Temperature pressure safety valve

Abstract

The utility model relates to the technical field of valves, and discloses a temperature and pressure safety valve which comprises a valve body, and the valve body is provided with a container connector and a first pressure relief opening. The valve seat fixing piece is detachably arranged in the valve body, the valve seat fixing piece is provided with a valve seat part and a fixing part, a hollow inlet is defined by the valve seat part, the container connector is communicated with the first pressure relief opening through the inlet, and the fixing part is arranged in the inlet and formed by the inner wall of the valve seat part extending inwards; the first pressure relief assembly is used for opening / closing the inlet; the temperature sensing element and the first pressure relief assembly are oppositely arranged across the inlet, and the temperature sensing element is used for pushing the first pressure relief assembly to move to open / close the inlet. Due to the fact that the valve body does not need to be integrally formed with the valve seat and the fixing piece which are compact and complex in structure, other better forming modes can be selected, the valve body is easy to machine, the machining efficiency of the valve body can be improved, and the machining cost can be reduced.

Description

Technical Field

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

[0002] The temperature and pressure safety valve mainly includes a valve body, a valve seat, a temperature sensing element, a temperature sensing element fixing component, and a pressure relief assembly. The valve seat and pressure relief assembly are located inside the valve body. The pressure relief assembly fits against the inlet of the valve seat to seal it. The outer shell of the temperature sensing element is fixed to the valve body by the fixing component. The push rod of the temperature sensing element can pass through the valve seat and push open the pressure relief assembly to open the inlet of the valve seat. When the temperature sensing element is affected by the temperature inside the container, the push rod in the temperature sensing element passes through the valve seat and abuts against the pressure relief assembly until it pushes open the pressure relief assembly to open the inlet of the valve seat, thereby connecting the pressure relief port on the valve body and the container interface connected to the container to realize the pressure relief function.

[0003] However, traditional temperature and pressure safety valves often use a one-piece molding process for the valve body, seat, and fasteners. For example, in Australian patent AU618616B, the seat 26 and support bracket 28 are integrally molded with the valve body. Because the overall structure of the valve body and seat is relatively complex, sand casting is required. On the one hand, sand casting results in poor density of the molded valve body, increasing the risk of pinhole leakage and leading to poor manufacturing quality. On the other hand, sand casting is a complex and costly process, resulting in low processing efficiency and significantly increased costs for this one-piece structure. Specifically, sand casting refers to a casting method that produces castings in a sand mold.

[0004] To address the above issues, a temperature and pressure safety valve is urgently needed. Utility Model Content

[0005] This utility model provides a temperature and pressure safety valve, the purpose of which is to reduce the risk of leakage due to pinholes in the valve body, ensure good processing quality of the valve body, and make the processing of the valve body simple and the processing cost low.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A temperature and pressure safety valve includes a valve body, a valve seat fixing member, a first pressure relief assembly, and a temperature sensing element. The valve body has a container inlet and a first pressure relief port. The valve seat fixing member is detachably disposed within the valve body and has a valve seat portion and a fixing portion. The valve seat portion forms a hollow inlet, through which the container inlet and the first pressure relief port communicate. The fixing portion extends inward from the inner wall of the valve seat portion. A pressure relief chamber is formed between the inlet and the first pressure relief port, enclosed by the valve body. The first pressure relief assembly is disposed within the pressure relief chamber of the valve body and abuts against the inlet of the valve seat portion for opening / closing the inlet. The temperature sensing element is disposed opposite to the first pressure relief assembly across the inlet and is used to actuate the first pressure relief assembly.

[0008] As an optional technical solution, the temperature sensing element includes a temperature sensing housing and a push rod. The first end of the push rod is located inside the temperature sensing housing, and the second end extends out of the housing. The second end of the push rod can pass through the inlet of the valve seat and abut against the first pressure relief assembly. When the temperature-sensing medium inside the temperature sensing housing expands in volume due to temperature changes, the push rod is pushed out and pushes the first pressure relief assembly, causing the inlet to open and completing the pressure relief. This allows for timely pressure relief when the temperature inside the container interface is too high.

[0009] As an optional technical solution, the fixing part includes an arc-shaped plate and a support rod. The arc-shaped plate has a snap-fit ​​groove, and the temperature-sensing shell is fixed in the snap-fit ​​groove. The support rod is fixed between the inner wall surface of the valve seat and the outer surface of the arc-shaped plate. Thus, the fixing part can be manufactured integrally with the valve seat, simplifying the manufacturing process. Furthermore, the use of only the support rod for fixing results in less obstruction to the flow channel, ensuring unobstructed flow between the container interface and the valve seat inlet.

[0010] As an optional technical solution, the valve seat has a valve seat body and a threaded head, with the threaded head facing the container interface, and a corresponding internal thread structure formed on the inner wall of the valve body. Thus, the valve body can be tightened and fixed to the inner wall near the container interface by the thread, facilitating installation. Furthermore, the valve seat body faces the first pressure relief assembly, making it easier for the first pressure relief assembly to press and seal.

[0011] As an optional technical solution, a valve seat step is formed at the connection position between the valve seat body and the threaded head, and a corresponding boss is formed on the inner wall of the valve body. A valve seat sealing ring is fitted on the valve seat step. Thus, when the threaded head of the valve seat is tightened onto the inner wall of the valve body, the valve seat step of the valve seat body is also pressed against the boss of the valve body. This allows the valve seat sealing ring to be deformed by compression between the valve seat body and the boss, ensuring the sealing performance of the disassembly and assembly structure between the valve seat fixing component and the valve body.

[0012] As an optional technical solution, the fixing part is set inside the threaded head, so that the fixing part can be integrally formed with the threaded head, resulting in a compact and simple structure.

[0013] As an optional technical solution, the temperature and pressure safety valve further includes a second pressure relief port and a second pressure relief assembly. The second pressure relief port is located on the valve body and communicates with the pressure relief chamber. The second pressure relief assembly is located at the second pressure relief port and is used to switch between connecting / isolating the pressure relief chamber and the second pressure relief port. During the pressure relief process of the first pressure relief assembly, if the pressure in the pressure relief chamber becomes too high due to excessive flow in the pressure relief chamber or blockage of the first pressure relief port, the second pressure relief port and the second pressure relief assembly can assist the first pressure relief assembly in completing the pressure relief more quickly when the medium in the container interface is overpressurized. This allows the excessively pressurized medium in the pressure relief chamber to be released in a timely manner, resulting in a higher pressure relief response speed and better safety for the temperature and pressure safety valve.

[0014] As an optional technical solution, the second pressure relief assembly includes a housing and a pressure-bearing component. The housing is fixed at the second pressure relief port, and a sealing ring is fixed inside the housing. The pressure-bearing component is disposed inside the housing and has a pressure-bearing head and a movable rod. The pressure-bearing head faces the inside of the valve body, and the movable rod passes through the sealing ring and is fixed to the pressure-bearing head. The outer diameter of the pressure-bearing head is larger than the inner diameter of the sealing ring, and the outer diameter of the pressure-bearing head is not larger than the inner diameter of the housing. The second pressure relief assembly can assist the first pressure relief assembly in completing pressure relief more quickly, and can also promptly release the medium with excessive pressure in the valve cavity to avoid the risk of safety accidents such as valve body explosion when the first pressure relief assembly fails.

[0015] As an optional technical solution, the second pressure relief port is arranged opposite to the first pressure relief port. Arranging the first and second pressure relief ports opposite to each other can ensure that the two pressure relief ports will not interfere with each other when relieving pressure, and it is also more compact in structure.

[0016] As an optional technical solution, when the pressure in the valve body of the first pressure relief component is higher than the first pressure, it connects the container interface and the first pressure relief port; when the pressure in the valve body of the second pressure relief component is higher than the second pressure, it connects the container interface and the second pressure relief port, where the second pressure is greater than the first pressure. By setting the pressure threshold of the second pressure relief component higher than that of the first pressure relief component, it is possible to perform staged pressure relief of the high-pressure medium at the container interface, and to provide backup pressure relief through the second pressure relief port in case of malfunctions such as blockage at the first pressure relief port.

[0017] As an optional technical solution, the first pressure relief assembly includes a piston, which comprises a piston core and a seal. The piston core is correspondingly positioned with the second end of the push rod, and is made of a rigid material. The seal is sleeved on the outer surface of the piston core and correspondingly positioned with the inlet edge of the valve body; the seal is made of an elastic material. Because the seal is made of an elastic material, it ensures a proper sealing and isolation effect on the valve body inlet. Simultaneously, because the piston core is made of a rigid material, it prevents the push rod from puncturing the piston core during prolonged use, thus extending the piston core's service life. Furthermore, because the piston core is relatively hard, no pre-compression occurs when the push rod contacts it, allowing the push rod to promptly push the entire piston assembly upwards, eliminating the time difference caused by pre-compression and ensuring timely pressure relief opening.

[0018] As an optional technical solution, the first pressure relief assembly also includes a valve cap and an elastic element. The valve cap is located within the valve body and on the side of the piston away from the valve seat. A valve cap positioning part is provided on the inner wall of the valve body, and the valve cap is sealed and fixed to the valve cap positioning part on the inner wall of the valve body. The two ends of the elastic element abut against the valve cap and the piston, respectively. By fixing the valve cap in the predetermined installation position of the valve body (i.e., the valve cap positioning part) and abutting the two ends of the elastic element against the valve cap and the piston, the elastic element is compressed to a fixed initial height. The position of the piston of the first pressure relief assembly does not change, so the initial height of the elastic element also remains unchanged. Thus, by positioning the valve cap during initial installation to adjust the pressure relief of the first pressure relief assembly to the predetermined pressure relief, a stable pressure control function can be achieved without requiring manual pressure adjustment by the user beforehand, making installation convenient.

[0019] As an optional technical solution, the valve cap positioning part includes at least a first constriction. The first constriction is located at the end of the valve body away from the container interface and communicates with the pressure relief chamber. The valve cap is fixed within the first constriction. The first constriction can resist the elastic force generated by the compression of the elastic element, ensuring the reliability of the valve cap fixing, and can maintain the compression height of the elastic element to maintain a constant, so as to generate the rated preload.

[0020] As an optional technical solution, the piston component also includes a sealing seat and a valve stem. The sealing seat has a hollow guide hole. A piston core and a sealing element are fixed inside the guide hole on the side near the valve seat. The side of the guide hole away from the valve seat forms a second constriction. One end of the valve stem has a flange, which is confined within the second constriction of the guide hole. The other end of the valve stem passes through the valve cap and is linked to a handle. The valve stem and the sealing seat are in clearance fit. When the pressure or temperature inside the container interface is too high, the piston component is pushed upward, the sealing element moves upward, the sealing seat moves upward accordingly, and the elastic element is further compressed, thereby connecting the inlet of the valve seat fixing component with the pressure relief chamber. Because the valve stem and piston core are in clearance fit, the valve stem remains stationary. When the handle moves upward, it can drive the valve stem. The valve stem drives the piston core and the sealing element upward through the second constriction of the sealing seat. The sealing element leaves the inlet of the valve seat fixing component, and at the same time, the container interface and the pressure relief chamber are connected, completing the pressure relief.

[0021] As an optional technical solution, the temperature sensing element also includes a movable seal. The temperature sensing housing contains a temperature-sensitive material. When the vacuum level inside the temperature sensing housing is a preset vacuum level, the movable seal is riveted into the temperature sensing housing and seals onto the temperature-sensitive material. The first end of the push rod abuts against the side of the movable seal away from the temperature-sensitive material. By riveting the movable seal into the temperature sensing housing, there is no need to vent air bubbles; the movable seal can directly seal onto the temperature-sensitive material. Therefore, the movable seal does not need to have an vent hole, eliminating the risk of vent hole seal failure. When the temperature-sensitive material expands as the temperature rises, the movable seal pushes the push rod upwards, allowing the second end of the push rod to pass through the valve seat inlet and open the first pressure relief assembly.

[0022] The beneficial effects of this utility model are:

[0023] According to the temperature and pressure safety valve provided by this utility model, the valve seat and fixing parts with relatively fine structures are integrally formed into a valve seat fixing part and detachably installed on the valve body. Thus, during the manufacturing process, the valve body can be manufactured separately and then assembled with the valve seat and fixing part assembly. Since the valve body does not need to be integrally formed with the tightly and complex valve seat and fixing part, other better forming methods can be selected, such as hot extrusion forming. Compared with the existing technology of using sand casting to form an integral structure of valve body, valve seat and fixing part, the valve body has better density, reduces the risk of sand hole leakage, and ensures better processing quality of the valve body. In addition, the hot extrusion process is simple and low-cost, making the processing of the valve body simpler, thereby improving the processing efficiency of the valve body and reducing processing costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a temperature and pressure safety valve according to an embodiment of the present utility model;

[0025] Figure 2 This is a cross-sectional structural schematic diagram of a temperature and pressure safety valve according to an embodiment of this utility model;

[0026] Figure 3 This is a structural schematic diagram of a valve seat fixing component of a temperature and pressure safety valve according to an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the cooperation structure between the fixing component and the temperature sensing element of a temperature and pressure safety valve in one embodiment of this utility model.

[0028] Figure 5 The image below is a schematic diagram of the temperature sensing element of a temperature and pressure safety valve according to an embodiment of this utility model.

[0029] Figure 6 This is a partially enlarged structural schematic diagram of a temperature and pressure safety valve according to an embodiment of this utility model;

[0030] Figure 7 This is a schematic diagram of the valve body and the first pressure relief component of a temperature and pressure safety valve according to an embodiment of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1-Valve body, 11-Container interface, 12-First pressure relief port, 13-Fixed component mounting groove, 14-Second pressure relief port; 15-Pressure relief chamber;

[0033] 2-Valve seat fixing part, 21-Valve seat part, 211-Valve seat body, 212-Threaded head, 213-Valve seat step part, 214-Valve seat sealing ring, 22-Fixing part, 221-Arc plate, 2211-Snap-fit ​​groove, 222-Support rod;

[0034] 3-First pressure relief assembly, 31-Piston part, 311-Piston core, 312-Seal, 313-Seal seat, 3131-Guide hole, 314-Valve stem, 3141-Flange, 32-Valve cap, 33-Elastic part, 34-Handle;

[0035] 4-Temperature sensing element, 41-Temperature sensing housing, 411-Annular boss, 42-Push rod, 43-Modible seal, 44-Temperature sensing material, 45-Reset spring;

[0036] 5-Second pressure relief assembly, 51-Housing, 52-Sealing ring, 53-Pressure bearing component, 531-Pressure bearing head, 532-Modular rod. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] First Embodiment

[0042] Figure 1 This is a schematic diagram of the overall structure of a temperature and pressure safety valve provided by this utility model. Figure 2 This is a cross-sectional structural diagram of a temperature and pressure safety valve provided by this utility model. (Combined with...) Figure 1 and Figure 2 The temperature and pressure safety valve provided by this utility model includes a valve body 1, a valve seat fixing component 2, a first pressure relief component 3, and a temperature sensing element 4.

[0043] The valve body 1 is formed as a hollow shell, with a valve cavity inside. The specific shape and structure of the valve body 1 and the valve cavity are not limited, nor is the material of the valve body 1. Those skilled in the art can freely choose plastic, rubber, copper, or stainless steel for the valve body 1 depending on the application scenario. The valve body 1 is also provided with a container interface 11 and a first pressure relief port 12. Both the container interface 11 and the first pressure relief port 12 are connected to the valve cavity, and a pressure relief flow channel is formed between the container interface 11 and the first pressure relief port 12.

[0044] The first pressure relief assembly 3, the temperature sensing element 4, and the valve seat fixing component 2 are all located inside the valve cavity. The valve seat fixing component 2 includes a valve seat part 21 and a fixing part 22.

[0045] The valve seat portion 21 cooperates with the first pressure relief assembly 3 to realize the connection / cut-off between the container interface 11 and the first pressure relief port 12. Specifically, the valve seat portion 21 encloses to form a hollow inlet. The shape of the valve seat portion 21 is not limited here. Generally speaking, the valve seat portion 21 is fixed on the inner wall of the valve body 1 and extends inward from the inner wall of the valve body 1 along the side away from the container interface 11, enclosing to form an inlet with a diameter smaller than the inner diameter of the valve body 1. The container interface 11 and the first pressure relief port 12 are connected through this inlet.

[0046] A hollow chamber is formed between the inlet of the valve seat portion 21 and the first pressure relief port 12 for the flow of pressure relief fluid. This chamber is defined as the pressure relief chamber 15. The first pressure relief assembly 3 is disposed in the pressure relief chamber 15 and is movably abutted against the inlet of the valve seat portion 21. The structure of the first pressure relief assembly 3 is not limited here, as long as it can open the inlet when there is overpressure in the container and close the inlet when there is normal pressure in the container. For example, the first pressure relief assembly 3 may have a movable end that abuts against the side of the inlet of the valve seat portion 21 away from the container interface 11. When it is subjected to pressure from the side of the container interface 11 that is higher than a threshold, the movable end will move to a position spaced apart from the inlet of the valve seat portion 21. Therefore, under normal conditions where the container is not overpressurized, the first pressure relief component 3 abuts against the inlet of the closed valve seat 21, meaning the connection between the container interface 11 and the first pressure relief port 12 is cut off. When the pressure inside the container exceeds a threshold, the first pressure relief component 3 is pushed open, the inlet of the valve seat 21 opens, and thus the container interface 11 and the first pressure relief port 12 are connected. The overpressurized fluid in the container interface 11 flows into the pressure relief chamber 15 and is discharged through the first pressure relief port 12.

[0047] Both the fixing part 22 and the temperature sensing element 4 are integrally formed with the valve seat part 21 on the side of the valve seat part 21 near the container interface 11. Specifically, the fixing part 22 may be formed by extending inward from the inner wall of the valve seat part 21. The temperature sensing element 4 includes a temperature sensing shell 41 and a push rod 42. The temperature sensing shell 41 is fixed in the fixing part 22, that is, the fixing part 22 can indirectly fix the temperature sensing shell 41 in the valve body 1.

[0048] The temperature sensing element 4 is disposed opposite to the first pressure relief assembly 3 across the inlet of the valve seat portion 21, and is used to push the first pressure relief assembly 3. The specific structure of the temperature sensing element 4 is not limited here, as long as it can open the first pressure relief assembly 3 when the fluid temperature in the container interface 11 exceeds a predetermined temperature. In some optional embodiments, the temperature sensing element may include a push rod 42 and a temperature sensing housing 41. The first end of the push rod 42 is located inside the temperature sensing housing 41, and the second end extends out of the temperature sensing housing 41 and is disposed corresponding to the inlet of the valve body 1. In some embodiments, the temperature sensing housing 41 may contain a temperature-sensitive material 44. When the temperature rises, the temperature-sensitive material 44 expands, the push rod 42 is pushed out and elongated, passes through the inlet of the valve body 1 and abuts against the first pressure relief assembly 3, thereby pushing the first pressure relief assembly 3 to move to control the opening and closing between the container interface 11 and the first pressure relief port 12. In other embodiments, a temperature sensing device and a controller may also be provided inside the temperature sensing housing 41. The temperature sensing device and the controller are connected in communication. The controller is linked with the top rod 42. The temperature sensing device detects the temperature inside the container and feeds it back to the controller. The controller receives the temperature detection result from the temperature sensing device and compares the temperature detection result with a preset temperature threshold. When the temperature detection result is greater than the temperature threshold, the controller controls the top rod 42 to extend and push the first pressure relief component 3 to move, so as to control the connection and disconnection between the container interface 11 and the first pressure relief port 12.

[0049] Specifically, in this embodiment, the valve body 1 and the valve seat fixing member 2 are separately and detachably configured. The structure of the valve body 1 and the valve seat fixing member 2 and the detachable installation method are not limited here. For example, in some embodiments, the valve seat fixing member 2 can be threaded and installed on the inner wall of the valve body 1, the valve seat fixing member 2 can be snapped into the installation structure of the inner wall of the valve body 1, or the valve seat fixing member 2 can be directly fixed with an interference fit to the inner wall of the valve body 1. Those skilled in the art will understand that any simple replacement of the structure and disassembly method of the valve body 1 and the valve seat fixing member 2 is within the protection scope of this utility model.

[0050] Currently, common traditional temperature and pressure safety valves are mainly manufactured by integrally molding the valve body 1, valve seat, and fixing parts. However, due to the relatively complex overall structure of the valve seat and fixing parts, the entire valve body 1 needs to be molded by sand casting. Sand casting process has a significant risk of leakage and is also costly.

[0051] In this embodiment, the valve seat and the fixing component, which have relatively fine structures, are integrally formed into a valve seat fixing component 2, and the valve seat fixing component 2 is detachably installed on the valve body 1. Thus, during the manufacturing process, the valve body 1 and the valve seat fixing component 2 can be manufactured separately and then assembled. Since the valve body 1 does not need to be integrally formed with the structurally complex valve seat fixing component 2, other superior forming methods can be selected, such as hot extrusion forming. The valve seat and the fixing component can also be manufactured separately using other forming methods, thereby improving the overall structural reliability of the formed temperature and pressure safety valve, reducing the subsequent leakage risk, and lowering costs.

[0052] Second Embodiment

[0053] The temperature and pressure safety valve provided in the second embodiment of this utility model has a more detailed structure of the valve seat fixing member 2 compared with the first embodiment. The other structures are the same as those in the first embodiment and will not be described in detail here.

[0054] Figure 3 This is a structural schematic diagram of the valve seat fixing member 2 of the temperature and pressure safety valve provided in the second embodiment of this utility model. Combined with... Figure 2 and Figure 3 The valve seat part 21 of the valve seat fixing member 2 has a valve seat body 211 and a threaded head 212. The valve seat body 211 extends inward from the inner wall of the valve body 1 to form an inlet, while the threaded head 212 is located on the side of the valve seat body 211 near the container interface 11 and faces the container interface 11. Correspondingly, a corresponding internal thread structure is formed on the inner wall of the valve body 1 near the container interface 11. Thus, the valve body 1 can be tightened and fixed to the inner wall near the container interface 11 by the thread, which is convenient for installation. Furthermore, the valve seat body 211 faces the first pressure relief assembly 3, which facilitates the first pressure relief assembly 3 to press and seal.

[0055] In some optional embodiments, a valve seat step 213 may be formed at the connection position between the valve seat body 211 and the threaded head 212. Correspondingly, a boss is formed on the inner wall of the valve body 1, and a valve seat sealing ring 214 is fitted on the valve seat step 213. Thus, when installing the valve seat fixing member 2, the user can quickly determine and install the valve seat fixing member 2 in the predetermined installation position through the valve seat step 213. At this time, the valve seat sealing ring 214 can be pressed between the valve seat step 213 and the boss, thereby simultaneously achieving fixation and sealing between the valve seat fixing member 2 and the inner wall of the valve body 1, and improving the sealing effect.

[0056] The fixing part 22 includes an arc-shaped plate 221 and a support rod 222. The support rod 222 is fixed between the inner wall of the valve seat part 21 and the outer side of the arc-shaped plate 221. The support rod 222 can be formed by extending inward from the inner wall of the valve seat part 21 at any position. For example, it can be formed by extending inward from the inner wall of the threaded head 212, so that the temperature sensing element 4 can be easily fixed on the side of the valve seat part 21 facing the container interface 11. The arc-shaped plate 221 has a snap-fit ​​groove 2211. The temperature sensing shell 41 of the temperature sensing element 4 is detachably fixed in the snap-fit ​​groove 2211. For example, the temperature sensing shell 41 of the temperature sensing element 4 can be detachably fixed in the snap-fit ​​groove 2211. Thus, the fixing part 22 can be integrally formed with the valve seat part 21, which simplifies the manufacturing process. Moreover, the use of only the support rod 222 for fixing results in less obstruction to the flow channel and ensures that the flow path between the container interface 11 and the inlet of the valve seat part 21 is unobstructed.

[0057] In this embodiment, the materials of the valve seat fixing component 2 and the valve body 1 are not limited; both the valve seat fixing component 2 and the valve body 1 can be made of metal or plastic. Optionally, for the separate valve seat fixing component 2 and valve body 1, considering that the inlet of the valve seat fixing component 2 of the temperature and pressure safety valve needs to be frequently opened / closed, the valve seat fixing component 2 is subjected to frequent pressure. Therefore, in order to increase the product service life while reducing costs, the valve seat fixing component 2 can be made of metal, which can avoid wear and ensure pressure resistance. In addition, the valve body 1 can be integrally molded from plastic, which is convenient for processing and saves costs.

[0058] Furthermore, Figure 4 The middle section is a cross-sectional view of the mating structure of the valve seat fixing member 2 and the temperature sensing element 4 of a temperature and pressure safety valve provided in the second embodiment of this utility model. Figure 5 The diagram below is a schematic diagram of the temperature sensing element 4 of a temperature and pressure safety valve provided in the second embodiment of this utility model. Figure 4 and Figure 5As shown, in some optional embodiments, the temperature sensing element 4 further includes a movable seal 43, and the temperature sensing shell 41 of the temperature sensing element 4 is provided with a temperature-sensitive material 44. The specific material of the temperature-sensitive material 44 is not limited here. Any substance that can change volume with the temperature change inside the container can be selected according to the requirements, such as paraffin, mercury, carbon dioxide, etc. Those skilled in the art can freely choose according to the temperature detection requirements inside the container, and all of them are within the protection scope of this utility model. When the vacuum level inside the temperature-sensing housing 41 is the preset vacuum level, the movable seal 43 is riveted into the temperature-sensing housing 41. Since the temperature-sensing housing 41 is a vacuum environment, no air gap will be generated between the temperature-sensing material 44 and the movable seal 43, so there is no need to vent air. The movable seal 43 can directly seal the temperature-sensing material 44. Therefore, the movable seal 43 does not need to open an exhaust port, and there is no risk of exhaust port sealing failure. The first end of the push rod 42 abuts against the side of the movable seal 43 away from the temperature-sensing material 44. When the temperature-sensing material 44 expands as the temperature rises, the movable seal 43 pushes the push rod 42 upward, so that the second end of the push rod 42 can pass through the inlet of the valve seat and open the first pressure relief assembly 3.

[0059] Optionally, combining Figure 3 and Figure 4 As can be seen, an annular boss 411 is provided at the top of the temperature sensing housing 41. When the temperature sensing housing 41 is inserted into the snap-fit ​​groove 2211, the top surface of the first arc plate 221 abuts against the bottom surface of the annular boss 411, so that the annular boss 411 provides a limiting function for the fixing part 22, ensuring the stability of the position of the temperature sensing element 4 in the valve body 1.

[0060] Third Embodiment

[0061] Compared to any of the embodiments described above, the temperature and pressure safety valve provided in the third embodiment of this utility model also has a second pressure relief structure. The other structures are the same as any of the embodiments described above, and will not be described in detail here.

[0062] Figure 6 This is a partially enlarged structural diagram of the temperature and pressure safety valve provided in the third embodiment of this utility model. (See diagram below.) Figure 6 As shown, the temperature and pressure safety valve may further include a second pressure relief port 14 and a second pressure relief assembly 5. The second pressure relief port 14 is located on the valve body 1 and communicates with the pressure relief chamber 15. It should be noted that the specific location of the second pressure relief port 14 is not limited. Figure 6 An alternative embodiment is illustrated, in which the second pressure relief port 14 is arranged opposite to the first pressure relief port 12. Arranging the first pressure relief port 12 and the second pressure relief port 14 opposite to each other can ensure that the two pressure relief ports will not interfere with each other when relieving pressure, and the structure is also more compact.

[0063] The second pressure relief component 5 is located at the second pressure relief port 14. The second pressure relief component 5 is an auxiliary pressure relief component. It only responds to the pressure value in the pressure relief chamber 15 of the valve body 1 to switch between connecting / isolating the pressure relief chamber 15 and the second pressure relief port 14. It does not need to respond to the detection result of the temperature sensor. Therefore, the type of the second pressure relief component 5 can be some single pressure response device.

[0064] For example, the second pressure relief assembly 5 may include a housing 51 and a pressure-bearing component 53. The housing 51 is fixed inside the second pressure relief port 14, and a sealing ring 52 is fixed inside the housing 51, so that the housing 51 can be sealed and fixed to the inner wall of the second pressure relief port 14. The pressure-bearing component 53 is disposed inside the housing 51 and has a pressure-bearing head 531 and a movable rod 532. The pressure-bearing head 531 faces the inside of the valve body 1 (i.e., towards the pressure relief chamber 15), and the movable rod 532 passes through the sealing ring 52 and is fixed to the pressure-bearing head 531. The outer diameter of the pressure-bearing head 531 is larger than the inner diameter of the sealing ring 52, and the outer diameter of the pressure-bearing head 531 is not larger than the inner diameter of the housing 51. That is, the pressure-bearing head 531 is on the side of the sealing ring 52 facing the pressure relief chamber 15 and abuts against the sealing ring 52.

[0065] Specifically, when the pressure inside the pressure relief chamber 15 exceeds the pressure threshold of the second pressure relief assembly 5, the pressure-bearing head 531 is subjected to the pressure inside the pressure relief chamber 15 and abuts against and compresses the sealing ring 52 until the sealing ring 52 is deformed by the pressure, so that the internal medium can flow out from the second pressure relief port 14. The second pressure relief assembly 5 can assist the first pressure relief assembly 3 to complete the pressure relief more quickly, and can also promptly release the medium with excessive pressure in the valve cavity in case the first pressure relief assembly 3 fails, so as to avoid the risk of safety accidents such as valve body 1 explosion.

[0066] Optionally, when the pressure in the first pressure relief component 3 within the valve body 1 is higher than a first pressure, it connects the container interface 11 and the first pressure relief port 12. When the pressure in the second pressure relief component 5 within the pressure relief chamber 15 is higher than a second pressure, it connects the pressure relief chamber 15 and the second pressure relief port 14, where the second pressure is greater than the first pressure. By setting the pressure threshold of the second pressure relief component 5 higher than the pressure threshold of the first pressure relief component 3, it is possible to perform staged pressure relief of the high-pressure medium in the container interface 11, and to provide backup pressure relief through the second pressure relief port 14 in case of a malfunction such as blockage at the first pressure relief port 12.

[0067] In this embodiment, by setting the second pressure relief port 14 and the second pressure relief component 5, when the medium in the container interface 11 is overpressurized, the first pressure relief component 3 is used to relieve the pressure first. During the pressure relief process of the first pressure relief component 3, if the pressure in the pressure relief chamber 15 is too high due to problems such as excessive flow in the pressure relief chamber 15 or blockage of the first pressure relief port 12, the second pressure relief component 5 can assist the first pressure relief component 3 to complete the pressure relief more quickly and release the medium with excessive pressure in the pressure relief chamber 15 in time, so that the temperature and pressure safety valve has a higher pressure relief response speed and better safety.

[0068] Fourth embodiment

[0069] The temperature and pressure safety valve provided in the fourth embodiment of this utility model provides a more detailed structural description of the first pressure relief component 3 compared to the first or second embodiment. The other structures are the same as those in the first or second embodiment and will not be described in detail here.

[0070] Figure 7 This is a schematic diagram of the valve body 1 and the first pressure relief assembly 3 of a temperature and pressure safety valve according to the fourth embodiment of this utility model. (Combined with...) Figure 2 and Figure 7 The first pressure relief assembly 3 includes a piston 31, a valve cap 32, and an elastic element 33. The piston 31 is the moving end of the first pressure relief assembly 3. The piston 31 includes a piston core 311 and a sealing element 312. The piston core 311 is correspondingly arranged with the second end of the push rod 42. The piston core 311 is made of rigid material. The sealing element 312 is sleeved on the outer surface of the piston core 311 and is correspondingly arranged with the inlet edge of the valve body 1. The sealing element 312 is made of elastic material.

[0071] Specifically, when the temperature sensing element 4 senses the high temperature inside the container, the top rod 42 of the temperature sensing element 4 can move upward through the inlet to abut the piston core 311. By pushing the piston core 311, the piston part 31 of the entire first pressure relief assembly 3 can be moved upward along the upper part of the figure to open the inlet to connect the container interface 11 and the first pressure relief port 12, thereby realizing the pressure relief inside the container.

[0072] Since the seal 312 is made of an elastic material (such as resin or rubber), it can ensure the sealing and isolation effect of the seal 312 on the inlet of the valve body 1. At the same time, since the piston core 311 is made of a rigid material (such as metal), on the one hand, it can prevent the push rod 42 from puncturing the piston core 311 during long-term use, thus improving the service life of the piston core 311. On the other hand, since the piston core 311 is relatively hard, no pre-compression will occur when the push rod 42 contacts the piston core 311, so that the push rod 42 can push the entire piston 31 upward in time, eliminating the time difference caused by pre-compression, thereby ensuring that the pressure relief opening time is relatively timely.

[0073] The valve cap 32 is disposed inside the valve body 1 and located on the side of the piston member 31 away from the valve seat 21. The inner wall of the valve body 1 is provided with a valve cap positioning part. For example, optionally, the inner wall of the valve body 1 may be provided with a valve cap step for the valve cap 32 to abut and fix, or a valve cap snap-fit ​​groove may be provided for the valve cap 32 to snap and fix. It is not limited here. Further, the upper end of the inner wall of the valve body 1 (the end away from the container interface 11) forms a through first constriction. The first constriction communicates with the pressure relief chamber 15. The valve cap 32 is fixed in the first constriction at the upper end of the valve body 1. The two ends of the elastic member 33 abut to the sealing seat 313 and the sealing seat 313 / piston member 31, respectively. In this embodiment, by fixing the valve cap 32 to a predetermined installation position (i.e., valve cap positioning part) inside the valve body 1, and by abutting both ends of the elastic member 33 (e.g., spring) to the valve cap 32 and the sealing seat 313 / piston member 31 respectively, and the sealing member 312 of the piston member 31 abutting against the inlet of the valve seat fixing member 2, the elastic member 33 is thus compressed to a fixed initial height between the valve cap 32 and the sealing seat 313 / piston member 31 to generate a rated preload force.

[0074] In some optional embodiments, the piston 31 further includes a sealing seat 313 and a valve stem 314. The sealing seat 313 has a hollow guide hole 3131. A piston core 311 and a sealing element 312 are fixed inside the guide hole 3131 on the side near the valve seat portion 21. The side of the guide hole 3131 away from the valve seat fixing element 2 is formed into a second constriction. One end of the valve stem 314 has a flange 3141, which is confined within the second constriction of the guide hole 3131. The other end of the valve stem 314 passes through the valve cap 32 and is linked to a handle 34. The valve stem 314 and the sealing seat 313 are in clearance fit. When the pressure or temperature inside the container interface 11 is too high, the piston 31 is pushed upward, the sealing element 312 moves upward, the sealing seat 313 moves upward accordingly, and the elastic element 33 is further compressed, thereby connecting the inlet of the valve seat fixing element 2 with the pressure relief chamber 15. Because the valve stem 314 and the piston core 311 are in clearance fit, the valve stem 314 remains stationary. When the handle 34 moves upward, it can drive the valve stem 314. The valve stem 314 drives the piston core 311 and the seal 312 to move upward through the second constriction of the sealing seat 313. The seal 312 leaves the inlet of the valve seat fixing member 2. At the same time, the container interface 11 and the pressure relief chamber 15 are connected to complete the pressure relief.

[0075] In this embodiment, by fixing the upper end of the first pressure relief component 3 (i.e., valve cap 32) to the first constriction at the upper end of the valve body 1, and setting the lower end of the first pressure relief component 3 to a second constriction, and by fixing the first constriction of the valve cap 32 and the sealing member 312 located in the second constriction (the sealing member 312 abuts against the inlet of the valve seat fixing member 2), the first pressure relief component 3 can be limited between the upper mounting port and the middle inlet inside the valve cavity of the valve body 1 (i.e., inside the pressure relief chamber 15), and the elastic member 33 in the first pressure relief component 3 is thus compressed to a fixed initial height. The position of the first pressure relief component 3 will not change, so the initial height of the elastic member 33 also remains unchanged, thereby achieving the function of stable pressure control.

[0076] Furthermore, since the valve cap 32 is fixed on the valve cap positioning part at the predetermined installation position, that is, the initial positions of the valve cap 32 and the seal 312 are both fixed, the initial height of the elastic element 33 remains unchanged, and its elastic force can always be stable at a rated value; when the temperature rises in the container interface 11, the push rod 42 of the temperature sensing element 4 moves upward. When the temperature reaches the rated value, the push rod 42 of the temperature sensing element 4 will push the piston core 311 and the seal 312 upward, thereby compressing the elastic element 33 upward; when the pressure in the container interface 11 exceeds the rated value, the high-pressure fluid will also push the piston core 311 and the seal 312 upward, and automatically release pressure through the first pressure relief port 12.

[0077] Furthermore, due to the clearance fit between the valve stem 314 and the piston core 311, the valve stem 314 remains stationary during automatic pressure relief, i.e., when the piston core 311 actively moves upward. When the handle 34 moves upward, it drives the valve stem 314, which, through the second constriction of the sealing seat 313, drives the piston core 311 and the seal 312 upward. The seal 312 moves away from the inlet of the valve seat fixing member 2, and simultaneously the container interface 11 connects to the pressure relief chamber 15, completing manual pressure relief. This allows for both automatic and manual pressure relief without interference.

[0078] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A temperature and pressure safety valve, characterized in that, include: A valve body (1) is provided with a container interface (11) and a first pressure relief port (12) respectively; a valve seat fixing member (2) is detachably disposed inside the valve body (1), the valve seat fixing member (2) has a valve seat part (21) and a fixing part (22), the valve seat part (21) surrounds to form a hollow inlet, the container interface (11) and the first pressure relief port (12) are connected through the inlet, and the fixing part (22) is formed by extending inward from the inner wall of the valve seat part (21); The first pressure relief assembly (3) has a pressure relief chamber (16) between the inlet and the first pressure relief port (13), the pressure relief chamber (16) is formed by the valve body (1), the first pressure relief assembly (2) is disposed in the pressure relief chamber (16), and the first pressure relief assembly (3) abuts against the inlet of the valve seat (21) for opening / closing the inlet; A temperature sensing element (4) is disposed opposite to the first pressure relief assembly (3) across the inlet. The temperature sensing element (4) is fixed in the fixing part (22) of the valve seat fixing member (2) and is used to push the first pressure relief assembly (3).

2. The temperature and pressure safety valve according to claim 1, characterized in that, The temperature sensing element (3) includes a temperature sensing housing (31) and a push rod (32). The first end of the push rod (32) is located inside the temperature sensing housing (31), and the second end of the push rod (32) extends out of the temperature sensing housing (31). The second end of the push rod (32) can pass through the inlet of the valve seat (11) and abut against the first pressure relief assembly (2).

3. The temperature and pressure safety valve according to claim 2, characterized in that, The fixing part (22) includes: The arc-shaped plate (221) has a snap-fit ​​groove (2211), and the temperature-sensing shell (41) is fixed in the snap-fit ​​groove (2211); The support rod (222) is fixed between the inner wall surface of the valve seat (21) and the outer side surface of the arc plate (221).

4. The temperature and pressure safety valve according to claim 3, characterized in that, The valve seat portion (21) has a valve seat body (211) and a threaded head (212), the threaded head (212) is disposed toward the container interface (11), and a corresponding internal thread structure is formed on the inner wall of the valve body (1).

5. The temperature and pressure safety valve according to claim 4, characterized in that, A valve seat step portion (213) is formed at the connection position between the valve seat body (211) and the threaded head (212), and a corresponding boss is formed on the inner wall of the valve body (1). A valve seat sealing ring (214) is fitted on the step portion (213).

6. The temperature and pressure safety valve according to claim 4, characterized in that, The fixing part (22) is disposed inside the threaded head (212).

7. The temperature and pressure safety valve according to claim 1, characterized in that: Also includes: A second pressure relief port (14) is provided on the valve body (1), and the second pressure relief port (14) is connected to the pressure relief chamber (16); The second pressure relief assembly (5) is located at the second pressure relief port (14) and is used to switch between connecting / isolating the pressure relief chamber (16) and the second pressure relief port (14).

8. The temperature and pressure safety valve according to claim 7, characterized in that, The second pressure relief assembly (5) includes: The housing (51) is fixed at the second pressure relief port (14), and a sealing ring (52) is fixed inside the housing (51); A pressure-bearing component (53) is disposed inside the housing (51) and has a pressure-bearing head (531) and a movable rod (532). The pressure-bearing head (531) faces the interior of the valve body (1), and the movable rod (532) is fixed to the pressure-bearing head (531) by passing through the sealing ring (52). The outer diameter of the pressure-bearing head (531) is larger than the inner diameter of the sealing ring (52), and the outer diameter of the pressure-bearing head (531) is not larger than the inner diameter of the housing (51).

9. The temperature and pressure safety valve according to claim 7, characterized in that, The second pressure relief port (14) is positioned opposite to the first pressure relief port (12).

10. The temperature and pressure safety valve according to claim 2, characterized in that, The first pressure relief assembly (3) includes a piston (31), which includes a piston core (311) and a seal (312). The piston core (311) is disposed corresponding to the second end of the push rod (42), and the piston core (311) is made of rigid material. The seal (312) is sleeved on the outer surface of the piston core (311) and is disposed corresponding to the inlet edge of the valve body (1). The seal (312) is made of elastic material.

11. The temperature and pressure safety valve according to claim 10, characterized in that, The first pressure relief assembly (3) further includes: A valve cap (32) is located inside the valve body (1) and on the side of the piston (31) away from the valve seat. A valve cap positioning part is provided on the inner wall of the valve body (1). The valve cap (32) is sealed and fixed to the valve cap positioning part of the valve body (1). An elastic element (33) is provided, with its two ends abutting against the valve cap (32) and the piston element (31), respectively.

12. The temperature and pressure safety valve according to claim 11, characterized in that, The valve cap positioning part includes at least a first constriction, which is located at the end of the valve body (1) away from the container interface (11) and communicates with the pressure relief chamber (15). The valve cap (32) is fixed inside the first constriction.

13. The temperature and pressure safety valve according to claim 12, characterized in that, The piston component (31) also includes: A sealing seat (313) has a hollow guide hole (3131). The piston core (311) and the sealing element (312) are fixed inside the guide hole (3131) on the side near the valve seat (21). The side of the guide hole (3131) away from the valve seat is formed as a second constriction. A valve stem (314) has a flange (3141) at one end. The flange (3141) of the valve stem (314) is limited to the second constriction of the guide hole (3131). The other end of the valve stem (314) is sealed through the valve cap (32) and linked to a handle (34). The valve stem (314) is clearance-fitted with the sealing seat (313).

14. The temperature and pressure safety valve according to claim 2, characterized in that, The temperature sensing element (4) also includes: The movable seal (43) is provided with a temperature-sensitive material (44) inside the temperature-sensitive housing (41). When the vacuum degree inside the temperature-sensitive housing (41) is a preset vacuum degree, the movable seal (43) is riveted to the temperature-sensitive housing (41) and the movable seal (43) is sealed on the temperature-sensitive material (44). The first end of the push rod (42) abuts against and fits against the side of the movable seal (43) away from the temperature-sensitive material (44).

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