High-pressure oil pipe end structure capable of reducing vibration bending stress

Abstract

The utility model relates to a pipe end structure of an oil pipe, in particular to a pipe end structure of a high-pressure oil pipe capable of reducing vibration bending stress, which comprises a connecting nut, an anti-vibration pad and a compression nut, the connecting nut is provided with a through cavity, and the pipe end of the high-pressure oil pipe extends into the cavity; the anti-vibration pad is arranged in the cavity and surrounds the pipe end of the high-pressure oil pipe by a circle. The compression nut is connected to one end of the connecting nut, and the pipe end of the high-pressure oil pipe penetrates through the compression nut. According to the high-pressure oil pipe end structure capable of reducing the vibration bending stress, the vibration bending stress of the high-pressure oil pipe can be effectively reduced, and the service life of the high-pressure oil pipe is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe end structure of oil pipe, especially to a high-pressure oil pipe pipe end structure capable of reducing vibration bending stress. BACKGROUND

[0002] Due to the installation environment in the engine, the high-pressure oil pipe generally adopts the type with high bending elasticity. In the use process, the vibration generated by the engine will generate a large bending stress at the root of the high-pressure oil pipe, which is easy to cause the root of the high-pressure oil pipe to break. Based on this, the Chinese utility model patent with publication number CN206468469U discloses a high-pressure oil pipe joint, which reduces the damage to the high-pressure oil pipe caused by vibration by increasing the gasket. However, when the first straight segment of the high-pressure oil pipe is long, the gasket with a small axial length in the above-mentioned patent cannot effectively reduce the vibration.

[0003] Therefore, it is necessary to improve the pipe end structure of the high-pressure oil pipe to reduce the influence of the bending stress generated by the vibration on the service life of the oil pipe. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the deficiencies in the prior art, the utility model provides a high-pressure oil pipe pipe end structure capable of reducing vibration bending stress.

[0005] In order to achieve the above-mentioned purpose, the utility model discloses a high-pressure oil pipe pipe end structure capable of reducing vibration bending stress, which comprises:

[0006] A connecting nut is provided with a through cavity, and the high-pressure oil pipe pipe end extends into the cavity;

[0007] A vibration reduction pad is arranged in the cavity and surrounds the high-pressure oil pipe pipe end;

[0008] A compression nut is connected to one end of the connecting nut, and the high-pressure oil pipe pipe end passes through the compression nut;

[0009] A gasket is arranged between the connecting nut and the compression nut.

[0010] Preferably, a flange is arranged in the connecting nut, which divides the cavity into a first cavity and a second cavity, the vibration reduction pad is arranged in the first cavity, and the high-pressure oil pipe pipe end is divided into a diameter segment and a upsetting head type, wherein the diameter segment extends into the first cavity, and the upsetting head type extends into the second cavity.

[0011] Preferably, the two ends of the connecting nut are respectively provided with internal threads and external threads, the internal threads are arranged on the inner wall of the second cavity, and the external threads are arranged on the end of the connecting nut connected with the compression nut.

[0012] Preferably, the outer wall of the damping pad is provided with at least one ring of protrusions.

[0013] Preferably, the at least one ring of protrusions is arranged along an axial direction thereof.

[0014] Preferably, the damping pad is provided with a through hole for the high-pressure oil pipe end to pass through, and the through hole is provided with counter-sunk holes at both ends thereof.

[0015] Preferably, the damping pad is made of rubber.

[0016] The utility model has the following technical effects:

[0017] The damping pad is added at the high-pressure oil pipe end structure, the damping pad tightly holds the high-pressure oil pipe end, thereby supporting and damping the high-pressure oil pipe, effectively reducing the vibration bending stress of the high-pressure oil pipe, and prolonging the service life of the high-pressure oil pipe. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model is a structural schematic view;

[0019] Figure 2 The utility model is a structural schematic view of the connecting nut;

[0020] Figure 3 The utility model is a structural schematic view of the damping pad;

[0021] Figure 4 The utility model is a structural schematic view of the high-pressure oil pipe end.

[0022] In the drawings, 1 is a connecting nut; 2 is a chamber; 3 is a high-pressure oil pipe end; 4 is a damping pad; 5 is a compression nut; 6 is a gasket; 7 is a flange; 8 is a diameter section; 9 is a upset head type; 10 is a protrusion; 11 is a through hole; 12 is a counter-sunk hole; 13 is a second chamber; 14 is a first chamber. DETAILED DESCRIPTION

[0023] The principles and features of the utility model are described below in combination with embodiments; the examples are only used to explain the utility model; and are not used to limit the scope of the utility model.

[0024] A high-pressure oil pipe end structure for reducing vibration bending stress comprises a connecting nut 1, a damping pad 4, a compression nut 5 and a gasket 6.

[0025] The high-pressure oil pipe end structure is shown in the attached Figure 4 The structure is generally divided into two parts, namely a diameter section 8 and a upset head type 9, wherein the diameter section 8 is a tubular body, and the upset head type 9 can be any existing shape; generally, the cross section of the upset head type 9 is larger than that of the diameter section 8.

[0026] The structure of the connecting nut 1 is shown in the attached Figure 2 The connecting nut 1 is cylindrical. The connecting nut 1 has a through cavity 2, and a flange 7 extending inwardly is arranged in the cavity 2, which divides the cavity 2 into a first cavity 14 and a second cavity 13. The damping pad 14 is installed in the first cavity 14, so the inner diameter of the first cavity 14 is larger than that of the second cavity 13. The damping pad 14 is made of rubber, and the bottom end surface of the damping pad 14 is in close contact with the upper surface of the flange 7. The diameter section 8 of the high-pressure oil pipe end 3 passes through the first cavity 14, and the upset head type 9 of the high-pressure oil pipe end 3 extends into the second cavity 13. The intersection surface of the upset head type 9 and the diameter section 8 is clamped on the lower surface of the flange 7. The inner thread is arranged on the inner wall of the second cavity 13, and the outer thread is arranged on the other end of the connecting nut 1.

[0027] The structure of the damping pad 4 is shown in the attached Figure 3 The damping pad 4 is made of rubber. Specifically, the damping pad 4 is cylindrical, and the protrusions 10 are arranged on the outer surface of the damping pad 4. The protrusions 10 are arranged in the axial direction of the damping pad 4. The through hole 11 is arranged at the center of the damping pad 4, and the counterbore 12 is arranged at both ends of the through hole 11, which can avoid the rubber flash of the damping pad 4 during the pressing process. The diameter section 8 of the high-pressure oil pipe end 3 passes through the through hole 11 of the damping pad 4. The damping pad 4 arranged around the diameter section 8 can support and damp the high-pressure oil pipe, thereby effectively reducing the vibration bending stress of the high-pressure oil pipe 6.

[0028] The pressing nut 5 is connected to the end of the connecting nut 1 provided with the outer thread. The pressing nut 5 is screwed with the connecting nut 1 to fix the damping pad 4 in the first cavity 14. The gasket 6 is arranged between the connecting nut 1 and the pressing nut 5, which can avoid the direct contact between the pressing nut 5 and the damping pad 4, and avoid damaging the damping pad 4 due to the friction.

[0029] The above is only a preferred embodiment of the present application; it is not used to limit the present application; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high-pressure oil pipe end structure for reducing vibration bending stress, characterized in that, The utility model relates to a high-pressure oil pipe connecting nut, comprising: a connecting nut (1) having a through cavity (2) into which a high-pressure oil pipe end (3) extends; a damping pad (4) arranged in the cavity (2) and surrounding the high-pressure oil pipe end (3); a compression nut (5) connected to one end of the connecting nut (1) through which the high-pressure oil pipe end (3) extends; a gasket (6) arranged between the connecting nut (1) and the compression nut (5).

2. The high-pressure oil pipe end structure that reduces a vibration bending stress according to claim 1, characterized by, The connecting nut (1) is provided with a flange (7) that divides the cavity (2) into a first cavity (14) and a second cavity (13), the damping pad (4) is arranged in the first cavity (14), and the high-pressure oil pipe end (3) is divided into a diameter section (8) extending into the first cavity (14) and a upsetting head type (9) extending into the second cavity (13).

3. The high-pressure oil pipe end structure that reduces a vibration bending stress according to claim 2, characterized by, The two ends of the connecting nut (1) are respectively provided with internal threads and external threads, the internal threads are arranged on the inner wall of the second cavity (13), and the external threads are arranged on the end of the connecting nut (1) connected to the compression nut (5).

4. The high pressure oil pipe end structure which reduces a vibration bending stress according to claim 1, characterized by The outer wall of the damping pad (4) is provided with at least one ring of protrusions (10).

5. The high pressure oil pipe end structure which reduces a vibration bending stress according to claim 4, characterized by The at least one ring of protrusions (10) is arranged in an axial direction.

6. The high pressure oil pipe end structure which reduces a vibration bending stress according to claim 1, characterized by The damping pad (4) is provided with a through hole (11) through which the high-pressure oil pipe end (3) extends, and the two ends of the through hole (11) are provided with countersunk holes (12).

7. The high pressure oil pipe end structure which reduces a vibration bending stress according to claim 1, characterized by The damping pad (4) is made of rubber.

Images