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, a valve seat, a first pressure relief assembly, a temperature sensing element and a fixing piece. The valve seat is detachably arranged in the valve body, the valve seat is provided with a valve seat body and a hollow inlet defined by the valve seat body, and the container connector communicates with the first pressure relief opening through the inlet; the first pressure relief assembly abuts against the inlet of the valve seat and is used for opening / closing the inlet. The second end of the ejector rod of the temperature sensing element can penetrate through the inlet of the valve and abut against the first pressure relief assembly so as to push the first pressure relief assembly to move to open / close the inlet. The fixing piece is detachably installed between the inner wall of the valve body and the temperature sensing element and used for fixing the temperature sensing element and the valve body. According to the temperature and pressure safety valve, 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, machining is easy, 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 temperature sensing 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, a first pressure relief assembly, a temperature sensing element, and a fixing member. The valve body has a container inlet and a first pressure relief port. The valve seat is detachably disposed within the valve body and has a valve seat body and an enclosed hollow inlet. The container inlet and the first pressure relief port are connected via the inlet. 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 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 push the first pressure relief assembly. The fixing member is separate from the valve seat and is detachably installed between the inner wall of the valve body and the temperature sensing element for fixing the temperature sensing element to the valve body.

[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 component includes a first arc-shaped plate and a second arc-shaped plate. The first arc-shaped plate has a snap-fit ​​groove, and the temperature-sensing shell is fixed in the snap-fit ​​groove. The second arc-shaped plate is fixed between the outer side of the first arc-shaped plate and the inner wall of the valve body. Because the second arc-shaped plate is arc-shaped, it forms an elastic deformation space between the outer side of the first arc-shaped plate and the inner wall of the valve body, allowing the second arc-shaped plate to fit against the inner wall of the valve body. Furthermore, the arc-shaped second arc-shaped plate provides less obstruction to the flow channel, ensuring unobstructed flow between the container interface and the valve seat inlet.

[0010] As an optional technical solution, a mounting groove for a fastener is provided on the inner wall of the valve body, and the end of the second arc-shaped plate is fixed in the mounting groove. The mounting groove can be matched with or slightly larger than the fastener, so that the fastener can be snapped and fixed in the mounting groove, further ensuring the stability of the fastener's position within the valve body.

[0011] 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.

[0012] 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. This allows the user to quickly determine and install the valve seat in the predetermined position by observing the valve seat step. At this time, the valve seat sealing ring is pressed between the valve seat step and the boss, simultaneously achieving fixation and sealing between the valve seat and the valve body, thus improving the sealing effect.

[0013] As an optional technical solution, the upper edge of the mounting groove of the fastener is flush with the lower edge of the threaded head. This allows the fastener to be placed into the valve cavity of the valve body first, and then the threaded head of the valve seat is used to press the fastener into the channel on the side of the valve body near the container interface. When the threaded head is installed, the fastener can also be pressed into the mounting groove of the fastener, simplifying the installation steps of the separate valve seat and fastener.

[0014] As an optional technical solution, the temperature and pressure safety valve also 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 chamber or blockage of the first pressure relief port, the second pressure relief assembly can assist the first pressure relief assembly in completing the pressure relief more quickly, promptly releasing the excessively pressurized medium from the pressure relief chamber to avoid the risk of safety accidents such as valve seat explosion.

[0015] 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. When the pressure inside the cavity exceeds the pressure threshold of the second pressure relief assembly, the pressure-bearing head receives the pressure inside the cavity and abuts against and compresses the sealing ring until the sealing ring is deformed by the pressure, so that the internal medium can flow out from the second pressure relief port.

[0016] 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.

[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, and is made of an elastic material. The elastic material of the seal ensures a tight seal at the valve body inlet. Simultaneously, the rigidity of the piston core prevents the push rod from puncturing it during prolonged use, thus extending its lifespan. Furthermore, the hardness of the piston core prevents pre-compression 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.

[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, and 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 piston core 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 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 drives the valve stem. The valve stem, through the second constriction of the sealing seat, drives the piston core and sealing element upward. The sealing element leaves the inlet of the valve seat, and the container interface and 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. When the vacuum level inside the temperature sensing housing is the preset vacuum level, riveting the movable seal into the temperature sensing housing does not require air venting; the movable seal can directly seal onto the temperature-sensitive material. Therefore, the movable seal does not need to have an vent hole, and there is no risk of vent hole sealing failure. When the temperature-sensitive material expands as the temperature rises, the movable seal pushes the push rod upward, allowing the second end of the push rod to pass through the inlet of the valve seat 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, which have relatively delicate structures, are set separately and can be detachably installed on the valve body. Therefore, during the manufacturing process, the valve body, valve seat, and fixing parts can be manufactured separately and then assembled. Since the valve body does not need to be integrally formed with the tightly and complex valve seat and fixing parts, other superior 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 parts, the valve body has better density, reduces the risk of sand hole leakage, and ensures better processing quality. Furthermore, 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 1This 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 schematic diagram of the valve seat structure of a temperature and pressure safety valve according to an embodiment of the present utility model;

[0027] Figure 4 The image shown is a structural schematic diagram of a fixing component for a temperature and pressure safety valve according to an embodiment of this utility model.

[0028] Figure 5 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.

[0029] Figure 6 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.

[0030] Figure 7 This is a partially enlarged structural schematic diagram of a temperature and pressure safety valve according to an embodiment of this utility model;

[0031] Figure 8 This is a schematic diagram of the structure of the first pressure relief component of a temperature and pressure safety valve according to an embodiment of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Valve body, 11-Valve seat, 111-Valve seat body, 112-Threaded head, 113-Valve seat step, 114-Valve seat sealing ring, 12-Container interface, 13-First pressure relief port, 14-Fixed component mounting groove, 15-Second pressure relief port; 16-Pressure relief chamber;

[0034] 2-First pressure relief assembly, 21-Piston part, 211-Piston core, 212-Seal, 213-Seal seat, 2131-Guide hole, 214-Valve stem, 2141-Flange, 22-Valve cap, 23-Elastic part, 24-Handle;

[0035] 3-Temperature sensing element, 31-Temperature sensing housing, 311-Annular boss, 32-Push rod, 33-Modible seal, 34-Temperature sensing material, 35-Reset spring;

[0036] 4-Fixing component, 41-First arc-shaped plate, 411-Snap-fit ​​groove, 42-Second arc-shaped plate;

[0037] 5-Second pressure relief assembly, 51-Housing, 52-Sealing ring, 53-Pressure bearing component, 531-Pressure bearing head, 532-Modular rod. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] First Embodiment

[0043] 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 2The temperature and pressure safety valve provided by this utility model includes a valve body 1, a valve seat 11, a first pressure relief component 2, a temperature sensing element 3, and a fixing component 4.

[0044] 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 12 and a first pressure relief port 13. Both the container interface 12 and the first pressure relief port 13 are connected to the valve cavity, and a pressure relief flow channel is formed between the container interface 12 and the first pressure relief port 13.

[0045] The valve seat 11, the first pressure relief assembly 2, the temperature sensing element 3, and the fixing member 4 are all disposed inside the valve cavity. The valve seat 11 cooperates with the first pressure relief assembly 2 to realize the connection / cut-off between the container interface 12 and the first pressure relief port 13. Specifically, the valve seat 11 forms a hollow inlet. The shape of the valve seat 11 is not limited here. Generally speaking, the valve seat 11 can be integrally formed with the valve body 1. The valve seat 11 extends inward from the inner wall of the valve body 1 along the side away from the container interface 12, forming an inlet with a diameter smaller than the inner diameter of the valve body 1. The container interface 12 and the first pressure relief port 13 are connected through this inlet.

[0046] A hollow chamber is formed between the inlet of valve seat 11 and the first pressure relief port 13 for the flow of pressure relief fluid. This chamber is defined as pressure relief chamber 16. The first pressure relief assembly 2 is disposed within the pressure relief chamber 16 and is movably abutted against the inlet of valve seat 11. The structure of the first pressure relief assembly 2 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 2 may have a movable end that abuts against the side of the inlet of valve seat 11 away from the container interface 12. When it is subjected to pressure from the side of container interface 12 that exceeds a threshold, the movable end will move to a position at the inlet gap of valve seat 11. Therefore, under normal conditions where there is no overpressure inside the container, the first pressure relief component 2 abuts against the inlet of the closing valve seat 11, that is, the container interface 12 and the first pressure relief port 13 are in a cut-off state. When the pressure inside the container exceeds the threshold, the first pressure relief component 2 is pushed open, the inlet of the valve seat 11 is opened, and the container interface 12 and the first pressure relief port 13 are connected. The overpressure fluid in the container interface 12 flows into the pressure relief chamber 16 and is discharged from the first pressure relief port 13.

[0047] The fixing component 4 and the temperature sensing element 3 are arranged on the side of the valve seat 11 near the container interface 12, that is, the first pressure relief component 2 and the temperature sensing element 3 are arranged opposite each other across the inlet of the valve seat 11. The fixing component 4 is fixed inside the valve body 1. The temperature sensing element 3 includes a temperature sensing shell 31 and a push rod 32. The temperature sensing shell 31 is fixed inside the fixing component 4, that is, the fixing component 4 can indirectly fix the temperature sensing shell 31 inside the valve body 1.

[0048] The temperature sensing element 3 is disposed opposite to the first pressure relief assembly 2 across the inlet, and is used to push the first pressure relief assembly 2. The specific structure of the temperature sensing element 3 is not limited here, as long as it can open the first pressure relief assembly 2 when the fluid temperature in the container interface 12 exceeds a predetermined temperature. In some optional embodiments, the temperature sensing element may include a push rod 32 and a temperature sensing housing 31. The first end of the push rod 32 is located inside the temperature sensing housing 31, and the second end extends out of the temperature sensing housing 31 and is disposed corresponding to the inlet of the valve body 1. In some embodiments, the temperature sensing housing 31 may contain a temperature-sensitive material 34. When the temperature rises, the temperature-sensitive material 34 expands, the push rod 32 is pushed out and elongated, passes through the inlet of the valve body 1 and abuts against the first pressure relief assembly 2, thereby pushing the first pressure relief assembly 2 to move, so as to control the opening and closing between the container interface 12 and the first pressure relief port 13. In other embodiments, a temperature sensing device and a controller may also be provided inside the temperature sensing housing 31. The temperature sensing device and the controller are connected in communication. The controller is linked with the top rod 32. 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 32 to extend and push the first pressure relief component 2 to move, so as to control the connection and disconnection between the container interface 12 and the first pressure relief port 13.

[0049] Specifically, in this embodiment, the fixing member 4 and the valve seat 11 are separately provided, and both the fixing member 4 and the valve seat 11 can be detachably installed between the inner wall of the valve body 1 and the temperature sensing element 3. The structure of the valve seat 11 and the fixing member 4 and the detachable installation method are not limited here. For example, in some embodiments, the valve seat 11 can be fixedly installed to the inner wall of the valve body 1 by threads, and the fixing member 4 can be snapped into the installation structure of the inner wall of the valve body 1. Alternatively, in other embodiments, the valve seat 11 can be fixedly installed to the inner wall of the valve body 1 by slot insertion, and the fixing member 4 can be directly fixed to the inner wall of the valve body 1 by interference fit. Those skilled in the art will understand that any simple replacement of the structure and disassembly method of the valve seat 11 and the fixing member 4 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 11 and fixing part 4. However, since the overall structure of the valve seat 11 and fixing part 4 is relatively complex, the entire valve body 1 needs to be molded by sand casting. However, the sand casting process has a large risk of leakage and is costly.

[0051] In this embodiment, the valve seat 11 and the fixing member 4, which have relatively delicate structures, are set separately and detachably installed on the valve body 1. This allows the valve body 1, valve seat 11, and fixing member 4 to be manufactured separately and then assembled. Since the valve body 1 does not need to be integrally formed with the tightly and complex valve seat 11 and fixing member 4, other superior forming methods can be selected, such as hot extrusion forming. The valve seat 11 and fixing member 4 can also be manufactured separately using other forming methods. This improves the overall structural reliability of the formed temperature and pressure safety valve, reduces the risk of subsequent leakage, and lowers 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 valve seat 11 compared to 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 schematic diagram of the valve seat 11 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 11 comprises a valve seat body 111 and a threaded head 112. The valve seat body 111 extends inward from the inner wall of the valve body 1 to form an inlet, while the threaded head 112 is located on the side of the valve seat body 111 near the container interface 12 and faces the container interface 12. Correspondingly, a corresponding internal thread structure is formed on the inner wall of the valve body 1 near the container interface 12. Thus, the valve body 1 can be tightened and fixed to the inner wall near the container interface 12 by the thread, making installation convenient. Furthermore, the valve seat body 111 faces the first pressure relief assembly 2, facilitating the first pressure relief assembly 2 to press and seal.

[0055] In some optional embodiments, a valve seat step 113 may be formed at the connection position between the valve seat body 111 and the threaded head 112. Correspondingly, a boss is formed on the inner wall of the valve body 1, and a valve seat sealing ring 114 is fitted on the valve seat step 113. Thus, when installing the valve seat 11, the user can quickly determine and install the valve seat 11 in the predetermined installation position by using the valve seat step 113. At this time, the valve seat sealing ring 114 can be pressed between the valve seat step 113 and the boss, thereby simultaneously achieving fixation and sealing between the valve seat 11 and the inner wall of the valve body 1, and improving the sealing effect.

[0056] In this embodiment, the materials of the valve seat 11 and the valve body 1 are not limited; both the valve seat 11 and the valve body 1 can be made of metal or plastic. Optionally, for the separate valve seat 11 and valve body 1, considering that the inlet of the valve seat 11 of the temperature and pressure safety valve needs to be frequently opened / closed, the valve seat 11 is subjected to frequent pressure. Therefore, in order to increase the product service life while reducing costs, the valve seat 11 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.

[0057] Third Embodiment

[0058] Compared to any of the embodiments described above, the temperature and pressure safety valve provided in the third embodiment of this utility model has a more detailed structure of the fixing member 4 and the temperature sensing element 3. The other structures are the same as any of the embodiments described above, and will not be described in detail here.

[0059] Figure 4 This is a structural schematic diagram of a fixing component for a temperature and pressure safety valve provided in the third embodiment of this utility model. (See attached diagram.) Figure 4 As shown, the fixing member 4 includes a first arc-shaped plate 41 and a second arc-shaped plate 42, wherein the second arc-shaped plate 42 is fixed between the outer side of the first arc-shaped plate 41 and the inner wall of the valve body 1. Figure 3 The example illustrates the case where the second arc-shaped plate 42 is disposed on both sides of the first arc-shaped plate 41. The first arc-shaped plate 41 has a snap-fit ​​groove 411, and the temperature sensing shell 31 of the temperature sensing element 3 is fixed in the snap-fit ​​groove 411. Optionally, the temperature sensing shell 31 of the temperature sensing element 3 can be interference-fitted into the snap-fit ​​groove 411. Since the second arc-shaped plate 42 is arc-shaped, an elastic deformation space is formed between the first arc-shaped plate 41 and the inner wall surface of the valve body 1, so that the second arc-shaped plate 42 can be interference-fitted to the inner wall surface of the valve body 1. Moreover, the arc-shaped second arc-shaped plate 42 has less obstruction to the flow channel, which can ensure that the flow path between the container interface 12 and the valve seat 11 inlet is unobstructed.

[0060] In this embodiment, the fastener 4 can be an independent one-piece molded structure to ensure the connection stability and reliability between the first arc plate 41 and the second arc plate 42. The fastener 4 can be made of metal, such as stainless steel or brass, so that the fastener 4 has a certain elasticity and a certain structural strength, ensuring the stability of the temperature sensing shell 31.

[0061] Furthermore, Figure 5 The third embodiment of this utility model provides a matching structure for a temperature and pressure safety valve, consisting of a fixing member 4 and a temperature sensing element 3. Figure 6 The image shown is a schematic diagram of the temperature sensing element of a temperature and pressure safety valve provided in the fourth embodiment of this utility model. Figure 5 and 6 As shown, in some optional embodiments, the temperature sensing element 3 further includes a movable seal 33, and the temperature sensing shell 31 of the temperature sensing element 3 is provided with a temperature-sensitive material 34. The specific material of the temperature-sensitive material 34 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 31 is the preset vacuum level, the movable seal 33 is riveted into the temperature-sensing housing 31. Since the temperature-sensing housing 31 is a vacuum environment, no air gap will be generated between the temperature-sensing material 34 and the movable seal 33, so there is no need to remove air bubbles. The movable seal 33 can directly seal on the temperature-sensing material 34. Therefore, the movable seal 33 does not need to open an exhaust hole, and there is no risk of exhaust hole sealing failure. The first end of the push rod 32 abuts against and fits against the side of the movable seal 33 away from the temperature-sensing material 34. A return spring 35 is fitted on the push rod 32. The return spring 35 can provide elastic force to drive the push rod 32 toward the temperature-sensing material 34. When the temperature-sensing material 34 expands as the temperature rises, the movable seal 33 pushes the push rod 32 upward, so that the second end of the push rod 32 can pass through the inlet of the valve seat 11 and open the first pressure relief assembly 2.

[0062] Optionally, combining Figure 4 and Figure 5 As can be seen, an annular boss 311 is provided at the top of the temperature sensing housing 31. When the temperature sensing housing 31 is inserted into the snap-fit ​​groove 411, the top surface of the first arc plate 41 abuts against the bottom surface of the annular boss 311, so that the annular boss 311 provides a limiting function for the fixing member 4, ensuring the stability of the position of the temperature sensing element 3 in the valve body 1.

[0063] Combination Figure 2 and Figure 4In some optional embodiments, a fastener mounting groove 14 can be provided on the inner wall surface of the valve body 1. The end of the second arc plate 42 is fixed in the fastener mounting groove 14. The fastener mounting groove 14 can match the size of the fastener 4 or be slightly larger than the fastener 4, so that the fastener 4 can be snapped and fixed in the fastener mounting groove 14, further ensuring the stability of the position of the fastener 4 in the valve body 1.

[0064] In this embodiment, optionally, the inner wall of the valve body 1 on the side of the valve seat 11 facing the container interface 12 is press-fitted with the second arc plate 42, that is, the second arc plate 42 can be directly pressed into the valve body 1 by the container interface 12 through its own elasticity. Furthermore, the diameter of the valve body 1 on the side of the container interface 12 remains unchanged and is press-fitted with the second arc plate 42, so that the fastener 4 can be more conveniently disassembled and assembled with the valve body 1.

[0065] In some alternative embodiments, the upper edge of the fastener mounting groove 14 can be flush with the lower edge of the threaded head 112, so that the fastener 4 can be first placed into the valve cavity of the valve body 1, and then the fastener 4 can be pressed into the channel on the side of the valve body 1 near the container interface 12 by using the threaded head 112 of the valve seat 11. When the threaded head 112 is installed, the fastener 4 can also be pressed into the fastener mounting groove 14, which simplifies the installation steps of the split valve seat 11 and the fastener 4.

[0066] In this embodiment, when the fastener 4 is installed inside the valve body 1, the second arc-shaped plate 42 can be pressed into the valve body 1 through the container interface 12. Since the second arc-shaped plate 42 is press-fitted against the inner wall of the valve body 1, it undergoes elastic deformation. Correspondingly, the second arc-shaped plate 42 can press tightly against the inner wall of the valve body 1 under its own elastic force, thereby ensuring the tightness and reliability of the contact between the second arc-shaped plate 42 and the inner wall of the valve body 1. Furthermore, since an elastic deformation space is formed between the first arc-shaped plate 41 and the second arc-shaped plate 42, space is provided for the elastic deformation of the second arc-shaped plate 42, preventing interference between the second arc-shaped plate 42 and the first arc-shaped plate 41 during elastic deformation.

[0067] Fourth embodiment

[0068] Compared to any of the embodiments described above, the temperature and pressure safety valve provided in the fourth 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.

[0069] Figure 7 This is a partially enlarged structural diagram of the temperature and pressure safety valve provided in the fourth embodiment of this utility model. (See diagram below.) Figure 7As shown, the temperature and pressure safety valve may further include a second pressure relief port 15 and a second pressure relief assembly 5. The second pressure relief port 15 is located on the valve body 1 and is connected to the pressure relief chamber 16 via the inlet of the valve seat 11. It should be noted that the specific location of the second pressure relief port 15 is not limited. Figure 6 An alternative embodiment is illustrated, in which the second pressure relief port 15 is arranged opposite to the first pressure relief port 13. Arranging the first pressure relief port 13 and the second pressure relief port 15 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.

[0070] The second pressure relief component 5 is located at the second pressure relief port 15. The second pressure relief component 5 is an auxiliary pressure relief component. It only responds to the pressure value in the pressure relief chamber 16 of the valve body 1 to switch between connecting / isolating the pressure relief chamber 16 and the second pressure relief port 15. 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.

[0071] 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 15, 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 15. 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 16), 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 16 and abuts against the sealing ring 52.

[0072] Specifically, when the pressure inside the pressure relief chamber 16 exceeds the pressure threshold of the second pressure relief assembly 5, the pressure-bearing head 531 receives the pressure from the pressure relief chamber 16 and abuts against the compression sealing ring 52 until the sealing ring 52 is deformed by the pressure, allowing the internal medium to flow out through the second pressure relief port 15. The second pressure relief assembly 5 can assist the first pressure relief assembly 2 in completing pressure relief more quickly, and can also promptly release the excessively pressurized medium in the valve cavity to avoid the risk of safety accidents such as valve seat 11 explosion when the first pressure relief assembly 2 malfunctions.

[0073] Optionally, when the pressure in the first pressure relief component 2 within the valve body 1 is higher than a first pressure, it connects the container interface 12 and the first pressure relief port 13. Similarly, when the pressure in the second pressure relief component 5 within the pressure relief chamber 16 is higher than a second pressure, it connects the pressure relief chamber 16 and the second pressure relief port 15, 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 2, it is possible to perform staged pressure relief of the high-pressure medium at the container interface 12, and to provide backup pressure relief through the second pressure relief port 15 in case of a blockage or other malfunction at the first pressure relief port 13.

[0074] In this embodiment, by setting the second pressure relief port 15 and the second pressure relief component 5, when the medium in the container interface 12 is overpressurized, the pressure is first relieved by the first pressure relief component 2. During the pressure relief process of the first pressure relief component 2, if the pressure in the pressure relief chamber 16 is too high due to problems such as excessive flow in the pressure relief chamber 16 or blockage of the first pressure relief port 13, the second pressure relief component 5 can assist the first pressure relief component 2 to complete the pressure relief more quickly. It can also release the medium with excessive pressure in the pressure relief chamber 16 in time when the first pressure relief component 2 fails, so that the temperature and pressure safety valve has a higher pressure relief response speed and better safety.

[0075] Fifth embodiment

[0076] The temperature and pressure safety valve provided in the fifth embodiment of this utility model provides a more detailed structural description of the first pressure relief component 2 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.

[0077] Figure 8 This is a schematic diagram of the structure of the first pressure relief component 2 of a temperature and pressure safety valve provided in the fifth embodiment of this utility model. (Combined with...) Figure 2 and Figure 8 The first pressure relief assembly 2 includes a piston 21, a valve cap 22, and an elastic element 23. The piston 21 is the moving end of the first pressure relief assembly 2. The piston 21 includes a piston core 211 and a sealing element 212. The piston core 211 is correspondingly arranged with the second end of the push rod 32. The piston core 211 is made of rigid material. The sealing element 212 is sleeved on the outer surface of the abutment and is correspondingly arranged with the inlet edge of the valve body 1. The sealing element 212 is made of elastic material.

[0078] Specifically, when the temperature sensing element 3 senses the high temperature inside the container, the top rod 32 of the temperature sensing element 3 can move upward through the inlet to abut the piston core 211, so that by pushing the piston core 211, the piston part 21 of the entire first pressure relief assembly 2 can be moved upward along the upper part of the figure to open the inlet to connect the container interface 12 and the first pressure relief port 13, thereby realizing the pressure relief inside the container.

[0079] Since the seal 212 is made of an elastic material (such as resin or rubber), it can ensure the sealing and isolation effect of the seal 212 on the inlet of the valve body 1. At the same time, since the piston core 211 is made of a rigid material (such as metal), on the one hand, it can prevent the push rod 32 from puncturing the piston core 211 or deforming the piston core during long-term use, thereby improving the service life of the piston core 211. On the other hand, since the piston core 211 is relatively hard, it will not be pre-compressed when the push rod 32 contacts the abutment, so that the push rod 32 can push the entire piston 21 upward in time, eliminating the time difference caused by pre-compression, thereby ensuring that the pressure relief opening time is relatively timely.

[0080] The valve cap 22 is disposed inside the valve body 1 and located on the side of the piston member 21 away from the valve seat 11. 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 22 to abut and fix, or a valve cap snap-fit ​​groove may be provided for the valve cap 22 to snap and fix. There is no limitation here. Further, the upper end of the inner wall of the valve body 1 (the end away from the container interface 12) forms a through first constriction. The first constriction communicates with the pressure relief chamber 16. The valve cap 22 is fixed in the first constriction at the upper end of the valve body 1. The two ends of the elastic member 23 abut to the sealing seat 213 and the sealing seat 213 / piston member 21, respectively. In this embodiment, by fixing the valve cap 22 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 23 (e.g., spring) to the valve cap 22 and the sealing seat 213 / piston member 21 respectively, while the sealing member 212 of the piston member 21 presses against the inlet of the valve seat 11, the elastic member 23 is thus compressed to a fixed initial height between the valve cap 22 and the sealing seat 213 / piston member 21 to generate a rated preload force.

[0081] In some optional embodiments, the piston 21 further includes a sealing seat 213 and a valve stem 214. The sealing seat 213 has a hollow guide hole 2131. A piston core 211 and a sealing element 213 are fixed inside the guide hole 2131 on the side near the valve seat 11. The side of the guide hole 2131 away from the valve seat 11 forms a second constriction. One end of the valve stem 214 has a flange 2141, which is confined within the second constriction of the guide hole 2131. The other end of the valve stem 214 passes through the valve cap 22 and is linked to a handle 24. The valve stem 214 and the piston core 211 are in clearance fit. When the pressure or temperature inside the container interface 12 is too high, the piston 21 is pushed upward, the sealing element 212 moves upward, the sealing seat 212 moves upward accordingly, and the elastic element 23 is further compressed, thereby connecting the inlet of the valve seat 11 with the pressure relief chamber 16. Because the valve stem 214 and the piston core 211 are in clearance fit, the valve stem 214 remains stationary. When the handle 24 moves upward, it can drive the valve stem 214. The valve stem 214 drives the piston core 211 and the seal 212 to move upward through the second constriction of the sealing seat 213. The seal 212 leaves the inlet of the valve seat 11, and at the same time, the container interface 12 and the pressure relief chamber 16 are connected to complete the pressure relief.

[0082] In this embodiment, by fixing the upper end of the first pressure relief component 2 (i.e., valve cap 22) to the first constriction at the upper end of the valve body 1, and setting the lower end of the first pressure relief component 2 to a second constriction, and by fixing the first constriction of the valve cap 22 and the sealing member 212 located in the second constriction (the sealing member 212 abuts against the inlet of the valve seat 11), the first pressure relief component 2 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 16), and the elastic member 23 in the first pressure relief component 2 is thus compressed to a fixed initial height. The position of the first pressure relief component 2 will not change, so the initial height of the elastic member 23 also remains unchanged, thereby achieving the function of stable pressure control.

[0083] Furthermore, since the valve cap 22 is fixed on the valve cap positioning part at the predetermined installation position, that is, the initial positions of the valve cap 22 and the seal 212 are both fixed, the initial height of the elastic element 23 remains unchanged, and its elastic force can always be stable at a rated value; when the temperature rises in the container interface 12, the push rod 32 of the temperature sensing element 3 moves upward. When the temperature reaches the rated value, the push rod 32 of the temperature sensing element 3 will push the piston core 211 and the seal 212 upward, thereby compressing the elastic element 23 upward; when the pressure in the container interface 12 exceeds the rated value, the high-pressure fluid will also push the piston core 211 and the seal 212 upward, and automatically release pressure through the first pressure relief port 13.

[0084] Furthermore, due to the clearance fit between the valve stem 214 and the piston core 211, the valve stem 214 remains stationary during automatic pressure relief, i.e., when the piston core 211 actively moves upward. When the handle 24 moves upward, it drives the valve stem 214, which, through the second constriction of the sealing seat 213, drives the piston core 211 and the seal 212 upward. The seal 212 moves away from the inlet of the valve seat 11, and simultaneously the container interface 12 connects to the pressure relief chamber 16, completing manual pressure relief. This allows for both automatic and manual pressure relief without interference.

[0085] 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 (12) and a first pressure relief port (13) respectively; a valve seat (11) is detachably disposed inside the valve body (1), the valve seat (11) has a valve seat body (111) and an inlet that surrounds and forms a hollow space, the container interface (12) and the first pressure relief port (13) are connected through the inlet; The first pressure relief assembly (2) 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 (2) abuts against the inlet of the valve seat (11) for opening / closing the inlet; A temperature sensing element (3) is disposed opposite to the first pressure relief assembly (2) across the inlet, and is used to push the first pressure relief assembly (2); The fixing member (4) is separately provided from the valve seat (11), and the fixing member (4) is detachably installed between the inner wall of the valve body (1) and the temperature sensing element (3) for fixing the temperature sensing element (3) and the valve body (1).

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 fastener (4) includes: The first arc-shaped plate (41) has a snap-fit ​​groove (411), and the temperature-sensing shell (31) is fixed in the snap-fit ​​groove (411); The second arc-shaped plate (42) is fixed between the outer side of the first arc-shaped plate (41) and the inner wall of the valve body (1).

4. The temperature and pressure safety valve according to claim 3, characterized in that, The valve body (1) has a fixing groove (14) on its inner wall surface, and the end of the second arc plate (42) is fixed in the fixing groove (14).

5. The temperature and pressure safety valve according to any one of claims 1-4, characterized in that, The valve seat (11) has a valve seat body (111) and a threaded head (112), the threaded head (112) is disposed toward the container interface (12), and a corresponding internal thread structure is formed on the inner wall of the valve body (1).

6. The temperature and pressure safety valve according to claim 5, characterized in that, A valve seat step portion (113) is formed at the connection position between the valve seat body (111) and the threaded head (112). A corresponding boss is formed on the inner wall of the valve body (1). A valve seat sealing ring (114) is fitted on the valve seat step portion (113).

7. The temperature and pressure safety valve according to claim 5, characterized in that, The upper edge of the mounting groove (14) of the fastener is flush with the lower edge of the threaded head (112).

8. The temperature and pressure safety valve according to claim 5, characterized in that: Also includes: A second pressure relief port (15) is provided on the valve body (1), and the second pressure relief port (15) is connected to the pressure relief chamber (16) via the inlet of the valve seat (11); The second pressure relief assembly (5) is located at the second pressure relief port (15) and is used to switch between connecting / isolating the pressure relief chamber (16) and the second pressure relief port (15).

9. The temperature and pressure safety valve according to claim 8, characterized in that, The second pressure relief assembly (5) includes: The housing (51) is fixed at the second pressure relief port (15), 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).

10. The temperature and pressure safety valve according to claim 8, characterized in that, The second pressure relief port (15) is positioned opposite to the first pressure relief port (13).

11. The temperature and pressure safety valve according to claim 5, characterized in that, The first pressure relief assembly (2) includes a piston (21), which includes a piston core (211) and a seal (212). The piston core (211) is disposed corresponding to the second end of the push rod (32), and the piston core (211) is made of rigid material. The seal (212) is sleeved on the outer surface of the piston core (211) and is disposed corresponding to the inlet edge of the valve body (1). The seal (212) is made of elastic material.

12. The temperature and pressure safety valve according to claim 11, characterized in that, The first pressure relief assembly (2) further includes: A valve cap (22) is located inside the valve body (1) and on the side of the piston (21) away from the valve seat (11). A valve cap positioning part is provided on the inner wall of the valve body (1). The valve cap (22) is sealed and fixed to the valve cap positioning part of the valve body (1). The elastic element (23) has two ends that abut against the valve cap (22) and the piston element (21), respectively.

13. The temperature and pressure safety valve according to claim 12, characterized in that, The valve cap positioning part includes at least a first constriction, which is opened at the end of the valve body (1) away from the container interface (12) and communicates with the pressure relief chamber (16). The valve cap is fixed in the first constriction.

14. The temperature and pressure safety valve according to claim 13, characterized in that, The piston component (21) also includes: A sealing seat (213) has a hollow guide hole (2131). The piston core (211) and the sealing element (212) are fixed inside the guide hole (2131) on the side near the valve seat (11). The side of the guide hole (2131) away from the valve seat (11) is formed as a second constriction. A valve stem (214) has a flange (2141) at one end. The flange (2141) of the valve stem (214) is limited to the second constriction of the guide hole (2131). The other end of the valve stem (214) is sealed through the valve cap (22) and linked to a handle (24). The valve stem (214) and the piston core (211) are in clearance fit.

15. The temperature and pressure safety valve according to claim 4, characterized in that, The temperature sensing element (3) also includes: The movable seal (33) is provided with a temperature-sensitive material (34) inside the temperature-sensitive housing (31). When the vacuum degree inside the temperature-sensitive housing (31) is a preset vacuum degree, the movable seal (33) is riveted to the temperature-sensitive housing (31) and the movable seal (33) is sealed on the temperature-sensitive material (34). The first end of the push rod (32) abuts against and fits against the side of the movable seal (33) away from the temperature-sensitive material (34).

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