Pressure release valve

Abstract

The utility model relates to the technical field of valves, in particular to a pressure relief valve which comprises a shell body and an integrated valve element, and the shell body comprises a main flow channel, an installation channel and a pressure relief opening which are sequentially communicated. The integrated valve element comprises a valve element body, an elastic piece and a connecting piece, a sealing plate is arranged at the bottom of the valve element body, a first limiting structure is arranged at the top of the valve element body, a through hole is formed in the middle of the connecting piece, the valve element body movably penetrates through the through hole of the connecting piece, and the connecting piece is located below the first limiting structure. The elastic piece is arranged between the connecting piece and the closing plate; the outer side of the connecting piece is detachably connected with the mounting channel, and the sealing plate is used for sealing a water inlet of the mounting channel. Through the arrangement of the integrated valve core, the assembly steps are reduced, the convenience of assembly and installation of the pressure release valve is improved, and the working efficiency of pipeline laying is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a pressure relief valve. Background Technology

[0002] Pipeline water transport is indispensable in both daily life and industrial production. However, in actual use, special situations often arise, such as the use of booster pumps, freezing in cold weather, and rising temperatures in hot weather. These scenarios can cause the pressure in the pipeline to rise, even exceeding the maximum working pressure of the pipe, leading to pipe rupture. This is a major pain point in the pipeline transportation field. Therefore, pressure relief valves are commonly installed to solve this problem.

[0003] A Chinese patent discloses a pressure-reducing valve, comprising a valve body with a receiving space on one side, a feed port on the side of the valve body away from the receiving space, a discharge port communicating with the receiving space on the side of the valve body, a valve cover on the side of the valve body away from the feed port, and a connecting sleeve on the side of the valve body away from the valve cover. The connecting sleeve has a through hole aligned with the feed port. The receiving space contains a valve core body structure for sealing the through hole and a pressure-reducing structure for regulating pressure. The valve core body structure includes a piston rod disposed within the receiving space, and the pressure-reducing structure includes a spring and a clamping sleeve disposed within the receiving space. The clamping sleeve is disposed on the side of the piston rod away from the valve cover. One end of the spring abuts against the clamping sleeve, and the other end of the spring abuts against the valve cover. However, this pressure-reducing valve uses a segmented valve core body design, requiring multiple specialized tools such as spring compressors, tweezers, bolt tensioners, and impact wrenches for assembly, resulting in numerous procedures and significantly impacting pipeline assembly efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the cumbersome assembly and installation process of the existing technology, and to provide a pressure relief valve with a simple structure that is easy to assemble and install, which is beneficial to improving the efficiency of pipeline assembly and installation.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A pressure relief valve is provided, comprising a housing body and an integrated valve core. The housing body includes a main flow channel, an installation channel, and a pressure relief port connected sequentially. The integrated valve core includes a valve core body, an elastic element, and a connecting element. The valve core body has a sealing plate at its bottom and a first limiting structure at its top. The connecting element has a through hole in its middle. The valve core body is movably inserted through the through hole of the connecting element, and the connecting element is located below the first limiting structure. The elastic element is installed between the connecting element and the sealing plate. The outer side of the connecting element is detachably connected to the installation channel, and the sealing plate is used to seal the water inlet of the installation channel.

[0007] With this setup, during production, the factory or user can first release the first limiting structure on the valve core body, then sequentially fit the elastic element and the connecting element onto the valve core body, and finally limit the top of the connecting element through the first limiting structure, thus completing the assembly of the integrated valve core. At this time, the elastic element provides a reverse movement tendency elastic force to the connecting element and the sealing plate respectively. In use, the user first connects the main channel of the outer shell body to the water channel to be installed, and then connects the assembled integrated valve core connecting element to the installation channel through snap-fit ​​or threaded connection, thus completing the installation. The installation is simple and convenient. After installation, the sealing plate of the integrated valve core, pushed by the elastic element, abuts against the inlet of the installation channel, sealing the inlet. At this time, the installation channel and the main channel are not connected. Simultaneously, the connecting piece closes the installation channel, creating a space within the installation channel that only communicates with the pressure relief port. When the pressure in the main channel exceeds a preset value, the sealing plate blocking the inlet of the installation channel experiences water pressure greater than the elastic force of the elastic element. The elastic element compresses, the valve core body is lifted, and some water in the main channel enters the installation channel and is discharged through the pressure relief port connected to the installation channel, thus achieving the pressure relief effect. The pressure relief valve provided by this utility model has a simple structural design, is easy to manufacture and install, requires few tools, and greatly improves the efficiency of pipeline installation.

[0008] Preferably, the sealing plate is detachably connected to the valve core body, the first limiting structure is an annular structure, the diameter of the first limiting structure is larger than the diameter of the through hole, and the diameter of the valve core body located below the first limiting structure is smaller than or equal to the diameter of the through hole.

[0009] The connection method between the sealing plate and the valve core body includes, but is not limited to, snap-fit ​​connection, threaded connection, etc. With this setting, when assembling the integrated valve core, the factory or user can first remove the sealing plate, then pass the bottom of the valve core body through the through hole, and move the connector upward until it abuts against the first limiting structure. Then, the elastic element is inserted from the bottom of the valve core body, and finally the sealing plate is connected to the valve core body, so that the elastic element is compressed between the sealing plate and the connector, thereby completing the installation of the integrated valve core.

[0010] Preferably, a metal insert is embedded in the mounting channel, and a threaded section is provided at the bottom of the connector, the threaded section being threadedly connected to the metal insert.

[0011] This design improves the stability of the connection between the connector and the mounting channel. The metal insert has high hardness and is not easily worn, and the threaded connection improves the tightness of the connection and reduces water seepage. Users can further improve the waterproof effect by wrapping PTFE tape around the threaded section.

[0012] Preferably, the outer shell body is made of plastic, the metal insert has several injection-molded grooves on its outer side, and an anti-rotation boss is provided on the bottom of the metal insert. The metal insert and the mounting channel are integrally formed by injection molding. This design helps to reduce costs and enhance the tightness of the connection between the metal insert and the outer shell body.

[0013] Preferably, a first sealing ring is also fitted on the top of the threaded section, and the first sealing ring is interference-fitted with both the metal insert and the threaded section.

[0014] With this configuration, when the threaded section is threadedly connected to the metal insert, and the threaded section is fully screwed into the metal insert, the first sealing ring at the top of the threaded section will be compressed by the connector and the metal insert, and both the threaded section and the metal insert will be interference-fitted, filling the gap between the threaded section and the metal insert and improving the water-proof effect.

[0015] Preferably, the valve core body is further provided with a plurality of sealing grooves, each of which is provided with a second sealing ring, and the second sealing ring abuts against the inner wall of the through hole within the stroke range of the valve core body.

[0016] The stroke range of the valve core body refers to the movement of the valve core body from the state where it abuts against the inlet of the mounting plate to the state where the elastic element is under maximum compression after installation. With this design, the second sealing ring can fill the gap between the valve core body and the through hole, preventing water leakage between the valve core body and the connecting parts during pressure relief without generating excessive friction, thus improving the sealing performance of the pressure relief valve. Considering typical operating conditions of pressure relief valves, the valve will only open when the main flow pressure is greater than or equal to 1.3 MPa. At this point, the pressure provided by the water pressure is far greater than the frictional force brought by the second sealing ring, so the second sealing ring will not affect the movement of the valve core body. Furthermore, this pressure relief valve is used in emergency scenarios and is normally stationary, with the valve core body remaining stationary. Therefore, there is no issue of frequent movement of the valve core body causing wear on the second sealing ring.

[0017] Preferably, the elastic element is a compression spring structure, and metal gaskets are provided at the top and bottom of the elastic element. The elastic element abuts against the connecting member and the closing plate through the metal gaskets respectively.

[0018] With this configuration, the elastic element abuts against the connector and the sealing plate through the metal gasket, which can reduce the wear caused by displacement when the elastic element of the compression elastic structure deforms, and help improve the life of the spring.

[0019] Preferably, the bottom of the connector is further provided with a limiting groove, and part of the elastic element is inserted into the limiting groove and connected to the connector.

[0020] With this design, the limiting groove limits the periphery of the elastic element, making it easier for users to install and preventing displacement of the elastic element due to deformation when the pressure relief valve is working, which would affect the working effect.

[0021] Preferably, the connector is further provided with a hexagonal nut at the top.

[0022] With this design, the hexagonal nut, a commonly used structure, allows users to easily tighten the connector and metal insert using a common wrench, further improving the tightness of the connection between the connector and the main body of the casing.

[0023] Preferably, the first limiting structure includes a first snap-fit ​​groove and a first limiting ring formed on the valve core body, wherein the first limiting ring is detachably connected to the first snap-fit ​​groove.

[0024] With this configuration, when the elastic element, the connector, and the valve core body are assembled together, the user can remove the first limiting ring from the first snap-fit ​​groove, and then sequentially place the elastic element and the connector onto the valve core body from the top of the valve core body, pressing the connector down to make it lower than the first snap-fit ​​groove. Subsequently, the first limiting ring is placed at the first snap-fit ​​groove, and the connector rebounds under the action of the elastic element, abutting against the first limiting ring.

[0025] Preferably, the bottom of the sealing plate is provided with an installation groove, the valve core body protrudes from the sealing plate, and the valve core body below the installation groove is also provided with a second limiting structure, and a sealing gasket is embedded between the installation groove and the second limiting structure.

[0026] The sealing gasket can be made of flexible, waterproof material such as rubber, as needed. With this arrangement, the mounting groove and the second limiting structure fix the sealing gasket to the bottom of the sealing plate. The sealing plate abuts against the water inlet of the mounting channel via the sealing gasket. The flexible sealing gasket can fully fit the water inlet, reducing gaps and improving the leak-proof effect of the pressure relief valve under normal operating conditions.

[0027] Preferably, the second limiting structure includes a second limiting ring and a second snap-fit ​​groove provided on the valve core body, wherein the second limiting ring and the second snap-fit ​​groove are detachably connected.

[0028] Preferably, both the first limiting ring and the second limiting ring are snap ring structures.

[0029] Preferably, it also includes a protective cap, and the top of the connector is provided with a snap-fit ​​part. The protective cap can be fitted onto the outside of the snap-fit ​​part, and the protective cap has a space inside for the valve core body to move.

[0030] This design not only prevents the hexagonal nut from loosening due to external forces after tightening, but also ensures that the valve core has sufficient room to move, preventing external factors such as falling debris or cement inside the wall from hindering the valve core's movement and causing the pressure relief valve to fail. This further improves the reliability of the pressure relief valve.

[0031] Preferably, the protective cap is further provided with a snap-fit ​​support rod inside, the snap-fit ​​support rod is provided with a snap-fit ​​platform, the snap-fit ​​part is provided with a snap-fit ​​hole that cooperates with the snap-fit ​​platform, and the outer wall of the protective cap is provided with a disassembly hole corresponding to the position of the snap-fit ​​hole.

[0032] With this configuration, when the protective cap is connected to the locking part, the locking platform will embed into the locking hole, thus creating a movement barrier and preventing the protective cap from being pulled out. When the protective cap needs to be removed for maintenance, the user can use a strip-shaped tool to insert into the locking hole corresponding to the position of the disassembly hole, thereby pushing the locking platform in the locking hole out of the locking hole. At this time, the protective cap can be easily removed without damaging it. After the maintenance is completed, the protective cap can be reconnected to the locking part.

[0033] Preferably, the outer side of the pressure relief port is provided with a plurality of mounting grooves, and the plurality of mounting grooves form a sawtooth structure.

[0034] With this setup, when a hose for guiding overflowing water is connected to the pressure relief port, the user can tighten the hose at the mounting groove by wrapping it with steel wire, thus embedding it into the mounting groove. This prevents the hose from coming off due to excessive water pressure during pressure relief, thereby improving safety.

[0035] Compared with the prior art, the beneficial effects of this utility model are:

[0036] (1) By setting an integrated valve core, the assembly steps are reduced, the assembly and installation of the pressure relief valve are made more convenient, and the efficiency of pipeline laying is improved.

[0037] (2) The use of connectors and metal inserts makes it easy for users to assemble the integrated valve core and the outer shell, and also helps to improve the anti-leakage effect.

[0038] (3) By setting the first sealing ring, the second sealing ring, etc., the leakage prevention performance of the pressure relief valve is improved.

[0039] (4) The detachable protective cap further protects the valve core body and the hexagonal nut, preventing the pressure relief valve from failing due to external interference and improving the practicality and reliability of the pressure relief valve. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of a pressure relief valve according to the present invention;

[0041] Figure 2 This is a schematic diagram of the integrated valve core structure of a pressure relief valve according to the present invention;

[0042] Figure 3 This is a schematic diagram of the internal structure of a pressure relief valve according to the present invention;

[0043] Figure 4 This is a schematic diagram of the third embodiment of a pressure relief valve according to the present invention;

[0044] Figure 5 This is a schematic diagram of the protective cap structure of a pressure relief valve according to this utility model.

[0045] The markings in the diagram are explained below:

[0046] 1. Outer shell; 11. Main channel; 12. Mounting channel; 13. Pressure relief port; 14. Metal insert; 2. Integrated valve core; 21. Valve core body; 211. Sealing groove; 212. Second sealing ring; 213. Sealing plate; 22. Elastic element; 23. Connecting element; 231. Threaded section; 232. First sealing ring; 233. Limiting groove; 234. Hexagonal nut; 235. Snap-fit ​​part; 236. Snap-fit ​​hole; 24. First limiting structure; 241. First snap-fit ​​groove; 242. First limiting ring; 25. Second limiting structure; 251. Second snap-fit ​​groove; 252. Second limiting ring; 26. Sealing gasket; 3. Protective cap; 31. Snap-fit ​​support rod; 32. Snap-fit ​​platform; 33. Disassembly hole. Detailed Implementation

[0047] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0048] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0049] Example 1

[0050] like Figures 1 to 3 The first embodiment of the pressure relief valve of this utility model is shown, including a housing body 1 and an integrated valve core 2. The housing body 1 includes a main channel 11, an installation channel 12 and a pressure relief port 13 connected in sequence. The integrated valve core 2 includes a valve core body 21, an elastic element 22 and a connecting element 23. The bottom of the valve core body 21 is provided with a sealing plate 213 and the top of the valve core body 21 is provided with a first limiting structure 24. The connecting element 23 is provided with a through hole in the middle. The valve core body 21 is movably inserted through the through hole of the connecting element 23 and the connecting element 23 is located below the first limiting structure 24. The elastic element 22 is installed between the connecting element 23 and the sealing plate 213. The outer side of the connecting element 23 is detachably connected to the installation channel 12. The sealing plate 213 is used to seal the water inlet of the installation channel 12.

[0051] With this setup, during production, the factory or user can first release the limiting structure 24 on the valve core body 21, then sequentially fit the elastic element 22 and the connecting element 23 onto the valve core body 21, and finally limit the top of the connecting element 23 through the first limiting structure 24, thus completing the assembly of the integrated valve core 2. At this time, the elastic element 22 provides a reversible elastic force to the connecting element 23 and the sealing plate 213 respectively. When in use, the user first connects the main channel 11 of the outer shell body 1 to the water channel to be installed, and then connects the assembled integrated valve core 2's connecting element 23 to the installation channel 12 through snap-fit ​​or threaded connection. Installation is simple and convenient; after installation, the sealing plate 213 of the integrated valve core 2, pushed by the elastic element 22, abuts against the inlet of the installation channel 12, sealing the inlet. At this time, the installation channel 12 and the main channel 11 are not connected. When the pressure in the main channel 11 exceeds the preset value, the sealing plate 213 blocking the inlet of the installation channel 12 is subjected to water pressure greater than the elastic force of the elastic element 22. At this time, the elastic element 22 is compressed, the valve core body 21 is lifted, and some of the water in the main channel 11 enters the installation channel 12 and is discharged through the pressure relief port 13 connected to the installation channel 12, thereby achieving the pressure relief effect. The pressure relief valve provided by this utility model has a simple structure design, is easy to manufacture and install, requires few tools, and greatly improves the work efficiency of pipeline installation.

[0052] As one embodiment of this utility model, the sealing plate 213 is detachably connected to the valve core body 21, the first limiting structure 24 is an annular structure, the diameter of the first limiting structure 24 is larger than the diameter of the through hole, and the diameter of the valve core body 21 located below the first limiting structure 24 is smaller than or equal to the diameter of the through hole.

[0053] The connection methods between the sealing plate 213 and the valve core body 21 include, but are not limited to, snap-fit ​​connection, threaded connection, etc. With this setting, when assembling the integrated valve core 2, the factory or user can first remove the sealing plate 213, then pass the bottom of the valve core body 21 through the through hole, and move the connector 23 upward until it abuts against the first limiting structure 24. Then, the elastic member 22 is inserted from the bottom of the valve core body 21, and finally the sealing plate 213 is connected to the valve core body 21, so that the elastic member 22 is compressed between the sealing plate 213 and the connector 23, thereby completing the installation of the integrated valve core 2.

[0054] As one embodiment of this utility model, the bottom of the sealing plate 213 is provided with an installation groove, the valve core body 21 protrudes from the sealing plate 213, and the valve core body 21 below the installation groove is also provided with a second limiting structure 25, and a sealing gasket 26 is embedded between the installation groove and the second limiting structure 25.

[0055] The sealing gasket 26 can be made of flexible, waterproof material such as rubber, as needed. With this configuration, the mounting groove and the second limiting structure 25 fix the sealing gasket 26 to the bottom of the sealing plate 213. The sealing plate 213 abuts against the water inlet of the mounting channel 12 via the sealing gasket 26. The flexible sealing gasket 26 can fully fit against the water inlet, reducing gaps and improving the leak-proof effect of the pressure relief valve under normal operating conditions.

[0056] As one embodiment of the present invention, the second limiting structure 25 includes a second limiting ring 252 and a second snap-fit ​​groove 251 provided on the valve core body 21, wherein the second limiting ring 252 and the second snap-fit ​​groove 251 are detachably connected.

[0057] As one embodiment of this utility model, both the first limiting ring 242 and the second limiting ring 252 are snap ring structures.

[0058] As one embodiment of this utility model, the outer side of the pressure relief port 13 is also provided with several mounting grooves, which form a sawtooth structure.

[0059] With this setup, when the pressure relief port 13 is connected to a hose for guiding overflow water, the user can tighten the hose at the mounting groove by wrapping it with steel wire, so that it is embedded in the mounting groove. This prevents the hose from coming off due to excessive water pressure during pressure relief, thus improving safety.

[0060] Example 2

[0061] The following is a second embodiment of a pressure relief valve of the present invention. This embodiment is similar to embodiment 1, except that the structure of the mounting channel 12 and the integrated valve core 2 are different.

[0062] As one embodiment of this utility model, the mounting channel 12 is provided with a metal insert 14, and the bottom of the connector 23 is provided with a threaded section 231, which is threadedly connected to the metal insert 14.

[0063] This design improves the stability of the connection between the connector 23 and the mounting channel 12. The metal insert 14 has high hardness and is not easily worn. The threaded connection improves the tightness of the connection and reduces water seepage. Users can further improve the waterproof effect by wrapping PTFE tape around the threaded section 231.

[0064] In one embodiment of this utility model, the outer shell body 1 is made of plastic, and the outer side of the metal insert 14 is provided with several injection molding grooves. The bottom of the metal insert 14 is also provided with an anti-rotation boss. The metal insert 14 and the mounting channel 12 are integrally formed by injection molding. This arrangement helps to reduce costs and enhance the tightness of the connection between the metal insert 14 and the outer shell body 1.

[0065] As one embodiment of this utility model, a first sealing ring 232 is also sleeved on the top of the threaded section 231, and the first sealing ring 232 is interference-fitted with the metal insert 14 and the threaded section 231.

[0066] With this configuration, when the threaded section 231 is threadedly connected to the metal insert 14, when the threaded section 231 is fully screwed into the metal insert 14, the first sealing ring 232 at the top of the threaded section 231 will be compressed by the connector 23 and the metal insert 14, and both the threaded section 231 and the metal insert 14 will be interference-fitted, filling the gap between the threaded section 231 and the metal insert 14 and improving the water leakage prevention effect.

[0067] As one embodiment of this utility model, the sealing plate 213 and the valve core body 21 are integrally formed.

[0068] This configuration helps to improve the strength of the valve core body 21 and prevent the sealing plate 213 from falling off the valve core body 21. As the core component of the integrated valve core 2, the valve core body 21 plays a limiting role for the elastic element 22 and the connecting element 23. Improving the strength of the valve core body 21 helps to improve the overall structural strength of the integrated valve core 2, thereby extending the service life of the pressure relief valve.

[0069] As one embodiment of this utility model, the valve core body 21 is also provided with a plurality of sealing grooves 211, and each sealing groove 211 is provided with a second sealing ring 212. Within the stroke range of the valve core body 21, the second sealing ring 212 abuts against the inner wall of the through hole.

[0070] The stroke range of the valve core body 21 refers to the movement of the valve core body 21 from the state where it abuts against the water inlet of the mounting channel 12 after installation to the state where the elastic element 22 is under maximum compression. With this configuration, the second sealing ring 212 can fill the gap between the valve core body 21 and the through hole, preventing water leakage between the valve core body 21 and the connecting part 23 during pressure relief without generating excessive friction, thus improving the sealing performance of the pressure relief valve. Considering the typical operating conditions of a pressure relief valve, the valve will only open when the pressure in the main channel 11 is greater than or equal to 1.3 MPa. At this time, the pressure provided by the water pressure is far greater than the frictional force brought by the second sealing ring 212. Therefore, the second sealing ring 212 will not affect the movement of the valve core body 21. Furthermore, this pressure relief valve is used in emergency scenarios and is normally stationary, with the valve core body 21 remaining stationary. Therefore, there is no issue of frequent movement of the valve core body 21 causing wear on the second sealing ring 212.

[0071] As one embodiment of this utility model, the elastic element 22 is a compression spring structure. Metal gaskets are provided at the top and bottom of the elastic element 22. The elastic element 22 abuts against the connecting element 23 and the closing plate 213 respectively through the metal gaskets.

[0072] With this arrangement, the elastic element 22 abuts against the connector 23 and the closing plate 213 through the metal gasket, which can reduce the wear caused by the displacement of the elastic element 22 when it deforms in the compression elastic structure, and help improve the life of the spring.

[0073] As one embodiment of this utility model, the bottom of the connector 23 is also provided with a limiting groove 233, and part of the elastic member 22 is inserted into the limiting groove 233 and connected to the connector 23.

[0074] With this setting, the limiting groove 233 limits the periphery of the elastic element 22, which makes it easier for users to install and also prevents the elastic element 22 from being displaced due to deformation when the pressure relief valve is working, thus avoiding affecting the working effect.

[0075] As one embodiment of this utility model, the top of the connector 23 is also provided with a hexagonal nut 234.

[0076] With this configuration, the hexagonal nut 234, as a commonly used structure, allows users to tighten the connector 23 and the metal insert 14 using a common wrench, further improving the tightness of the connection between the connector 23 and the outer shell 1.

[0077] As one embodiment of the present invention, the first limiting structure 24 includes a first snap-fit ​​groove 241 and a first limiting ring 242 formed on the valve core body 21, and the first limiting ring 242 is detachably connected to the first snap-fit ​​groove 241.

[0078] With this configuration, when the elastic element 22, the connector 23 and the valve core body 21 are assembled together, the user can remove the first limiting ring 242 from the first locking groove 241, and then put the elastic element 22 and the connector 23 onto the valve core body 21 from the top of the valve core body 21 in sequence, press the connector 23 so that it is lower than the first locking groove 241, and then place the first limiting ring 242 at the first locking groove 241. The connector 23 rebounds under the action of the elastic element 22 and abuts against the first limiting ring 242.

[0079] Example 3

[0080] like Figure 4 and Figure 5 This is a third embodiment of a pressure relief valve of the present invention. This embodiment is similar to embodiment 1, except that it also includes a protective cap 3. The top of the connector 23 is also provided with a snap-fit ​​part 235. The protective cap 3 can be sleeved on the outside of the snap-fit ​​part 235. The protective cap 3 has a space inside for the valve core body 21 to move.

[0081] With this setting, the protective cap 3 can prevent the hexagonal nut 234 from loosening due to external force after tightening, and can also ensure that the valve core body 21 has enough room to move, so as to avoid the valve core body 21 from being hindered by external factors such as falling debris or cement when the pipeline is sealed in the wall, which would cause the pressure relief valve to fail, thus further improving the reliability of the pressure relief valve.

[0082] As one embodiment of this utility model, the protective cap 3 is also provided with a snap-fit ​​support rod 31 inside, a snap-fit ​​platform 32 is provided on the snap-fit ​​support rod 31, a snap-fit ​​hole 236 that cooperates with the snap-fit ​​platform 32 is provided on the snap-fit ​​part 235, and a disassembly hole 33 corresponding to the position of the snap-fit ​​hole 236 is provided on the outer wall of the protective cap 3.

[0083] With this configuration, when the protective cap 3 is connected to the snap-fit ​​part 235, the snap-fit ​​platform 32 will embed into the snap-fit ​​hole 236, thereby creating a movement barrier and preventing the protective cap 3 from being pulled out. When the protective cap 3 needs to be removed for maintenance, the user can use a strip-shaped tool to insert into the snap-fit ​​hole 236 corresponding to the position of the disassembly hole 33 through the disassembly hole 33, thereby pushing the snap-fit ​​platform 32 in the snap-fit ​​hole 236 out of the snap-fit ​​hole 236. At this time, the protective cap 3 can be easily removed without damaging it. After the maintenance is completed, the protective cap 3 can be reconnected to the snap-fit ​​part 235.

[0084] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. 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 pressure relief valve, comprising a housing body (1), wherein the housing body (1) has a main flow channel (11), an installation channel (12), and a pressure relief port (13) connected sequentially therein, characterized in that, It also includes an integrated valve core (2), which includes a valve core body (21), an elastic element (22), and a connector (23). The valve core body (21) has a sealing plate (213) at the bottom and a first limiting structure (24) at the top. The connector (23) has a through hole in the middle. The valve core body (21) is movably inserted through the through hole of the connector (23), and the connector (23) is located below the first limiting structure (24). The elastic element (22) is installed between the connector (23) and the sealing plate (213). The outer side of the connector (23) is detachably connected to the installation channel (12), and the sealing plate (213) is used to seal the water inlet of the installation channel (12).

2. The pressure relief valve according to claim 1, characterized in that, The mounting channel (12) is embedded with a metal insert (14), and the bottom of the connector (23) is provided with a threaded section (231), which is threadedly connected to the metal insert (14).

3. The pressure relief valve according to claim 2, characterized in that, The top of the threaded section (231) is also fitted with a first sealing ring (232), and the first sealing ring (232) is interference-fitted with the metal insert (14) and the threaded section (231).

4. The pressure relief valve according to claim 1, characterized in that, The valve core body (21) is also provided with a number of sealing grooves (211), and each sealing groove (211) is provided with a second sealing ring (212). Within the stroke range of the valve core body (21), the second sealing ring (212) abuts against the inner wall of the through hole.

5. The pressure relief valve according to claim 1, characterized in that, The elastic element (22) is a compression spring structure. Metal gaskets are provided at the top and bottom of the elastic element (22). The elastic element (22) abuts against the connector (23) and the closing plate (213) respectively through the metal gaskets.

6. The pressure relief valve according to claim 5, characterized in that, The bottom of the connector (23) is also provided with a limiting groove (233), and part of the elastic element (22) is inserted into the limiting groove (233).

7. The pressure relief valve according to claim 1, characterized in that, The first limiting structure (24) includes a first snap-fit ​​groove (241) and a first limiting ring (242) formed on the valve core body (21), and the first limiting ring (242) is detachably connected to the first snap-fit ​​groove (241).

8. The pressure relief valve according to claim 1, characterized in that, The bottom of the sealing plate (213) is provided with an installation groove, the valve core body (21) protrudes from the sealing plate (213), and a second limiting structure (25) is also provided on the valve core body (21) below the installation groove. A sealing gasket (26) is embedded between the installation groove and the second limiting structure (25).

9. The pressure relief valve according to claim 1, characterized in that, It also includes a protective cap (3), and the top of the connector (23) is provided with a snap-fit ​​part (235). The protective cap (3) can be sleeved on the outside of the snap-fit ​​part (235), and the protective cap (3) has a space inside for the valve core body (21) to move.

10. The pressure relief valve according to claim 9, characterized in that, The protective cap (3) is also provided with a snap-fit ​​support rod (31) inside. The snap-fit ​​support rod (31) is provided with a snap-fit ​​platform (32). The snap-fit ​​part (235) is provided with a snap-fit ​​hole (236) that cooperates with the snap-fit ​​platform (32). The outer wall of the protective cap (3) is provided with a disassembly hole (33) that corresponds to the position of the snap-fit ​​hole (236).

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