Overload pressure eliminating device

Abstract

The invention discloses an overload pressure eliminating device, and belongs to the technical field of pressure sensors, the overload pressure eliminating device comprises a pressure joint, a limiting part, a sealing valve core, a check ring with a through hole, and an elastic piece, the pressure joint comprises a joint main body, and an opening groove, an accommodating groove, an adjusting groove and a flow guide channel which are arranged on the joint main body and are connected in sequence; the limiting part is arranged on the connector body and located between the containing groove and the adjusting groove. The sealing valve element comprises a valve body and a flow channel arranged on the valve body, the flow channel comprises a transverse channel and a vertical channel communicated with the transverse channel, the transverse channel is communicated with the adjusting groove, the vertical channel is communicated with the open groove, and the valve body sequentially penetrates through the open groove, the containing groove, the limiting part and the adjusting groove and then extends into the flow guide channel; the check ring is detachably connected with the connector body. The elastic piece is arranged on the valve body in a sleeving mode and connected with the valve body and the limiting part. According to the invention, when the measured medium has steady-state or transient overload pressure, the pressure can be blocked in time, and the sensitive element of the sensor can be protected.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure sensors, and in particular relates to an overload pressure elimination device. Background Art

[0002] As an important component in the field of measurement and control, pressure sensors are widely used in various industrial systems to monitor the medium pressure in the channel in real time. In practical applications, the pressure value in the measured system is usually in an unstable state, and adverse working conditions such as short-term pressure alternation and pressure pulses may occur. Adverse working conditions are very likely to produce overload pressure, which will not only affect the measurement accuracy of the pressure sensor, but also may cause irreversible damage to the sensitive components of the pressure sensor. At present, in pressure sensor technology, a built-in damper is usually used to eliminate transient pressure overloads. Although the built-in damper can alleviate the impact of transient overload pressure on the sensor to a certain extent, it is difficult to cope with steady-state overload pressure and cannot effectively eliminate steady-state or transient overload pressure under various complex working conditions to protect the sensor's sensitive components.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is that it is impossible to protect the sensitive components of the sensor when a steady-state or transient overload pressure occurs in the measured medium.

[0005] In order to solve the above technical problems, the present invention provides an overload pressure elimination device, which includes: a pressure joint, a limiting portion, a sealing valve core, a retaining ring with a through hole, and an elastic member. The pressure joint includes a joint body and an opening groove, a containing groove, an adjusting groove and a guide channel arranged in the joint body and connected in sequence; the limiting portion is arranged in the joint body, and the limiting portion is located between the containing groove and the adjusting groove; the sealing valve core includes a valve body and a flow channel arranged in the valve body, and the flow channel includes a transverse channel and a vertical channel connected to the transverse channel. The transverse channel is communicated with the adjusting groove, the vertical channel is communicated with the opening groove, the projection of the guide channel along the longitudinal axis direction of the pressure joint on the valve body is located on the valve body, the valve body sequentially penetrates the opening groove, the accommodating groove, the limiting portion and the adjusting groove and then extends into the guide channel; the retaining ring is detachably connected to the joint body, and the retaining ring is located in the opening groove, and the through hole is opposite to the vertical channel; the elastic member is sleeved on the valve body, the elastic member is respectively connected to the valve body and the limiting portion, and the elastic member is located in the accommodating groove.

[0006] Optionally, the valve body includes a first end and a second end connected to the first end, the first end at least partially extends into the guide channel, the transverse channel and the vertical channel are respectively located in the second end, the second end is located between the retaining ring and the first end, the retaining ring is used to fit with the second end, the elastic member is sleeved on the second end, and the elastic member is respectively connected to the second end and the limiting portion, and the first end and the second end are integrally formed.

[0007] Optionally, the first end has a conical outer circumference, and the outer circumference is symmetrically distributed along the longitudinal axis of the joint body.

[0008] Optionally, an isolation channel is formed between the outer circumferential surface of the first end and the joint body, and the isolation channel is respectively connected to the guide channel and the adjustment groove.

[0009] Optionally, when the outer circumferential surface of the first end contacts the joint body, the isolation channel is closed to isolate the adjustment groove and the guide channel; or when the outer circumferential surface of the first end is separated from the joint body, the isolation channel is opened to allow the measured medium to flow through the opening groove, the vertical channel, the transverse channel, the adjustment groove, the isolation channel and the guide channel in sequence.

[0010] Optionally, the flow rate of the measured medium in the isolation channel is smaller than the flow rate of the measured medium in the transverse channel and the flow rate of the measured medium in the vertical channel.

[0011] Optionally, a boss is provided at the second end, the boss and the limiting portion together form a limiting area for placing the elastic member, and the boss is located between the retaining ring and the elastic member, so that the elastic member is in a compressed state through the boss and the limiting portion.

[0012] Optionally, a projection of the transverse channel in the adjustment groove along a direction perpendicular to the longitudinal axis of the pressure connector is located in the adjustment groove.

[0013] Optionally, the height of the opening groove along the longitudinal axis of the pressure joint is greater than the height of the retaining ring along the longitudinal axis of the pressure joint, and the opening groove is provided with an internal thread, the retaining ring is provided with an external thread, and the retaining ring is threadedly connected to the opening groove.

[0014] Optionally, the transverse channel and the vertical channel are combined to form a T-shaped flow channel, and the vertical channel extends along the longitudinal axis direction of the pressure joint.

[0015] Beneficial effects:

[0016] The present invention provides an overload pressure elimination device, which is provided by sequentially arranging an open groove, a containing groove, an adjusting groove and a guide channel which are interconnected in a joint body of a pressure joint, a limiting part is provided in the joint body, and the limiting part is located between the containing groove and the adjusting groove. A flow channel in a sealing valve core is provided in a valve body, a vertical channel and a transverse channel in the flow channel are interconnected, the transverse channel and the adjusting groove are interconnected, the vertical channel and the open groove are interconnected, a projection of the guide channel on the valve body along the longitudinal axis direction of the pressure joint on the valve body is located on the valve body, and the valve body sequentially penetrates the open groove, the containing groove, the limiting part and the adjusting groove and then extends into the guide channel. A retaining ring is detachably connected to the joint body, and the retaining ring is located inside the open groove, the through hole of the retaining ring is directly opposite to the vertical channel, an elastic member is sleeved on the valve body, the elastic member is respectively connected to the valve body and the limiting part, and the elastic member is located inside the containing groove. In this way, under normal working conditions, due to the elastic force of the elastic member, the sealing valve core is pushed open, so that the diversion channel and the flow channel are interconnected, and the measured medium can flow through the opening groove, the flow channel, the regulating groove and the diversion channel, so that the measured medium can pass smoothly. When the measured medium has a steady-state or transient overload pressure, the flow rate of the measured medium flowing from the regulating groove into the diversion channel will be less than the flow rate of the measured medium flowing through the flow channel of the valve body, resulting in the pressure of the sealing valve core near the opening groove being higher than the pressure of the sealing valve core near the diversion channel. At this time, the pressure difference will act on the sealing valve core, so that the sealing valve core overcomes the elastic force of the elastic member and moves toward the direction close to the diversion channel. After the valve body extends into the diversion channel, it cooperates with the joint body to adjust the flow rate of the measured medium flowing from the regulating groove into the diversion channel, or blocks the measured medium from flowing from the regulating groove into the diversion channel, so as to effectively block the pressure and protect the sensitive components at the rear end. Thereby, when the measured medium has a steady-state or transient overload pressure, the pressure can be blocked in time, which is beneficial to protecting the sensitive components of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic structural diagram of an overload pressure elimination device provided in an embodiment of the present invention.

[0019] Figure 2 A schematic structural diagram of a sealing valve core in an overload pressure elimination device provided in an embodiment of the present invention.

[0020] Figure 3 A schematic structural diagram of an isolation channel in an overload pressure elimination device provided in an embodiment of the present invention.

[0021] Figure 4 A schematic structural diagram of a pressure joint in an overload pressure relief device provided in an embodiment of the present invention.

[0022] The meanings of the symbols in the accompanying drawings are:

[0023] 1—pressure joint, 11—joint body, 12—opening groove, 13—accommodating groove, 14—adjusting groove, 15—guiding channel, 16—longitudinal axis; 2—limiting portion; 3—sealing valve core, 31—valve body, 311—first end, 3111—outer peripheral surface, 3112—isolation channel, 312—second end, 3121—boss, 3122—limiting area, 32—flow channel, 321—transverse channel, 322—vertical channel; 4—retaining ring, 41—through hole; 5—elastic member. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0025] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0026] In the embodiments of the present application, at least one refers to one or more; multiple refers to two or more. In the description of the present application, the words "first", "second", "third", etc. are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0027] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, in this specification, the terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. It should be noted that in the embodiments of the present application, "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0028] It should be pointed out that in the embodiments of the present invention, when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. At the same time, "connection" in the embodiments of the present application can also be understood as electrical connection, and the connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, A is connected to B, which can be either a direct connection between A and B or an indirect connection between A and B through one or more other electrical components. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the present invention.

[0029] An overload pressure elimination device provided by an embodiment of the present invention is provided in Figures 1 to 4 As shown, Figure 1 is a schematic structural diagram of an overload pressure elimination device provided by an embodiment of the present invention, Figure 2 1 is a structural schematic diagram of a sealing valve core 3 in an overload pressure elimination device provided in an embodiment of the present invention. Figure 3 It is a structural schematic diagram of an isolation channel 3112 in an overload pressure elimination device provided in an embodiment of the present invention. Figure 41 is a schematic diagram of the structure of a pressure joint 1 in an overload pressure elimination device provided in an embodiment of the present invention. An overload pressure elimination device provided in an embodiment of the present invention comprises a pressure joint 1, a limiting portion 2, a sealing valve core 3, a retaining ring 4 and an elastic member 5. The pressure joint 1 comprises a joint body 11 and an opening groove 12, a receiving groove 13, an adjusting groove 14 and a guide channel 15 arranged in the joint body 11, and the opening groove 12, the receiving groove 13, the adjusting groove 14 and the guide channel 15 are connected in sequence. The limiting portion 2 is arranged in the joint body 11, and the limiting portion 2 is located between the receiving groove 13 and the adjusting groove 14. The sealing valve core 3 includes a valve body 31 and a flow channel 32. The flow channel 32 is arranged on the valve body 31. The flow channel 32 includes a transverse channel 321 and a vertical channel 322. The vertical channel 322 is connected to the transverse channel 321. At the same time, the transverse channel 321 is connected to the adjustment groove 14. The vertical channel 322 is connected to the opening groove 12. The projection of the guide channel 15 along the longitudinal axis 16 of the pressure joint 1 on the valve body 31 is located on the valve body 31. After the valve body 31 passes through the opening groove 12, the accommodating groove 13, the limiting portion 2 and the adjusting groove 14 in sequence, the valve body 31 can extend into the guide channel 15. The retaining ring 4 has a through hole 41. The retaining ring 4 is detachably connected to the joint body 11, and the retaining ring 4 is located inside the opening groove 12. The through hole 41 is opposite to the vertical channel 322. The elastic member 5 is sleeved on the valve body 31. The elastic member 5 is respectively connected to the valve body 31 and the limiting portion 2, and the elastic member 5 is located inside the accommodating groove 13.

[0030] The interior of the accommodating groove 13 has a space for accommodating the elastic member 5, the elastic member 5 includes a spring, the elastic member 5 is sleeved on the outside of the valve body 31, one end of the elastic member 5 is in contact with the limiting portion 2, and the other end of the elastic member 5 is connected to the valve body 31, that is, the valve body 31 is elastically connected to the limiting portion 2 through the elastic member 5. The measured medium can flow through the opening groove 12, the flow channel 32, the regulating groove 14 and the guide channel 15 in sequence, the transverse channel 321 and the vertical channel 322 are interconnected to form the flow channel 32, the flow channel 32 is located inside the valve body 31, and the opening of the transverse channel 321 is interconnected with the regulating groove 14. Since the projection of the guide channel 15 along the longitudinal axis 16 of the pressure joint 1 on the valve body 31 is located on the valve body 31, when the valve body 31 gradually extends into the guide channel 15, the valve body 31 and the joint body 11 approach each other, thereby adjusting the flow rate of the measured medium entering the guide channel 15, or the valve body 31 and the joint body 11 are in close contact with each other to block the measured medium from entering the guide channel 15.

[0031] The limiting part 2 may be an annular structure, and the limiting part 2 is sleeved outside the valve body 31. When the valve body 31 moves in the limiting part 2, the surfaces of the limiting part 2 and the valve body 31 are in close contact with each other, so that the measured medium flows from the flow channel 32 into the regulating groove 14, and the measured medium is prevented from flowing through the gap between the limiting part 2 and the valve body 31. The connection between the transverse channel 321 and the vertical channel 322 may adopt a rounded transition to reduce eddy currents and impacts when the measured medium flows.

[0032] In this embodiment, the opening groove 12, the containing groove 13, the adjusting groove 14 and the guide channel 15 are sequentially arranged in the joint body 11 of the pressure joint 1, and the limiter 2 is arranged in the joint body 11, and the limiter 2 is located between the containing groove 13 and the adjusting groove 14. The flow channel 32 in the sealing valve core 3 is arranged inside the valve body 31, the vertical channel 322 and the transverse channel 321 in the flow channel 32 are interconnected, the transverse channel 321 and the adjusting groove 14 are interconnected, and the vertical channel 322 and the opening groove 12 are interconnected. The projection of the guide channel 15 on the valve body 31 along the longitudinal axis 16 of the pressure joint 1 is located on the valve body 31, and the valve body 31 sequentially penetrates the opening groove 12, the containing groove 13, the limiter 2 and the adjusting groove 14 and then extends into the inside of the guide channel 15. The retaining ring 4 and the joint body 11 are detachably connected to each other, and the retaining ring 4 is located inside the opening groove 12, and the through hole 41 of the retaining ring 4 is opposite to the vertical channel 322. The elastic member 5 is sleeved on the valve body 31, and the elastic member 5 is respectively connected to the valve body 31 and the limit portion 2, and the elastic member 5 is located inside the accommodating groove 13. In this way, under normal working conditions, due to the elastic force of the elastic member 5, the sealing valve core 3 is pushed open, so that the guide channel 15 and the flow channel 32 are connected to each other, and the measured medium can flow through the opening groove 12, the flow channel 32, the adjustment groove 14 and the guide channel 15, so that the measured medium can pass smoothly. When the measured medium has a steady-state or transient overload pressure, the flow rate of the measured medium flowing from the regulating groove 14 into the diversion channel 15 will be less than the flow rate of the measured medium flowing through the flow channel 32 of the valve body 31, resulting in the pressure of the sealing valve core 3 near the opening groove 12 being higher than the pressure of the sealing valve core 3 near the diversion channel 15. At this time, the pressure difference will act on the sealing valve core 3, so that the sealing valve core 3 overcomes the elastic force of the elastic member 5 and moves toward the diversion channel 15. After the valve body 31 extends into the diversion channel 15, it cooperates with the joint body 11 to adjust the flow rate of the measured medium flowing from the regulating groove 14 into the diversion channel 15, or prevents the measured medium from flowing from the regulating groove 14 into the diversion channel 15, so as to effectively block the pressure and protect the sensitive components at the rear end. Thereby, when the measured medium has a steady-state or transient overload pressure, the pressure can be blocked in time, which is beneficial to protecting the sensitive components of the sensor.

[0033] As an embodiment, the valve body 31 includes a first end 311 and a second end 312, the first end 311 and the second end 312 are connected to each other, the first end 311 and the second end 312 can be integrally formed, and the first end 311 at least partially extends into the interior of the guide channel 15, and is used to cooperate with the joint body 11 to block pressure when overloaded. The transverse channel 321 and the vertical channel 322 are respectively located inside the second end 312, the second end 312 is located between the retaining ring 4 and the first end 311, the retaining ring 4 is used to fit with the second end 312, the elastic member 5 is sleeved on the second end 312, and the elastic member 5 is respectively connected to the second end 312 and the limit portion 2 to provide elastic support for the valve body 31. Under normal working conditions, the elastic force of the elastic member 5 can keep a certain distance between the first end 311 and the guide channel 15, that is, to ensure that the measured medium can pass smoothly. When overload pressure occurs, the first end 311 will move toward the guide channel 15 under the action of the pressure difference until the first end 311 and the joint body 11 contact each other. At this time, the isolation channel 3112 formed between the outer peripheral surface 3111 of the first end 311 and the joint body 11 is in a closed state, which can effectively block the medium flowing from the regulating groove 14 into the guide channel 15, thereby protecting the sensitive components at the rear end.

[0034] In some embodiments, the outer circumferential surface 3111 of the first end 311 is a conical surface, and the outer circumferential surface 3111 is symmetrically distributed along the longitudinal axis 16 of the joint body 11. The first end 311 with a conical surface shape can more smoothly and closely contact with the joint body 11 during movement, thereby reducing friction and wear, that is, under overload pressure, the conical surface can fit with the joint body 11 more quickly to achieve rapid isolation.

[0035] In some embodiments, the outer peripheral surface 3111 of the first end 311 and the joint body 11 enclose an isolation channel 3112, and the isolation channel 3112 is respectively connected to the guide channel 15 and the adjustment groove 14, so that the measured medium located in the adjustment groove 14 enters the guide channel 15 from the isolation channel 3112. The isolation channel 3112 is in an open state under normal working conditions, allowing the medium to flow smoothly. Under the action of overload pressure, when the first end 311 and the joint body 11 are in contact with each other, the isolation channel 3112 is in a closed state, which can timely cut off the medium passage from the adjustment groove 14 to the guide channel 15.

[0036] In some embodiments, when the outer circumference 3111 of the first end 311 contacts the joint body 11, the isolation channel 3112 is closed, so that the adjustment groove 14 and the guide channel 15 are isolated from each other. Or when the outer circumference 3111 of the first end 311 is separated from the joint body 11, the isolation channel 3112 is opened, so that the measured medium flows through the opening groove 12, the vertical channel 322, the transverse channel 321, the adjustment groove 14, the isolation channel 3112 and the guide channel 15 in sequence. By controlling the opening and closing states of the isolation channel 3112, the flow path of the medium can be controlled more accurately, ensuring that the pressure is blocked in time under overload conditions, while maintaining smooth flow of the medium under normal working conditions.

[0037] In some embodiments, the flow rate of the measured medium located inside the isolation channel 3112 is smaller than the flow rate of the measured medium located in the transverse channel 321, and the flow rate of the measured medium located inside the isolation channel 3112 is smaller than the flow rate of the measured medium located in the vertical channel 322, so that the pressure of the sealing valve core 3 near the opening groove 12 can be higher than the pressure of the sealing valve core 3 near the guide channel 15. At this time, the pressure difference generated will act on the sealing valve core 3, so that the sealing valve core 3 will move toward the direction close to the guide channel 15. After the valve body 31 and the joint body 11 cooperate with each other, they will adjust the flow rate of the measured medium flowing from the adjusting groove 14 into the guide channel 15, or block the measured medium from flowing from the adjusting groove 14 into the guide channel 15, which can effectively block the pressure and reduce the impact on the rear-end sensitive elements.

[0038] As an implementation mode, a boss 3121 is provided on the second end 312, and the boss 3121 and the limiting portion 2 are enclosed to form a limiting area 3122, and the space inside the limiting area 3122 is specifically a space for placing the elastic member 5, and the boss 3121 is located between the retaining ring 4 and the elastic member 5, and the elastic member 5 can be in a compressed state through the boss 3121 and the limiting portion 2. The cooperation between the boss 3121 and the limiting portion 2 enables the elastic member 5 to maintain a compressed state, providing stable elastic force support for the valve body 31.

[0039] In some embodiments, the projection of the transverse channel 321 inside the adjusting groove 14 along the direction perpendicular to the longitudinal axis 16 of the pressure joint 1 is located inside the adjusting groove 14. Under normal working conditions, the measured medium enters the vertical channel 322 through the opening groove 12, then flows into the adjusting groove 14 through the transverse channel 321, and finally flows out through the guide channel 15. When overload pressure occurs, since the transverse channel 321 is stably located inside the adjusting groove 14, it can ensure that the adjusting groove 14 and the transverse channel 321 are connected in real time, and the medium in the transverse channel 321 will enter the adjusting groove 14 faster.

[0040] In some embodiments, the height of the open groove 12 along the longitudinal axis 16 of the pressure joint 1 is greater than the height of the retaining ring 4 along the longitudinal axis 16 of the pressure joint 1, and an internal thread is provided inside the open groove 12, and an external thread matching the internal thread is provided on the retaining ring 4, and the internal thread and the external thread match each other, so that the retaining ring 4 is threadedly connected inside the open groove 12. By threading the retaining ring 4 inside the open groove 12, the position of the retaining ring 4 can be adjusted to adapt to the elimination of different overload pressures, and the retaining ring 4 is easy to replace and maintain.

[0041] As an implementation method, the flow channel 32 formed by the transverse channel 321 and the vertical channel 322 is T-shaped, and the vertical channel 322 extends along the longitudinal axis 16 of the pressure joint 1. Under normal working conditions, the measured medium flows smoothly into the regulating groove 14 along the T-shaped flow channel 32 structure through the opening groove 12, and finally flows out through the guide channel 15. When overload pressure occurs, since the T-shaped flow channel 32 can make the measured medium flow through the interior of the valve body 31 in a shorter path, it is beneficial to improve the accuracy and reliability of overload pressure protection.

[0042] Under normal working conditions, due to the elastic force of the elastic member 5, the sealing valve core 3 is pushed open, so that the guide channel 15 and the T-shaped flow channel 32 are interconnected, and the measured medium can flow through the opening groove 12, the T-shaped flow channel 32, the adjustment groove 14 and the guide channel 15, so that the measured medium can pass smoothly. When the measured medium has a steady-state or transient overload pressure, the flow rate of the measured medium flowing from the regulating groove 14 into the guide channel 15 will be less than the flow rate of the measured medium flowing through the T-shaped flow channel 32 of the valve body 31, resulting in the pressure of the sealing valve core 3 near the opening groove 12 being higher than the pressure of the sealing valve core 3 near the guide channel 15. At this time, the pressure difference will act on the sealing valve core 3, so that the sealing valve core 3 overcomes the elastic force of the elastic member 5 and moves toward the direction close to the guide channel 15. After the valve body 31 extends into the guide channel 15, it cooperates with the joint body 11 to adjust the flow rate of the measured medium flowing from the regulating groove 14 into the guide channel 15, or block the measured medium from flowing from the regulating groove 14 into the guide channel 15, which is beneficial to protect the rear end sensitive element of the T-shaped flow channel 32.

[0043] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An overload pressure relief device, characterized in that: The overload pressure elimination device comprises: a pressure joint, a limiting part, a sealing valve core, a retaining ring with a through hole, and an elastic member. The pressure joint comprises a joint body and an opening groove, a containing groove, an adjusting groove, and a flow guide channel which are arranged in the joint body and are connected in sequence; the limiting part is arranged in the joint body, and the limiting part is located between the containing groove and the adjusting groove; the sealing valve core comprises a valve body and a flow channel arranged in the valve body, and the flow channel comprises a transverse channel and a vertical channel connected to the transverse channel, and the transverse channel is connected to the adjusting groove. The vertical channel is connected to the opening groove, the projection of the guide channel along the longitudinal axis direction of the pressure joint on the valve body is located on the valve body, and the valve body sequentially penetrates the opening groove, the accommodating groove, the limiting portion and the adjusting groove and then extends into the guide channel; the retaining ring is detachably connected to the joint body, and the retaining ring is located in the opening groove, and the through hole is opposite to the vertical channel; the elastic member is sleeved on the valve body, and the elastic member is respectively connected to the valve body and the limiting portion, and the elastic member is located in the accommodating groove.

2. The overload pressure relief device according to claim 1, characterized in that: The valve body includes a first end and a second end connected to the first end, the first end at least partially extends into the guide channel, the transverse channel and the vertical channel are respectively located in the second end, the second end is located between the retaining ring and the first end, the retaining ring is used to fit with the second end, the elastic member is sleeved on the second end, and the elastic member is respectively connected to the second end and the limiting portion, and the first end and the second end are integrally formed.

3. The overload pressure relief device according to claim 2, characterized in that: The first end has a conical outer circumference, and the outer circumference is symmetrically distributed along the longitudinal axis of the joint body.

4. The overload pressure relief device according to claim 3, characterized in that: An isolation channel is formed between the outer peripheral surface of the first end and the joint body, and the isolation channel is respectively connected to the guide channel and the adjustment groove.

5. The overload pressure relief device according to claim 4, characterized in that: When the outer circumferential surface of the first end contacts the joint body, the isolation channel is closed to isolate the adjustment groove and the guide channel; or when the outer circumferential surface of the first end is separated from the joint body, the isolation channel is opened to allow the measured medium to flow through the opening groove, the vertical channel, the transverse channel, the adjustment groove, the isolation channel and the guide channel in sequence.

6. The overload pressure relief device according to claim 4, characterized in that: The flow rate of the measured medium in the isolation channel is respectively smaller than the flow rate of the measured medium in the transverse channel and the flow rate of the measured medium in the vertical channel.

7. The overload pressure relief device according to claim 2, characterized in that: A boss is provided at the second end, and the boss and the limiting portion together form a limiting area for placing the elastic member. The boss is located between the retaining ring and the elastic member, so that the elastic member is in a compressed state through the boss and the limiting portion.

8. The overload pressure relief device according to claim 1, characterized in that: The projection of the transverse channel in the adjustment groove in a direction perpendicular to the longitudinal axis of the pressure connector is located in the adjustment groove.

9. The overload pressure relief device according to claim 1, characterized in that: The height of the opening groove along the longitudinal axis of the pressure joint is greater than the height of the retaining ring along the longitudinal axis of the pressure joint, and the opening groove is provided with an internal thread, the retaining ring is provided with an external thread, and the retaining ring is threadedly connected to the opening groove.

10. The overload pressure relief device according to claim 1, characterized in that: The transverse channel and the vertical channel are combined to form a T-shaped flow channel, and the vertical channel extends along the longitudinal axis direction of the pressure joint.

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