Pressure release valve and sealing equipment

Abstract

The utility model relates to the technical field of pressure release valve equipment, in particular to a pressure release valve and sealing equipment. The pressure relief valve comprises a valve body, a valve cover and a sealing piece, the valve body is provided with a through pressure relief channel, the inner walls, close to the two ends, of the pressure relief channel are provided with a supporting piece and a bearing part respectively, the valve cover movably covers one end of the pressure relief channel, and the sealing piece movably covers the other end of the pressure relief channel; the pressure relief valve further comprises an elastic piece and a connecting piece which are arranged between the valve deck and the sealing piece, and the connecting piece enables the valve deck and the sealing piece to synchronously move in the axial direction of the pressure relief channel. And one end of the elastic piece is connected with the supporting piece and the other end is connected with the sealing piece. Through the design of the elastic piece and the connecting piece, the pressure relief channel can be rapidly opened when pressure is too large, and the sealing piece and the valve deck can automatically reset when pressure relief is completed. When the pressure release valve does not release pressure, the valve cover, the sealing piece and the inner wall of the pressure release channel define a sealed protection cavity, and parts in the pressure release valve are effectively protected.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure relief valve equipment, and in particular to a pressure relief valve and sealing device. Background Technology

[0002] In the industrial sector, pressure relief valves are crucial safety components in sealing equipment. Their primary function is to automatically release pressure when the equipment pressure exceeds a set value, ensuring safe operation. Currently, common pressure relief valves exhibit certain sealing performance defects within the valve body when not in use. Under complex operating conditions such as high temperature, high pressure, and corrosive media, existing sealing structures struggle to consistently provide reliable sealing, necessitating frequent maintenance and component replacement. This not only increases equipment maintenance costs and complexity but may also lead to prolonged downtime, impacting production efficiency.

[0003] Therefore, the insufficient sealing performance of the internal valve body of existing pressure relief valves when no pressure is released has become a major bottleneck restricting the overall performance improvement of sealing equipment and the safe and efficient operation of industrial production. There is an urgent need to develop a new type of pressure relief valve that can effectively solve this problem. Utility Model Content

[0004] To address the technical problem of poor sealing performance inside the valve body of existing pressure relief valves, this utility model provides a pressure relief valve and a sealing device.

[0005] The present invention provides a pressure relief valve, comprising a valve body, a valve cover, and a seal. The valve body has a through pressure relief channel. Support members and load-bearing portions are respectively provided on the inner walls of the pressure relief channel near both ends. The valve cover movably seals one end of the pressure relief channel on the side of the support member away from the load-bearing portion. The seal movably seals the other end of the pressure relief channel on the side of the load-bearing portion near the support member. The pressure relief valve further includes an elastic element and a connecting element disposed between the valve cover and the seal. One end of the connecting element is connected to the seal, and the other end passes through the support member and is connected to the valve cover, so that the valve cover and the seal move synchronously in the axial direction of the pressure relief channel. One end of the elastic element abuts or connects to the support member, and the other end abuts or connects to the seal.

[0006] Preferably, the bearing portion is provided with a first sealing groove on the side facing the support member, a first sealing ring is installed in the first sealing groove, and the sealing member is fitted to the first sealing ring.

[0007] Preferably, a second sealing groove is provided on the side of the bearing part facing away from the support member, and a second sealing ring is fixed in the second sealing groove.

[0008] Preferably, the circumferential edge of the valve cover extends axially along the pressure relief channel to form an annular cover portion, which covers and seals the end opening of the pressure relief channel.

[0009] Preferably, the seal, connector, and pressure relief channel are arranged coaxially.

[0010] Preferably, the sealing member is provided with a first fixing structure that matches one end of the elastic member, and the support member is provided with a second fixing structure that matches the other end of the elastic member. The two ends of the elastic member are respectively connected to or abut against the first fixing structure and the second fixing structure.

[0011] Preferably, the support member has a hollow structure.

[0012] Preferably, the side of the load-bearing part facing the support member is provided with a ramp structure.

[0013] Preferably, a protective plate is provided between the valve cover and the support member, and the protective plate is fixedly connected to the valve cover.

[0014] To solve the above-mentioned technical problems, this utility model provides another technical solution as follows: a sealing device, including a sealing box and a pressure relief valve as described above, the sealing box has an internal cavity, the sealing box has an opening that connects the cavity to the outside, and the pressure relief valve is located at the opening and closes the opening.

[0015] Compared with the prior art, the pressure relief valve and sealing device provided by this utility model have the following beneficial effects:

[0016] 1. The pressure relief valve provided by this utility model has its two ends of the connector connected to the sealing element and the valve cover respectively, so that the valve cover and the sealing element move synchronously in the axial direction of the pressure relief channel. When the pressure on one side of the sealing element is too high, the pressure acts on the sealing element, causing it to move towards the valve cover. At the same time, due to the action of the connector, the valve cover will also move synchronously, so that the two ends of the pressure relief channel are no longer sealed by the sealing element and the valve cover, and the pressure is released. The two ends of the elastic element are connected to the support element and the sealing element respectively. During pressure relief, the elastic element is compressed. When the pressure relief is completed, the restoring force of the elastic element causes the sealing element to move away from the valve cover. At the same time, the connector drives the valve cover to move synchronously, so that the sealing element and the valve cover return to their original positions to seal the pressure relief channel. The design of the elastic element and the connector enables the pressure relief channel to open quickly when the pressure is too high, and the sealing element and the valve cover to automatically reset and seal the pressure relief channel when the pressure relief is completed. This design effectively enhances the sealing performance of the pressure relief valve when it is not depressurizing, reducing the risk of media leakage and ensuring stable pressure in the sealing equipment. After depressurization, the elastic element automatically returns the seal to its sealing position, achieving automatic valve closure. This reduces equipment damage caused by excessive pressure and extends the equipment's service life. Furthermore, when the pressure relief valve is not depressurizing, the seal and valve cover seal both ends of the pressure relief channel, forming a sealed protective cavity together with the inner wall of the channel. This effectively protects the internal components of the pressure relief valve, such as the elastic element and connecting parts, preventing the entry of dust, moisture, or corrosive substances from the external environment, thus ensuring the stability and long-term reliability of the pressure relief valve.

[0017] 2. The pressure relief valve provided by this utility model has a first sealing groove on the side of the bearing part facing the support member, and a first sealing ring is installed in the first sealing groove. The sealing element is set to fit the first sealing ring. This design further enhances the sealing effect between the valve body and the sealing element, improves the reliability of the seal, and reduces the possibility of medium leakage from the gap between the bearing part and the sealing element.

[0018] 3. The pressure relief valve provided by this utility model has a second sealing groove on the side of the bearing part facing away from the support member, and a second sealing ring is fixed in the second sealing groove. This design can seal the external connection of the valve body, effectively prevent external impurities from entering and internal media from being contaminated, and enhance the overall sealing performance and structural stability of the pressure relief valve.

[0019] 4. The pressure relief valve provided by this utility model has a valve cover whose circumferential edge extends along the axial direction of the pressure relief channel to form an annular covering portion. This annular covering portion completely covers and seals the end opening of the pressure relief channel. Compared with traditional contact seals or valve cover embedded seals, this encapsulation-type sealing structure can more effectively prevent the infiltration of external impurities, fundamentally reducing the problem of valve opening pressure rise caused by the adhesion of impurities such as mud, ensuring that the pressure relief valve can work normally within the set pressure range, and enhancing the stability and durability of the pressure relief valve.

[0020] 5. The pressure relief valve provided by this utility model has its sealing components, connecting components, and pressure relief channel arranged coaxially, which can make the force on each component more even, avoid poor sealing, component wear, or weakened pressure relief effect caused by the center of gravity shift, and improve the sealing effect and service life of the pressure relief valve.

[0021] 6. The pressure relief valve provided by this utility model has a first fixing structure and a second fixing structure that fix both ends of the elastic element, making the installation of the elastic element more stable and the force more uniform. This prevents the elastic element from deforming unevenly during compression or stretching, and at the same time ensures that the elastic element will not shift or fall off during operation. This ensures that the elastic element provides a stable force to the sealing element, thereby maintaining good sealing performance.

[0022] 7. The pressure relief valve provided by this utility model has a hollow structure in its support component. On the one hand, the hollow structure can reduce its own weight and material usage, while not affecting its support and positioning function for the elastic component. Under the premise of ensuring the performance of the pressure relief valve, it reduces production costs and equipment weight. On the other hand, the hollow structure can further reduce the obstruction of the gas by the support component during pressure relief, so that the pressure relief valve can achieve rapid pressure relief and reduce the damage caused to the support component by the rapid impact of the gas.

[0023] 8. The pressure relief valve provided by this utility model has a ramp structure on the side of the bearing part facing the support member. This design helps to guide the flow of the medium and quickly relieve pressure. At the same time, it can reduce the accumulation and impact of the medium in the bearing part, reduce the wear of impurities on the seal, and extend the service life of the seal.

[0024] 9. The pressure relief valve provided by this utility model has a protective plate between the valve cover and the support. The protective plate is generally a metal plate, which can effectively reduce the wear caused to the valve cover by the internal medium impacting the valve cover during pressure relief, protect the valve cover, and extend the service life of the valve cover.

[0025] 10. This utility model also provides a sealing device, including a sealing box and a pressure relief valve as described above. The sealing box has an internal receiving cavity, and the sealing box has an opening communicating with the outside. The pressure relief valve is located at the opening and closes the opening. This sealing device has the same beneficial effects as the pressure relief valve described above, and will not be described again here. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional schematic diagram of the pressure relief valve provided in the first embodiment of this utility model.

[0028] Figure 2 This is a cross-sectional schematic diagram of the pressure relief valve provided in the first embodiment of this utility model.

[0029] Figure 3 This is an exploded schematic diagram of the pressure relief valve provided in the first embodiment of this utility model.

[0030] Figure 4 This is a three-dimensional schematic diagram of the valve body of the pressure relief valve provided in the first embodiment of this utility model. Figure 1 .

[0031] Figure 5 This is a three-dimensional schematic diagram of the valve body of the pressure relief valve provided in the first embodiment of this utility model. Figure 2 .

[0032] Figure 6 yes Figure 2 A magnified view of A in the middle.

[0033] Figure 7 This is a schematic diagram of the frame of the sealing device provided in the second embodiment of this utility model.

[0034] Explanation of reference numerals in the attached diagram:

[0035] 1. Pressure relief valve; 2. Sealing device;

[0036] 10. Valve body; 11. Valve cover; 12. Seal; 13. Protective cavity; 14. Support; 15. Elastic element; 16. Connector; 17. Protective plate;

[0037] 100. Pressure relief channel; 101. Bearing part; 102. First sealing groove; 103. First sealing ring; 104. Second sealing groove; 105. Second sealing ring; 106. Sloping structure; 110. Annular covering part; 130. First fixing structure; 140. Second fixing structure; 150. Hollowed-out structure. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0039] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0040] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0041] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0042] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0043] Please combine Figures 1 to 3 The first embodiment of this utility model provides a pressure relief valve 1, including a valve body 10, a valve cover 11 and a sealing element 12. The valve body 10 is provided with a through pressure relief channel 100. The inner walls of the pressure relief channel 100 near both ends are respectively provided with a support member 14 and a bearing part 101. The valve cover 11 can movably cover one end of the pressure relief channel 100 on the side of the support member 14 away from the bearing part 101. The sealing element 12 can movably cover the other end of the pressure relief channel 100 on the side of the bearing part 101 near the support member 14.

[0044] The pressure relief valve 1 also includes an elastic element 15 and a connecting element 16 disposed between the valve cover 11 and the seal 12. One end of the connecting element 16 is connected to the seal 12, and the other end passes through the support 14 and is connected to the valve cover 11, so that the valve cover 11 and the seal 12 move synchronously in the axial direction of the pressure relief channel 100. One end of the elastic element 15 abuts or connects to the support 14, and the other end abuts or connects to the seal 12.

[0045] Understandably, the design of the valve cover 11 and the seal 12 being movably connected to the valve body 10 can effectively simplify the structure of the valve body 10, allow the valve cover 11 and the seal 12 to be manufactured separately, reduce production difficulty and cost, and facilitate maintenance.

[0046] The sealing element 12 and the valve cover 11 are respectively installed at both ends of the pressure relief channel 100. When the pressure relief valve 1 is not relieving pressure, the sealing element 12 and the valve cover 11 respectively seal both ends of the pressure relief channel 100, forming a sealed protective cavity 13 together with the inner wall of the pressure relief channel 100. This cavity effectively protects the internal components of the pressure relief valve 1, such as the elastic element 15 and the connecting element 16, preventing dust, moisture or corrosive substances from the external environment from entering, thus ensuring the stability and long-term reliability of the pressure relief valve 1.

[0047] Understandably, the two ends of the connector 16 are connected to the seal 12 and the valve cover 11 respectively, so that the valve cover 11 and the seal 12 move synchronously in the axial direction of the pressure relief channel 100. When the pressure on one side of the seal 12 is too high, the pressure acts on the seal 12, causing the seal 12 to move towards the valve cover 11. At the same time, due to the action of the connector 16, the valve cover 11 will also move synchronously. This makes the two ends of the pressure relief channel 100 no longer sealed by the seal 12 and the valve cover 11, and the pressure is released. Since the two ends of the elastic member 15 are connected to the support member 14 and the seal 12 respectively, the elastic member 15 is compressed during pressure relief. When the pressure relief is completed, the restoring force of the elastic member 15 causes the seal 12 to move away from the valve cover 11. At the same time, the connector 16 drives the valve cover 11 to move synchronously, so that the seal 12 and the valve cover 11 return to their original positions to seal the pressure relief channel 100.

[0048] Therefore, the design of the elastic element 15 and the connecting element 16 enables the pressure relief channel 100 to open quickly when the pressure is too high. When the pressure relief is completed, the sealing element 12 and the valve cover 11 automatically reset to seal the pressure relief channel 100. This effectively enhances the sealing performance of the pressure relief valve 1 when it is not depressurized, reduces the risk of media leakage, and ensures the pressure stability of the sealing device 2. After the pressure relief is completed, the elastic force of the elastic element 15 can automatically push the sealing element 12 back to the sealing position, realizing the automatic closure of the valve. This can reduce equipment damage caused by excessive pressure and extend the service life of the equipment.

[0049] Understandably, in this embodiment, the connection method between the connector 16 and the seal 12 and valve cover 11 is not specifically limited, as long as the connector 16 enables the seal 12 and valve cover 11 to be controlled in conjunction. For example, snap-fit ​​protrusions or snap-fit ​​grooves can be provided on the seal 12 and valve cover 11, and corresponding snap-fit ​​grooves or snap-fit ​​protrusions can be provided at both ends of the connector 16, so that the connector 16 is interference-fitted with the seal 12 and valve cover 11. Threaded connections, screw fixation, adhesive bonding, and other connection methods can also be used.

[0050] Understandably, in this embodiment, the specific shape and size of the elastic element 15 are not specifically limited, and can be designed according to the specific valve opening pressure requirements.

[0051] Specifically, in this embodiment, the elastic element 15 is a spring, and the connecting element 16 is cylindrical. The connecting element 16 is located in the middle of the spring and its two ends are respectively connected to the support element 14 and the sealing element 12, which can improve the compactness of the internal layout and prevent the spring from falling off or shifting.

[0052] Understandably, in this embodiment, the support member 14 can be integrally formed with the valve body 10 or it can be a separate component. Furthermore, this embodiment does not limit the specific method of fixing the support member 14 to the valve body 10, and it can be a connection method such as laser welding, interference fit or snap fastening.

[0053] Understandably, in this embodiment, the support portion 101 is the portion of the valve body 10 extending toward the interior of the pressure relief channel 100, and can be integrally provided with the valve body 10.

[0054] Understandably, the protective cavity 13 not only protects the elastic element 15 from external interference, but also, due to the proximity of the support member 14 to the valve cover 11, provides ample space within the protective cavity 13. This allows for the placement of a larger elastic element 15, which provides a more stable force output, preventing force fluctuations or instability caused by an excessively small elastic element 15. This stability plays a crucial role in the opening pressure of the pressure relief valve 1, helping to ensure accurate and reliable valve opening within the set pressure range. A larger elastic element 15 not only exhibits better force stability but also potentially reduces the need for precision-machined and frequently replaced small elastic elements 15, thereby lowering overall manufacturing costs. Furthermore, the larger elastic element 15 exhibits a more uniform stress distribution, making it less prone to fatigue or damage during long-term use.

[0055] Specifically, in this embodiment, the elastic element 15 is a spring, and the connecting post is located in the middle of the spring, so that the two will not interfere with each other when they are working.

[0056] Please combine further Figure 4 and Figure 5The bearing part 101 is provided with a first sealing groove 102 on the side facing the support member 14, and a first sealing ring 103 is installed in the first sealing groove 102. The sealing member 12 is fitted to the first sealing ring 103.

[0057] Understandably, the support portion 101 supports the seal 12, thereby sealing the pressure relief channel 100. The first sealing groove 102 and the first sealing ring 103 match, further enhancing the sealing effect of the seal 12 on the pressure relief channel 100, improving the reliability of the seal, reducing the possibility of medium leakage from the gap between the support portion 101 and the seal 12, and simultaneously enhancing the protective function of the protective cavity 13.

[0058] Understandably, the first sealing groove 102 should be arranged around the pressure relief channel 100 so that the first sealing ring 103 and the sealing element 12 cooperate to achieve an all-round seal on the pressure relief channel 100.

[0059] Furthermore, a second sealing groove 104 is provided on the side of the bearing part 101 facing away from the support member 14, and a second sealing ring 105 is fixed in the second sealing groove 104.

[0060] Understandably, the design of the second sealing groove 104 and the second sealing ring 105 can seal the connection between the valve body 10 and the external equipment, effectively preventing external impurities from entering and causing internal media contamination, thus enhancing the overall sealing performance and structural stability of the pressure relief valve 1. The second sealing groove 104 should also be arranged around the pressure relief channel 100, and the second sealing groove 104 can also be arranged on the valve body 10.

[0061] In this embodiment, the specific shape of the second sealing ring 105 is not limited. Depending on specific needs, protrusions or grooves can be further provided on the second sealing ring 105 to give it a certain degree of air permeability.

[0062] Furthermore, a ramp structure 106 is provided on the side of the bearing part 101 facing the support member 14.

[0063] Understandably, the ramp structure 106 is positioned close to the first sealing groove 102, causing the inner diameter of the pressure relief channel 100 inlet to gradually increase. Here, the inlet refers to the end of the pressure relief channel 100 closest to the seal 12. The ramp structure 106 helps guide the flow of the medium, quickly relieves pressure, and at the same time reduces the accumulation and impact of the medium in the bearing portion 101, reduces the wear of impurities on the seal 12, and extends the service life of the seal 12.

[0064] In this embodiment, the length and inclination of the 106-degree slope structure are not specifically limited.

[0065] Please refer to further information. Figure 6The circumferential edge of the valve cover 11 extends along the axial direction of the pressure relief channel 100 to form an annular cover 110, which completely covers and seals the end opening of the pressure relief channel 100.

[0066] Understandably, this encapsulated sealing structure, compared to traditional contact seals or valve cover 11 embedded seals, can more effectively prevent the infiltration of external impurities (such as mud), fundamentally reducing the problem of valve opening pressure rise caused by the adhesion of impurities such as mud, ensuring that the pressure relief valve 1 can work normally within the set pressure range, and enhancing the stability and durability of the pressure relief valve 1.

[0067] Furthermore, the seal 12, the connector 16, and the pressure relief channel 100 are coaxially arranged.

[0068] Understandably, this design allows for more even force distribution on each component, avoiding poor sealing, component wear, or reduced pressure relief effect caused by center of gravity shift, thus improving the sealing effect and service life of pressure relief valve 1.

[0069] Furthermore, the sealing element 12, connecting element 16, elastic element 15, pressure relief channel 100, support element 14 and valve cover 11 are all coaxially arranged, making the overall layout of the pressure relief valve 1 more uniform and further improving its reliability and service life.

[0070] Please continue reading. Figure 2 Furthermore, the sealing member 12 is provided with a first fixing structure 130 that matches one end of the elastic member 15, and the support member 14 is provided with a second fixing structure 140 that matches the other end of the elastic member 15. The two ends of the elastic member 15 are respectively connected to or abut against the first fixing structure 130 and the second fixing structure 140.

[0071] Understandably, the first fixing structure 130 and the second fixing structure 140 fix both ends of the elastic element 15, making the installation of the elastic element 15 more stable and the force more uniform, preventing the elastic element 15 from deforming unevenly during compression or tension, and ensuring that the elastic element 15 will not shift or fall off during operation. This ensures that the elastic element 15 provides a stable force to the sealing element 14, further improving the tightness of the fit between the sealing element 12 and the pressure relief channel 100, thereby maintaining good sealing performance.

[0072] Specifically, in this embodiment, the first fixing structure 130 is a snap-fit ​​structure in which the sealing member 12 surrounds the elastic member 15 circumferentially, with one end of the elastic member 15 snapped into the snap-fit ​​structure; the second fixing structure 140 is a support step in which the support member 14 surrounds the elastic member 15 circumferentially, with the other end of the elastic member 15 abutting against the inner wall of the support step. The snap-fit ​​structure and the support step structure are simple and reliable, limiting and fixing the elastic member 15, ensuring that the elastic member 15 will not shift or fall off during operation.

[0073] Please continue reading. Figure 3 The support member 14 is provided with a hollow structure 150.

[0074] Understandably, on the one hand, the hollow structure 150 can reduce its own weight and material usage, while not affecting its support and positioning function for the elastic element 15. Under the premise of ensuring the performance of the pressure relief valve 1, it reduces production costs and equipment weight. On the other hand, the hollow structure 150 can further reduce the obstruction of the gas by the support element 14 during pressure relief, enabling the pressure relief valve 1 to achieve rapid pressure relief and reducing the damage caused by the rapid impact of gas to the support element 14.

[0075] Furthermore, a protective plate 17 is provided between the valve cover 11 and the support member 14, and the protective plate 17 is fixedly connected to the valve cover 11.

[0076] Understandably, the protective plate 17 has a through hole corresponding to the connecting piece 16, and can be fixedly connected to the valve cover 11 by interference fit. The protective plate 17 is generally a metal plate, such as stainless steel. The protective plate 17 can effectively reduce the wear caused to the valve cover 11 by the internal medium impacting the valve cover 11 during pressure relief, protect the valve cover 11, and extend the service life of the valve cover 11.

[0077] Please see Figure 7 The second embodiment of this utility model provides a sealing device 2, including a sealing box and the aforementioned pressure relief valve 1. The sealing box has an internal cavity and an opening on the sealing box that connects the cavity to the outside. The pressure relief valve 1 is located at the opening and closes the opening.

[0078] Understandably, the sealing device 2 has the same beneficial effects as the pressure relief valve 1 described above, and will not be repeated here.

[0079] Compared with the prior art, the pressure relief valve and sealing device provided by this utility model have the following beneficial effects:

[0080] 1. The pressure relief valve provided by this utility model has its two ends of the connector connected to the sealing element and the valve cover respectively, so that the valve cover and the sealing element move synchronously in the axial direction of the pressure relief channel. When the pressure on one side of the sealing element is too high, the pressure acts on the sealing element, causing it to move towards the valve cover. At the same time, due to the action of the connector, the valve cover will also move synchronously, so that the two ends of the pressure relief channel are no longer sealed by the sealing element and the valve cover, and the pressure is released. The two ends of the elastic element are connected to the support element and the sealing element respectively. During pressure relief, the elastic element is compressed. When the pressure relief is completed, the restoring force of the elastic element causes the sealing element to move away from the valve cover. At the same time, the connector drives the valve cover to move synchronously, so that the sealing element and the valve cover return to their original positions to seal the pressure relief channel. The design of the elastic element and the connector enables the pressure relief channel to open quickly when the pressure is too high, and the sealing element and the valve cover to automatically reset and seal the pressure relief channel when the pressure relief is completed. This design effectively enhances the sealing performance of the pressure relief valve when it is not depressurizing, reducing the risk of media leakage and ensuring stable pressure in the sealing equipment. After depressurization, the elastic element automatically returns the seal to its sealing position, achieving automatic valve closure. This reduces equipment damage caused by excessive pressure and extends the equipment's service life. Furthermore, when the pressure relief valve is not depressurizing, the seal and valve cover seal both ends of the pressure relief channel, forming a sealed protective cavity together with the inner wall of the channel. This effectively protects the internal components of the pressure relief valve, such as the elastic element and connecting parts, preventing the entry of dust, moisture, or corrosive substances from the external environment, thus ensuring the stability and long-term reliability of the pressure relief valve.

[0081] 2. The pressure relief valve provided by this utility model has a first sealing groove on the side of the bearing part facing the support member, and a first sealing ring is installed in the first sealing groove. The sealing element is set to fit the first sealing ring. This design further enhances the sealing effect between the valve body and the sealing element, improves the reliability of the seal, and reduces the possibility of medium leakage from the gap between the bearing part and the sealing element.

[0082] 3. The pressure relief valve provided by this utility model has a second sealing groove on the side of the bearing part facing away from the support member, and a second sealing ring is fixed in the second sealing groove. This design can seal the external connection of the valve body, effectively prevent external impurities from entering and internal media from being contaminated, and enhance the overall sealing performance and structural stability of the pressure relief valve.

[0083] 4. The pressure relief valve provided by this utility model has a valve cover whose circumferential edge extends along the axial direction of the pressure relief channel to form an annular covering portion. This annular covering portion completely covers and seals the end opening of the pressure relief channel. Compared with traditional contact seals or valve cover embedded seals, this encapsulation-type sealing structure can more effectively prevent the infiltration of external impurities, fundamentally reducing the problem of valve opening pressure rise caused by the adhesion of impurities such as mud, ensuring that the pressure relief valve can work normally within the set pressure range, and enhancing the stability and durability of the pressure relief valve.

[0084] 5. The pressure relief valve provided by this utility model has its sealing components, connecting components, and pressure relief channel arranged coaxially, which can make the force on each component more even, avoid poor sealing, component wear, or weakened pressure relief effect caused by the center of gravity shift, and improve the sealing effect and service life of the pressure relief valve.

[0085] 6. The pressure relief valve provided by this utility model has a first fixing structure and a second fixing structure that fix both ends of the elastic element, making the installation of the elastic element more stable and the force more uniform. This prevents the elastic element from deforming unevenly during compression or stretching, and at the same time ensures that the elastic element will not shift or fall off during operation. This ensures that the elastic element provides a stable force to the sealing element, thereby maintaining good sealing performance.

[0086] 7. The pressure relief valve provided by this utility model has a hollow structure in its support component. On the one hand, the hollow structure can reduce its own weight and material usage, while not affecting its support and positioning function for the elastic component. Under the premise of ensuring the performance of the pressure relief valve, it reduces production costs and equipment weight. On the other hand, the hollow structure can further reduce the obstruction of the gas by the support component during pressure relief, so that the pressure relief valve can achieve rapid pressure relief and reduce the damage caused to the support component by the rapid impact of the gas.

[0087] 8. The pressure relief valve provided by this utility model has a ramp structure on the side of the bearing part facing the support member. This design helps to guide the flow of the medium and quickly relieve pressure. At the same time, it can reduce the accumulation and impact of the medium in the bearing part, reduce the wear of impurities on the seal, and extend the service life of the seal.

[0088] 9. The pressure relief valve provided by this utility model has a protective plate between the valve cover and the support. The protective plate is generally a metal plate, which can effectively reduce the wear caused to the valve cover by the internal medium impacting the valve cover during pressure relief, protect the valve cover, and extend the service life of the valve cover.

[0089] 10. This utility model also provides a sealing device, including a sealing box and a pressure relief valve as described above. The sealing box has an internal receiving cavity, and the sealing box has an opening communicating with the outside. The pressure relief valve is located at the opening and closes the opening. This sealing device has the same beneficial effects as the pressure relief valve described above, and will not be described again here.

[0090] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure relief valve, characterized in that: The device includes a valve body, a valve cover, and a seal. The valve body has a through pressure relief channel. The inner walls of the pressure relief channel near both ends are respectively provided with a support and a bearing portion. The valve cover can movably cover one end of the pressure relief channel on the side of the support away from the bearing portion. The seal can movably cover the other end of the pressure relief channel on the side of the bearing portion near the support. The pressure relief valve further includes an elastic element and a connecting element disposed between the valve cover and the seal. One end of the connecting element is connected to the seal, and the other end passes through the support and is connected to the valve cover, so that the valve cover and the seal can move synchronously in the axial direction of the pressure relief channel. One end of the elastic element abuts or connects to the support, and the other end abuts or connects to the seal.

2. The pressure relief valve as described in claim 1, characterized in that: The bearing portion is provided with a first sealing groove on the side facing the support member, and a first sealing ring is installed in the first sealing groove. The sealing member is fitted to the first sealing ring.

3. The pressure relief valve as described in claim 1, characterized in that: A second sealing groove is provided on the side of the bearing part facing away from the support member, and a second sealing ring is fixed in the second sealing groove.

4. The pressure relief valve as described in claim 1, characterized in that: The circumferential edge of the valve cover extends axially along the pressure relief channel to form an annular cover portion, which covers and seals the end opening of the pressure relief channel.

5. The pressure relief valve as described in claim 1, characterized in that: The sealing element, the connecting element, and the pressure relief channel are arranged coaxially.

6. The pressure relief valve as described in claim 1, characterized in that: The sealing member is provided with a first fixing structure that matches one end of the elastic member, and the support member is provided with a second fixing structure that matches the other end of the elastic member. The two ends of the elastic member are respectively connected to or abut against the first fixing structure and the second fixing structure.

7. The pressure relief valve as described in claim 1, characterized in that: The support component has a hollow structure.

8. The pressure relief valve as described in claim 2, characterized in that: The bearing portion is provided with a ramp structure on the side facing the support member.

9. The pressure relief valve as described in claim 1, characterized in that: A protective plate is provided between the valve cover and the support member, and the protective plate is fixedly connected to the valve cover.

10. A sealing device, characterized in that: The device includes a sealed box and a pressure relief valve as described in any one of claims 1-9. The sealed box has an internal cavity and an opening that connects the cavity to the outside. The pressure relief valve is located at the opening and closes the opening.

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