Break-proof diaphragm and break-proof diaphragm for mounting in the diaphragm valve

Abstract

The explosion-proof diaphragm of this invention is assembled into a control valve. The explosion-proof diaphragm includes a recessed portion and an annular portion. The recessed portion has an inner surface and an outer surface. Reinforcing steps are formed on opposite sides of the inner surface, such that a central groove is formed between the two reinforcing steps. A positioning post is provided on the inner surface in the central groove. The outer surface has a sealing element and two protruding ribs located on opposite sides of the sealing element. The height of the two protruding ribs is greater than that of the sealing element. The assembly of the control valve will compress the two protruding ribs and the sealing element, causing the two protruding ribs and the sealing element to deform. In this way, when the outer surface of the recessed portion is subjected to hydraulic pressure, the explosion-proof diaphragm can quickly deform to open the control valve. Conversely, when the inner surface of the recessed portion is subjected to hydraulic pressure, the explosion-proof diaphragm can maintain its original shape through the reinforcing steps to close the control valve, thereby improving the problem of uneven pressure on the explosion-proof diaphragm and extending its service life.

Description

Technical Field

[0001] This invention relates to a control valve with an explosion-proof diaphragm, particularly one in which the explosion-proof diaphragm is designed to have a recessed portion. When the outer surface of the recessed portion is subjected to hydraulic pressure, the explosion-proof diaphragm can quickly deform to open the control valve. Conversely, when the inner surface of the recessed portion is subjected to hydraulic pressure, the explosion-proof diaphragm can maintain its original shape through a reinforcing step to close the control valve, thereby improving the problem of uneven pressure on the explosion-proof diaphragm and extending its service life. Prior Technology

[0002] In the industrial field, control valves are an important product. Control valves can control the input or output flow rate and pressure by changing the cross-sectional area of ​​the fluid path in the pipeline. They can open, close, or adjust the valve speed through various control signals such as electronic signals, pressure, or mechanical force, thereby changing the size of the opening of the fluid through the valve body and achieving the purpose of precisely controlling the flow rate and pressure, thereby reducing the phenomenon of water hammer.

[0003] Control valves can be classified according to their internal mechanisms into constant water level valves, pressure reducing valves, pressure relief valves, pressure sustaining valves, back pressure valves, slow-closing check valves, solenoid control valves, constant flow valves, constant differential pressure valves, and so on.

[0004] However, common control valves consist of a valve cover, a valve body, and a diaphragm between the valve cover and the valve body. The diaphragm is usually a single-layer arc-shaped elastic diaphragm, which is used to isolate the fluid from the drive mechanism to achieve precise flow control. When a large amount of fluid enters the control valve, the fluid will continuously contact the diaphragm, making the diaphragm prone to rupture and damage. As a result, the diaphragm must be replaced many times to maintain the normal operation of the control valve, which is troublesome and time-consuming. Summary of the Invention

[0005] The main objective of this invention is to improve the structural form of the explosion-proof diaphragm, so that the improved explosion-proof diaphragm has a recessed portion, the inner surface of which has reinforcing steps protruding from the surface of the explosion-proof diaphragm, and the outer surface of which has a sealing element and two protruding ribs on opposite sides of the sealing element. In this way, when the outer surface of the recessed portion is subjected to hydraulic pressure, the explosion-proof diaphragm can quickly deform to open the control valve. Conversely, when the inner surface of the recessed portion is subjected to hydraulic pressure, the explosion-proof diaphragm can maintain its original shape through the reinforcing steps to close the control valve, thereby improving the problem of uneven pressure on the explosion-proof diaphragm and extending its service life.

[0006] A secondary objective of this invention is to provide a control valve with an explosion-proof diaphragm, wherein the outer surface of the explosion-proof diaphragm has ribs and a seal, such that when fluid comes into contact with the explosion-proof diaphragm, the explosion-proof diaphragm deforms and moves closer to the valve body, causing the control valve's retaining ribs to squeeze the two ribs and the seal of the explosion-proof diaphragm, thereby deforming the two ribs and the seal and reducing the chance of the explosion-proof diaphragm shaking.

[0007] To achieve the aforementioned objective, the present invention provides an explosion-proof diaphragm that is assembled into a control valve. In this preferred embodiment, the control valve is a control valve with an explosion-proof diaphragm, and the control valve with the explosion-proof diaphragm has a valve body, a valve cover, the explosion-proof diaphragm disposed between the valve body and the valve cover, a plurality of locking fasteners, and an elastic member. The explosion-proof diaphragm includes a recessed portion and an annular portion.

[0008] The valve body has an inlet, an outlet, and a valve seat disposed between the inlet and the outlet. The valve seat has a set of connectors and a plurality of locking holes. In this preferred embodiment, the set of connectors is a retaining rib, and the plurality of locking holes are disposed on the outer periphery of the retaining rib. The valve cover has a central opening, a limiting channel communicating with the central opening, and a plurality of openings disposed on the outer periphery of the central opening.

[0009] However, the recessed portion of the explosion-proof diaphragm has an inner surface and an outer surface. A reinforcing step is formed on each of the opposite sides of the inner surface, such that a central groove is formed between the two reinforcing steps. A positioning post is provided on the inner surface in the central groove. The reinforcing step has a vertical surface spaced apart from the positioning post and a horizontal surface higher than the top of the positioning post. The two reinforcing steps are respectively arranged on one side of the positioning post to be symmetrically arranged with each other, so that the two horizontal surfaces also present the symmetrical state. The reinforcing step is constructed with an arc-shaped profile, which fits the inner surface of the recessed portion.

[0010] The outer surface has a sealing element arranged in the same direction as the central groove and two protruding ribs located on opposite sides of the sealing element. The sealing element includes a stepped portion and a plurality of racks connected to the stepped portion. One end of the stepped portion is adjacent to one side of the annular portion, and the other end of the stepped portion is adjacent to the other opposite side of the annular portion. The opposite ends of the plurality of racks extend beyond the stepped portion to connect to the bottom surface of the annular portion.

[0011] However, a clamping space is formed between the two convex ribs, and the height of the two convex ribs is greater than that of the seal, while the length of the two convex ribs is less than that of the seal. The two convex ribs are arranged parallel to each other in a central section of the seal. The convex rib has a top adjacent to the explosion-proof diaphragm and a bottom away from the explosion-proof diaphragm, and the convex rib has a tapering trapezoidal shape from the top to the bottom.

[0012] Furthermore, the annular portion extends outward from the periphery of the recessed portion, and the plurality of locking fasteners are sequentially inserted into the valve cover and the valve body to form a flow space, and the explosion-proof diaphragm is clamped in the flow space, and the flow space has an inlet chamber formed at the inlet, an outlet chamber formed at the outlet, and a fluid chamber disposed above the inlet chamber and the outlet chamber.

[0013] However, the two opposite ends of the elastic element are respectively connected to the central opening and the positioning post, so that the elastic element is confined in the fluid chamber and the limiting channel to generate deformation.

[0014] When a fluid enters the fluid chamber through the central opening and passes through the inner surface of the explosion-proof diaphragm, the fluid will contact the reinforcing step and the positioning post, thereby reducing the chance of the fluid squeezing the explosion-proof diaphragm and causing it to rupture and be damaged. The explosion-proof diaphragm will deform to approach the valve body, so that the two convex ribs and the seal are squeezed by the retaining ribs, thereby deforming the two convex ribs and the seal.

[0015] Furthermore, when the fluid passes through the outer surface of the explosion-proof diaphragm, the fluid will contact the protruding ribs of the seal, causing the two ribs and the seal to be recessed into the central groove together, and the two reinforcing steps and the positioning post are driven together to approach the valve cover of the control valve.

[0016] The invention is characterized by an explosion-proof diaphragm having two reinforcing steps on its inner surface and a positioning post for elastic connection, while the outer surface of the explosion-proof diaphragm has a sealing element and two protruding ribs on the opposite side of the sealing element. Each reinforcing step has a vertical surface spaced apart from the positioning post and a horizontal surface higher than the top of the positioning post. The two reinforcing steps are respectively arranged symmetrically on one side of the positioning post, making the two horizontal surfaces symmetrical as well. Furthermore, the control valve with the explosion-proof diaphragm further has retaining ribs. When the outer surface is subjected to hydraulic pressure, the explosion-proof diaphragm can quickly deform to open the control valve. Conversely, when the inner surface is subjected to hydraulic pressure, the explosion-proof diaphragm can maintain its original shape through the reinforcing steps to close the control valve, thereby improving the problem of uneven pressure on the explosion-proof diaphragm and extending its service life. In addition, the explosion-proof diaphragm deforms to approach the valve body, causing the retaining ribs of the control valve to compress the two protruding ribs and the sealing element of the explosion-proof diaphragm, resulting in deformation of the two protruding ribs and the sealing element, thereby reducing the chance of the explosion-proof diaphragm shaking. Simple Explanation of the Diagram

[0017] Figures 1 and 2 are perspective views of the explosion-proof diaphragm of the present invention; Figure 3 is a cross-sectional view of the explosion-proof diaphragm of the present invention; Figure 4 is an enlarged view of part A in Figure 3; Figure 5 is an exploded view of a control valve with an explosion-proof diaphragm; Figure 6 is a cross-sectional view of a control valve with an explosion-proof diaphragm in the closed state; and Figures 7 and 8 are cross-sectional views of a control valve with an explosion-proof diaphragm in the open state. Implementation

[0018] To facilitate a deeper and more detailed understanding of the structure, use, and features of the present invention, preferred embodiments are described below in conjunction with the accompanying drawings:

[0019] Please refer to Figures 1 to 5. The explosion-proof diaphragm 1 of the present invention is assembled into a control valve 20. In this preferred embodiment, the control valve 20 is a control valve 21 with an explosion-proof diaphragm. The control valve 21 with the explosion-proof diaphragm is mainly composed of the explosion-proof diaphragm 1, a valve body 30, a valve cover 40, a plurality of locking fasteners 50, and an elastic element 60. The explosion-proof diaphragm 1 is constructed with two rubber layers 10 and a non-woven fabric layer 11 sandwiched between the two rubber layers 10, thus providing protection against explosions. The explosion-proof diaphragm 1 can increase its elongation and generate greater pressure resistance by incorporating the fabric properties of the non-woven fabric layer 11, thereby reducing the chance of deformation of the explosion-proof diaphragm 1. However, there are no restrictions on the composition of the rubber layer 10 and the non-woven fabric layer 11. The rubber layer 10 can be a rubber-like resin material, a gel-like resin material, a liquid material, etc., while the non-woven fabric layer 11 can be a nylon mesh fiber material, a natural fiber material, a glass fiber material, etc.

[0020] Please refer to Figures 1 to 5. The explosion-proof diaphragm 1 includes a recessed portion 12 and an annular portion 13 extending outward from the periphery of the recessed portion 12. The recessed portion 12 has an inner surface 14 and an outer surface 15. The inner surface 14 is constructed with two reinforcing steps 141, a central groove 142, and a positioning post 143. The two reinforcing steps 141 are respectively disposed on opposite sides of the inner surface 14, and the central groove 142 is formed between the two reinforcing steps 141. The positioning post 143 is formed in a cylindrical shape and disposed in the central groove 142, such that the positioning post 143 is disposed between the two reinforcing steps 141. Step 141 has a vertical surface 144 spaced apart from the positioning post 143, a horizontal surface 145 higher than the top of the positioning post 143, and an arc-shaped plate 146 connecting the vertical surface 144 and the horizontal surface 145. A portion of the outline of the vertical surface 144 and a portion of the outline of the horizontal surface 145 are in contact with the inner surface 14 of the recess 12. The arc-shaped plate 146 is constructed with an arc-shaped outline 147, which fits against the inner surface 14 of the recess 12. The two reinforcing steps 141 are respectively disposed on one side of the positioning post 143 and arranged symmetrically to each other, so that the two horizontal surfaces 145 also present the symmetrical state.

[0021] Please refer to Figures 1 to 5. The outer surface 15 is constructed with a sealing element 151 and two protruding ribs 152 located on opposite sides of the sealing element 151. The sealing element 151 is arranged in the same direction as the central groove 142. The sealing element 151 has a stepped portion 153 and a plurality of racks 154. The stepped portion 153 is connected between the outer surface 15 and the plurality of racks 154. One end of the stepped portion 153 is adjacent to one side of the annular portion 13, and the other end of the stepped portion 153 is adjacent to the other opposite side of the annular portion 13. The opposite ends of the plurality of racks 154 extend beyond the stepped portion 153 to connect to the bottom surface 131 of the annular portion 13. The plurality of racks 154 form a serrated shape along the outer periphery of the stepped portion 153.

[0022] Please refer to Figures 2, 3, and 4. The two protruding ribs 152 and the sealing member 151 are disposed on opposite sides of the central groove 142, and a clamping space 16 is provided between the two protruding ribs 152. The sealing member 151 is also disposed in the clamping space 16. The protruding rib 152 has a top 155 adjacent to the outer surface 15 and a bottom 156 away from the outer surface 15. The protruding rib 152 forms a tapering trapezoidal shape from the top 155 to the bottom 156 of the explosion-proof diaphragm 1. The two ribs 152 are higher than the seal 151. Furthermore, each rib 152 has a vertical surface 157 spaced apart from the seal 151 and an inclined surface 158 inclined to the vertical surface 157. The vertical surface 157 of the rib 152 is located between the seal 151 and the inclined surface 158. However, the length of the two ribs 152 is less than the length of the seal 151, and the two ribs 152 are arranged parallel to each other in a central section 159 of the seal 151.

[0023] Please refer to Figures 1, 2 and 5. In this preferred embodiment, the annular portion 13 has a plurality of through holes 132, and the plurality of through holes 132 are equally spaced around the outer periphery of the recessed portion 12. However, there is no limitation on the number of the plurality of through holes 132. The number of the plurality of through holes 132 can be two, five, ten or twenty, etc.

[0024] Please refer to Figures 5, 6, 7, and 8. In this preferred embodiment, the valve body 30 has an inlet 31, an outlet 32, and a valve seat 33 disposed between the inlet 31 and the outlet 32. The valve seat 33 is constructed with an arc-shaped groove 34 and a peripheral region 35 extending outward from the periphery of the arc-shaped groove 34. The arc-shaped groove 34 has a set of connectors 36 inside. In this preferred embodiment, the set of connectors 36 is a retaining rib 37, and the peripheral region 35 has a plurality of locking holes 38. The plurality of locking holes 38 are equidistantly arranged around the outer periphery of the retaining rib 37. However, there is no limitation on the number of the plurality of locking holes 38. The number of the plurality of locking holes 38 can be two, five, ten, or twenty, etc.

[0025] Please refer to Figures 5, 6, 7 and 8. In this preferred embodiment, the valve cover 40 has a central opening 41, a limiting channel 42 communicating with the central opening 41, and a plurality of openings 43 disposed around the outer periphery of the central opening 41. The plurality of openings 43 are evenly spaced around the outer edge of the valve cover 40. However, there is no limitation on the number of the plurality of openings 43. The number of the plurality of openings 43 can be two, five, ten or twenty, etc.

[0026] Please refer to Figures 5, 6, 7, and 8. In this preferred embodiment, each locking fastener 50 is sequentially inserted into the opening 43 of the valve cover 40, the through hole 132 of the explosion-proof diaphragm 1, and the locking hole 38 of the valve body 30, so that the valve cover 40 is assembled above the valve body 30 to form a flow space 44, and the explosion-proof diaphragm 1 is clamped in the flow space 44, so that the explosion-proof diaphragm 1 is disposed between the valve body 30 and the valve cover 40, and the flow space 44 has an inlet chamber 45 formed in the inlet 31 and a... The outlet 32 ​​has an outlet chamber 46 and a fluid chamber 47 disposed above the inlet chamber 45 and the outlet chamber 46. However, in this preferred embodiment, the internal space of both the inlet chamber 45 and the outlet chamber 46 is larger than the internal space of the fluid chamber 47. Furthermore, the two opposite ends of the elastic member 60 are respectively connected to the central opening 41 and the positioning post 143, so that a part of the elastic member 60 is located in the limiting channel 42, and the elastic member 60 is restricted in the fluid chamber 47 and the limiting channel 42 to generate deformation.

[0027] Please refer to Figures 3, 4, 5, and 6. In this preferred embodiment, when a fluid 70 enters from the limiting channel 42 and enters the fluid chamber 47 through the central opening 41, the fluid 70 can contact the inner surface 14 of the explosion-proof diaphragm 1, the vertical surface 144 and the horizontal surface 145 of the reinforcing step 141, and the positioning post 143. This increases the contact time of the fluid 70 with the inner surface 14 of the explosion-proof diaphragm 1, while reducing the compression of the explosion-proof diaphragm by the fluid 70. 1. This creates an opportunity for rupture and damage. Therefore, when the inner surface 14 of the recess 12 is subjected to hydraulic pressure, the explosion-proof diaphragm 1 can maintain its original shape through the reinforcing step 141 to close the control valve 21 with the explosion-proof diaphragm, thereby improving the problem of uneven pressure on the explosion-proof diaphragm 1 and extending its service life. In addition, the elastic member 60 assembled on the positioning post 143 will be stretched and deformed, causing the explosion-proof diaphragm 1 to also be stretched and deformed, moving the explosion-proof diaphragm 1 away from the valve cover 40. As the valve body 30 approaches, the two protruding ribs 152 and the seal 151 gradually approach the valve body 30. The two protruding ribs 152 move towards the seal 151 to clamp the retaining rib 37, causing the two protruding ribs 152 and the seal 151 to be deformed by the retaining rib 37. This increases the internal space of the fluid chamber 47, preventing the inlet chamber 45 from connecting to the outlet chamber 46, thereby allowing the control valve 21 with the explosion-proof diaphragm to... A tightly sealed closed state 80 is formed, preventing the fluid 70 in the inlet chamber 45 from entering the outlet chamber 46. Furthermore, in this preferred embodiment, when the explosion-proof diaphragm 1 is damaged and cannot be used, it is only necessary to remove the plurality of locking fasteners 50 from the valve cover 40, the explosion-proof diaphragm 1, and the valve body 30 to remove the damaged explosion-proof diaphragm 1 from the control valve 21 with the explosion-proof diaphragm for replacement or repair, thereby achieving the purpose of quickly and conveniently removing the explosion-proof diaphragm 1.

[0028] Please refer to Figures 1, 2, 3, 4, 5, 7, and 8. In this preferred embodiment, when the fluid 70 is discharged from the fluid chamber 47 and moves out of the control valve 21 with the explosion-proof diaphragm through the central opening 41 and the limiting channel 42, the elastic member 60 assembled on the positioning post 143 is compressed and deformed, and the explosion-proof diaphragm 1 is also compressed and deformed, causing the explosion-proof diaphragm 1 to approach the valve cover 40 and move away from the valve body 30. The two protruding ribs 152 and the sealing member 151 gradually move away from the valve body 30, reducing the internal space of the fluid chamber 47 and preventing it from storing pressure. Consequently, the inlet chamber 45 connects to the outlet chamber 46, thereby opening the control valve 21 with the explosion-proof diaphragm to an open state 90, allowing the fluid 70 in the inlet chamber 45 to enter the outlet chamber 46. The fluid 70 can pass through the outer surface 15 of the explosion-proof diaphragm 1. When the outer surface 15 of the recess 12 is subjected to hydraulic pressure, the explosion-proof diaphragm 1 can quickly deform to open the control valve 21 with the explosion-proof diaphragm. The fluid 70 will continuously contact the two protruding ribs 152 protruding from the seal 151, so that the two protruding ribs 152 and the seal 151 are concave into the central groove 142 to approach the valve cover 40. The two reinforcing steps 141 and the positioning post 143 will also be driven to approach the valve cover 40. In other words, the input pressure, input flow rate, output pressure and output flow rate of the fluid 70 can be controlled through the control valve 21 with the explosion-proof diaphragm, thereby adjusting the opening speed and closing speed generated by the control valve 21 with the explosion-proof diaphragm, thereby reducing the chance of water hammer caused by the control valve 21 with the explosion-proof diaphragm.

[0029] 1: Explosion-proof diaphragm 10: Rubber layer 11: Non-woven fabric layer 12: Depression 13: Ring section 131: Bottom face 132: Through hole 14: Inner surface 141: Enhancement Tier 142: Central Slot 143: Positioning Post 144: Vertical plane 145: Horizontal plane 146: Curved plate 147: Curved outline 15: Outer surface 151: Seals 152: Convex Rib 153: Step section 154: rack and pinion 155: Top 156: Bottom 157: Vertical plane 158: Sloping Surface 159: Central Section 16: Clamping Space 20: Control valve 21: Control valve with explosion-proof diaphragm 30: Valve body 31: Entrance 32: Exports 33: Valve seat 34: Arc-shaped groove 35: Outer Area 36: Assembly Components 37: Rib Block 38: Keyhole 40: Valve cover 41: Central opening 42: Limiting Channel 43: Opening 44: Circulation Space 45: Enter the dental room 46: Exit the oral cavity 47: Fluid Chamber 50: Locking fasteners 60: Elastic element 70: Fluid 80: Closed 90: On status

Claims

1. An explosion-proof diaphragm, comprising: a recess having an inner surface and an outer surface, wherein a reinforcing step is formed on each of the opposite sides of the inner surface such that a central groove is formed between the two reinforcing steps, and a positioning post is provided on the inner surface in the central groove; the outer surface having a sealing element arranged in the same direction as the central groove and two protruding ribs located on opposite sides of the sealing element; and an annular portion extending outward from the periphery of the recess; wherein, A clamping space is formed between the two convex ribs, and the height of the two convex ribs is greater than that of the seal. When the explosion-proof diaphragm is assembled to a control valve, a set of connectors of the control valve will squeeze the two convex ribs and the seal, causing the two convex ribs and the seal to deform.

2. The explosion-proof diaphragm as described in claim 1, wherein, The reinforced step has a vertical surface spaced apart from the positioning post and a horizontal surface higher than the top of the positioning post.

3. The explosion-proof diaphragm as described in claim 2, wherein, The two reinforcing steps are respectively set on one side of the positioning column and arranged symmetrically to each other, so that the two horizontal planes also present the same symmetrical state.

4. The explosion-proof diaphragm as described in claim 1, wherein, The reinforced step has an arc-shaped profile that fits the inner surface of the recess, so that when a fluid passes through the inner surface of the explosion-proof diaphragm, the fluid will contact the reinforced step and the positioning post, thereby reducing the chance of the fluid squeezing the explosion-proof diaphragm and causing it to rupture and be damaged.

5. The explosion-proof diaphragm as described in claim 4, wherein, When the fluid passes through the outer surface of the explosion-proof diaphragm, the fluid comes into contact with the protruding ribs of the seal, causing the two ribs and the seal to be recessed into the central groove, and the two reinforcing steps and the positioning post are moved together to approach the valve cover of the control valve.

6. The explosion-proof diaphragm as described in claim 1, wherein, The length of the two ribs is less than that of the seal, and the two ribs are arranged parallel to each other in a central section of the seal.

7. The explosion-proof diaphragm as described in claim 1, wherein, The seal includes a stepped portion and a plurality of racks connected to the stepped portion, one end of the stepped portion being adjacent to one side of the annular portion, and the other end of the stepped portion being adjacent to the other opposite side of the annular portion.

8. The explosion-proof diaphragm as described in claim 7, wherein, The two opposite ends of the plurality of racks extend beyond the stepped portion to connect to the bottom surface of the ring portion.

9. The explosion-proof diaphragm as described in claim 1, wherein, The rib has a top adjacent to the explosion-proof membrane and a bottom away from the explosion-proof membrane, and the rib has a tapering trapezoidal shape from the top to the bottom.

10. A control valve with an explosion-proof diaphragm, comprising: a valve body having an inlet, an outlet, and a valve seat disposed between the inlet and the outlet, the valve seat having a retaining rib and a plurality of locking holes disposed on the outer periphery of the retaining rib; a valve cover having a central opening, a limiting channel communicating with the central opening, and a plurality of openings disposed on the outer periphery of the central opening; and an explosion-proof diaphragm disposed between the valve body and the valve cover, and comprising: A recessed portion has an inner surface and an outer surface. A reinforcing step is formed on each of the opposite sides of the inner surface, such that a central groove is formed between the two reinforcing steps. A positioning post is provided on the inner surface within the central groove. The outer surface has a sealing element arranged in the same direction as the central groove and two protruding ribs located on opposite sides of the sealing element. A clamping space is formed between the two protruding ribs, and the height of the two protruding ribs is greater than that of the sealing element. An annular portion extends outward from the periphery of the recessed portion. A plurality of locking fasteners are sequentially inserted into the valve cover and the valve body to form a flow space. The explosion-proof diaphragm is clamped within the flow space. The flow space has an inlet chamber formed at the inlet, an outlet chamber formed at the outlet, and a fluid chamber disposed above the inlet and outlet chambers. An elastic member has two opposite ends respectively connected to the central opening and the positioning post, such that the elastic member is constrained within the fluid chamber and the limiting channel to deform. When a fluid enters the fluid chamber through the central opening, the fluid comes into contact with the reinforcing step, causing the explosion-proof diaphragm to deform and approach the valve body. This causes the two convex ribs and the seal to be squeezed by the retaining ribs, thereby deforming the two convex ribs and the seal.

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