Split type detachable gate valve

Abstract

The utility model discloses a split type detachable gate valve. A hook claw is integrally formed on the connecting face of the valve deck, an empty groove is formed in the connecting face of the valve body in the circumferential direction, and a quick release piece is arranged in the groove and comprises a hook groove matched with the hook claw, a push rod, a push piece and a reset spring and is provided with a rubber shock absorber which is guided through a protruding strip and a sliding groove. The push rod is exposed through the side hole and can be simultaneously pressed by the unlocking disc to realize multi-point simultaneous unlocking; the valve body and the valve cover are provided with positioning structures to prevent relative rotation. According to the structure, the valve cover can be quickly assembled and disassembled without disassembling a pipe, stress is uniform, and positioning is accurate; and the locking stability under the vibration working condition is improved through cooperation of rubber damping and limiting, operation is convenient, and the maintenance efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a split-type detachable gate valve. Background Technology

[0002] Gate valves, widely used in industrial and municipal pipeline networks, typically consist of core components such as the valve body, valve cover, valve stem, and gate. In current engineering practice, the valve cover and valve body are often connected using flanges and bolts, with a ring gasket for sealing. While this connection method offers good structural strength and sealing reliability, actual maintenance and replacement of packing, valve stem, gate, or valve seat require the disassembly of multiple bolts one by one. This not only consumes a significant amount of time and increases labor intensity but also makes operation inconvenient and reduces maintenance efficiency in special working conditions such as confined spaces, high-altitude operations, or underground work.

[0003] Furthermore, some existing quick-release solutions are prone to retraction or loosening in environments with vibration, such as pump stations, vehicles, and ships. Lacking reliable vibration-resistant design, they pose a risk of failure over long-term operation, potentially leading to equipment malfunctions or even safety accidents. Additionally, many existing quick-release structures are cumbersome to operate, typically requiring the operator to press or pry open multiple unlocking points around the perimeter. When there are many unlocking points or the operator is wearing protective gloves, operational efficiency is further reduced, and inconsistent operation is poor, impacting overall maintenance efficiency.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0005] This utility model discloses a split-type detachable gate valve, which aims to solve the problems of cumbersome disassembly, time-consuming and labor-intensive disassembly during maintenance and component replacement of existing gate valves, as well as easy loosening under vibration conditions and low operating efficiency.

[0006] The technical solution of this utility model is as follows: This utility model discloses a split-type detachable gate valve, including: a valve body and a valve cover; the connecting surface of the valve cover is provided with a hook; the connecting surface of the valve body is provided with a slot for accommodating a quick-release component; the quick-release component is movably disposed in the slot, and includes a hook groove that cooperates with the hook, and a spring for driving it to reset; the quick-release component is provided with a rubber shock absorber for absorbing vibration; the connecting surface of the valve body and the valve cover is provided with a positioning structure for preventing relative rotation between the two. Through this technical solution, the valve body and valve cover can be quickly disassembled and installed, significantly improving maintenance efficiency. Simultaneously, the rubber shock absorber effectively absorbs vibration, enhancing the stability and reliability of the connection, and the positioning structure prevents relative rotation, ensuring the accuracy of the connection.

[0007] Furthermore, the aforementioned split-type detachable gate valve also includes an unlocking disc; the unlocking disc is movably sleeved on the valve body, and the unlocking disc is used to drive multiple quick-release components to move synchronously.

[0008] This technical solution enables the simultaneous unlocking of multiple quick-release components, simplifying the operation process.

[0009] More specifically, in some embodiments, according to the above-described split-type detachable gate valve, the positioning structure includes a hexagonal protrusion disposed on the connecting surface of the valve body, and a groove disposed on the connecting surface of the valve cover that mates with the hexagonal protrusion.

[0010] This technical solution provides a reliable positioning effect through the cooperation of hexagonal protrusions and grooves, ensuring the stability of the connection.

[0011] Preferably, according to the above-described split-type detachable gate valve, the quick-release component includes a push rod and a push plate connected to the push rod; the hook groove is provided on the push rod; and one end of the spring abuts against the push plate.

[0012] This technical solution, through the structural design of the push rod and push plate, makes the movement of the hook groove more stable and reliable.

[0013] Furthermore, according to the above-mentioned split-type detachable gate valve, the valve body is provided with a side hole communicating with the slot; one end of the push rod passes through the side hole and extends out of the valve body.

[0014] This technical solution allows the push rod to extend outside the valve body, making it convenient for the operator to press or flick it.

[0015] More specifically, in some implementations, according to the above-described split-type detachable gate valve, the end of the push rod extending out of the valve body is configured as a dome structure.

[0016] This technical solution allows the extended end of the push rod to adopt a dome structure, increasing comfort during operation.

[0017] Preferably, according to the above-mentioned split-type detachable gate valve, the quick-release component includes a side plate with a sliding groove; the rubber shock absorber is provided with a protrusion that slides in cooperation with the sliding groove.

[0018] This technical solution enables the rubber shock absorber to maintain a stable position when absorbing vibration through the sliding cooperation between the groove and the convex strip, preventing it from falling off or shifting.

[0019] Furthermore, according to the aforementioned split-type detachable gate valve, limit posts are provided on both sides of the rubber shock absorber. This technical solution allows for further limiting of the rubber shock absorber via the limit posts, preventing lateral displacement under severe vibration and enhancing the reliability of the shock absorption structure.

[0020] More specifically, in some implementations, according to the aforementioned split-type detachable gate valve, the quick-release component has a slot for inserting the claw.

[0021] This technical solution provides a precise insertion position for the hook claw, ensuring accurate matching between the hook claw and the hook groove.

[0022] Preferably, according to the above-mentioned split-type detachable gate valve, a plurality of slots are provided on the connecting surface of the valve body along the circumferential direction; each slot is provided with a quick-release component.

[0023] This technical solution enables the uniform distribution of force at multiple points by setting multiple quick-release parts along the circumference, thereby enhancing the stability of the connection between the valve body and the valve cover and dispersing stress.

[0024] Beneficial effects

[0025] This invention achieves rapid connection and separation between the valve body and the valve cover by setting a hook on the valve cover connection surface and opening a slot on the valve body connection surface to accommodate a quick-release component. The quick-release component is movably disposed in the slot and includes a hook groove that cooperates with the hook and a spring for driving its reset. This shortens the disassembly and assembly time and significantly reduces the labor intensity of maintenance personnel. It is especially convenient to operate in confined spaces or special working conditions.

[0026] Furthermore, this invention incorporates a rubber shock absorber on the quick-release component to absorb vibration, effectively solving the problem of existing quick-release solutions prone to retraction or loosening under vibration conditions. The rubber shock absorber absorbs external vibration energy, maintaining stable engagement between the quick-release component and the hook, thereby enhancing the reliability and safety of the connection and avoiding the risk of failure due to vibration. Simultaneously, the positioning structure on the connection surface between the valve body and the valve cover further prevents relative rotation between the two in the connected state, ensuring the stability and accuracy of the connection. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a split-type detachable gate valve.

[0028] Figure 2 Exploded view of a split-type detachable gate valve.

[0029] Figure 3 for Figure 1 An exploded view of a split-type detachable gate valve from another angle.

[0030] Figure 4 for Figure 3 A schematic diagram of section A of a split-type detachable gate valve.

[0031] Figure 5This is a cross-sectional schematic diagram of a split-type detachable gate valve quick-release component.

[0032] Figure 6 This is a schematic diagram of a split-type detachable gate valve feed rod rubber shock-absorbing gas structure.

[0033] Attached icon numbers:

[0034] 1. Valve cover; 11. Hook; 2. Valve body; 21. Hole; 22. Side hole; 23. Hexagonal protrusion;

[0035] 3. Quick-release parts; 31. Push rod; 311. Hook groove; 312. Push plate; 32. Spring; 33. Rubber shock absorber

[0036] Device; 331, protruding strip; 332, sliding groove; 333, limiting post; 34, insertion groove; 35, side plate; 4, solution

[0037] 5. Locking disc; 6. Valve stem; 7. Valve plate; 8. Handwheel. Detailed Implementation

[0038] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application.

[0039] Gate valves, widely used in industrial and municipal pipeline networks, typically consist of core components such as the valve body, valve cover, valve stem, and gate. In current engineering practice, the valve cover and valve body are often connected using flanges and bolts, with a ring gasket for sealing. While this connection method offers good structural strength and sealing reliability, actual maintenance and replacement of packing, valve stem, gate, or valve seat require the disassembly of multiple bolts one by one. This not only consumes a significant amount of time and increases labor intensity but also makes operation inconvenient and reduces maintenance efficiency in special working conditions such as confined spaces, high-altitude operations, or underground work.

[0040] Furthermore, some existing quick-release solutions are prone to retraction or loosening in environments with vibration, such as pump stations, vehicles, and ships. Lacking reliable vibration-resistant design, they pose a risk of failure over long-term operation, potentially leading to equipment malfunctions or even safety accidents. Additionally, many existing quick-release structures are cumbersome to operate, typically requiring the operator to press or pry open multiple unlocking points around the perimeter. When there are many unlocking points or the operator is wearing protective gloves, operational efficiency is further reduced, and inconsistent operation is poor, impacting overall maintenance efficiency.

[0041] This utility model discloses a split-type detachable gate valve, which aims to solve the problems of cumbersome disassembly, time-consuming and labor-intensive disassembly during maintenance and component replacement of existing gate valves, as well as easy loosening under vibration conditions and low operating efficiency.

[0042] This embodiment discloses a split-type detachable gate valve. See [link to relevant documentation]. Figures 1 to 3 The valve mainly consists of a valve body 2 and a valve cover 1. The valve body 2 is the main part of the gate valve, typically used to carry fluid and provide an installation interface; the valve cover 1 covers the valve body 2, enclosing the interior of the valve body 2, and usually integrates operating components such as a valve stem 5 and a handwheel 7. The connection surface between the valve body 2 and the valve cover 1 is provided with a positioning structure to prevent relative rotation between the two, ensuring accurate alignment of the valve body 2 and the valve cover 1 during connection and preventing unnecessary relative rotation during operation, thereby improving the stability and reliability of the connection.

[0043] Furthermore, a hook 11 is provided on the connecting surface of the valve cover 1. This hook 11 is a key component for achieving quick connection. The hook 11 is usually integrally cast with the valve cover, possessing a certain strength and rigidity, and can withstand the tensile force during connection. A slot 21 is provided on the connecting surface of the valve body 2 to accommodate the quick-release piece 3. The slot 21 is designed to provide installation space for the quick-release piece 3, and its shape and size match the quick-release piece 3, ensuring that the quick-release piece 3 can be stably installed inside the valve body 2.

[0044] The quick-release element 3 is movably disposed within the empty slot 21, designed to enable quick connection and separation of the valve body 2 and the valve cover 1. The quick-release element 3 includes a hook groove 311 that engages with the hook 11. The shape and size of the hook groove 311 match the hook 11, allowing for a tight fit and reliable locking connection when the hook 11 is inserted into the hook groove 311. The quick-release element 3 also includes a spring 32 for resetting it. The spring 32 is typically a compression spring, with one end abutting against the quick-release element 3 and the other end fixed within the empty slot 21. When the quick-release element 3 is unlocked, the spring 32 is compressed; upon release, it pushes the quick-release element 3 back to its original position, achieving automatic locking.

[0045] To improve the reliability of the gate valve under vibration conditions, a rubber shock absorber 33 is installed on the quick-release component 3 to absorb vibration. The rubber shock absorber 33 utilizes the viscoelasticity of rubber material to effectively absorb and dissipate vibration energy, thereby reducing the impact of vibration on the quick-release component 3 and the overall connection structure, and preventing loosening or failure of the connection.

[0046] Specifically, during the installation of the gate valve, the valve body 2 is first placed in the predetermined position. Next, the valve cover 1 is aligned with the valve body 2, ensuring that the groove on its connecting surface aligns with the hexagonal protrusion 23 on the connecting surface of the valve body 2. As the valve cover 1 falls, the hexagonal protrusion 23 guides the valve cover 1 to self-align and provides circumferential rotation limits, ensuring accurate and stable contact between the connecting surfaces of the valve cover 1 and the valve body 2. Once the valve cover 1 and valve body 2 are fully aligned, the hook 11 on the valve cover 1 engages with the hook groove 311 on the quick-release piece 3 within the empty slot 21 of the valve body 2. At this time, under the action of the spring 32, the hook groove 311 of the quick-release piece 3 tightly engages with the hook 11, forming an axial lock, thereby firmly pressing the valve cover 1 onto the valve body 2, achieving a quick connection.

[0047] During the operation of the gate valve, if vibration occurs in the pipeline system, the rubber shock absorber 33 will play its role. When vibration occurs, the rubber shock absorber 33 will generate viscoelastic hysteresis energy through deformation, converting vibration energy into heat energy or friction energy, thereby effectively absorbing and dissipating vibration and reducing the impact of vibration on the connection between the quick-release part 3 and the hook 11. This helps prevent the connection from loosening or retraction, significantly improving the vibration resistance stability and reliability of the gate valve during long-term operation.

[0048] When the gate valve needs to be disassembled for maintenance, the operator can use a specific unlocking mechanism, such as pushing the push rod 31 of the quick-release element 3 to move the quick-release element 3, causing its hook groove 311 to separate from the hook pawl 11. Once the hook pawl 11 disengages from the hook groove 311, the valve cover 1 can be easily removed from the valve body 2, achieving quick disassembly. After unlocking, the spring 32 will push the quick-release element 3 to reset, keeping it in a locked state by default, reducing the risk of detachment due to accidental operation.

[0049] However, in practice, when a gate valve needs to be disassembled, if multiple quick-release parts 3 exist, they must be operated one by one. This undoubtedly increases the complexity and time consumption of disassembly, especially in emergency repair or maintenance scenarios, where this method is inefficient. To solve the above problems, this application further proposes an improved split-type detachable gate valve that achieves synchronous movement of multiple quick-release parts 3, thereby significantly improving the disassembly efficiency of the gate valve.

[0050] Specifically, the split-type detachable gate valve of this application also includes an unlocking disc 4. The unlocking disc 4 is movably sleeved outside the valve body 2, and its main function is to drive multiple quick-release components 3 to move synchronously. The unlocking disc 4 can be designed as a ring structure, sleeved outside the valve body 2, and through specific structural cooperation with the quick-release components 3, achieves overall driving of the quick-release components 3.

[0051] When it is necessary to disassemble the valve body 2 and the valve cover 1, the operator only needs to operate the unlocking disc 4 to simultaneously disengage all quick-release parts 3 from the hook 11. For example, when the unlocking disc 4 is pushed upward, its internal structure can simultaneously act on all quick-release parts 3, causing the quick-release parts 3 to move outward, thereby separating the hook groove 311 from the hook 11. Thus, the valve cover 1 can be easily removed from the valve body 2.

[0052] In some preferred embodiments, the unlocking disc 4 can be designed as an annular sleeve with multiple bevels on its inner wall that mate with the ends of the push rods 31 of the quick-release components 3. When the unlocking disc 4 moves axially along the valve body 2, these bevels simultaneously act on the push rods 31 of all the quick-release components 3, causing the push rods 31 to move outward, thereby disengaging the hook grooves 311 from the hooks 11. Furthermore, the outer surface of the unlocking disc 4 can be provided with anti-slip textures or an operating handle for easy gripping and operation by the operator. This ensures smooth movement of the unlocking disc 4.

[0053] Furthermore, the hexagonal protrusion 23 on the connecting surface of the valve body 2 in the positioning structure not only has an automatic positioning function but also provides anti-torsion limiting. The connecting surface of the valve cover 1 has a groove that mates with the hexagonal protrusion 23. This mating method between the hexagonal protrusion 23 and the groove provides multi-directional limiting, effectively preventing relative rotation between the valve body 2 and the valve cover 1 when connected.

[0054] Furthermore, this application optimizes the specific structure of the quick-release component 3 by setting a push rod 31 and a push plate 312, and using a spring 32 to achieve reset, thereby improving the reliability and durability of the quick-release component 3.

[0055] The push rod 31 is a key component of the quick-release assembly 3. It features a hook groove 311 that engages with the hook 11 on the valve cover 1 to quickly connect and disconnect the valve body 2 and the valve cover 1. The push plate 312 is an integral part of the push rod 31. One end of the push plate abuts against the spring 32 to transmit the spring's restoring force, ensuring the push rod 31 accurately returns to its initial position. The spring 32, fitted onto the push rod 31, provides the necessary power for the quick-release assembly 3 to reset, ensuring a reliable connection between the hook groove 311 and the hook 11. The push plate 312 can be made of a material with good elasticity, such as spring steel, to ensure it effectively transmits the spring's restoring force. The spring constant of the spring 32 can be adjusted according to actual needs to achieve the best reset effect.

[0056] When the gate valve needs to be disassembled, simply overcome the spring force of spring 32 to move the push rod 31, separating the hook groove 311 from the hook pawl 11. During installation, align the hook pawl 11 on the valve cover 1 with the hook groove 311 on the push rod 31, apply a certain pressure to move the push rod 31, and the hook pawl 11 enters the hook groove 311. Under the action of spring 32, the push rod 31 returns to its original position, and the hook groove 311 and the hook pawl 11 fit tightly together, thus completing the connection between the valve body 2 and the valve cover 1. The function of the push plate 312 is to evenly transmit the restoring force of spring 32 to the push rod 31, ensuring that the push rod 31 can return to its original position smoothly and avoiding jamming.

[0057] Based on the above-described embodiments of this application, in order to facilitate the operation of the push rod 31, this application provides an improved solution. In this solution, a side hole 22 communicating with the slot 21 is opened on the valve body 2, and one end of the push rod 31 passes through the side hole 22 and extends out of the valve body 2.

[0058] The side hole 22 refers to a hole made in the valve body 2. The side hole 22 is connected to the slot 21, allowing the push rod 31 to partially pass through the side hole 22. The push rod 31 extends out of the valve body 2 so that the operator can directly access and operate the push rod 31 to control the quick-release part 3.

[0059] As a preferred embodiment, considering that operators may need to perform frequent disassembly operations in actual application scenarios, this application optimizes the structure of the push rod 31 to further improve the user experience. Specifically, the end of the push rod 31 extending out of the valve body 2 is set as a dome structure. This dome structure design facilitates the unlocking of the quick-release parts by the unlocking disc 4.

[0060] The dome structure refers to the fact that the end of the push rod 31 extending out of the valve body 2 is arc-shaped or hemispherical. This reduces the risk of the push rod 31 getting stuck. In addition, the dome structure also provides a good tactile feel, making it convenient for operators to press and reset the quick-release parts through the unlocking disc 4.

[0061] In some embodiments of this application, the connection method between the rubber shock absorber 33 and the quick-release piece 3 is crucial to the shock absorption effect and the reliability of the structure. To address this, this application proposes a specific connection structure by creating a groove 332 on the side plate 35 and providing a protrusion 331 on the rubber shock absorber 33 that slides in cooperation with the groove 332.

[0062] The side plate 35 is a component of the quick-release assembly 3, used to support and secure other parts. The groove 332 on the side plate provides guidance and limiting for the installation of the rubber shock absorber 33. The specific shape and size of the groove 332 can be designed according to actual needs. The protrusion 331 on the rubber shock absorber 33 slides in conjunction with the groove 332, allowing the rubber shock absorber 33 to move along the direction of the groove 332, thereby absorbing vibrations. The material of the protrusion 331 is usually chosen to be the same elastic material as the rubber shock absorber 33 to ensure good damping performance.

[0063] The solution in this application utilizes the sliding engagement of the groove 332 and the convex strip 331 to allow the rubber shock absorber 33 to move freely along the direction of the groove 332 when subjected to vibration, thereby effectively absorbing vibration energy and reducing the impact of vibration on the valve body 2 and the valve cover 1. Simultaneously, the groove 332 restricts the movement range of the rubber shock absorber 33, preventing excessive deformation or detachment and ensuring structural reliability.

[0064] Based on the above embodiments of this application, in order to further improve the stability and shock absorption effect of the quick-release component 3, this application proposes an improvement scheme, namely, setting limiting posts 333 on both sides of the rubber shock absorber 33. By setting the limiting posts 333, excessive deformation of the rubber shock absorber 33 when subjected to impact or vibration can be effectively limited, thereby ensuring the stable performance of its shock absorption capabilities and extending the service life of the rubber shock absorber 33. When the rubber shock absorber 33 is subjected to a large impact, the limiting posts 333 can provide timely support, preventing the rubber shock absorber 33 from being excessively compressed.

[0065] Furthermore, in some embodiments, the quick-release component 3 has a insertion slot 34 for the hook 11 to be inserted, a design based on further consideration of the reliability of the connection between the valve body 2 and the valve cover 1.

[0066] Specifically, the design of the insertion slot 34 provides a precise mating space for the hook 11. The hook 11 can be smoothly and accurately inserted into the insertion slot 34, thereby achieving a quick connection and fixation between the valve body 2 and the valve cover 1. As a preferred embodiment, the size and shape of the insertion slot 34 can be customized according to the actual size and shape of the hook 11 to ensure that the hook 11 can be fully inserted and tightly fitted, thereby improving the stability and reliability of the connection.

[0067] In the above embodiments of this application, a plurality of slots 21 are provided along the circumferential direction on the connecting surface of the valve body 2, and a quick-release piece 3 is provided in each slot 21. By increasing the number of quick-release pieces 3, the connection strength and stability between the valve body 2 and the valve cover 1 are improved.

[0068] As a specific implementation, four slots 21 can be evenly distributed on the connecting surface of the valve body 2, and a quick-release piece 3 can be installed in each slot 21. When it is necessary to remove the valve cover 1, simply lift the unlocking disc 4 to quickly separate the valve body 2 and the valve cover 1. This design not only improves the connection strength but also ensures the convenience of disassembly.

[0069] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A split-type detachable gate valve, characterized in that, include: Valve body (2) and valve cover (1); The connecting surface of the valve cover (1) is provided with a hook (11); The valve body (2) has a groove (21) on its connecting surface for accommodating the quick-release piece (3); The quick-release component (3) is movably disposed in the empty slot (21). The quick-release component (3) includes a hook groove (311) that cooperates with the hook (11), a spring (32) for driving it to reset, and a rubber shock absorber (33) for absorbing vibration. The valve body (2) and the valve cover (1) are provided with a positioning structure to prevent relative rotation between them.

2. The split-type detachable gate valve according to claim 1, characterized in that, It also includes an unlocking disc (4); the unlocking disc (4) is movably sleeved outside the valve body (2), and the unlocking disc (4) is used to drive multiple quick-release parts (3) to move synchronously.

3. The split-type detachable gate valve according to claim 1, characterized in that, The positioning structure includes a hexagonal protrusion (23) disposed on the connecting surface of the valve body (2) and a groove disposed on the connecting surface of the valve cover (1) that cooperates with the hexagonal protrusion (23).

4. The split-type detachable gate valve according to claim 1, characterized in that, The quick-release component (3) also includes a push rod (31) and a push piece (312) connected to the push rod (31); the hook groove (311) is provided on the push rod (31); one end of the spring (32) abuts against the push piece (312).

5. The split-type detachable gate valve according to claim 4, characterized in that, The valve body (2) has a side hole (22) that communicates with the slot (21); one end of the push rod (31) passes through the side hole (22) and extends out of the valve body (2).

6. The split-type detachable gate valve according to claim 5, characterized in that, The end of the push rod (31) extending out of the valve body (2) is configured as a dome structure.

7. The split-type detachable gate valve according to claim 1, characterized in that, The quick-release component (3) includes a side plate (35), on which a groove (332) is provided; the rubber shock absorber (33) is provided with a protrusion (331) that slides in cooperation with the groove (332).

8. The split-type detachable gate valve according to claim 7, characterized in that, Limiting posts (333) are provided on both sides of the rubber shock absorber (33).

9. The split-type detachable gate valve according to claim 1, characterized in that, The quick-release component (3) has a insertion slot (34) for the hook (11) to be inserted.

10. The split-type detachable gate valve according to claim 1, characterized in that, The valve body (2) has a plurality of slots (21) arranged along the circumferential direction on the connecting surface; each slot (21) is provided with a quick-release piece (3).

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