Pressure relief assembly and temperature and pressure safety valve

Abstract

This application relates to the field of valve technology, and more particularly to a pressure relief assembly and a temperature and pressure safety valve. This application provides a pressure relief assembly applied to a temperature and pressure safety valve, which includes a valve body and a valve seat. The valve body has an interface and a pressure relief port. The valve seat is disposed within the valve body and has a first port and a second port disposed opposite to each other. The pressure relief assembly includes a valve core and an elastic element. When the valve core is in the first position, it abuts against the second port, isolating the second port from the pressure relief port. When the valve core moves from the first position away from the valve seat or from the direction away from the valve seat towards the first position, the second port communicates with the pressure relief port. The elastic element is used to elastically press the valve core to the first position. A guide portion is provided on the side of the valve core facing the second port. When the valve core is in the first position, the inner peripheral wall of the guide portion abuts against the outer peripheral wall of the second port. This reduces the offset of the movement direction of the pressure relief assembly and improves the sealing effect between the pressure relief assembly and the valve seat.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a pressure relief component and 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, and a pressure relief assembly. The valve seat and the pressure relief assembly are located in the valve body. When the pressure inside the container exceeds the set pressure, it pushes the pressure relief assembly to move, connecting the pressure relief port and the container interface to achieve pressure relief. When the temperature inside the container exceeds the set temperature, the temperature sensing material in the temperature sensing element expands, pushing the push rod to press the pressure relief assembly to move, connecting the pressure relief port and the container interface to achieve pressure relief.

[0003] During the pressure relief process of the temperature and pressure safety valve, the pressure relief component may be eccentric, resulting in poor sealing between the pressure relief component and the valve seat. This can cause the pressure to start relieving pressure before the set value is reached, affecting the product's service life. Utility Model Content

[0004] This application provides a pressure relief assembly and a temperature and pressure safety valve, which can reduce the offset of the movement direction of the pressure relief assembly and improve the sealing effect between the pressure relief assembly and the valve seat.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include:

[0006] In a first aspect, embodiments of this application provide a pressure relief assembly applied to a temperature and pressure safety valve. The temperature and pressure safety valve includes a valve body and a valve seat. The valve body has an interface and a pressure relief port. The valve seat is disposed within the valve body and has a first port and a second port disposed opposite to each other. The pressure relief assembly includes a valve core and an elastic element. When the valve core is in a first position, the valve core abuts against the second port, isolating the second port from the pressure relief port. When the valve core moves from the first position away from the valve seat or moves from the direction away from the valve seat towards the first position, the second port communicates with the pressure relief port. The elastic element is used to elastically press the valve core to the first position. A guide portion is provided on the side of the valve core facing the second port. When the valve core is in the first position, the inner peripheral wall of the guide portion abuts against the outer peripheral wall of the second port.

[0007] The temperature and pressure safety valve proposed in this application has a guide portion on the side of the valve core facing the second port. After the temperature and pressure safety valve releases pressure, the valve core moves towards the second port under the action of elastic force. When the valve core moves close to the second port, the guide portion is sleeved on the outer peripheral wall of the second port. The guide portion provides guidance for the valve core to continue moving towards the second port until the valve core can seal against the second valve port, reducing the deviation of the valve core's movement direction, improving the sealing effect between the valve core and the valve seat, thereby improving the performance of the product.

[0008] Optionally, when the valve core moves from a direction away from the valve seat to the first position, and the guide portion coincides with the valve seat along the axial direction of the valve body, the inner peripheral wall of the guide portion slides against the outer peripheral wall of the second port to restrict the pressure relief assembly from moving along the axial direction of the valve body.

[0009] In the above scheme, the inner peripheral wall of the guide portion slides against the outer peripheral wall of the second port, which can reduce the radial offset of the pressure relief assembly in the valve body when it moves axially along the valve body, thereby improving the sealing effect between the valve core and the valve seat.

[0010] Optionally, the valve core includes a sealing seat and a first sealing element. The sealing seat includes a first bottom wall and a first peripheral wall. The first peripheral wall surrounds the first bottom wall, and the first bottom wall and the first peripheral wall form a receiving groove. The side of the first peripheral wall away from the first bottom wall is configured as a guide portion. The first sealing element is disposed in the receiving groove to selectively abut against the second port.

[0011] In the above scheme, the first seal is disposed within the receiving groove, and the fastener passes through the first seal and the first bottom wall and is threadedly connected to the peripheral wall of the support. When the pressure relief port and the interface are in an isolated state, the first seal abuts against the second port of the valve seat to seal.

[0012] Optionally, the valve core further includes a support seat and a fastener, the support seat abutting against one end of the elastic element; the fastener passes through the first seal and the seal seat and is connected to the support seat.

[0013] In the above scheme, the support seat provides support for the valve stem and the elastic element, and the fastener is used to fix the sealing seat and the first sealing element to the support seat.

[0014] Optionally, the valve core further includes a valve stem passing through the elastic member, one end of the valve stem being connected to the valve core, and the other end of the valve stem extending out of the valve body.

[0015] Secondly, this application also provides a temperature and pressure safety valve, including a temperature sensing component and a pressure relief component as described in any of the above embodiments. One end of the temperature sensing component extends into the valve body, and the temperature sensing component is adapted to push the valve core to move away from the valve seat when the temperature rises, so as to connect the second port with the pressure relief port.

[0016] In this embodiment of the temperature and pressure safety valve, when the pressure inside the container is too high, the pressure relief component disengages from the second port of the valve seat. The second port is connected to the pressure relief port for pressure relief. When the pressure inside the container returns to normal, the pressure relief component moves towards the valve seat under the action of the elastic element. When the pressure relief component moves to the point where the inner peripheral wall of the guide portion abuts against the outer peripheral wall of the second port, the guide portion provides guidance for the movement of the pressure relief component towards the valve seat, reducing the deviation in the direction of movement of the pressure relief component, thereby improving the sealing performance between the pressure relief component and the valve seat. When the temperature inside the container is too high, the temperature sensing component pushes the valve core to move away from the valve seat, and the pressure relief component disengages from the second port. The second port is connected to the pressure relief port to dissipate the heat inside the container, thereby improving the service life of the valve.

[0017] Optionally, the valve body includes a valve body and a valve cover, the valve seat is detachably connected to the valve body, the valve body has the interface, the pressure relief port and the opening, the interface and the opening are arranged opposite to each other along the axial direction of the valve body, and the valve cover is disposed on the opening.

[0018] Optionally, the temperature and pressure safety valve further includes a diaphragm, one end of which is sandwiched between the valve body and the valve cover, and the other end of which is fixed to the valve core to separate the pressure relief port from the space where the elastic element is located.

[0019] In the above scheme, the diaphragm separates the pressure relief port from the cavity where the elastic element is located, thereby achieving a seal on the elastic element. When the pressure relief assembly releases pressure, the liquid in the container will not affect the elastic element, thereby reducing corrosion such as rust on the elastic element.

[0020] Optionally, the diaphragm includes a fourth bottom wall, a third peripheral wall, and a top wall. Along the axial direction of the valve body, the fourth bottom wall is connected to one end of the third peripheral wall and fixed to the valve core, and the top wall is connected to the other end of the third peripheral wall and partially sandwiched between the valve body and the valve cover. The top wall is arc-shaped.

[0021] In the above scheme, the top wall is constructed in an arc shape. When the pressure relief assembly moves along the axial direction of the valve body away from the second port, the second section deforms, providing travel space for the movement of the pressure relief assembly.

[0022] Optionally, the temperature and pressure safety valve further includes a pressure regulating part, one end of which is threadedly connected to the valve body along the axial direction of the valve body, and the other end of which abuts against the end of the elastic element away from the valve core.

[0023] In the above scheme, the pressure regulating part is threadedly connected to the valve cover. The compression of the elastic element can be adjusted by adjusting the position of the pressure regulating part relative to the valve cover, thereby realizing the adjustment of different pressure relief pressures of the temperature and pressure safety valve. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a cross-sectional view of the temperature and pressure safety valve of this application;

[0026] Figure 2 for Figure 2 Enlarged view of region A in the middle;

[0027] Figure 3 This is a schematic diagram of the temperature sensing component of this application;

[0028] Figure 4 This is a perspective view of the temperature and pressure safety valve of this application.

[0029] [Explanation of Labels in the Attached Image]

[0030] 1: Valve body; 11: Interface; 12: Pressure relief port; 13: Valve body; 14: Valve cover; 15: Opening;

[0031] 2: Valve seat; 21: First port; 22: Second port; 23: Support part; 231: First through hole; 232: Connecting section; 233: Support section;

[0032] 3: Pressure relief assembly; 30: Valve core; 31: Elastic element; 32: Guide portion; 33: Sealing seat; 33a: First bottom wall; 33b: First peripheral wall; 34: First seal; 35: Support seat; 35a: Second bottom wall; 35b: Second peripheral wall; 35c: Third bottom wall; 35d: First receiving cavity; 36: Fastener; 37: Valve stem; 38: Diaphragm; 381: Fourth bottom wall; 382: Third peripheral wall; 383: Top wall;

[0033] 4: Temperature sensing component; 41: Housing; 42: Temperature sensing material; 43: Push rod; 44: Second seal;

[0034] 5: Pressure regulating part; 50: Second through hole; 51: Pressure regulating screw; 511: First stepped surface; 53: Pressure regulating seat;

[0035] 6: Handle; 7: Nameplate; 8: Sealing gasket;

[0036] X: Axial direction of valve body; Y: Radial direction of valve body. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0039] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0042] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0043] A temperature and pressure safety valve specifically refers to a valve that integrates pressure and temperature limiting, capable of resolving overpressure and overtemperature issues in containers in one go. The pressure and temperature limiting functions can be triggered independently or simultaneously. Using a temperature and pressure safety valve can prevent the container's lifespan from being affected by excessively high temperatures or pressures. Suitable containers for temperature and pressure safety valves include pressurized solar water heaters, electric water heaters, and gas-fired water heaters.

[0044] During the pressure relief process of the temperature and pressure safety valve, the pressure relief component presses against the elastic element to relieve pressure, and then returns to the position of abutting the valve seat under the elastic force of the elastic element. When the pressure relief component returns to the position of abutting the valve seat, there may be eccentricity, which will cause the pressure relief component and the valve seat to not be sealed tightly. This will cause the pressure relief to start to relieve pressure before the temperature or pressure range reaches the set value, which will affect the service life of the product.

[0045] In view of this, this application develops a temperature and pressure safety valve that can guide and position the seal between the pressure relief component and the valve seat, and can accurately release the pressure and heat inside the container to ensure the normal service life of the container.

[0046] This application provides a temperature and pressure safety valve, which includes a valve body 1, a valve seat 2, a pressure relief assembly 3, and a temperature sensing assembly 4. The valve body 1 is provided with an interface 11 for connecting to a container and a pressure relief port 12 for pressure relief. The valve seat 2 is disposed inside the valve body 1 and has a first port 21 and a second port 22 disposed opposite to each other. The first port 21 of the flow channel of the valve seat 2 is connected to the interface 11.

[0047] The valve body 1 includes a valve body 13 and a valve cover 14. The valve seat 2 is detachably connected to the valve body 13. The valve body 13 has an interface 11, a pressure relief port 12 and an opening 15. Along the axial direction X of the valve body 1, the interface 11 and the opening 15 are arranged opposite to each other. The valve cover 14 is sealed and covered by the opening of the valve cover 14.

[0048] The pressure relief assembly 3 is selectively abutted against the second port 22 to connect or disconnect the second port 22 and the pressure relief port 12. One end of the temperature sensing assembly 4 extends into the valve body 1, and the temperature sensing assembly 4 is adapted to push the pressure relief assembly 3 away from the valve seat 2 when the temperature rises, so as to connect the second port 22 and the pressure relief port 12.

[0049] When the pressure inside the container is too high, the pressure relief component 3 disengages from the second port 22 of the valve seat 2, which then connects to the pressure relief port 12 to relieve pressure. When the pressure inside the container returns to normal, the pressure relief component 3 moves towards the valve seat 2 until it abuts against the second port 22, disconnecting the second port 22 from the pressure relief port 12 and stopping pressure relief. When the temperature inside the container is too high, the temperature sensing component 4 pushes the pressure relief component 3 away from the valve seat 2, disengaging the pressure relief component 3 from the second port 22, which then connects to the pressure relief port 12, dissipating heat from the container and thus extending its service life. When the temperature inside the container returns to normal, the pressure relief component 3 moves towards the valve seat 2 until it abuts against the second port 22, disconnecting the second port 22 from the pressure relief port 12 and stopping heat dissipation.

[0050] This application provides a pressure relief component 3, as shown in the following embodiments. Figure 1 and Figure 2 The pressure relief assembly 3 includes a valve core 30 and an elastic element 31. When the valve core 30 is in the first position, the valve core 30 abuts against the second port 22, separating the second port 22 from the pressure relief port 12. When the valve core 30 moves from the first position away from the valve seat 2 or moves from the direction away from the valve seat 2 towards the first position, the second port 22 communicates with the pressure relief port 12. The elastic element 31 is used to elastically press the valve core 30 to the first position. The guide portion 32 is provided on the side of the valve core 30 facing the second port 22. When the valve core 30 is in the first position, the inner peripheral wall of the guide portion 32 abuts against the outer peripheral wall of the second port 22.

[0051] When the pressure relief assembly 3 is disengaged from the second port 22 of the valve seat 2 to relieve pressure, the second port 22 is connected to the pressure relief port 12; when the pressure relief assembly 3 is in the first position and abuts against the second port 22 of the valve seat 2, the second port 22 is isolated from the pressure relief port 12.

[0052] The elastic element 31 presses against one end of the valve core 30, selectively abutting the side of the valve core 30 away from the elastic element 31 against the second port 22 of the valve seat 2. In other words, the elastic element 31 presses the valve core 30 against the first position. The guide portion 32 is connected to the side of the valve core 30 facing the second port 22. When the valve core 30 is in the first position abutting against the second port 22, the guide portion 32 engages with the outer circumferential surface of the second port 22. When the pressure inside the container exceeds a predetermined pressure, the valve core 30 disengages from the second port 22 under pressure, pressing against the elastic element 31. This connects the interface 11, the first port 21, the second port 22, and the pressure relief port 12 for pressure relief. When the pressure inside the container is less than or equal to the predetermined pressure, the valve core 30 moves towards the second port 22 under the restoring force of the elastic element 31 until it abuts against the second port 22.

[0053] In this embodiment of the temperature and pressure safety valve, a guide portion 32 is provided on the side of the valve core 30 facing the second port 22. After the temperature and pressure safety valve has finished depressurizing, the valve core 30 moves toward the second port 22 under the action of elastic force. When the valve core 30 moves close to the second port 22, the guide portion 32 is sleeved on the outer peripheral wall of the second port 22. The guide portion 32 provides guidance and positioning for the valve core 30 to continue moving toward the second port 22 until the valve core 30 can seal against the second valve port, reducing the deviation of the valve core 30's moving direction, improving the sealing effect between the valve core 30 and the valve seat 2, thereby improving the performance of the product.

[0054] Optionally, when the valve core 30 moves from a direction away from the valve seat 2 to the first position, and the guide portion 32 coincides with the valve seat 2 along the axial X direction of the valve body 1, the inner peripheral wall of the guide portion 32 slides against the outer peripheral wall of the second port 22 to restrict the pressure relief assembly 3 from moving along the axial X direction of the valve body 1.

[0055] Specifically, when the valve core 30 moves from the pressure relief position away from the valve seat 2 toward the first position, the end face of the guide portion 32 away from the valve core 30 is flush with the end face of the first port 22 until the valve core 30 moves to the first position. The inner peripheral wall of the guide portion 32 slides against the outer peripheral wall of the second port 22 to reduce the directional offset of the pressure relief assembly 3 when it moves along the axial direction X of the valve body 1. In other words, the inner peripheral wall of the guide portion 32 slides against the outer peripheral wall of the second port 22, which can reduce the offset of the pressure relief assembly 3 in the radial direction Y of the valve body 1 when it moves along the axial direction X of the valve body 1, thereby improving the sealing effect between the valve core 30 and the valve seat 2.

[0056] Optionally, refer to Figure 2The valve core 30 includes a sealing seat 33 and a first sealing element 34. The sealing seat 33 includes a first bottom wall 33a and a first peripheral wall 33b. The first peripheral wall 33b surrounds the first bottom wall 33a. The first bottom wall 33a and the first peripheral wall 33b form a receiving groove. The side of the first peripheral wall 33b away from the first bottom wall 33a is configured as a guide portion 32. The first sealing element 34 is disposed in the receiving groove to selectively abut against the second port 22.

[0057] The first bottom wall 33a and the first peripheral wall 33b of the sealing seat 33 define a receiving groove for receiving the first seal 34, so as to stably hold the first seal 34 within the sealing seat 33. When the pressure relief port 12 is isolated from the interface 11, the pressure relief assembly 3 is in the first position, the first seal 34 abuts and seals against the second port 22 of the valve seat 2, and the inner peripheral wall of the guide portion 32 abuts against the outer peripheral wall of the valve seat 2.

[0058] The first seal 34 is made of rubber, which can improve the sealing effect of the first seal 34 on the second port 22, thereby improving the sealing and isolation effect between the interface 11 and the pressure relief port 12.

[0059] For example, the first peripheral wall 33b includes a first vertical section, a horizontal section and a second vertical section. The first vertical section is connected to the first bottom wall 33a, the horizontal section is connected between the first vertical section and the second vertical section, and the second vertical section is a guide portion 32. Both the first vertical section and the second vertical section extend along the axial direction X of the valve body 1, and the horizontal section extends along the radial direction Y of the valve body 1 in a direction away from the first seal 34, so that the inner peripheral wall of the guide portion 32 is suitable for abutting against the outer peripheral wall of the valve seat 2, and does not affect the abutment seal between the first seal 34 and the second port 22.

[0060] Optionally, refer to Figure 2 The valve core 30 also includes a support seat 35 and a fastener 36. The support seat 35 abuts against one end of the elastic member 31. The fastener 36 passes through the first seal member 34 and the seal seat 33 and is connected to the support seat 35.

[0061] Fastener 36 secures the first seal 34 and the sealing seat 33 to the support seat 35 to reduce the displacement or detachment of the first seal 34. One end of the elastic member 31 abuts against the support seat 35, and the elastic member 31 applies a force to the support seat 35, causing the valve core 30 to press against the second port 22.

[0062] Specifically, the outer peripheral surface of the fastener 36 is provided with a limiting groove, and the sealing seat 34 and the first sealing member 34 are sleeved in the limiting groove. The limiting groove clamps the sealing seat 34 and the first sealing member 34 along the two side walls of the valve body 1 along the axial direction X, thereby further reducing the offset or detachment of the first sealing member 34.

[0063] The fastener 36 can be made of metal. On the one hand, this can prevent the top rod 43 of the temperature sensing component from puncturing the fastener 36 during long-term use, thereby improving the service life of the fastener 36. On the other hand, because the fastener 36 is relatively hard, no pre-compression will occur when the top rod 43 contacts the fastener 36, so that the top rod 43 can push the entire pressure relief component 3 to move away from the second port 22 in a timely manner, reducing the time difference caused by pre-compression, thereby ensuring that the pressure relief opening time is relatively timely.

[0064] Optionally, the valve core 30 further includes a valve stem 37, one end of which is connected to the valve core 30, and the other end of which extends out of the valve body 1. An elastic element 31 is sleeved on the valve stem 37. One end of the valve stem 37 is connected to the valve core 30, and the other end extends out of the valve body 1. The elastic element 31 is sleeved on the valve stem 37, with one end abutting against the valve body 1 and the other end abutting against the valve core 30.

[0065] The support seat 35 provides support for the valve stem 37 and the elastic element 31. The fastener 36 passes through the first seal 34 and the first bottom wall 33a and is threaded into the second peripheral wall 35b to fix the first seal 34 and the sealing seat 33 to the support seat 35.

[0066] Specifically, refer to Figure 2 The support base 35 includes a second bottom wall 35a, a second peripheral wall 35b, and a third bottom wall 35c. The second peripheral wall 35b surrounds the second bottom wall 35a and forms a first receiving cavity 35d. The third bottom wall 35c is located at the end of the second peripheral wall 35b away from the second bottom wall 35a. Along the axial direction X of the valve body 1, the second bottom wall 35a and the third bottom wall 35c are arranged opposite each other, and the projections of the second bottom wall 35a and the third bottom wall 35c do not coincide. One end of the valve stem 37 is located in the first receiving cavity 35d and is adapted to abut against the second bottom wall 35a. A portion of the fastener 36 extends into the first receiving cavity 35d and is threadedly engaged with the second peripheral wall 35b. One end of the elastic member 31 is sleeved on the second peripheral wall 35b and abuts against the third bottom wall 35c.

[0067] Specifically, the second bottom wall 35a and the second peripheral wall 35b enclose a first receiving cavity 35d. The second bottom wall 35a has a mounting hole, and the valve stem 37 has a valve stem body and an abutment portion. The valve stem body passes through the mounting hole on the second bottom wall 35a and connects to the abutment portion. The abutment portion abuts against the second bottom wall 35a within the first receiving cavity 35d. The third bottom wall 35c is connected to the side of the third peripheral wall 382 away from the second bottom wall 35a, and the second bottom wall 35a extends in a direction away from the first receiving cavity 35d for the elastic member 31 to abut against.

[0068] refer to Figure 2The pressure relief assembly 3 also includes a diaphragm 38, one end of which is sandwiched between the valve body 13 and the valve cover 14, and the other end of which is fixed to the valve core 30 to separate the pressure relief port 12 from the space where the elastic element 31 is located.

[0069] The diaphragm 38 includes a fourth bottom wall 381, a third peripheral wall 382, ​​and a top wall 383. Along the axial direction X of the valve body 1, the fourth bottom wall 381 is connected to one end of the third peripheral wall 382 and fixed to the valve core 30. The top wall 383 is connected to the other end of the third peripheral wall 382 and is partially sandwiched between the valve body 13 and the valve cover 14. The top wall 383 is arc-shaped.

[0070] Specifically, the third peripheral wall 382 surrounds the fourth bottom wall 381, and the top wall 383 is connected to the end of the third peripheral wall 382 away from the fourth bottom wall 381. Along the axial direction X of the valve body 1, the projection of the top wall 383 does not coincide with the projection of the fourth bottom wall 381. The fourth bottom wall 381 is sandwiched between the sealing seat 33 and the third bottom wall 35c. The top wall 383 abuts against the valve body 1 and the valve cover 14 to seal the valve body 1 and the valve cover 14. The end of the elastic member 31 away from the valve cover 14 is located between the second peripheral wall 35b and the third peripheral wall 382.

[0071] In other words, the top wall 383 is located between the valve body 1 and the valve cover 14 to seal the valve body 1 and the valve cover 14. The third peripheral wall 382 is connected between the fourth bottom wall 381 and the top wall 383 to isolate the pressure relief channel from the cavity where the elastic element 31 and the valve stem 37 are located, thereby achieving a seal on the elastic element 31. When the pressure relief assembly 3 releases pressure, the liquid in the container will not affect the elastic element 31, thereby reducing corrosion such as rust on the elastic element 31.

[0072] refer to Figure 2 The top wall 383 has an arc-shaped structure, meaning it has an R-angle. When the pressure relief assembly 3 moves along the axial direction X of the valve body 1 away from the second port 22, the top wall 383 deforms, providing travel space for the movement of the pressure relief assembly 3. Specifically, the diaphragm 38 can be made of rubber.

[0073] Optionally, refer to Figure 1 and Figure 3 The temperature sensing component 4 is adapted to push the valve core 30 away from the valve seat 2 when the temperature rises, so as to connect the second port 22 and the pressure relief port 12. The temperature sensing component 4 also includes a housing 41, a temperature sensing material 42 and a push rod 43. One end of the housing 41 extends into the valve body 1 and is fixed by the valve seat 2; the temperature sensing material 42 is disposed in the housing 41 and is adapted to expand in volume when the temperature rises; one end of the push rod 43 is located in the housing 41, and the other end of the push rod 43 extends out of the housing 41 to selectively abut against the valve core 30, so as to connect or disconnect the pressure relief port 12 and the interface 11.

[0074] One end of the housing 41 extends into the container, and the other end extends into the valve body 1 and is fixed to the valve seat 2. A temperature-sensing material 42 is provided inside the housing 41. One end of the push rod 43 is located inside the housing 41 and moves towards the pressure relief assembly 3 under the pressure of the temperature-sensing material 42. The other end of the push rod 43 extends out of the housing 41 and selectively abuts against the pressure relief assembly 3. When the temperature inside the container exceeds the set temperature, the temperature-sensing material 42 expands, pushing the push rod 43 towards the pressure relief assembly 3. The push rod 43 pushes the valve core 30 and presses against the elastic element 31, disengaging it from the second port 22 for heat dissipation.

[0075] Currently, in large-diameter, high-displacement temperature and pressure safety valves, the elastic force required for the elastic element 31 is relatively large. To overcome the elastic force of the elastic element 31 and separate the valve core 30 from the second port 22, the diameter of the push rod 43 needs to be increased accordingly. This reduces the risk of the smaller-diameter push rod 43 bending or even breaking when pushing the valve core 30 from the second port 22 by overcoming the elastic force of the elastic element 31. At the same time, the size of the housing 41 also needs to be increased to accommodate the larger push rod 43. However, since the sizes of the push rod 43 and the housing 41 have already increased, adding a return spring to the push rod 43 further increases the size of the housing 41, making it even larger. Correspondingly, the amount of temperature-sensing material 42 filled inside the housing 41 also needs to be increased, resulting in a higher cost for the entire temperature-sensing assembly 4.

[0076] To address the above issues, the temperature sensing component 4 of this application includes a housing 41, a temperature sensing material 42, and a push rod 43. That is, a return spring is no longer provided in the temperature sensing component 4. On the one hand, this simplifies the structure of the entire temperature sensing component 4 and reduces its cost. On the other hand, since the return spring is omitted from the housing 41, the size of the housing 41 does not need to be further increased when the size of the push rod 43 and the housing 41 has already increased. This prevents the size of the housing 41 from becoming too large, thereby reducing the processing cost of the housing 41. Correspondingly, the amount of temperature sensing material 42 filled in the housing 41 no longer needs to be increased, thereby reducing the filling cost of the temperature sensing material 42 and further reducing the cost of the entire temperature sensing component 4. It should be noted that during the automatic reset after pressure relief, due to the abutment between the push rod 43 and the valve core 30, the push rod 43 can automatically move and reset along the axial direction X of the valve body 1 toward the second port 22 under the elastic force of the elastic element 31. When it moves to the point where the valve core 30 abuts against the second port 22 and the guide part 32 is sleeved on the outer peripheral surface of the valve seat 2, the push rod 43 no longer moves and resets. That is, the reset spring is omitted, and the push rod 43 can only automatically reset to this position, not automatically reset to the initial position. In other words, compared with setting a reset spring on the outside of the push rod 43, the push rod 43 in this embodiment can also automatically reset, only the reset position is different. Even if the push rod 43 cannot automatically reset to the initial position, the reset push rod 43 in this embodiment will not affect the seal between the valve core 30 and the second port 22. Therefore, the automatic reset of the push rod 43 can be guaranteed even without omitting the reset spring in the temperature sensing component 4, and the reset operation of the push rod 43 will not be affected.

[0077] Optionally, refer to Figure 3 The temperature sensing component 4 also includes a second seal 44 disposed within the housing 41. The second seal 44 is located between the temperature sensing material 42 and the push rod 43. The second seal 44 is used to seal the temperature sensing material 42 within the housing 41, reducing leakage of the temperature sensing material 42. One end of the push rod 43 disposed within the housing 41 abuts against the second seal 44. Exemplarily, the second seal 44 may be a sphere.

[0078] Optionally, refer to Figure 2 The temperature and pressure safety valve also includes a support section 23, which includes a connecting section 232 and a support section 233. The connecting section 232 is connected to the first port 21 and extends along the axial direction X of the valve body 1 in a direction away from the second port 21. The support section 233 is connected to the connecting section 232 and extends along the radial direction Y of the valve body 1. Along the axial direction X of the valve body 1, the support section 233 is provided with a first through hole 231, and the housing 41 passes through the first through hole 231.

[0079] The valve seat 2 is connected to the valve body 1 by interference fitting, and a seal is provided between the valve seat 2 and the valve body 1. The connecting section 232 extends from the first port 21 toward the direction away from the first valve port. The support section 233 is connected to the side of the connecting section 232 away from the first port 21 and extends radially Y along the valve body 1. The support section 233 is provided with a first through hole 231 extending axially X along the valve body 1. The housing 41 passes through the first through hole 231 and is connected to the support section 233. The first through hole 231 provides an installation position for the housing 41. During the movement of the push rod 43, the first through hole 231 provides stable support for the housing 41.

[0080] It is worth noting that, in order to facilitate the smooth insertion of the housing 41 of the temperature sensing component 4 into the first through hole 231, the inner diameter of the first through hole 231 needs to be slightly larger than the outer diameter of the housing 41, so that the housing 41 can be inserted into the first through hole 231 with a gap, thereby improving the convenience between the temperature sensing component 4 and the support section 233.

[0081] Meanwhile, in order to limit the housing 41 within the first through hole 231 of the support section 233, a limiting boss is provided at one end of the housing 41 that passes through the first through hole 231. When the housing 41 is inserted into the first through hole 231, the end of the limiting boss away from the first port 21 abuts against the support section 233 to improve the connection stability between the housing 41 and the support section 233. When the temperature inside the container exceeds the set temperature, the heat inside the container is transferred to the temperature-sensing material 42 through the housing 41, causing the temperature-sensing material 42 to change from a solid state to a liquid state. The volume of the temperature-sensing material 42 expands inside the housing 41, and the force of the expansion pushes the second seal 44 and the push rod 43 toward the second port 22, thereby causing the push rod 43 to push the valve core 30 so that the valve core 30 is disengaged from the second port 22, thereby connecting the interface 11 and the pressure relief port 12 for heat dissipation. It should be noted that the expansion force of the temperature-sensing material 42 pushes the valve core 30 to move away from the second port 22. Due to the interaction force between the push rod 43 and the housing 41, the housing 41 has a tendency to move away from the second port 22. That is, the housing 41 will not move towards the second port 22 in the first through hole 231 during operation, thus ensuring the stability of the position of the housing 41 in the first through hole 231.

[0082] Optionally, refer to Figure 1The temperature and pressure safety valve also includes a pressure regulating part 5, which is threaded to the valve body 1 along the axial direction X. One end of the pressure regulating part 5 is threaded to the valve body 1, and the other end abuts against the end of the elastic element 31 away from the valve core 30. The pressure regulating part 5 has a second through hole 50 through which the valve stem 37 passes. The pressure regulating part 5 is threaded to the valve cover 14. The compression of the elastic element 31 can be adjusted by adjusting the position of the pressure regulating part 5 relative to the valve cover 14, thereby realizing the adjustment of different pressure relief pressures of the temperature and pressure safety valve. The greater the compression of the elastic element 31, the greater the pressure that the pressure relief assembly 3 can withstand, and the greater the set pressure relief pressure in the container; the smaller the compression of the elastic element 31, the smaller the pressure that the pressure relief assembly 3 can withstand, and the smaller the set pressure relief pressure in the container.

[0083] Optionally, refer to Figure 1 The pressure regulating part 5 includes a pressure regulating screw 51 and a pressure regulating seat 53. Along the axial direction X of the valve body 1, one end of the pressure regulating screw 51 is threaded to the valve body 1, and the other end of the pressure regulating screw 51 is provided with a first stepped surface 511. A second through hole 50 is provided in the pressure regulating screw 51, and the pressure regulating seat 53 abuts against the first stepped surface 511. The end of the elastic member 31 away from the valve core 30 abuts against the pressure regulating seat 53.

[0084] The pressure adjusting screw 51 is threadedly connected to the valve cover 14. By adjusting the position of the pressure adjusting screw 51 relative to the valve cover 14, the position of the adjusting seat is adjusted, thereby changing the force exerted by the pressure adjusting seat 53 on the elastic element 31, and thus achieving the purpose of changing the pressure relief pressure of the temperature and pressure safety valve.

[0085] refer to Figure 4 Above the valve cover 14, a nameplate 7, a sealing gasket 8, and a handle 6 are sequentially arranged. The nameplate 7 and the sealing gasket 8 are respectively fitted onto the valve stem 37. The nameplate 7 displays information parameters of the temperature and pressure safety valve, and the sealing gasket 8 enhances the sealing effect between the valve stem 37 and the valve cover 14. When the container is not used for a long time or an abnormal situation occurs, manual pressure can be released through the handle 6. Specifically, pulling the handle 6 upwards will move the valve stem 32, overcoming the spring force of the elastic element 31, thereby ensuring the safety of the container during use.

[0086] The specific working process of the temperature and pressure safety valve in this embodiment is as follows:

[0087] First, when the temperature inside the container exceeds the set temperature but the pressure does not exceed the set pressure, the temperature-sensing material 42 inside the shell 41 changes from a solid state to a liquid state due to heat. The volume of the temperature-sensing material 42 inside the shell 41 expands. The force generated by the expansion is applied to the second seal 44 and the push rod, causing the push rod 43 to move toward the second port 22 and push the fastener 36 and the first seal 34 to separate the first seal 34 from the second port 22, thereby connecting the interface 11 on the valve body 13 with the pressure relief port 12 for pressure relief. At this time, the elastic element 31 is compressed.

[0088] When the temperature inside the container decreases, the temperature-sensing material 42 changes from a liquid state to a fixed state at the lower temperature. At this time, the volume of the temperature-sensing material 42 inside the housing 41 decreases. Under the elastic action of the elastic element 31, it drives the valve core 30 and the first seal 34 to move and reset towards the second port 22 until the first seal 34 re-seals the second port 22 of the valve seat 2, thereby isolating the interface 11 from the pressure relief port 12. At the same time, due to the abutting action between the fastener 36 and the push rod 43, when the fastener 36 moves and resets towards the second port 22, the fastener 36 can push the push rod 43 to move and reset towards the second port 22 until the first seal 34 re-seals the second port 22 of the valve seat 2. At this time, the push rod 43 no longer moves towards the second port 22.

[0089] When the pressure inside the container exceeds the set pressure but the temperature does not exceed the set temperature, the pressure acts directly on the first seal 34. Under the pressure, the elastic force of the elastic element 31 is overcome, and the first seal 34 is pushed away from the second port 22 to separate from it, connecting the interface 11 and the pressure relief port 12, thus completing the automatic pressure relief of the container. When the pressure inside the container drops to the set pressure, the elastic force of the elastic element 31 drives the valve core 30 and the first seal 34 to move and reset towards the second port 22 until the first seal 34 re-seals the second port 22 of the valve seat 2, thereby isolating the interface 11 and the pressure relief port 12.

[0090] When the container is not used for a long time or an abnormal situation occurs, the pressure can be manually released through handle 6, thereby ensuring the safety of the container during use.

[0091] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0092] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0093] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0094] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A pressure relief assembly applied to a temperature and pressure safety valve, the temperature and pressure safety valve comprising a valve body (1) and a valve seat (2), the valve body (1) having an interface (11) and a pressure relief port (12), the valve seat (2) being disposed within the valve body (1), the valve seat (2) having a first port (21) and a second port (22) disposed opposite to each other, characterized in that, The pressure relief assembly (3) includes: When the valve core (30) is in the first position, the valve core (30) abuts against the second port (22), isolating the second port (22) from the pressure relief port (12). When the valve core (30) moves from the first position away from the valve seat (2) or moves from the direction away from the valve seat (2) towards the first position, the second port (22) communicates with the pressure relief port (12). An elastic element (31) is used to elastically press the valve core (30) to the first position; The valve core (30) is provided with a guide portion (32) on the side facing the second port (22). When the valve core (30) is in the first position, the inner peripheral wall of the guide portion (32) abuts against the outer peripheral wall of the second port (22).

2. The pressure relief assembly according to claim 1, characterized in that, As the valve core (30) moves from a direction away from the valve seat (2) toward the first position, when the guide portion (32) coincides with the valve seat (2) along the axial (X) direction of the valve body (1), the inner peripheral wall of the guide portion (32) slides against the outer peripheral wall of the second port (22) to restrict the pressure relief assembly (3) from moving along the axial (X) direction of the valve body (1).

3. The pressure relief assembly according to claim 2, characterized in that, The valve core (30) includes: A sealing seat (33) includes a first bottom wall (33a) and a first peripheral wall (33b). The first peripheral wall (33b) surrounds the first bottom wall (33a). The first bottom wall (33a) and the first peripheral wall (33b) form a receiving groove. The side of the first peripheral wall (33b) away from the first bottom wall (33a) is configured as a guide portion (32). A first seal (34) is disposed in the receiving groove to selectively abut against the second port.

4. The pressure relief assembly according to claim 3, characterized in that, The valve core (30) also includes: The support base (35) abuts against one end of the elastic member (31); Fastener (36) passes through the first seal (34) and the sealing seat (33) and is connected to the support seat (35).

5. The pressure relief assembly according to claim 1, characterized in that, The valve core (30) also includes a valve stem (37) passing through the elastic member (31), one end of the valve stem (37) being connected to the valve core (30), and the other end of the valve stem (37) extending out of the valve body (1).

6. A temperature and pressure safety valve, characterized in that, include: The pressure relief assembly according to any one of claims 1-5; A temperature sensing component (4) extends into the valve body (1) at one end. The temperature sensing component (4) is adapted to push the valve core (30) to move away from the valve seat (2) when the temperature rises, so as to connect the second port (22) with the pressure relief port (12).

7. The temperature and pressure safety valve according to claim 6, characterized in that, The valve body (1) includes a valve body (13) and a valve cover (14). The valve seat (2) is detachably connected to the valve body (13). The valve body (1) has the interface (11), the pressure relief port (12), and the opening (15). Along the axial direction (X) of the valve body (1), the interface (11) and the opening (15) are arranged opposite to each other, and the valve cover (14) covers the opening (15).

8. The temperature and pressure safety valve according to claim 7, characterized in that, It also includes a diaphragm (38), one end of which is sandwiched between the valve body (13) and the valve cover (14), and the other end of which is fixed to the valve core (30) to separate the pressure relief port (12) from the space where the elastic element (31) is located.

9. The temperature and pressure safety valve according to claim 8, characterized in that, The diaphragm (38) includes a fourth bottom wall (381), a third peripheral wall (382), and a top wall (383). Along the axial direction (X) of the valve body (1), the fourth bottom wall (381) is connected to one end of the third peripheral wall (382) and fixed to the valve core (30). The top wall (383) is connected to the other end of the third peripheral wall (382) and is partially sandwiched between the valve body (13) and the valve cover (14). The top wall (383) is arc-shaped.

10. The temperature and pressure safety valve according to claim 6, characterized in that, The temperature and pressure safety valve also includes a pressure regulating part (5), which is located along the axial direction (X) of the valve body (1). One end of the pressure regulating part (5) is threadedly connected to the valve body (1), and the other end abuts against the end of the elastic element (31) away from the valve core (30).

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