Convergence plate type normally-closed pneumatic stop valve

Abstract

The utility model provides a confluence plate type normally closed pneumatic stop valve which comprises a valve seat, the valve body is arranged at the top of the valve seat, second hexagon socket cap screws are arranged on three sides of the surface of the valve body, a piston is arranged in the valve body, and a spring is arranged in the middle of the top of the piston. The utility model provides a convergence plate type normally-closed pneumatic stop valve. A valve seat, a sealing gasket, a valve rod, a pressing cap, a sealing copper sleeve, a piston, a spring, a valve body, a first hexagon socket head cap screw, a second hexagon socket head cap screw, a third hexagon socket head cap screw, a circlip for a hole, a first O-shaped ring, a second O-shaped ring, a third O-shaped ring, a fourth O-shaped ring and a fifth O-shaped ring are matched with one another. The valve seat, the inlet end, the outlet end, the connecting end and the mounting end of parts in a common valve applied in the market are integrally designed, so that the valve is convenient to mount, low in machining cost and high in sealing reliability.

Description

Technical Field

[0001] This utility model relates to the field of normally closed pneumatic shut-off valves, and in particular to a manifold type normally closed pneumatic shut-off valve. Background Technology

[0002] In industries such as petrochemicals, natural gas transmission, and power, normally closed pneumatic shut-off valves are commonly used for emergency shut-off and process control, playing a vital role in ensuring stable system operation and safe production.

[0003] Normally closed pneumatic shut-off valves are key control components in industrial pipeline systems. Under normal conditions, the valve disc tightly adheres to the valve seat, blocking the flow of media and ensuring system safety. Once a compressed air signal is received from an external air source, the valve quickly actuates, the valve disc moves upward to open the passage, allowing the media to flow smoothly and achieving precise flow control. It mainly consists of a valve body, valve disc, valve stem, and pneumatic actuator. The valve body is cast from high-quality metal materials, possessing excellent pressure resistance and corrosion resistance. The valve disc and valve seat are precision ground, providing excellent sealing performance and effectively preventing media leakage. The pneumatic actuator is highly responsive, able to respond quickly to different pressure signals, and features fast opening and closing speeds, simple operation, and remote control capabilities, making it suitable for highly automated industrial scenarios.

[0004] Currently, the market for normally closed pneumatic shut-off valves offers two main installation methods: straight-through and angle-mounted. Both types of valves have relatively complex structures and require more complicated system installation and connection.

[0005] Therefore, it is necessary to provide a manifold type normally closed pneumatic shut-off valve to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model provides a manifold type normally closed pneumatic stop valve, which solves the problem that the existing normally closed pneumatic stop valves on the market are divided into straight-through structure and angle installation structure, and their product structure is relatively complex and the system installation and connection is relatively cumbersome.

[0007] To solve the above-mentioned technical problems, this utility model provides a manifold type normally closed pneumatic shut-off valve, including: a valve seat;

[0008] A valve body is disposed on the top of the valve seat. A second internal hexagonal head screw is disposed on three sides of the surface of the valve body. A piston is disposed inside the valve body. A spring is disposed in the middle of the top of the piston. A first internal hexagonal head screw is disposed on the top of the piston. A valve stem is disposed at the bottom of the first internal hexagonal head screw. A second O-ring is disposed on the outer surface of the piston.

[0009] A sealing copper sleeve is provided at the bottom of the valve body. A third O-ring and a first O-ring are respectively provided on the outer and inner surfaces of the sealing copper sleeve. The sealing copper sleeve is sleeved on the outer surface of the valve stem.

[0010] A sealing gasket is disposed at the bottom center of the valve stem. The hole is fitted with an elastic retaining ring on one side of the outer surface of the valve stem. A pressure cap is provided at the bottom of the outer surface of the valve stem. The pressure cap wraps the sealing gasket and the hole with the elastic retaining ring on the outer surface of the valve stem.

[0011] Preferably, a fifth O-ring is provided at the bottom of the valve seat, and a fourth O-ring is provided in the middle of the bottom of the valve seat, with the fourth O-ring positioned in the middle of the fifth O-ring.

[0012] Preferably, the valve seat is made of 2A12 aluminum alloy, and a medium outlet and a medium inlet are provided in the middle of the bottom and one side of the bottom of the valve seat.

[0013] Preferably, the valve seat has through holes at its four corners, and each of the four through holes is fitted with a third hexagon socket head cap screw. The valve seat is then mounted on the manifold using the four third hexagon socket head cap screws.

[0014] Preferably, the sealing gasket is made of fluororubber and is fixedly installed between the valve stem and the pressure cap through the hole using an elastic retaining ring.

[0015] Preferably, the valve seat and the valve body have slots on three sides of their outer surfaces, and the valve seat and the valve body have limiting devices on their outer surfaces. The limiting devices include a connecting plate, a moving groove, a fixing block, a sliding rod, an elastic element, and a clamping block.

[0016] Preferably, the connecting plate is attached to the outer surface of the valve seat and the valve body, the moving groove is opened in the middle of the surface of the connecting plate, the slide rod is fixedly installed inside the moving groove, the fixing block is fixedly installed in the middle of the moving groove, the two elastic elements are respectively sleeved on both sides of the outer surface of the slide rod, and the two clamping blocks are respectively slidably installed on both sides of the outer surface of the slide rod.

[0017] Compared with related technologies, the manifold type normally closed pneumatic shut-off valve provided by this utility model has the following advantages:

[0018] This utility model provides a manifold type normally closed pneumatic stop valve, which integrates the valve seat, sealing gasket, valve stem, pressure cap, sealing copper sleeve, piston, spring, valve body, first internal hexagonal head screw, second internal hexagonal head screw, third internal hexagonal head screw, hole elastic retaining ring, first O-ring, second O-ring, third O-ring, fourth O-ring and fifth O-ring in a coordinated manner. It integrates the valve seat, inlet end, outlet end, connection end and installation end of the components of ordinary valves used in the market into one unit, which is convenient for installation, has low processing cost and high sealing reliability. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a first embodiment of a manifold type normally closed pneumatic shut-off valve provided by this utility model;

[0020] Figure 2 A top sectional view of a manifold type normally closed pneumatic shut-off valve provided by this utility model;

[0021] Figure 3 for Figure 1 The diagram shows a front sectional view of the valve seat.

[0022] Figure 4 for Figure 1 The diagram shows a top sectional view of the valve seat.

[0023] Figure 5 for Figure 1 The diagram shows the structure of the sealing gasket.

[0024] Figure 6 for Figure 1 The diagram shows the valve stem structure.

[0025] Figure 7 for Figure 1 The diagram shows the structure of the pressure cap.

[0026] Figure 8 for Figure 1 The diagram shows the structure of the sealing copper sleeve.

[0027] Figure 9 for Figure 1 The diagram shows the piston structure.

[0028] Figure 10 for Figure 1 The diagram shows the spring structure.

[0029] Figure 11 for Figure 1 The diagram shows a front sectional view of the valve body.

[0030] Figure 12 for Figure 1 The diagram shows a top sectional view of the valve body.

[0031] Figure 13 A schematic diagram of the structure of a second embodiment of a manifold type normally closed pneumatic shut-off valve provided by this utility model;

[0032] Figure 14 for Figure 13 The enlarged schematic diagram at point A is shown below;

[0033] Figure 15 for Figure 14 The diagram shows the structure of the limiting device.

[0034] The following are the labeling elements in the diagram: 1. Valve seat; 2. Sealing gasket; 3. Valve stem; 4. Pressure cap; 5. Sealing copper sleeve; 6. Piston; 7. Spring; 8. Valve body; 9. First socket head cap screw; 10. Second socket head cap screw; 11. Third socket head cap screw; 12. Hole retaining ring; 13. First O-ring; 14. Second O-ring; 15. Third O-ring; 16. Fourth O-ring; 17. Fifth O-ring; 18. Slot; 19. Limiting device; 191. Connecting plate; 192. Moving slot; 193. Fixing block; 194. Slide rod; 195. Elastic element; 196. Clamping block. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] First Embodiment

[0037] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of a manifold type normally closed pneumatic shut-off valve provided by this utility model; Figure 2 A top sectional view of a manifold type normally closed pneumatic shut-off valve provided by this utility model; Figure 3 for Figure 1 The diagram shows a front sectional view of the valve seat. Figure 4 for Figure 1 The diagram shows a top sectional view of the valve seat. Figure 5 for Figure 1 The diagram shows the structure of the sealing gasket. Figure 6 for Figure 1 The diagram shows the valve stem structure. Figure 7 for Figure 1 The diagram shows the structure of the pressure cap. Figure 8 for Figure 1 The diagram shows the structure of the sealing copper sleeve. Figure 9 for Figure 1 The diagram shows the piston structure. Figure 10 for Figure 1 The diagram shows the spring structure. Figure 11 for Figure 1 The diagram shows a front sectional view of the valve body. Figure 12 for Figure 1 The diagram shows a top sectional view of the valve body. A manifold type normally closed pneumatic shut-off valve includes: a valve seat 1;

[0038] The valve body 8 is disposed on the top of the valve seat 1. The valve body 8 has a second internal hexagonal head screw 10 on three sides of its surface. The valve body 8 has a piston 6 inside its interior. The piston 6 has a spring 7 in the middle of its top. The piston 6 has a first internal hexagonal head screw 9 on its top. The first internal hexagonal head screw 9 has a valve stem 3 at its bottom. The piston 6 has a second O-ring 14 on its outer surface.

[0039] A sealing copper sleeve 5 is disposed at the bottom inside the valve body 8. A third O-ring 15 and a first O-ring 13 are respectively disposed on the outer and inner surfaces of the sealing copper sleeve 5. The sealing copper sleeve 5 is sleeved on the outer surface of the valve stem 3.

[0040] A sealing gasket 2 is disposed at the bottom center of the valve stem 3. An elastic retaining ring is fitted around the hole on one side of the outer surface of the valve stem 3. A pressure cap 4 is provided at the bottom of the outer surface of the valve stem 3. The pressure cap 4 wraps the sealing gasket 2 and the elastic retaining ring 3 around the outer surface of the valve stem 3.

[0041] A fifth O-ring 17 is provided at the bottom of the valve seat 1, and a fourth O-ring 16 is provided in the middle of the bottom of the valve seat 1, with the fourth O-ring 16 located in the middle of the fifth O-ring 17.

[0042] The valve seat 1 is made of 2A12 aluminum alloy, and a medium outlet and a medium inlet are provided in the middle of the bottom and one side of the bottom of the valve seat 1.

[0043] The valve seat 1 has through holes at its four corners, and each of the four through holes is fitted with a third hexagon socket head cap screw 11. The valve seat 1 is mounted on the manifold by the four third hexagon socket head cap screws 11.

[0044] The sealing gasket 2 is made of fluororubber and is fixedly installed between the valve stem 3 and the pressure cap 4 through the hole using an elastic retaining ring 12.

[0045] Valve seat 1 is made of 2A12 aluminum alloy, which is easier to process than steel parts, has good cutting performance, and is strong enough for this product. It is also lighter than steel parts. After processing, it undergoes surface treatment with natural color oxidation.

[0046] The lower part of the valve seat 1 has two O-ring sealing grooves for installing the fourth O-ring 16 and the fifth O-ring 17. The fourth O-ring 16 and the fifth O-ring 17 isolate the inlet diameter of the sealing medium from the outlet diameter of the medium.

[0047] The valve seat 1 has through holes at its four corners, and is installed in the medium pipeline or on the manifold using four third internal hexagonal head screws 11.

[0048] The valve body 8 is mounted on the top of the valve seat 1 by three second internal hexagon head screws 10.

[0049] The sealing gasket 2 is made of fluororubber, which has better corrosion resistance than ordinary rubber and is suitable for temperatures between -20℃ and +200℃.

[0050] Used to fit the core seal in valve seat 1, it is installed between valve stem 3 and pressure cap 4 and fixed with a hole by elastic retaining ring 12. The purpose is to seal and block the medium (air, nitrogen or other non-corrosive media) from flowing from the inlet to the outlet. The pushing of valve stem 3 causes the sealing gasket to contact the core seal of valve seat 1, and the medium is directly sealed and blocked by its injection molded sheet surface.

[0051] The valve stem 3 is made of 6061-T5 aluminum alloy, which is easier to process than steel parts, has good cutting performance, and is strong enough for this product. It is also lighter than steel parts. After processing, it undergoes a natural color oxidation treatment.

[0052] The bottom of valve stem 3 is used to install sealing gasket 2. The first internal hexagonal head screw 9 is used to cooperate with the pressure cap 4 and screw it to the position shown in the figure. After that, the three parts are fixed together by the elastic retaining ring 12 with the hole. The pre-threaded hole of the first internal hexagonal head screw 9 at the top is for the purpose of connecting piston 6 later.

[0053] The pressure cap 4 is made of 6061-T5 aluminum alloy, which is easier to process than steel parts, has good cutting performance, and is strong enough for this product. It is also lighter than steel parts. After processing, it undergoes a natural color oxidation treatment.

[0054] Used to screw and install the sealing gasket 2 onto the valve stem 3.

[0055] The sealing copper sleeve 5 is made of H62 brass. Since the valve stem 3 and this part are relative moving parts, this material can improve the wear resistance and ensure the service life of the parts during use. There are two O-ring 15 sealing grooves on the outer circle for installing the third O-ring 15, which is used to seal the leakage of driving air in the cylinder of the valve body 8 and the medium in the lower valve seat 1.

[0056] The sealing copper sleeve 5 has a central hole at the top, which is intended to allow the air in the sealing cavity between the two O-rings to communicate with the atmosphere, preventing pressure buildup that could affect the up-and-down reciprocating motion of the valve stem 3. The inner hole has two O-ring sealing grooves at the top and bottom for installing the first O-ring 13, which is used to isolate and block the communication between the driving air in the cylinder of the valve body 8 and the medium inside the valve body.

[0057] Piston 6 is made of white POM material, which is easier to process than steel, has good cutting performance, and is strong enough for this product. A second O-ring 14 is provided on the upper part of piston 6 to seal the driving air leakage in the cylinder of valve body 8. An O-ring groove is provided inside the piston to seal the driving air leakage in the cylinder of valve body 8.

[0058] The piston 6 is fixedly connected to the valve stem 3 by an internal hexagon head screw 9.

[0059] Spring 7 is made of 60Si2MnV material, which is a common carbon steel for springs. It has low processing cost and is plated with colored zinc after processing. Its performance is reliable and it is used in this product. It is installed in the valve body 8 and fits with the upper hole of piston 6.

[0060] The valve body 8 is made of 2A12 aluminum alloy, which is easier to process than steel, has good cutting performance, suitable strength for this product, and is lighter than steel. After processing, it undergoes a natural color oxidation surface treatment. After the spring 7 is inserted into the valve body 8, it is coaxially aligned with the piston 6 and the sealing copper sleeve 5 and installed with an internal hexagonal head screw 10. The top of the valve body 8 is provided with an exhaust hole. When the piston 6 moves upward, it compresses the spring 7 and simultaneously discharges the gas from the piston sealing cavity at the top of the valve body 8 through the exhaust hole. The side of the valve body 8 is provided with an exhaust hole. When the valve stem 3 moves up and down, the gas between the two O-rings in the inner hole of the sealing copper sleeve 5 can be discharged.

[0061] Nominal diameter: 4mm; Nominal pressure: 0.45MPa; Applicable media: air, nitrogen, corrosive media; Operating temperature: -20℃~70℃; Valve body material: 2A12; Drive air pressure: 0.4±0.1MPa; Maximum stroke: 2.5mm.

[0062] The working principle of the manifold type normally closed pneumatic shut-off valve provided by this utility model is as follows:

[0063] When working, when 0.45MPa compressed air is first introduced into the bottom inlet of the valve, the compression force of the spring 7 installed at the top of the cylinder and the spring 7 is in a compressed state reaches the required sealing pressure of the core seal at the valve seat 1. However, this sealing pressure value is less than the allowable sealing pressure of the valve seat 1. At this time, the valve reaches the closed and sealed state, and the inlet and outlet are disconnected.

[0064] When the pressure of the air source (driving air) connected to the side of the valve body 8 is 0.4±0.1MPa, the piston 6 is subjected to an upward thrust. This force is greater than the downward resultant force of the spring 7, valve stem 3 and O-ring, causing the piston 6 and valve stem 3 to move upward as a whole, opening the valve and connecting the outlet and inlet medium.

[0065] Compared with related technologies, the manifold type normally closed pneumatic shut-off valve provided by this utility model has the following advantages:

[0066] This utility model provides a manifold type normally closed pneumatic shut-off valve, which integrates the valve seat 1, sealing gasket 2, valve stem 3, pressure cap 4, sealing copper sleeve 5, piston 6, spring 7, valve body 8, first internal hexagonal head screw 9, second internal hexagonal head screw 10, third internal hexagonal head screw 11, hole elastic retaining ring 12, first O-ring 13, second O-ring 14, third O-ring 15, fourth O-ring 16 and fifth O-ring 17 into one unit through mutual cooperation. It integrates the valve seat, inlet end, outlet end, connection end and installation end of the components of ordinary valves used in the market into one unit, which is convenient for installation, has low processing cost and high sealing reliability.

[0067] Second Embodiment

[0068] Please refer to the following: Figure 13 , Figure 14 and Figure 15 Based on the manifold-type normally closed pneumatic shut-off valve provided in the first embodiment of this application, the second embodiment of this application proposes another manifold-type normally closed pneumatic shut-off valve. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0069] Specifically, the difference in the manifold type normally closed pneumatic shut-off valve provided in the second embodiment of this application is that, in a manifold type normally closed pneumatic shut-off valve, the valve seat 1 and the valve body 8 are provided with slots 18 on three sides of their outer surfaces, and the valve seat 1 and the valve body 8 are provided with limiting devices 19, the limiting devices 19 including connecting plate 191, moving groove 192, fixing block 193, sliding rod 194, elastic element 195 and clamping block 196.

[0070] The connecting plate 191 is attached to the outer surface of the valve seat 1 and the valve body 8. The moving groove 192 is opened in the middle of the surface of the connecting plate 191. The slide rod 194 is fixedly installed inside the moving groove 192. The fixing block 193 is fixedly installed in the middle of the moving groove 192. The two elastic elements 195 are respectively sleeved on both sides of the outer surface of the slide rod 194. The two clamping blocks 196 are respectively slidably installed on both sides of the outer surface of the slide rod 194.

[0071] The working principle of the manifold type normally closed pneumatic shut-off valve provided by this utility model is as follows:

[0072] During operation, the two clamping blocks 196 are first pulled to move away from each other. The clamping blocks 196 slide along the slide rod 194 and pull the elastic element 195, inserting the two clamping blocks 196 into the slots 18 on the surface of the valve seat 1 and the valve body 8 respectively. At the same time, the connecting plate 191 is installed between the valve seat 1 and the valve body 8 by bolts.

[0073] The restoring force of the two elastic elements 195 pulls the two clamping blocks 196 closer to each other, thus binding the valve seat 1 and the valve body 8 together.

[0074] Compared with related technologies, the manifold type normally closed pneumatic shut-off valve provided by this utility model has the following advantages:

[0075] This utility model provides a manifold type normally closed pneumatic shut-off valve. The two elastic elements 195 pull the two clamping blocks 196 closer to each other, so that the two clamping blocks 196 press the valve seat 1 and valve body 8 together when they are combined. This device has a simple structure and strong practicality. The installation of the limiting device 19 improves the connection and sealing effect between the valve seat 1 and valve body 8, and improves the performance of the shut-off valve.

[0076] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A manifold type normally closed pneumatic shut-off valve, characterized in that, include: Valve seat; A valve body is disposed on the top of the valve seat. A second internal hexagonal head screw is disposed on three sides of the surface of the valve body. A piston is disposed inside the valve body. A spring is disposed in the middle of the top of the piston. A first internal hexagonal head screw is disposed on the top of the piston. A valve stem is disposed at the bottom of the first internal hexagonal head screw. A second O-ring is disposed on the outer surface of the piston. A sealing copper sleeve is provided at the bottom of the valve body. A third O-ring and a first O-ring are respectively provided on the outer and inner surfaces of the sealing copper sleeve. The sealing copper sleeve is sleeved on the outer surface of the valve stem. A sealing gasket is disposed at the bottom center of the valve stem. The hole is fitted with an elastic retaining ring on one side of the outer surface of the valve stem. A pressure cap is provided at the bottom of the outer surface of the valve stem. The pressure cap wraps the sealing gasket and the hole with the elastic retaining ring on the outer surface of the valve stem.

2. The manifold type normally closed pneumatic shut-off valve according to claim 1, characterized in that, The bottom of the valve seat is provided with a fifth O-ring, and the middle of the bottom of the valve seat is provided with a fourth O-ring, which is located in the middle of the fifth O-ring.

3. The manifold type normally closed pneumatic shut-off valve according to claim 1, characterized in that, The valve seat is made of 2A12 aluminum alloy, and a medium outlet and a medium inlet are provided in the middle of the bottom and one side of the bottom of the valve seat.

4. A manifold type normally closed pneumatic shut-off valve according to claim 1, characterized in that, The valve seat has through holes at its four corners, and each of the four through holes is fitted with a third hexagon socket head cap screw. The valve seat is mounted on the manifold using the four third hexagon socket head cap screws.

5. A manifold type normally closed pneumatic shut-off valve according to claim 1, characterized in that, The sealing gasket is made of fluororubber and is fixedly installed between the valve stem and the pressure cap through the hole using an elastic retaining ring.

6. A manifold type normally closed pneumatic shut-off valve according to claim 1, characterized in that, The valve seat and the valve body have slots on three sides of their outer surfaces. The valve seat and the valve body are provided with a limiting device on their outer surfaces. The limiting device includes a connecting plate, a moving groove, a fixing block, a sliding rod, an elastic element, and a clamping block.

7. A manifold type normally closed pneumatic shut-off valve according to claim 6, characterized in that, The connecting plate is attached to the outer surface of the valve seat and the valve body. The moving groove is opened in the middle of the surface of the connecting plate. The slide rod is fixedly installed inside the moving groove. The fixing block is fixedly installed in the middle of the moving groove. The two elastic elements are respectively sleeved on both sides of the outer surface of the slide rod. The two clamping blocks are respectively slidably installed on both sides of the outer surface of the slide rod.

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