Anti-break high pressure system joint

Abstract

The utility model discloses a kind of anti-break high pressure system joints, it is related to hydraulic transmission technical field, including joint body, oil pipe connecting end and equipment butt joint end, the side of joint body is equipped with oil pipe connecting end, the other side of joint body is equipped with equipment butt joint end, the inside of oil pipe connecting end is equipped with guide section, sealing section and limiting section, the surface of equipment butt joint end is equipped with external thread, the surface of joint body is equipped with annular pressure relief groove, the surface of joint body inside annular pressure relief groove is equipped with multiple pressure relief holes, the other end of multiple pressure relief holes is communicated with annular pressure relief groove inside, the inside of annular pressure relief groove is equipped with elastic pressure relief membrane.The utility model is combined design by annular pressure relief groove and multiple pressure relief holes, high pressure shunt release in joint body inner cavity, cooperate the buffering effect of elastic pressure relief membrane, thoroughly improve the defect that the stress of existing joint is concentrated in connecting end part, significantly improve the anti-break ability.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic transmission technology, specifically to a rupture-resistant high-pressure system connector. Background Technology

[0002] Hydraulic pipe fittings are key components in hydraulic systems that connect oil pipes and hydraulic components. Their performance directly affects the reliability and safety of the hydraulic system. In high-pressure hydraulic systems, pipe fittings need to withstand enormous internal pressure and also need to cope with system vibration, medium temperature changes, and other working conditions. They are prone to problems such as local rupture caused by pressure concentration, leakage caused by seal failure, and damage to the fitting body or oil pipe connection caused by vibration fatigue.

[0003] Existing high-pressure hydraulic pipe fittings mostly adopt compression fitting, welding, or flared structures. They mainly improve reliability by enhancing the strength of the fitting body material and optimizing the sealing structure. However, under high pressure, the internal stress of the fitting body is concentrated at the connection end between the oil pipe and the fitting, which can easily lead to local rupture. Furthermore, single sealing structures or simple combination seals are prone to aging and failure under high pressure and vibration conditions, causing leakage. At the same time, there is a lack of effective buffer structure, and system vibration is directly transmitted to the connection between the fitting and the oil pipe. Long-term use can easily lead to fatigue cracks and eventually rupture. Therefore, we propose a rupture-proof high-pressure system fitting. Utility Model Content

[0004] In view of the problems existing in the above-mentioned anti-rupture high-pressure system connectors, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a rupture-resistant high-pressure system connector, which solves the problem that existing high-pressure hydraulic pipe connectors mostly adopt compression fitting, welding, or flared structures. They mainly improve reliability by enhancing the strength of the connector body material and optimizing the sealing structure. However, under high pressure, the internal stress of the connector body is concentrated at the connection end between the oil pipe and the connector, which can easily lead to local rupture. Furthermore, single sealing structures or simple combination seals are prone to aging and failure under high pressure and vibration conditions, causing leakage. At the same time, there is a lack of effective buffer structure, and system vibration is directly transmitted to the connection between the connector and the oil pipe. Long-term use can easily produce fatigue cracks, eventually leading to rupture.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A rupture-resistant high-pressure system connector includes a connector body, an oil pipe connection end, and an equipment docking end. The oil pipe connection end is located on one side of the connector body, and the equipment docking end is located on the other side of the connector body. The oil pipe connection end has a guide section, a sealing section, and a limiting section inside. The surface of the equipment docking end has external threads. The surface of the connector body has an annular pressure relief groove. Multiple pressure relief holes are penetrating through the surface of the connector body located inside the annular pressure relief groove. The other ends of the multiple pressure relief holes are connected to the interior of the annular pressure relief groove. An elastic pressure relief membrane is provided inside the annular pressure relief groove.

[0008] Preferably, the sealing section is provided with a V-shaped elastic sealing ring and a metal sealing gasket inside. The V-shaped elastic sealing ring is a fluororubber ring, and one side of the metal sealing gasket is provided with an arc-shaped groove.

[0009] Preferably, a limiting block is fixedly installed inside the limiting segment, and an arc-shaped protrusion is provided on one side of the limiting block, the arc-shaped protrusion being tightly fitted inside the arc-shaped groove.

[0010] Preferably, an elastic buffer sleeve is fixedly installed on the surface of the oil pipe connection end, and an annular retaining edge is fixedly installed on one side of the elastic buffer sleeve, with one side of the annular retaining edge tightly fitting against one side of the connector body.

[0011] Preferably, the connector body has a nitrided layer inside.

[0012] Preferably, the guide section has a tapered flared structure.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] 1. This utility model, through the combined design of annular pressure relief groove and multiple sets of pressure relief holes, diverts and releases high pressure in the internal cavity of the joint body. Combined with the buffering effect of the elastic pressure relief membrane, it completely improves the defect of stress concentration at the connection end of the existing joint and significantly enhances the anti-rupture ability. At the same time, it adopts a dual structure of V-shaped elastic sealing ring and metal sealing gasket, which utilizes the self-tightening characteristics of the V-shaped ring to adapt to high pressure conditions, and makes up for the aging shortcomings of the elastic seal through metal wire contact sealing, effectively solving the leakage problem under high pressure and vibration.

[0015] 2. This utility model directly absorbs system vibration through an elastic buffer sleeve, reducing the impact load at the connection between the joint and the oil pipe. Combined with the arc transition design of the limiting block, it avoids fatigue cracks caused by vibration and extends the overall service life of the joint. At the same time, the tapered flared guide section facilitates quick insertion and positioning of the oil pipe. The structure is compact and does not require complex assembly tools. The nitriding treatment layer of the joint body is compatible with various high-pressure hydraulic media and can be widely used in different high-pressure hydraulic systems. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the oil pipe connection end of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the connector body of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Connector body; 2. Oil pipe connection end; 3. Equipment docking end; 4. Guide section; 5. Sealing section; 6. Limiting section; 7. External thread; 8. Annular pressure relief groove; 9. Pressure relief hole; 10. Elastic pressure relief diaphragm; 11. V-shaped elastic sealing ring; 12. Metal sealing gasket; 13. Arc-shaped groove; 14. Limiting block; 15. Arc-shaped protrusion; 16. Elastic buffer sleeve; 17. Annular retaining edge; 18. Nitriding treatment layer. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] This utility model discloses a rupture-resistant high-pressure system connector.

[0024] This utility model provides, for example Figure 1-3 The diagram shows a rupture-resistant high-pressure system connector, comprising a connector body 1, an oil pipe connection end 2, and an equipment docking end 3. The oil pipe connection end 2 is located on one side of the connector body 1, and the equipment docking end 3 is located on the other side. The oil pipe connection end 2 has a guide section 4, a sealing section 5, and a limiting section 6 inside. The equipment docking end 3 has external threads 7 on its surface. The connector body 1 has an annular pressure relief groove 8 on its surface. Multiple pressure relief holes 9 are penetrating the surface of the connector body 1 inside the annular pressure relief groove 8, with the other ends of each pressure relief hole 9 communicating with the interior of the annular pressure relief groove 8. An elastic pressure relief membrane 10 is provided inside the annular pressure relief groove 8 to effectively disperse high pressure, avoid local pressure concentration, and significantly improve the rupture resistance of the connector body.

[0025] This utility model discloses a rupture-resistant high-pressure system connector. The sealing section 5 is provided with a V-shaped elastic sealing ring 11 and a metal sealing gasket 12 inside. The V-shaped elastic sealing ring 11 is a fluororubber ring, and the metal sealing gasket 12 has an arc-shaped groove 13 on one side to achieve double sealing, with excellent sealing effect and effectively prevent leakage.

[0026] This utility model discloses a rupture-resistant high-pressure system connector. A limiting block 14 is fixedly installed inside the limiting section 6. An arc-shaped protrusion 15 is provided on one side of the limiting block 14. The arc-shaped protrusion 15 fits tightly inside the arc-shaped groove 13, further improving the sealing reliability.

[0027] This utility model discloses a rupture-resistant high-pressure system connector. An elastic buffer sleeve 16 is fixedly installed on the surface of the oil pipe connection end 2. An annular flange 17 is fixedly installed on one side of the elastic buffer sleeve 16. One side of the annular flange is tightly fitted with one side of the connector body 1 to restrict the axial displacement of the buffer sleeve.

[0028] This utility model discloses a rupture-resistant high-pressure system connector, wherein the connector body 1 has a nitrided layer 18 inside, which improves the wear resistance and corrosion resistance of the connector body 1.

[0029] This utility model discloses a rupture-resistant high-pressure system connector, wherein the guide section 4 has a tapered flared structure.

[0030] During use, the oil pipe is inserted along the tapered flared guide section 4 of the oil pipe connection end 2 until the end of the oil pipe abuts against the limiting block 14 in the limiting section 6. The arc-shaped protrusion 15 on one side of the limiting block 14 fits tightly against the arc-shaped groove 13 of the metal sealing gasket 12, which limits the insertion depth of the oil pipe and avoids stress concentration at the connection. The connector body 1 is fixed to the hydraulic equipment through the external thread 7 of the equipment docking end 3 to complete the assembly. Under high pressure conditions, part of the pressure in the inner cavity of the connector body 1 is directly diverted to the annular pressure relief groove 8 on the surface of the connector body 1 through the pressure relief holes 9 evenly distributed in the circumference. When the pressure rises abnormally, the elastic pressure relief membrane 10 in the annular pressure relief groove 8 undergoes elastic deformation to absorb the pressure impact, avoid pressure concentration at the connection end of the oil pipe and the connector, and prevent local rupture. The V-shaped elastic sealing ring 11 in the sealing section 5 opens towards the connector body 1. The inner cavity is sealed by high-pressure hydraulic oil, which squeezes the opening of the sealing ring so that its two side walls are tightly fitted to the outer wall of the oil pipe and the inner wall of the connector body 1, respectively, to achieve a self-tightening seal. At the same time, the metal sealing gasket 12 is in line contact with the arc-shaped protrusion 15 of the limiting block 14 through the arc-shaped groove 13, forming a secondary seal. The dual structure effectively resists the risk of seal failure under high pressure and vibration conditions. The elastic buffer sleeve 16 on the surface of the oil pipe connection end 2 directly absorbs the vibration energy generated during the operation of the hydraulic system, reducing the transmission of vibration to the connection between the oil pipe and the connector. The annular flange 17 on one side of the elastic buffer sleeve 16 is tightly fitted to the connector body 1, limiting its own axial displacement, ensuring buffer stability, and reducing the probability of fatigue cracks caused by long-term use. The nitrided layer 18 on the inner wall of the connector body 1 improves the wear resistance and corrosion resistance of the inner wall, extending the service life of the connector in high-pressure media environments.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A rupture-resistant high-pressure system connector, comprising a connector body (1), an oil pipe connection end (2), and an equipment docking end (3), characterized in that, One side of the connector body (1) is provided with an oil pipe connection end (2), and the other side of the connector body (1) is provided with an equipment docking end (3). The oil pipe connection end (2) is provided with a guide section (4), a sealing section (5) and a limiting section (6) inside. The surface of the equipment docking end (3) is provided with an external thread (7). The surface of the connector body (1) is provided with an annular pressure relief groove (8). The surface of the connector body (1) located inside the annular pressure relief groove (8) is provided with multiple pressure relief holes (9). The other end of the multiple pressure relief holes (9) is connected to the inside of the annular pressure relief groove (8). The inside of the annular pressure relief groove (8) is provided with an elastic pressure relief membrane (10).

2. The anti-rupture high-pressure system connector according to claim 1, characterized in that, The sealing section (5) is provided with a V-shaped elastic sealing ring (11) and a metal sealing gasket (12) inside. The V-shaped elastic sealing ring (11) is a fluororubber ring, and the metal sealing gasket (12) has an arc-shaped groove (13) on one side.

3. The anti-rupture high-pressure system connector according to claim 1, characterized in that, A limiting block (14) is fixedly installed inside the limiting section (6). An arc-shaped protrusion (15) is provided on one side of the limiting block (14). The arc-shaped protrusion (15) fits tightly inside the arc-shaped groove (13).

4. The anti-rupture high-pressure system connector according to claim 1, characterized in that, An elastic buffer sleeve (16) is fixedly installed on the surface of the oil pipe connection end (2). An annular flange (17) is fixedly installed on one side of the elastic buffer sleeve (16). One side of the annular flange is tightly fitted with one side of the connector body (1).

5. The anti-rupture high-pressure system connector according to claim 1, characterized in that, The connector body (1) has a nitrided layer (18) inside.

6. The anti-rupture high-pressure system connector according to claim 1, characterized in that, The guide section (4) has a tapered flared structure.

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