Detachable high-pressure oil pipe joint

Abstract

The detachable high-pressure oil pipe connector comprises an inner core used for conveying liquid, the right end of the inner core is connected with a connecting nut used for being connected with the outlet end of an oil pump, and the left end of the inner core is connected with a necking nut used for being matched with the inner core to fasten a high-pressure oil pipe. The left end of the inner core is a buckling part matched with the necking nut, the left side of the buckling part is provided with a buckling cavity which is concave inwards in the axial direction of the inner core, and buckling barbs which can be tightly attached are oppositely arranged in the buckling cavity. And a movable pressing sleeve capable of shrinking and deforming after being extruded is arranged on the left side of the buckling part. The left end of the necking nut is provided with a gradual change pressing sleeve matched with the movable pressing sleeve, and the inner diameter of the gradual change pressing sleeve is gradually reduced from right to left. The utility model solves the problems that the connector and the high-pressure oil pipe need to be buckled and pressed by special equipment when being connected, the installation is inconvenient and the repeated use cannot be realized.

Description

Technical Field

[0001] This utility model relates to the field of oil pipe connection technology, specifically to a high-pressure oil pipe connector that is easy to disassemble. Background Technology

[0002] High-pressure hydraulic hose fittings are key components used to connect high-pressure hydraulic hoses and transmit hydraulic power. Detachable high-pressure hydraulic hose fittings are widely used in engineering machinery, shipbuilding, aerospace, and other fields, especially in applications requiring frequent replacement of high-pressure hydraulic hoses. Their greatest advantage is the ability to quickly replace high-pressure hydraulic hoses, thereby ensuring the operational efficiency of the hydraulic system.

[0003] Chinese utility model patent CN208634595U discloses a high-pressure oil pipe assembly connector, including a shell, a nut, and a core. The shell and nut are respectively disposed opposite to each other at both ends of the core. One end of the shell is connected to the high-pressure oil pipe, and the other end of the nut is connected to the interface of the oil pump. The inner wall of the shell is provided with annular toothed plates that connect to the high-pressure oil pipe. The annular toothed plates are pressed into the rubber layer of the high-pressure oil pipe radially inward along the shell. The solution provided by this patent solves the problems of insufficient firmness and poor sealing between the assembly connector and the high-pressure oil pipe. However, it also has shortcomings. Special equipment is required to press the shell and the high-pressure oil pipe together during installation, making the connector unusable. Utility Model Content

[0004] This utility model proposes a detachable high-pressure oil pipe connector, the purpose of which is to solve the problem that special equipment is required for crimping when connecting the connector to the high-pressure oil pipe, which is inconvenient to install and cannot be reused.

[0005] The technical solution of this utility model is as follows:

[0006] A detachable high-pressure oil pipe connector includes an inner core for conveying liquid. A connecting nut for connecting to the outlet end of an oil pump is connected to the right end of the inner core, and a necking nut for engaging with and fastening a high-pressure oil pipe is connected to the left end of the inner core. The left end of the inner core is a clamping portion that engages with the necking nut. A clamping cavity is formed on the left side of the clamping portion, recessed along the axial direction of the inner core. Clamping barbs are arranged opposite each other within the clamping cavity. Multiple V-shaped grooves, wider on the outside and narrower on the inside, are distributed around the left circumference of the clamping portion. These V-shaped grooves divide the outer portion of the clamping cavity into a movable pressure sleeve that can contract and deform under pressure. The left end of the necking nut has a tapered pressure sleeve that engages with the movable pressure sleeve, the inner diameter of which gradually decreases from right to left. A first threaded connection portion is also provided on the right side of the clamping portion. A third threaded connection portion engages with the first threaded connection portion on the right end of the necking nut.

[0007] As a further improvement of this utility model, the clamping cavity is an annular cavity, and the cylindrical sidewall of its outer ring is provided with multiple first clamping hooks. Correspondingly, the cylindrical sidewall of its inner ring is provided with multiple second clamping hooks. When the outer ring is squeezed, the first clamping hooks on it will be driven to stick to the second clamping hooks.

[0008] As a further improvement of this utility model, the inner core is provided with a flange on the right end, and an annular groove is provided on the left side of the flange. The connecting nut is provided with a convex ring on the left end for cooperating with the flange on the right end of the inner core to prevent the connecting nut and the inner core from separating. The convex ring is rotatably connected in the annular groove.

[0009] Compared with the prior art, the present invention has the following advantages:

[0010] This device features a ring-shaped clamping cavity on its inner core, with multiple sets of first and second clamping hooks arranged opposite each other on the cylindrical sidewalls of both the outer and inner rings of the clamping cavity. After inserting the high-pressure oil pipe, tightening the necking nut and inner core causes the movable pressure sleeve at the left end of the inner core to contract under the pressure of the gradually changing sleeve inside the necking nut, thus clamping the high-pressure oil pipe. Loosening the necking nut in the opposite direction releases the clamping. This allows for clamping and releasing of the connector and high-pressure oil pipe without the need for additional equipment, without damaging the connector and enabling reuse, greatly improving the convenience and efficiency of maintenance. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0012] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0013] Figure 3 This is an assembly structure diagram of a high-pressure oil pipe connector according to an embodiment of the present invention (the left end is the crimping cavity).

[0014] Explanation of reference numerals in the attached figures:

[0015] In the diagram: 1. Inner core; 1-1. V-groove; 1-2. First threaded connection; 1-3. External hexagon; 1-4. Flange; 1-5. Sealing surface; 1-6. Movable pressure sleeve; 1-7. Crimping cavity; 1-8. First crimping barb; 1-9. Second crimping barb; 2. Connecting nut; 2-1. Large hexagon; 2-2. Second threaded connection; 3. Necked nut; 3-1. Necked hexagon; 3-2. Third threaded connection; 3-3. Gradient pressure sleeve. Detailed Implementation

[0016] The technical solution and effects of this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0017] like Figure 1 and Figure 2 A detachable high-pressure oil pipe fitting includes an inner core 1 for conveying liquid, one end of the inner core 1 ( Figure 1 The right end of the middle section is connected to a connecting nut 2 for connecting to the oil pump outlet end, and the other end ( Figure 1 The left end of the inner core 1 is connected to a necked nut 3 for engaging with the inner core 1 to fasten the high-pressure oil pipe.

[0018] like Figure 2 and Figure 3 The left end of the inner core 1 is a clamping part that cooperates with the necking nut 3 to fasten the high-pressure oil pipe. A clamping cavity 1-7, recessed along the axial direction of the inner core 1, is provided on the left side of the clamping part for inserting and fastening the high-pressure oil pipe. For example... Figure 2 The clamping chamber 1-7 is an annular cavity, with multiple first clamping hooks 1-8 on the cylindrical sidewall of its outer ring, and correspondingly, multiple second clamping hooks 1-9 on the cylindrical sidewall of its inner ring. When the outer ring is compressed, the first clamping hooks 1-8 on it are driven to press against the second clamping hooks 1-9, thus clamping the high-pressure oil pipe.

[0019] like Figure 1 The left side of the clamping part has multiple V-shaped grooves 1-1 with a wide outer edge and a pointed inner edge. These V-shaped grooves divide the outer part of the clamping cavity 1-7 into a movable pressure sleeve 1-6 that can shrink and deform after being squeezed. The left end of the necked nut 3 is provided with a tapered pressure sleeve 3-3 that cooperates with the movable pressure sleeve 1-6. The inner diameter of the tapered pressure sleeve 3-3 gradually decreases from right to left.

[0020] like Figure 1 The right side of the clamping part is also provided with a first threaded connection part 1-2. The right end of the necked nut 3 is provided with a third threaded connection part 3-2 that mates with the first threaded connection part 1-2 on the right end of the clamping part. For easy clamping, the right end of the clamping part is also provided with an external hexagon 1-3.

[0021] Furthermore, such as Figure 2 The inner core 1 has a flange 1-4 at its right end, and an annular groove is provided between the flange 1-4 and the outer hexagon 1-3. The connecting nut 2 has a raised ring at its left end for engaging with the flange 1-4 at the right end of the inner core 1 to prevent the connecting nut 2 from disengaging from the inner core 1. The raised ring is rotatably connected in the annular groove. The connecting nut 2 also has a second threaded connection part 2-2 at its right end for connecting to the oil pump outlet end.

[0022] The right end face of the flange 1-4 is the sealing surface 1-5, which is used to cooperate with the sealing element connected to the oil pump outlet end to achieve sealing.

[0023] The following examples illustrate the usage of this utility model:

[0024] After the inner core 1 and connecting nut 2 are processed, they are crimped together using specialized equipment to complete the pre-assembly, eliminating the need for specialized equipment during subsequent use. In use, first connect the connecting nut 2 to the oil pump outlet. Then, pass the high-pressure oil pipe through the necking nut 3 and insert it into the crimping cavity 1-7. Place the necking nut 3 on the outside of the movable pressure sleeve 1-6. Next, tighten it through the first threaded connection part 1-2 and the third threaded connection part 3-2. The movable pressure sleeve 1-6 contracts under the compression of the tapered pressure sleeve 3-3, causing the first crimping hook 1-8 to move closer to the second crimping hook 1-9, thus securing the high-pressure oil pipe. When the high-pressure oil pipe is damaged and needs repair or replacement, simply loosen the necking nut 3 in the opposite direction to release the crimping pressure, then pull the high-pressure oil pipe out of the crimping cavity 1-7 for subsequent operations, achieving non-destructive disassembly and enabling reuse.

[0025] The detachable high-pressure oil pipe connector described in this embodiment features convenient assembly and disassembly, is not damaged during operation, and can be reused. Furthermore, the installation of this connector does not require specialized equipment, enabling its application in environments with limited power supply (such as underground mines and deserts) and in scenarios lacking specialized hose crimping equipment, significantly improving the efficiency of maintenance work.

[0026] It should be noted that, as will be apparent to those skilled in the art, this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. The scope of this utility model is defined by the claims rather than the foregoing description.

Claims

1. A detachable high-pressure oil pipe joint comprising an inner core (1) for conveying a liquid, characterized in that: The right end of the inner core (1) is connected with a connecting nut (2) for connecting with the outlet end of the oil pump, and the left end of the inner core (1) is connected with a necked nut (3) for buckling the high-pressure oil pipe; the left end of the inner core (1) is a buckling portion matched with the necked nut (3), the left side of the buckling portion is provided with a buckling cavity (1-7) concave inward along the axial direction of the inner core (1), and the buckling cavity (1-7) is relatively provided with buckling hooks capable of being close to each other; the left side of the buckling portion is circumferentially provided with a plurality of V-shaped grooves (1-1) with outer width and inner sharpness, the V-shaped grooves (1-1) divide the part outside the buckling cavity (1-7) to form movable pressure sleeves (1-6) capable of being deformed after being extruded; the left end of the necked nut (3) is provided with a gradually changing pressure sleeve (3-3) matched with the movable pressure sleeve (1-6), the inner diameter of the gradually changing pressure sleeve (3-3) gradually decreases from right to left; the right side of the buckling portion is further provided with a first threaded connection portion (1-2); the right end of the necked nut (3) is provided with a third threaded connection portion (3-2) matched with the first threaded connection portion (1-2).

2. The detachable high pressure oil pipe joint of claim 1, wherein: The buckling cavity (1-7) is a circular annular cavity, a plurality of first buckling hooks (1-8) are arranged on the cylindrical side wall of the outer ring, and a plurality of second buckling hooks (1-9) are arranged on the cylindrical side wall of the inner ring correspondingly, the first buckling hooks (1-8) on the outer ring are driven to be close to the second buckling hooks (1-9) after being extruded.

3. The detachable high pressure oil pipe joint of claim 1, wherein: The right end of the inner core (1) is provided with a flange (1-4), the left side of the flange (1-4) is provided with an annular groove, the left end of the connecting nut (2) is provided with a convex ring for cooperating with the right end flange (1-4) of the inner core (1) to prevent the connecting nut (2) and the inner core (1) from being separated, and the convex ring is rotatably connected in the annular groove.

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