High-pressure oil pipe

Abstract

The utility model provides a high-pressure oil pipe which comprises two inner pipes which are coaxially arranged, and expansion parts are connected to the two ends of the two inner pipes. The two sleeves symmetrically wrap the outer sides of the two inner pipes, a plurality of limiting rings are arranged on the outer side of any sleeve, and the length of any inner pipe is larger than that of any sleeve; the oil return connecting pipe is arranged between the two sleeves and arranged on the outer sides of the two sleeves in a sleeving mode, the two ends of the oil return connecting pipe are connected with limiting devices, and the limiting devices are connected with any limiting ring in a limiting mode; the pipe connecting nuts are arranged at the two ends of the two inner pipes and arranged on the outer sides of the expansion parts in a sleeving mode. According to the high-pressure oil pipe, the casing pipe is pulled, so that the positions of the casing pipe and the oil return connecting pipe are relatively changed, then the limiting ring on the outer side of the casing pipe is matched and fixed through the limiting device, and therefore the length of the oil pipe is adjusted, multiple oil pipes do not need to be carried during external work, and the trouble of cutting is omitted; the working efficiency is improved, the loss of the pipeline is avoided, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pipes, in particular to a high-pressure oil pipe. 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. High-pressure oil pipes mainly appear 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] Prior art patent No. 201921739958.7 discloses a double-layer protective high-pressure oil pipe whose two ends cannot be high. The high-pressure oil pipes on the left and right sides are provided with casings, and a return oil joint is provided on one end of the casing and a pipe nut is provided on the other end. The return oil joint is located between the high-pressure oil pipes on the left and right sides. A movable joint is provided on the return oil joint, and compression nuts are provided at both ends of the return oil joint. The return oil joint is located between the high-pressure oil pipes on the left and right sides, which effectively solves the problem that the position and height of the pipe joint nuts at both ends of the high-pressure oil pipe are restricted by installation requirements, ensures the oil return and monitoring of the high-pressure oil pipe, and ensures the safety of the use process.

[0004] However, in the above technology, it is inconvenient to adjust the length of the high-pressure oil pipe, so when using it, it is necessary to splice two oil pipes together according to the use length in order to achieve the transmission length of the oil pipe. If you work outside, you need to carry multiple oil pipes, which is inconvenient to carry. Sometimes you even need to cut the oil pipe. The process of cutting the oil pipe not only consumes a lot of time, but also causes certain losses, increasing costs. Utility Model Content

[0005] In view of the above problems, the utility model provides a high-pressure oil pipe.

[0006] A high-pressure oil pipe comprises: two inner pipes, which are coaxially arranged and connected with expansion parts at both ends of the two inner pipes; two sleeves, which are symmetrically covered on the outside of the two inner pipes, and a plurality of limit rings are provided on the outside of any sleeve, and the length of any inner pipe is greater than the length of any sleeve; an oil return pipe, which is arranged between the two sleeves and sleeved on the outside of the two sleeves, and a limit device is connected at both ends of the oil return pipe, and the limit device is limitedly connected with any limit ring; pipe nuts are arranged at both ends of the two inner pipes and sleeved on the outside of the expansion parts.

[0007] In a preferred embodiment, the high-pressure oil pipe further comprises: a telescopic bellows, which connects the two inner tubes.

[0008] In a preferred embodiment, the high-pressure oil pipe further includes: a first O-ring, which is arranged between the sleeve and the oil return pipe.

[0009] In a preferred embodiment, the high-pressure oil pipe further includes: a second O-ring disposed between the sleeve and the pipe union nut.

[0010] In a preferred embodiment, at least four limiting rings are provided on the outer side of any sleeve, and two adjacent limiting rings are arranged at equal distances.

[0011] In a preferred embodiment, the oil return pipe includes: a connecting pipe, which is arranged between the two sleeves and sleeved on the outside of the two sleeves; and an oil drain pipe, which is arranged on the connecting pipe and communicated with the connecting pipe.

[0012] In a preferred embodiment, the limiting device includes: a hinged portion; two semicircular ring plates connected to the hinged portion; a plurality of limiting protrusions arranged on the two semicircular ring plates and symmetrically arranged on both sides of the two semicircular ring plates; two bolt fixing plates, which are arranged in abutment and parallel to each other and are respectively fixedly connected to the two semicircular ring plates.

[0013] In a preferred embodiment, the limiting device further comprises: two pressure plates, which are integrally connected to one side of the two semicircular ring plates, have a circular cross-section, and are matched and connected to the oil return pipe.

[0014] The high-pressure oil pipe of the present application is adjusted by pulling the casing so that the positions of the casing and the oil return pipe are relatively changed, and then the limiting ring on the outside of the casing is matched and fixed by the limiting device, so as to complete the length adjustment of the oil pipe, so that when working outside, there is no need to carry multiple oil pipes, and the trouble of intercepting is saved, thereby improving work efficiency, avoiding the loss of pipelines, and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other characteristics, features and advantages of the present invention will become clear by reading the following description of the exemplary embodiments with reference to the accompanying drawings. The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 Result diagram of the high pressure oil pipe of the utility model;

[0017] Figure 2 A cross-sectional view of the high-pressure oil pipe state 1 of the utility model;

[0018] Figure 3 A cross-sectional view of the high-pressure oil pipe state 2 of the utility model;

[0019] Figure 4A cross-sectional view of state 1 of embodiment 2 of the high-pressure oil pipe of the utility model;

[0020] Figure 5 Structural diagram of state 2 of embodiment 2 of the high-pressure oil pipe of the utility model;

[0021] Figure 6 The structural diagram of the oil return pipe of the utility model;

[0022] Figure 7 The front view of the limit device of the utility model;

[0023] Figure 8 A side view of the position limiting device of the utility model.

[0024] In the figure: 10, inner tube; 11, expansion part; 20, sleeve; 21, limit ring; 30, oil return pipe; 40, limit device; 50, pipe nut; 12, telescopic bellows; 22, first O-ring; 23, second O-ring; 31, connecting pipe; 32, oil drain pipe; 41, hinged part; 42, semicircular ring plate; 43, limit protrusion; 44, bolt fixing plate; 45, pressure plate. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0026] The high-pressure oil pipe is described in detail below in conjunction with the accompanying drawings and embodiments. Example

[0027] A high-pressure oil pipe comprises: two inner tubes 10, the two inner tubes 10 are coaxially arranged, and expanded parts 11 are connected at both ends of the two inner tubes 10; two sleeves 20, the two sleeves 20 are symmetrically covered on the outside of the two inner tubes 10, and a plurality of limit rings 21 are opened on the outside of any sleeve 20, and the length of any inner tube 10 is greater than the length of any sleeve 20; an oil return pipe 30, which is arranged between the two sleeves 20 and sleeved on the outside of the two sleeves 20, and a limit device 40 is connected at both ends of the oil return pipe 30, and the limit device 40 is limitedly connected to any limit ring 21; a pipe joint nut 50, which is arranged at both ends of the two inner tubes 10 and sleeved on the outside of the expanded part 11.

[0028] When working, the sleeve 20 is pulled out, so that the positions of the sleeve 20 and the oil return pipe 30 are relatively changed, and then the limiting ring 21 outside the sleeve 20 is matched and fixed by the limiting device 40, so as to complete the adjustment of the length of the oil pipe. When working outside, there is no need to carry multiple oil pipes, and the trouble of interception is saved, which improves work efficiency, avoids the loss of pipelines, and saves costs.

[0029] Specifically, in a preferred embodiment, at least four limiting rings 21 are provided on the outer side of any sleeve 20 , and two adjacent limiting rings 21 are arranged at equal distances.

[0030] Specifically, in a preferred embodiment, the oil return pipe 30 includes: a connecting pipe 31 disposed between the two sleeves 20 and sleeved on the outside of the two sleeves 20; and an oil drain pipe 32 disposed on the connecting pipe 31 and connected to the connecting pipe 31.

[0031] When the sleeve 20 is pulled out, the inner tube 10 moves together with the sleeve 20 .

[0032] When penetration occurs, the penetrated high-pressure oil and gas will be discharged through the oil return pipe 30 . Example

[0033] Embodiment 2 is an improvement on Embodiment 1. Specifically, the high-pressure oil pipe further includes a telescopic bellows 12 , and the telescopic bellows 12 connects the two inner tubes 10 .

[0034] By adding the telescopic bellows 12 , when adjusting the length of the high-pressure oil pipe, the two inner pipes 10 can be directly connected and will not flow into the oil return pipe 30 . Example

[0035] Embodiment 3 is a specific limitation of Embodiment 1. Specifically, the high-pressure oil pipe further includes a first O-ring 22 disposed between the sleeve 20 and the oil return pipe 30 . Example

[0036] Embodiment 4 is a specific limitation of Embodiment 1. Specifically, the high-pressure oil pipe further includes a second O-ring 23 disposed between the sleeve 20 and the pipe union nut 50 . Example

[0037] Embodiment 5 is a specific limitation of Embodiment 1. Specifically, the limiting device 40 includes: a hinged portion 41; two semicircular ring plates 42, connected to the hinged portion 41; a plurality of limiting protrusions 43, arranged on the two semicircular ring plates 42, and symmetrically arranged on both sides of the two semicircular ring plates 42; two bolt fixing plates 44, which are arranged in abutment and parallel, and are respectively fixedly connected to the two semicircular ring plates 42. Example

[0038] Embodiment 6 is a specific limitation of Embodiment 1. Specifically, the limiting device 40 further includes two pressure plates 45 , which are integrally connected to one side of the two semicircular ring plates 42 , have a circular cross-section, and are matched and connected with the oil return pipe 30 .

[0039] Among them, by providing the pressing plate 45 , when installing the limiting device 40 , the pressing plate 45 is installed in a matching manner with the groove provided in the oil return pipe 30 , so that the installation can be more secure and stable.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "includes..." do not exclude the existence of other identical elements in the article or device including the elements.

[0041] The above embodiments are only used to illustrate the technical solution of the utility model but not to limit it. The utility model is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, and all should be included in the scope of the claims of the utility model.

Claims

1. A high-pressure oil pipe, characterized in that: include: Two inner tubes (10), the two inner tubes (10) are coaxially arranged, and expansion portions (11) are connected at both ends of the two inner tubes (10); Two sleeves (20), the two sleeves (20) symmetrically covering the outside of the two inner tubes (10), and a plurality of limit rings (21) are provided on the outside of any one of the sleeves (20), and the length of any one of the inner tubes (10) is greater than the length of any one of the sleeves (20); An oil return pipe (30) is arranged between the two sleeves (20) and sleeved on the outside of the two sleeves (20); limiting devices (40) are connected to both ends of the oil return pipe (30); the limiting devices (40) are connected to any one of the limiting rings (21) in a limiting manner; The pipe union nuts (50) are arranged at both ends of the two inner pipes (10) and sleeved on the outside of the expanded portion (11).

2. The high-pressure oil pipe according to claim 1, characterized in that: The high-pressure oil pipe also includes: A telescopic bellows (12), wherein the telescopic bellows (12) connects the two inner tubes (10).

3. The high-pressure oil pipe according to claim 1, characterized in that: The high-pressure oil pipe also includes: A first O-ring (22) is arranged between the sleeve (20) and the oil return pipe (30).

4. The high-pressure oil pipe according to claim 1, characterized in that: The high-pressure oil pipe also includes: A second O-ring (23) is arranged between the sleeve (20) and the pipe union nut (50).

5. The high-pressure oil pipe according to claim 1, characterized in that: At least four limiting rings (21) are provided on the outside of any one of the sleeves (20), and two adjacent limiting rings (21) are arranged at equal distances.

6. The high-pressure oil pipe according to claim 1, characterized in that: The oil return pipe (30) comprises: A connecting pipe (31) is arranged between the two sleeves (20) and sleeved on the outside of the two sleeves (20); An oil drain pipe (32) is arranged on the connecting pipe (31) and is in communication with the connecting pipe (31).

7. The high-pressure oil pipe according to claim 1, characterized in that: The limiting device (40) comprises: A hinge portion (41); Two semicircular ring plates (42) connected to the hinged portion (41); A plurality of limiting protrusions (43) are arranged on the two semicircular ring plates (42) and are symmetrically arranged on both sides of the two semicircular ring plates (42); The two bolt fixing plates (44) are arranged in parallel and in abutment with each other, and are respectively fixedly connected to the two semicircular ring plates (42).

8. The high-pressure oil pipe according to claim 7, characterized in that: The limiting device (40) further comprises: The two pressing plates (45) are integrally connected to one side of the two semicircular ring plates (42), have a circular cross-section, and are matched and connected to the oil return pipe (30).

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