the locking outer sleeve (61) are locked through a pin shaft structure, the locking roller (63) is arranged on the inner side wall of the top end of the locking outer sleeve (61), and the top end of the locking outer sleeve (61) is in the direction connected with the male connector.

Background

In large flow fluid delivery systems, fluid communication and disconnection operations are often required for assembly, commissioning and maintenance of the system. In the joint device in the prior art, stop valves are usually added at two ends of a male joint and a female joint, the joints are only responsible for communication and sealing, and then the connection and disconnection of fluid are controlled by operating the valves. The mode not only increases the quantity, volume and cost of equipment, but also has certain medium leakage amount in the connection and disconnection processes, and has the problems of environmental pollution and material waste especially for toxic, harmful, high-risk and precious fluid media, thereby having greater potential safety hazard to operators. On the other hand, because a certain amount of impurities and particles exist in the fluid, the impurities and the particles are easily enriched at the sealing part, so that the overall sealing performance is influenced, and a leakage phenomenon occurs.

The traditional Chinese patent application publication No. CN 10839631A discloses a locking type self-sealing dry quick joint, which comprises a male joint and a female joint; the male connector comprises a shell, a male connector valve seat, a guide spring bushing, a spring, a sliding valve core and a spiral guide groove; the female joint comprises a shell, a valve core supporting seat, a fixed valve core, a sliding valve seat, a guide bushing, a spring, a front end cover, a cam and an operating hand wheel; the quick connector is axially screwed in and out of the male connector through the female connector to realize connection and disconnection, and the leakage amount of media in the connection and disconnection process during fluid conveying is reduced. However, the valve core in the quick connector is of a conical surface structure, the butt joint sealing piece and the separation sealing piece are both exposed in the flow channel, and impurities are easily enriched in the sealing piece to influence the sealing performance; the conical surface valve core reduces the flow area and increases the flow resistance. Meanwhile, the female joint shell is sealed by two parts through a sealing element, and a possible leakage point is increased.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a large-drift-diameter dry-type quick connector.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the invention provides a large-drift-diameter dry-type quick connector which comprises a male connector and a female connector which are matched with each other; the male connector comprises a male connector shell assembly, a male connector fixed valve core assembly and a male connector movable valve core assembly; the female joint comprises a female joint shell assembly, a female joint valve core assembly and a female joint locking assembly; the male connector fixed valve core assembly comprises a fixed valve core and a fixed valve core seat; the male joint moving valve core assembly comprises a first moving valve core, a first moving valve core sealing piece, a first return spring, a second moving valve core and a second return spring; the male connector movable valve core assembly is arranged between the male connector shell assembly and the male connector fixed valve core assembly; the fixed valve core seat is arranged at the central position of the male joint channel, the fixed valve core is arranged at the central position of the fixed valve core seat, the first reset spring is arranged outside the fixed valve core, one end of the first reset spring is connected with the first movable valve core, the other end of the first reset spring is connected with the fixed valve core seat, the first movable valve core sealing element is arranged on the inner surface of the top end of the first movable valve core, the top end of the first movable valve core is in the direction of being connected with the female joint, the second reset spring is arranged inside the first movable valve core and is connected with the second movable valve core, the first movable valve core reciprocates under the traction of the first reset spring, and the second movable valve core reciprocates under the traction of the second reset spring; the rear part of the top end of the fixed valve core is of a stepped structure, and the height difference of the stepped structure is equal to the thickness of the top end of the second movable valve core; the female joint valve core assembly comprises a valve core, a valve core seat, a valve core sleeve and a return spring; the valve core seat is arranged at the central position of the female joint channel, the valve core sleeve is arranged inside the center of the valve core seat, the tail part of the valve core is arranged inside the valve core sleeve, the reset springs are arranged outside the valve core and the valve core sleeve, and the valve core can reciprocate in the valve core sleeve under the traction of the reset springs.

Further, the male connector housing assembly comprises a male connector housing, a male connector housing seal and a male connector outer seal; the male connector shell sealing element is arranged on the inner surface of the top end of the male connector shell, wherein the top end of the male connector shell is in the direction of connection with the female connector, and the male connector external sealing element is arranged at the tail end of the male connector shell.

Furthermore, a spiral male connector shell locking curve groove is formed in the outer side of the male connector shell.

Furthermore, the surfaces of the fixed valve core and the valve core are both flat-head structures.

Furthermore, a fixed valve core positioning groove is formed in the center of the top end of the fixed valve core, a valve core positioning lug is arranged in the center of the top end of the valve core, and the fixed valve core positioning groove and the valve core positioning lug can be matched in size.

Furthermore, the fixed valve core positioning groove is in a truncated cone shape or a cylindrical shape.

Furthermore, a plurality of valve core diversion grooves are formed around the top end of the valve core.

Further, the box housing assembly includes a box housing, a box housing seal, and a box-to-box seal; the female joint shell sealing element is arranged on the inner surface of the top end of the female joint shell, wherein the top end of the female joint shell is in the direction of being connected with the male joint, and the female joint outer sealing element is arranged at the tail end of the female joint shell.

Furthermore, the female joint locking assembly is arranged outside the shell and comprises a locking outer sleeve, an operating hand wheel, a locking roller, a plurality of steel balls, a guide ring and a steel ball fixing ring; the steel ball locking device is characterized in that a circular groove with a semicircular cross section is formed in the outer portion of the shell, the steel ball is arranged in the circular groove, the steel ball fixing ring is arranged on the outer side of the steel ball and used for fixing the position of the steel ball, and the guide ring is arranged at the contact position of the locking outer sleeve and the shell.

Furthermore, the operating hand wheel and the locking outer sleeve are locked through a pin shaft structure, the locking roller is arranged on the inner side wall of the top end of the locking outer sleeve, and the top end of the locking outer sleeve is in the direction connected with the male connector.

The invention achieves the following beneficial effects:

1. the surfaces of the male connector and the female connector are flat-head structures, positioning grooves and positioning bumps for preventing radial displacement are arranged at the front ends of the fixed valve core and the valve core, a plurality of seals are formed on the valve core structures before, during and after butt joint, all sealing pieces are not in contact with flowing working media all the time, internal circulation is smooth, impurity resistance can be effectively improved, and liquid leakage can be avoided.

2. The accurate and quick butt joint between the male joint and the female joint is realized through the multi-section type curve groove on the male joint and the locking roller on the female joint, meanwhile, the butt joint and the unlocking process are simplified by combining the steel ball type rotating mechanism, and the field operation efficiency and the operability are high.

3. Valve core guiding grooves are formed in the circumference of the valve core of the female joint, the radial displacement of the valve core is restrained, the overall flow resistance is reduced, and the flow coefficient is improved.

Drawings

FIG. 1 is a cross-sectional view of the male/female joint of the large-bore dry quick connector of the present invention after it is mated and locked;

FIG. 2 is a cross-sectional view of the male connector of the large-bore dry quick connector of the present invention;

FIG. 3 is a sectional structural view of the female joint of the large-bore dry quick connector of the present invention;

FIG. 4 is a schematic structural view of the male connector housing of the large-bore dry quick connector of the present invention;

FIG. 5 is a schematic view of the internal fixed valve core of the male joint of the large-bore dry quick connector of the present invention;

FIG. 6 is a schematic view of the internal valve core structure of the female joint of the large-bore dry-type quick joint of the present invention.

As shown in fig. 1 to 6, a male connector housing assembly 1, a male connector fixing valve core assembly 2, a male connector moving valve core assembly 3, a female connector housing assembly 4, a female connector valve core assembly 5, a female connector locking assembly 6;

a male joint housing 11, a male joint housing seal 12, a male joint outer seal 13, a fixed valve core 21, a fixed valve core seat 22, a first movable valve core 31, a first movable valve core seal 32, a first return spring 33, a second movable valve core 34, a second return spring 35;

the device comprises a female joint shell 41, a female joint shell sealing element 42, a female joint external sealing element 43, a valve core 51, a valve core seat 52, a valve core sleeve 53, a return spring 54, a locking outer sleeve 61, an operating hand wheel 62, a locking roller 63, a steel ball 64, a guide ring 65 and a steel ball fixing ring 66;

the male connector housing locks the curved slot 111, fixes the valve core positioning slot 211, the valve core guiding slot 511, and the valve core positioning bump 512.

Detailed Description

To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1 to 4, the present invention provides a dry quick coupling with a large bore, which includes a male coupling (as shown in fig. 2) and a female coupling (as shown in fig. 3). Specifically, the male joint is provided with a male joint shell component 1, a fixed valve core component 2 and a movable valve core component 3; a first channel penetrating between the front end and the rear end of the whole male joint is formed between the fixed valve core assembly 2 and the movable valve core assembly 3;

the male connector housing assembly 1 comprises a male connector housing 11, a male connector housing seal 12 and a male connector outer seal 13; a locking curve groove 111 is arranged outside the shell 11, and a fixed valve core assembly 2 and a movable valve core assembly 3 are arranged in an inner cavity; the fixed valve core assembly 2 comprises a fixed valve core 21 and a fixed valve core seat 22, and the rear part of the fixed valve core assembly is fixed through a retaining ring; the shift spool assembly 3 includes a first shift spool 31, a first shift spool seal 32, a first return spring 33, a second shift spool 34, a second return spring 35; the first return spring 33 is positioned between the fixed valve core seat 22 and the first movable valve core 31, and the first movable valve core 31 can perform reciprocating linear motion in the first channel under elastic support; the second moving valve spool 34 is located inside the first moving valve spool 31, and under the action of the second return spring 35, the second moving valve spool 34 performs small linear reciprocating motion relative to the first moving valve spool 31 in the first passage; the male connector realizes a self-sealing function through the male connector shell sealing part 12 and the first movable valve core sealing part 32 on the first movable valve core; the male connector realizes external sealing to the external sealing piece 13 through the male connector at the rear part;

the female joint is provided with a female joint shell assembly 4, a female joint valve core assembly 5 and a female joint locking assembly 6; a second channel penetrating through the whole female joint between the front end and the rear end is formed between the female joint shell assembly 4 and the female joint valve core assembly 5;

the box housing assembly 4 includes a box housing 41, a box housing seal 42, and a box-to-box outer seal 43; the outside of the female joint housing 41 is provided with an annular groove with a semicircular cross section for mounting a group of steel balls 64 which are arranged along the circumferential direction and used for locking the rotation of the assembly; a female joint valve core assembly 5 is arranged in an inner cavity of the female joint shell 41, and the valve core 51 performs reciprocating linear motion in the second channel under the support of the valve core seat 52 and the valve core sleeve 53 and the action of the return spring 54; a female joint locking assembly 6 is arranged outside the female joint shell 41, a locking outer sleeve 61 and an operating hand wheel 62 are locked through a pin shaft and freely rotate along the circumferential direction under the action of a steel ball 64, a guide ring 65 and a steel ball fixing ring 66, and a locking roller 63 is embedded on the locking outer sleeve 61, is matched with a male joint shell locking curve groove 111 and slides along the curve groove;

based on the structural improvement of the large-bore dry-type quick coupling, when the male coupling and the female coupling are butted, an operator holds the operating hand wheel 62 to move the male coupling and the female coupling relatively along the axis, so that the locking roller 63 of the female coupling contacts the locking curve groove 111 of the male coupling shell, the first movable valve core 31 contacts the female coupling shell 41, and the fixed valve core 21 contacts the valve core 51; an operator operates the hand wheel 62 to rotate clockwise, the locking roller 63 of the female joint moves along the slide way in the locking curve groove 111 of the male joint shell to enable the male joint and the female joint to move relatively, and the male joint moving valve core assembly 3 and the female joint valve core assembly 5 retreat to the rear ends of the respective first channel and the second channel respectively, so that the first channel is communicated with the second channel; the male joint housing 11 and the female joint housing 41 are sealed from the outside by a male joint housing seal 12; when the locking roller 63 moves to the tail end of the curved groove along the locking curved groove 111, the male connector and the female connector are butted and locked by hearing the 'snap', the locking state is stable, and the first channel is completely communicated with the second channel.

During the process of butting the male joint and the female joint, the female joint housing 41 pushes the first moving valve core 31 to retreat backwards, the second moving valve core 34 is kept fixed under the action of the second return spring 35, and when the first moving valve core sealing piece 32 and the female joint housing sealing piece 42 on the first moving valve core 31 and the female joint housing 41 completely enter the outer circumferential surface of the second moving valve core 34, the second moving valve core 34 retreats backwards along with the first moving valve core 31 and the female joint housing 41 until the first channel and the second channel are completely opened; after the channel is completely opened, the first movable valve core sealing piece 32 and the female joint shell sealing piece 42 are not exposed in the flowing channel of the working medium, and the pressure resistance and the impurity resistance are better.

When the male connector and the female connector need to be separated, an operator holds the operating hand wheel 62 and rotates the hand wheel in the anticlockwise direction, and the locking roller 63 of the female connector moves along the slide way in the locking curve groove 111 of the male connector shell, so that the male connector and the female connector are separated; in the process that the female connector retreats backwards, under the action of the first return spring 33, the male connector moving valve core assembly 3 returns to the initial sealing position (as shown in fig. 2) along with the female connector shell, and the male connector is closed to realize self sealing; the female joint valve core 51 returns to the initial sealing position (as shown in fig. 3) under the action of the return spring 54, the female joint is closed, and self sealing is realized;

in the process of separating the male joint from the female joint, under the action of the first return spring 33 and the return spring 54, the first moving valve core 31, the second moving valve core 34 and the female joint housing 41 synchronously perform the return movement; when the second moving valve core 34 contacts the fixed valve core 21, the second moving valve core is fixed, and the first moving valve core 31 and the female joint housing 41 continue to perform the resetting motion synchronously; after the sealing element 32 on the first movable valve core 31 slides from the second movable valve core 34 to the fixed valve core 21, the male joint is closed, and self-sealing is realized; the seal 42 on the female connector housing 41 slides from the second movable spool 34 to the fixed spool 21 and then to the spool 51, and the female connector closes to self-seal.

Example 2

As shown in fig. 1-4, the male and female connectors are mated and locked by sliding the locking rollers 63 on the female connector locking assembly 6 within the curved grooves 111 on the male connector housing 11; the female joint locking assembly 6 realizes the smooth rotation of the operating hand wheel 62 through a group of steel balls 64, a guide ring 65 and a steel ball fixing ring 66 in the circumferential direction; the guide ring 65 completes circumferential support of the locking assembly, and the steel ball 64 is tightly pressed in the circular groove by the steel ball fixing ring 66 to prevent the steel ball 64 from falling off;

the other structures are the same as those of embodiment 1, and are not described herein again.

Example 3

As shown in fig. 4, a male connector housing locking curved groove 111 for locking the male connector and the female connector is arranged on the male connector housing 11, and is used for restricting the movement track of the locking roller 63 and realizing the butt joint of the male connector and the female connector; the male connector housing locking curve slot 111 is a multi-section curve, and the curve can be expanded into a horizontal line section, a multi-section obliquely downward straight line section, a multi-section obliquely upward straight line section and a vertical line section, and can also be other types of curve sections in the same direction;

the other structures are the same as those of embodiment 1, and are not described herein again.

Example 4

As shown in fig. 5 and 6, the front end of the male joint fixed valve core 21 is provided with a fixed valve core positioning groove 211, which cooperates with a valve core positioning bump 512 at the front end of the female joint valve core 51 to restrain the radial displacement of the female joint valve core 51; the positioning groove is in a truncated cone shape or a cylindrical shape, the convex block is positioned on the female connector valve core 51, the groove is positioned on the male connector fixed valve core 21, and the positions of the convex block and the groove can be exchanged.

The other structures are the same as those of embodiment 1, and are not described herein again.

Example 5

As shown in fig. 6, a valve core diversion groove 511 and a valve core positioning bump 512 are arranged on the valve core of the female joint; the valve core positioning protrusion 512 is described in embodiment 4, and is not described herein;

the valve core diversion groove 511 is three bulges in the circumferential direction, the front end of the valve core diversion groove is conical, and the valve core 51 is matched with the conical surface of the female joint shell 41 after being restored to the proper position, so that the axial position constraint of the valve core 51 is realized; the valve core diversion groove 511 is arranged to increase the flow area of the second channel and reduce the flow resistance;

the other structures are the same as those of embodiment 1, and are not described herein again.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.