CN219734515U - High-pressure oil pipe - Google Patents

Abstract

The utility model discloses a high-pressure oil pipe, which comprises a sheath, a pipe body and a pipe joint nut, wherein a through hole is formed in the body of the pipe joint nut, the pipe body penetrates through the through hole, pier heads are arranged at two ends of the pipe body, the pipe body penetrates through the sheath, the sheath is positioned between the pier heads and the body of the pipe joint nut, a cavity for accommodating the sheath is formed in the body of the pipe joint nut, the length of the cavity is larger than that of the sheath, the cavity is communicated with the through hole, a diversion trench is formed in the body of the pipe joint nut, and the diversion trench is communicated with the through hole and the cavity. The pipe joint nut structure of the high-pressure oil pipe is optimized, a channel which is convenient for high-pressure medium to flow is formed, the high-pressure medium can be guided to flow in the disassembling process, and the high-pressure medium is thoroughly prevented from splashing and scattering from the loose connecting part between the pipe joint nut and the tool.

Description

High-pressure oil pipe

Technical Field

The utility model relates to a high-pressure oil pipe.

Background

The high pressure fuel line is an important passage for transporting fuel on the engine, and the inside of the high pressure fuel line needs to bear higher pressure. The high-pressure oil pipe is required to undergo compression test in the production stage, the high-pressure oil pipe is arranged on a tool for simulating an engine, a high-pressure medium is introduced, and the good products can be considered after no liquid leakage is observed; and later, the packaging process is carried out after the packaging process is disassembled. The high-pressure oil pipe comprises a pipe body and pipe joint nuts, pier structures are arranged at two ends of the pipe body, the pipe joint nuts are sleeved outside the pipe body, the pipe joint nuts are screwed during installation, and the pipe joint nuts are combined with interfaces on the tool through threads, so that the installation is completed. When the assembly personnel dismount the high-pressure oil pipe for measurement, the screw connection part of the pipe joint nut and the interface is unscrewed, and as the oil pressure inside the pipe body and the tool is not completely released, the high-pressure medium is scattered from the loose connection part between the pipe joint nut and the tool, and the splashing situation not only pollutes peripheral parts, but also hurts the assembly personnel, and a fire disaster is easy to occur.

Disclosure of Invention

The utility model aims to solve the technical problem of preventing high-pressure medium from splashing from a loose connection part between a pipe joint nut and a tool when a high-pressure oil pipe is disassembled.

In order to solve the technical problems, the utility model adopts the following technical scheme: the high-pressure oil pipe comprises a pipe body and a pipe joint nut, wherein a through hole is formed in the body of the pipe joint nut, the pipe body penetrates through the through hole, a pier head is arranged at two ends of the pipe body, the high-pressure oil pipe further comprises a sheath, the sheath is of a circular pipe-shaped structure, the pipe body penetrates through the sheath, the sheath is located between the pier head and the body of the pipe joint nut, a cavity for accommodating the sheath is formed in the body of the pipe joint nut, the length of the cavity is larger than that of the sheath, the cavity is communicated with the through hole, a step surface is formed in the body of the pipe joint nut, a diversion trench is formed in the body of the pipe joint nut, the diversion trench is located at one end of the sheath, the pier head is located at the other end of the sheath, the diversion trench is communicated with the through hole and the cavity, and the step surface is located towards the position where the sheath is located, and the depth of the diversion trench is larger than the thickness of the sheath.

The high-pressure oil pipe is also installed in place in a mode of screwing the pipe joint nut, and after the pipe joint nut is installed, the pipe joint nut is not directly connected with a pier head structure of the pipe body, but is connected with the pier head through a sheath; the pipe joint nut is propped against the sheath, and the sheath is propped against the pier head. The sheath just pushes up on the step face when extrudeing each other between tube coupling nut and the sheath, because the degree of depth of guiding gutter is greater than the thickness of sheath for the guiding gutter all communicates with the cavity at any time, again because the through-hole is not filled up by the body, through-hole and guiding gutter intercommunication, through-hole and external intercommunication, so the cavity is all the time with external intercommunication, has formed the passageway that is convenient for high-pressure medium flow between cavity, guiding gutter, through-hole. When the high-pressure oil pipe is disassembled, the high-pressure medium overflowed from the pier head is gathered in the cavity, flows through the diversion trench and the through hole and finally flows to one end of the pipe joint nut. The high pressure medium flows out of the channel, thereby inhibiting the high pressure medium from overflowing from the loose area between the interface of the pipe joint nut and the tooling.

The structure of the diversion trench is preferably that the extending direction of the diversion trench is parallel to the extending direction of the through hole, the length of the diversion trench is smaller than that of the through hole, and the diversion trench forms an opening in two perpendicular directions. That is, the guide groove is not exposed at the end of the pipe joint nut, and the structure has the advantages that one end of the guide groove is communicated with the through hole, the range of the high-pressure medium flowing channel is enlarged through the through hole, the cross section of the channel is increased, the high-pressure medium flowing speed is reduced, and the high-pressure medium flows out orderly in a slow mode.

For further controlling the orderly outflow process of the high-pressure medium, the pipe joint nut is provided with a guide section, the guide section is positioned at one end of the body and is connected with the body into a whole, and the length of the guide section is smaller than that of the body. Therefore, the high-pressure medium can be guided to a region far away from the interface connection of the pipe joint nut and the tool, and the harm of high-pressure mind overflowing is further reduced.

In order to facilitate the additional installation of high-pressure medium collecting members, such as recovery bags, outside the guide section, an annular groove is provided outside the guide section. When in use, the recovery bag is only required to be sleeved outside the pipe body and bound in the annular groove. The overflowed high-pressure medium is shot on the recovery bag, and the recovery bag is fixed at the annular groove, so that the recovery bag is not easy to separate from the high-pressure oil pipe.

The utility model adopts the technical scheme that: the pipe joint nut structure of the high-pressure oil pipe is optimized, a channel which is convenient for high-pressure medium to flow is formed, the high-pressure medium can be guided to flow in the disassembling process, and the high-pressure medium is thoroughly prevented from splashing and scattering from the loose connecting part between the pipe joint nut and the tool.

Drawings

The utility model is described in further detail below with reference to the drawings and the detailed description.

FIG. 1 is a schematic view of a high pressure oil pipe according to the present utility model;

FIG. 2 is a schematic diagram illustrating the assembly of a union nut, a pipe body and a sheath for a high pressure oil pipe according to the present utility model;

fig. 3 is a schematic structural view of a union nut of a high-pressure oil pipe according to the present utility model.

Detailed Description

As shown in fig. 1, 2 and 3, the high-pressure oil pipe comprises a pipe body 1, a pipe joint nut 2 and a sheath 9. Pier heads 10 are arranged at two ends of the pipe body 1. Both the union nut 2 and the sheath 9 are sleeved on the union nut 2. The pipe joint nut 2 is provided with two parts, one is a body 3 and the other is a guide section 7, the guide section 7 is positioned at one end of the body 3, the guide section 7 is connected with the body 3 into a whole, and the length of the guide section 7 is smaller than that of the body 3. An annular groove 8 is arranged outside the guide section 7. The body 3 is provided with a through hole 5, the through hole 5 extending all the way to the guide section 7. The body 3 is internally provided with a cavity 4, and the cavity 4 is communicated with a through hole 5. The center line of the cavity 4 coincides with the center line of the through hole 5, the diameter of the cavity 4 is larger than the diameter of the through hole 5, and the length of the cavity 4 is larger than the length of the sheath 9. The inside of the body 3 is provided with a step surface, and the cavity 4 and the through hole 5 are in transition through the step surface. The sheath 9 has a circular tube structure. The tube body 1 passes through the through hole 5 and the sheath 9. A sheath 9 is located within the cavity 4 and between the union nut 2 and the pier head 10. The step faces towards the location of the sheath 9. The body 3 of the pipe joint nut 2 is also provided with a diversion trench 6. The guiding gutter 6 is located the one end of sheath 9, and pier nose 10 is located the other end of sheath 9. The extending direction of the flow guiding groove 6 is parallel to the extending direction of the through hole 5, the length of the flow guiding groove 6 is smaller than the length of the through hole 5, and the flow guiding groove 6 forms openings in two perpendicular directions. The diversion trench 6 is communicated with the through hole 5, and the diversion trench 6 is also communicated with the cavity 4. The depth of the diversion trench 6 is larger than the thickness of the sheath 9, so that the hollow cavity 4, the diversion trench 6 and the through hole 5 are always in a communicated state.

When the high-pressure oil pipe assembly device is used, the pipe joint nut 2 is butted to the interface of the tool, the pipe joint nut 2 is screwed on the interface of the tool, the pier head 10 is in sealing connection with the interface of the tool, and the high-pressure oil pipe assembly is completed. The pipe joint nut 2 is tightly pressed against the pier head 10 through the sheath 9, so that the pier head 10 is tightly combined with the tool. One end of the sheath 9 is pressed against the step surface and the other end is propped against the pier head 10. The sheath 9 does not cover the diversion trench 6, so the cavity 4 and the through hole 5 are continuously communicated through the diversion trench 6. When the high-pressure oil pipe is disassembled, the pipe joint nut 2 is unscrewed, the sealing connection between the pier head 10 and the interface of the tool is eliminated, and high-pressure medium overflowed from the interface of the pier head 10 and the tool enters the cavity and then flows outwards along the channel formed by the cavity, the diversion trench 6 and the through hole 5. In this way, the high-pressure medium can be effectively prevented from overflowing outwards from the gap at the thread between the pipe joint nut 2 and the interface of the tool.

Claims (4)

1. The utility model provides a high-pressure oil pipe, high-pressure oil pipe includes body (1) and union nut (2), body (3) of union nut (2) are equipped with through-hole (5), body (1) pass through-hole (5), body (1) both ends are equipped with pier nose (10), its characterized in that: the high-pressure oil pipe still includes sheath (9), sheath (9) are pipe column structure, sheath (9) are passed to body (1), sheath (9) are located between pier nose (10) and body (3) of union nut (2), the inside cavity (4) that are used for holding sheath (9) that are equipped with of body (3) of union nut (2), the length of cavity (4) is greater than the length of sheath (9), cavity (4) and through-hole (5) intercommunication, the inside step face that is equipped with of body (3) of union nut (2), the inside guiding gutter (6) that are equipped with of body (3) of union nut (2), guiding gutter (6) are located the one end of sheath (9), pier nose (10) are located the other end of sheath (9), guiding gutter (6) and through-hole (5) intercommunication, guiding gutter (6) also communicate with cavity (4), the depth that the depth of guiding gutter (6) is greater than sheath (9) is located.

2. The high pressure oil line of claim 1, wherein: the extending direction of the diversion trench (6) is parallel to the extending direction of the through hole (5), the length of the diversion trench (6) is smaller than that of the through hole (5), and the diversion trench (6) forms openings in two perpendicular directions.

3. The high pressure oil line of claim 1, wherein: the pipe joint nut (2) is provided with a guide section (7), the guide section (7) is positioned at one end of the body (3) and is connected with the body (3) into a whole, and the length of the guide section (7) is smaller than that of the body (3).

4. A high pressure oil line according to claim 3, wherein: an annular groove (8) is formed in the outer side of the guide section (7).