Stop quick connector of linkage ball valve

Abstract

The utility model relates to the technical field of linkage ball valves, and discloses a linkage ball valve stop quick connector which comprises two linkage ball valve stop quick connectors which are in butt joint with each other. The linkage ball valve stop quick connector comprises a valve shell and a ball body installed in the valve shell. According to the linkage ball valve stop quick connector, the locking groove and the locking assembly are arranged, the two same linkage ball valve stop quick connectors are in butt joint and rotate by 45 degrees, the positions of two arrows on the linkage ball valve stop quick connectors coincide, a switch rotating wrench is rotated by 90 degrees, at the moment, a ball body is completely opened, and connection is successful; the outer circle face of the switch rotating wrench jacks up the anti-reverse-rotation levers, the anti-reverse-rotation levers are clamped in the two corresponding locking grooves, the ball valve is prevented from reverse rotation in the connecting and liquid passing state, liquid leakage of the connector is avoided, and when the connector needs to be disconnected, the ball valve can be disconnected only by rotating the switch rotating wrench of the ball valve to the closing position of the ball valve firstly.

Description

Technical Field

[0001] This utility model relates to the field of linkage ball valve technology, specifically to a quick-connect coupling for linkage ball valve shut-off. Background Technology

[0002] The quick-connect ball valve stop coupling is a pipe connection device used for the quick connection of two pipes. It is mainly used to control the flow of media and achieve quick connection and disconnection. It is a type of connector that can connect or disconnect pipelines without tools. Connect the quick-connect ball valve stop coupling to the pipeline, ensuring that the sealing ring seals with the pipeline. Then connect the quick-connect ball valve stop coupling to the pipeline, open the ball valve to allow the media to flow, and close the ball valve to disconnect the connection when needed. It features simple structure, convenient use, and good sealing performance.

[0003] Currently, the common two-linkage ball valve quick-connect couplings are connected by a pre-set docking limit block and docking groove on the end face of the ball valve. During installation, the docking limit block on one ball valve is inserted into the docking groove on the other ball valve, and one ball valve is rotated 45° to complete the docking of the two-linkage ball valve quick-connect couplings. The two-linkage ball valve quick-connect couplings lack a safety locking device. After docking, if the pressure at the connection point is too high, the pipeline vibrates, or the residual pressure breaks, the two-linkage ball valve quick-connect couplings are prone to reverse disconnection, resulting in splashing of the medium in the pipeline and the coupling flying out. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a quick-connect coupling for a ball valve, which solves the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a quick-connect coupling for a linkage ball valve, comprising: two quick-connect couplings for linkage ball valves that are connected to each other;

[0006] The quick-connect coupling for the ball valve includes a valve housing and a ball installed inside the valve housing. A rotary switch for controlling the rotation of the ball is installed on the surface of the valve housing. Both valve housings have a mating limit member and a mating groove on their end faces. One end of the mating limit member on one valve housing is inserted into the inner wall of the mating groove on the other valve housing. Both valve housings have a locking groove and a locking assembly on their end faces. One end of the locking assembly on one valve housing is inserted into the inner wall of the locking groove on the other valve housing. The rotary switch has a receiving groove inside, and a limit assembly is installed on the inner wall of the receiving groove.

[0007] The limiting assembly includes a first return spring, a push rod, a limiting bead, and a fixing screw ring. The first return spring, the push rod, and the fixing screw ring are all installed inside the receiving groove. One end of the first return spring is connected to the inner wall of the receiving groove, and the other end of the first return spring is connected to one end of the push rod. The end of the push rod away from the first return spring passes through the fixing screw ring and extends to the outside of the switch rotary wrench. A limiting hole is formed in the inner wall of the receiving groove, and the limiting bead is connected inside the limiting hole. A first receiving ring groove for the movement of the limiting bead is provided on the surface of the push rod.

[0008] Preferably, the locking assembly includes an anti-reverse lever and a connecting shaft. The valve housing has a mounting groove at its end for mounting the connecting shaft. The anti-reverse lever is rotatably connected to the surface of the connecting shaft. The inner wall of the mounting groove has a movable groove and a connecting hole. The surface of the switch rotary wrench has a first retaining groove. The surface of the anti-reverse lever is provided with a drive rod. One end of the drive rod passes through the movable groove and is connected to the inner wall of the first retaining groove. The inner wall of the connecting hole is provided with a push spring, and one end of the push spring is connected to the surface of the anti-reverse lever.

[0009] Preferably, both valve housings are provided with a wrench positioning assembly;

[0010] The wrench positioning assembly includes a positioning post and a positioning ball. A connecting groove is formed on the end face of the valve housing, and a through groove is formed on the surface of the valve housing, which is connected to the connecting groove. The positioning post is installed on the inner wall of the connecting groove, and one end of the positioning post extends to the outside of the connecting groove. The positioning ball is installed on the inner wall of the through groove. A first limiting groove is formed on the surface of the switch rotary wrench at the position corresponding to the through groove, and the inner wall of the first limiting groove is movably connected to the surface of the positioning ball. A second accommodating annular groove for the movement of the positioning ball is formed on the surface of the positioning post.

[0011] Preferably, the wrench positioning assembly further includes a second return spring, which is installed inside the connecting groove and sleeved on the surface of the positioning post. The surface of the positioning post is provided with a limiting part, and one end of the second return spring is connected to the surface of the limiting part.

[0012] Preferably, the surface of the valve housing has a through hole for mounting a switch rotary wrench, the switch rotary wrench has a second limiting groove, the inner wall of the second limiting groove is fitted with a fixing bolt, the surface of the ball has a second retaining groove, the inner wall of the second retaining groove has a threaded groove, one end of the switch rotary wrench is engaged with the inner wall of the second retaining groove, and the inner wall of the threaded groove is threadedly connected to one end of the fixing bolt.

[0013] Preferably, the surface of the fixing bolt is connected to a first sealing ring, the inner wall of the first sealing ring is connected to the inner wall of the second limiting groove, and the surface of the switch rotary plate is provided with a second sealing ring, the surface of the second sealing ring is connected to the inner wall of the through hole.

[0014] Preferably, a support groove is formed on the surface of the ball away from the switch rotary wrench, and a fixing groove is formed on the inner wall of the valve body at a position corresponding to the support groove. A positioning spring is provided on the inner wall of the fixing groove, and a rotating shaft is provided at one end of the positioning spring. One end of the rotating shaft is inserted into the inner wall of the fixing groove.

[0015] Preferably, a first sealing gasket is installed on the end face of the valve housing, a second sealing gasket is provided on the inner wall of the valve housing, the second sealing gasket is connected to the surface of the ball, and a protective ring is provided on the surface of the valve housing.

[0016] Preferably, a connecting pipe is installed at one end of the valve body, and one end of the connecting pipe is inserted into the interior of the valve body. At least one mounting hole is opened on the surface of the valve body, and a positioning hole is opened on the surface of the connecting pipe corresponding to the mounting hole. A positioning pin is inserted into the inner wall of the mounting hole, and one end of the positioning pin is inserted into the inner wall of the positioning hole.

[0017] Preferably, a first sealing ring and a second sealing ring are respectively installed on the surface of the connecting pipe, and the surfaces of the first sealing ring and the second sealing ring are both connected to the inner wall of the valve body.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This utility model, by setting a locking groove and a locking component, allows two identical linkage ball valve stop quick connectors to be connected and rotated 45° so that the two arrow positions on the linkage ball valve stop quick connectors coincide. Then, each of them rotates the switch wrench 90°. At this time, the ball is fully opened and successfully connected. The outer surface of the switch wrench pushes up the anti-reverse lever, and the anti-reverse lever is locked in the two corresponding locking grooves. The ball valve is prevented from reversing when connected and in the liquid-filled state, avoiding liquid leakage at the joint. When the joint needs to be disconnected, the ball valve switch wrench must first be rotated to the ball valve closed position before the ball valve can be disconnected.

[0020] 2. In this utility model, by setting a wrench positioning component, after the ball valve is disconnected, the second return spring pushes the positioning column to move, and the inner wall of the second accommodating ring groove of the positioning column squeezes the positioning bead. The moving positioning bead is engaged in the first limit groove of the switch rotary wrench. At this time, the ball valve switch rotary wrench cannot be rotated, which plays a foolproof role and keeps the ball valve in a closed state, preventing liquid from flowing.

[0021] 3. This utility model, by setting a limiting component, a first positioning groove and a second positioning groove, when the quick-connect coupling of the ball valve is closed, the pressing rod abuts against the limiting bead, so that the limiting bead is locked in the first positioning groove. After the quick-connect coupling of the ball valve is connected, the pressing rod is pressed, and the first receiving ring groove moves to the position of the limiting bead. At this time, the switch rotary wrench can be rotated. After rotating the switch rotary wrench 90°, the pressing rod is released, and the first return spring pushes the pressing rod to return to its original position, pushing the limiting bead to be locked in the second positioning groove, locking the position of the switch rotary wrench, and preventing the switch rotary wrench from rotating back under the action of external forces such as excessive pressure or vibration. Attached Figure Description

[0022] Figure 1 This is a side sectional view of the present invention.

[0023] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0024] Figure 3 This utility model Figure 1 Enlarged structural diagram at point B;

[0025] Figure 4 This is a side sectional view of the wrench positioning component of this utility model.

[0026] Figure 5 This utility model Figure 4 Enlarged structural diagram at point C;

[0027] Figure 6 This is a partial side sectional view of the locking component position when the two linked ball valve shut-off quick connectors are connected;

[0028] Figure 7 This utility model Figure 6 A magnified schematic diagram of the central locking component location;

[0029] Figure 8 This is a schematic diagram of the locked state structure of the two linked ball valve quick-connect couplings of this utility model;

[0030] Figure 9 This is a partial side sectional view of the locking component position when the two linked ball valve shut-off quick connectors of this utility model are locked.

[0031] Figure 10 This utility model Figure 9 A magnified schematic diagram of the central locking component location;

[0032] Figure 11 This is a side sectional view of the limiting component of this utility model.

[0033] Figure 12 This utility model Figure 11 Enlarged structural diagram at position D.

[0034] In the diagram: 1. Quick-connect coupling for ball valve shut-off; 2. Valve body; 3. Ball; 4. Switch rotary wrench; 5. Connecting limit component; 6. Connecting groove; 7. Locking groove; 8. Locking assembly; 81. Anti-reverse lever; 82. Connecting shaft; 9. Mounting groove; 10. Movable groove; 11. Connecting hole; 12. First slot; 13. Drive rod; 14. Push spring; 15. Wrench positioning assembly; 151. Positioning pin; 152. Positioning bead; 153. Second return spring; 154. Limiting part; 16. Connecting groove; 17. Through groove; 18. Second receiving ring groove; 19. Through hole; 20. Second limiting groove; 21. Fixing bolt; 22. Second slot; 2 3. Threaded groove; 24. First sealing ring; 25. Second sealing ring; 26. Support groove; 27. Fixing groove; 28. Positioning spring; 29. ​​Rotating shaft; 30. First sealing gasket; 31. Second sealing gasket; 32. Protective ring; 33. Connecting pipe fitting; 34. Mounting hole; 35. Positioning hole; 36. Positioning pin; 37. First sealing ring; 38. Second sealing ring; 39. First limiting groove; 40. Receiving groove; 41. Limiting assembly; 411. First return spring; 412. Press rod; 413. Limiting bead; 414. Fixing threaded ring; 415. First receiving ring groove; 42. Limiting hole; 43. First positioning groove; 44. Second positioning groove. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Please see Figure 1-10 A quick-connector for a linkage ball valve, comprising: two quick-connectors 1 for linkage ball valves that are mated together;

[0037] The quick-connector 1 for the ball valve includes a valve housing 2 and a ball 3 installed inside the valve housing 2. A switch rotary wrench 4 for controlling the rotation of the ball 3 is installed on the surface of the valve housing 2. Both valve housings 2 have a docking limit member 5 and a docking groove 6 on their end faces. One end of the docking limit member 5 on one valve housing 2 is inserted into the inner wall of the docking groove 6 on the other valve housing 2. Both valve housings 2 have a locking groove 7 and a locking component 8 on their end faces. One end of the locking component 8 on one valve housing 2 is inserted into the inner wall of the locking groove 7 on the other valve housing 2. The switch rotary wrench 4 has a receiving groove 40 inside. A limit component 41 is installed on the inner wall of the receiving groove 40.

[0038] The limiting assembly 41 includes a first return spring 411, a push rod 412, a limiting bead 413, and a fixing screw ring 414. The first return spring 411, push rod 412, and fixing screw ring 414 are all installed inside the receiving groove 40. One end of the first return spring 411 is connected to the inner wall of the receiving groove 40, and the other end of the first return spring 411 is connected to one end of the push rod 412. The end of the push rod 412 away from the first return spring 411 passes through the fixing screw ring 414 and extends to the outside of the switch rotary wrench. A limiting hole 42 is formed in the inner wall of the receiving groove 40, and the limiting bead 413 is connected inside the limiting hole 42. The surface of the push rod 412 is provided with a first receiving ring groove 415 for the movement of the limiting bead 413. The surface of the valve housing 2 is respectively provided with a first positioning groove 43 and a second positioning groove 44 for the limiting bead 413 to engage. When the linkage ball valve stop quick connector 1 is closed, the push rod 412 abuts against the limiting bead 413. Position bead 413 is engaged in the first positioning groove 43. After the quick-connect coupling 1 of the ball valve is connected, push the push rod 412 on the switch rotary wrench 4 to push the push rod 412 to the receiving groove 40. The push rod 412 compresses the first return spring 411. At the same time, the first receiving ring groove 415 moves to the position of the position bead 413, so that the position bead 413 engaged in the first positioning groove 43 can move into the first receiving ring groove 415. At this time, the switch rotary wrench 4 can be rotated. The rotation angle of the switch rotary wrench 4 is 90°. Release the push rod 412. The first return spring 411 pushes the push rod 412 to reset. The inner wall of the first receiving ring groove 415 squeezes the position bead 413, pushing the position bead 413 to engage in the second positioning groove 44, locking the position of the switch rotary wrench 4, and preventing the switch rotary wrench 4 from rotating back under the action of external forces such as excessive pressure or vibration.

[0039] The locking assembly 8 includes an anti-reverse lever 81 and a connecting shaft 82. The end of the valve body 2 is provided with a mounting groove 9 for mounting the connecting shaft 82. The anti-reverse lever 81 is rotatably connected to the surface of the connecting shaft 82. The inner wall of the mounting groove 9 is provided with a movable groove 10 and a connecting hole 11. The surface of the switch rotary wrench 4 is provided with a first retaining groove 12. The surface of the anti-reverse lever 81 is provided with a drive rod 13. One end of the drive rod 13 passes through the movable groove 10 and is connected to the inner wall of the first retaining groove 12. The inner wall of the connecting hole 11 is provided with a push spring 14, and one end of the push spring 14 is connected to the surface of the anti-reverse lever 81. The outer circular surface of the switch rotary wrench 4 pushes up the anti-reverse lever 81. The anti-reverse lever 81 is locked in two corresponding locking grooves 7, so that when the linkage ball valve shut-off quick connector 1 is connected and in the liquid-flow state, it prevents the two valve bodies 2 from reversing and opening each other, thus avoiding liquid leakage from the connector.

[0040] Both valve housings 2 are equipped with a wrench positioning assembly 15, which includes a positioning post 151 and a positioning bead 152. A connecting groove 16 is formed on the end face of the valve housing 2, and a through groove 17 is formed on the surface of the valve housing 2, communicating with the connecting groove 16. The positioning post 151 is installed on the inner wall of the connecting groove 16, with one end extending to the outside of the connecting groove 16. The positioning bead 152 is installed on the inner wall of the through groove 17. A first limiting groove 39 is formed on the surface of the switch rotary wrench 4 corresponding to the position of the through groove 17, and the inner wall of the first limiting groove 39 is movably connected to the surface of the positioning bead 152. A second receiving ring groove 18 for the movement of the positioning bead 152 is formed on the surface of the positioning post 151. The wrench positioning assembly 15 also includes a second return spring 153, which is installed inside the connecting groove 16 and sleeved on the surface of the positioning post 151. A limiting part 1 is formed on the surface of the positioning post 151. 54. One end of the second return spring 153 is connected to the surface of the limiting part 154. When the two linkage ball valve stop quick connectors 1 are connected, the end face of the valve body 2 pushes the positioning pin 151 into the interior of the connecting groove 16, so that the second receiving ring groove 18 of the positioning pin 151 moves to the position of the positioning bead 152. At the same time, the limiting part 154 of the positioning pin 151 compresses the second return spring 153. When the switch rotary wrench 4 is turned, the positioning bead 152 moves to the second receiving ring groove 18. After the linkage ball valve stop quick connector 1 is disconnected, the second return spring 153 extends back and pushes the positioning pin 151 to move. The inner wall of the second receiving ring groove 18 of the positioning pin 151 squeezes the positioning bead 152, and the moving positioning bead 152 is engaged in the first limiting groove 39 of the switch rotary wrench 4. At this time, the switch rotary wrench 4 of the linkage ball valve stop quick connector 1 cannot be rotated, which plays a foolproof role and prevents accidental contact with the switch rotary wrench 4, so that the linkage ball valve stop quick connector 1 is in a closed state and cannot be supplied with liquid.

[0041] The valve body 2 has a through hole 19 for mounting a switch rotary wrench 4. The switch rotary wrench 4 has a second limiting groove 20. A fixing bolt 21 is installed on the inner wall of the second limiting groove 20. The ball 3 has a second retaining groove 22. The inner wall of the second retaining groove 22 has a threaded groove 23. One end of the switch rotary wrench 4 is engaged with the inner wall of the second retaining groove 22. The inner wall of the threaded groove 23 is threadedly connected to one end of the fixing bolt 21. A first sealing ring 24 is connected to the surface of the fixing bolt 21. The inner wall of the first sealing ring 24 is connected to the inner wall of the second limiting groove 20. A second sealing ring 25 is provided on the surface of the switch rotary wrench. The surface of the second sealing ring 25 is connected to the inner wall of the through hole 19.

[0042] A support groove 26 is provided on the surface of the ball 3 away from the switch rotary wrench 4, and a fixing groove 27 is provided on the inner wall of the valve body 2 at a position corresponding to the support groove 26. A positioning spring 28 is provided on the inner wall of the fixing groove 27, and a rotating shaft 29 is provided at one end of the positioning spring 28. One end of the rotating shaft 29 is inserted into the inner wall of the fixing groove 27. The rotating shaft 29 supports the ball 3, so that the ball 3 remains stable during rotation.

[0043] A first sealing gasket 30 is installed on the end face of the valve body 2, and a second sealing gasket 31 is provided on the inner wall of the valve body 2. The second sealing gasket 31 is connected to the surface of the ball 3, and a protective ring 32 is provided on the surface of the valve body 2.

[0044] A connecting pipe 33 is installed at one end of the valve body 2. One end of the connecting pipe 33 is inserted into the interior of the valve body 2. At least one mounting hole 34 is opened on the surface of the valve body 2. A positioning hole 35 is opened on the surface of the connecting pipe 33 at the position corresponding to the mounting hole 34. A positioning pin 36 is inserted into the inner wall of the mounting hole 34. One end of the positioning pin 36 is inserted into the inner wall of the positioning hole 35. A first sealing ring 37 and a second sealing ring 38 are respectively installed on the surface of the connecting pipe 33, and the surfaces of the first sealing ring 37 and the second sealing ring 38 are both connected to the inner wall of the valve body 2.

[0045] Two identical quick-connect ball valve stop connectors 1 are used. The limiting member 5 on one valve housing 2 is inserted into the inner wall of the mating groove 6 on the other valve housing 2. Rotating one of the quick-connect ball valve stop connectors 1 by 145° aligns the two arrows on it. At this point, the limiting member 5 hooks into the inside of the mating groove 6. After the quick-connect ball valve stop connectors 1 are connected, the push lever 412 on the rotary wrench 4 is pushed to the receiving groove 40. The push lever 412 compresses the first return spring 411, and simultaneously the first receiving ring groove 415 moves to the position of the limiting bead 413, allowing the limiting bead 413, which is engaged in the first positioning groove 43, to move to the position of the first positioning groove 413. Within the receiving annular groove 415, the switch rotary wrench 4 can be rotated. The rotation angle of the switch rotary wrench 4 is 90°. Releasing the push rod 412 causes the first return spring 411 to push the push rod 412 back to its original position. The inner wall of the first receiving annular groove 415 presses against the limiting bead 413, pushing the limiting bead 413 into the second positioning groove 44, locking the position of the switch rotary wrench 4. This prevents the switch rotary wrench 4 from rotating back under excessive pressure or vibration. After rotating the switch rotary wrench 4, the ball 3 is fully opened and successfully connected. The outer surface of the switch rotary wrench 4 raises the anti-reverse lever. 81. The anti-reverse levers 81 are locked in the two corresponding locking grooves 7, preventing the two valve bodies 2 from reversing and opening each other when the quick-connect coupling 1 is in the connected and fluid-flowing state, thus avoiding fluid leakage from the joint. When the joint needs to be disconnected, the switch wrench 4 of the quick-connect coupling 1 must first be rotated to the closed position, pushing the spring 14 to push the anti-reverse levers 81 to reset and leave the locking grooves 7 before the quick-connect coupling 1 can be rotated to disconnect the connection. When the two quick-connect couplings 1 are connected, the end face of the valve body 2 pushes the positioning pin 151 into the interior of the connecting groove 16, causing the second receiving annular groove 18 of the positioning pin 151 to move to the positioning position. At the position of bead 152, the limiting part 154 of the positioning column 151 compresses the second return spring 153. When the switch rotary wrench 4 is turned, the positioning bead 152 moves to the second receiving annular groove 18. After the linkage ball valve shut-off quick connector 1 is disconnected, the second return spring 153 extends back and pushes the positioning column 151 to move. The inner wall of the second receiving annular groove 18 of the positioning column 151 squeezes the positioning bead 152, and the moving positioning bead 152 is engaged in the first limiting groove 39 of the switch rotary wrench 4. At this time, the switch rotary wrench 4 of the linkage ball valve shut-off quick connector 1 cannot be rotated, which plays a foolproof role and prevents accidental activation of the switch rotary wrench 4, so that the linkage ball valve shut-off quick connector 1 is in a closed state and cannot be supplied with liquid.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-connect coupling for a ball valve, characterized in that, include: Two quick-connector shut-off ball valves that are connected to each other (1); The quick-connector (1) for the ball valve includes a valve housing (2) and a ball (3) installed inside the valve housing (2). A switch rotary wrench (4) for controlling the rotation of the ball (3) is installed on the surface of the valve housing (2). Both valve housings (2) have a docking limit member (5) and a docking groove (6) on their end faces. One end of the docking limit member (5) on one valve housing (2) is inserted into the inner wall of the docking groove (6) on the other valve housing (2). Both valve housings (2) have a locking groove (7) and a locking component (8) on their end faces. One end of the locking component (8) on one valve housing (2) is inserted into the inner wall of the locking groove (7) on the other valve housing (2). The switch rotary wrench (4) has a receiving groove (40) inside. A limit component (41) is installed on the inner wall of the receiving groove (40). The limiting assembly (41) includes a first return spring (411), a push rod (412), a limiting bead (413), and a fixing ring (414). The first return spring (411), the push rod (412), and the fixing ring (414) are all installed inside the receiving groove (40). One end of the first return spring (411) is connected to the inner wall of the receiving groove (40), and the other end of the first return spring (411) is connected to one end of the push rod (412). The end of the push rod (412) away from the first return spring (411) passes through the fixing ring (414) and extends to the outside of the switch rotary wrench. A limiting hole (42) is opened in the inner wall of the receiving groove (40). The limiting bead (413) is connected inside the limiting hole (42). The surface of the push rod (412) is provided with a first receiving ring groove (415) for the movement of the limiting bead (413). The surface of the valve housing (2) is provided with a first positioning groove (43) and a second positioning groove (44) for engaging the limiting bead (413).

2. The quick-connect coupling for a ball valve according to claim 1, characterized in that, The locking assembly (8) includes an anti-reverse lever (81) and a connecting shaft (82). The valve housing (2) has an installation groove (9) for installing the connecting shaft (82) at its end. The anti-reverse lever (81) is rotatably connected to the surface of the connecting shaft (82). The inner wall of the installation groove (9) has a movable groove (10) and a connecting hole (11). The surface of the switch rotary wrench (4) has a first slot (12). The surface of the anti-reverse lever (81) is provided with a drive rod (13). One end of the drive rod (13) passes through the movable groove (10) and is connected to the inner wall of the first slot (12). The inner wall of the connecting hole (11) is provided with a push spring (14), and one end of the push spring (14) is connected to the surface of the anti-reverse lever (81).

3. The quick-connect coupling for a ball valve according to claim 1, characterized in that, Both valve housings (2) are provided with a wrench positioning assembly (15); The wrench positioning assembly (15) includes a positioning post (151) and a positioning bead (152). The end face of the valve housing (2) is provided with a connecting groove (16). The surface of the valve housing (2) is provided with a through groove (17), and the through groove (17) is connected to the connecting groove (16). The positioning post (151) is installed on the inner wall of the connecting groove (16), and one end of the positioning post (151) extends to the outside of the connecting groove (16). The positioning bead (152) is installed on the inner wall of the through groove (17). The surface of the switch rotary wrench (4) is provided with a first limiting groove (39) corresponding to the position of the through groove (17), and the inner wall of the first limiting groove (39) is movably connected to the surface of the positioning bead (152). The surface of the positioning post (151) is provided with a second accommodating annular groove (18) for the movement of the positioning bead (152).

4. The quick-connect coupling for a ball valve according to claim 3, characterized in that, The wrench positioning assembly (15) further includes a second return spring (153), which is installed inside the connecting groove (16) and sleeved on the surface of the positioning post (151). The surface of the positioning post (151) is provided with a limiting part (154), and one end of the second return spring (153) is connected to the surface of the limiting part (154).

5. The quick-connect coupling for a ball valve according to claim 1, characterized in that, The valve housing (2) has a through hole (19) for installing a switch rotary wrench (4) on its surface. The switch rotary wrench (4) has a second limiting groove (20) and a fixing bolt (21) is installed on the inner wall of the second limiting groove (20). The ball (3) has a second slot (22) on its surface and a threaded groove (23) on the inner wall of the second slot (22). One end of the switch rotary wrench (4) is engaged with the inner wall of the second slot (22), and the inner wall of the threaded groove (23) is threaded to one end of the fixing bolt (21).

6. The quick-connect coupling for a linkage ball valve according to claim 5, characterized in that, The surface of the fixing bolt (21) is connected to a first sealing ring (24), the inner wall of the first sealing ring (24) is connected to the inner wall of the second limiting groove (20), and the surface of the switch rotary plate is provided with a second sealing ring (25), the surface of the second sealing ring (25) is connected to the inner wall of the through hole (19).

7. The quick-connect coupling for a linkage ball valve according to claim 1, characterized in that, The ball (3) has a support groove (26) on its surface away from the switch rotary wrench (4), and a fixing groove (27) is provided on the inner wall of the valve body (2) at a position corresponding to the support groove (26). A positioning spring (28) is provided on the inner wall of the fixing groove (27), and a rotating shaft (29) is provided at one end of the positioning spring (28). One end of the rotating shaft (29) is inserted into the inner wall of the fixing groove (27).

8. A quick-connect coupling for a ball valve according to claim 1, characterized in that, The valve housing (2) is provided with a first sealing gasket (30) on its end face, and a second sealing gasket (31) is provided on the inner wall of the valve housing (2). The second sealing gasket (31) is connected to the surface of the ball (3), and a protective ring (32) is provided on the surface of the valve housing (2).

9. A quick-connect coupling for a ball valve according to claim 1, characterized in that, A connecting pipe (33) is installed at one end of the valve body (2). One end of the connecting pipe (33) is inserted into the interior of the valve body (2). At least one mounting hole (34) is opened on the surface of the valve body (2). A positioning hole (35) is opened on the surface of the connecting pipe (33) corresponding to the mounting hole (34). A positioning pin (36) is inserted into the inner wall of the mounting hole (34). One end of the positioning pin (36) is inserted into the inner wall of the positioning hole (35).

10. A quick-connect coupling for a linkage ball valve according to claim 9, characterized in that, The surface of the connecting pipe (33) is respectively equipped with a first sealing ring (37) and a second sealing ring (38), and the surface of the first sealing ring (37) and the surface of the second sealing ring (38) are both connected to the inner wall of the valve body (2).

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