Oil way switching part for pressure relief valve

Abstract

The utility model discloses an oil way switching part for a pressure relief valve, which comprises a flow guide column and a flow limiting part, and the flow limiting part is positioned at the tail part of the flow guide column; the head part of the flow guide column is sunken towards the tail part of the flow guide column to form a triangular spire, the flow guide column is provided with flow guide grooves, and each flow guide groove extends to the tail part of the flow guide column from the head part of the flow guide column; a first groove is formed in the end, close to the triangular spire, of any flow guide groove, and the multiple first grooves are distributed in the side wall of the flow guide column. According to the pressure relief valve, the first groove is formed and used for containing the liquid flowing through the oil way switching part, so that the liquid flows to the surface of the oil way switching part under stress, the friction coefficient between the oil way switching part and the inner wall of the pressure relief valve is reduced, and the friction force on the surface of the oil way switching part is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief valve technology, and in particular to an oil circuit switching component for a pressure relief valve. Background Technology

[0002] Traditional pressure relief valves are equipped with oil circuit switching components. These components switch the oil circuits to allow the internal air pressure to flow out of the pressure relief valve through different oil circuits for pressure relief.

[0003] The current pressure relief valve has a defect: the oil circuit switching parts inside the pressure relief valve are too tightly pressed against the inner wall of the pressure relief valve, resulting in insufficient pressure in the valve body to push the oil circuit switching parts away, thus failing to achieve the pressure relief function. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art. This utility model provides an oil circuit switching part for a pressure relief valve. By setting a first groove, the first groove accommodates the liquid flowing through the oil circuit switching part, so that the liquid is forced to flow to the surface of the oil circuit switching part. This helps to reduce the friction coefficient between the oil circuit switching part and the inner wall of the pressure relief valve, so that the oil circuit switching part can move easily and realize the pressure relief function.

[0005] Accordingly, this utility model proposes an oil circuit switching component for a pressure relief valve, the oil circuit switching component comprising: a flow guide column and a flow limiting part, the flow limiting part being located at the tail end of the flow guide column;

[0006] The head of the guide column is recessed towards the tail of the guide column to form a triangular apex, and the guide column has a guide groove, each of the guide grooves extending from the head of the guide column to the tail of the guide column.

[0007] Each of the flow guide grooves has a first groove at one end near the apex of the triangle, and multiple first grooves are distributed on the sidewall of the flow guide column.

[0008] Preferably, the flow guide column and the flow limiting part are integrally formed.

[0009] Preferably, the first groove is connected to the guide groove on the same plane.

[0010] Preferably, the distance between two adjacent first grooves located on the same guide column sidewall is equal.

[0011] Preferably, the flow-limiting part includes: an outer enclosure and a frustum;

[0012] The frustum is located within the outer enclosure, and a gap is formed between the outer enclosure and the frustum.

[0013] Preferably, the head of the outer enclosure is connected to the frustum, and the outer enclosure extends outward from its head in a direction away from the frustum to form an inclined surface.

[0014] Preferably, the end of the inclined surface is provided with a plurality of storage grooves, and the plurality of storage grooves are arrayed on the inclined surface.

[0015] Preferably, the edge of the frustum extends outward to form a boss, and the boss is distributed on the side wall of the frustum with the center of the frustum as a reference.

[0016] Preferably, the outer enclosure is driven by an external force to move closer to the boss or the outer enclosure is driven by an external force to sway away from the boss.

[0017] Preferably, the oil circuit switching component is made of rubber.

[0018] The beneficial effects of this utility model are:

[0019] This invention features a guide column with a triangular tip formed by the head of the guide column being recessed towards the tail. This triangular tip reduces the impact force of the liquid flowing towards the oil circuit switching component, thus extending its service life. The invention also includes a first groove that accommodates the liquid flowing through the oil circuit switching component, causing the liquid to flow under pressure to the surface of the component. This reduces the coefficient of friction between the oil circuit switching component and the inner wall of the pressure relief valve, lowering the friction on the surface of the oil circuit switching component and allowing it to move easily, thus achieving the pressure relief function. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the oil circuit switching component in this utility model;

[0022] Figure 2 This is a front view of the oil circuit switching component in this utility model;

[0023] Figure 3 This is a cross-sectional view of the oil circuit switching component in this utility model.

[0024] In the attached diagram, 1 is the flow guide column; 11 is the triangular apex; 12 is the flow guide groove; 13 is the first groove; 2 is the flow limiting part; 21 is the outer enclosure; 211 is the storage groove; 22 is the frustum; and 221 is the boss. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Figure 1 A schematic diagram of the oil circuit switching component in this invention is shown. Figure 2 The front view of the oil circuit switching component in this utility model is shown. Figure 3 A cross-sectional view of the oil circuit switching component of this utility model is shown. The oil circuit switching component includes: a flow guide column 1 and a flow restrictor 2, the flow restrictor 2 being located at the tail of the flow guide column 1; the head of the flow guide column 1 is recessed towards the tail to form a triangular apex 11, the flow guide column 1 has a flow guide groove 12, each of the flow guide grooves 12 extending from the head to the tail of the flow guide column 1; a first groove 13 is provided at one end of each flow guide groove 12 near the triangular apex 11, and multiple first grooves 13 are distributed on the sidewall of the flow guide column 1. The triangular apex 11 is used to reduce the impact force of liquid flowing towards the oil circuit switching component, and allows the liquid to flow along the inclined surface of the triangular apex 11 into the flow guide groove 12. The flow guide groove 12 is used to guide the liquid flow direction, allowing the liquid to flow to a predetermined location. The first groove 13 is used to divert the flow of the flow guide groove 12 and reduce the surface friction of the oil circuit switching component.

[0027] Furthermore, the flow guide column 1 and the flow limiting part 2 are integrally molded, which enables the production of a more complete, robust, and reliable product. Because the material is subjected to uniform pressure and temperature control during the molding process, defects and flaws caused by secondary processing and gluing are avoided, which helps improve the overall stability and reliability of the oil circuit switching parts. Secondly, the integral molding design of the flow guide column 1 and the flow limiting part 2 ensures that all parts of the product are tightly integrated, reducing the failure rate caused by loosening or damage to the flow guide column 1 or the limiting part, thus improving the overall stability and reliability of the oil circuit switching parts.

[0028] Furthermore, the first groove 13 is connected to the flow guide 12 on the same plane, but the depth of the first groove 13 is different from the depth of the flow guide 12. The depth of the first groove 13 is less than the depth of the flow guide 12. The first groove 13 is used to divert the flow from the flow guide 12, allowing some liquid to flow out from the first groove 13. When liquid flows into the triangular tip 11, the liquid flows into the flow guide 12, and some liquid flows into the first groove 13. After the liquid flows to the first groove 13, it exerts a force on the first groove 13. At the same time, the liquid flowing to the end of the flow guide 12 also exerts a force on the flow limiting part 2, which helps the oil circuit switching part to move to the corresponding position more quickly after being subjected to force.

[0029] It should be noted that when no more liquid is added to the oil circuit switching component, some liquid will remain in the first groove 13. Then, the oil circuit switching component is reset by air pressure. When the oil circuit switching component returns to its original position, it will be squeezed by the inner wall of the pressure relief valve. After being squeezed, the oil circuit switching component will deform slightly, and the remaining liquid will flow out from the first groove 13. The remaining liquid will then flow to the surface of the oil circuit switching component, which helps to reduce the coefficient of friction between the oil circuit switching component and the inner wall of the pressure relief valve, reduce the friction on the surface of the oil circuit switching component, and make the oil circuit switching component return to its initial position more quickly after being subjected to force.

[0030] Furthermore, the distance between two adjacent first grooves 13 located on the same sidewall of the guide column 1 is equal. When the distance between multiple first grooves 13 is equal, the pressure distribution on the guide column 1 from the inner wall of the pressure relief valve is more uniform, reducing local stress concentration and thus extending the service life of the contact surface. Secondly, the contact surface between the guide column 1 and the inner wall of the pressure relief valve generates heat during friction. The uniformly distributed first grooves 13 can provide additional heat dissipation channels, helping to reduce the temperature of the contact surface and thus extending its service life.

[0031] Furthermore, the flow-limiting part 2 includes an outer enclosure 21 and a frustum 22; the frustum 22 is located inside the outer enclosure 21, and a gap is formed between the outer enclosure 21 and the frustum 22. The outer enclosure 21 is used to restrict the outflow of liquid, and the frustum 22 is used to block one of the oil passages in the pressure relief valve. The gap between the outer enclosure 21 and the frustum 22 is used to increase the force-bearing area of ​​the flow-limiting part 2. When liquid is no longer supplied to the oil passage switching component, the air pressure exerts a force on the flow-limiting part 2, pushing the entire switching oil passage component back to its initial position. The air pressure fills the gap between the outer enclosure 21 and the frustum 22, increasing the force-bearing area of ​​the flow-limiting part 2, effectively reducing the pressure on the outer enclosure 21, reducing the movement speed of the oil passage switching component in the pressure relief valve, preventing the oil passage switching component from rubbing against the inner wall of the pressure relief valve, and extending the service life of the oil passage switching component.

[0032] Furthermore, the head of the outer enclosure 21 is connected to the frustum 22, and the outer enclosure 21 extends outward from its head in a direction away from the frustum 22 to form a slope. The slope increases the contact area between the oil circuit switching component and the inner wall of the pressure relief valve, ensuring that the oil circuit switching component remains in contact, thereby providing a better sealing effect.

[0033] Furthermore, the end of the inclined surface is provided with a plurality of storage grooves 211, which are arrayed on the inclined surface. In this embodiment, the end of the inclined surface is provided with eight storage grooves 211, which are arrayed on the inclined surface, and the distance between two adjacent storage grooves 211 is equal. The storage grooves 211 are used to store a portion of the liquid. When liquid is no longer supplied to the oil circuit switching component, the oil circuit switching component is reset by air pressure. The inclined surface contacts the inner wall of the pressure relief valve, and the inner wall of the pressure relief valve squeezes the inclined surface. The storage grooves 211 deform, causing the liquid in the storage grooves 211 to flow out to the contact point between the inner wall of the pressure relief valve and the inclined surface. This reduces the coefficient of friction between the oil circuit switching component and the inner wall of the pressure relief valve, reduces the friction on the surface of the oil circuit switching component, and allows the oil circuit switching component to return to its initial position more quickly after being subjected to force.

[0034] Furthermore, the outer enclosure 21 is driven by an external force to move closer to the frustum 22 or to deflect away from the frustum 22. When liquid flows into the pressure relief valve, the liquid flows to the outer enclosure 21, exerting a force on it. This force acts on the inclined surface of the outer enclosure 21, causing it to move closer to the frustum 22, increasing the gap between the outer enclosure 21 and the inner wall of the pressure relief valve. This increases the liquid flow space and accelerates the liquid flow rate. When the liquid stops flowing into the pressure relief valve, the outer enclosure 21 is driven by air pressure to deflect away from the boss 221, i.e., it deflects towards the inner wall of the pressure relief valve, making the outer enclosure 21 tightly adhere to the inner wall of the pressure relief valve, thereby providing a better sealing effect.

[0035] Furthermore, the edge of the frustum 22 extends outward to form a boss 221, which is distributed on the sidewall of the frustum 22 with the center of the frustum 22 as a reference. The boss 221 is used to limit the angle at which the outer enclosure 21 swings towards the frustum 22. When the outer enclosure 21 swings towards the frustum 22, the boss 221 abuts against the inner wall of the outer enclosure 21 and exerts a force on the inner wall of the outer enclosure 21, reducing the swing angle of the outer enclosure 21 and preventing the outer enclosure 21 from swinging parallel to the frustum 22, which would cause wear at the connection between the outer enclosure 21 and the frustum 22, thus helping to extend the service life of the oil circuit switching parts.

[0036] It should be noted that the oil circuit switching component is made of rubber. Rubber has excellent elasticity and resilience, capable of withstanding large deformations and quickly returning to its original shape after the external force is removed. Furthermore, rubber has good wear resistance, is not easily worn over long-term use, and can maintain the integrity and functionality of the product. The rubber material also has excellent waterproof and airtight properties, effectively preventing the penetration of moisture and gas. That is, when the oil circuit switching component divides the depressurization valve into two chambers, the pressure difference between the two sides of the oil circuit switching component remains constant during the process of resetting under air pressure, which facilitates the rapid resetting of the oil circuit switching component.

[0037] In summary, this invention, by setting a guide column with its head recessed towards its tail to form a triangular apex, reduces the impact force of the liquid flowing towards the oil circuit switching component, thus extending its service life. Furthermore, this invention includes a first groove that accommodates the liquid flowing through the oil circuit switching component, causing the liquid to flow under pressure to the surface of the component. This reduces the coefficient of friction between the oil circuit switching component and the inner wall of the pressure relief valve, lowering the surface friction of the oil circuit switching component and allowing it to move easily, thus achieving the pressure relief function.

[0038] Furthermore, the above description provides a detailed explanation of an oil circuit switching component for a pressure relief valve provided in the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A hydraulic circuit switching component for a pressure relief valve, characterized in that, The oil circuit switching component includes: a flow guide column and a flow restrictor, wherein the flow restrictor is located at the tail end of the flow guide column; The head of the guide column is recessed towards the tail of the guide column to form a triangular apex, and the guide column has a guide groove, each of the guide grooves extending from the head of the guide column to the tail of the guide column. Each of the flow guide grooves has a first groove at one end near the apex of the triangle, and multiple first grooves are distributed on the sidewall of the flow guide column.

2. The oil circuit switching component for a pressure relief valve according to claim 1, characterized in that, The flow guide column and the flow limiting part are integrally formed.

3. The oil circuit switching component for a pressure relief valve according to claim 1, characterized in that, The first groove is connected to the flow guide groove on the same plane.

4. The oil circuit switching component for a pressure relief valve according to claim 1, characterized in that, The distance between two adjacent first grooves located on the same sidewall of the guide column is equal.

5. The oil circuit switching component for a pressure relief valve according to claim 1, characterized in that, The flow-limiting part includes: an outer enclosure and a frustum; The frustum is located within the outer enclosure, and a gap is formed between the outer enclosure and the frustum.

6. The oil circuit switching component for a pressure relief valve according to claim 5, characterized in that, The head of the outer enclosure is connected to the frustum, and the outer enclosure extends outward from its head in a direction away from the frustum to form a slope.

7. The oil circuit switching component for a pressure relief valve according to claim 6, characterized in that, The inclined surface is provided with a plurality of storage grooves at its end, and the plurality of storage grooves are arrayed on the inclined surface.

8. The oil circuit switching component for a pressure relief valve according to claim 5, characterized in that, The edge of the frustum extends outward to form a boss, which is distributed on the side wall of the frustum with the center of the frustum as a reference.

9. The oil circuit switching component for a pressure relief valve according to claim 8, characterized in that, The outer enclosure is driven by an external force to move closer to the protrusion or to sway away from the protrusion.

10. The oil circuit switching component for a pressure relief valve according to claim 1, characterized in that, The oil circuit switching parts are made of rubber.

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