Positioning nut for high-pressure oil pipe detection

Abstract

The utility model discloses a positioning nut for high-pressure oil pipe detection, and belongs to the technical field of high-pressure oil pipe detection. A positioning nut for high-pressure oil pipe detection comprises a threaded connection portion, one end of the threaded connection portion is fixedly connected with a collimation portion, a first cavity is formed in the threaded connection portion, a second cavity is formed in the collimation portion, the first cavity is communicated with the second cavity, the second cavity is cylindrical, and the difference between the diameter of the second cavity and the outer diameter of a high-pressure oil pipe is not larger than 0.4 mm. The end, away from the threaded connection part, of the collimation part is fixedly connected with a protection pad, the hardness of the protection pad is smaller than that of the high-pressure oil pipe, a third cylindrical cavity is formed in the middle of the protection pad and communicates with the second cavity, and the diameter of the third cavity is the same as that of the second cavity. Whether the axis of the end of the high-pressure oil pipe is on the axis of the external bolt or not can be judged by arranging the threaded connection part and the collimation part at the end of the high-pressure oil pipe in a sleeving mode and rotating the threaded connection part to the external bolt.

Description

Technical Field

[0001] This application relates to the field of high-pressure oil pipe testing technology, and more specifically, to a positioning nut for high-pressure oil pipe testing. Background Technology

[0002] High-pressure oil pipes are a component of high-pressure oil circuits. These pipes must withstand a certain oil pressure and possess fatigue resistance to ensure the sealing requirements of the pipeline. To facilitate installation and ensure the compactness of the oil circuit system structure, high-pressure oil pipes are mostly multi-bend designs. This allows them to bypass multiple components of the oil circuit system during installation, facilitating assembly.

[0003] As a method for testing high-pressure oil pipes: nut is fitted on both sides of the high-pressure oil pipe and then the oil pipe is fixed. The high-pressure oil pipe is tested for quality by whether the screwing of the nut is obstructed by the high-pressure oil pipe.

[0004] Because the ends of high-pressure oil pipes have very high sealing requirements, the roughness of the pipe fitting head must be very small, and the finished pipe fitting head needs very tight protection. Therefore, a nut with protective function is required for inspection. In view of this, we propose a positioning nut for high-pressure oil pipe inspection. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of this application is to provide a positioning nut for high-pressure oil pipe inspection, so as to solve the problems mentioned in the background art.

[0007] 2. Technical Solution

[0008] This application is achieved through the following technical solution:

[0009] A positioning nut for high-pressure oil pipe testing includes a threaded connection portion. A collimating portion is fixedly connected to one end of the threaded connection portion. The threaded connection portion has a first cavity inside, and the collimating portion has a second cavity inside. The first cavity and the second cavity communicate with each other. The second cavity is cylindrical, and the difference between the diameter of the second cavity and the outer diameter of the high-pressure oil pipe is no greater than 0.4 mm. A protective pad is fixedly connected to the end of the collimating portion away from the threaded connection portion. The hardness of the protective pad is less than that of the high-pressure oil pipe. A cylindrical third cavity is formed in the middle of the protective pad, communicating with the second cavity. The diameters of the third cavity and the second cavity are the same.

[0010] As an optional solution to the technical solution of this application, the diameter of the first cavity is larger than the diameter of the second cavity, and the thread of the threaded connection is disposed in the first cavity.

[0011] As an optional solution to the technical solution in this application, the protective pad is made of nylon.

[0012] As an optional solution to the technical solution in this application, the diameter of the second cavity is 12.4 mm.

[0013] As an optional solution to the technical solution in this application, the length of the second cavity is not less than 37mm.

[0014] As an optional solution to the technical solution in this application, the length of the first cavity is not less than 23mm.

[0015] As an optional solution to the technical solution of this application, the thickness of the protective pad is not less than 5mm, and the end of the third cavity away from the second cavity is flared.

[0016] As an optional solution to the technical solution of this application, the protective pad is provided with multiple mounting holes, the collimating part is provided with multiple mounting grooves at one end near the protective pad, and the protective pad and the collimating part are fixed together by bolts.

[0017] As an optional solution to the technical solution in this application, the outer surface of the collimation part is prismatic.

[0018] As an optional solution to the technical solution in this application, the outer surface of the collimation part is a regular square prism.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the beneficial effects of this application are:

[0021] This application, by providing a nut with a threaded connection and a straightening part, enables the determination of whether the axis of the high-pressure oil pipe end is on the axis of the external bolt by fitting the threaded connection and the straightening part onto the end of the high-pressure oil pipe and rotating the threaded connection to the external bolt, thereby increasing the efficiency of high-pressure oil pipe detection; and by connecting a protective pad to the end of the straightening part, the problem of the high-pressure oil pipe being scratched when it enters the device can be solved. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a positioning nut for high-pressure oil pipe testing;

[0023] Figure 2 This is a schematic diagram of the internal structure of a positioning nut used for high-pressure oil pipe testing.

[0024] Figure 3 This is a schematic diagram of the protective pad structure for a positioning nut used in high-pressure oil pipe testing;

[0025] In the figure: 1. Threaded connection part; 101. First cavity; 2. Collimation part; 201. Second cavity; 202. Mounting groove; 3. Protective pad; 301. Third cavity; 302. Mounting hole. Detailed Implementation

[0026] The technical solution of this application will now be clearly and completely described in conjunction with the accompanying drawings.

[0027] Please see Figure 1 and Figure 2 This application provides a technical solution:

[0028] A positioning nut for high-pressure oil pipe inspection includes a threaded connection portion 1. The diameter of a first cavity 101 is larger than the diameter of a second cavity 201. The thread of the threaded connection portion 1 is disposed within the first cavity 101. A collimating portion 2 is fixedly connected to one end of the threaded connection portion 1. The first cavity 101 is disposed inside the threaded connection portion 1, and the length of the first cavity 101 is not less than 23 mm, preferably 23 mm. The second cavity 201 is disposed inside the collimating portion 2, and the diameter of the second cavity 201 is 12.4 mm. The length of the second cavity 201 is not less than 37 mm, preferably 37 mm. Cavity 101 is connected to second cavity 201. Second cavity 201 is cylindrical. The difference between the diameter of second cavity 201 and the outer diameter of high-pressure oil pipe is no more than 0.4 mm. Preferably, the diameter of second cavity 201 is 12.4 mm. A protective pad 3 is fixedly connected to the end of collimation part 2 away from threaded connection part 1. The hardness of protective pad 3 is less than that of high-pressure oil pipe. Preferably, it is made of nylon. A cylindrical third cavity 301 is opened in the middle of protective pad 3. Third cavity 301 is connected to second cavity 201. The diameter of third cavity 301 is the same as that of second cavity 201.

[0029] When using this device, the end of a 12mm outer diameter high-pressure oil pipe is sequentially passed through the third cavity 301, the second cavity 201, and the first cavity 101 on one side of the protective pad 3, and then the high-pressure oil pipe is fixed on the detection device. The device is slid to align the threaded connection part 1 with the external bolt. By rotating the threaded connection part 1, the high-pressure oil pipe is connected to the external bolt. If the shape of the high-pressure oil pipe conforms to the standard, the axis of the high-pressure oil pipe end can coincide with the axis of the external bolt, and the device can smoothly connect the high-pressure oil pipe to the external bolt. If the shape of the high-pressure oil pipe does not conform to the standard, the axis of the high-pressure oil pipe end cannot coincide with the axis of the external bolt, and the threaded connection part 1 is difficult to fit onto the external bolt. The protective pad 3 at the end of the collimation part 2 prevents the end of the high-pressure oil pipe from being scratched.

[0030] like Figure 3As shown, the thickness of the protective pad 3 is not less than 5mm, preferably 5mm. The end of the third cavity 301 away from the second cavity 201 is flared to facilitate the user to insert the end of the high-pressure oil pipe into the third cavity 301.

[0031] In addition, the protective pad 3 has multiple mounting holes 302, and the collimating part 2 has multiple mounting grooves 202 near the end of the protective pad 3. The protective pad 3 and the collimating part 2 are fixed together by bolts, which makes it convenient for users to replace the protective pad 3.

[0032] Furthermore, the outer surface of the collimator 2 is prismatic, preferably a regular square prism, which makes it convenient for the user to hold the collimator 2 and rotate the device onto the external bolt.

Claims

1. A positioning nut for high pressure oil pipe detection, characterized by: The utility model provides a high pressure oil pipe protection device, including threaded connection (1), one end fixed connection has collimation part (2) of threaded connection (1), threaded connection (1) inside is equipped with first cavity (101), collimation part (2) inside is equipped with second cavity (201), first cavity (101) with second cavity (201) intercommunication, second cavity (201) is cylindrically arranged, the diameter of second cavity (201) with high pressure oil pipe outer diameter difference is not greater than 0.4mm, collimation part (2) is fixedly connected with protective pad (3) away from threaded connection (1) one end, the hardness of protective pad (3) is less than the hardness of high pressure oil pipe, the middle part of protective pad (3) is equipped with third cavity (301) of cylindrically, third cavity (301) with second cavity (201) intercommunication, third cavity (301) with the diameter of second cavity (201) is identical.

2. The positioning nut for high pressure oil pipe detection according to claim 1, characterized in that: The diameter of the first cavity (101) is greater than the diameter of the second cavity (201), and the threads of the threaded connection (1) are arranged in the first cavity (101).

3. The locating nut for high pressure oil pipe detection according to claim 1, characterized in that: The protective pad (3) is made of nylon material.

4. The locating nut for high pressure oil pipe detection according to claim 1, characterized in that: The diameter of the second cavity (201) is 12.4mm.

5. The locating nut for high pressure fuel pipe inspection according to claim 1, characterized in that: The length of the second cavity (201) is not less than 37mm.

6. The locating nut for high pressure fuel pipe inspection according to claim 1, characterized in that: The length of the first cavity (101) is not less than 23mm.

7. The locating nut for high pressure fuel pipe inspection according to claim 1, characterized in that: The thickness of the protective pad (3) is not less than 5mm, and the end of the third cavity (301) away from the second cavity (201) is arranged in an expanded mouth shape.

8. The locating nut for high pressure fuel pipe inspection according to claim 1, characterized in that: A plurality of mounting holes (302) are arranged on the protective pad (3), and a plurality of mounting grooves (202) are arranged on one end of the collimation part (2) close to the protective pad (3).

9. The locating nut for high pressure fuel pipe inspection according to claim 1, characterized in that: The outer surface of the collimation part (2) is arranged in a prismatic shape.

10. The locating nut for high pressure fuel pipe inspection according to claim 9, characterized in that: The outer surface of the collimation part (2) is a regular quadrangular prism.

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