A hydraulic pipe fitting

Abstract

This utility model relates to the field of pipe joint technology, specifically a hydraulic pipe joint, comprising a joint body, an outer pipe, a limiting component, and a sealing component. The outer pipe is threaded into a groove on one side of the joint body. The limiting component is disposed on the joint body and the outer pipe. The sealing component is disposed inside the joint body and in sealing contact with the outer pipe. The limiting component includes a limiting sleeve with an internal thread on its inner wall, which is screwed onto the outer wall of the joint body. The limiting component also includes a movable groove on the joint body and an inner retaining groove on the outer pipe. The movable groove contains a limiting steel ball, which corresponds to the inner retaining groove. This design achieves a double-reinforced connection between the outer pipe and the joint body, ensuring the strength of the connection between the outer pipe and the joint body while preventing loosening due to pressure or external forces, significantly improving the safety of the joint.

Description

Technical Field

[0001] This utility model relates to the field of pipe joint technology, and in particular to a hydraulic pipe joint. Background Technology

[0002] During the operation of a hydraulic system, hydraulic pipe fittings are the core components connecting pipelines and hydraulic elements. The stability and sealing performance of their connection are crucial. Traditional hydraulic pipe fittings often use a single threaded connection or clamp fixing method for connection and limiting. When subjected to hydraulic shock or vibration for a long time, this structure is prone to problems such as loosening of threads and detachment of clamps, which can lead to relative displacement between the pipeline and the fitting, affecting the normal operation of the system.

[0003] In terms of sealing performance, the sealing structure of traditional hydraulic pipe fittings is relatively simple, usually relying on a single sealing ring to achieve a seal. However, in actual working conditions, temperature changes in the hydraulic medium will cause thermal expansion and contraction of the pipeline and fittings. There may also be slight dimensional deviations or positional offsets in the external pipe during installation. These factors can all lead to gaps between the sealing ring and the contact surface, resulting in leakage problems. Moreover, traditional sealing rings lack effective self-adjustment capabilities, making it difficult to cope with the sealing requirements under complex working conditions. They require frequent maintenance and replacement, increasing operating costs and downtime. Therefore, we need to upgrade and modify the existing technology to overcome the existing problems and shortcomings. Utility Model Content

[0004] The purpose of this utility model is to provide a hydraulic pipe joint to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] Design a hydraulic pipe fitting, including a fitting body, an outer pipe, a limiting component, and a sealing component. The outer pipe is threaded into a groove on one side of the fitting body. The limiting component is disposed on the fitting body and the outer pipe. The sealing component is disposed on the inner side of the fitting body and is in sealing contact with the outer pipe.

[0007] The limiting component includes a limiting sleeve, the inner wall of which is provided with an internal thread and the internal thread is screwed onto the outer wall of the connector body. The limiting component also includes a movable groove on the connector body and an inner retaining groove on the outer pipe. The movable groove is provided with a limiting steel ball and the limiting steel ball corresponds to the inner retaining groove.

[0008] Preferably, the limiting component further includes a plug-in seat and a limiting seat. The plug-in seat is fixedly connected to the outer wall of the limiting sleeve, and the limiting seat is fixedly disposed on the outer wall of the connector body and corresponds to the plug-in seat. A limiting bolt passes through the plug-in seat and the front end of the limiting bolt is connected to the limiting seat.

[0009] Preferably, the inner wall of the end of the limiting sleeve away from the connector body is provided with an inclined surface, and the inclined surface is in corresponding contact with the limiting steel ball. The outer wall of the limiting sleeve is provided with anti-slip texture, and the anti-slip texture is evenly distributed in a ring.

[0010] Preferably, the sealing assembly includes two sets of mounting grooves formed on the inner wall of the connector body, wherein an inner sealing ring and an outer sealing ring are respectively provided in the mounting grooves, and the inner sealing ring and the outer sealing ring respectively make sealing contact with the inner wall and the outer wall of the outer pipe.

[0011] Preferably, an outer groove is provided on the outer side of the inner sealing ring, an auxiliary rubber ring is provided in the outer groove, and a shape memory alloy wire is embedded inside the auxiliary rubber ring, and the shape memory alloy wire is distributed in a ring.

[0012] Preferably, the inner sealing ring has an inner cavity, and elastic rubber strips are evenly distributed in the inner cavity, and the elastic rubber strips are arranged radially.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model features a limiting component within the device. A limiting steel ball is filled into the inner slot, and a limiting sleeve pushes the limiting steel ball downward to abut against the inner slot. A limiting bolt secures the plug seat and the limiting seat together. This achieves a double-reinforced connection between the external pipe and the connector body, ensuring the strength of the connection between the external pipe and the connector body while preventing loosening caused by pressure or external force. This significantly improves the safety and stability of the hydraulic pipe connector.

[0015] 2. This utility model features a sealing component within the device. The deformation of the shape memory alloy wire causes the auxiliary rubber ring to change accordingly, ensuring that the auxiliary rubber ring always fits tightly against the inner wall of the outer pipe. The elastic rubber strip provides the inner sealing ring with the ability to expand and contract and reset, enabling adaptive compensation sealing of the outer pipe. It automatically adjusts the sealing state according to temperature changes without manual intervention, can cope with temperature fluctuations under different working conditions, and can adapt to minor dimensional deviations and positional offsets that may occur during the installation or use of the outer pipe, reducing the impact of insufficient installation accuracy.

[0016] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure according to the present utility model;

[0019] Figure 2 This is a cross-sectional view of the internal structure according to the present invention;

[0020] Figure 3 An exploded view of the limiting component according to this utility model;

[0021] Figure 4 This is an exploded view of the sealing assembly according to the present invention.

[0022] In the diagram: 1. Connector body; 2. Outer pipe; 3. Limiting component; 31. Limiting sleeve; 32. Internal thread; 33. Movable groove; 34. Inner retaining groove; 35. Limiting steel ball; 36. Insertion socket; 37. Limiting seat; 38. Limiting bolt; 4. Sealing component; 41. Mounting groove; 42. Inner sealing ring; 43. Outer sealing ring; 44. Outer retaining groove; 45. Auxiliary rubber ring; 46. Shape memory alloy wire; 47. Inner cavity; 48. Elastic rubber strip. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figure 1 As shown in Figure 4, this embodiment provides a hydraulic pipe fitting, including a fitting body 1, an outer pipe 2, a limiting component 3, and a sealing component 4. The outer pipe 2 is threadedly connected to a groove on one side of the fitting body 1. The limiting component 3 is disposed on the fitting body 1 and the outer pipe 2. The sealing component 4 is disposed on the inner side of the fitting body 1 and is in sealing contact with the outer pipe 2.

[0025] In this embodiment, the limiting component 3 includes a limiting sleeve 31. The inner wall of the limiting sleeve 31 is provided with an internal thread 32, and the internal thread 32 is screwed onto the outer wall of the connector body 1. The limiting component 3 also includes a movable groove 33 formed on the connector body 1 and an inner retaining groove 34 formed on the outer pipe 2. A limiting steel ball 35 is provided in the movable groove 33, and the limiting steel ball 35 corresponds to the inner retaining groove 34. The limiting component 3 also includes a plug-in seat 36 and a limiting seat 37. The plug-in seat 36 is fixedly connected to the outer wall of the limiting sleeve 31, and the limiting seat 37 is fixedly disposed on the outer wall of the connector body 1 and corresponds to the plug-in seat 36. A limiting bolt 38 passes through the plug-in seat 36, and the front end of the limiting bolt 38 is connected to the limiting seat 37. The limiting sleeve 31 The inner wall of the end away from the connector body 1 is provided with an inclined surface, and the inclined surface is in contact with the limiting steel ball 35. The outer wall of the limiting sleeve 31 is provided with anti-slip texture, and the anti-slip texture is evenly distributed in a ring. The limiting steel ball 35 fills the inner groove 34. The limiting sleeve 31 pushes the limiting steel ball 35 down and abuts it in the inner groove 34. The plug seat 36 and the limiting seat 37 are fixedly connected by the limiting bolt 38. This can realize the double reinforcement connection between the external pipe 2 and the connector body 1, which can not only ensure the strength of the connection between the external pipe 2 and the connector body 1, but also prevent the loosening problem caused by pressure or external force between the pipeline and the connector. This significantly improves the safety and stability of the hydraulic pipe connector.

[0026] In this embodiment, the sealing assembly 4 includes two sets of mounting grooves 41 formed on the inner wall of the connector body 1. An inner sealing ring 42 and an outer sealing ring 43 are respectively provided in the mounting grooves 41. The inner sealing ring 42 and the outer sealing ring 43 are in sealing contact with the inner and outer walls of the outer pipe 2, respectively. An outer retaining groove 44 is formed on the outer side of the inner sealing ring 42. An auxiliary rubber ring 45 is provided in the outer retaining groove 44. A shape memory alloy wire 46 is embedded inside the auxiliary rubber ring 45, and the shape memory alloy wire 46 is distributed in a ring shape. An inner cavity 47 is formed inside the inner sealing ring 42. Elastic rubber strips 48 are evenly distributed in the inner cavity 47. The 48 are arranged radially. The shape memory alloy wire 46 deforms and drives the auxiliary rubber ring 45 to change accordingly, so that the auxiliary rubber ring 45 is always in close contact with the inner wall of the outer pipe 2. The elastic rubber strip 48 provides the inner sealing ring 42 with the ability to expand and contract and reset. The outer sealing ring 43 is always in contact with the outer wall of the outer pipe 2, which can realize the adaptive compensation seal of the outer pipe 2. It automatically adjusts the sealing state with the temperature change without manual intervention. It can cope with temperature fluctuations under different working conditions and can adapt to the small size deviations and positional offsets that may occur in the installation or use of the outer pipe 2, reducing the impact of insufficient installation accuracy.

[0027] The working principle and process of this utility model are as follows: In use, the outer tube 2 is connected to the groove on one side of the connector body 1, so that the limiting steel ball 35 falls into the inner slot 34. The limiting sleeve 31 is rotated by the internal thread 32 and squeezes the outer side of the limiting steel ball 35, so that the limiting steel ball 35 cannot move in the movable slot 33. Finally, the plug seat 36 and the limiting seat 37 are fixedly connected by the limiting bolt 38, thus completing the connection between the outer tube 2 and the connector body 1. When the temperature changes, the shape memory alloy wire 46 deforms: when the temperature rises, its contraction drives the auxiliary rubber ring 45 to tighten, forming radial pressure on the outer side of the inner sealing ring 42, forcing the inner side of the inner sealing ring 42 to expand, and the radial elastic rubber strip 48 in the inner cavity 47 deforms under pressure; when the temperature drops, the shape memory alloy wire 46 returns to its initial shape, the tightening force of the auxiliary rubber ring 45 weakens, the elastic rubber strip 48 rebounds, and the outer sealing ring 43 is always in contact with the outer wall of the outer tube 2.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

Claims

1. A hydraulic pipe fitting, characterized in that, It includes a connector body (1), an outer tube (2), a limiting component (3) and a sealing component (4). The outer tube (2) is threadedly connected to a groove on one side of the connector body (1). The limiting component (3) is disposed on the connector body (1) and the outer tube (2). The sealing component (4) is disposed inside the connector body (1) and is in sealing contact with the outer tube (2). The limiting component (3) includes a limiting sleeve (31), the inner wall of the limiting sleeve (31) is provided with an internal thread (32) and the internal thread (32) is screwed onto the outer wall of the connector body (1). The limiting component (3) also includes a movable groove (33) opened on the connector body (1) and an inner locking groove (34) opened on the outer pipe (2). The movable groove (33) is provided with a limiting steel ball (35) and the limiting steel ball (35) corresponds to the inner locking groove (34).

2. A hydraulic pipe fitting according to claim 1, characterized in that: The limiting component (3) further includes a plug-in seat (36) and a limiting seat (37). The plug-in seat (36) is fixedly connected to the outer wall of the limiting sleeve (31). The limiting seat (37) is fixedly disposed on the outer wall of the connector body (1) and corresponds to the plug-in seat (36). A limiting bolt (38) passes through the plug-in seat (36) and the front end of the limiting bolt (38) is connected to the limiting seat (37).

3. A hydraulic pipe fitting according to claim 1, characterized in that: The inner wall of the limiting sleeve (31) away from the connector body (1) is provided with an inclined surface, and the inclined surface is in contact with the limiting steel ball (35). The outer wall of the limiting sleeve (31) is provided with anti-slip texture, and the anti-slip texture is evenly distributed in a ring.

4. A hydraulic pipe fitting according to claim 1, characterized in that: The sealing assembly (4) includes two sets of mounting grooves (41) formed on the inner wall of the connector body (1). The mounting grooves (41) are respectively provided with an inner sealing ring (42) and an outer sealing ring (43). The inner sealing ring (42) and the outer sealing ring (43) are in sealing contact with the inner wall and the outer wall of the outer pipe (2), respectively.

5. A hydraulic pipe fitting according to claim 4, characterized in that: The inner sealing ring (42) has an outer groove (44) on its outer side. An auxiliary rubber ring (45) is provided in the outer groove (44). A memory alloy wire (46) is embedded in the auxiliary rubber ring (45) and the memory alloy wire (46) is distributed in a ring.

6. A hydraulic pipe fitting according to claim 4, characterized in that: The inner sealing ring (42) has an inner cavity (47) inside, and elastic rubber strips (48) are evenly distributed in the inner cavity (47) and are arranged radially.

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