Pneumatic diaphragm valve
By using structures such as limit rings, limit plug rods, and positioning clamps, the problems of diaphragm wear and poor sealing are solved, achieving stable connection and efficient sealing of the diaphragm valve.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 米拓半导体(上海)股份有限公司
- Filing Date
- 2025-07-11
- Publication Date
- 2026-06-02
AI Technical Summary
The diaphragm of existing pneumatic diaphragm valves is prone to wear and cracking, and the bolt installation method results in poor sealing performance, affecting the use of the device.
The system employs a structure including a limiting ring, a limiting plug rod, and a positioning clamp to achieve a stable connection between the diaphragm body and the valve seat through snapping and compression, thereby improving the sealing effect.
It enhances the connection stability and sealing performance between the diaphragm and the valve seat, prevents diaphragm slippage, and improves the service life and sealing effect of the device.
Smart Images
Figure CN224315535U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pneumatic diaphragm valve technology, and in particular to a pneumatic diaphragm valve. Background Technology
[0002] Valves are control components in fluid transport systems, with functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, flow diversion, or overflow pressure relief. Valves used in fluid control systems range from the simplest shut-off valves to various valves used in extremely complex automatic control systems. Their types and specifications are quite numerous. Valves can be used to control the flow of various types of fluids, such as air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media.
[0003] Since the opening and closing of the pneumatic diaphragm valve is achieved by the internal valve disc pulling and squeezing the diaphragm, the diaphragm is prone to wear and cracking under long-term operation, requiring regular replacement. Moreover, most existing diaphragms are installed with bolts, which can affect the sealing effect at the connection after multiple replacements, affecting the use of the device. Therefore, a pneumatic diaphragm valve is needed to solve the above problems. Utility Model Content
[0004] The main objective of this invention is to provide a pneumatic diaphragm valve that can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A pneumatic diaphragm valve includes a valve body, a valve seat is provided on the top of the valve body, and a mounting base and a pneumatic drive component are provided on the top of the valve seat. A valve stem is provided at the bottom of the pneumatic drive component, and a diaphragm assembly is provided at the bottom of the valve stem.
[0007] The diaphragm assembly includes a diaphragm body, a mounting ring is provided at the top of the diaphragm body, a limit ring is provided at the bottom of the mounting ring, and a groove and a insertion slot are provided at the top of the mounting ring.
[0008] The diaphragm assembly also includes a positioning clamp, one side of which is provided with a mounting ear plate and a positioning bolt is provided in the middle of the mounting ear plate. The side of the positioning clamp is provided with a slot and a limit plate is provided at the bottom of the slot.
[0009] Preferably, the top of the mounting base is provided with a snap-fit groove, and a snap-fit ring is snapped into the inside of the snap-fit groove. The top of the snap-fit ring is fixedly connected to the mounting ring, and a diaphragm body is fixedly connected to one inner wall of the mounting ring. The diaphragm body is located between the valve body and the valve stem.
[0010] Preferably, the top of the mounting ring has a groove, and the groove is located on the top side of the mounting ring away from the diaphragm body. A limiting ring is inserted into the inside of the groove, and the top of the limiting ring is fixedly connected to the bottom of the mounting seat. The mounting seat is C-shaped and snapped onto the outside of the mounting ring, and the bottom of the mounting seat is in contact with the top of the valve seat.
[0011] Preferably, a limiting plug rod is fixedly connected to the top inner wall of the mounting base, and there are four limiting plug rods, which are evenly distributed on the top inner wall of the mounting base. The end of the limiting plug rod away from the mounting base passes through the mounting ring, and the top of the mounting ring is provided with a plug groove, and the limiting plug rod is inserted into the plug groove.
[0012] Preferably, a limiting groove is formed on the bottom outer wall of the valve seat, and a limiting plate is engaged inside the limiting groove. The limiting plate is fixedly connected to a positioning clamp, and there are two positioning clamps, which are symmetrically distributed on both sides of the valve seat. The top inner wall of the positioning clamp is in contact with the top of the mounting base.
[0013] Preferably, the positioning clamp is fixedly connected to the side with mounting ear plates, and there are two mounting ear plates, which are symmetrically distributed at both ends of the positioning clamp. The middle of the mounting ear plates is connected to a positioning bolt by a thread, and the positioning bolt connects the two mounting ear plates on opposite sides of the two positioning clamps. The side of the positioning clamp is provided with a slot, and the slot is sleeved on the outside of the mounting ring and the mounting base.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. By engaging the mounting ring at the bottom of the mounting ring with the inside of the engagement groove, and engaging the limiting ring at the bottom of the mounting base with the inside of the groove, the mounting ring and the diaphragm body are connected in a limiting manner, thereby improving the sealing effect when the diaphragm body is connected to the valve seat. Furthermore, by engaging the limiting insertion rod inside the insertion groove, the stability of the mounting ring and the diaphragm body is further improved, preventing the diaphragm body and the mounting ring from sliding during use.
[0016] 2. Two positioning clamps are respectively fitted onto both sides of the mounting ring, mounting seat, and valve seat to achieve positioning connection between the mounting seat and the mounting ring. Furthermore, the limiting plate is clamped to the bottom of the valve seat to further compress the mounting seat and the mounting ring, thereby improving the sealing performance of the connection. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;
[0018] Figure 2 This is a cross-sectional structural schematic diagram of the device of this utility model;
[0019] Figure 3 This is a first-view structural schematic diagram of the diaphragm assembly of this utility model;
[0020] Figure 4 This is a structural schematic diagram of the diaphragm assembly of this utility model from a second perspective.
[0021] In the diagram: 1. Valve body; 2. Valve seat; 3. Pneumatic drive component; 4. Mounting base; 5. Valve stem; 6. Diaphragm assembly; 7. Diaphragm body; 8. Mounting ring; 9. Groove; 10. Snap-fit ring; 11. Snap-fit groove; 12. Limiting ring; 13. Limiting insertion rod; 14. Insertion groove; 15. Positioning clamp; 16. Mounting ear plate; 17. Snap-fit groove; 18. Positioning bolt; 19. Limiting plate; 20. Limiting groove. Detailed Implementation
[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0023] Please see Figure 1 , Figure 2 , Figure 3 As shown, a pneumatic diaphragm valve includes a valve body 1, a valve seat 2 is provided on the top of the valve body 1, and a mounting base 4 and a pneumatic drive component 3 are provided on the top of the valve seat 2, a valve stem 5 is provided on the bottom of the pneumatic drive component 3, and a diaphragm assembly 6 is provided on the bottom of the valve stem 5.
[0024] The diaphragm assembly 6 includes a diaphragm body 7. A mounting ring 8 is provided at the top of the diaphragm body 7, and a limiting ring 12 is provided at the bottom of the mounting ring 8. A groove 9 and an insertion slot 14 are provided at the top of the mounting ring 8. A snap-fit slot 11 is provided at the top of the mounting seat 4, and a snap-fit ring 10 is snapped into the inside of the snap-fit slot 11. The top of the snap-fit ring 10 is fixedly connected to the mounting ring 8. The diaphragm body 7 is fixedly connected to one inner wall of the mounting ring 8. The diaphragm body 7 is located between the valve body 1 and the valve stem 5. A groove 9 is provided at the top of the mounting ring 8, located on the top side of the mounting ring 8 away from the diaphragm body 7. A limiting ring 12 is inserted into the groove 9, and the top of the limiting ring 12 is fixedly connected to the bottom of the mounting seat 4. The mounting seat 4 is C-shaped and snapped onto the outside of the mounting ring 8, with the bottom of the mounting seat 4 contacting the top of the valve seat 2. Four limiting plug-in rods 13 are fixedly connected to the top inner wall of the mounting base 4, and are evenly distributed on the top inner wall of the mounting base 4. The end of the limiting plug-in rod 13 away from the mounting base 4 passes through the mounting ring 8, and the top of the mounting ring 8 is provided with a plug-in groove 14. The limiting plug-in rod 13 is inserted into the plug-in groove 14 and is locked into the locking groove 11 by the locking ring 10 set at the bottom of the mounting ring 8. The limiting ring 12 at the bottom of the mounting base 4 is locked into the groove 9, thereby realizing the limiting connection between the mounting ring 8 and the diaphragm body 7, improving the sealing effect when the diaphragm body 7 is connected to the valve seat 2. Furthermore, the use stability of the mounting ring 8 and the diaphragm body 7 is further improved by the limiting plug-in rod 13 being inserted into the plug-in groove 14, preventing the diaphragm body 7 and the mounting ring 8 from sliding during use.
[0025] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the diaphragm assembly 6 also includes a positioning clamp 15. A mounting ear plate 16 is provided on one side of the positioning clamp 15, and a positioning bolt 18 is provided in the middle of the mounting ear plate 16. A groove 17 is provided on the side of the positioning clamp 15, and a limiting plate 19 is provided at the bottom of the groove 17. A limiting groove 20 is formed on the bottom outer wall of the valve seat 2, and the limiting plate 19 is engaged inside the limiting groove 20. The limiting plate 19 is fixedly connected to the positioning clamp 15. There are two positioning clamps 15, symmetrically distributed on both sides of the valve seat 2. The top inner wall of the positioning clamp 15 contacts the top of the mounting base 4. The mounting ear plate 16 is fixedly connected to the side of the positioning clamp 15. There are two 6, symmetrically distributed at both ends of the positioning clamp 15. The middle of the mounting ear plate 16 is connected by a positioning bolt 18 through a thread, and the positioning bolt 18 connects the two mounting ear plates 16 on opposite sides of the two positioning clamps 15. The side of the positioning clamp 15 has a slot 17, and the slot 17 is sleeved on the outside of the mounting ring 8 and the mounting seat 4. By setting the two positioning clamps 15 respectively on both sides of the mounting ring 8, the mounting seat 4 and the valve seat 2, the positioning connection of the mounting seat 4 and the mounting ring 8 is realized. Furthermore, the limiting plate 19 is set to clamp the bottom of the valve seat 2, further compressing the mounting seat 4 and the mounting ring 8 and improving the sealing of the connection.
[0026] It should be noted that this utility model is a pneumatic diaphragm valve. In use, the diaphragm body 7 and the mounting ring 8 are installed on top of the valve seat 2, so that the snap-fit ring 10 at the bottom of the mounting ring 8 snaps into the snap-fit groove 11 at the top of the valve seat 2. Then, the mounting base 4 drives the pneumatic drive component 3 to snap into the outside of the mounting ring 8, so that the limiting ring 12 on the inner wall of the top of the mounting base 4 snaps into the groove 9 at the top of the mounting ring 8, further improving the limiting and sealing effect of the mounting ring 8. Simultaneously, the limiting insertion rod 13 on the inner wall of the top of the mounting base 4 is inserted into the insertion groove 14 in the middle of the mounting ring 8, thereby achieving the control of the mounting ring 8. The positioning clamp 15 is then clamped onto the outside of the valve seat 2, the mounting ring 8, and the mounting base 4, so that the limiting plate 19 at the bottom of the positioning clamp 15 is clamped into the limiting groove 20 at the bottom of the valve seat 2. At the same time, the top inner wall of the positioning clamp 15 contacts the top of the mounting base 4, so that the mounting ear plates 16 on one side of the two positioning clamps 15 contact each other. The positioning bolt 18 passes through the two mounting ear plates 16 on the opposite side of the positioning clamp 15, thereby realizing the positioning connection of the positioning clamp 15. The positioning clamp 15 is sleeved on the outside of the mounting ring 8, which improves the installation stability and the sealing effect at the connection.
[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A pneumatic diaphragm valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a valve seat (2) at the top, and the valve seat (2) is provided with a mounting base (4) and a pneumatic drive component (3) at the top. The pneumatic drive component (3) is provided with a valve stem (5) at the bottom, and the valve stem (5) is provided with a diaphragm assembly (6) at the bottom. The diaphragm assembly (6) includes a diaphragm body (7), the top of which is provided with an installation ring (8), and the bottom of which is provided with a limit ring (12). The top of the installation ring (8) is provided with a groove (9) and a insertion slot (14). The diaphragm assembly (6) also includes a positioning clamp (15), on one side of which is provided an mounting ear plate (16), and in the middle of the mounting ear plate (16) is a positioning bolt (18). The side of the positioning clamp (15) is provided with a slot (17), and at the bottom of the slot (17) is a limiting plate (19).
2. A pneumatic diaphragm valve according to claim 1, characterized in that: The mounting base (4) has a snap-fit groove (11) on its top, and a snap-fit ring (10) is snapped into the inside of the snap-fit groove (11). The top of the snap-fit ring (10) is fixedly connected to the mounting ring (8), and a diaphragm body (7) is fixedly connected to one side of the inner wall of the mounting ring (8). The diaphragm body (7) is located between the valve body (1) and the valve stem (5).
3. A pneumatic diaphragm valve according to claim 2, characterized in that: The top of the mounting ring (8) is provided with a groove (9), and the groove (9) is located on the top side of the mounting ring (8) away from the diaphragm body (7). A limiting ring (12) is inserted into the groove (9), and the top of the limiting ring (12) is fixedly connected to the bottom of the mounting seat (4). The mounting seat (4) is C-shaped and snapped onto the outside of the mounting ring (8), and the bottom of the mounting seat (4) is in contact with the top of the valve seat (2).
4. A pneumatic diaphragm valve according to claim 3, characterized in that: The mounting base (4) has four limiting plug rods (13) fixedly connected to its top inner wall. The limiting plug rods (13) are evenly distributed on the top inner wall of the mounting base (4). The end of the limiting plug rod (13) away from the mounting base (4) passes through the mounting ring (8). The top of the mounting ring (8) is provided with a plug groove (14). The limiting plug rod (13) is inserted into the plug groove (14).
5. A pneumatic diaphragm valve according to claim 1, characterized in that: A limiting groove (20) is provided on the bottom outer wall of the valve seat (2), and a limiting plate (19) is engaged inside the limiting groove (20). The limiting plate (19) is fixedly connected to the positioning clamp (15), and there are two positioning clamps (15), which are symmetrically distributed on both sides of the valve seat (2). The top inner wall of the positioning clamp (15) is in contact with the top of the mounting base (4).
6. A pneumatic diaphragm valve according to claim 5, characterized in that: The positioning clamp (15) is fixedly connected to the side of the mounting ear plate (16), and there are two mounting ear plates (16), which are symmetrically distributed at both ends of the positioning clamp (15). The middle of the mounting ear plate (16) is connected to the positioning bolt (18) by thread, and the positioning bolt (18) connects the two mounting ear plates (16) on opposite sides of the two positioning clamps (15). The side of the positioning clamp (15) is provided with a slot (17), and the slot (17) is sleeved on the outside of the mounting ring (8) and the mounting base (4).