Suspension type safety valve and pressure release valve mechanism

Abstract

The utility model belongs to the technical field of pressure adjusting equipment, and particularly relates to a suspension type safety valve and pressure release valve mechanism which comprises a valve body, an air inlet hole is formed in the valve body, a protruding valve seat is arranged at the position, at the tail of the air inlet hole, of the valve body, a valve clack is installed in the valve body, and an adjusting nut is arranged on the upper portion of the valve body. A spring is installed between the adjusting nut and the valve clack, and the valve clack enables the sealing position of the valve clack to be in contact sealing with the valve seat under the acting force of the spring. The safety valve has the advantages that the machining precision, the performance requirement and the manufacturing cost of the spring are reduced, no matter how the safety valve is installed, the influence of the weight on the opening pressure of the safety valve is reduced to the minimum, and it is ensured that the opening pressure of a product can be consistent with that of a product in a factory pressure regulation test.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure regulating equipment, and in particular relates to a suspended safety valve and a pressure relief valve mechanism. Background Art

[0002] Safety valves and pressure relief valves are common devices on pressure vessels. They automatically discharge the internal medium when the pressure exceeds the set value to protect the equipment and personnel. Safety valves are also often installed on gas pressure reducing valves to automatically and quickly release pressure when the pressure is too high.

[0003] Some safety valves require manual pressure relief devices. Since the manual pressure relief device itself has weight, the manufacturer generally prevents adjustment of the safety valve in a vertical position during factory adjustment and pressure test. The manual pressure relief device will press on the valve disc, resulting in the superposition of the gravity of the manual pressure relief device and the spring force. The safety valve may not be placed horizontally or vertically during installation. Therefore, due to different installation positions and angles, the manual pressure relief device may press on the valve disc of the safety valve with different forces. At some installation angles, the manual pressure relief device may not even contact the valve disc, causing the opening pressure of the safety valve to be different from the pressure set when the safety valve leaves the factory.

[0004] If the safety valve and pressure relief valve are relatively small or even micro, then due to their relatively small diameters, their spring output forces will also be relatively small, which will cause the gravity of the manual pressure relief device to account for a larger proportion of the spring force, causing the opening pressure of the safety valve to seriously deviate from the set value.

[0005] In a closed piping system, customers generally require that the gas pressure reducer be equipped with a manual pressure relief device so that pressure relief can be performed manually. The diameter of the safety valve body on the gas pressure reducer is generally around φ18mm, which is very small. Therefore, the spring inside it is naturally smaller and thinner. Therefore, due to different installation angles, the force exerted by the manual pressure relief device on the gasket seat will be different, thereby affecting the opening pressure of the safety valve. In addition, if the spring is relatively small, because the spring stiffness formula is Where d is the wire diameter (the mechanical design manual has a specific calculation formula for springs). For large springs with a spring wire diameter of 8mm or 10mm, a spring wire diameter error of ±0.1mm has little effect on the spring stiffness. However, since the safety valve on the gas pressure reducer is small, its spring wire diameter is generally around φ1.5mm. Therefore, a spring wire diameter error of ±0.1mm has a huge impact on the spring stiffness. In order to fix the opening pressure of the safety valve during mass production, the spring output force must be relatively fixed, which leads to very high requirements on the spring processing accuracy. The extremely high cost of the spring will affect the product's market competitiveness. Utility Model Content

[0006] In order to overcome the deficiencies of the background technology, the utility model provides a suspended safety valve and a pressure relief valve mechanism.

[0007] The technical solution of the utility model is: it includes a valve body, an air inlet hole is provided on the valve body, a raised valve seat is provided on the valve body at the tail of the air inlet hole, a valve disc is installed in the valve body, an adjusting nut is provided on the upper part of the valve body, a spring is installed between the adjusting nut and the valve disc, and the valve disc makes the sealing part of the valve disc contact and seal with the valve seat under the action of the spring.

[0008] A pull rod is installed in the valve body, and the other end of the pull rod extends to the outside of the valve body. The pull rod is provided with a positioning mechanism for limiting the downward movement of the pull rod. The positioning mechanism limits the downward movement distance of the pull rod. When the positioning mechanism limits the movement of the pull rod, there is a suspension distance between the bottom of the pull rod and the bottom of the valve disc. When the upward movement distance of the pull rod is greater than the suspension distance, the pull rod drives the valve disc to move upward.

[0009] Preferably, a ball head cavity is provided in the valve disc, and a throat is provided at the head of the ball head cavity. The inner diameter of the throat is smaller than the inner diameter of the ball head cavity. A ball head is provided at the end of the pull rod close to the valve disc, and the ball head is located inside the ball head cavity. The outer diameter of the ball head is greater than the inner diameter of the throat, and the outer diameter of the ball head is less than the inner diameter of the ball head cavity.

[0010] Preferably, the inner diameter of the constricted throat is smaller than the inner diameter of the ball head cavity and is manufactured integrally using a spinning process. The spinning process presses on the outer diameter of the valve disc during manufacturing, thereby reducing the constricted throat of the ball head cavity.

[0011] Preferably, a first external thread is provided at the outer diameter of the adjusting nut, and a first internal thread is provided at the upper portion of the valve body, and the first external thread and the first internal thread cooperate with each other to form a threaded connection.

[0012] Preferably, a second groove is provided on the upper portion of the adjusting nut, and the second groove is a slot or a cross slot.

[0013] Preferably, a radially protruding first circular boss is provided on the top of the adjusting nut, and straight knurling or reticulated knurling is provided on the outer diameter direction of the first circular boss.

[0014] Preferably, a pull rod hook is provided at the bottom of the pull rod, and a valve flap hook is provided at the upper part of the valve flap. When the pull rod is installed, the suspended distance is the distance between the pull rod hook and the bottom of the valve flap. The pull rod hook and the valve flap hook will hook each other after the pull rod moves upward for a distance.

[0015] Preferably, a pull rod hook is provided at the bottom of the pull rod, and a positioning pin is provided on the upper part of the valve disc. When the pull rod is installed, the suspension distance is the distance between the pull rod hook and the bottom of the valve disc. After the pull rod moves upward for a distance, the pull rod hook will hook the positioning pin.

[0016] Preferably, a first through hole is provided in the portion of the pull rod outside the valve body, a pull ring is installed in the first through hole, and the first through hole and the pull ring constitute a positioning mechanism to limit the downward movement distance of the pull rod.

[0017] Preferably, a plastic seal is also installed in the first through hole. The plastic seal can also be made of other materials such as lead seal and other methods. Only this material will be destroyed during disassembly. Plastic seal is a conventional technical solution in this technical field and has multiple implementation methods, which will not be listed one by one.

[0018] Preferably, a circular ring or U-shaped round steel is welded to the top of the pull rod outside the valve body, and the circular ring or U-shaped round steel constitutes a positioning mechanism to limit the downward movement distance of the pull rod.

[0019] Preferably, a second circular boss is provided on the top of the pull rod outside the valve body, the outer diameter of the second circular boss is greater than the outer diameter of the pull rod body, and the second circular boss constitutes a positioning mechanism.

[0020] Preferably, a first groove is provided inside the valve flap, and a sealing gasket is installed in the first groove.

[0021] Preferably, the head of the first groove is provided with a clamping platform which is smaller than the inner diameter of the first groove, the outer diameter of the sealing gasket is greater than the inner diameter of the clamping platform, and the sealing gasket is installed in an interference fit with the first groove.

[0022] Preferably, the sealing gasket is directly adhered to the first groove through a vulcanization process.

[0023] Preferably, the valve body is sealed by the valve disc and the valve seat and is divided into an air inlet cavity and an exhaust cavity. The air inlet cavity is located below the valve seat and communicates with the air inlet hole. The exhaust cavity is located above the valve seat. An exhaust hole is provided on the valve body, and the exhaust hole is communicated with the exhaust cavity of the valve body.

[0024] Preferably, the clamping block includes a second internal thread at the head of the ball head cavity, a second external thread on the outer diameter of the clamping block, and the second internal thread and the second external thread cooperate with each other. A second through hole is provided in the middle of the clamping block, the size of the second through hole being less than the outer diameter of the ball head of the tie rod, and the size of the second through hole being greater than the outer diameter of the tie rod body.

[0025] Preferably, the second through hole of the clamping block is a hexagonal hole, the opposite sides of the hexagonal hole of the second through hole are less than the outer diameter of the ball head of the pull rod, and the opposite sides of the hexagonal hole of the second through hole are greater than the outer diameter of the pull rod body.

[0026] Preferably, a valve cover is installed at the end of the valve body where the adjusting nut is located. The valve cover is a cover with a hole in the middle, and the inner wall of the valve cover is provided with a plurality of cylinders with inward-facing ball heads.

[0027] The beneficial effect of the present invention is that the processing accuracy, performance requirements and manufacturing cost of the spring are reduced. No matter how the present invention is installed, the influence of weight on the opening pressure of the safety valve is reduced to a minimum, ensuring that the opening pressure of the product is consistent with that during the factory pressure adjustment test. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an exploded schematic diagram of the present utility model.

[0029] Figure 2-7 It is a structural diagram of the present utility model.

[0030] Figure 8 This is a structural diagram of the valve cover of the utility model.

[0031] Figure 9 for Figure 2 A partial enlarged view of .

[0032] Figure 10 This is a structural diagram of the card block of the utility model.

[0033] Figure 11-12 This is a structural diagram of another embodiment of the valve disc, spring, adjusting nut and pull rod of the utility model.

[0034] Figure 13 This is a structural schematic diagram of another embodiment of the valve disc, adjusting nut and pull rod of the utility model.

[0035] Figure 14 This is a perspective exploded schematic diagram of another embodiment of the present invention.

[0036] Figure 15 This is a perspective exploded schematic diagram of another embodiment of the present invention.

[0037] Figures 1-15 1. Valve body; 11. Air inlet; 12. Exhaust hole; 13. Valve seat; 131. Inclined surface; 14. First internal thread; 15. Air inlet cavity; 16. Exhaust cavity; 2. Valve disc; 21. Ball head cavity; 211. Constricted throat; 212. Interior; 2111. Second internal thread; 22. First groove; 221. Clamping platform; 23. Clamping block; 231. Second external thread; 232. Second through hole; 2 4. Valve disc hook; 25. Locating pin; 3. Spring; 4. Adjusting nut; 41. First external thread; 42. Second groove; 43. First circular boss; 5. Valve cover; 51. Cylinder; 52. Valve cover hole; 6. Pull rod; 61. Ball head; 62. First through hole; 63. Second circular boss; 64. Pull rod hook; 7. Pull ring; 71. Ring; 8. Sealing gasket; 10. Plastic seal; A. Suspension distance. DETAILED DESCRIPTION

[0038] The following is a further description of the embodiments of the present invention with reference to the accompanying drawings:

[0039] like Figures 1-15 As shown, this embodiment provides a suspended safety valve and pressure relief valve mechanism, including a valve body 1, an air inlet 11 is provided on the valve body 1, and the air inlet 11 is connected to a cavity that requires automatic pressure relief of the valve installed in the utility model product, and a raised valve seat 13 is provided on the valve body 1 at the tail end of the air inlet 11, a valve disc 2 is installed in the valve body 1, an adjusting nut 4 is provided on the upper part of the valve body 1, and a spring 3 is installed between the adjusting nut 4 and the valve disc 2. Under the action of the spring 3, the valve disc 2 makes the sealing part of the valve disc 2 contact and seal with the valve seat 13.

[0040] A pull rod 6 is installed in the valve body 1, and the other end of the pull rod 6 extends to the outside of the valve body 1. The pull rod 6 is provided with a positioning mechanism for limiting the downward movement of the pull rod 6. The positioning mechanism limits the downward movement distance of the pull rod 6. When the positioning mechanism limits the movement of the pull rod 6, there is a suspension distance A between the bottom of the pull rod 6 and the bottom of the valve disc 2. When the upward movement distance of the pull rod 6 is greater than the suspension distance A, the pull rod 6 drives the valve disc 2 to move upward.

[0041] In this way, the sealing surface of the valve disc 2 is pressed against the valve seat 13 under the action of the spring 3, thereby achieving sealing. When the pressure in the air inlet hole 11 exceeds the set pressure, the valve disc 2 is subjected to the medium pressure and moves upward, pushing the spring 3 to release the pressure. When the pressure at the air inlet hole 11 is lower than the set pressure value, the valve disc 2 is reset under the action of the spring 3 to achieve the effect of resealing.

[0042] When manual pressure relief is required, the pull rod 6 is pulled upward for a certain period by hand, and the pull rod 6 drives the valve flap 2 to move upward, which will pull up the valve flap 2 and make the valve flap 2 leave the valve seat, thereby achieving the function of manual pressure relief.

[0043] In order to facilitate the separation and connection between the pull rod 6 and the valve disc 2. Figure 2-7 As shown, preferably, a ball head cavity 21 is provided in the valve disc 2, and a throat 211 is provided at the head of the ball head cavity 21. The inner diameter of the throat 211 is smaller than the inner diameter of the ball head cavity 21. The end of the pull rod 6 close to the valve disc 2 is provided with a ball head 61. The ball head 61 is located inside the ball head cavity 21. The outer diameter of the ball head 61 is greater than the inner diameter of the throat 211, and the outer diameter of the ball head 61 is less than the inner diameter 212 inside the ball head cavity 21. In this way, no matter how the new utility model is installed, the pull rod 6 cannot press against the valve disc 2 under the action of the positioning mechanism. At the same time, after the pull rod 6 is pulled upward for a distance, the ball head 61 will contact the head 211 of the ball head cavity 21, thereby driving the sealing surface of the valve disc 2 to separate from the valve seat 13, thereby achieving the effect of manual pressure relief.

[0044] In addition, the pull rod 6 of the utility model product is not fixedly connected to the valve disc 2, so no matter how the installation angle of the utility model product is, the weight of the pull rod 6 will not act on the valve disc 2, thereby not affecting the opening pressure of the utility model product.

[0045] In order to reduce the production cost of the valve disc 2, preferably, the inner diameter of the throat 211 is smaller than the inner diameter of the ball head cavity 21 and is made in one piece using a spinning process. The spinning process is pressed on the outer diameter of the valve disc 2 during production, thereby making the throat 211 of the ball head cavity 21 smaller.

[0046] Since the spring 3 is relatively small, its processing accuracy has a great influence on the output force of the spring 3, especially the error in the spring wire diameter. In order to reduce the processing progress and cost of the spring 3. Preferably, the outer diameter of the adjusting nut 4 is provided with a first external thread 41, and the upper part of the valve body 1 is provided with a first internal thread 14, and the first external thread 41 and the first internal thread 14 cooperate with each other to form a threaded connection. The upper part of the adjusting nut 4 is provided with a second groove 42, and the second groove 42 is a slot or a cross groove. In this way, the installation depth of the adjusting nut 4 can be adjusted by a slotted screwdriver or a special tool, thereby adjusting the installation height of the spring 3, realizing the adjustment of the output force of the spring 3, and ultimately reducing the processing accuracy requirements for the spring 3.

[0047] In order to facilitate the adjustment of the installation depth of the adjusting nut 4 and the rotation of the adjusting nut 4, as shown in FIG. Figure 7 As shown, preferably, a radially protruding first circular boss 43 is provided on the top of the adjusting nut 4 , and straight knurling or reticulated knurling is provided in the outer diameter direction of the first circular boss 43 .

[0048] The present utility model provides a second specific implementation scheme in which the pull rod 6 is separate from the valve disc 2 but can drive the valve disc 2 to move when the pull rod 6 moves upward. Preferably, a pull rod hook 64 is provided at the bottom of the pull rod 6, and a valve disc hook 24 is provided at the upper part of the valve disc 2. When the pull rod 6 is installed, the suspension distance A is the distance between the pull rod hook 64 and the bottom of the valve disc 2. The pull rod hook 64 and the valve disc hook 24 will hook each other after the pull rod 6 moves upward for a certain distance. The pull rod hook 64 and the valve disc hook 24 can be detached or hooked at any time, which plays the role of keeping the pull rod 6 suspended in the air. It also prevents the gravity of the manual pressure relief device from acting on the valve disc 2, thereby affecting the opening pressure value set by the product of the present utility model when it leaves the factory.

[0049] The present invention provides a third embodiment in which the pull rod 6 is separate from the valve disc 2 but can drive the valve disc 2 to move when the pull rod 6 moves upward. Preferably, a pull rod hook 64 is provided at the bottom of the pull rod 6, and a positioning pin 25 is provided at the upper portion of the valve disc 2. When the pull rod 6 is installed, the suspension distance A is the distance between the pull rod hook 64 and the bottom of the valve disc 2. After the pull rod 6 moves upward for a certain distance, the pull rod hook 64 will hook the positioning pin 25. This is equivalent to replacing the valve disc hook 24 in the second embodiment with a positioning pin 25, because the hook and positioning pin can be separated and hooked at any time.

[0050] In order to facilitate the pulling rod 6 to be pulled upward, as shown in FIG. Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 As shown, preferably, the portion of the pull rod 6 outside the valve body 1 is provided with a first through hole 62 , a pull ring 7 is installed in the first through hole 62 , and the first through hole 62 and the pull ring 7 constitute a positioning mechanism to limit the downward movement distance of the pull rod 6 .

[0051] In order to prevent the user from adjusting the installation height of the adjusting nut 4 by himself, preferably, a plastic seal 10 is also installed in the first through hole 62. The plastic seal 10 is provided with an iron wire that passes through the first through hole 62 and then returns to the plastic seal 10 for pressing to form a closed loop; the diameter of the double-sided iron wire + the diameter of the pull rod 6 > the diameter of the valve cover hole 52. The plastic seal 10 can also be lead sealed. Once the plastic seal 10 is damaged, it means that the valve cover 5 has been disassembled by someone.

[0052] The present invention has a second embodiment for the positioning mechanism. Preferably, a ring 71 or U-shaped round steel is welded to the top of the tie rod 6 outside the valve body 1. The ring 71 or U-shaped round steel constitutes a positioning mechanism to limit the downward movement distance of the tie rod 6. In this way, because the largest part of the ring 71 or U-shaped round steel is larger than the diameter of the tie rod 6 itself, the ring 71 or U-shaped round steel cannot pass through the inside of the valve cover 5, thereby limiting the downward movement distance of the tie rod 6.

[0053] The present invention offers a third embodiment for the positioning mechanism. Preferably, a second circular boss 63 is provided on the top of the tie rod 6, located outside the valve body 1. The outer diameter of this second circular boss 63 is greater than the outer diameter of the tie rod 6 itself, forming the positioning mechanism. This second circular boss 63 also limits the downward movement of the tie rod 6. Of course, this second circular boss 63 can also be replaced with a pin or other structure, as long as its size is larger than the inner hole of the valve cover 5.

[0054] In order to achieve better sealing, preferably, a first groove 22 is provided inside the valve flap 2, and a sealing gasket 8 is installed in the first groove 22. The sealing gasket 8 is made of rubber or plastic, preferably nitrile rubber, EPDM rubber, silicone rubber, fluororubber, or PU plastic.

[0055] To prevent the sealing gasket 8 from falling off from the first groove 22 by itself, preferably, the head of the first groove 22 is provided with a clamping platform 221 which is smaller than the inner diameter of the first groove 22, the outer diameter of the sealing gasket 8 is greater than the inner diameter of the clamping platform 221, and the sealing gasket 8 is installed with an interference fit with the first groove 22.

[0056] Preferably, the sealing gasket 8 is directly adhered to the first groove 22 through a vulcanization process. In this way, the sealing gasket 8 is directly integrated with the valve flap 2, greatly reducing the probability of the sealing gasket 8 falling off.

[0057] To improve sealing performance, preferably, a bevel 131 is provided at the outer diameter of the valve seat 13. The width of the valve seat 13 is less than 1 mm, preferably 0.25 mm. The small width of the valve seat 13 helps to increase the contact sealing pressure, thereby improving sealing performance.

[0058] Preferably, the valve body 1 is sealed by the valve disc 2 and the valve seat 13 to be divided into an air intake cavity 15 and an exhaust cavity 16. The air intake cavity 15 is located below the valve seat 13 and communicates with the air intake hole 11. The exhaust cavity 16 is located above the valve seat 13. An exhaust hole 12 is provided on the valve body 1, and the exhaust hole 12 is communicated with the exhaust cavity 16 of the valve body 1.

[0059] Preferably, a clamping block 23 is included. The head portion 211 of the ball head cavity 21 is provided with a second internal thread 2111. The outer diameter of the clamping block 23 is provided with a second external thread 231. The second internal thread 2111 and the second external thread 231 cooperate with each other. A second through hole 232 is provided in the middle of the clamping block 23. The size of the second through hole 232 is smaller than the outer diameter of the ball head 61 of the tie rod 6 and is larger than the outer diameter of the tie rod 6 body.

[0060] Preferably, the second through hole 232 of the clamping block 23 is a hexagonal hole. The opposite side of the hexagonal hole 232 is smaller than the outer diameter of the ball head 61 of the pull rod 6, and the opposite side of the hexagonal hole 232 is greater than the outer diameter of the pull rod 6 body. The hexagonal hole 232 facilitates tightening with a special wrench. Alternatively, the second through hole 232 can be a round hole, with an external hexagonal ball head above the clamping block 23, and tightened with an external hexagonal socket.

[0061] To reduce dust ingress, improve aesthetics, and prevent users from adjusting the installation height of the adjusting nut 4, which could affect the factory-set opening pressure of the present invention, the valve body 1 is preferably equipped with a valve cover 5 at the end of the adjusting nut 4. The valve cover 5 is a lid with a hole in the middle, and its inner wall is provided with multiple inward-facing cylindrical balls 51. The valve cover 5 is made of rubber or plastic, so that the inner cylinders 51 of the valve cover 5 can fit tightly with the outer diameter of the valve body 1, firmly clamping the valve cover 5 to the valve body 1. Therefore, if the user wants to turn the adjusting nut 4, they must first remove the valve cover 5, which will damage the plastic seal 10.

[0062] In addition, the medium is not limited to CO2, and some media are more suitable for hard sealing. Preferably, the sealing part of the valve disc 2 is built-up with hard alloy.

[0063] This embodiment should not be regarded as a limitation of the utility model, but any improvement based on the spirit of the utility model should be within the scope of protection of the utility model.

Claims

1. A suspended safety valve and pressure relief valve mechanism, comprising a valve body (1), wherein the valve body (1) is provided with an air inlet hole (11), and characterized in that: The valve body (1) is provided with a raised valve seat (13) at the tail end of the air inlet hole (11), a valve flap (2) is installed in the valve body (1), an adjusting nut (4) is provided on the upper part of the valve body (1), a spring (3) is installed between the adjusting nut (4) and the valve flap (2), and the valve flap (2) is caused to contact and seal at the sealing portion of the valve flap (2) with the valve seat (13) under the action of the spring (3); A pull rod (6) is installed in the valve body (1), and the other end of the pull rod (6) extends to the outside of the valve body (1). The pull rod (6) is provided with a positioning mechanism for limiting the downward movement of the pull rod (6). The positioning mechanism limits the downward movement distance of the pull rod (6). When the positioning mechanism limits the movement of the pull rod (6), a suspension distance (A) is provided between the bottom of the pull rod (6) and the bottom of the valve disc (2). When the upward movement distance of the pull rod (6) is greater than the suspension distance (A), the pull rod (6) drives the valve disc (2) to move upward.

2. A suspended safety valve and pressure relief valve mechanism according to claim 1, characterized in that: A ball head cavity (21) is provided in the valve disc (2), and a throat (211) is provided at the head of the ball head cavity (21). The inner diameter of the throat (211) is smaller than the inner diameter of the ball head cavity (21). A ball head (61) is provided at the end of the pull rod (6) close to the valve disc (2). The ball head (61) is located inside the ball head cavity (21), and the outer diameter of the ball head (61) is greater than the inner diameter of the throat (211). The outer diameter of the ball head (61) is less than the inner diameter of the inner (212) of the ball head cavity (21).

3. A suspended safety valve and pressure relief valve mechanism according to claim 2, characterized in that: The inner diameter of the constricted throat (211) is smaller than the inner diameter of the ball head cavity (21) and is integrally manufactured using a spinning process. During the spinning process, the outer diameter of the valve disc (2) is pressed, thereby reducing the constricted throat (211) of the ball head cavity (21).

4. A suspended safety valve and pressure relief valve mechanism according to claim 1, characterized in that: The adjusting nut (4) is provided with a first external thread (41) at the outer diameter thereof, the upper portion of the valve body (1) is provided with a first internal thread (14), the first external thread (41) and the first internal thread (14) cooperate with each other to form a threaded connection, the upper portion of the adjusting nut (4) is provided with a second groove (42), the second groove (42) being a straight groove or a cross groove.

5. The suspended safety valve and pressure relief valve mechanism according to claim 1, characterized in that: A pull rod hook (64) is provided at the bottom of the pull rod (6), and a valve disc hook (24) is provided at the upper part of the valve disc (2). When the pull rod (6) is installed, the hanging distance (A) is the distance between the pull rod hook (64) and the bottom of the valve disc (2). The pull rod hook (64) and the valve disc hook (24) will hook each other after the pull rod (6) moves upward for a distance.

6. A suspended safety valve and pressure relief valve mechanism according to claim 1, characterized in that: The portion of the pull rod (6) located outside the valve body (1) is provided with a first through hole (62), a pull ring (7) is installed in the first through hole (62), and the first through hole (62) and the pull ring (7) constitute a positioning mechanism to limit the downward movement distance of the pull rod (6).

7. A suspended safety valve and pressure relief valve mechanism according to claim 6, characterized in that: A plastic package (10) is also installed in the first through hole (62).

8. The suspended safety valve and pressure relief valve mechanism according to claim 1, characterized in that: A first groove (22) is provided inside the valve flap (2), and a sealing gasket (8) is installed in the first groove (22); a clamping platform (221) having a smaller inner diameter than the first groove (22) is provided at the head of the first groove (22); the outer diameter of the sealing gasket (8) is greater than the inner diameter of the clamping platform (221), and the sealing gasket (8) and the first groove (22) are installed in an interference fit.

9. The suspended safety valve and pressure relief valve mechanism according to claim 1, characterized in that: A first groove (22) is provided inside the valve flap (2), and a sealing gasket (8) is installed in the first groove (22); the sealing gasket (8) is directly adhered to the first groove (22) through a vulcanization process.

10. The suspended safety valve and pressure relief valve mechanism according to claim 1, characterized in that: The valve body (1) is divided into an air intake cavity (15) and an air exhaust cavity (16) by the valve disc (2) and the valve seat (13) at a sealed portion. The air intake cavity (15) is located below the valve seat (13) and communicates with the air intake hole (11). The air exhaust cavity (16) is located above the valve seat (13). An air exhaust hole (12) is provided on the valve body (1), and the air exhaust hole (12) communicates with the air exhaust cavity (16) of the valve body (1).

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