Pressure release valve

Abstract

The pressure release valve comprises a valve cover, one side of the valve cover is connected with an air inlet and outlet, a valve body is connected in the valve cover, the top of the valve body is connected with a valve top cover, a valve body sealing gasket is connected between the valve body and the valve top cover, the bottom of the valve body sealing gasket is connected with a pressure supplementing valve element, and the pressure supplementing valve element is connected with the valve body through a pressure supplementing spring. The top of the valve body sealing gasket is connected with a pressure relief valve element, and the pressure relief valve element is connected with the valve top cover through a pressure relief spring. The device has the beneficial effects that accurate pressure regulation and control can be realized; the system life can be prolonged; the system adaptability can be improved. Due to the fact that different application systems have different requirements for pressure control precision, the adjustable design of the pressure release valve can meet diversified requirements. The structural reliability is high.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline pressure control, and in particular to a pressure relief valve. Background Art

[0002] Thermal management systems, thermal energy storage systems, and heat exchange systems play an indispensable role in many industrial fields and various types of equipment in daily life. The heating and cooling pipelines in these systems are key components, and the stability of their internal pressure is directly related to the operating status and life of the entire system. However, existing valve technology has exposed many defects when facing this key demand.

[0003] Most traditional valves are limited in function and can only perform basic pressure relief operations. From the perspective of the pressure requirements for normal system operation, they cannot accurately maintain the system pressure in a suitable working range. On the one hand, when the internal pressure of the system rises due to factors such as long-term operation, sudden changes in ambient temperature, and drastic changes in load, these conventional valves lack a flexible and effective adjustment mechanism. They cannot open the pressure relief channel in a timely and accurate manner based on the preset reasonable high-pressure threshold, causing the system to continue to be subjected to excessive pressure. This high-pressure environment can easily cause physical deformation of the pipeline, and the pipe wall may swell, bend, or even rupture, which not only seriously interferes with the normal flow of the medium in the system, but also greatly reduces the heat transfer efficiency of the system, which directly leads to the failure of the entire system to operate normally.

[0004] On the other hand, when the system undergoes a specific working condition transition, such as the shutdown cooling stage, the coolant shrinks due to the decrease in temperature, and vacuum negative pressure is easily generated inside the pipeline. At this time, the existing valves do not have the automatic pressure replenishment function, and cannot actively introduce external gas to balance the pressure. The negative pressure will cause the pipeline to be subjected to inward extrusion stress. Over time, the pipeline may be compressed, resulting in obstruction of medium flow, seriously affecting the performance of the system after it is restarted, and greatly shortening the overall service life of the system. Moreover, different systems have different requirements for pressure control accuracy. Valves with a single pressure relief function are completely unable to adapt to such diverse needs, which greatly limits the optimization, upgrading and wide application of related systems.

[0005] To sum up, it is urgent to develop a new type of pressure relief valve that can fully and accurately control pipeline pressure and integrates pressure relief and pressure replenishment functions. This is also a key link in promoting technological progress in many related industries. Summary of the invention

[0006] In order to solve the above problems, especially to address the deficiencies in the prior art, the present invention provides a pressure relief valve that can solve the above problems.

[0007] To achieve the above purpose, the present invention adopts the following technical means:

[0008] A pressure relief valve comprises a valve cover, one side of the valve cover is connected to an air inlet and outlet, a valve body is connected inside the valve cover, the top of the valve body is connected to a valve top cover, a valve body sealing gasket is connected between the valve body and the valve top cover, a pressure-compensating valve core is connected to the bottom of the valve body sealing gasket, the pressure-compensating valve core is connected to the valve body through a pressure-compensating spring, a pressure-relief valve core is connected to the top of the valve body sealing gasket, and the pressure-relief valve core is connected to the valve top cover through a pressure-relief spring.

[0009] A further solution of the present invention is that the valve cover is made integrally with the air inlet and outlet.

[0010] A further solution of the present invention is that the valve cover is connected to the valve body by threads or sealing welding.

[0011] A further solution of the present invention is that a sealing gasket is connected to the connection between the valve cover and the valve body.

[0012] A further solution of the present invention is that the pressure-compensating valve core and the pressure-relieving valve core are respectively connected to the valve body sealing gasket by using conical surface sealing or high-precision flat surface sealing.

[0013] A further solution of the present invention is that the valve top cover is fixed to the top of the valve body by means of threads or buckles.

[0014] Beneficial effects of the present invention:

[0015] 1. The present invention can accurately control pressure. The pressure relief valve of the present invention can sense pressure changes in real time and accurately according to the actual operating conditions of the system. When the pipeline pressure exceeds the preset normal high-pressure threshold, the pressure relief valve core responds quickly, overcomes the resistance of the pressure relief spring and opens, and discharges excess pressure in time, effectively avoiding damage to the pipeline due to high pressure; and when the system pressure is lower than the normal low-pressure threshold, such as when negative pressure is generated during shutdown cooling, the pressure-replenishing valve core operates in time to introduce external gas to supplement the pressure, ensuring that the system pressure is always maintained in a suitable working range, greatly improving the accuracy and stability of system pressure control.

[0016] 2. The present invention can extend the life of the system. Through precise control of pipeline pressure, it effectively prevents pipeline bulging and rupture caused by high pressure and pipeline extrusion deformation and collapse caused by negative pressure. The stable pressure environment allows the pipeline to always maintain a good physical state, the medium can flow smoothly, and the heat transfer efficiency of the system can be stably maintained, thereby greatly extending the service life of the entire thermal management, thermal energy storage, heat exchange and other systems, and reducing the maintenance cost and replacement frequency of the equipment.

[0017] 3. The present invention can improve system adaptability. In view of the different requirements for pressure control accuracy of different application systems, the adjustable design of the pressure relief valve can meet diverse needs. Whether it is a fine chemical heat exchange system that is highly sensitive to pressure fluctuations, or a large-scale industrial thermal management system with complex and changeable working conditions, the pressure relief valve can adapt to the pressure characteristics of different systems with its flexible pressure relief and pressure replenishment functions, removing obstacles to pressure control for the optimization, upgrading and wide application of various systems, and effectively promoting technological progress in related industries.

[0018] 4. The structure of the present invention has high reliability. The valve cover and the valve body are connected by thread or sealed welding and equipped with sealing gaskets. The fixing methods of the valve top cover and the valve body are diverse and stable. At the same time, the valve core and the sealing gasket are connected by conical sealing or high-precision flat sealing. These fine structural designs ensure the overall sealing and mechanical strength of the pressure relief valve. Under long-term and complex working conditions, it can still operate stably, reducing the risk of failure caused by loose components, leakage and other problems, and ensuring the continuous and reliable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0020] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0021] Figure 3 is a side view of the present invention;

[0022] Figure 4 For the present invention Figure 3 Sectional view in the AA direction;

[0023] Reference numerals:

[0024] Valve cover 1, sealing gasket 2, valve body 3, pressure compensation spring 4, pressure compensation valve core 5, valve body sealing gasket 6, pressure relief valve core 7, pressure relief spring 8, valve top cover 9, air inlet and outlet 10. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1

[0027] like Figure 1-4As shown, a pressure relief valve comprises a valve cover 1, one side of the valve cover 1 is connected with an air inlet and outlet 10, a valve body 3 is connected inside the valve cover 1, the top of the valve body 3 is connected with a valve top cover 9, a valve body sealing gasket 6 is connected between the valve body 3 and the valve top cover 9, a pressure-compensating valve core 5 is connected to the bottom of the valve body sealing gasket 6, the pressure-compensating valve core 5 is connected to the valve body 3 through a pressure-compensating spring 4, a pressure-relief valve core 7 is connected to the top of the valve body sealing gasket 6, and the pressure-relief valve core 7 is connected to the valve top cover 9 through a pressure-relief spring 8.

[0028] How it works

[0029] When the system is in operation, such as in a thermal management system, the coolant absorbs heat and expands, which causes the internal circulation pressure of the system to gradually rise. At this time, the pressure will directly act on the pressure relief valve core 7. Since the pressure relief valve core 7 is connected to the valve top cover 9 through the pressure relief spring 8, and the pressure relief spring 8 has adjusted its elastic parameters according to the normal high pressure threshold value preset by the system. When the system pressure exceeds the threshold, the thrust generated by the pressure is sufficient to overcome the resistance of the pressure relief spring 8, pushing the pressure relief valve core 7 to move upward, so that the seal between the pressure relief valve core 7 and the valve body sealing gasket 6 is opened. In this way, the excess pressure in the system can be quickly discharged to the external environment through the air inlet and outlet 10 on one side of the valve cover 1, thereby effectively avoiding excessive system pressure and preventing the pipeline from being damaged by bulging, rupture, etc. due to high pressure.

[0030] When the system stops working, the coolant begins to cool down and shrink, and a vacuum negative pressure will be generated inside the system. The negative pressure acts on the pressure-compensating valve core 5. The pressure-compensating spring 4 connected to the bottom of the pressure-compensating valve core 5 also has an elastic coefficient set according to the normal low-pressure threshold of the system. Under the suction of the negative pressure, the pressure-compensating valve core 5 overcomes the resistance of the pressure-compensating spring 4 and moves downward, breaking the sealing state between the pressure-compensating valve core 5 and the valve body sealing gasket 6. Driven by the pressure difference, the external gas enters the system through the air inlet and outlet 10, and promptly replenishes the pressure reduced by the contraction of the coolant, ensuring the stability of the system pressure, avoiding problems such as extrusion deformation and collapse of the pipeline due to negative pressure, and ensuring that the system can operate normally when it is started again.

[0031] Example 2

[0032] like Figure 1-4 As shown, a pressure relief valve comprises a valve cover 1, one side of the valve cover 1 is connected with an air inlet and outlet 10, a valve body 3 is connected inside the valve cover 1, the top of the valve body 3 is connected with a valve top cover 9, a valve body sealing gasket 6 is connected between the valve body 3 and the valve top cover 9, a pressure-compensating valve core 5 is connected to the bottom of the valve body sealing gasket 6, the pressure-compensating valve core 5 is connected to the valve body 3 through a pressure-compensating spring 4, a pressure-relief valve core 7 is connected to the top of the valve body sealing gasket 6, and the pressure-relief valve core 7 is connected to the valve top cover 9 through a pressure-relief spring 8.

[0033] The valve cover 1 and the air inlet and outlet 10 are made in one piece.

[0034] The advantages of the above settings are:

[0035] In terms of mechanical properties, one-piece molding greatly enhances structural rigidity. Since there is no weak point between the valve cover 1 and the air inlet and outlet 10, in the face of strong vibrations generated during system operation, such as continuous vibrations caused by pump operation and high-speed flow of fluid in large industrial heat exchange systems, the one-piece structure can maintain its own shape stability and will not cause structural deformation due to the accumulation of small displacements at the connection parts like the split design, thereby ensuring that the precision components inside the pressure relief valve are always in a precise working position and maintain stable pressure regulation performance.

[0036] From the perspective of reliability, this design significantly reduces the risk of failure. The connection parts of the traditional split structure are easily corroded by the external environment. Moisture, corrosive gases, etc. may penetrate into the connection parts, corroding the sealing materials and metal parts over time, causing leakage failures. The integrally manufactured valve cover 1 is seamlessly connected to the inlet and outlet 10, and the external corrosive media cannot enter seamlessly, which greatly improves the reliability of the pressure relief valve in harsh working environments, ensures long-term stable operation of the system, reduces downtime caused by valve maintenance, and improves production efficiency.

[0037] In terms of fluid dynamics, the integrated structure optimizes the gas inlet and outlet channels. The integrated molding of the valve cover 1 and the inlet and outlet ports 10 can achieve a smoother flow channel transition and reduce turbulence during gas flow. In a thermal management system, when rapid pressure relief or pressure replenishment is required, a smooth flow channel allows gas to pass efficiently, speeds up pressure regulation, improves system response timeliness, avoids damage to the pipeline due to pressure regulation lag, and further enhances system operation stability.

[0038] In terms of cost control, one-piece manufacturing not only reduces the consumption of raw materials and eliminates the need for additional metal materials for connecting parts, but also reduces processing costs. During the production process, there is no need for high-precision processing and assembly debugging of the connecting parts, which shortens the manufacturing time and reduces the scrap rate. In the large-scale production of pressure relief valves, these cost savings accumulate to a considerable amount, improving the market competitiveness of the product.

[0039] The valve cover 1 is connected to the valve body 3 by thread or sealing welding.

[0040] The advantages of the above settings are:

[0041] From the perspective of installation and maintenance convenience, the threaded connection method shows unique advantages. In the initial assembly stage of the equipment, the operator can relatively easily screw the valve cover 1 onto the valve body 3. This operation does not require the use of complex professional tools, but can be completed with simple tools such as conventional wrenches, which greatly improves the assembly efficiency and is especially suitable for the rapid assembly needs on large-scale production lines. Moreover, when the pressure relief valve needs to be inspected, the valve core replaced, or the internal cleaning is cleaned during subsequent use, the threaded connection makes the valve cover 1 easy to disassemble, and the maintenance personnel can quickly open the valve cover 1, accurately locate the problem parts and deal with them in time, effectively shortening the equipment downtime maintenance time, reducing maintenance costs, and ensuring the continuous operation of the entire system.

[0042] Sealed welding connections are excellent in terms of sealing. For some thermal management, thermal energy storage or heat exchange systems that have extremely high pressure control accuracy requirements and harsh working environments, such as thermal control systems in the aerospace field, even extremely small leaks may cause serious consequences. Sealed welding can achieve a permanent and seamless connection between the valve cover 1 and the valve body 3, completely eliminating the possibility of gas leakage, ensuring the stability of the internal pressure environment of the pressure relief valve, making the pressure regulation accurate and correct, and providing a solid guarantee for the stable operation of the system.

[0043] From the perspective of structural stability, both threaded connection and sealed welding connection can provide reliable support for the overall structure of the pressure relief valve. The threaded connection tightly fits the valve cover 1 and the valve body 3 through the tight engagement between the threads. Under the vibration and pressure shock generated by the normal operation of the system, it can effectively prevent the valve cover 1 from loosening and shifting, and maintain the structural integrity of the pressure relief valve. Sealed welding integrates the valve cover 1 and the valve body 3 into one, forming a solid whole. In the face of extreme working conditions, such as high temperature, high pressure and corrosive media erosion that may be encountered in chemical production, it can still remain stable, ensuring the normal operation of precision components such as the internal valve core, greatly extending the service life of the pressure relief valve.

[0044] A sealing gasket 2 is connected to the connection between the valve cover 1 and the valve body 3 .

[0045] The advantages of the above settings are:

[0046] In terms of ensuring sealing, the gasket 2 plays a key role. Although the valve cover 1 and the valve body 3 strive for high precision during the manufacturing process, the actual processed surface is inevitably prone to subtle unevenness that is difficult to detect with the naked eye. With its flexibility and strong fit, the gasket 2 can tightly fill these microscopic gaps, just like putting a layer of tight "protective clothing" on the connection part, effectively preventing the gas from leaking from the tiny gap between the valve cover and the valve body under pressure. This is especially important in situations where the system pressure fluctuates frequently. Whether it is gas trying to escape under high pressure or possible invasion of external gas under negative pressure, the gasket 2 can hold its ground and ensure that the pressure environment inside the pressure relief valve is always maintained at a stable level, laying a solid foundation for precise pressure regulation.

[0047] Considering the ability to cope with complex working conditions, the gasket 2 also performs well. For example, in high-temperature conditions, which are common in heat exchange systems in steel smelters, as the system heats up, the valve cover 1 and the valve body 3 will change in size due to thermal expansion and contraction, and the gap in the connection will also change accordingly. At this time, the elastic properties of the gasket 2 are highlighted, and it can dynamically adapt to this dimensional change, continue to maintain a good sealing effect, and prevent the risk of leakage caused by temperature fluctuations. In some harsh chemical environments, such as areas with strong acid and alkali mist in chemical production, the gasket 2 also has an isolation and protection effect, preventing corrosive substances from corroding the metal at the connection, delaying the metal corrosion process, thereby extending the overall service life of the pressure relief valve, reducing the frequency of equipment maintenance, and ensuring stable system operation.

[0048] From the perspective of shock absorption and noise reduction performance, the gasket 2 also plays an important role. When the pressure relief valve is working, the flow of the internal fluid and the pressure change will cause the valve body to vibrate. These vibration waves can easily propagate outward through the connection between the valve cover 1 and the valve body 3, causing noise interference and possibly causing damage to surrounding equipment. Because the gasket 2 has certain damping characteristics, it can absorb and transform part of the vibration energy, effectively reducing the vibration amplitude of the connection part, just like installing a "buffer" for the vibration, reducing noise generation. This not only optimizes the acoustic environment in the workplace, but also avoids fatigue damage to the pressure relief valve's own structure and adjacent equipment caused by long-term vibration, further improving the reliability of system operation.

[0049] Example 3

[0050] like Figure 1-4 As shown, a pressure relief valve comprises a valve cover 1, one side of the valve cover 1 is connected with an air inlet and outlet 10, a valve body 3 is connected inside the valve cover 1, the top of the valve body 3 is connected with a valve top cover 9, a valve body sealing gasket 6 is connected between the valve body 3 and the valve top cover 9, a pressure-compensating valve core 5 is connected to the bottom of the valve body sealing gasket 6, the pressure-compensating valve core 5 is connected to the valve body 3 through a pressure-compensating spring 4, a pressure-relief valve core 7 is connected to the top of the valve body sealing gasket 6, and the pressure-relief valve core 7 is connected to the valve top cover 9 through a pressure-relief spring 8.

[0051] The pressure-compensating valve core 5 and the pressure-relief valve core 7 are respectively connected with the valve body sealing gasket 6 by using conical surface sealing or high-precision plane sealing.

[0052] The advantages of the above settings are:

[0053] Excellent sealing performance

[0054] Conical surface seal: When the conical surface seal is adopted, a line contact seal is formed between the pressure-compensating valve core 5 and the pressure-relief valve core 7 and the valve body gasket 6. This sealing method can withstand higher pressures with a smaller contact area. For example, when the system pressure is high, the valve core with conical surface seal can evenly distribute the pressure on the valve body gasket 6 through a smaller sealing contact line, effectively preventing medium leakage. Just like a cone is embedded in a corresponding conical hole, as the pressure increases, the contact between the two becomes closer, and the greater the pressure, the better the sealing effect.

[0055] High-precision plane seal: For high-precision plane seal, the fit accuracy between the pressure-compensating valve core 5 and the pressure-relief valve core 7 and the valve body gasket 6 is extremely high. Plane seal can provide a stable sealing effect, and when the system pressure changes, especially under low pressure conditions, it can ensure the sealing between the valve core and the gasket. This is because the high-precision plane processing makes the gap between the two extremely small, which can effectively block the passage of the medium, just like two pieces of high-precision polished glass fit tightly together, and it is difficult for the medium to pass through the gap between them.

[0056] Precise pressure control

[0057] Sensitive response: Whether it is a conical seal or a high-precision flat seal, the valve core can respond sensitively to pressure changes. Taking the pressure relief valve core 7 as an example, when the system pressure rises to a level that requires pressure relief, this tight sealing connection method can ensure that the pressure relief valve core 7 can accurately open and release excess pressure after overcoming the resistance of the pressure relief spring 8. Because the sealing connection is highly accurate, the movement of the valve core will not be disturbed by additional resistance, making pressure control more precise. Similarly, during the pressure replenishment process, the pressure replenishment valve core 5 can also open promptly and accurately according to the reduction in system pressure to introduce external gas to supplement the pressure.

[0058] Maintaining stable pressure: Through precise sealing connections, the amount of pressure release and replenishment can be better controlled during the pressure regulation process. For example, in a thermal management system, when the coolant temperature changes and causes pressure fluctuations, this sealing connection method can enable the pressure relief valve to accurately maintain the pressure within the set normal range, avoiding excessive pressure causing damage to the pipeline or too low pressure affecting the normal operation of the system.

[0059] Extend service life

[0060] Reduce wear: A good sealing connection can reduce friction and wear between the valve core and the gasket. The contact mode of the conical seal and the high-precision plane seal makes the valve core more evenly stressed during movement, avoiding excessive wear caused by excessive local pressure. For example, during frequent pressure regulation, if the sealing connection between the valve core and the gasket is not good, eccentric wear is likely to occur. This precise sealing method enables the valve core to move smoothly on the gasket, extending the service life of the valve core and the gasket.

[0061] Good anti-fatigue performance: Since the sealed connection can effectively prevent the leakage of the medium and can work stably when the pressure changes, the stress changes on the valve core and the sealing gasket are relatively regular. This makes them have better anti-fatigue performance and can withstand multiple pressure adjustment cycles without seal failure during long-term use, reducing equipment failure and maintenance costs caused by damage to sealing components.

[0062] The valve top cover 9 is fixed to the top of the valve body 3 by means of threads or buckles.

[0063] The advantages of the above settings are:

[0064] Installation convenience

[0065] Threaded fixing: When the valve top cover 9 and the valve body 3 are fixed by thread, this connection method has obvious advantages during the installation process. Just like the connection of screws and nuts we use in daily life, the installer can rotate the valve top cover 9 to gradually tighten it along the thread of the valve body 3. This method is simple to operate and only requires conventional tools such as wrenches to complete the installation. Moreover, during the installation process, it is relatively easy to control the tightness of the installation to ensure that the connection between the valve top cover 9 and the valve body 3 is tight and appropriate. For example, on a large-scale production assembly line, workers can quickly complete the installation of the valve top cover 9, improving production efficiency.

[0066] Buckle fixing: The buckle fixing method is simpler and faster. The buckle structure is usually elastic. When installing, you only need to align the valve top cover 9 with the valve body 3, and then apply appropriate pressure to make the buckle clamp the corresponding part to complete the fixation. This method does not require complex tools and can be operated by hand. In some occasions where the installation speed is extremely high, or when the valve top cover 9 needs to be frequently disassembled and installed for maintenance, the buckle fixing method can greatly save time and labor costs.

[0067] Structural stability

[0068] Stability of threaded connection: Threaded connection can provide reliable axial and circumferential fixing force. During the operation of the system, whether it is subjected to axial force generated by internal pressure changes or circumferential force caused by external vibration and other factors, the threaded connection can effectively resist these forces and keep the valve top cover 9 in a stable position on the top of the valve body 3. For example, in a thermal management system, when the flow of coolant causes the pipeline to vibrate, the valve top cover 9 fixed by threads will not loosen or shift easily, thereby ensuring the normal working environment of the internal valve core and other components, and avoiding the displacement of the valve top cover 9 affecting the performance of the pressure relief valve.

[0069] Stability guarantee of snap connection: Although snap connection seems to be a relatively simple fixing method, it can also provide sufficient stability if it is designed properly. The snap connection is usually fixed by its own elastic deformation. After correct installation, the snap connection can tightly hold the corresponding part of the valve body 3 to prevent the valve top cover 9 from moving in the vertical and horizontal directions. In addition, some snap connection designs also use multiple locking mechanisms to further enhance the stability of the connection and ensure that the valve top cover 9 can be firmly fixed on the valve body 3 under complex working conditions.

[0070] Easy maintenance and repair

[0071] Easy thread disassembly: For the valve top cover 9 fixed by thread, the disassembly process is relatively simple when the pressure relief valve needs to be maintained or repaired. It can be easily removed from the valve body 3 by simply rotating the valve top cover 9 in the opposite direction using a wrench or other tools. This allows maintenance personnel to easily access internal valve cores, springs and other components for inspection, cleaning, replacement and other operations. For example, when the pressure relief valve core 7 or the pressure compensation valve core 5 fails, maintenance personnel can quickly open the valve top cover 9 to repair or replace the failed components, reducing the downtime of the equipment.

[0072] Flexibility of snap-on disassembly: The valve top cover 9 fixed by the snap-on is also convenient to disassemble. Usually, the valve top cover 9 can be removed from the valve body 3 by simply finding the release point of the snap-on and applying appropriate external force to restore the elastic deformation of the snap-on. This flexibility enables the valve top cover 9 to be opened quickly in some emergency situations or when internal components need to be quickly checked, which facilitates maintenance work.

[0073] The examples given in the present invention are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A pressure relief valve, characterized in that: The invention comprises a valve cover (1), one side of which is connected to an air inlet and outlet (10), a valve body (3) is connected inside the valve cover (1), the top of the valve body (3) is connected to a valve top cover (9), a valve body sealing gasket (6) is connected between the valve body (3) and the valve top cover (9), the bottom of the valve body sealing gasket (6) is connected to a pressure-compensating valve core (5), the pressure-compensating valve core (5) is connected to the valve body (3) via a pressure-compensating spring (4), the top of the valve body sealing gasket (6) is connected to a pressure-relief valve core (7), and the pressure-relief valve core (7) is connected to the valve top cover (9) via a pressure-relief spring (8).

2. A pressure relief valve according to claim 1, characterized in that: The valve cover (1) and the air inlet and outlet (10) are manufactured in one piece.

3. A pressure relief valve according to claim 2, characterized in that: The valve cover (1) is connected to the valve body (3) via threads or sealing welding.

4. A pressure relief valve according to claim 3, characterized in that: A sealing gasket (2) is connected to the connection between the valve cover (1) and the valve body (3).

5. A pressure relief valve according to claim 1, characterized in that: The pressure-compensating valve core (5) and the pressure-relieving valve core (7) are respectively connected to the valve body sealing gasket (6) by using conical surface sealing or high-precision flat surface sealing.

6. A pressure relief valve according to claim 1, characterized in that: The valve top cover (9) is fixed to the top of the valve body (3) by means of threads or buckles.

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