Disclosed is a flat gate valve with a clutch.

Abstract

The present application relates to the field of flat gate valve, provide a kind of flat gate valve with clutch, including valve body, valve body is connected with valve seat and support, valve seat is connected with valve plate, valve plate is connected with valve stem, valve stem extends to support, valve stem is connected with hand wheel;Clutch assembly is equipped between hand wheel and support, torque adjusting assembly is equipped between hand wheel and clutch assembly, lubricating assembly is equipped on clutch assembly.The present application can automatically remove power transmission when the closing resistance exceeds the set range during the closing process of flat gate valve, to avoid excessive operating torque acting on the internal structure of valve;At the same time, the disengagement torque can be adjusted by torque adjusting assembly, and the long-term operation stability of clutch assembly is improved by using lubricating assembly, so as to improve the safety, reliability and service life of flat gate valve.

Description

Technical Field

[0001] This invention relates to the field of flat gate valve technology, and more specifically to a flat gate valve with a clutch. Background Technology

[0002] A flat gate valve is a common type of valve used for controlling the flow of media in pipelines. It typically opens or closes by moving the valve stem via a handwheel, causing the valve plate to move along the valve body. In actual use, especially when closing the valve, the resistance on the valve stem gradually increases as the sealing pressure between the valve plate and the valve seat increases. If the operator continuously applies a large operating torque, the internal structures of the valve plate, valve seat, and valve stem can be subjected to excessive forces, leading to deformation, damage to components, or a reduction in the valve's service life.

[0003] Some existing flat gate valves typically use a fixed transmission structure, where the operating torque input by the handwheel is directly transmitted to the valve stem. When the closing resistance changes, the protection torque cannot be adjusted according to the actual working conditions. As a result, when the valve is running under different specifications and pressure environments, it is difficult to meet both the normal closing requirements and the overload protection requirements, which affects the valve's applicability and operational reliability.

[0004] In addition, during long-term operation, the internal transmission components of the flat gate valve are prone to wear and jamming at the clutch or transmission engagement positions due to factors such as lubricant loss and increased friction. This reduces the sensitivity of the transmission mechanism and affects the stability of the valve opening and closing process.

[0005] Therefore, existing flat gate valves still suffer from insufficient overload protection, inflexible adjustment of operating torque, and low long-term reliability of transmission components. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention aims to provide a flat gate valve with a clutch. To solve these problems, this invention employs the following technical solution: A flat gate valve with a clutch includes a valve body, a valve seat and a bracket connected to the valve body, a valve plate connected to the valve seat, a valve stem connected to the valve plate, the valve stem extending into the bracket, and a handwheel connected to the bracket. A clutch assembly is provided between the handwheel and the valve stem, a torque adjustment assembly is provided between the handwheel and the clutch assembly, and a lubrication assembly is provided on the clutch assembly.

[0007] Optionally, the clutch assembly includes a hollow transmission body, needle rollers, and a T-shaped nut. The hollow transmission body is connected to the handwheel, and the T-shaped nut is connected to the bracket. A first clutch groove is formed on the bottom wall of the hollow transmission body, and a second clutch groove is formed on the top wall of the T-shaped nut. The needle rollers are located between the first and second clutch grooves, and the T-shaped nut is connected to the valve stem.

[0008] Optionally, the torque adjustment assembly includes a T-shaped cap, an internal hexagon screw, a spring, and a steel ball. The T-shaped cap is connected to the hollow transmission body, the internal hexagon screw is connected to the T-shaped cap, the internal hexagon screw is connected to the spring, the steel ball is connected to the spring, and the steel ball abuts against the hollow transmission body.

[0009] Optionally, the lubrication assembly includes an O-ring and an oil reservoir formed on a T-nut, with the O-ring connected to the oil reservoir.

[0010] Optionally, a protective cover is attached to the handwheel.

[0011] Optionally, a valve cover is connected to the valve body.

[0012] Optionally, the valve body is connected to a sealing ring, a Y-ring, and a packing gasket. The sealing ring, Y-ring, and packing gasket are all located between the valve body and the valve stem. Two or more O-rings are connected to the sealing ring.

[0013] Optionally, an O-ring is provided between the valve body and the valve seat, and a sealing ring is provided between the valve seat and the valve plate.

[0014] Optionally, the valve body includes an upper shell and a lower shell, which are connected by a middle flange gasket, a second nut, and a second double-ended stud.

[0015] Optionally, the upper shell and the bracket are connected by a nut and a stud.

[0016] The present invention has the following beneficial effects: During the closing process of the flat gate valve, when the closing resistance exceeds the set range, the clutch assembly can automatically disengage the power transmission to avoid excessive operating torque acting on the internal structure of the valve. At the same time, the torque adjustment assembly enables adjustable disengagement torque, and the lubrication assembly improves the long-term operational stability of the clutch assembly, thereby improving the safety, reliability and service life of the flat gate valve. Attached Figure Description

[0017] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the fully open state structure of a flat gate valve with a clutch according to the present invention. Figure 2 This is a partially enlarged view of a flat gate valve with a clutch according to the present invention; Figure 3 This is a partially enlarged view of a flat gate valve with a clutch according to the present invention; Figure 4 This is a partially enlarged view of a flat gate valve with a clutch according to the present invention; Figure 5 This is a partially enlarged view of a flat gate valve with a clutch according to the present invention; Figure 6 This is a schematic diagram of the fully closed state structure of a flat gate valve with a clutch according to the present invention.

[0019] Reference numerals in the attached diagram: 1. Protective cover; 2. Handwheel; 3. O-ring one; 4. Bracket; 5. Valve stem; 6. Nut one; 7. Double-ended stud one; 8. O-ring two; 9. Sealing ring; 10. Y-ring; 11. Packing gasket; 12. Valve cover; 13. Middle flange gasket; 14. Nut two; 15. Double-ended stud two; 16. Valve plate; 17. Sealing ring; 18. O-ring three; 19. Valve seat; 20. Valve body; 21. Hollow transmission body; 211. First clutch groove; 22. Needle roller; 23. T-nut; 231. Second clutch groove; 24. T-shaped gland; 25. Socket head screw; 26. Spring; 27. Steel ball; 28. Oil reservoir. Detailed Implementation

[0020] 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.

[0021] In the description of this invention, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] This invention can be applied to fluid transportation in manufacturing, and also to the field of wastewater control and treatment for wastewater control.

[0024] like Figures 1-5 As shown, a flat gate valve with a clutch includes a valve body 20, a valve seat 19 and a bracket 4 connected to the valve body 20, a valve plate 16 connected to the valve seat 19, a valve stem 5 connected to the valve plate 16, the valve stem 5 extending into the bracket 4, and a handwheel 2 connected to the bracket 4. A clutch assembly is provided between the handwheel 2 and the valve stem 5, a torque adjustment assembly is provided between the handwheel 2 and the clutch assembly, and a lubrication assembly is provided on the clutch assembly.

[0025] Figures 1-5 This is the fully open state of the flat gate valve. Figure 6 This refers to the fully closed state of a flat gate valve with a clutch.

[0026] Based on the above scheme, in some embodiments, the clutch assembly includes a hollow transmission body 21, a needle roller 22, and a T-shaped nut 23. The hollow transmission body 21 is connected to the handwheel 2, and the T-shaped nut 23 is connected to the bracket 4. The bottom wall of the hollow transmission body 21 has a first clutch groove 211, and the top wall of the T-shaped nut 23 has a second clutch groove 231. The needle roller 22 is located between the first clutch groove 211 and the second clutch groove 231, and the T-shaped nut 23 is connected to the valve stem 5.

[0027] In some preferred embodiments, the torque adjustment assembly includes a T-shaped cap 24, an internal hexagon screw 25, a spring 26, and a steel ball 27. The T-shaped cap 24 is connected to the hollow transmission body 21, the internal hexagon screw 25 is connected to the T-shaped cap 24, the internal hexagon screw 25 is connected to the spring 26, the steel ball 27 is connected to the spring 26, and the steel ball 27 abuts against the hollow transmission body 21.

[0028] In a preferred embodiment of the lubrication assembly, the lubrication assembly includes an O-ring 3 and an oil reservoir 28 formed on a T-nut 23, with the O-ring 3 connected to the oil reservoir 28.

[0029] Optionally, a protective cover 1 is connected to the handwheel 2.

[0030] A valve cover 12 is connected to the valve body 20.

[0031] The valve body 20 is connected to a sealing ring 9, a Y-ring 10 and a packing gasket 11. The sealing ring 9, the Y-ring 10 and the packing gasket 11 are all located between the valve body 20 and the valve stem 5. The sealing ring 9 is connected to two or more O-rings 8.

[0032] An O-ring 18 is provided between the valve body 20 and the valve seat 19, and a sealing ring 17 is provided between the valve seat 19 and the valve plate 16.

[0033] The valve body 20 includes an upper shell and a lower shell, which are connected by a middle flange gasket 13, a nut 14, and a double-ended stud 15.

[0034] The upper shell and the bracket 4 are connected by a nut-6 and a double-ended stud-7.

[0035] Implementation process: refer to Figure 5 The depth H of the first clutch groove 211 of the hollow cylinder is embedded in the needle roller 22, which is less than the gap L between the T-shaped cap 24 and the hollow transmission body 21.

[0036] refer to Figures 1-4 The bracket 4 is internally designed with a clutch assembly, which consists of a hollow transmission body 21, a needle roller 22, and a T-nut 23. When the handwheel 2 is rotated, it drives the hollow transmission body 21 to rotate synchronously. The first clutch groove 211 at the bottom of the hollow transmission body 21 and the second clutch groove 231 at the top of the T-nut 23 together form the installation space for the needle roller 22. The needle roller 22 realizes the power transmission between the hollow transmission body 21 and the T-nut 23, thereby driving the valve stem 5 to move downward, causing the valve plate 16 to move along the inside of the valve body 20, realizing the opening or closing of the flat gate valve.

[0037] When the valve stem 5 moves the valve plate 16 to the closed position, the T-nut 23 is restricted by the valve stem 5 and cannot continue to rotate. If the handwheel 2 is continued to rotate, the handwheel 2 will drive the hollow transmission body 21 to continue to rotate. Since the needle roller 22 is located between the first clutch groove 211 and the second clutch groove 231, and the surface of the needle roller 22 is curved, when the T-nut 23 cannot continue to rotate, the hollow transmission body 21 is guided by the curved surface of the needle roller 22 and moves axially upward. During the upward movement of the hollow transmission body 21, the spring 26 is compressed and gradually approaches the T-shaped pressure cap 24, so that the gap L between the hollow transmission body 21 and the T-shaped pressure cap 24 gradually decreases. The greater the torque input by the handwheel 2, the greater the axial force on the hollow transmission body 21. The greater the force, the greater the compression of the spring 26. When the axial movement distance of the hollow transmission body 21 exceeds the depth H of the first clutch groove 211, the needle roller 22 disengages from the first clutch groove 211 and abuts against the bottom wall of the hollow transmission body 21, thereby releasing the circumferential power transmission between the hollow transmission body 21 and the T-nut 23. After that, when the handwheel 2 is turned, the hollow transmission body 21 rotates freely relative to the T-nut 23 with the handwheel 2. The T-nut 23 and the valve stem 5 are no longer driven by the closing direction, thereby limiting the maximum closing torque transmitted to the valve stem 5, valve plate 16 and valve seat 19. This prevents the operator from continuously turning the handwheel 2, causing overload deformation and damage to the valve stem 5, valve plate 16 or valve seat 19, and realizing mechanical overload protection during the valve closing process.

[0038] The bracket 4 is equipped with a torque adjustment component, which consists of a T-shaped pressure cap 24, an internal hexagon screw 25, a spring 26, and a steel ball 27. By adjusting the installation position of the internal hexagon screw 25, the compression degree of the spring 26 can be changed, allowing the spring 26 to apply different amounts of elastic force to the steel ball 27. This, in turn, adjusts the contact pressure between the steel ball 27 and the hollow transmission body 21, thereby adjusting the disengagement torque of the clutch assembly to adapt to the closing torque requirements of different valve specifications and under different operating conditions.

[0039] During the valve opening process, the operator turns the handwheel 2, which drives the hollow transmission body 21 to rotate through the clutch assembly. The needle roller 22 re-enters the first clutch groove 211, and the clutch assembly maintains the power transmission state, so that the valve plate 16 gradually moves away from the valve seat 19, enabling the valve to open stably.

[0040] The T-nut 23 has an oil reservoir 28 inside, and an O-ring 3 is connected inside the oil reservoir 28. The O-ring 3 holds the lubricating oil, allowing the lubricating oil to be stored in the oil reservoir 28 for a long time. This continuously lubricates the moving contact area between the hollow transmission body 21, the needle roller 22, and the T-nut 23, reducing friction and extending the service life of the clutch assembly. It also reduces jamming caused by long-term operation.

[0041] A valve seat 19 and a bracket 4 are connected to the valve body 20. The valve seat 19 cooperates with the valve plate 16 to realize fluid flow control. An O-ring 18 is provided between the valve body 20 and the valve seat 19 to improve the sealing performance of the connection position. A sealing ring 17 is provided between the valve seat 19 and the valve plate 16 to enhance the sealing effect in the closed state.

[0042] A sealing ring 9, a Y-ring 10, and a packing gasket 11 are provided between the valve body 20 and the valve stem 5. The sealing ring 9, the Y-ring 10, and the packing gasket 11 form a multi-stage sealing structure. At the same time, multiple O-rings 8 are connected to the sealing ring 9 to improve the sealing reliability during the movement of the valve stem 5 and prevent media leakage.

[0043] The valve body 20 includes an upper shell and a lower shell that are connected to each other. The upper shell and the lower shell are fixedly connected by a middle flange gasket 13, a second nut 14 and a second double-ended stud 15 to facilitate the installation and maintenance of the valve body 20. The upper shell is connected to the bracket 4 by a first nut 6 and a second double-ended stud 7 to improve the connection stability between the bracket 4 and the valve body 20.

[0044] When the valve is opened, the bottom end face of bracket 4 is subjected to force, and there is no limit to the input torque, ensuring that the valve opens and the top seal is effective.

[0045] Beneficial effects of this invention: Clutch protection effect: By setting a clutch assembly, the power transmission between the handwheel 2 and the valve stem 5 can be automatically released according to the resistance. When the closing resistance exceeds the set range, the hollow transmission body 21 disengages from the T-nut 23, allowing the handwheel 2 to rotate freely, thus avoiding excessive torque acting on the valve plate 16, valve seat 19 and valve stem 5, and improving the safety and reliability of the flat gate valve.

[0046] Torque adjustment effect: By setting up a torque adjustment component, the present invention uses a T-shaped pressure cap 24, an internal hex screw 25, a spring 26 and a steel ball 27 to adjust the clutch disengagement torque, so that the clutch protection threshold can be adjusted according to different valve specifications and operating conditions, thereby improving the applicability and operational stability of the flat gate valve.

[0047] Lubrication and protection effect: By setting up a lubrication component, the present invention uses the oil reservoir 28 and O-ring 3 to keep lubricating oil, and continuously lubricates the mating area of ​​the hollow transmission body 21, needle roller 22 and T-nut 23, reducing motion friction, reducing jamming and wear, and improving the service life of the clutch assembly.

[0048] The components, modules, mechanisms, and devices in this invention that are not described in detail are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A flat gate valve with a clutch, characterized in that, Includes a valve body (20), a valve seat (19) and a bracket (4) connected to the valve body (20), a valve plate (16) connected to the valve seat (19), a valve stem (5) connected to the valve plate (16), the valve stem (5) extending into the bracket (4), and a handwheel (2) connected to the bracket (4). A clutch assembly is provided between the handwheel (2) and the valve stem (5), a torque adjustment assembly is provided between the handwheel (2) and the clutch assembly, and a lubrication assembly is provided on the clutch assembly.

2. A flat gate valve with a clutch according to claim 1, characterized in that, The clutch assembly includes a hollow transmission body (21), a needle roller (22), and a T-nut (23). The hollow transmission body (21) is connected to the handwheel (2), and the T-nut (23) is connected to the bracket (4). The bottom wall of the hollow transmission body (21) is provided with a first clutch groove (211), and the top wall of the T-nut (23) is provided with a second clutch groove (231). The needle roller (22) is located between the first clutch groove (211) and the second clutch groove (231). The T-nut (23) is connected to the valve stem (5).

3. A flat gate valve with a clutch according to claim 2, characterized in that, The torque adjustment assembly includes a T-shaped cap (24), an internal hex screw (25), a spring (26), and a steel ball (27). The T-shaped cap (24) is connected to the hollow transmission body (21). The internal hex screw (25) is connected to the T-shaped cap (24). The internal hex screw (25) is connected to the spring (26). The steel ball (27) is connected to the spring (26). The steel ball (27) abuts against the hollow transmission body (21).

4. A flat gate valve with a clutch according to claim 3, characterized in that, The lubrication assembly includes an O-ring (3) and an oil reservoir (28) formed on a T-nut (23), with the O-ring (3) connected to the oil reservoir (28).

5. A flat gate valve with a clutch according to claim 4, characterized in that, A protective cover (1) is connected to the handwheel (2).

6. A flat gate valve with a clutch according to claim 4, characterized in that, A valve cover (12) is connected to the valve body (20).

7. A flat gate valve with a clutch according to claim 4, characterized in that, The valve body (20) is connected to a sealing ring (9), a Y-ring (10) and a packing pad (11). The sealing ring (9), the Y-ring (10) and the packing pad (11) are all located between the valve body (20) and the valve stem (5). The sealing ring (9) is connected to two or more O-rings (8).

8. A flat gate valve with a clutch according to claim 4, characterized in that, An O-ring (18) is provided between the valve body (20) and the valve seat (19), and a sealing ring (17) is provided between the valve seat (19) and the valve plate (16).

9. A flat gate valve with a clutch according to claim 4, characterized in that, The valve body (20) includes an upper shell and a lower shell, which are connected by a middle flange gasket (13), a second nut (14), and a second double-ended stud (15).

10. A flat gate valve with a clutch according to claim 9, characterized in that, The upper shell and the bracket (4) are connected by a nut (6) and a double-ended stud (7).

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