Sleeve quick-closing valve

Abstract

The invention relates to the technical field of quick-closing valves, and discloses a sleeve quick-closing valve which comprises a valve seat, a mounting block, a valve element and a fixing block. A sleeve is installed on the upper surface of the valve seat, an adjusting rod is screwed to the upper surface of the sleeve, and a lifting block is arranged at the bottom end of the adjusting rod. The mounting block is arranged at the bottom of the lifting block, a limiting rod is inserted into an inner cavity of the mounting block, a piston is mounted at the bottom end of the limiting rod, and a first spring is arranged between the piston and the mounting block; limiting strips are mounted on the two sides of the surface of the limiting rod, and limiting grooves are formed in the corresponding positions of an inner cavity of the mounting block. Mounting cylinders are uniformly distributed on the surfaces of the fixing blocks, second springs are mounted on the surfaces of the mounting cylinders, and extrusion plates are mounted at the output ends of the second springs. Through cooperation of all the structures, precise butt joint and separation of the valve element and the valve seat are achieved, movement stability and sealing reliability are guaranteed, opening and closing response efficiency is optimized, impact force is buffered, abrasion is reduced, the service life is prolonged, and operation stability and use reliability are improved.

Description

Technical Field

[0001] This invention relates to the field of quick-closing valve technology, specifically a sleeve quick-closing valve. Background Technology

[0002] Sleeve quick-closing valves are key devices in fluid pipeline systems used for rapid control of fluid flow. They are widely used in various industrial fields such as petroleum, chemical, and power. Their core performance is directly related to the operational safety of the pipeline system and the continuity of the production process, playing an irreplaceable role in various fluid transportation scenarios.

[0003] The existing sleeve quick-closing valve has a relatively simple valve core drive and reset structure design, lacking a dedicated limit guide component. This makes the valve core susceptible to displacement due to fluid pressure or assembly errors during its lifting and lowering motion, leading to a decrease in the docking accuracy between the valve core and the valve seat and making it difficult to guarantee sealing reliability. At the same time, the existing structure lacks components that can buffer the impact force of the valve core movement. Rigid collisions between components are prone to wear, and the elastic mechanism used for reset is not designed reasonably, failing to provide sufficient elastic support for the valve core's rapid reset. This results in low opening and closing response efficiency of the quick-closing valve. These structural defects ultimately make it difficult for the existing sleeve quick-closing valve to meet the high-efficiency requirements of industrial production in terms of operational stability and service life. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a sleeve quick-closing valve to solve the problems mentioned in the background art, such as decreased docking accuracy between the valve core and valve seat, difficulty in ensuring sealing reliability, and low opening and closing response efficiency. These structural defects ultimately make it difficult for existing sleeve quick-closing valves to meet the high-efficiency requirements of industrial production in terms of operational stability and service life.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sleeve-type quick-closing valve, comprising:

[0006] A valve seat, wherein a sleeve is installed on the upper surface of the valve seat, an adjusting rod is screwed onto the upper surface of the sleeve, and a lifting block is provided at the bottom end of the adjusting rod; An installation block is located at the bottom of the lifting block. A limiting rod is inserted into the inner cavity of the installation block. A piston is installed at the bottom end of the limiting rod. A first spring is installed between the piston and the installation block. The valve core is located at the bottom of the piston. Limiting strips are installed on both sides of the surface of the limiting rod. Limiting grooves are opened in the inner cavity of the mounting block at the corresponding positions of the limiting strips. A fixing block is disposed in the inner cavity of the piston. The surface of the fixing block is evenly distributed with mounting cylinders. A second spring is installed on the surface of each mounting cylinder. A compression plate is installed on the output end of each second spring.

[0007] Preferably, all the extrusion plates are arc-shaped and fit against the inner wall of the piston; The curved design perfectly fits the curved contour of the piston's inner wall, maximizing the contact area to improve sealing stability. It also disperses the force of the second spring, preventing component damage caused by localized stress concentration. In the fitted state, the extrusion plate remains tightly fitted to the piston's inner wall throughout the valve's opening and closing process, reducing media leakage channels. Furthermore, the curved structure reduces frictional losses during movement, extending the service life of both the extrusion plate and the piston. The curved surface also ensures even distribution of the second spring's force, further optimizing the sealing effect.

[0008] Preferably, each of the mounting cylinders has an insertion groove inside, and an insertion rod is inserted into each insertion groove. The insertion rod is connected to the surface of the extrusion plate. The plug-in slot and plug-in rod form a precision guiding mechanism that restricts the movement trajectory of the extrusion plate, preventing it from deviating or tilting under force and ensuring that the second spring force is transmitted in the preset direction. This plug-in connection facilitates the disassembly and maintenance of the mounting cylinder, plug-in rod, and extrusion plate. Simultaneously, the structural fit restricts the range of motion of the extrusion plate, preventing it from detaching from the mounting cylinder support and improving connection stability. It adapts to the stress variations under different valve operating conditions, ensuring stable operation of the sealing mechanism during high-frequency opening and closing, and reducing the risk of failure.

[0009] Preferably, each of the connecting ends of the plug rod is equipped with a retaining edge, and the retaining edge is inserted into the plug groove; The retaining flange acts as an axial limiter, effectively preventing the plug rod from detaching from the plug groove and avoiding loosening of the connection due to valve vibration or frequent operation. The flange fits snugly against the inner wall of the plug groove, dispersing the force transmitted by the plug rod, reducing localized wear between the plug rod and the groove, and providing buffer protection. Simultaneously, the flange structure does not affect the normal extension and retraction of the plug rod, ensuring uninterrupted guiding function, improving the long-term reliability of the plug-in structure composed of the plug rod and plug groove, and guaranteeing the continuous and effective operation of the sealing mechanism.

[0010] Preferably, a sealing gasket is installed on the surface of the piston, and the sealing gasket is in close contact with the inner wall of the sleeve; The sealing gasket is made of an elastic material suitable for the working medium. Its tight-contact design effectively prevents media leakage between the piston and sleeve, enhancing sealing performance. Its elastic properties compensate for assembly errors or minor wear between the piston and sleeve, maintaining a long-term sealing effect. Simultaneously, it reduces frictional damage between the piston and the inner wall of the sleeve during reciprocating motion, extending the service life of both the piston and sleeve. The sealing gasket also possesses resistance to media corrosion and aging, adapting to different temperature and pressure conditions to ensure the valve's sealing reliability in complex environments.

[0011] Preferably, a baffle is installed at the top of the limiting rod, and a stop bar is installed in the inner cavity of the mounting block, wherein the stop bar is a ring design; The annular baffle and the baffle plate work together to form a double limit, precisely restricting the lifting and lowering stroke of the limit rod and preventing rigid collisions between the valve core and the valve seat, thus providing a buffer protection function. The annular structure ensures even force distribution on the baffle plate, reducing local stress concentration and improving the load-bearing capacity of the limit structure composed of the limit rod and the mounting block, adapting to the impact force during rapid valve opening and closing. This design also prevents component deformation caused by excessive movement of the limit rod, ensuring the connection stability between the limit rod and the valve core, and extending the overall service life of the valve.

[0012] Preferably, a sealing block is installed on the upper surface of the valve core, the surface of the sealing block is arc-shaped, and the sealing block is in close contact with the inner wall of the valve seat; The curved surface perfectly matches the inner curved surface of the valve seat, increasing the sealing contact area between the sealing block and the valve seat, improving sealing reliability, and effectively blocking the medium flow path. The sealing block has good elastic deformation capability, which can compensate for slight machining errors or wear on the inner wall of the valve seat and reduce sealing gaps. The curved structure can disperse medium pressure when the valve is closed, reducing local wear between the sealing block and the valve seat. At the same time, its material is resistant to medium corrosion and aging, adapting to different operating conditions and ensuring the long-term stable sealing performance of the valve.

[0013] Preferably, a connecting block is installed at the bottom end of the adjusting rod, and a connecting cylinder is installed on the upper surface of the lifting block, with the connecting block inserted into the interior of the connecting cylinder; The plug-in connection between the connecting block and the connecting cylinder ensures reliable transmission between the adjusting rod and the lifting block, guaranteeing smooth conversion of the adjusting rod's rotational movement into the linear lifting of the lifting block. This results in precise and efficient transmission. The plug-in structure facilitates the assembly, disassembly, and maintenance of the adjusting rod, connecting block, lifting block, and connecting cylinder, compensating for minor coaxiality errors during installation and reducing transmission jamming. The close fit design between the connecting block and the inner wall of the connecting cylinder distributes stress, enhancing the load-bearing capacity of the connection structure. This adapts to different valve adjustment stroke requirements, ensuring precise and controllable valve core opening and closing. Furthermore, the connecting block and connecting cylinder are movably connected; when the adjusting rod rotates, it drives the connecting block to rotate, but the rotation of the connecting block does not drive the connecting cylinder, thus preventing the lifting block from rotating and avoiding displacement, ensuring stable lifting.

[0014] Preferably, sliders are installed on both sides of the surface of the lifting block, and grooves are formed on both sides of the inner wall of the sleeve; The slider and groove form a guiding mechanism, providing a precise trajectory for the lifting block's movement, preventing it from deviating or tilting, and ensuring the accuracy of the valve core's opening and closing actions. The sliding fit reduces the contact area between the lifting block and the inner wall of the sleeve, lowering frictional resistance and wear, and improving the smoothness of the lifting block's movement. The groove's structural design prevents impurities from entering the clearance between the slider and the groove, protecting the guiding structure. Simultaneously, the slider material possesses wear-resistant properties, making it suitable for frequent valve opening and closing conditions, thus improving the stability and service life of the guiding mechanism.

[0015] Preferably, the connecting ends of the valve seats are all equipped with flanges, and the surfaces of the flanges are all equipped with sealing rings; The flange is compatible with universal piping connection standards, providing a reliable interface for the connection between the valve seat and the pipeline, facilitating on-site installation, disassembly, and maintenance. The sealing ring enhances the sealing performance of the flange connection surface, preventing media leakage in the flange connection gap. Its material is resistant to media corrosion and aging, and is suitable for different working media and temperature conditions. The flange has high structural strength, capable of withstanding the pressure and vibration of the piping system, improving the overall stability of the valve-pipeline connection, preventing loosening due to uneven stress, and ensuring the safe operation of the piping system.

[0016] Compared with the prior art, the present invention provides a sleeve quick-closing valve, which has the following beneficial effects: This sleeve-type quick-closing valve features a sleeve that screws onto an adjusting rod, allowing the lifting block to move the bottom mounting block for position adjustment. This, in turn, works with a limit rod inserted into the mounting block's inner cavity and a piston at the bottom to achieve precise docking and separation of the valve core and valve seat. Simultaneously, the added limit strip and limit groove restrict the movement trajectory of the limit rod, preventing it from shifting during lifting and lowering, ensuring smooth piston movement, and improving the reliability of the valve core seal. The first spring provides elastic restoring force, helping the piston and valve core to quickly reset when operating conditions change, optimizing the valve's opening and closing response efficiency. The mounting sleeve, in conjunction with the second spring and the compression plate, uses the elastic extension and contraction characteristics of the second spring to buffer the impact force during piston movement, reducing rigid collisions between components, lowering wear, and enhancing the adaptability of the piston's internal components, extending the overall device's service life. Through the synergistic effect of these structures, the operational stability and reliability of the quick-closing valve are effectively improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the adjusting rod of the present invention; Figure 4 This is a schematic diagram of the installation structure of the valve core of the present invention; Figure 5This is a schematic diagram of the mounting block of the present invention; Figure 6 This is a schematic diagram of the piston structure of the present invention; Figure 7 This is an exploded perspective view of the connector rod of the present invention.

[0018] In the diagram: 1. Valve seat; 2. Sleeve; 3. Adjusting rod; 4. Lifting block; 5. Mounting block; 6. Limiting rod; 7. Piston; 8. First spring; 9. Valve core; 10. Limiting strip; 11. Limiting groove; 12. Fixing block; 13. Mounting cylinder; 14. Second spring; 15. Extrusion plate; 16. Insertion groove; 17. Insertion rod; 18. Stop; 19. Sealing gasket; 20. Baffle; 21. Stop bar; 22. Sealing block; 23. Connecting block; 24. Connecting cylinder; 25. Sliding block; 26. Slide groove; 27. Flange; 28. Sealing ring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides a technical solution: a sleeve-type quick-closing valve. Please refer to [link / reference]. Figure 1 It includes a valve seat 1, a sleeve 2 mounted on the upper surface of the valve seat 1, and an adjusting rod 3 screwed onto the upper surface of the sleeve 2. Please refer to [link / reference]. Figure 2 The bottom end of the adjusting rod 3 is provided with a lifting block 4; Mounting block 5 is located at the bottom of lifting block 4. A limiting rod 6 is inserted into the inner cavity of mounting block 5. A piston 7 is installed at the bottom end of the limiting rod 6. A first spring 8 is installed between the piston 7 and mounting block 5. Valve core 9 is located at the bottom of piston 7. Please refer to [link / reference]. Figure 4 Limiting strips 10 are installed on both sides of the surface of the limiting rod 6. Please refer to [link / reference]. Figure 5 Limit grooves 11 are provided in the inner cavity of the mounting block 5 and at the corresponding positions of the limiting strip 10; Please see Figure 6 The fixing block 12 is set in the inner cavity of the piston 7. The surface of the fixing block 12 is evenly distributed with mounting cylinders 13. The surface of each mounting cylinder 13 is equipped with a second spring 14. The output end of each second spring 14 is equipped with a compression plate 15.

[0021] By rotating the adjusting rod 3 screwed onto the upper surface of the sleeve 2, the lifting block 4 at its bottom end is driven to move up and down along the inner cavity of the sleeve 2, thereby driving the mounting block 5 connected to the bottom of the lifting block 4 to rise and fall synchronously. The limiting rod 6 inserted in the inner cavity of the mounting block 5, under the guidance of the limiting strip 10 and the corresponding limiting groove 11 of the mounting block 5, rises and falls smoothly with the mounting block 5 and avoids relative rotation. The piston 7 at the bottom of the limiting rod 6 drives the valve core 9 at the bottom to move closer to or away from the valve seat 1, thereby realizing the opening or closing action of the valve. Among them, the first spring 8 between the piston 7 and the mounting block 5 is always in an elastic extension and contraction state during the opening and closing of the valve core 9, providing a buffering and reset force for the valve core 9. At the same time, the second spring 14 on the mounting cylinder 13 evenly distributed on the surface of the fixing block 12 in the inner cavity of the piston 7 extends and contracts synchronously, driving the extrusion plate 15 to always be in contact with the inner cavity wall of the piston 7 or the corresponding sealing surface. The elastic preload of the second spring 14 enhances the sealing performance and buffering stability of the valve core 9 during opening and closing, and finally completes the rapid opening and closing control of the valve.

[0022] The sleeve 2 installed on the upper surface of the valve seat 1 is screwed into the adjusting rod 3. The lifting block 4 at the bottom of the adjusting rod 3 can drive the mounting block 5 at the bottom to achieve position adjustment. This, in conjunction with the limiting rod 6 inserted in the inner cavity of the mounting block 5 and the piston 7 at the bottom, achieves precise docking and separation between the valve core 9 and the valve seat 1. The limiting strips 10 on both sides of the surface of the limiting rod 6 are adapted to the corresponding limiting grooves 11 opened in the inner cavity of the mounting block 5, which can limit the movement trajectory of the limiting rod 6, prevent it from deviating during lifting and lowering, ensure the smooth movement of the piston 7, and improve the sealing reliability of the valve core 9. The piston 7 and the mounting block 5 are connected by a... The first spring 8 provides elastic restoring force, helping the piston 7 and valve core 9 to quickly reset when the working conditions change, thus optimizing the valve's opening and closing response efficiency. The mounting cylinders 13 evenly distributed on the surface of the fixing block 12 in the inner cavity of the piston 7, together with the second spring 14 and the pressing plate 15, can buffer the impact force during the movement of the piston 7 through the elastic extension and contraction characteristics of the second spring 14, reduce rigid collisions between components, reduce wear, and at the same time enhance the adaptability of the assembly of the inner cavity components of the piston 7, extend the service life of the overall device. Under the synergistic effect of the various structures, the operational stability and reliability of the quick-closing valve are effectively improved.

[0023] All extrusion plates 15 are arc-shaped and fit against the inner wall of piston 7. The curved design perfectly fits the curved contour of the piston 7's inner wall, maximizing the contact area to improve sealing stability. It also disperses the force of the second spring 14, preventing component damage caused by localized stress concentration. In the fitted state, the compression plate 15 remains tightly fitted to the inner wall of the piston 7 throughout the valve's opening and closing process, reducing media leakage channels. Furthermore, the curved structure reduces frictional losses during movement, extending the service life of both the compression plate 15 and the piston 7. The curved surface also ensures even distribution of the second spring 14's elasticity, further optimizing the sealing effect.

[0024] Please see Figure 7 Each of the mounting cylinders 13 has an insertion slot 16 inside, and each insertion slot 16 has an insertion rod 17 inserted inside. The insertion rod 17 is connected to the surface of the extrusion plate 15. The insertion slot 16 and insertion rod 17 form a precision guiding mechanism, which restricts the movement trajectory of the extrusion plate 15, preventing it from shifting or tilting under force, and ensuring that the spring force of the second spring 14 is transmitted in a preset direction. This plug-in connection facilitates the disassembly and maintenance of the mounting cylinder 13, insertion rod 17, and extrusion plate 15. Simultaneously, the structural fit restricts the range of motion of the extrusion plate 15, preventing it from detaching from the support of the mounting cylinder 13 and improving connection stability. It adapts to the stress changes under different valve operating conditions, ensuring stable operation of the sealing mechanism during high-frequency opening and closing, and reducing the risk of failure.

[0025] All connecting ends of the plug rod 17 are equipped with a retaining edge 18, and the retaining edge 18 is inserted into the inside of the plug groove 16. The retaining flange 18 serves as an axial limiter, effectively preventing the insertion rod 17 from detaching from the insertion groove 16 and avoiding loosening of the connection due to valve vibration or frequent operation. The retaining flange 18 fits snugly against the inner wall of the insertion groove 16, dispersing the force transmitted by the insertion rod 17, reducing localized wear between the insertion rod 17 and the insertion groove 16, and providing buffer protection. Simultaneously, the retaining flange 18 structure does not affect the normal extension and retraction of the insertion rod 17, ensuring uninterrupted guiding function, improving the long-term reliability of the insertion structure composed of the insertion rod 17 and the insertion groove 16, and guaranteeing the continuous and effective operation of the sealing mechanism.

[0026] Please see Figure 6 A sealing gasket 19 is installed on the surface of the piston 7, and the sealing gasket 19 is in close contact with the inner wall of the sleeve 2. The sealing gasket 19 is made of an elastic material suitable for the working medium. Its tight-contact design prevents media leakage between the piston 7 and the sleeve 2, enhancing sealing performance. Its elastic properties compensate for assembly errors or minor wear between the piston 7 and the sleeve 2, maintaining a long-term sealing effect. It also reduces frictional damage between the piston 7 and the inner wall of the sleeve 2 during reciprocating motion, extending the service life of both the piston 7 and the sleeve 2. The sealing gasket 19 also possesses resistance to media corrosion and aging, adapting to different temperature and pressure conditions to ensure the valve's sealing reliability in complex environments.

[0027] Please see Figure 4 A baffle 20 is installed at the top of the limiting rod 6. Please refer to [link / reference]. Figure 5 The inner cavity of the mounting block 5 is equipped with a baffle 21, which is a ring-shaped design; The annular baffle 21 and the baffle 20 work together to form a double limit, precisely restricting the lifting and lowering stroke of the limit rod 6, preventing rigid collision between the valve core 9 and the valve seat 1, and providing a buffer protection function. The annular structure ensures that the force on the baffle 20 is evenly distributed, reducing local stress concentration and improving the load-bearing capacity of the limit structure composed of the limit rod 6 and the mounting block 5, adapting to the impact force during rapid opening and closing of the valve. This design also prevents component deformation caused by excessive movement of the limit rod 6, ensuring the connection stability between the limit rod 6 and the valve core 9, and extending the overall service life of the valve.

[0028] Please see Figure 4 A sealing block 22 is installed on the upper surface of the valve core 9. The surface of the sealing block 22 is arc-shaped and the sealing block 22 is in close contact with the inner wall of the valve seat 1. The arc-shaped surface perfectly matches the curved inner wall of valve seat 1, increasing the sealing contact area between sealing block 22 and valve seat 1, improving sealing reliability, and effectively blocking the medium flow channel. Sealing block 22 has good elastic deformation capability, which can compensate for minor machining errors or wear on the inner wall of valve seat 1, reducing sealing gaps. The arc-shaped structure can disperse medium pressure when the valve is closed, reducing localized wear between sealing block 22 and valve seat 1. Simultaneously, its material is resistant to medium corrosion and aging, adapting to different operating conditions and ensuring long-term stable sealing performance of the valve.

[0029] Please see Figure 3 A connecting block 23 is installed at the bottom of the adjusting rod 3, and a connecting cylinder 24 is installed on the upper surface of the lifting block 4. The connecting block 23 is inserted into the interior of the connecting cylinder 24. The plug-in connection between connecting block 23 and connecting cylinder 24 ensures reliable transmission between adjusting rod 3 and lifting block 4, guaranteeing smooth conversion of the rotational motion of adjusting rod 3 into the linear lifting motion of lifting block 4, resulting in precise and efficient transmission. The plug-in structure facilitates the assembly, disassembly, and maintenance of adjusting rod 3, connecting block 23, lifting block 4, and connecting cylinder 24, compensating for minor coaxiality errors during installation and reducing transmission jamming. The close fit design of the inner walls of connecting block 23 and connecting cylinder 24 distributes stress, enhances the load-bearing capacity of the connection structure, adapts to different valve adjustment stroke requirements, and ensures precise and controllable opening and closing of valve core 9. Furthermore, the movable connection between connecting block 23 and connecting cylinder 24 means that while the adjusting rod 3 rotates, it drives the connecting block 23 to rotate, but the rotation of the connecting block 23 does not drive the connecting cylinder 24, thus preventing the lifting block 4 from rotating and avoiding offset, ensuring stable lifting.

[0030] Slider 25 is installed on both sides of the surface of the lifting block 4. Please refer to [link / reference]. Figure 2 The inner walls on both sides of the sleeve 2 are provided with sliding grooves 26; The slider 25 and the groove 26 form a guiding mechanism, providing a precise trajectory for the lifting block 4's lifting movement, preventing the lifting block 4 from deviating or tilting, and ensuring the accuracy of the valve core 9's opening and closing actions. The sliding fit reduces the contact area between the lifting block 4 and the inner wall of the sleeve 2, reducing frictional resistance and wear, and improving the smoothness of the lifting block 4's movement. The groove 26's structural design prevents impurities from entering the gap between the slider 25 and the groove 26, protecting the guiding structure. Simultaneously, the slider 25's material has wear-resistant properties, making it suitable for frequent valve opening and closing conditions, improving the stability and service life of the guiding mechanism.

[0031] Please see Figure 1 All connecting ends of valve seat 1 are equipped with flanges 27, and all surfaces of flanges 27 are equipped with sealing rings 28. Flange 27 is compatible with general pipeline connection standards, providing a reliable interface for the connection between valve seat 1 and the pipeline, facilitating on-site installation, disassembly, and maintenance. Sealing ring 28 enhances the sealing performance of the flange 27 connection surface, preventing media leakage in the flange 27 connection gap. Its material is resistant to media corrosion and aging, suitable for different working media and temperature conditions. Flange 27 has high structural strength, capable of withstanding the pressure and vibration of the pipeline system, improving the overall stability of the valve-pipeline connection, preventing loosening due to uneven stress, and ensuring the safe operation of the pipeline system.

[0032] This scheme: After the flange 27 of the valve seat 1 is connected to the pipeline and an initial seal is achieved with the sealing ring 28, the adjusting rod 3 screwed onto the rotating sleeve 2 has its bottom connecting block 23 inserted into the connecting cylinder 24 of the lifting block 4, converting the rotational motion into the linear lifting motion of the lifting block 4. The sliders 25 on both sides of the lifting block 4 are precisely guided along the sliding grooves 26 of the sleeve 2 to prevent deviation. The lifting block 4 drives the bottom mounting block 5 to move synchronously. The limiting rod 6 inside the mounting block 5 is adapted to the limiting groove 11 of the mounting block 5 through the limiting strips 10 on both sides, limiting the movement trajectory and ensuring stability. At the same time, the baffle 20 at the top of the limiting rod 6 cooperates with the annular baffle 21 of the mounting block 5 to limit the lifting stroke and prevent rigid collision between the valve core 9 and the valve seat 1. The bottom end of the limiting rod 6 drives the movable... When piston 7 moves, the sealing gasket 19 on the surface of piston 7 comes into close contact with the inner wall of sleeve 2 to block media leakage. The valve core 9 at the bottom of piston 7 achieves precise sealing by fitting with the inner wall of valve seat 1 through arc-shaped sealing block 22. During the movement, the first spring 8 between mounting block 5 and piston 7 provides elastic restoring force to help valve core 9 respond quickly to changes in working conditions. The mounting cylinder 13 on the fixing block 12 inside piston 7 is precisely guided to the extrusion plate 15 through the insertion groove 16 and the insertion rod 17. The retaining edge 18 of the insertion rod 17 prevents it from falling off. The second spring 14 fits against the inner wall of piston 7 through the arc-shaped extrusion plate 15 to buffer the impact of movement and disperse stress, reducing component wear. All structures work together to achieve precise opening and closing, reliable sealing and stable operation of the quick-closing valve, extending the overall service life.

[0033] 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, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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.

[0034] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sleeve-type quick-closing valve, characterized in that, include: Valve seat (1), a sleeve (2) is installed on the upper surface of the valve seat (1), an adjusting rod (3) is screwed onto the upper surface of the sleeve (2), and a lifting block (4) is provided at the bottom end of the adjusting rod (3). Mounting block (5) is set at the bottom of lifting block (4). A limiting rod (6) is inserted into the inner cavity of the mounting block (5). A piston (7) is installed at the bottom end of the limiting rod (6). A first spring (8) is installed between the piston (7) and the mounting block (5). The valve core (9) is located at the bottom of the piston (7). Limiting strips (10) are installed on both sides of the surface of the limiting rod (6). Limiting grooves (11) are opened in the inner cavity of the mounting block (5) and at the corresponding positions of the limiting strips (10). A fixing block (12) is set in the inner cavity of the piston (7). The surface of the fixing block (12) is evenly provided with mounting cylinders (13). The surface of each mounting cylinder (13) is equipped with a second spring (14). The output end of each second spring (14) is equipped with a compression plate (15).

2. The sleeve quick-closing valve according to claim 1, characterized in that: All the extrusion plates (15) are arc-shaped and are in contact with the inner wall of the piston (7).

3. The sleeve quick-closing valve according to claim 1, characterized in that: The mounting cylinder (13) is provided with a insertion slot (16) inside each of the insertion slots (16), and an insertion rod (17) is inserted into each of the insertion slots (16). The insertion rod (17) is connected to the surface of the extrusion plate (15).

4. A sleeve quick-closing valve according to claim 3, characterized in that: Each of the connecting ends of the plug rod (17) is equipped with a retaining edge (18), and the retaining edge (18) is inserted into the interior of the plug groove (16).

5. A sleeve-type quick-closing valve according to claim 1, characterized in that: A sealing gasket (19) is installed on the surface of the piston (7), and the sealing gasket (19) is in close contact with the inner wall of the sleeve (2).

6. A sleeve-type quick-closing valve according to claim 1, characterized in that: The top of the limiting rod (6) is equipped with a baffle (20), and the inner cavity of the mounting block (5) is equipped with a baffle (21), which is a ring design.

7. A sleeve quick-closing valve according to claim 1, characterized in that: A sealing block (22) is installed on the upper surface of the valve core (9). The surface of the sealing block (22) is arc-shaped and the sealing block (22) is in close contact with the inner wall of the valve seat (1).

8. A sleeve-type quick-closing valve according to claim 1, characterized in that: A connecting block (23) is installed at the bottom of the adjusting rod (3), and a connecting cylinder (24) is installed on the upper surface of the lifting block (4). The connecting block (23) is inserted into the interior of the connecting cylinder (24).

9. A sleeve-type quick-closing valve according to claim 1, characterized in that: The lifting block (4) has sliders (25) installed on both sides of its surface, and the sleeve (2) has grooves (26) on both sides of its inner wall.

10. A sleeve quick-closing valve according to claim 1, characterized in that: The valve seat (1) is equipped with a flange (27) at the connection end, and a sealing ring (28) is installed on the surface of the flange (27).

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