Spring type safety valve

Abstract

The invention discloses a spring type safety valve, and relates to the technical field of spring type safety valves, the spring type safety valve comprises a valve body and a valve seat, and further comprises a speed reduction mechanism which is arranged on a guide pipe and used for reducing the speed of the tail end of the sealing stroke of a valve element, and the speed reduction mechanism comprises a speed reduction plate slidably connected into the guide pipe; the speed reduction plate is connected with the side wall, located in the guide pipe, of the adjusting rod, the side wall of the guide pipe is fixedly connected with a U-shaped pipe, the two ends of the U-shaped pipe communicate with the guide pipe, the two ends of the U-shaped pipe are located on the two sides of the speed reduction plate correspondingly, and the U-shaped pipe is provided with a control assembly used for controlling the gas circulation rate. According to the spring type safety valve, through the arrangement of the speed reduction mechanism, the abutting speed of the valve element and the valve seat at the sealed tail end of the valve element and the valve seat is reduced through the flowing resistance of gas while the valve element is not affected to release the system pressure under the rated pressure, and therefore the impact force generated when the valve element abuts against the valve seat is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spring safety valve, in particular to a spring safety valve. BACKGROUND

[0002] The spring safety valve mainly relies on the elastic force of the spring to balance the pressure in the system. When the system pressure rises above the set opening pressure of the safety valve, the force generated by the medium pressure overcomes the elastic force of the spring, so that the valve core opens, the medium is discharged through the safety valve, thereby reducing the system pressure, when the system pressure drops to the spring force can rebalance the medium pressure, the valve core is closed, and the medium discharge is stopped.

[0003] During use of the spring safety valve, when the internal pressure of the system decreases, the spring will push the valve core against the valve seat, and then the sealing between the valve core and the valve seat is used to stop the discharge of the medium. However, under the elastic pushing force of the spring, the valve core is easily damaged due to excessive compression of the spring, which causes excessive pushing force of the valve core, and then causes damage to the valve core or the valve seat due to excessive impact force when the valve core and the valve seat are in contact, thereby affecting the sealing between the valve core and the valve seat, and further reducing the service life of the spring safety valve. SUMMARY

[0004] The purpose of the present application is to provide a spring safety valve to solve the problems in the background art.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a spring safety valve, comprising a valve body and a valve seat, the valve body is provided with a valve cover on the side away from the valve seat, the valve body is provided with a valve core inside, the valve cover is fixedly connected with a guide pipe on the inner wall of the side close to the valve core, the guide pipe is slidably connected with an adjusting rod, one end of the adjusting rod is connected with the valve core, the adjusting rod is sleeved with an extrusion spring for extruding the valve core on the inner side wall of the valve cover, the valve seat is provided with a sealing hole on the side close to the valve core, the sealing hole is matched with the valve core, the side wall of the valve core is fixedly connected with a sealing baffle, and a speed reduction mechanism is further arranged in the guide pipe for reducing the speed of the end of the sealing stroke of the valve core. The speed reduction mechanism comprises a speed reduction plate slidably connected in the guide pipe, the speed reduction plate is connected with the adjusting rod on the inner side wall of the guide pipe, the side wall of the guide pipe is fixedly connected with a U-shaped pipe, the two ends of the U-shaped pipe are in communication with the guide pipe, and the two ends are located on the two sides of the speed reduction plate respectively, and the U-shaped pipe is provided with a control assembly for controlling the flow rate of the gas.

[0006] Preferably, the control assembly includes a first control plate fixedly connected to the inner wall of the U-shaped tube, the first control plate having a plurality of first control holes, a second control plate rotatably connected to the side of the first control plate away from the guide tube, the second control plate having a plurality of second control holes, each of the second control holes being matched with the first control holes, and the U-shaped tube having a rotating assembly for driving the second control plate to rotate.

[0007] Preferably, the rotating assembly includes an annular rotating groove formed on the inner wall of the U-shaped tube, a gear ring rotatably connected to the annular rotating groove, the inner wall of the gear ring being connected to the second control plate, and the thickness of the gear ring being less than that of the second control plate. Two first fixing plates symmetrically arranged are fixedly connected to the side wall of the U-shaped tube, and a sector gear is connected between the two first fixing plates through a rotating rod.

[0008] Preferably, the U-shaped tube has a clearance hole on its side wall, the sector gear is rotatably connected to the clearance hole and meshes with the gear ring, and the valve core is provided with a one-way component for rotating the sector gear in one direction.

[0009] Preferably, the one-way component includes a second fixing plate fixedly connected to the valve core near the U-shaped tube. The side of the second fixing plate near the U-shaped tube is connected to a sliding plate via a retraction assembly. The side of the sliding plate away from the retraction assembly is fixedly connected to a plurality of meshing plates. Each of the meshing plates has an inclined surface on the side away from the valve core. The sidewall of the sector gear is fixedly connected to a plurality of meshing blocks, and each of the meshing blocks is matched with a meshing plate.

[0010] Preferably, the retraction assembly includes a retraction hole formed on the side of the second fixed plate near the sliding plate, the sliding plate being slidably connected to the retraction hole, a retraction tube being fixedly connected to the bottom wall of the retraction hole, two retraction tubes being slidably connected to retraction rods, one end of the two retraction rods being connected to the sliding plate, and a first spring being sleeved on the side wall of the two retraction tubes, with both ends of the two first springs being respectively connected to the sliding plate and the bottom wall of the retraction hole.

[0011] Preferably, one of the two first fixed plates is provided with a return force assembly for returning the rotating rod. The return force assembly includes a return plate disposed at the end of the rotating rod away from the first fixed plate. A torsion spring is sleeved on the side wall of the rotating rod between the return plate and the first fixed plate. The two ends of the torsion spring are respectively connected to the return plate and the first fixed plate.

[0012] Preferably, the valve core is provided with a cleaning assembly for cleaning the inner wall of the sealing hole. The cleaning assembly includes an annular cavity opened in the valve core. The bottom wall of the annular cavity near the valve seat has a plurality of cleaning holes. Each cleaning hole penetrates the valve core, and the outlet end of each cleaning hole is inclined outward. A flexible tube is connected to the side wall of the U-shaped tube. One end of the flexible tube is connected to the valve core and communicates with the inside of the annular cavity.

[0013] Preferably, an air inlet pipe is fixedly connected to the side wall of the guide tube, and the air inlet pipe is concentrically arranged with the first control board.

[0014] Preferably, the intake pipe is provided with a one-way valve, and the one-way valve is directed from the outside to the inside of the guide pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) This type of spring-loaded safety valve, through the setting of the speed reduction mechanism, under the cooperation of the control component, the rotating component and the one-way component, without affecting the valve core to release the system pressure under the rated pressure, at the sealing end of the valve core and the valve seat, the flow resistance of the gas is used to reduce the contact speed between the valve core and the valve seat at the sealing end, thereby reducing the impact force when the valve core and the valve seat contact each other, and further reducing the impact damage when the valve core or the valve seat seals, thus ensuring the sealing performance between the valve core and the valve seat while improving the long-term service life of the spring-loaded safety valve.

[0016] (2) This type of spring-loaded safety valve, through the setting of the cleaning component, utilizes the gas flow generated during the downward movement of the valve core to clean the sealing hole, thereby reducing the impact of impurities adhering to the inner wall of the sealing hole on the connection and sealing performance between the valve core and the valve seat. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the valve body in this invention; Figure 3 This is a schematic diagram of the valve seat structure in this invention; Figure 4 This is a schematic diagram of the internal structure of the deceleration component and the control component in this invention; Figure 5 This is a schematic diagram of the rotating assembly in this invention; Figure 6 This is a cross-sectional view of the unidirectional component and the telescopic component in this invention; Figure 7 for Figure 6 Enlarged structural diagram at point A; Figure 8 This is a schematic diagram of the pullback assembly in this invention; Figure 9 This is a schematic diagram of the internal structure of the cleaning component in this invention.

[0018] In the diagram: 101. Valve body; 102. Valve seat; 103. Valve cover; 104. Valve core; 105. Guide tube; 106. Adjusting rod; 107. Compression spring; 108. Sealing hole; 109. Sealing retaining ring; 2. Speed ​​reduction mechanism; 201. Speed ​​reduction plate; 202. U-tube; 3. Control assembly; 301. First control plate; 302. Second control plate; 303. Second control hole; 4. Rotating assembly; 401. Annular rotating groove; 402. Gear ring; 403. First fixing plate; 404. 1. Rotating rod; 405. Sector gear; 406. Clearance hole; 5. One-way assembly; 501. Second fixing plate; 502. Sliding plate; 503. Meshing plate; 504. Meshing block; 506. Inclined surface; 6. Retraction assembly; 601. Retraction tube; 602. Retraction rod; 603. First spring; 7. Return assembly; 701. Return plate; 702. Torsion spring; 9. Cleaning assembly; 901. Annular cavity; 902. Cleaning hole; 903. Hose; 10. Air inlet pipe; 11. One-way valve. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-9 The present invention provides a technical solution: a spring-loaded safety valve, including a valve body 101 and a valve seat 102. A valve cover 103 is provided on the side of the valve body 101 away from the valve seat 102. A valve core 104 is provided inside the valve body 101. A guide tube 105 is fixedly connected to the inner wall of the valve cover 103 near the valve core 104. An adjusting rod 106 is slidably connected to the guide tube 105. One end of the adjusting rod 106 is connected to the valve core 104. A compression spring 107 for compressing the valve core 104 is sleeved on the inner side wall of the adjusting rod 106 located inside the valve cover 103. A sealing hole 108 is opened on the side of the valve seat 102 near the valve core 104. The sealing hole 108 is matched with the valve core 104. A sealing retaining ring 109 is fixedly connected to the side wall of the valve core 104. The valve also includes a deceleration mechanism 2 provided in the guide tube 105 for decelerating the valve core 104 at the end of its sealing stroke. The speed reduction mechanism 2 includes a speed reduction plate 201 slidably connected inside the guide tube 105. The speed reduction plate 201 and the adjusting rod 106 are connected to the inner side wall of the guide tube 105. A U-shaped tube 202 is fixedly connected to the side wall of the guide tube 105. Both ends of the U-shaped tube 202 are connected to the guide tube 105 and are respectively located on both sides of the speed reduction plate 201. The U-shaped tube 202 is provided with a control component 3 for controlling the gas flow rate. It should be noted that, through the setting of the speed reduction mechanism 2, under the combined action of the control component 3, the rotation component 4 and the one-way component 5, without affecting the release of system pressure by the valve core 104 under the rated pressure, the flow resistance of the gas is used to reduce the contact speed between the valve core 104 and the valve seat 102 at the sealing end, thereby reducing the impact force when the valve core 104 and the valve seat 102 come into contact, and further reducing the impact damage when the valve core 104 or the valve seat 102 seals. Thus, while ensuring the sealing performance between the valve core 104 and the valve seat 102, the service life of the spring-loaded safety valve is improved.

[0021] Please see Figures 3-6 The control component 3 shown in the figure includes a first control plate 301 fixedly connected to the inner wall of the U-shaped tube 202. The first control plate 301 has a plurality of first control holes. A second control plate 302 is rotatably connected to the side of the first control plate 301 away from the guide tube 105. The second control plate 302 has a plurality of second control holes 303. Each second control hole 303 is matched with the first control hole. The U-shaped tube 202 is provided with a rotating component 4 for driving the second control plate 302 to rotate. It should be noted here that: by setting the control component 3, when the valve core 104 and the valve seat 102 are connected to the sealing end, the second control hole 303 on the second control plate 302 is offset from the first control hole on the first control plate 301, thereby reducing the diameter of the gas flow hole in the U-shaped tube 202, which in turn increases the flow resistance of the gas, thereby reducing the sliding speed of the deceleration plate 201 in the guide tube 105, and consequently reducing the contact speed between the valve core 104 and the valve seat 102 at the sealing end, thereby reducing the impact force when the valve core 104 and the valve seat 102 contact, and thus reducing the impact damage when the valve core 104 or the valve seat 102 are sealed.

[0022] Please see Figure 5 , Figure 6 and Figure 7The rotating component 4 shown in the figure includes an annular rotating groove 401 formed on the inner wall of the U-shaped tube 202. The annular rotating groove 401 is rotatably connected to a gear ring 402. The inner wall of the gear ring 402 is connected to the second control plate 302, and the thickness of the gear ring 402 is less than that of the second control plate 302. Two first fixing plates 403 are fixedly connected to the side wall of the U-shaped tube 202. A sector gear 405 is connected between the two first fixing plates 403 through a rotating rod 404. It should be noted here that the rotating component 4 is used to drive the second control plate 302 to rotate when the valve core 104 and the valve seat 102 are sealed at the end.

[0023] Please see Figure 6 and Figure 7 The U-shaped tube 202 in the figure has a clearance hole 406 on its side wall. The sector gear 405 is rotatably connected to the clearance hole 406 and meshes with the gear ring 402. The valve core 104 is provided with a one-way component 5 for rotating the sector gear 405 in one direction. It should be noted that the clearance hole 406 is designed to allow the sector gear 405 to mesh with the gear ring 402, while also maintaining the sealing of the connection between the second control plate 302 and the U-shaped tube 202.

[0024] Please see Figure 6 and Figure 7 The one-way component 5 shown in the figure includes a second fixing plate 501 fixedly connected to the valve core 104 near the U-shaped tube 202. The side of the second fixing plate 501 near the U-shaped tube 202 is connected to a sliding plate 502 via a retraction component 6. The side of the sliding plate 502 away from the retraction component 6 is fixedly connected to a plurality of meshing plates 503. Each meshing plate 503 has an inclined surface 506 on the side away from the valve core 104. The side wall of the sector gear 405 is fixedly connected to a plurality of meshing blocks 504. Each meshing block 504 is matched with the meshing plate 503. It should be noted here that the one-way component 5 is designed to prevent the second control plate 302 from rotating as the valve core 104 moves away from the valve seat 102, thereby ensuring that the valve core 104 releases system pressure under rated pressure.

[0025] Please see Figure 6 and Figure 7 The retraction assembly 6 shown in the figure includes a retraction hole opened on the side of the second fixed plate 501 near the sliding plate 502. The sliding plate 502 is slidably connected to the retraction hole. A retraction tube 601 is fixedly connected to the bottom wall of the retraction hole. Retraction rods 602 are slidably connected to the two retraction tubes 601. One end of the two retraction rods 602 is connected to the sliding plate 502. A first spring 603 is sleeved on the side wall of the two retraction tubes 601. The two ends of the two first springs 603 are respectively connected to the sliding plate 502 and the bottom wall of the retraction hole. It should be noted here that the retraction component 6 is used to guide and reset the movement of each meshing plate 503.

[0026] Please see Figure 8 One of the two first fixed plates 403 in the figure is provided with a return force assembly 7 for returning the rotating rod 404. The return force assembly 7 includes a return plate 701 disposed at the end of the rotating rod 404 away from the first fixed plate 403. A torsion spring 702 is sleeved on the side wall of the rotating rod 404 between the return plate 701 and the first fixed plate 403. The two ends of the torsion spring 702 are respectively connected to the return plate 701 and the first fixed plate 403. It should be noted here that: with the setting of the return component 7, after the valve core 104 and the valve seat 102 are completely sealed, the meshing plate 503 and the meshing block 504 are disengaged. At this time, under the elastic action of the torsion spring 702, the sector gear 405 will be driven to reset and rotate. Then, under the meshing transmission action of the sector gear 405 and the gear ring 402, the second control plate 302 will be driven to reset and rotate, so that the first control hole and the second control hole 303 are engaged again.

[0027] Please see Figure 9 The valve core 104 shown in the figure is provided with a cleaning assembly 9 for cleaning the inner wall of the sealing hole 108. The cleaning assembly 9 includes an annular cavity 901 opened in the valve core 104. Multiple cleaning holes 902 are opened on the bottom wall of the annular cavity 901 near the valve seat 102. Each cleaning hole 902 penetrates the valve core 104, and the outlet end of each cleaning hole 902 is inclined outward. A flexible hose 903 is connected to the side wall of the U-shaped tube 202. One end of the flexible hose 903 is connected to the valve core 104 and communicates with the inside of the annular cavity 901. It should be noted that by setting up the cleaning component 9, the gas flow generated during the downward movement of the valve core 104 is used to clean the sealing hole 108, thereby reducing the impact of impurities adhering to the inner wall of the sealing hole 108 on the connection and sealing performance between the valve core 104 and the valve seat 102.

[0028] Please see Figure 4 The guide tube 105 in the figure is fixedly connected to the side wall of the air inlet tube 10, and the air inlet tube 10 is concentrically arranged with the first control board 301. It should be noted here that the air inlet pipe 10 is used to supplement the gas flowing out of the cleaning hole 902. At the same time, since the air outlet of each cleaning hole 902 is located at the bottom side wall of the valve core 104, gas flow will only occur when the valve core 104 is completely separated from the valve seat 102, thus ensuring that gas will not flow out from the hose 903.

[0029] Please see Figure 4The air intake pipe 10 shown in the figure is equipped with a one-way valve 11 inside. The conduction direction of the one-way valve 11 is from the outside to the inside of the guide pipe 105. It should be noted that by setting the one-way valve 11 and limiting the direction of conduction, external gas can enter the guide tube 105 to replenish the gas, while the gas in the guide tube 105 can only flow from the hose 903 to the cleaning hole 902.

[0030] Working principle: During use, when the system pressure rises above the set opening pressure of the safety valve, the force generated by the medium pressure overcomes the elastic force of the compression spring 107, causing the valve core 104 to move away from the valve seat 102, thereby allowing the medium to be discharged through the safety valve, thus reducing the system pressure. When the system pressure drops to the point where the compression force of the compression spring 107 can rebalance the medium pressure, the valve core 104 closes, stopping the discharge of the medium, thus achieving the balance of pressure within the system. Furthermore, when the pressure within the system overcomes the elastic force of the compression spring 107 and pushes the valve core 104 away from the valve seat 102, it will simultaneously drive the deceleration plate 201 to slide within the guide tube 105. Under the sliding compression action of the deceleration plate 201, the gas within the guide tube 105 is compressed into the U-shaped tube 202 and flows to the other side of the deceleration plate 201. During the movement of the valve core 104 away from the valve seat 102, it will simultaneously drive the sliding plate 502 on one side of the second fixed plate 501 to move, thereby driving... Each meshing plate 503 moves away from the valve seat 102 synchronously. During the process of each meshing plate 503 moving away from the valve seat 102, when each meshing plate 503 meshes with the meshing block 504, under the interaction of the inclined surface 506 on each meshing plate 503 and the meshing block 504 and the guiding action of the retraction component 6, each meshing plate 503 will be pushed to retract into the retraction hole, so that each meshing plate 503 will not drive the meshing block 504 to rotate during the process of moving away from the valve seat 102. Meanwhile, when the system pressure drops to the point where the squeezing force of the compression spring 107 can rebalance the medium pressure, the valve core 104 will move closer to the valve seat 102 under the elastic pushing force of the compression spring 107. In the initial stage of the movement of the valve core 104, when the valve core 104 moves downward, it drives the second fixed plate 501 to move. At this time, the meshing plate 503 on one side of the second fixed plate 501 has not yet meshed with the meshing block 504. Therefore, the first control hole on the first control plate 301 and the second control hole 303 on the second control plate 302 are still in a completely overlapping state. At this time, the gas in the guide tube 105 will flow smoothly in the U-shaped tube 202. As the valve core 104 continues to move downwards, and a portion of the sidewall of the valve core 104 is inserted into the sealing hole 108 of the valve seat 102, initial sealing of the valve seat 102 is achieved. The second fixing plate 501 will then drive the meshing plates 503 and meshing blocks 504 to mesh, thereby driving the sector gear 405 to rotate. During the rotation of the sector gear 405, the meshing transmission between the sector gear 405 and the gear ring 402 drives the second control plate 302 to rotate, thus causing the second control hole 303 on the second control plate 302 to mesh with the sealing hole 108 on the first control plate 301. The staggered first control holes reduce the diameter of the gas flow holes in the U-shaped tube 202, thereby increasing the flow resistance of the gas and reducing the sliding speed of the speed-reducing plate 201 in the guide tube 105. This, in turn, reduces the contact speed between the valve core 104 and the valve seat 102 at the sealing end, thereby reducing the impact force when the valve core 104 and the valve seat 102 contact each other. This further reduces the impact damage when the valve core 104 or the valve seat 102 seals, thus ensuring the sealing performance between the valve core 104 and the valve seat 102 while improving the long-term service life of the spring-loaded safety valve. Furthermore, during the process of the valve core 104 moving down and sealing with the valve seat 102, the sliding and squeezing of the deceleration plate 201 in the guide tube 105 will cause the gas in the guide tube 105 to flow from the U-shaped tube 202 into the hose 903, and finally from the annular cavity 901 to each cleaning hole 902. The air outlet of each cleaning hole 902 is inclined outward, so the gas flowing out of each cleaning hole 902 can be blown towards the inner wall of the sealing hole 108, thereby cleaning the sealing hole 108 and reducing the impact of impurities adhering to the inner wall of the sealing hole 108 on the connection and sealing between the valve core 104 and the valve seat 102.

Claims

1. Spring-loaded safety valve, including: The valve body (101) and valve seat (102) are provided. A valve cover (103) is provided on the side of the valve body (101) away from the valve seat (102). A valve core (104) is provided inside the valve body (101). A guide tube (105) is fixedly connected to the inner wall of the valve cover (103) near the valve core (104). An adjusting rod (106) is slidably connected to the guide tube (105). One end of the adjusting rod (106) is connected to the valve core (104). A compression spring (107) for squeezing the valve core (104) is sleeved on the inner side wall of the adjusting rod (106) located inside the valve cover (103). A sealing hole (108) is opened on the side of the valve seat (102) near the valve core (104). The sealing hole (108) is matched with the valve core (104). A sealing retaining ring (109) is fixedly connected to the side wall of the valve core (104). Its characteristic is that it further includes: A deceleration mechanism (2) is provided in the guide tube (105) to reduce the speed at the end of the sealing stroke of the valve core (104). The speed reduction mechanism (2) includes a speed reduction plate (201) slidably connected inside the guide tube (105). The speed reduction plate (201) and the adjusting rod (106) are connected to the inner side wall of the guide tube (105). A U-shaped tube (202) is fixedly connected to the side wall of the guide tube (105). The two ends of the U-shaped tube (202) are connected to the guide tube (105) and are respectively located on both sides of the speed reduction plate (201). The U-shaped tube (202) is provided with a control component (3) for controlling the gas flow rate.

2. The spring-loaded safety valve according to claim 1, characterized in that: The control component (3) includes a first control plate (301) fixedly connected to the inner wall of the U-shaped tube (202). The first control plate (301) has a plurality of first control holes. A second control plate (302) is rotatably connected to the side of the first control plate (301) away from the guide tube (105). The second control plate (302) has a plurality of second control holes (303). Each second control hole (303) is matched with a first control hole. The U-shaped tube (202) is provided with a rotating component (4) for driving the second control plate (302) to rotate.

3. The spring-loaded safety valve according to claim 2, characterized in that: The rotating assembly (4) includes an annular rotating groove (401) formed on the inner wall of the U-shaped tube (202). The annular rotating groove (401) is rotatably connected to a gear ring (402). The inner wall of the gear ring (402) is connected to the second control plate (302), and the thickness of the gear ring (402) is less than that of the second control plate (302). Two first fixing plates (403) are fixedly connected to the side wall of the U-shaped tube (202). A sector gear (405) is connected between the two first fixing plates (403) through a rotating rod (404).

4. The spring-loaded safety valve according to claim 3, characterized in that: The side wall of the U-shaped tube (202) is provided with a clearance hole (406), the sector gear (405) is rotatably connected to the clearance hole (406) and meshes with the gear ring (402), and the valve core (104) is provided with a one-way component (5) for rotating the sector gear (405) in one direction.

5. The spring-loaded safety valve according to claim 4, characterized in that: The one-way component (5) includes a second fixing plate (501) fixedly connected to the valve core (104) on the side near the U-shaped tube (202). The side of the second fixing plate (501) near the U-shaped tube (202) is connected to a sliding plate (502) via a retraction component (6). The side of the sliding plate (502) away from the retraction component (6) is fixedly connected to a plurality of meshing plates (503). Each meshing plate (503) has an inclined surface (506) on the side away from the valve core (104). The sidewall of the sector gear (405) is fixedly connected to a plurality of meshing blocks (504). Each meshing block (504) is matched with the meshing plate (503).

6. The spring-loaded safety valve according to claim 5, characterized in that: The retraction assembly (6) includes a retraction hole opened on the side of the second fixed plate (501) near the sliding plate (502). The sliding plate (502) is slidably connected to the retraction hole. A retraction tube (601) is fixedly connected to the bottom wall of the retraction hole. Two retraction tubes (601) are slidably connected to retraction rods (602). One end of the two retraction rods (602) is connected to the sliding plate (502). A first spring (603) is sleeved on the side wall of the two retraction tubes (601). The two ends of the two first springs (603) are respectively connected to the sliding plate (502) and the bottom wall of the retraction hole.

7. The spring-loaded safety valve according to claim 3, characterized in that: One of the two first fixed plates (403) is provided with a return force assembly (7) for returning the rotating rod (404). The return force assembly (7) includes a return plate (701) disposed at the end of the rotating rod (404) away from the first fixed plate (403). A torsion spring (702) is sleeved on the side wall of the rotating rod (404) between the return plate (701) and the first fixed plate (403). The two ends of the torsion spring (702) are respectively connected to the return plate (701) and the first fixed plate (403).

8. The spring-loaded safety valve according to claim 5, characterized in that: The valve core (104) is provided with a cleaning component (9) for cleaning the inner wall of the sealing hole (108). The cleaning component (9) includes an annular cavity (901) opened in the valve core (104). The bottom wall of the annular cavity (901) near the valve seat (102) is provided with a plurality of cleaning holes (902). Each cleaning hole (902) penetrates the valve core (104), and the outlet end of each cleaning hole (902) is inclined outward. A flexible hose (903) is connected to the side wall of the U-shaped tube (202). One end of the flexible hose (903) is connected to the valve core (104) and communicates with the inside of the annular cavity (901).

9. The spring-loaded safety valve according to claim 8, characterized in that: An air inlet pipe (10) is fixedly connected to the side wall of the guide tube (105), and the air inlet pipe (10) is concentrically arranged with the first control board (301).

10. The spring-loaded safety valve according to claim 9, characterized in that: The intake pipe (10) is equipped with a one-way valve (11), and the one-way valve (11) is directed from the outside of the guide pipe (105) to the inside.

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