A valve quick connector

Abstract

The present invention discloses a valve quick connector, including a lock structure, a valve core structure and a connection structure, wherein the lock structure is connected to the connection structure, the valve core structure can be axially moved and positioned between the lock structure and the connection structure, the lock structure includes a snap seat and a push sleeve assembled in the snap seat, the connection structure includes a positioning seat connected to the snap seat, the valve core structure includes a valve core body, the outer cylindrical surface of the valve core body is provided with a guide groove extending along the axial direction, a guide ball is provided in the positioning seat, when the valve core body is rotated, the guide ball is positioned in the guide groove, so that the valve core body moves axially between the positioning seat and the snap seat. The present invention provides a valve quick connector, which converts the rotational movement of the valve core body into axial movement, and realizes the function of opening and closing the valve by changing the axial position of the valve core body.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline connection, in particular to a valve quick connector. Background Art

[0002] A quick connector is a connector that can connect or disconnect pipelines without the need for tools. It is mainly used for the quick installation of liquid or gas pipelines. When an ordinary quick connector is used in a gas pipeline, one end of the quick connector is connected to a terminal tool or a hose through a sub-body. When the sub-body needs to be pulled out, the pipeline at the sub-body end is in a high-pressure state, and it is difficult to pull out the sub-body, requiring a lot of force. At the moment of pulling out, the high pressure in the pipe will flush the sub-body out, and the sub-body is likely to fly out and hit people or objects around, causing safety hazards. In addition, the quick connector with a valve in the prior art also has the following problems: First, the existing quick connector with a valve is a split structure, usually adding a valve to an ordinary quick connector, which is large in size, difficult to operate to open and close the valve, and inconvenient to use. Summary of the invention

[0003] The purpose of the present invention is to provide a valve quick connector, which converts the rotational movement of the valve body into axial movement, realizes the function of opening and closing the valve by changing the axial position of the valve body, and solves the problem of difficult operation and inconvenient use of the quick connector opening and closing valve in the prior art.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is: a valve quick connector, including a locking structure, a valve core structure and a connecting structure, the locking structure is connected to the connecting structure, the valve core structure can axially move and be positioned between the locking structure and the connecting structure, the locking structure includes a spring seat and a push sleeve assembled in the spring seat, the connecting structure includes a positioning seat connected to the spring seat, the valve core structure includes a valve body, a guide groove extending axially obliquely is provided on the outer cylindrical surface of the valve body, a guide ball is provided in the positioning seat, when the valve body is rotated, the guide ball is positioned in the guide groove, so that the valve body moves axially between the positioning seat and the spring seat.

[0005] The present invention adopts the above technical solution. When the positioning seat is rotated, the cooperation of the guide ball and the guide groove drives the valve body to rotate. When the valve body rotates, due to the structure of the guide groove tilted along the axial direction, the valve body has an axial displacement, thereby driving the valve body to move axially between the positioning seat and the snap seat; during the axial movement, the valve body is used to control the opening and closing of the quick connector. The push sleeve is used to access the sub-body, and the positioning seat is used to access the fluid source through the joint.

[0006] Furthermore, a pressure relief surface and a sealing surface are formed on the contact surface between the valve body and the push sleeve, and a first O-ring is provided on the outer cylindrical surface of the push sleeve. The valve body moves axially so that the push sleeve and the first O-ring switch between the pressure relief surface and the sealing surface. When the end face of the push sleeve is located at the sealing surface, the first O-ring is sealed with the inner wall of the valve body, and when the end face of the push sleeve is located at the pressure relief surface, a certain gap exists between the first O-ring and the inner wall of the valve body, and the internal fluid pressure can be relieved.

[0007] Furthermore, the valve core structure includes a valve core, a valve core spring, a valve core gasket and a valve seal. The valve core gasket is arranged on the step surface of the valve body. The valve core is provided with a valve core rod and a valve core chip. The valve core rod passes through the through hole of the valve core gasket. The valve seal is arranged on the step surface inside the valve body. The valve core spring is sleeved on the valve core rod, and the two ends are respectively against the valve core gasket and the open steel ring on the valve core rod. The valve core chip and the valve seal are on the same side of the valve core gasket. The elastic force of the valve core spring causes the valve core to press the valve seal. When the valve body moves to the point where the valve core spring is compressed, the valve core releases the valve seal and opens the quick connector. The steel ring groove and the open steel ring fix the valve core spring. When the valve core rod is pushed by force, the valve core chip is away from the outer end face of the valve body to release the valve seal, and the valve core spring is compressed. When the thrust on the valve core rod is cancelled, the valve core spring provides elastic force to reset the valve chip and press the valve seal to maintain the seal of the joint.

[0008] Furthermore, the inner wall of the push sleeve is provided with a push washer and a push spring, and the push spring is arranged between the push washer and the inner cavity of the valve body; the push washer is used to push the valve core rod when the valve body is close to the snap seat. When the valve body moves toward the snap seat, the push sleeve enters the inner cavity of the valve body, and the push washer presses against the valve core rod to push the valve chip open, thereby conducting the quick connector; when the valve body is away from the snap seat, the push washer releases the valve core rod, and the valve core spring resets, pushing the valve core rod to pull the valve chip to squeeze the valve seal to seal the quick connector; the push spring is used to balance the thrust of the push sleeve on the valve body and reset the push sleeve.

[0009] Furthermore, a guide groove with a wide outer opening and a narrow inner opening is provided on the outer cylindrical surface at one end of the valve body, and is inserted and matched with the guide protrusion on the snap seat, and a valve body oblique end surface is provided at the other end of the valve body, and is in contact and matched with the oblique end surface of the positioning seat on the positioning seat. When the valve body rotates and moves axially, the guide protrusion switches between the inner wide opening and the outer wide opening, and when the guide protrusion abuts against the outer wide opening step of the guide groove, it plays a role in limiting the axial position of the valve body, and when the guide protrusion abuts against the inner narrow opening of the guide groove, the valve body is close to the snap seat.

[0010] Furthermore, the positioning seat is provided with a guide hole, and the joint sleeve is sleeved on the positioning seat to encapsulate the guide ball in the guide hole.

[0011] Furthermore, the positioning seat is provided with an inner ball groove, the outer end surface of the snap seat is provided with an outer ball groove, and the snap seat and the positioning seat are rotatably connected via a connecting ball. The connecting ball can act as a bearing, and moves in the space formed by the inner ball groove and the outer ball groove, thereby reducing the friction between the positioning seat and the snap seat.

[0012] Furthermore, the lock structure includes a snap sleeve and a sub-body snap, the snap seat is provided with an axial groove and a snap hole, the snap sleeve is sleeved on the snap seat and positioned on the axial groove by a positioning ball to make axial movement, and the snap sleeve seals the sub-body snap in the snap hole. The sub-body snap is compressed by the snap sleeve, extends into the snap hole, and is clamped on the sub-body concave ring of the sub-body, thereby clamping the sub-body.

[0013] Furthermore, the inner side of the sub-body snap button is provided with a radial protrusion, the outer side is provided with a snap button groove, the snap button seat is provided with an elastic ring groove and an elastic ring, and the elastic ring is sleeved in the snap button groove and the elastic ring groove. The radial protrusion of the sub-body snap button matches the sub-body concave ring of the sub-body; the elastic ring is elastic, and when the sub-body snap button is not pressed by the snap button sleeve, the sub-body snap button is stretched open to be separated from the sub-body concave ring, and the sub-body is detachable.

[0014] Furthermore, the sub-body snap fastener is a ball, and a conical hole is provided at the front end of the snap fastener seat. The ball is movably positioned in the conical hole, and is stuck on the sub-body concave ring of the sub-body when the ball descends. When the sub-body is inserted into the push sleeve, the edge of the sub-body concave ring pushes up the ball, and the sub-body continues to enter the push sleeve until the ball descends into the sub-body concave ring to clamp the sub-body. When the sub-body is disassembled, the snap fastener sleeve is pushed to release the ball from the sub-body concave ring, and the sub-body can be pulled out from the push sleeve.

[0015] Furthermore, the lock structure also includes a valve sleeve, the end face of the valve sleeve has a valve pressure relief port, a valve closing port and a valve opening port, and the end face of the positioning seat is provided with a positioning protrusion, and when the valve sleeve reciprocates, the positioning protrusion is positioned in the valve pressure relief port, the valve closing port and the valve opening port. When the positioning protrusion is located at the valve pressure relief port, the valve closing port and the valve opening port, respectively, the axial movement of the valve body causes the valve core to close and open the valve body, and the end face of the corresponding push sleeve is located at different positions of the valve body, so that the quick connector is in the working state of valve pressure relief, valve closing and valve opening.

[0016] Furthermore, the inner surface of the valve sleeve is provided with an axial protrusion which is sleeved on the snap sleeve, the axial protrusion and the axial inner recess of the valve sleeve are axially matched, and a lock spring is provided between the valve sleeve and the snap sleeve. The snap sleeve can move axially toward the snap sleeve, and the lock spring is used to reset the snap sleeve.

[0017] The beneficial effects achieved by the present invention are:

[0018] 1. After the valve is closed, the valve body and the push sleeve are at the pressure relief surface, and the high-pressure gas in the pipeline at the sub-body end is released through the pressure relief surface. The sub-body can be pulled out safely and labor-savingly. When the valve body and the push sleeve are at the sealing surface, the valve is opened to avoid gas leakage when the sub-body is inserted;

[0019] 2. The valve and quick connector are integrated into one structure, and the valve is opened and closed by rotating;

[0020] 3. This valve quick connector has different working states to meet different working requirements and is easy to use. Moreover, each working state has a limit position to avoid misoperation of the sub-body insertion and extraction, making it safer to use.

[0021] 4. The radial protrusion of the sub-body snap buckle of the valve quick connector of the present invention is buckled into the concave ring of the sub-body, and the inner shape of the radial protrusion is consistent with the concave ring of the sub-body. When subjected to force, the surface is in contact, the force is better and the wear resistance is better, and the service life of the product is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the decomposed structure of the present invention;

[0023] Figure 2 is a cross-sectional view of the assembly structure of the present invention in use;

[0024] Figure 3 It is a schematic diagram of the explosion structure in the present invention;

[0025] Figure 4 It is a schematic diagram of the specific structure of the buckle seat in the present invention;

[0026] Figure 5 It is a schematic diagram of the specific structure of the valve body in the present invention;

[0027] Figure 6 It is a schematic diagram of the assembly structure of the valve sleeve and the snap sleeve in the present invention;

[0028] Figure 7 It is a structural schematic diagram of the positioning seat in the present invention;

[0029] Figure 8 It is a schematic diagram of the cutaway structure of the positioning seat in the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure of the elastic ring and the sub-body snap buckle in the present invention;

[0031] Fig.10 It is a schematic diagram of the assembly structure of the valve body in the present invention;

[0032] Fig.11 It is a cross-sectional structural schematic diagram of the working state of the present invention when the sub-body is inserted, the valve is opened, and the pressure is not relieved;

[0033] Fig.12 yes Fig.11 The schematic diagram of the appearance structure of the present invention;

[0034] Fig.13 yes Fig.11 A schematic diagram of the internal connection structure of the present invention;

[0035] Fig.14 yes Fig.11 A schematic diagram of the external connection structure of the present invention;

[0036] Fig.15 It is a cross-sectional structural schematic diagram of the working state of the present invention when the sub-body is inserted, the valve is closed, and the pressure is not relieved;

[0037] Fig.16 yes Fig.15 The schematic diagram of the appearance structure of the present invention;

[0038] Fig.17 yes Fig.15 A schematic diagram of the internal connection structure of the present invention;

[0039] Fig.18 yes Fig.15 A schematic diagram of the external connection structure of the present invention;

[0040] Fig.19 It is a cross-sectional structural schematic diagram of the working state of the present invention when the sub-body is inserted, the valve is closed, and the pressure is released;

[0041] Fig. 20 yes Fig.19 The schematic diagram of the appearance structure of the present invention;

[0042] Fig.21 yes Fig.19 A schematic diagram of the internal connection structure of the present invention;

[0043] Fig. 22 yes Fig.19 A schematic diagram of the external connection structure of the present invention;

[0044] Fig.23 It is a cross-sectional structural schematic diagram of the present invention in a working state where the sub-body is separated and the valve is closed;

[0045] Fig.24 yes Fig.23 The schematic diagram of the appearance structure of the present invention;

[0046] Fig.25 yes Fig.23 A schematic diagram of the internal connection structure of the present invention;

[0047] Fig.26 yes Fig.23A schematic diagram of the external connection structure of the present invention;

[0048] Fig. 27 is a partial structural cross-sectional view of another embodiment of the present invention;

[0049] Fig.28 is a schematic cross-sectional structural diagram of a sub-body inserted and installed according to another embodiment of the present invention;

[0050] Fig.29 is a schematic cross-sectional structure diagram of another embodiment of the present invention in which a sub-body is pulled out;

[0051] Fig.30 It is a structural schematic diagram of a snap-on seat according to another embodiment of the present invention;

[0052] Fig.31 It is a schematic cross-sectional structure diagram of a snap seat according to another embodiment of the present invention.

[0053] Description of reference numerals: 10 locking structure, 11 snap seat, 12 push sleeve, 13 connecting ball, 14 snap sleeve, 15 sub-body snap, 16 elastic ring, 17 locking spring, 18 push spring, 19 positioning ball, 1A first O-ring, 1B push gasket, 1C sub-body sealing gasket, 1D sub-body sealing ring, 111 guide protrusion, 112 snap hole, 113 elastic ring groove, 114 axial groove, 115 outer ball groove, 116 tapered hole, 141 axial concave, 142 axial protrusion, 151 radial protrusion, 152 snap groove, 20 valve core structure, 21 valve body, 22 valve core, 23 valve seal, 24 valve core gasket, 25 valve core spring, 211 pressure relief surface, 212 sealing surface, 213 valve body oblique end surface, 214 guide groove, 215 guide groove, 221 valve core rod, 222 valve chip, 30 connecting structure, 31 positioning seat, 32 guide ball, 33 joint sleeve, 35 guide hole, 36 ball pin, 311 positioning seat oblique end surface, 312 positioning protrusion, 313 inner ball groove, 40 valve sleeve, 41 valve pressure relief port, 42 closed valve port, 43 open valve port, A sub-body, A1 sub-body concave ring, B air source connector. DETAILED DESCRIPTION

[0054] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0055] like Figure 1 As shown, the lock structure 10 of the valve quick connector is connected to the connection structure 30, and the internals are connected; the valve core structure 20 is located inside the connection structure 30. Figure 2As shown, the sub-body A is inserted into the locking structure 10 and sealed therewith, and the gas source connector B is sealed with the connection structure 30. The gas enters from the gas source connector B, passes through the valve core structure 20, and flows out from the sub-body A. Among them, the locking structure 10 has a snap seat 11 and a push sleeve 12, the snap seat 11 is sleeved on the outside of the push sleeve 12, the push sleeve 12 has an outer step, the snap seat 11 has an inner step, the push sleeve 12 is inserted into the snap seat 11 from one end thereof, the outer step of the push sleeve 12 abuts against the inner step of the snap seat 11, and the sub-body A is inserted into the push sleeve 12. A sub-body sealing gasket 1C and a sub-body sealing ring 1D are provided inside the push sleeve 12. The sub-body sealing gasket 1C is used to abut the end of the sub-body A, and the sub-body sealing ring 1D is used to seal the sub-body A and the push sleeve 12.

[0056] Reference Figures 1 to 26 As shown, a valve quick connector includes a locking structure 10, a valve core structure 20 and a connecting structure 30. The locking structure 10 is connected to the connecting structure 30. The valve core structure 20 can axially move and be positioned between the locking structure 10 and the connecting structure 30. The locking structure 10 includes a snap seat 11 and a push sleeve 12 assembled in the snap seat 11. The connecting structure 30 includes a positioning seat 31 connected to the snap seat 11. The valve core structure 20 includes a valve body 21. The outer cylindrical surface of the valve body 21 is provided with a guide groove 215 extending obliquely along the axial direction. A guide ball 32 is provided in the positioning seat 31. When the valve body 21 is rotated, the guide ball 32 is positioned in the guide groove 215, so that the valve body 21 moves axially between the positioning seat 31 and the snap seat 11.

[0057] In this embodiment, the guide groove 215 is composed of an inclined groove and a flat groove which are connected to each other as a whole.

[0058] A pressure relief surface 211 and a sealing surface 212 are formed on the contact surface between the valve body 21 and the push sleeve 12. A first O-ring 1A is provided on the outer cylindrical surface of the push sleeve 12. The valve body 21 moves axially so that the push sleeve 12 and the first O-ring 1A switch between the pressure relief surface 211 and the sealing surface 212. The inner diameter of the pressure relief surface 211 is greater than the inner diameter of the sealing surface 212.

[0059] The valve core structure 20 includes a valve core 22, a valve core spring 25, a valve core gasket 24 and a valve seal 23. The valve core gasket 24 is arranged on the step surface of the valve body 21. The valve core 22 is provided with a valve core rod 221 and a valve core chip 222. The valve core rod 221 passes through the through hole of the valve core gasket 24. The valve seal 23 is arranged on the step surface inside the valve body 21. The valve core spring 25 is sleeved on the valve core rod 221, and the two ends are respectively against the valve core gasket 24 and the open steel ring 26 on the valve core rod 221. The valve core chip 222 and the valve seal 23 are on the same side of the valve core gasket 24. The elastic force of the valve core spring 25 causes the valve core 22 to press the valve seal 23.

[0060] The inner wall of the push sleeve 12 is provided with a push washer 1B and a push spring 18 , and the push spring 18 is arranged between the push washer 1B and the inner cavity of the valve body 21 ; the push washer 1B is used to push the valve core rod 221 when the valve body 21 is close to the snap seat 11 .

[0061] A guide groove 214 with a wide outer opening and a narrow inner opening is provided on the outer cylindrical surface of one end of the valve body 21, and is inserted and matched with the guide protrusion 111 on the snap seat 11. A valve body oblique end surface 213 is provided on the other end of the valve body 21, and is in contact and matched with the oblique end surface 311 of the positioning seat 31. Figure 5 As shown, one end of the valve body 21 is provided with three sections of valve body oblique end faces 213 connected in sequence, as shown in FIG. Figure 8 As shown, one end of the positioning seat 31 is provided with three sections of positioning seat oblique end surfaces 311 which are connected in sequence and match with the valve body oblique end surface 213. The valve body oblique end surface 213 and the positioning seat oblique end surface 311 each have a straight protrusion, an inclined surface and a straight concave bottom portion which are connected in sequence. When the valve body 21 rotates relative to the positioning seat 31, the straight protrusion, the inclined surface and the straight concave bottom portion contact and match with each other, so that the valve body 21 moves in the axial direction relative to the positioning seat 31.

[0062] The positioning seat 31 is provided with a guide hole 35 , and the joint sleeve 33 is sleeved on the positioning seat 31 to encapsulate the guide ball 32 in the guide hole 35 . The guide ball 32 is installed in the guide hole 35 through a ball pin 36 .

[0063] The positioning seat 31 is provided with an inner ball groove 313 , and the outer end surface of the snap seat 11 is provided with an outer ball groove 115 . The snap seat 11 and the positioning seat 31 are rotatably connected via the connecting ball 13 .

[0064] The lock structure 10 includes a snap sleeve 14 and a sub-body snap 15. The snap seat 11 is provided with an axial groove 114 and a snap hole 112. The snap sleeve 14 is mounted on the snap seat 11 and is positioned on the axial groove 114 by a positioning ball 19 to perform axial movement. The snap sleeve 14 encapsulates the sub-body snap 15 in the snap hole 112.

[0065] The inner side of the sub-body snap button 15 is provided with a radial protrusion 151 and the outer side is provided with a snap button groove 152 . The snap button seat 11 is provided with an elastic ring groove 113 and an elastic ring 16 . The elastic ring 16 is sleeved in the snap button groove 152 and the elastic ring groove 113 .

[0066] When the sub-body A needs to be locked, the snap sleeve 14 presses the sub-body snap 15;

[0067] When the sub-body A needs to be disassembled, the snap sleeve 14 moves away from the sub-body snap 15, and the sub-body snap 15 moves radially outward to release the sub-body concave ring A1, so that the sub-body A can be disassembled.

[0068] Among them, the radial protrusion 151 of the sub-body spring buckle 15 is buckled into the sub-body concave ring A1, and the inner shape of the radial protrusion 151 is consistent with the concave ring A1 on the sub-body A. When subjected to force, the surface is in contact, the force is better, the wear resistance is better, and the product service life is longer.

[0069] The locking structure 10 also includes a valve sleeve 40, the end face of the valve sleeve 40 has a valve pressure relief port 41, a valve closing port 42 and a valve opening port 43, and the end face of the positioning seat 31 is provided with a positioning protrusion 312. When the valve sleeve 40 rotates back and forth, the positioning protrusion 312 is positioned in the valve pressure relief port 41, the valve closing port 42 and the valve opening port 43.

[0070] The valve pressure relief port 41 is located in the positioning protrusion 312 of the positioning seat 31. At this time, the valve is closed, the sub-body end in the quick connector is in a connected state with the outside, and the sub-body A can be inserted or pulled out;

[0071] The closed valve port 42 is located in the positioning protrusion 312, the valve is closed, the sub-body end in the quick connector is in a sealed state with the outside, and the sub-body A has been inserted and cannot be pulled out;

[0072] The valve opening 43 is located in the positioning protrusion 312, the valve is opened, and the font end in the quick connector is in a sealed state with the outside. At this time, the font A has been inserted and cannot be pulled out.

[0073] Three different working states meet different working requirements, are easy to use, and can also avoid misoperation of inserting and removing the sub-body, making it safer to use.

[0074] The inner surface of the valve sleeve 40 is provided with an axial protrusion 142 which is sleeved on the snap sleeve 14 . The axial protrusion 142 and the axial recess 141 of the valve sleeve 40 are axially matched. A lock spring 17 is provided between the valve sleeve 40 and the snap sleeve 14 .

[0075] When the first O-ring 1A is located on the sealing surface 212 of the valve body 21, the outer wall of the push sleeve 12 is sealed with the inner wall of the valve body 21;

[0076] When the first O-ring 1A is located on the pressure relief surface 211, there is a gap between the outer wall of the push sleeve 12 and the inner wall of the valve body 21, and the gas can flow through the gap to the outside of the quick connector to relieve pressure.

[0077] The valve is closed, and the pressure relief surface 211 of the valve body 21 is located at the position of the first O-ring 1A on the push sleeve 12. The high-pressure gas in the pipeline at the end A of the sub-body is released through the pressure relief surface 211, and the sub-body can be pulled out safely and labor-savingly.

[0078] The valve is opened, and the sealing surface 212 of the valve body 21 is located at the position of the first O-ring 1A on the push sleeve 12 .

[0079] Push the sleeve 40 toward the end A of the sub-body, so that the valve opening 43 is separated from the positioning protrusion 312 of the positioning seat 31, and rotate the valve sleeve 40 until the positioning protrusion 312 extends into the valve closing port 42. The valve quick connector is in a state where the valve closes the sub-body end and is sealed. Figures 11 to 18 The valve sleeve 40 is rotated to drive the snap sleeve 14 and the snap seat 11 to rotate together, and the valve body 21 rotates together and moves axially at the same time, which has the following characteristics:

[0080] Sub-body A is still in a locked state; the end face of the valve core rod 221 of the valve core 22 is against the push gasket 1B, the valve body 21 moves toward the axis to press the valve seal 23, and the valve is closed; the sealing surface 212 of the valve body 21 is sealed with the first O-ring 1A of the push sleeve 12, and the inside of the sub-body end is in a sealed state with the outside world; the inclined surface 311 of the positioning seat 31 is in contact with the inclined surface 213 of the valve body 21, the guide ball 32 is located in the middle of the inclined groove of the guide groove 215 of the valve body 21, and the guide protrusion 111 of the snap seat 11 is located in the middle of the narrow mouth of the guide groove 214 of the valve body 21; the closed valve port 42 of the valve sleeve 40 is located in the positioning protrusion 312 of the positioning seat 31.

[0081] Push the valve sleeve 40 toward the end A of the sub-body to separate the valve closing port 42 from the positioning protrusion 312 of the positioning seat 31, and rotate the valve sleeve 40 until the positioning protrusion 312 extends into the valve closing pressure relief port 41. At this time, the quick connector is in the valve closing sub-body end open state. Figures 19 to 22 The valve sleeve 40 is rotated to drive the snap sleeve 14 and the snap seat 11 to rotate together, and the valve body 21 rotates together and moves axially at the same time, which has the following characteristics:

[0082] The valve core structure 20 moves as a whole toward the direction of the air source connector B, and the end face of the valve core rod 221 of the valve core 22 leaves the push washer 1B. At this time, through the action of the valve core spring 25, the valve core 222 presses the valve seal 23 against the end face of the valve body 21 to play a sealing role. The pressure relief surface 211 of the valve body 21 fits with the first O-ring 1A of the push sleeve 12, with a gap between them. The interior of the sub-body end A is in a connected state with the outside world, and the high pressure inside the sub-body end be removed; the straight protrusion of the oblique end surface 311 of the positioning seat 31 abuts against the straight concave portion of the oblique end surface 213 of the valve body 21, the guide ball 32 is located at the oblique groove end of the guide groove 215 of the valve body 21, and the guide protrusion 111 of the snap seat 11 abuts against the wide-mouth step of the guide groove 214 of the valve body 21; the valve closing pressure relief port 41 of the valve sleeve 40 is located in the positioning protrusion 312 of the positioning seat 31, and the sub-body is in a removable state.

[0083] The valve closing pressure relief port 41 of the valve sleeve 40 is a deep port, and more space is separated between the valve sleeve 40 and the snap sleeve 14. The snap sleeve 14 is moved toward the valve sleeve 40, and the small diameter end of the snap sleeve 14 leaves the sub-body snap 15, and the sub-body snap 15 bounces upward to release the sub-body concave ring A1 of the sub-body A; the sub-body A is pulled outward, and the push spring 18 also has the elastic force to push the push sleeve 12 out; the sub-body snap 15 moves radially outward, and the inner wall of the snap sleeve 14 has enough space for the sub-body snap 15 to move radially outward and disengage from the sub-body concave ring A1, and the sub-body A is pulled out. The valve quick connector is in a sub-body detached state, such as Figure 23 to Figure 26 As shown, it has the following characteristics:

[0084] The outer cylindrical surface of the push sleeve 12 holds the inner side of the radial protrusion 151 of the sub-body snap button 15, and the inner step of the snap button sleeve 14 abuts against the side of the sub-body snap button 15, so that the snap button sleeve 14 cannot move axially, and the valve sleeve 40 cannot move axially; the straight protrusion of the inclined end surface 311 of the positioning seat 31 abuts against the straight concave portion of the valve body inclined end surface 213 of the valve body 21, the guide ball 32 is located at the inclined groove end of the guide groove 215 of the valve body 21, and the guide protrusion 111 of the snap button seat 11 abuts against the wide-mouth step of the guide groove 214 of the valve body 21; the valve closing pressure relief port 41 of the valve sleeve 40 is located in the positioning protrusion 312 of the positioning seat 31, the valve sleeve 40 cannot rotate, and the valve cannot be opened before the sub-body A is inserted.

[0085] The process of the valve quick connector of the present invention entering the working state from the state of disengaging the sub-body, that is, inserting the sub-body, is as follows:

[0086] Insert the sub-body A, push the push sleeve 12 away from the sub-body snap button 15, and the sub-body snap button 15 is snapped into the sub-body concave ring A1 under the elastic force of the elastic ring 16;

[0087] The side of the sub-body spring buckle 15 is separated from the inner step surface of the spring buckle sleeve 14. Under the elastic force of the lock spring 17, the spring buckle sleeve 14 moves axially outward, and the inner step surface of the spring buckle sleeve 14 abuts against the outer step surface of the spring buckle seat 11.

[0088] The valve sleeve 40 is moved outward to separate the valve closing pressure relief port 41 from the positioning protrusion 312 of the positioning seat 31;

[0089] The valve sleeve 40 is rotated until the valve opening 43 is located in the positioning protrusion 312, and the valve is opened.

[0090] During the insertion of the sub-body A, the rotating valve sleeve 40 does not need to pass through the closing valve port 42 and the positioning protrusion 312 .

[0091] When the positioning seat 31 is rotated so that its positioning protrusion 312 extends into the valve closing pressure relief port 41, the valve closing port 42 and the valve opening port 43 of the valve sleeve 40, the positioning seat 31 drives the valve body 21 to rotate, and the valve body 21 moves axially between the positioning seat 31 and the snap seat 11. When the positioning protrusion 312 is located at the valve opening 43, the pushing gasket 1B of the pushing sleeve 12 abuts against the valve core rod 221 to push the valve core 222 open, and the gas enters the inner cavity of the valve body 21 from the gas source connector B and flows out from the sub-body A; when the positioning protrusion 312 is located at the valve closing port 42, the pushing gasket 1B of the pushing sleeve 12 is separated from the valve core rod 221, and the valve core 222 squeezes the valve seal 23 through the action of the valve core spring 25 and the gas source fluid pressure until it is sealed; when the positioning protrusion 312 is located at the valve closing pressure relief port 41, the first O-ring 1A on the end face of the pushing sleeve 12 is located at the pressure relief surface 211, and the pressure inside the joint is relieved through the gap between the first O-ring 1A and the pressure relief surface 211, so that the sub-body A can be removed.

[0092] Reference Figures 27 to 31 As shown, the present invention discloses another embodiment, which is different from the above embodiment in that the sub-body snap 15 is a ball, and a conical hole 116 is provided at the front end of the snap seat 11. The ball is movably positioned in the conical hole 116 and is stuck on the sub-body concave ring A1 of the sub-body A when the ball descends.

[0093] In summary, the present invention has been made into actual samples and tested for multiple times as described in the specification and the drawings. From the results of the test, it can be proved that the present invention can achieve its intended purpose, and its practical value is beyond doubt. The above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention in any form. Any person with ordinary knowledge in the technical field, if it does not depart from the scope of the technical features of the present invention, uses the equivalent embodiments of the technical content disclosed by the present invention to make partial changes or modifications, and does not depart from the technical features of the present invention, all still fall within the scope of the technical features of the present invention.

Claims

1. A valve quick connector, comprising a locking structure (10), a valve core structure (20) and a connecting structure (30), wherein the locking structure (10) is connected to the connecting structure (30), and the valve core structure (20) can be axially moved and positioned between the locking structure (10) and the connecting structure (30), characterized in that: The locking structure (10) comprises a snap seat (11) and a push sleeve (12) assembled in the snap seat (11); the connecting structure (30) comprises a positioning seat (31) connected to the snap seat (11); the valve core structure (20) comprises a valve body (21); a guide groove (215) extending obliquely along the axial direction is provided on the outer cylindrical surface of the valve body (21); a guide ball (32) is provided in the positioning seat (31); when the valve body (21) is rotated, the guide ball (32) is positioned in the guide groove (215), so that the valve body (21) moves axially between the positioning seat (31) and the snap seat (11); the valve body (21) and the push sleeve (12) are connected to each other. 2) is formed with a pressure relief surface (211) and a sealing surface (212); the outer cylindrical surface of the push sleeve (12) is provided with a first O-ring (1A); the valve body (21) moves axially so that the push sleeve (12) and the first O-ring (1A) switch between the pressure relief surface (211) and the sealing surface (212); the outer cylindrical surface of one end of the valve body (21) is provided with a guide groove (214) with a wide opening on the outside and a narrow opening on the inside, which is inserted and matched with the guide protrusion (111) on the snap seat (11); the other end of the valve body (21) is provided with a valve body oblique end surface (213) which contacts and matches with the positioning seat oblique end surface (311) on the positioning seat (31); The positioning seat (31) is provided with a guide hole (35), and the joint sleeve (33) is sleeved on the positioning seat (31) to encapsulate the guide ball (32) in the guide hole (35); the locking structure (10) comprises a snap sleeve (14) and a sub-body snap (15); the snap seat (11) is provided with an axial groove (114) and a snap hole (112); the snap sleeve (14) is sleeved on the snap seat (11) and is positioned on the axial groove (114) by the positioning ball (19) to perform axial movement; the snap sleeve (14) encapsulates the sub-body snap (15) in the snap hole (112); the locking structure (10) also comprises a valve sleeve (40); the valve The end surface of the sleeve (40) has a valve pressure relief port (41), a valve closing port (42) and a valve opening port (43); the end surface of the positioning seat (31) is provided with a positioning protrusion (312); when the valve sleeve (40) reciprocates, the positioning protrusion (312) is positioned in the valve pressure relief port (41), the valve closing port (42) and the valve opening port (43); the inner surface of the valve sleeve (40) is provided with an axial protrusion (142) which is sleeved on the snap sleeve (14); the axial protrusion (142) and the axial recess (141) of the valve sleeve (40) are axially matched; a locking spring (17) is provided between the valve sleeve (40) and the snap sleeve (14).

2. The valve quick connector according to claim 1, characterized in that: The valve core structure (20) comprises a valve core (22), a valve core spring (25), a valve core gasket (24) and a valve seal (23); the valve core gasket (24) is arranged on a step surface of a valve body (21); the valve core (22) is provided with a valve core rod (221) and a valve core chip (222); the valve core rod (221) passes through a through hole of the valve core gasket (24); the valve seal (23) is arranged on a step surface inside the valve body (21); the valve core spring (25) is sleeved on the valve core rod (221) and its two ends are respectively against the valve core gasket (24) and the open steel ring (26) on the valve core rod (221); the valve core chip (222) and the valve seal (23) are on the same side of the valve core gasket (24); the elastic force of the valve core spring (25) causes the valve core (22) to press against the valve seal (23).

3. The valve quick connector according to claim 2, characterized in that: The inner wall of the push sleeve (12) is provided with a push gasket (1B) and a push spring (18), and the push spring (18) is arranged between the push gasket (1B) and the inner cavity of the valve body (21); the push gasket (1B) is used to push the valve core rod (221) when the valve body (21) is close to the snap seat (11).

4. The valve quick connector according to claim 1, characterized in that: The positioning seat (31) is provided with an inner ball groove (313), and the outer end surface of the snap seat (11) is provided with an outer ball groove (115). The snap seat (11) and the positioning seat (31) are rotatably connected via a connecting ball (13).

5. The valve quick connector according to claim 1, characterized in that: The sub-body snap buckle (15) is provided with a radial protrusion (151) on the inner side and a snap buckle groove (152) on the outer side; the snap buckle seat (11) is provided with an elastic ring groove (113) and an elastic ring (16); the elastic ring (16) is sleeved in the snap buckle groove (152) and the elastic ring groove (113).

6. The valve quick connector according to claim 1, characterized in that: The sub-body snap button (15) is a ball, and a conical hole (116) is provided at the front end of the snap button seat (11). The ball is movably positioned in the conical hole (116) and is stuck on the sub-body concave ring (A1) of the sub-body (A) when the ball descends.

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