Fluorine-lined diaphragm valve
By introducing springs and buffer components into the fluoropolymer-lined diaphragm valve, the problem of valves not closing tightly or being over-compressed during operation in traditional fluoropolymer-lined diaphragm valves has been solved, resulting in higher sealing performance and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional fluoropolymer-lined diaphragm valves are difficult to judge during operation, which may lead to incomplete closure and leakage, or excessive tightening that may damage the screw and the threads on the valve body.
The design incorporates springs and buffer components. The screw drives the drive rod and reinforcing block to move in conjunction with the diaphragm sealing gasket. By utilizing the elasticity of the spring and the deformation of the buffer components, the sealing performance and stability of the valve are enhanced, the operational impact force is reduced, and the screw and valve body threads are protected.
It effectively reduces the possibility of valves not being fully closed, extends valve service life, improves sealing performance and operational stability, and protects the screw and valve body threads from damage.
Smart Images
Figure CN224079629U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of diaphragm valve technology, and in particular to a fluoropolymer-lined diaphragm valve. Background Technology
[0002] A fluoropolymer-lined diaphragm valve is a special type of shut-off valve that emerged in the 1920s. Its opening and closing element is a diaphragm gasket made of a soft material, separating the valve body cavity from the valve cover cavity and the drive components. A common drive component is a screw drive, with a handwheel fixed to the upper end of the screw for easy manual rotation. Rotating the handwheel raises and lowers the screw, thereby controlling the raising and lowering of the diaphragm gasket and controlling the flow or opening / closing of the fluid passage.
[0003] However, during operation, operators often find it difficult to judge the tightness of the valve closure in traditional fluoropolymer-lined diaphragm valves. This can lead to incomplete closure and leakage, or excessive tightening that can damage the screw and the threads on the valve body. Utility Model Content
[0004] In order to enhance the stability and sealing performance of fluoropolymer-lined diaphragm valves and improve their performance and lifespan, this utility model provides a fluoropolymer-lined diaphragm valve.
[0005] The fluoropolymer-lined diaphragm valve provided by this utility model adopts the following technical solution:
[0006] A fluoropolymer-lined diaphragm valve includes a valve body, a valve cover, and a diaphragm sealing gasket. A valve seat is disposed on the valve body. The valve cover is connected to the valve body via a flange. The diaphragm sealing gasket is disposed between the valve body and the valve cover and is connected to both the valve body and the valve cover. A handwheel is rotatably connected to the valve cover. The valve valve valve also includes a valve stem structure, which includes a screw, a drive rod, and a reinforcing block. The screw is threadedly connected to the handwheel. A housing is disposed between the drive rod and the screw. Both the screw and the drive rod are inserted into the housing. A first moving block, a second moving block, and a spring are disposed within the housing. The first and second moving blocks are arranged side-by-side, and their top surfaces are both inclined. Each of the top surfaces slopes upwards from one end closer to the other. The top surfaces of both the first and second moving blocks abut against the screw, and the bottom surfaces of both the first and second moving blocks abut against the drive rod. Buffers are connected to the sidewalls of both the first and second moving blocks that are far apart from each other. The buffers are connected to the housing. A spring is located between the first and second moving blocks, with one end connected to the screw and the other end connected to the drive rod. A reinforcing block is embedded in the diaphragm gasket. The drive rod passes through the diaphragm gasket and connects to the reinforcing block. When the diaphragm gasket abuts against the valve seat, the spring is in a compressed state.
[0007] By adopting the above technical solution, rotating the handwheel causes the screw to move under the action of the thread. The screw, through a spring, drives the drive rod to move. The drive rod and the reinforcing block work together to move the diaphragm sealing gasket, thereby realizing the opening and closing of the fluoropolymer-lined diaphragm pump. During the movement of the screw, the elastic force of the compressed spring causes the drive rod and the reinforcing block to move closer to the valve seat, thus making the diaphragm sealing gasket fit more tightly against the valve seat and reducing the possibility of the valve not being completely closed. The spring design allows the screw to press the top surfaces of the first and second moving blocks when moving towards the diaphragm sealing gasket. Due to the inclination of the top surfaces, the first and second moving blocks will move away from each other and compress the buffer. At the same time, the spring will also deform to provide a buffering effect. This design can effectively reduce the impact force generated during operation and reduce the possibility of excessive tightening damaging the screw and the threads on the valve body. The deformation of the spring and the buffer block allows the operator to detect changes in resistance, thereby judging whether the diaphragm valve is closed, enhancing the stability and sealing performance of the fluoropolymer-lined diaphragm valve, and improving its performance and service life. In addition, the reinforcing block embedded in the diaphragm gasket can enhance the structural strength of the diaphragm gasket, making the entire fluoropolymer-lined diaphragm valve more stable and durable, and improving the valve's working performance and service life.
[0008] Preferably, the buffer is a rubber pad, and a buffer cavity is formed inside the buffer.
[0009] By adopting the above technical solution, when the screw moves and causes the first and second moving blocks to move, a rubber pad is used as a buffer and a buffer cavity is opened inside. When subjected to force, it deforms and can play a buffering role, which can reduce the possibility of excessive compression and damage to the screw and the threads on the valve body.
[0010] Preferably, the buffer member is connected to a buffer strip on the side wall away from the box body, and the buffer strips on the two buffer members are connected to their respective moving blocks.
[0011] By adopting the above technical solution, the buffer strip can further enhance the buffering effect and deform under force, which can reduce the possibility of excessive compression damaging the screw and the threads on the valve body.
[0012] Preferably, the first movable block has a first half-groove, and the second movable block has a second half-groove. The first movable block and the second movable block abut against each other, and the first half-groove and the second half-groove form a placement space. The spring is disposed in the placement space.
[0013] By adopting the above technical solution, a stable placement space is provided for the spring, reducing the possibility of displacement or shaking during operation, ensuring that the spring can better exert its elastic function, and guaranteeing the stable operation of the valve stem structure.
[0014] Preferably, the screw is connected to a first fixing block, which is disposed in the housing. The side wall of the first fixing block away from the screw is a first arc surface, and its center is located on the side close to the screw. Both the first moving block and the second moving block abut against the first arc surface.
[0015] By adopting the above technical solution, the first fixed block has a limiting function, keeping the screw connected to the housing; the setting of the first arc surface on the first fixed block facilitates the movement of the first moving block and the second moving block in a direction away from each other, thereby improving the overall transmission stability and reliability of the valve stem structure.
[0016] Preferably, the drive rod is connected to a second fixing block, which is disposed inside the box. The side wall of the second fixing block away from the drive rod is configured as a second arc surface, and its center is located on the side close to the drive rod. Both the second moving block and the second moving block abut against the second arc surface.
[0017] By adopting the above technical solution, the second fixed block has a limiting function, keeping the drive rod connected to the box; the setting of the second arc surface on the second fixed block facilitates the movement of the first moving block and the second moving block in a direction away from each other, thereby improving the overall transmission stability and reliability of the valve stem structure.
[0018] Preferably, a protective pad is connected to the side wall of the reinforcing block away from the drive rod, and the protective pad is made of rubber.
[0019] By adopting the above technical solution, the protective pad will deform under force, which can reduce the possibility of excessive compression damaging the screw and the threads on the valve body.
[0020] Preferably, the reinforcing block is covered with a protective sleeve made of rubber, and the protective pad is disposed inside the protective sleeve.
[0021] By adopting the above technical solution, the protective sleeve will also deform under force. It works in conjunction with the protective pad to form three deformable layers along the direction of screw movement, which greatly reduces the possibility of damage to the screw and the threads on the valve body due to excessive compression. At the same time, it extends the service life of the reinforcing block and the diaphragm sealing gasket.
[0022] In summary, this utility model has the following beneficial effects:
[0023] 1. Turning the handwheel moves the screw under the action of the thread. The screw, through a spring, drives the drive rod, which in turn moves the diaphragm sealing gasket, thus opening and closing the fluoropolymer-lined diaphragm pump. During the screw's movement, the spring's compression force moves the drive rod and the reinforcing block closer to the valve seat, ensuring a tighter fit between the diaphragm sealing gasket and the valve seat, reducing the possibility of incomplete valve closure. The spring design allows the screw to press against the top surfaces of the first and second moving blocks as it moves towards the diaphragm sealing gasket. Due to the inclined top surfaces, the first and second moving blocks move away from each other, compressing the buffer. Simultaneously, the spring further deforms, providing a cushioning effect. This design effectively reduces the impact force generated during operation, minimizing the possibility of over-tightening and damaging the screw and the threads on the valve body. The deformation of the spring and buffer block allows the operator to detect changes in resistance, thus determining whether the diaphragm valve is closed. In addition, the reinforcing block embedded in the diaphragm gasket can enhance the structural strength of the diaphragm gasket, making the entire fluoropolymer-lined diaphragm valve more stable and durable, and improving the valve's working performance and service life.
[0024] 2. The protective sleeve and protective gasket work together to form three deformable layers along the direction of screw movement, which greatly reduces the possibility of damage to the screw and the threads on the valve body due to excessive compression. At the same time, it extends the service life of the reinforcing block and the diaphragm sealing gasket. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of a fluoropolymer-lined diaphragm valve.
[0026] Figure 2 This is an internal schematic diagram of a fluoropolymer-lined diaphragm valve.
[0027] Figure 3 yes Figure 2 Enlarged diagram of part A in the middle.
[0028] Explanation of reference numerals in the attached figures:
[0029] 1. Valve body; 11. Valve seat; 12. Inlet channel; 13. Outlet channel; 2. Valve cover; 21. Handwheel; 22. Sleeve; 3. Diaphragm sealing gasket; 4. Valve stem structure; 41. Screw; 411. First fixing block; 42. Drive rod; 421. Second fixing block; 43. Reinforcing block; 431. Protective pad; 432. Protective sleeve; 5. Box body; 6. First moving block; 61. First half-groove; 7. Second moving block; 71. Second half-groove; 8. Spring; 9. Buffer; 91. Buffer chamber; 92. Buffer strip. Detailed Implementation
[0030] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.
[0031] In the description of the embodiments of this application, the words "for example" or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design that is described as "for example" or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Rather, the use of the words "for example" or "for instance" is intended to present the relevant concepts in a specific manner.
[0032] In the description of the embodiments of this application, the term "multiple" means two or more. For example, multiple systems means two or more systems, and multiple screen terminals means two or more screen terminals. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.
[0033] A fluoropolymer-lined diaphragm valve, referenced Figure 1 and Figure 2 The valve includes a valve body 1, a valve cover 2, a diaphragm gasket 3, and a valve stem structure 4. The valve body 1 is equipped with a valve seat 11. The valve cover 2 is connected to the valve body 1 via a flange. The diaphragm gasket 3 is positioned between the valve body 1 and the valve cover 2, and is connected to both, thus isolating the inner cavity of the valve body 1 from the inner cavity of the valve cover 2 and the driving components. A handwheel 21 is rotatably connected to the valve cover 2. One end of the valve stem structure 4 is connected to the handwheel 21, and the other end is connected to the diaphragm gasket 3, used to control the raising and lowering of the diaphragm gasket 3, thereby controlling the flow or opening and closing of the fluid channel, achieving the beneficial effect of precisely controlling the valve's on / off state.
[0034] Reference Figure 2 and Figure 3The valve stem structure 4 includes a screw 41, a drive rod 42, and a reinforcing block 43. A sleeve 22 is fixedly connected to the handwheel 21, and the screw rod extends vertically into the sleeve 22 and is threadedly connected to it. The drive rod 42 is connected to the screw 41 via a housing 5. Both the drive rod 42 and the screw 41 are inserted into the housing 5 and are slidably connected to it. A spring 8 is installed inside the housing 5, with one end fixedly connected to the screw 41 and the other end fixedly connected to the drive rod 42. The reinforcing block 43 is embedded in the diaphragm sealing gasket 3, and the drive rod 42 passes through the diaphragm sealing gasket 3 and is fixedly connected to the reinforcing block 43. When the diaphragm sealing gasket 3 abuts against the valve seat 11, the spring 8 is in a compressed state.
[0035] When the handwheel 21 is turned, the screw 41 moves up and down due to the threaded transmission. The screw 41 drives the drive rod 42 and the reinforcing block 43 to move via the spring 8, which in turn moves the diaphragm sealing gasket 3, thus realizing the opening and closing of the fluoropolymer-lined diaphragm pump. Furthermore, the deformation of the spring 8 allows the operator to detect changes in resistance, thereby determining whether the diaphragm valve is closed, enhancing the stability and sealing performance of the fluoropolymer-lined diaphragm valve, and improving its performance and lifespan.
[0036] Reference Figure 2 The valve seat 11 has an inlet channel 12 and an outlet channel 13 on both sides.
[0037] Reference Figure 3 The drive rod 42 is located below the screw 41, and their axes coincide. A first fixing block 411 is fixedly connected to the bottom end of the screw 41. The side wall of the first fixing block 411 away from the screw 41 is a first arc surface, and its center is located on the side closer to the screw 41. A second fixing block 421 is fixedly connected to the top end of the drive rod 42. The side wall of the second fixing block 421 away from the drive rod 42 is a second arc surface, and its center is located on the side closer to the drive rod 42.
[0038] Both the first fixing block 411 and the second fixing block 421 have a limiting function, which keeps the screw 41 and the drive rod 42 connected to the box body 5, respectively.
[0039] Reference Figure 3 The box 5 also contains a first movable block 6 and a second movable block 7. The first movable block 6 and the second movable block 7 are arranged side-by-side in a horizontal direction, with their top surfaces sloping upwards from one end closer to the other, and their bottom surfaces sloping downwards from one end closer to the other. The top surfaces of both the first movable block 6 and the second movable block 7 abut against a first arc surface. The bottom surfaces of both the first movable block 6 and the second movable block 7 abut against a second arc surface.
[0040] The first arc surface on the first fixed block 411 facilitates the movement of the first moving block 6 and the second moving block 7 in a direction away from each other, thereby improving the overall transmission stability and reliability of the valve stem structure 4. Similarly, the second arc surface also facilitates the movement of the first moving block 6 and the second moving block 7 in a direction away from each other.
[0041] Reference Figure 3 The first movable block 6 has a first half-groove 61, and the second movable block 7 has a second half-groove 71. When the first movable block 6 and the second movable block 7 abut, the first half-groove 61 and the second half-groove 71 form a placement space, and the spring 8 is placed in the placement space.
[0042] The spring 8 is placed stably in the placement space to reduce the possibility of displacement or shaking during operation, ensuring that the spring 8 can better exert its elastic function and guaranteeing the stable operation of the valve stem structure 4.
[0043] Reference Figure 3 Both the first moving block 6 and the second moving block 7 have buffer elements 9 fixedly connected to their respective sidewalls, which are far apart from each other. The buffer elements 9 are rubber pads. A buffer cavity 91 is formed inside the buffer element 9. A buffer strip 92 is fixedly connected to the sidewall of the buffer element 9 away from the box body 5. The length direction of the buffer strip 92 is parallel to the horizontal direction, and several buffer strips 92 are arranged vertically. The buffer strips 92 on the two buffer elements 9 are fixedly connected to their respective moving blocks.
[0044] When the screw 41 moves, causing the first moving block 6 and the second moving block 7 to move, a rubber pad 9 is used as a buffer element with an internal buffer cavity 91. When subjected to force, it deforms, which can play a buffering role and reduce the possibility of excessive compression damaging the screw 41 and the threads on the valve body 1. The buffer strip 92 further enhances the buffering effect.
[0045] Reference Figure 3 A protective pad 431 is fixedly connected to the side wall of the reinforcing block 43 away from the drive rod 42. The reinforcing block 43 is covered by a protective sleeve 432, and the protective pad 431 is located inside the protective sleeve 432. Both the protective pad 431 and the protective sleeve 432 are made of rubber and form three deformable layers along the moving direction of the screw 41, which greatly reduces the possibility of damage to the screw 41 and the threads on the valve body 1 due to excessive compression. At the same time, it extends the service life of the reinforcing block 43 and the diaphragm sealing gasket 3.
[0046] The operating principle of this application is as follows: When the handwheel 21 is turned, the screw 41 rises and falls under the action of the thread. Through the cooperation of the first moving block 6, the second moving block 7 and the spring 8 inside the housing 5, the power is transmitted to the drive rod 42. The drive rod 42 drives the reinforcing block 43 and the diaphragm sealing gasket 3 to rise and fall, thereby controlling the opening and closing of the valve. During the movement of the screw 41 and the drive rod 42, the first fixed block 411 and the second fixed block 421 move closer to each other and squeeze the first moving block 6 and the second moving block 7, causing the first moving block 6 and the second moving block 7 to move away from each other. This causes the buffer strip 92 and / or the buffer element 9 to deform, and the spring 8 will also deform further to play a buffering role. This design can effectively reduce the impact force generated during operation, reduce the possibility of damage to the screw 41 and the threads on the valve body 1 due to excessive tightening, and also extend the service life of the valve stem structure 4. The design of the protective gasket 431 and the protective sleeve 432 protects the diaphragm sealing gasket 3 and the reinforcing block 43, improving the reliability of the valve. Compared to traditional fluoropolymer-lined diaphragm valves, this embodiment can effectively avoid leakage caused by incomplete valve closure or damage to the screw 41 and the threads on the valve body 1 due to excessive tightening, thus offering better practicality and stability.
[0047] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.
Claims
1. A fluoropolymer-lined diaphragm valve, comprising a valve body (1), a valve cover (2), and a diaphragm sealing gasket (3), wherein a valve seat (11) is provided on the valve body (1), the valve cover (2) is connected to the valve body (1) via a flange, the diaphragm sealing gasket (3) is disposed between the valve body (1) and the valve cover (2), and is connected to both the valve body (1) and the valve cover (2), and the valve cover (2) is rotatably connected to a handwheel (21), characterized in that: Also include the valve stem structure (4), the valve stem structure (4) includes screw rod (41), drive rod (42) and reinforcing block (43), the screw rod (41) is threadedly connected with the hand wheel (21), the drive rod (42) is provided with box body (5) between the screw rod (41), the screw rod (41) and the drive rod (42) are inserted inside the box body (5), the box body (5) is equipped with first moving block (6), second moving block (7) and spring (8), the first moving block (6) and the second moving block (7) are arranged side by side, the top surface of the first moving block (6) and the second moving block (7) are inclinedly arranged, and the top surface of each is inclined upward from one end to the other end, the top surface of the first moving block (6) and the second moving block (7) are abutted with the screw rod (41), the bottom surface of the first moving block (6) and the second moving block (7) are abutted with the drive rod (42), the side wall of the first moving block (6) and the second moving block (7) away from each other is connected with buffer (9), the buffer (9) is connected with the box body (5), the spring (8) is arranged between the first moving block (6) and the second moving block (7), and one end of the spring (8) is connected with the screw rod (41), the other end is connected with the drive rod (42), the reinforcing block (43) is embedded in the diaphragm sealing gasket (3), the drive rod (42) passes through the diaphragm sealing gasket (3) and is connected with the reinforcing block (43), when the diaphragm sealing gasket (3) is abutted with the valve seat (11), the spring (8) is in a compressed state.
2. A fluoropolymer lined diaphragm valve according to claim 1, wherein: The buffer (9) is a rubber pad, and a buffer cavity (91) is formed in the buffer (9).
3. A fluoropolymer lined diaphragm valve according to claim 2, wherein: The side wall of the buffer (9) away from the box body (5) is connected with a buffer strip (92), and the buffer strips (92) on the two buffers (9) are connected with the respective moving blocks.
4. The fluoropolymer lined diaphragm valve of claim 1, wherein: A first half groove (61) is formed in the first moving block (6), and a second half groove (71) is formed in the second moving block (7). The first moving block (6) and the second moving block (7) are abutted, the first half groove (61) and the second half groove (71) form a placing space, and the spring (8) is arranged in the placing space.
5. The liner diaphragm valve according to claim 1, wherein: The screw rod (41) is connected with a first fixed block (411), the first fixed block (411) is arranged in the box body (5), the side wall of the first fixed block (411) away from the screw rod (41) is a first arc surface, and the center of the first arc surface is located on the side close to the screw rod (41), and the first moving block (6) and the second moving block (7) are abutted with the first arc surface.
6. A lined diaphragm valve according to claim 1, characterized in that: The driving rod (42) is connected with a second fixed block (421), the second fixed block (421) is arranged in the box body (5), the side wall of the second fixed block (421) away from the driving rod (42) is provided with a second arc surface, and the center of the second arc surface is located on the side close to the driving rod (42), and the second moving block (7) and the second moving block (7) are in abutment with the second arc surface.
7. A lined diaphragm valve according to claim 1, characterized in that: The reinforcing block (43) is connected with a protective pad (431) away from the side wall of the driving rod (42), and the protective pad (431) is made of rubber material.
8. A lined diaphragm valve according to claim 7, characterized in that: The reinforcing block (43) is covered with a protective sleeve (432) made of rubber material, and the protective pad (431) is arranged in the protective sleeve (432).