Safety valve structure

Abstract

The utility model relates to the technical field of safety valves, and particularly discloses a safety valve structure which comprises a first valve body and a second valve body connected with the first valve body. The interior of the first valve body is hollow to form a containing cavity; the first valve body and the second valve body are connected in a sealed mode through a flange. A pressure relief assembly is arranged in the accommodating cavity; the pressure relief assembly extends from the containing cavity of the first valve body to be arranged in the second valve body. Pressure is applied to a valve element in the pressure relief assembly, so that the valve element compresses an energy storage part in the pressure relief assembly to move in the direction away from or close to the first valve body, and the joint of the first valve body and the second valve body is communicated or closed; the first valve body and the second valve body are communicated through the joint of the first valve body and the second valve body to form a pressure relief flow channel, high-pressure gas can be sent away, and adverse effects on a pipeline due to continuous accumulation of pressure are effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of safety valve technology, and in particular to a safety valve structure. Background Technology

[0002] Safety valves, as crucial pressure protection devices, are widely used in various gas storage and transportation systems to ensure that the system pressure remains within a safe range during operation. Especially in high-pressure environments, safety valves can automatically release excessive pressure, preventing equipment damage, pipeline rupture, and potential hazards caused by gas leaks. Therefore, the response speed, sealing performance, and adjustment accuracy of safety valves directly affect the safety and stability of the system. The storage and transportation of gases such as helium, oxygen, nitrogen, and argon generally require high-pressure environments, necessitating the use of safety valves capable of withstanding high pressure and opening rapidly at a set pressure. This high-pressure control capability ensures rapid pressure release when the internal system pressure exceeds a safe threshold, protecting pipelines and equipment.

[0003] Patent "Overpressure Protector" (publication number CN201896977U, hereinafter referred to as Prior Art 1) discloses an overpressure protector for gas transportation. In Prior Art 1, when the measured pressure is too high, it can cut off the pressure; when there is overpressure, it provides protection. Specifically, the overpressure protector includes a first pressure-conducting pipe and a second pressure-conducting pipe. The first pressure-conducting pipe is equipped with a telescopic shut-off valve, and the second pressure-conducting pipe is equipped with a movable partition and a control rod for the telescopic shut-off valve. When the measured pressure is too high, the pressure in the second pressure-conducting pipe also increases. The movable partition moves towards the telescopic shut-off valve and compresses the spring, simultaneously driving the control rod of the telescopic shut-off valve to actuate until the passage of the first pressure-conducting pipe is cut off, thus providing overpressure protection. When the measured pressure decreases, the spring returns to its original position, pushing the pneumatic partition back and simultaneously pulling the control rod back, reopening the passage of the first pressure-conducting pipe for normal pressure measurement.

[0004] Although the existing technology 1 employs a method of using high-pressure gas to propel a moving partition to quickly close the inlet-outlet passage when pressure becomes too high, thus preventing excessive fluid flow, this approach has a drawback. When the pressure inside the pipeline exceeds a safety threshold, the rapid closure of the moving partition prevents timely pressure release, creating a high-pressure zone within the pipeline. Over time, this high-pressure state can exert significant stress on the pipeline material, especially in cases of material aging or minor defects, potentially exacerbating material damage. If the pressure continues to accumulate without effective control, it may ultimately lead to pipeline damage or even rupture. Utility Model Content

[0005] In view of this, this utility model provides a safety valve structure to solve the problem that when the fluid pressure in the pipeline is too high, it cannot be discharged in time, which may lead to pipeline damage.

[0006] This utility model provides a safety valve structure, including a first valve body and a second valve body connected to the first valve body; the first valve body has a hollow interior forming a receiving cavity; the first valve body and the second valve body are sealed together by a flange; a pressure relief assembly is provided in the receiving cavity; the pressure relief assembly extends from the receiving cavity of the first valve body and is disposed inside the second valve body; pressure is applied to the valve core in the pressure relief assembly, causing the valve core to compress the energy storage element in the pressure relief assembly and move it away from or towards the first valve body, and the connection between the first valve body and the second valve body is connected or closed; when the connection between the first valve body and the second valve body is connected, a pressure relief flow channel is formed.

[0007] Preferably, the pressure relief assembly includes a limiting member and a guide shaft disposed within the limiting member, wherein a first bushing and a second bushing are respectively provided at both ends of the guide shaft; the first bushing is fixedly installed on the guide shaft, and the second bushing is slidably installed on the guide shaft.

[0008] Preferably, both the first bushing and the second bushing are provided with grooves; the openings of the grooves of the first bushing and the second bushing are arranged opposite to each other; the energy storage component is sleeved on the guide shaft and its two ends are respectively disposed in the grooves of the first bushing and the second bushing.

[0009] Preferably, the second valve body has a guide cylinder in the inner cavity at the connection with the first valve body; the second valve body has a boss in the inner cavity at the connection with the first valve body for accommodating the guide cylinder.

[0010] Preferably, the valve core is disposed inside the guide cylinder; the valve core moves inside the guide cylinder to open or close the opening of the guide cylinder; the valve core abuts against the guide shaft.

[0011] Preferably, the valve core includes a guide portion disposed inside the guide cylinder and a sealing portion that contacts the top of the guide cylinder; the diameter of the sealing portion is not less than the diameter of the guide cylinder; when the sealing portion engages with the top of the guide cylinder, it seals the guide cylinder.

[0012] Preferably, the guide portion is formed by a first guide block and a second guide block arranged in a cross shape, and the ends of the first guide block and the second guide block are provided with anti-detachment blocks; the guide cylinder is provided with a guide groove for accommodating the anti-detachment blocks, and the guide groove is provided with a protrusion at the top to restrict the anti-detachment blocks; when the anti-detachment blocks contact the protrusions, the valve core is restricted to move away from the guide cylinder.

[0013] Preferably, the first valve body is provided with at least a pressure relief port, a first air inlet, and an adjustment port; the limiting member is disposed in the first valve body through the adjustment port and the adjustment port is sealed by the valve cap.

[0014] Preferably, the second valve body is provided with at least a second air inlet, an air outlet, and a safety valve port; the first valve body is connected to the safety valve port of the second valve body through the first air inlet.

[0015] Preferably, the first air inlet and the safety valve port are sealed together, and the connection between the first air inlet and the safety valve port is fixed by fastening bolts.

[0016] The safety valve structure provided by this utility model has the following beneficial effects:

[0017] This invention utilizes a pressure-relieving channel formed between the first and second valve bodies. When the internal pressure of the pipeline is excessively high, this safety valve automatically opens the channel to discharge the overpressured fluid. This prevents the prolonged presence of high-pressure areas and effectively prevents the adverse effects of continuous pressure accumulation on the pipeline. It also avoids the problem of pressure not being released in time due to the rapid closure of the moving partition in traditional structures, thus ensuring that the pipeline system can quickly relieve pressure when it exceeds the threshold, guaranteeing the overall safety of the system. As the pressure decreases, the stress on the pipeline material also decreases accordingly, thereby reducing long-term wear and tear on the pipeline. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0019] Figure 1 This is a structural diagram of a safety valve.

[0020] Figure 2 This is a cross-sectional view of the internal structure of a safety valve.

[0021] Figure 3 This is another internal structural cross-sectional view of a safety valve structure;

[0022] Figure 4 This is a structural schematic diagram of a safety valve pressure relief component.

[0023] Figure 5 This is a schematic diagram of the structure of a safety valve core.

[0024] Parts and component numbers in the diagram:

[0025] 100-First valve body, 110-Receiving cavity, 120-Flange, 130-Pressure relief port, 140-First air inlet, 150-Adjusting port, 160-Valve cap;

[0026] 200-Pressure relief component, 210-Energy storage component, 220-Limiting component, 230-Guide shaft, 231-First bushing, 232-Second bushing, 233-Groove, 240-Guide cylinder, 250-Valve core, 251-Guide part, 252-First guide block, 253-Second guide block, 254-Anti-detachment block, 255-Sealing part, 260-Pressure relief flow channel;

[0027] 300-Second valve body, 310-Boss, 320-Protrusion, 330-Second air inlet, 340-Air outlet, 350-Safety valve port, 360-Guide groove. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0029] Example 1

[0030] Please see Figure 1This utility model provides a safety valve structure. In the transportation of various gases, excessive pressure may be generated. Therefore, a safety valve is needed to release the high-pressure gas to prevent excessive pressure from damaging the equipment or causing production accidents.

[0031] The safety valve structure provided in this embodiment includes a first valve body 100 and a second valve body 300 connected to the first valve body 100;

[0032] Please see Figure 1 and Figure 2 The first valve body 100 and the second valve body 300 are hollowly arranged to form a receiving cavity 110. This receiving cavity 110 is not only used to house the pressure relief component 200, but also for the flow of gas during normal operation. Generally, during normal operation, gas only flows through the second valve body 300.

[0033] Please see Figure 2 The first valve body 100 and the second valve body 300 are sealed together by a flange 120. When the gas is being transported or stored normally, the gas only flows through the second valve body 300. Through the seal between the first valve body 100 and the second valve body 300, the gas can only operate normally in the second valve body 300, thus not affecting the first valve body 100. At this time, the first valve body 100 is in a "dormant" or "waiting-to-work" state.

[0034] A pressure relief component 200 is provided within the receiving cavity 110 of the first valve body 100. The pressure relief component 200 extends from the receiving cavity 110 of the first valve body 100 and is disposed inside the second valve body 300. The pressure relief component 200 firstly closes the connection between the first valve body 100 and the second valve body 300, so that the first valve body 100 and the second valve body 300 cannot communicate.

[0035] Please refer to the following when using it. Figure 3When gas flows within the second valve body 300, a portion of it is transported or stored to a designated location, while another portion impacts the pressure relief assembly 200. When the overall gas pressure is too high, the pressure impacting the pressure relief assembly 200 also increases. When this pressure is sufficiently high, it exerts pressure on the valve core 250 within the pressure relief assembly 200, causing it to compress. The valve core 250 then pushes the energy storage element 210 within the pressure relief assembly 200 to move away from or towards the first valve body 100, thereby connecting the connection between the first valve body 100 and the second valve body 300. When the connection between the first valve body 100 and the second valve body 300 is established, a pressure relief channel 260 is formed. At this time, a portion of the high-pressure gas is released through the pressure relief channel 260 to alleviate the pressure within the pipeline or safety valve.

[0036] Furthermore, the pressure relief component 200 opens the connection between the valve bodies when the internal pressure of the system is too high, thereby quickly releasing the excessive pressure and preventing the system from bursting or being damaged due to excessive pressure. By designing a pressure relief channel 260 between the first valve body 100 and the second valve body 300, this safety valve can quickly open the pressure relief channel when the internal pressure of the pipeline exceeds a safety threshold, discharging the excessively high-pressure fluid from the pipeline. This avoids the long-term existence of high-pressure areas and effectively prevents the adverse effects on the pipeline caused by continuous pressure accumulation. When a high-pressure area forms in the pipeline, the pressure relief component 200, by releasing the excessively high-pressure gas, can transfer the stress in the high-pressure area to the pressure relief channel 260, reducing the direct force of pressure on the pipeline material. As the pressure decreases, the stress on the pipeline material also decreases accordingly, thereby reducing long-term wear and tear on the pipeline.

[0037] In the safety valve structure, the pressure relief assembly 200 further includes a limiting member 220 and a guide shaft 230 installed within the limiting member 220. The limiting member 220 is used to fix and restrict the position of the guide shaft 230, ensuring that the guide shaft 230 remains stable during use. The guide shaft 230 is fixedly installed inside the limiting member 220, providing precise guidance to ensure smooth operation of moving parts during pressure relief. A first bushing 231 and a second bushing 232 are respectively provided at both ends of the guide shaft 230. The first bushing 231 is fixedly installed on the guide shaft 230 and will not change position with the movement of the guide shaft 230; while the second bushing 232 is slidably installed on the guide shaft 230 and can move along the guide shaft 230, thereby undergoing corresponding displacement under pressure.

[0038] In the structure of the pressure relief assembly 200, the first bushing 231 and the second bushing 232 are respectively provided with grooves 233, and the opening directions of the grooves 233 are arranged opposite to each other. The energy storage component 210 (e.g., spring, hydraulic damper, magnetic energy storage component, rubber bladder, air bladder, etc.) is sleeved on the guide shaft 230, and its two ends are respectively embedded in the grooves 233 of the first bushing 231 and the second bushing 232. This design allows the two ends of the energy storage component 210 to be supported by the first bushing 231 and the second bushing 232 respectively, and to be evenly compressed when subjected to force.

[0039] When the valve core 250 applies pressure to the pressure relief assembly 200, it first acts on the sliding second bushing 232, compressing it. Under external pressure, the second bushing 232 moves towards the first bushing 231, thereby compressing the energy storage element 210 between them, causing the energy storage element 210 to generate elastic potential energy. As the energy storage element 210 is compressed, the relative positions of the first bushing 231 and the second bushing 232 change, pushing the connection between the first valve body 100 and the second valve body 300 to open, forming a connected pressure relief channel 260, thereby allowing the high-pressure gas inside the pipeline to be released.

[0040] When the external pressure drops below a set value, the energy storage component 210 releases its stored elastic potential energy, pushing the slidingly mounted second bushing 232 back to its original position. Simultaneously, the energy released by the energy storage component 210 exerts a reverse thrust on the valve core 250, pushing it back to its initial position, thus closing the pressure relief passage 260 and restoring the sealing state at the connection between the first valve body 100 and the second valve body 300, stopping the pressure relief process. This design enables the pressure relief component 200 to automatically open under high pressure and automatically reset under low pressure.

[0041] In this embodiment, the cooperation between the limiting member 220 and the guide shaft 230 ensures the stability of the movement trajectory of the second bushing 232 during pressure and reset, reducing frictional resistance and offset during the operation of the valve core 250. This ensures good guidance of the valve core 250 during opening and closing, improving the accuracy of the pressure relief action. The precise positioning of the energy storage element 210 by the first bushing 231 and the second bushing 232 better controls the pressure state of the energy storage element 210, ensuring uniform force distribution under high pressure and guaranteeing the smoothness and reliability of the pressure relief process.

[0042] Furthermore, under high pressure, the sliding second bushing 232 can rapidly compress the energy storage element 210 under pressure, causing the pressure relief channel 260 to open in a timely manner, thereby quickly releasing the excessive pressure in the pipeline. Compared with the traditional moving partition design, this design reduces the delay in the pressure release process and improves the system's response speed.

[0043] When the external pressure decreases, the energy storage component 210 releases the stored elastic potential energy, causing the second bushing 232 to quickly reset, thereby rapidly closing the pressure relief channel 260. This can restore the system to its normal sealing state in a short time and prevent system instability caused by excessive pressure relief.

[0044] Please see Figure 1 The safety valve structure includes a first valve body 100 and a second valve body 300 connected to the first valve body 100, with the two valve bodies sealed together by a flange 120. The second valve body 300 has a guide cylinder 240 within its inner cavity at the connection point with the first valve body 100, and a boss 310 for housing the guide cylinder 240 within the inner cavity. This boss 310 not only provides a stable mounting position for the guide cylinder 240 but also enhances the structural stability of the guide cylinder 240 under high pressure, preventing displacement or vibration caused by pressure changes. By providing the guide cylinder 240 and the boss 310 for fixing the guide cylinder 240 within the second valve body 300, the guiding accuracy of the valve core 250 during movement is increased, and the stability of the guide cylinder 240 under high pressure is ensured. The sealing design of the sealing portion 255 of the valve core 250 and the top of the guide cylinder 240 ensures effective control of the opening and closing of the pressure relief channel under high pressure, reducing safety hazards caused by leakage.

[0045] Please see Figure 2 and Figure 4 The valve core 250 is located inside the guide cylinder 240 and can move axially within the guide cylinder 240. When the valve core 250 moves within the guide cylinder 240, it can open or close the opening of the guide cylinder 240, thereby controlling the opening and closing of the pressure relief channel. The movement of the valve core 250 is achieved by abutting against the guide shaft 230. When the valve core 250 is pressurized, it pushes the bushing on the guide shaft 230, and precise control is achieved through the energy storage element 210 of the pressure relief assembly 200.

[0046] Please see Figure 5 The valve core 250 includes a guide portion 251 and a sealing portion 255. The guide portion 251 is disposed within the guide cylinder 240, and the sealing portion 255 contacts the top of the guide cylinder 240 to form a seal. When the sealing portion 255 engages with the top of the guide cylinder 240, the diameter of the sealing portion 255 is greater than or equal to the diameter of the guide cylinder 240, thus effectively preventing fluid from passing through the opening of the guide cylinder 240 and closing the pressure relief channel. The design of the sealing portion 255 ensures good sealing performance under high pressure, effectively preventing gas leakage.

[0047] Please see Figure 1 and Figure 5The guide portion 251 is formed by a cross arrangement of a first guide block 252 and a second guide block 253. This design enhances the stability of the guide portion 251 within the guide cylinder 240, preventing the valve core 250 from shifting during movement. Each guide block has an anti-detachment block 254 at its end to prevent it from detaching from the guide cylinder 240. The guide cylinder 240 also has a guide groove 360 ​​that matches the anti-detachment block 254. The top of the guide groove 360 ​​has a protrusion 320 to restrict the movement of the anti-detachment block 254. When the anti-detachment block 254 contacts the protrusion 320 at the top of the guide groove 360, the valve core 250 is restricted from moving away from the guide cylinder 240, thus preventing the valve core 250 from detaching from the guide cylinder 240 due to excessive external force and ensuring the reliability and stability of the valve core 250 throughout its operating range.

[0048] Please see Figure 1 and Figure 2 The first valve body 100 is provided with a pressure relief port 130, a first air inlet 140, and an adjustment port 150. The pressure relief port 130 is used to discharge excess gas to maintain stable system pressure. The adjustment port 150 is used to install a limiting member 220, which allows for adjustment of the internal structure to ensure the system's adaptability under different operating conditions. The adjustment port 150 is sealed by a valve cap 160 to prevent the external environment from affecting the internal components. The sealing design of the valve cap 160 ensures that there is no gas leakage in the adjustment port 150 under normal operating conditions, while also facilitating maintenance and adjustment.

[0049] The second valve body 300 is provided with a second air inlet 330, an air outlet 340, and a safety valve port 350. The second air inlet 330 is used to supply high-pressure gas into the system, the air outlet 340 is used to discharge regulated gas, and the safety valve port 350 is used to connect with the first air inlet 140 of the first valve body 100, thereby forming a complete fluid channel. The connection between the first air inlet 140 and the safety valve port 350 is fixed by fastening bolts, and a seal is provided at the joint to ensure the sealing and stability of the joint under high pressure, avoiding leakage due to pressure changes. The first air inlet 140 and the safety valve port 350 are fixed together by the seal and fastening bolts to ensure good sealing at the connection under high pressure, thereby avoiding the risk of leakage due to pressure fluctuations. The valve cap 160 seals the regulating port 150, further reducing the impact of the external environment on internal components and extending the service life of the system.

[0050] The sealing portion 255 of the valve core 250 is designed with an elastic surface to ensure good sealing performance and a certain degree of flexibility under high pressure. The end of the sealing portion 255 that abuts against the guide shaft 230 is designed to be conical, but its design does not include the pointed tip of the cone; instead, it is a flexible arc-shaped contact area. This design allows the guide shaft 230 to apply pressure to the sealing portion 255 when it comes into contact with the valve core 250, partially compressing and deforming it without puncturing the sealing portion 255, thereby ensuring the integrity and reliability of the sealing portion 255 under high pressure.

[0051] When the internal pressure of the system increases to a certain level, the high-pressure gas first pushes the valve core 250 to move along the guide shaft 230. The sealing part 255 undergoes slight deformation after being squeezed by the guide shaft 230 and overcomes its elastic restoring force, resulting in relative displacement between the guide shaft 230 and the sealing part 255. Because the sealing part 255 is elastic, it will quickly return to its original shape after the high pressure is released, re-engage with the top of the guide cylinder 240, and restore the sealing state.

[0052] Throughout the pressure regulation process, the force of the high-pressure gas acts sequentially on the contact area between the sealing part 255 and the guide shaft 230, and on the process of the valve core 250 pushing the energy storage element 210. Normally, the pressure required for the relative movement between the sealing part 255 of the valve core 250 and the guide shaft 230 is relatively small. Therefore, when the system pressure rises slightly, this part can make minor adjustments to cope with slight pressure fluctuations. However, when the system pressure rises further, exceeding the preload set by the energy storage element 210, the valve core 250 will further push the energy storage element 210, causing it to compress and opening a larger pressure relief channel to quickly expel excess gas.

[0053] Furthermore, this design enables two-stage pressure regulation through the cooperation of the sealing part 255 and the guide shaft 230: firstly, a small-range, fine-tuning pressure relief is achieved through the elastic deformation of the sealing part 255; secondly, a large-range pressure release is regulated by the pre-tightening force of the energy storage element 210. This structure effectively controls the rate of pressure increase within the system, preventing damage to the system from sudden pressure surges. Simultaneously, the elastic design of the sealing part 255 ensures that the system can quickly restore a sealed state when the pressure drops, contributing to maintaining the system's safety and stability.

[0054] In this embodiment, this design allows the safety valve to more precisely control the pressure release process, making it particularly suitable for pressure-sensitive high-pressure gas systems, such as oxygen, nitrogen, and ammonia delivery systems. In these applications, by finely controlling the movement of the valve core 250 and the compression process of the accumulator 210, real-time and stable regulation of the system pressure can be achieved, preventing pipeline rupture or equipment damage caused by excessive pressure. Simultaneously, it ensures that the system can quickly rebuild its sealing state and maintain normal operation after pressure recovery.

[0055] Furthermore, the safety valve structure can be adapted to pipeline systems containing different types of gases and liquids, such as oxygen, nitrogen, ammonia, and other gases, or water, oil, and other liquids, by adjusting the preload of the internal energy storage component 210 or the pressure setting of the pressure relief component 200. It is highly adaptable and easy to use in various industrial environments.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A safety valve structure, characterized in that, It includes a first valve body (100) and a second valve body (300) connected to the first valve body (100); the first valve body (100) is hollow inside to form a receiving cavity (110); the first valve body (100) and the second valve body (300) are sealed together by a flange (120); The receiving cavity (110) is provided with a pressure relief component (200); the pressure relief component (200) extends from the receiving cavity (110) of the first valve body (100) and is disposed inside the second valve body (300); Pressure is applied to the valve core (250) in the pressure relief assembly (200), causing the valve core (250) to compress the energy storage element (210) in the pressure relief assembly (200) to move away from or towards the first valve body (100), and the connection between the first valve body (100) and the second valve body (300) is connected or closed; when the connection between the first valve body (100) and the second valve body (300) is connected, a pressure relief flow channel (260) is formed.

2. The safety valve structure according to claim 1, characterized in that, The pressure relief assembly (200) includes a limiting member (220) and a guide shaft (230) disposed within the limiting member (220). The two ends of the guide shaft (230) are respectively provided with a first bushing (231) and a second bushing (232). The first bushing (231) is fixedly installed on the guide shaft (230), and the second bushing (232) is slidably installed on the guide shaft (230).

3. The safety valve structure according to claim 2, characterized in that, The first bushing (231) and the second bushing (232) are both provided with grooves (233); the openings of the grooves (233) of the first bushing (231) and the second bushing (232) are arranged opposite to each other; the energy storage component (210) is sleeved on the guide shaft (230) and its two ends are respectively arranged in the grooves (233) of the first bushing (231) and the second bushing (232).

4. The safety valve structure according to claim 2, characterized in that, The second valve body (300) has a guide cylinder (240) in the inner cavity at the connection with the first valve body (100); the second valve body (300) has a boss (310) in the inner cavity at the connection with the first valve body (100) for placing the guide cylinder (240).

5. A safety valve structure according to claim 4, characterized in that, The valve core (250) is disposed inside the guide cylinder (240); the valve core (250) moves inside the guide cylinder (240) to open or close the opening of the guide cylinder (240); the valve core (250) abuts against the guide shaft (230).

6. A safety valve structure according to claim 5, characterized in that, The valve core (250) includes a guide portion (251) disposed inside the guide cylinder (240) and a sealing portion (255) in contact with the top of the guide cylinder (240); the diameter of the sealing portion (255) is not less than the diameter of the guide cylinder (240); when the sealing portion (255) engages with the top of the guide cylinder (240), it seals the guide cylinder (240).

7. A safety valve structure according to claim 6, characterized in that, The guide section (251) is formed by a cross-shaped arrangement of a first guide block (252) and a second guide block (253). The ends of the first guide block (252) and the second guide block (253) are provided with anti-detachment blocks (254). The guide cylinder (240) is provided with a guide groove (360) for accommodating the anti-detachment blocks (254). The guide groove (360) is provided with a protrusion (320) at the top to restrict the anti-detachment blocks (254). When the anti-detachment blocks (254) contact the protrusion (320), the valve core (250) is restricted to move away from the guide cylinder (240).

8. A safety valve structure according to claim 2, characterized in that, The first valve body (100) is provided with at least a pressure relief port (130), a first air inlet (140) and an adjustment port (150); the limiting member (220) is provided in the first valve body (100) through the adjustment port (150) and the adjustment port (150) is sealed by the valve cap (160).

9. A safety valve structure according to claim 8, characterized in that, The second valve body (300) is provided with at least a second air inlet (330), an air outlet (340) and a safety valve port (350); the first valve body (100) is connected to the first air inlet (140) and the safety valve port (350) of the second valve body (300).

10. A safety valve structure according to claim 9, characterized in that, The first air inlet (140) and the safety valve port (350) are sealed together, and the connection between the first air inlet (140) and the safety valve port (350) is fixed by fastening bolts.

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