Leakage-proof hydraulic pipe joint

Abstract

The utility model discloses a leakproof hydraulic pipe joint, which relates to the field of hydraulic pipe joints, and comprises a joint main body, the joint main body is in threaded connection with the end part of a hydraulic pipeline, the end part of the hydraulic pipeline is provided with a mounting groove, a sealing rubber ring is clamped and mounted in the mounting groove, and the two sides of the sealing rubber ring are provided with limiting mounting blocks. The hydraulic pipeline and the connector body are detached by twisting the hydraulic pipeline, then the sealing rubber ring embedded in the hydraulic pipeline is directly dragged out, the aged sealing rubber ring can be replaced, the bottom faces of the limiting installation blocks fixedly connected with the two sides of a new sealing rubber ring are aligned with the inclined faces, the sealing rubber ring is pressed downwards, and the sealing rubber ring is replaced. The limiting installation blocks made of soft materials can be matched with the installation notches after being extruded to deform, the sealing rubber rings are clamped in the installation grooves, then the connector body and the hydraulic pipeline are in threaded connection, the sealing rubber rings abut against the step faces, and then sealing connection of the connector body and the hydraulic pipeline can be completed.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic pipe joints, and particularly relates to a leak-proof hydraulic pipe joint. Background Technique

[0002] As an important component for connecting pipelines, the hydraulic pipe joint plays an irreplaceable role in the hydraulic system. The hydraulic joint is widely used in fields such as mechanical equipment, construction machinery, aerospace, etc. Especially in construction machinery, it plays the role of connecting, converting the fluid direction, and distributing the flow rate in the hydraulic system. The hydraulic pipe joint has good sealing performance and durability, and can maintain good working effects under high-pressure and high-temperature environments.

[0003] For the existing leak-proof hydraulic pipe joint and the hydraulic pipe, during the connection, the leak-proof of the connection between the joint and the hydraulic pipe is usually ensured through the cooperation of an anti-slip pad and an anti-seepage ring. However, the following problems still exist when using the anti-slip pad and the anti-seepage ring: The anti-slip pad and the anti-seepage ring in the leak-proof hydraulic pipe joint may age after being used for a long time. The anti-slip pad and the anti-seepage ring are both adhesively bonded to the joint, which makes it inconvenient to replace the anti-slip pad and the anti-seepage ring. At the same time, the aging of the anti-slip pad and the anti-seepage ring may lead to poor sealing performance of the entire hydraulic pipe joint, resulting in abnormalities in subsequent use.

[0004] Therefore, it is very necessary to invent a leak-proof hydraulic pipe joint to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a leak-proof hydraulic pipe joint to solve the problems in the above background technique, that is, the anti-slip pad and the anti-seepage ring in the leak-proof hydraulic pipe joint may age after being used for a long time. The anti-slip pad and the anti-seepage ring are both adhesively bonded to the joint, which makes it inconvenient to replace the anti-slip pad and the anti-seepage ring. At the same time, the aging of the anti-slip pad and the anti-seepage ring may lead to poor sealing performance of the entire hydraulic pipe joint, resulting in abnormalities in subsequent use.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A leak-proof hydraulic pipe joint, including a joint body, the joint body is threadedly connected to the end of the hydraulic pipeline. An installation groove is provided at the end of the hydraulic pipeline, and a sealing rubber ring is snap-fitted inside the installation groove. Limiting installation blocks are provided on both sides of the sealing rubber ring, and the limiting installation blocks are matched and installed with the installation notches to prevent the sealing rubber ring from shifting when the joint body and the hydraulic pipeline are threadedly connected and twisted subsequently. An abutting ring is sleeved on the outer circle of the hydraulic pipeline, and the abutting ring is connected to the end of the joint body. The connection between the abutting ring and the end of the joint body plays a secondary leak-proof role.

[0007] Preferably, an installation thread is provided on the outer ring of one end of the hydraulic pipeline connected to the joint body, and the installation thread is matched with a thread groove provided inside the joint body to form a threaded connection. The threaded connection has self-locking property, and the stability of the connection between the hydraulic pipeline and the joint body is ensured through the threaded connection.

[0008] Preferably, there are two inclined surfaces on the top of the hydraulic pipeline corresponding to the positions of the installation notches, which facilitates the quick positioning and installation of the sealing rubber ring and the limit installation blocks fixedly connected to the outer wall of the sealing rubber ring through the inclined surfaces. When the sealing rubber ring is pressed down subsequently, the limit installation blocks can quickly match with the installation notches, ensuring that the sealing rubber ring is not detached from the installation groove.

[0009] Preferably, there is a step surface between the top end of the thread groove and the internal through hole of the joint body, and the inner diameter of the internal through hole of the joint body is equal to the inner diameter of the hydraulic pipeline. In this way, the top end of the sealing rubber ring can tightly abut against the step surface, realizing the preliminary leakage prevention of the connection between the hydraulic pipeline and the joint body.

[0010] Preferably, the installation groove is annular, and the top of the installation groove is open, and the inner wall of the installation groove is closely attached to the outer wall of the sealing rubber ring, facilitating the disassembly of the aged sealing rubber ring from the installation groove and the installation of a new sealing rubber ring into the installation groove subsequently.

[0011] Preferably, the limit installation block is in the shape of a horizontal trapezoid, the upper and lower surfaces of the limit installation block are inclined surfaces, and the outer wall of the limit installation block is attached to the inner wall of the installation notch, and the inclined surface at the corresponding position above the limit installation block is attached to the bottom surface of the limit installation block, ensuring the sealing performance of the connection between the hydraulic pipeline and the joint body;

[0012] The two limit installation blocks are symmetrically arranged with reference to the vertical central axis of the hydraulic pipeline. When the two limit installation blocks are engaged with the installation notches, when the hydraulic pipeline and the joint body are twisted to achieve a threaded connection, and at the same time when the top end of the sealing rubber ring just abuts against the step surface (there is still a twistable space at this time), there is friction between the sealing rubber ring and the step surface. If the limit installation blocks are not engaged with the installation notches, continuous twisting of the hydraulic pipeline may synchronously cause the sealing rubber ring to rotate inside the installation groove, and at the same time, it can ensure that the sealing rubber ring is engaged and connected to the installation groove and is not easily detached.

[0013] In the above technical solution, the technical effects and advantages provided by the present utility model are:

[0014] The utility model realizes the disassembly of the hydraulic pipeline and the joint body by twisting the hydraulic pipeline, and then directly pulls out the sealing rubber ring embedded inside the hydraulic pipeline to replace the aging sealing rubber ring. Align the bottom surface of the limit mounting blocks fixedly connected to both sides of the new sealing rubber ring with the inclined surface, press down the sealing rubber ring, and after the limit mounting blocks made of soft material are deformed by extrusion, they can match the mounting notch. The sealing rubber ring is clamped inside the mounting groove, and then the joint body and the hydraulic pipeline are threadedly connected. The sealing rubber ring abuts against the step surface, and thus the sealing connection between the joint body and the hydraulic pipeline is completed. Brief Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a three-dimensional view of the overall structure of the present utility model;

[0017] Figure 2 It is an exploded view of the joint body and the hydraulic pipeline of the present utility model;

[0018] Figure 3 It is an exploded view of the hydraulic pipeline and the sealing rubber ring of the present utility model;

[0019] Figure 4 It is a three-dimensional view of the joint body and the hydraulic pipeline (in a partially cut state) of the present utility model;

[0020] Figure 5 For the present utility model Figure 4 Schematic diagram of the enlarged effect at position A.

[0021] Explanation of the reference numerals in the drawings:

[0022] 1. Joint body; 101. Step surface; 2. Hydraulic pipeline; 3. Installation thread; 4. Thread groove; 5. Sealing rubber ring; 6. Installation groove; 7. Installation notch; 8. Limit mounting block; 9. Inclined surface; 10. Abutting ring. Detailed Description of the Embodiments

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the drawings.

[0024] The present utility model provides as Figures 1-5A leak-proof hydraulic pipe joint as shown includes a joint body 1. The joint body 1 is threadedly connected to the end of a hydraulic pipe 2. An installation groove 6 is provided at the end of the hydraulic pipe 2, and a sealing rubber ring 5 is snap-fitted inside the installation groove 6. Limiting installation blocks 8 are provided on both sides of the sealing rubber ring 5, and the limiting installation blocks 8 are fitted with installation notches 7, so as to prevent the sealing rubber ring 5 from shifting when the joint body 1 and the hydraulic pipe 2 are threadedly connected in a torsional manner later. A butting ring 10 is sleeved on the outer circle of the hydraulic pipe 2, and the butting ring 10 is connected to the end of the joint body 1. The connection between the butting ring 10 and the end of the joint body 1 plays a secondary leak-proof role.

[0025] An installation thread 3 is provided on the outer circle of one end of the hydraulic pipe 2 connected to the joint body 1, and the installation thread 3 is threadedly connected to a thread groove 4 provided inside the joint body 1. Threaded connection has self-locking property, and the stability of the connection between the hydraulic pipe 2 and the joint body 1 is ensured through threaded connection.

[0026] Two inclined surfaces 9 corresponding to the positions of the installation notches 7 are provided on the top of the hydraulic pipe 2, which facilitates the quick positioning and installation of the sealing rubber ring 5 and the limiting installation blocks 8 fixedly connected to the outer wall of the sealing rubber ring 5 through the inclined surfaces 9. When the sealing rubber ring 5 is pressed down later, the limiting installation blocks 8 can quickly match with the installation notches 7, ensuring that the installation of the sealing rubber ring 5 and the installation groove 6 does not fall off.

[0027] There is a step surface 101 between the top end of the thread groove 4 and the inner through hole of the joint body 1, and the inner diameter of the inner through hole of the joint body 1 is equal to the inner diameter of the hydraulic pipe 2. In this way, the top end of the sealing rubber ring 5 can tightly abut against the step surface 101, realizing the preliminary leak-proof of the connection between the hydraulic pipe 2 and the joint body 1.

[0028] The installation groove 6 is annular, and the top of the installation groove 6 is open, and the inner wall of the installation groove 6 is closely attached to the outer wall of the sealing rubber ring 5, so as to facilitate the disassembly of the aging sealing rubber ring 5 from the installation groove 6 and the installation of a new sealing rubber ring 5 into the installation groove 6 later.

[0029] The limiting installation block 8 is in the shape of a horizontal trapezoid, the upper and lower surfaces of the limiting installation block 8 are inclined surfaces, and the outer wall of the limiting installation block 8 is attached to the inner wall of the installation notch 7, and the inclined surface 9 at the corresponding position above the limiting installation block 8 is attached to the bottom surface of the limiting installation block 8, ensuring the sealing performance of the connection between the hydraulic pipe 2 and the joint body 1;

[0030] Two limit mounting blocks 8 are symmetrically arranged with reference to the vertical central axis of the hydraulic pipe 2. When the two limit mounting blocks 8 are engaged with the mounting notch 7, when the hydraulic pipe 2 and the joint body 1 are twisted to achieve threaded connection, and at the same time when the top end of the sealing rubber ring 5 just abuts against the step surface 101 (there is still a twistable space at this time), but there is friction between the sealing rubber ring 5 and the step surface 101. If the limit mounting block 8 and the mounting notch 7 are not engaged, continuously twisting the hydraulic pipe 2 may synchronously cause the sealing rubber ring 5 to rotate inside the mounting groove 6, and at the same time, it can also ensure that the sealing rubber ring 5 is engaged with the mounting groove 6 and is not easily detached.

[0031] Working principle: When using a leak-proof hydraulic pipe joint, first, the hydraulic pipe 2 is separated from the joint body 1 with threaded connection by twisting the hydraulic pipe 2. Then, the sealing rubber ring 5 embedded and installed inside the hydraulic pipe 2 is directly pulled out. The inclined inner wall of the mounting notch 7 that fits against the top inclined surface of the limit mounting block 8 that fits against it, causing the limit mounting block 8 and the sealing rubber ring 5 to be deformed by extrusion, so that the aging sealing rubber ring 5 can be replaced;

[0032] When installing a new sealing rubber ring 5, align the trapezoidal inclined bottom surfaces of the two symmetrically arranged limit mounting blocks 8 fixedly connected to both sides of the new sealing rubber ring 5 with the inclined surface 9 provided at the top of the hydraulic pipe 2. Then, press down the sealing rubber ring 5. The downward pressure acts on the soft material limit mounting block 8, causing the limit mounting block 8 to be deformed by extrusion and then match the mounting notch 7. At the same time, the sealing rubber ring 5 is clamped inside the mounting groove 6, so as to ensure the installation of the new sealing rubber ring 5 is completed. Then, when the joint body 1 and the hydraulic pipe 2 are twisted and installed, the two are threadedly connected, and the sealing rubber ring 5 abuts against the step surface 101, thus completing the sealing connection between the joint body 1 and the hydraulic pipe 2, and avoiding leakage when the joint body 1 and the hydraulic pipe 2 are connected due to the aging sealing rubber ring 5.

[0033] Only some exemplary embodiments of the present invention are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A leakproof hydraulic pipe joint, comprising a joint body (1), characterized in that: The joint body (1) is threadedly connected to the end of the hydraulic pipeline (2); the end of the hydraulic pipeline (2) is provided with a mounting groove (6), and a sealing rubber ring (5) is mounted in the mounting groove (6); limited mounting blocks (8) are provided on both sides of the sealing rubber ring (5), and the limited mounting blocks (8) are matched with the mounting notch (7) for mounting; the outer ring of the hydraulic pipeline (2) is sleeved with an abutment ring (10), and the abutment ring (10) is connected to the end of the joint body (1).

2. A leakproof hydraulic pipe joint according to claim 1, characterized in that: An outer ring of one end portion of the hydraulic pipe (2) connected to the joint body (1) is provided with a mounting thread (3), and the mounting thread (3) matches a thread groove (4) provided inside the joint body (1) to form a threaded connection.

3. A leakproof hydraulic pipe joint according to claim 2, characterized in that: The top of the hydraulic pipeline (2) is provided with two inclined surfaces (9) corresponding to the positions of the installation notches (7).

4. A leakproof hydraulic pipe joint according to claim 2, characterized in that: There is a step surface (101) between the thread groove (4) and the internal through hole of the joint body (1), and the inner circle diameter of the internal through hole of the joint body (1) is equal to the inner circle diameter of the hydraulic pipeline (2).

5. The leakproof hydraulic pipe joint according to claim 1, characterized in that: The installation groove (6) is annular, and the top of the installation groove (6) is open, and the inner wall of the installation groove (6) is tightly fitted with the outer wall of the sealing rubber ring (5).

6. The leakproof hydraulic pipe joint according to claim 1, characterized in that: The limit installation block (8) is in a transverse trapezoidal shape, the upper and lower surfaces of the limit installation block (8) are inclined surfaces, the outer wall of the limit installation block (8) is in contact with the inner wall of the installation notch (7), and the inclined surface (9) at a corresponding position above the limit installation block (8) is in contact with the bottom surface of the limit installation block (8); The two limit installation blocks (8) are symmetrically arranged with reference to the vertical central axis of the hydraulic pipeline (2) as the symmetry axis.

Images