A composite structure high pressure oil pipe

Abstract

The present invention relates to the technical field of high-pressure oil pipes, specifically to a composite structure high-pressure oil pipe, including a double-layer oil pipe and two joints, the double-layer oil pipe includes an inner oil pipe and an outer casing, both ends of the inner oil pipe are provided with swaging heads, the swaging heads are arranged in the joints, the outer casing is sleeved on the inner oil pipe, both ends of the outer casing are sleeved on the two joints respectively, the outer casing is a high-pressure steel wire braided rubber hose, the outer casing is clamped on the joint by a clamp sleeved on the outer casing, and a filling space is preset between the outer casing and the inner oil pipe. By setting a filling space between the inner oil pipe and the outer casing, and filling the filling space with materials with different properties, a high-pressure oil pipe suitable for different environments can be obtained.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure oil pipes, in particular to a high-pressure oil pipe with a composite structure. Background Art

[0002] High-pressure oil pipes are components of high-pressure oil circuits. They are required to withstand a certain oil pressure and have a certain fatigue strength to ensure the sealing requirements of the pipelines. Automotive high-pressure oil pipes are mainly found in high-pressure injection diesel engines and high-pressure injection direct injection gasoline engines, and can withstand the oil pressure required during engine operation.

[0003] The existing high-pressure oil pipe consists of a pipe body and two joints. It is an important part of the high-pressure volume of the diesel engine and the injection system. The pressure of the high-pressure oil pipe fluctuates periodically during operation, causing mechanical vibration of the high-pressure oil pipe during use. Long-term fatigue work can easily lead to loose joints and oil leakage. At the same time, the structure of the existing high-pressure oil pipe is simple, and it is difficult to improve the high-pressure oil pipe so that it can be suitable for use in different environments. Summary of the invention

[0004] The purpose of the present invention is to provide a composite structure high-pressure oil pipe to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A composite structure high-pressure oil pipe described in the present invention comprises a double-layer oil pipe and two joints, wherein the double-layer oil pipe comprises an inner layer oil pipe and an outer layer casing, both ends of the inner layer oil pipe are provided with upsetting heads, the upsetting heads are arranged in the joints, the outer layer casing is sleeved on the inner layer oil pipe, and both ends of the outer layer casing are sleeved on the two joints respectively, the outer layer casing is a high-pressure steel wire braided rubber hose, the outer layer casing is clamped on the joint by a clamp sleeved on the outer layer casing, and a filling space is preset between the outer layer casing and the inner layer oil pipe; the filling space is filled with The filler is provided with two through holes on the outer casing, and a charging valve and a discharging valve are respectively fixedly installed on the two through holes. When working, the discharging valve is connected to the return oil tank of the diesel engine through a hose and a filter. When oil leakage occurs, the leaked oil flows back to the return oil tank of the diesel engine through the discharging valve, and the leaked oil is collected. A pressure alarm is arranged on the outer casing. When oil leakage occurs, the leaked oil enters the outer casing, and the pressure in the outer casing increases, triggering the pressure alarm to sound an alarm, reminding personnel that oil leakage occurs in the high-pressure oil pipe.

[0007] Preferably, the outer wall of the inner oil pipe is provided with spiral patterns, and the filler is composed of a plurality of spherical particles, and the filler can roll between the spiral patterns provided on the outer wall of the inner oil pipe.

[0008] Preferably, the filler consists of a number of spherical calcium carbonate products.

[0009] Preferably, the filler consists of a number of spherical iron sands.

[0010] Preferably, the filler is cooling oil.

[0011] Preferably, the inner oil pipe is a rigid oil pipe, and the material of the inner oil pipe is 30CrMo.

[0012] Compared with the prior art, the beneficial effect of the present invention is that a composite structure high-pressure oil pipe described in the present invention can obtain a high-pressure oil pipe suitable for different environments by setting a filling space between the inner oil pipe and the outer casing and filling the filling space with materials with different properties.

[0013] 1. By using calcium carbonate products with high compressive strength, low thermal conductivity, and convenient production and processing, it can effectively achieve thermal insulation effect, thereby achieving thermal insulation effect on the inner layer of the oil pipe, and is suitable for use in low temperature environments.

[0014] 2. By using spherical iron sand as filler, part of the energy generated by vibration can be absorbed by the spherical iron sand and converted into work done by friction between the spherical iron sand, thereby reducing the vibration amplitude and avoiding loose joints and oil leakage caused by mechanical vibration; when leakage occurs, by setting spherical calcium carbonate or spherical iron sand and other fillers between the outer casing and the inner oil pipe, the flow area of ​​the leaking oil between the outer casing and the inner oil pipe will be reduced, which has a certain sealing effect and can reduce the leakage rate of high-pressure oil.

[0015] 3. By using cooling oil as the filler, the cooling oil is continuously filled into the filling space through the filling valve, so that the cooling oil absorbs the temperature of the inner oil pipe and is discharged through the discharge valve, thereby reducing the temperature of the inner oil pipe, which is suitable for use in high temperature environment.

[0016] 4. The use of 30CrMo strengthens the overall strength of the inner layer of the oil pipe, making the oil pipe less likely to break. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 for Figure 1 A partial enlarged view of point A in the figure.

[0019] In the figure: joint 1, inner oil pipe 2, spiral pattern 21, outer casing 3, clamp 4, filling space 5, filling material 6, charging valve 7, discharge valve 8, pressure alarm 9. Specific embodiments

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1

[0022] See also Figure 1 A composite structure high-pressure oil pipe of the present invention comprises a double-layer oil pipe and two joints 1. The double-layer oil pipe comprises an inner oil pipe 2 and an outer casing 3. Both ends of the inner oil pipe 2 are provided with upsetting heads, which are arranged in the joint 1. The outer casing 3 is sleeved on the inner oil pipe 2. Both ends of the outer casing 3 are sleeved on the two joints 1 respectively. The outer casing 3 is a high-pressure steel wire braided rubber hose. The outer casing 3 is clamped on the joint 1 by a clamp 4 sleeved on the outer casing 3. A filling space 5 is preset between the outer casing 3 and the inner oil pipe 2; the filling space 5 is filled with a filler 6. Two through holes are provided on the outer casing 3. A charging valve 7 and a discharge valve 8 are fixedly installed on the two through holes respectively. When working, the discharge valve 8 is connected to the return oil tank of the diesel engine through a hose and a filter. When oil leakage occurs, the leaked oil flows back to the return oil tank of the diesel engine through the discharge valve 8. In the oil tank; a pressure alarm 9 is arranged on the outer casing 3. When oil leakage occurs, the leaked oil enters the outer casing 3, and the pressure in the outer casing 3 increases, triggering the pressure alarm 9 to sound an alarm, reminding personnel that the high-pressure oil pipe is leaking. A spiral pattern 21 is arranged on the outer wall of the inner oil pipe 2, and the filler 6 is composed of a plurality of spherical particles. The filler 6 can roll between the spiral patterns 21 arranged on the outer wall of the inner oil pipe 2. The filler 6 is composed of a plurality of spherical calcium carbonate products. The spherical calcium carbonate products can be filled through the filling valve 7 and roll along the spiral patterns 21 arranged on the outer wall of the inner oil pipe 2 until the filling space 5 is filled. The calcium carbonate product has high compressive strength and low thermal conductivity, is easy to produce and process, can effectively achieve a heat insulation effect, and then achieve a heat preservation effect on the inner oil pipe 2, and is suitable for use in a low temperature environment.

[0023] Example 2

[0024] See also Figure 1The present invention discloses a composite structure high-pressure oil pipe, comprising a double-layer oil pipe and two joints 1, wherein the double-layer oil pipe comprises an inner oil pipe 2 and an outer casing 3, wherein both ends of the inner oil pipe 2 are provided with upsetting heads, which are arranged in the joint 1, and the outer casing 3 is sleeved on the inner oil pipe 2, and both ends of the outer casing 3 are sleeved on the two joints 1 respectively, and the outer casing 3 is a high-pressure steel wire braided rubber hose, and the outer casing 3 is clamped on the joint 1 by a clamp 4 sleeved on the outer casing 3, and a filling space 5 is preset between the outer casing 3 and the inner oil pipe 2; the filling space 5 is filled with a filler 6, and two through holes are provided on the outer casing 3, and a charging valve 7 and a discharge valve 8 are respectively fixedly installed on the two through holes, and when working, the discharge valve 8 is connected to the diesel through a hose and a filter. In the return oil tank of the diesel engine, when oil leakage occurs, the leaked oil flows back to the return oil tank of the diesel engine through the discharge valve 8; a pressure alarm 9 is arranged on the outer casing 3, and when oil leakage occurs, the leaked oil enters the outer casing 3, and the pressure in the outer casing 3 increases, triggering the pressure alarm 9 to sound an alarm, reminding personnel that the high-pressure oil pipe is leaking, and the filler 6 is composed of a certain number of spherical iron sands; spherical iron sands are filled into the filling space 5 through the filling valve 7, and the pressure of the high-pressure oil pipe during operation fluctuates periodically, causing the high-pressure oil pipe to vibrate. At this time, part of the energy generated by the vibration will be absorbed by the spherical iron sands and converted into friction between the spherical iron sands to do work, thereby reducing the vibration amplitude and avoiding the loosening and oil leakage of the joint 1 caused by mechanical vibration.

[0025] Example 3

[0026] See also Figure 1 The present invention discloses a composite structure high-pressure oil pipe, comprising a double-layer oil pipe and two joints 1. The double-layer oil pipe comprises an inner oil pipe 2 and an outer casing 3. Both ends of the inner oil pipe 2 are provided with upsetting heads, which are arranged in the joint 1. The outer casing 3 is sleeved on the inner oil pipe 2. Both ends of the outer casing 3 are sleeved on the two joints 1 respectively. The outer casing 3 is a high-pressure steel wire braided rubber hose. The outer casing 3 is clamped on the joint 1 by a clamp 4 sleeved on the outer casing 3. A filling space 5 is preset between the outer casing 3 and the inner oil pipe 2; the filling space 5 is filled with a filler 6, and the outer casing 3 is a high-pressure steel wire braided rubber hose. The outer casing 3 is clamped on the joint 1 by a clamp 4 sleeved on the outer casing 3. A filling space 5 is preset between the outer casing 3 and the inner oil pipe 2; the filling space 5 is filled with a filler 6, and the outer casing 3 is a high-pressure steel wire braided rubber hose. There are two through holes on the sleeve 3, and a charging valve 7 and a discharge valve 8 are fixedly installed on the two through holes respectively. The filler 6 is cooling oil. The cooling oil is continuously filled into the filling space 5 through the charging valve 7, so that the cooling oil absorbs the temperature of the inner oil pipe 2 and is discharged through the discharge valve 8, thereby reducing the temperature of the inner oil pipe 2. It is suitable for use in high temperature environments. A pressure alarm 9 is provided on the outer sleeve 3. When oil leakage occurs, the leaked oil enters the cooling oil, and the pressure in the outer pipe sleeve 3 increases, triggering the pressure alarm 9 to sound an alarm, reminding personnel that there is an oil leakage in the high-pressure oil pipe.

[0027] Example 4

[0028] See also Figure 1A composite structure high-pressure oil pipe of the present invention comprises a double-layer oil pipe and two joints 1. The double-layer oil pipe comprises an inner oil pipe 2 and an outer casing 3. Both ends of the inner oil pipe 2 are provided with upsetting heads, which are arranged in the joint 1. The outer casing 3 is sleeved on the inner oil pipe 2. Both ends of the outer casing 3 are sleeved on the two joints 1 respectively. The outer casing 3 is a high-pressure steel wire braided rubber hose. The outer casing 3 is clamped on the joint 1 by a clamp 4 sleeved on the outer casing 3. A filling space 5 is preset between the outer casing 3 and the inner oil pipe 2; the filling space 5 is filled with a filler 6. Two through holes are provided on the outer casing 3. The two through holes are provided with a filler 6. A charging valve 7 and a discharge valve 8 are fixedly installed respectively. When working, the discharge valve 8 is connected to the return tank of the diesel engine through a hose and a filter. When oil leakage occurs, the leaked oil flows back to the return tank of the diesel engine through the discharge valve 8; a pressure alarm 9 is arranged on the outer casing 3. When oil leakage occurs, the leaked oil enters the cooling oil, and the pressure in the outer casing 3 increases, triggering the pressure alarm 9 to sound an alarm, reminding personnel that the high-pressure oil pipe is leaking. The inner oil pipe 2 is a rigid oil pipe. The material of the inner oil pipe 2 is 30CrMo. The use of 30CrMo strengthens the overall strength of the main body of the inner oil pipe 2, making the oil pipe not easy to rupture.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite structure high-pressure oil pipe, comprising a double-layer oil pipe and two joints (1), characterized in that: The double-layer oil pipe comprises an inner oil pipe (2) and an outer casing (3). Both ends of the inner oil pipe (2) are provided with swaging heads, which are arranged in a joint (1). The outer casing (3) is sleeved on the inner oil pipe (2). Both ends of the outer casing (3) are sleeved on two joints (1) respectively. The outer casing (3) is a high-pressure steel wire braided rubber hose. The outer casing (3) is clamped on the joint (1) by a clamp (4) sleeved on the outer casing (3). A filling space (5) is preset between the outer casing (3) and the inner oil pipe (2); the filling space (5) is filled with a filler (6). Two through holes are opened on the outer casing (3), and a charging valve (7) and a discharge valve (8) are fixedly installed on the two through holes respectively. A pressure alarm (9) is arranged on the outer casing (3); The outer wall of the inner oil pipe (2) is provided with a spiral pattern (21), and the filler (6) is composed of a plurality of spherical particles, and the filler (6) can roll between the spiral patterns (21) provided on the outer wall of the inner oil pipe (2); The filler (6) is composed of a number of spherical calcium carbonate products; The filler (6) is composed of a number of spherical iron sands.

2. The composite structure high-pressure oil pipe according to claim 1, characterized in that: The filler (6) is cooling oil.

3. The composite structure high pressure oil pipe according to claim 1, characterized in that: The inner layer oil pipe (2) is a rigid oil pipe, and the material of the inner layer oil pipe (2) is 30CrMo.

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