Safety valve

Abstract

The utility model relates to the technical field of valves, and discloses a safety valve. The safety valve comprises a valve body, an outer leakage body installed on the valve body and an outer leakage assembly arranged in the outer leakage body, a first through hole communicated with the interior of the outer leakage body is formed in the side wall of the valve body, the outer leakage assembly comprises a pressure relief piece, an elastic piece, a gasket and a sealing cover, and the sealing cover is fixedly connected to one end of the outer leakage body and can push the gasket to move in the axial direction of the sealing cover. One end of the pressure relief piece sequentially penetrates through the gasket and the sealing cover, the other end of the pressure relief piece elastically abuts against the valve body to open or close the first through hole, and the elastic piece is arranged between the outer portion of the pressure relief piece and the gasket in a sleeving mode. According to the safety valve, the sealing cover pushes the gasket to move in the axial direction to compress the elastic piece, so that the rated pressure of the elastic piece is adjusted, the gasket cannot rotate relative to the elastic piece, torsional force directly acting on the elastic piece is reduced, uneven stress caused by the fact that the elastic piece is in a torsional state is avoided, and the yield of products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a safety valve. Background Art

[0002] The safety valve is an important safety protection component of the water heater. Its main working principle is that it is a protective device that can automatically release pressure to the outside when the pressure of tap water or water in the water heater tank is higher than the rated water pressure set by the water heater.

[0003] The existing safety valve mainly includes a valve body and an external leakage body connected to the valve body. The external leakage body is provided with an external leakage elastic part and a pressure regulating cap pressed against one end of the elastic part, and the pressure regulating cap is threadedly connected to the external leakage body. During assembly, the elastic part is compressed mainly by screwing the pressure regulating cap, thereby adjusting the preload value of the elastic part, so as to achieve normal pressure relief of the safety valve. However, in the process of screwing the pressure regulating cap clockwise or counterclockwise, the pressure regulating cap always exerts a torsional force on the elastic part. After the pressure adjustment is completed, the elastic part is in a torsion state, resulting in uneven force on the elastic part and a low yield rate of the product.

[0004] Therefore, there is an urgent need to provide a safety valve to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a safety valve, which can solve the technical problem of low product yield in the prior art.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A safety valve comprises a valve body, an external leakage body mounted on the valve body and an external leakage component arranged in the external leakage body, a first through hole communicating with the interior of the external leakage body is provided on the side wall of the valve body, the external leakage component comprises a pressure relief piece, an elastic piece, a gasket and a sealing cover, the sealing cover is fixedly connected to one end of the external leakage body and can push the gasket to move along its axial direction, one end of the pressure relief piece is penetrated by the gasket and the sealing cover in sequence, the other end of the pressure relief piece elastically abuts against the valve body to open or close the first through hole, and the elastic piece is sleeved between the outside of the pressure relief piece and the gasket.

[0008] As an optional solution, the surface of the gasket is set to be smooth.

[0009] As an optional solution, the gasket is made of hard plastic material.

[0010] As an optional solution, a step surface is formed on the inner side wall of the leakage body, and the side of the gasket away from the sealing cover abuts against the step surface.

[0011] As an optional solution, a hexagonal hole is provided on an end surface of the sealing cover away from the gasket.

[0012] As an optional solution, the outer wall of the valve body is provided with a mounting platform, the mounting platform is provided with an assembly boss, the first through hole passes through the mounting platform and the assembly boss, the leakage body is installed on the mounting platform, and is sleeved and connected to the outer side of the assembly boss.

[0013] As an optional solution, a sealing boss is protruding from the assembly boss, and the sealing boss is arranged at the circumferential outer edge of the first through hole, and one end of the pressure relief member can elastically abut against the sealing boss.

[0014] As an optional scheme, the pressure relief part includes a pull rod, a sealing seat and a sealing gasket, one end of the pull rod is limitedly connected to the sealing seat, the other end of the pull rod is sequentially passed through the gasket and the sealing cover and extends out of the external pressure relief body, the elastic part is sleeved outside the pull rod, one end of the elastic part abuts against the sealing seat, and the other end abuts against the gasket, a sealing groove is provided on the side of the sealing seat close to the first through hole, the sealing gasket is embedded in the sealing groove and can seal the first through hole.

[0015] As an optional solution, a boss structure is provided on the inner side of the sealing seat, one end of the pull rod is a block structure that cooperates with the boss structure, and the block structure penetrates the sealing seat and is limited by the boss structure.

[0016] As an optional solution, the safety valve also includes a switch assembly, one end of the pressure relief member is passed through the gasket and the sealing cover in sequence and then extends out of the external leakage body, the switch assembly is connected to the end of the pressure relief member extending out of the external leakage body, and the switch assembly is configured to drive the pressure relief member to move along its axial direction so that the pressure relief member opens or closes the first through hole.

[0017] The beneficial effects of the utility model are:

[0018] The safety valve provided by the utility model has no threaded connection relationship between the gasket and the leakage body. During assembly, the gasket is directly slid into the leakage body so that the gasket directly compresses the elastic part, and then the sealing cover is connected with the leakage body so that the sealing cover continuously pushes the gasket to move along its axial direction to compress the elastic part until the gasket compresses the elastic part to a certain height to meet the rated pressure. The sealing cover is fixedly connected with the leakage body, thereby restricting the gasket in the leakage body. It can be seen that the safety valve compresses the elastic part by the sealing cover pushing the gasket to move along its axial direction to adjust the rated pressure of the elastic part. The gasket will not rotate relative to the elastic part, reducing the torsional force directly acting on the elastic part, avoiding uneven force on the elastic part, and thus improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to explain the embodiments of the utility model or the technical solutions in the prior art more clearly and easily, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. The drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a safety valve provided by an embodiment of the utility model;

[0021] Figure 2 It is a cross-sectional view of a safety valve provided by an embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the sealing cover provided by an embodiment of the utility model;

[0023] Figure 4 It is a cross-sectional view of the safety valve provided by an embodiment of the utility model with the valve body and the internal leakage component hidden.

[0024] In the figure:

[0025] 10. valve body; 11. first through hole; 12. mounting platform; 13. assembly boss; 14. sealing boss; 15. liquid inlet; 16. liquid outlet;

[0026] 20. leakage body; 21. second through hole; 22. step surface;

[0027] 30. Diversion nozzle;

[0028] 40. leakage assembly; 41. pressure relief member; 411. sealing seat; 4111. sealing groove; 4112. boss structure; 412. pull rod; 4121. convex block structure; 4122. through hole; 413. sealing pad; 42. elastic member; 43. gasket; 44. sealing cover; 441. hexagon socket hole; 45. first sealing ring; 46. second sealing ring;

[0029] 50. Switch assembly; 51. Handle; 52. Connecting shaft. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] This embodiment provides a safety valve, which is an important safety protection component of the water heater. Its main working principle is that it is a protection device that can automatically release pressure to the outside when the pressure of tap water or water in the water heater tank is higher than the rated water pressure set by the water heater.

[0035] like Figure 1 and Figure 2 As shown, the safety valve includes a valve body 10, an external leakage body 20 mounted on the valve body 10, and an external leakage component 40 arranged in the external leakage body 20. The valve body 10 is a cylindrical structure with two ends of the valve body 10 extending therethrough. One end of the valve body 10 is a liquid inlet 15, and the other end is a liquid outlet 16. The axis of the external leakage body 20 is arranged perpendicular to the axis of the valve body 10. The side wall of the valve body 10 is provided with a first through hole 11 communicating with the inside of the external leakage body 20. The safety valve also includes an internal leakage component (not shown), which is installed in the valve body 10. It should be noted that the specific structure of the internal leakage component is a conventional structure and will not be repeated here.

[0036] Specifically, Figure 2 As shown, the leakage assembly 40 includes a pressure relief member 41, an elastic member 42, a gasket 43 and a sealing cover 44. The gasket 43 is slidably arranged in the leakage body 20, that is, the gasket 43 and the inner cavity of the leakage body 20 are slidably matched, not threadedly matched. The sealing cover 44 is fixedly connected to the end of the leakage body 20 away from the valve body 10 and can push the gasket 43 to move along its axial direction. One end of the pressure relief member 41 is successively penetrated by the gasket 43 and the sealing cover 44 and extends out of the leakage body 20. The other end of the pressure relief member 41 elastically abuts on the valve body 10 to open or close the first through hole 11. The elastic member 42 is sleeved between the outside of the pressure relief member 41 and the gasket 43. Among them, the elastic member 42 is a spring, which is sleeved on the outside of the pressure relief member 41, and one end of the spring abuts on the pressure relief member 41, and the other end of the spring abuts on the gasket 43.

[0037] During assembly, first extend one end of the assembled pressure relief member 41 into the leakage body 20 to seal the first through hole 11, then put the spring on the outside of the pressure relief member 41, one end of the spring abuts against the pressure relief member 41 to limit one end, then directly put the gasket 43 into the leakage body 20, so that the gasket 43 directly compresses the elastic member 42, and then the sealing cover 44 is matched and connected with the leakage body 20, so that the sealing cover 44 abuts against the gasket 43, and the gasket 43 is continuously pushed to compress the elastic member 42 through the installation of the sealing cover 44 until the gasket 43 compresses the elastic member 42 to a certain height to meet the rated pressure, and the sealing cover 44 is fixedly connected to the leakage body 20, thereby limiting the gasket 43 in the leakage body 20. Since there is no threaded connection between the gasket 43 and the leakage body 20, the safety valve directly compresses the spring by pushing the gasket 43 along its axial direction through the sealing cover 44, thereby adjusting the rated pressure of the spring. The gasket 43 will not rotate relative to the spring, reducing the torsional force directly acting on the spring, avoiding the spring being in a torsion state and causing uneven force, thereby improving the product yield.

[0038] In an optional embodiment, the sealing cover 44 and the leakage body 20 are fixed together by threaded connection. Figure 2 and Figure 3 The outer surface of the sealing cover 44 is also provided with an external thread, and the inner side of the leakage body 20 is provided with an internal thread. The external thread and the internal thread cooperate to fix the sealing cover 44 and the leakage body 20. After the sealing cover 44 is matched and connected with the leakage body 20, the sealing cover 44 and the gasket 43 are generated with sliding friction by screwing the sealing cover 44. As the screwing depth increases, the sealing cover 44 continuously pushes the gasket 43 to move along its axial direction, so that the gasket 43 directly compresses the spring until the gasket 43 compresses the spring to a certain height to meet the rated pressure. The sealing cover 44 is threadedly connected with the leakage body 20, thereby limiting the gasket 43 in the leakage body 20, and the operation is convenient and quick.

[0039] In another optional embodiment, the connection between the sealing cover 44 and the leakage body 20 may also be a snap-on connection or the like, as long as the gasket 43 can be restricted within the leakage body 20 .

[0040] In an optional embodiment, the surface of the gasket 43 is smooth. This arrangement can reduce the torsional force acting on the gasket 43 during the screwing process of the sealing cover 44, prevent the gasket 43 from twisting, and thus prevent the torsional force of the gasket 43 from acting on the spring and causing the spring to be in a twisted state, thereby improving the yield rate of the product.

[0041] In an optional embodiment, the gasket 43 is made of a hard and smooth plastic material. This arrangement can reduce production costs while ensuring that the surface of the gasket 43 is smooth, while ensuring the structural strength of the gasket 43.

[0042] It is understandable that in the prior art, the leakage spring is compressed mainly by screwing the pressure regulating cap, thereby adjusting the preload force value of the spring, so as to achieve normal pressure relief of the safety valve. However, when the elastic coefficient of the spring is large, the force value of the spring per unit length fluctuates greatly, and it is difficult to adjust the rated pressure of the spring to the required precise pressure by screwing the pressure regulating cap. The position of the pressure regulating cap needs to be constantly fine-tuned, which reduces the assembly efficiency and the consistency of the same batch of products is poor, which is not conducive to mass production of products.

[0043] In order to solve the above problem, in this embodiment, Figure 4 As shown, a step surface 22 is formed on the inner side wall of the leakage body 20, and the side of the gasket 43 away from the sealing cover 44 abuts against the step surface 22. In this way, when the gasket 43 abuts against the step surface 22 during the process of screwing the sealing cover 44 to push the gasket 43 to compress the spring, it means that the compression height of the spring meets the rated pressure, and there is no need to repeatedly fine-tune the position of the gasket 43, and the rated pressure can be achieved after the assembly is completed, eliminating the pressure adjustment process, improving the assembly efficiency of the product, and reducing the manufacturing cost. In addition, for the same batch of products, if the products meet the tolerance, the rated pressure fluctuation after assembly is small, and the consistency of the products is easier to ensure.

[0044] In an optional embodiment, if Figure 4 As shown, a first sealing ring 45 is provided between the contact surface of the sealing cover 44 and the external leakage body 20, and a second sealing ring 46 is provided between the sealing cover 44 and the pull rod 412 of the pressure relief member 41. The above arrangement can achieve a good sealing effect and prevent liquid leakage during the pressure relief process.

[0045] In an optional embodiment, if Figure 3As shown, a hexagonal hole 441 is provided on the end surface of the sealing cover 44 away from the gasket 43. By providing the hexagonal hole 441 on the outer end surface of the sealing cover 44, it is convenient to insert the operating tool, thereby conveniently screwing the sealing cover 44, conveniently applying force, and achieving the purpose of labor saving. In addition, the hexagonal hole 441 has higher adaptability than inner holes of other shapes.

[0046] like Figure 1 and Figure 2 As shown, the safety valve also includes a flow guide nozzle 30, and a second through hole 21 is provided on the side wall of the leakage body 20. One end of the flow guide nozzle 30 is inserted into the second through hole 21, and the side walls of the two are tightly fitted and welded and fixed, so that the connection between the flow guide nozzle 30 and the leakage body 20 is more stable. When the pressure is released, the pressure relief member 41 opens the first through hole 11, and the fluid entering from the liquid inlet 15 of the valve body 10 passes through the internal leakage component and then enters the leakage body 20 from the first through hole 11, and then passes through the external leakage component 40 and flows out from the flow guide nozzle 30.

[0047] like Figure 4 As shown, the pressure relief member 41 specifically includes a pull rod 412, a sealing seat 411 and a sealing gasket 413. One end of the pull rod 412 is limitedly connected to the sealing seat 411, and the other end of the pull rod 412 is successively penetrated by a gasket 43 and a sealing cover 44 and extends out of the leakage body 20. The elastic member 42 is sleeved on the outside of the pull rod 412, one end of the elastic member 42 abuts against the sealing seat 411, and the other end abuts against the gasket 43. The sealing seat 411 and the gasket 43 jointly limit the elastic member 42. A sealing groove 4111 is provided on the side of the sealing seat 411 close to the first through hole 11, and the sealing gasket 413 is embedded in the sealing groove 4111 and can seal the first through hole 11. When the pressure in the fluid medium is too high or the pressure of the electric water heater is too high after heating, the sealing gasket 413 is forced to push the sealing seat 411 to move rightward and compress the elastic member 42, so that the pressure relief member 41 overcomes the elastic force of the elastic member 42 to open the first through hole 11. At this time, the fluid entering from the liquid inlet 15 of the valve body 10 passes through the internal leakage component and then enters the external leakage body 20 from the first through hole 11, and then passes through the external leakage component 40 and flows out from the guide nozzle 30. When it is necessary to manually release the pressure in the water heater, the pull rod 412 can be manually pulled outward to drive the sealing seat 411 and the sealing gasket 413 to open the first through hole 11. At this time, the fluid entering from the liquid inlet 15 of the valve body 10 passes through the internal leakage component and then enters the external leakage body 20 from the first through hole 11, and then passes through the external leakage component 40 and flows out from the guide nozzle 30.

[0048] In an optional embodiment, if Figure 4As shown, a boss structure 4112 is provided on the inner side of the sealing seat 411, and one end of the pull rod 412 is a bump structure 4121 that cooperates with the boss structure 4112. The bump structure 4121 is inserted into the sealing seat 411 and limited by the boss structure 4112. Through the above arrangement, the sealing seat 411 and the pull rod 412 can be connected in a limited position, and when the pull rod 412 moves in a direction away from the sealing gasket 413, the sealing seat 411 can be driven to move synchronously.

[0049] In an optional embodiment, if Figure 4 As shown, the safety valve further includes a switch assembly 50, which is connected to one end of the pressure relief member 41 extending from the external leakage body 20, that is, connected to the pull rod 412, and the switch assembly 50 is configured to drive the pressure relief member 41 to move along its axial direction, so that the pressure relief member 41 opens or closes the first through hole 11. During manual pressure relief, the operator manually pulls the switch assembly 50 to open the pressure relief member 41, so that the fluid enters the external leakage body 20 and flows out from the guide nozzle 30, thereby achieving the purpose of labor saving.

[0050] In an optional embodiment, if Figure 4 As shown, the switch assembly 50 includes a handle 51 and a connecting shaft 52. The protruding end of the pull rod 412 is provided with a through hole 4122. The through hole 4122 extends along the axial direction of the pull rod 412. In this embodiment, the through hole 4122 is a waist-shaped hole. The connecting shaft 52 is penetrated in the through hole 4122 and can move along the extension direction of the through hole 4122. One end of the handle 51 is connected to the connecting shaft 52. By rotating the handle 51, one end of the handle 51 provided with the connecting shaft 52 is abutted against the sealing cover 44, thereby driving the connecting shaft 52 to move along the extension direction of the through hole 4122, so that the pull rod 412 drives the sealing seat 411 and the sealing gasket 413 to move forward and backward along its axial direction, so that the pressure relief member 41 opens or closes the first through hole 11.

[0051] When in use, when the installation valve is applied to an electric water heater, the fluid medium in the external pipeline enters the safety valve from the liquid inlet 15 of the valve body 10, the internal leakage component is compressed and opened, and the fluid medium (such as water flow) enters the electric water heater through the liquid outlet 16 of the valve body 10. When the pressure in the fluid medium is too high or the pressure of the electric water heater is too high after heating, the seal is forced to push the sealing seat 411 to compress the elastic member 42, so that the pressure relief member 41 opens the first through hole 11, and the fluid medium flows through the external leakage body 20 and flows out through the guide nozzle 30. When the pressure in the water heater needs to be manually released, the switch assembly 50 can be manually opened to make the pressure relief member 41 open the first through hole 11, and the fluid medium flows through the external leakage body 20 and flows out through the guide nozzle 30.

[0052] In an optional embodiment, if Figure 2As shown, the outer wall of the valve body 10 is provided with a mounting platform 12, and an assembly boss 13 is convexly provided on the mounting platform 12. The first through hole 11 penetrates the mounting platform 12 and the assembly boss 13, and the leakage body 20 is mounted on the mounting platform 12 and sleeved and connected to the outer side of the assembly boss 13. The inner wall of the leakage body 20 fits with the outer wall of the assembly boss 13, so that the leakage body 20 can be stably mounted on the outer side of the assembly boss 13, thereby improving the installation accuracy of the leakage body 20. In this embodiment, the leakage body 20 is welded to the valve body 10, and the connection is relatively firm. The mounting platform 12 of the mounting valve is a planar structure, so that the connection between the leakage body 20 and the mounting platform 12 and the assembly boss 13 is relatively consistent. During welding, the welding liquid penetrates evenly, ensuring the connection strength of the safety valve.

[0053] In an optional embodiment, if Figure 2 As shown, a sealing boss 14 is convexly provided on the assembly boss 13, and the sealing boss 14 is arranged at the circumferential outer edge of the first through hole 11, and one end of the pressure relief member 41 can elastically abut against the sealing boss 14, specifically, the sealing gasket 413 elastically abuts against the sealing boss 14. The arrangement of the sealing boss 14 facilitates the sealing of the first through hole 11 by the sealing gasket 413, thereby improving the sealing effect.

[0054] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. Safety valve, characterized in that, The invention comprises a valve body (10), an external leakage body (20) mounted on the valve body (10), and an external leakage component (40) arranged in the external leakage body (20); a first through hole (11) communicating with the interior of the external leakage body (20) is arranged on the side wall of the valve body (10); the external leakage component (40) comprises a pressure relief member (41), an elastic member (42), a gasket (43) and a sealing cover (44); the sealing cover (44) is fixedly connected to one end of the external leakage body (20) and can push the gasket (43) to move along its axial direction; one end of the pressure relief member (41) is penetrated by the gasket (43) and the sealing cover (44) in sequence; the other end of the pressure relief member (41) elastically abuts against the valve body (10) to open or close the first through hole (11); the elastic member (42) is sleeved between the outside of the pressure relief member (41) and the gasket (43).

2. The safety valve according to claim 1, characterized in that: The surface of the gasket (43) is arranged to be smooth.

3. The safety valve according to claim 2, characterized in that: The gasket (43) is made of hard plastic material.

4. The safety valve according to claim 1, characterized in that: A step surface (22) is formed on the inner side wall of the leakage body (20), and the side of the gasket (43) away from the sealing cover (44) abuts against the step surface (22).

5. The safety valve according to claim 1, characterized in that: A hexagonal hole (441) is provided on an end surface of the sealing cover (44) which is away from the gasket (43).

6. The safety valve according to any one of claims 1 to 5, characterized in that: The outer wall of the valve body (10) is provided with a mounting platform (12), and an assembly boss (13) is protruding from the mounting platform (12). The first through hole (11) passes through the mounting platform (12) and the assembly boss (13). The leakage body (20) is installed on the mounting platform (12) and is sleeved and connected to the outer side of the assembly boss (13).

7. The safety valve according to claim 6, characterized in that: A sealing boss (14) is protruding from the assembly boss (13), and the sealing boss (14) is arranged at the circumferential outer edge of the first through hole (11), and one end of the pressure relief member (41) can elastically abut against the sealing boss (14).

8. The safety valve according to any one of claims 1 to 5, characterized in that: The pressure relief component (41) comprises a pull rod (412), a sealing seat (411) and a sealing gasket (413); one end of the pull rod (412) is limitedly connected to the sealing seat (411); the other end of the pull rod (412) is successively penetrated by the gasket (43) and the sealing cover (44) and extends out of the external leakage body (20); the elastic component (42) is sleeved on the outside of the pull rod (412); one end of the elastic component (42) abuts against the sealing seat (411), and the other end abuts against the gasket (43); a sealing groove (4111) is provided on one side of the sealing seat (411) close to the first through hole (11); the sealing gasket (413) is embedded in the sealing groove (4111) and can seal the first through hole (11).

9. The safety valve according to claim 8, characterized in that: A boss structure (4112) is provided on the inner side of the sealing seat (411), one end of the pull rod (412) is a block structure (4121) that cooperates with the boss structure (4112), and the block structure (4121) is inserted into the sealing seat (411) and is limited by the boss structure (4112).

10. The safety valve according to any one of claims 1 to 5, characterized in that: The safety valve further comprises a switch assembly (50), one end of the pressure relief member (41) passes through the gasket (43) and the sealing cover (44) in sequence and then extends out of the external leakage body (20), the switch assembly (50) is connected to the end of the pressure relief member (41) extending out of the external leakage body (20), and the switch assembly (50) is configured to be able to drive the pressure relief member (41) to move along its axial direction so that the pressure relief member (41) opens or closes the first through hole (11).

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