CN110030437B

CN110030437B - Buried pipeline

Info

Publication number: CN110030437B
Application number: CN201910321207.1A
Authority: CN
Inventors: 张子江
Original assignee: Ningbo Metallurgical Survey And Design Research Co ltd
Current assignee: Ningbo Metallurgical Survey And Design Research Co ltd
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2021-03-02
Anticipated expiration: 2039-04-19
Also published as: CN110030437A

Abstract

The invention relates to the technical field of pipelines, and particularly discloses a buried pipeline which comprises a plurality of sections of pipeline units which are mutually butted, wherein each pipeline unit comprises a pipe body (1), a conductive metal wire (3) along the length direction of the pipe body (1) is embedded in the pipe wall of the pipe body (1), an insertion end (12) and a connection end (13) are respectively arranged at two ends of the pipe body (1), a positioning structure is arranged between the insertion end (12) and the connection end (13), when two sections of pipeline units which are matched with each other are butted, the insertion end (12) of one pipeline unit is inserted into the connection end (13) of the other pipeline unit, the conductive metal wires (3) of two adjacent pipeline units are mutually contacted and butted through the positioning structure, and the continuous conductive metal wires (3) are arranged in the buried PE pipeline, so that the buried pipeline can be conveniently detected.

Description

Buried pipeline

Technical Field

The invention relates to the technical field of pipelines, in particular to a buried pipeline.

Background

Underground gas pipelines are important components of urban infrastructure and are life lines on which cities live and develop. With the development of science and technology, the material quality of urban gas pipelines is constantly changing, and in the past, metal pipelines are largely used, and because the gas PE pipelines have the advantages of strong pollution resistance, light weight, low manufacturing cost, corrosion resistance, easiness in burying and maintenance and the like, the gas PE pipelines are increasingly used for replacing metal pipelines at present.

The detection technology of underground gas metal pipelines tends to be mature, but the detection of the gas PE pipeline is still a technical problem at present, because the PE pipeline is non-conductive and non-magnetic, the common metal pipeline detection equipment cannot detect the gas PE pipeline, and the disaster caused by the unclear position of the underground gas PE pipeline is countless. How to rapidly, accurately and conveniently detect the buried gas PE pipeline becomes a problem to be solved urgently.

Disclosure of Invention

The invention aims to provide a PE pipeline which is easy to detect.

In order to solve the technical problem, the invention is solved by the following technical scheme:

the utility model provides a buried pipeline, the pipeline unit that includes the multistage butt joint of each other, the pipeline unit includes the body, the embedding has along body length direction's conductive metal wire in the pipe wall of body, the both ends of body are provided with respectively inserts the end and inserts the end, and insert the end and insert and be provided with location structure between the end, when two sections pipeline units of mutually supporting butt joint, the end that inserts of one of them pipeline unit inserts the end that inserts of another pipeline unit, and make two adjacent pipeline units's conductive metal wire touch location butt joint mutually through location structure.

Through the scheme, the conductive metal wires are arranged inside the pipe wall of the pipe unit along the pipe direction, and the conductive metal wires of the pipe units can be mutually touched and connected after being butted, so that the buried pipeline is still a PE pipeline as a main body when practical, the performance is stable, and the buried pipeline can be conveniently detected by the detection equipment due to the embedded continuous conductive metal wires.

Preferably, the pipe wall of the pipe body is provided with a wire penetrating hole for embedding a conductive metal wire, the positioning structure comprises a positioning protrusion arranged on the end face of the pipe body at one end of the inserting end of the pipe unit and a positioning recess arranged on the end face of the pipe body at one end of the inserting end of the pipe unit, the positioning protrusion comprises a conductive metal wire of which the end is exposed out of the end face of the pipe body at one end of the inserting end of the pipe body, the positioning recess comprises a wire penetrating hole arranged on the end face of the pipe body at one end of the inserting end of the pipe body, when the two pipe units are mutually butted, the conductive metal wire of one end of the inserting end of one pipe unit is inserted into the wire penetrating hole of one end of the inserting end of the other pipe unit, and.

Through above-mentioned scheme, through location structure's setting, make things convenient for the butt joint of the conductive metal silk between the pipeline unit of each butt joint, avoid appearing the problem of crisscross unable butt joint, and the conductive metal silk that possesses through body itself and the function that wire feed hole realized location structure, further retrench structural design.

Preferably, an annular clamping ring is arranged on the outer pipe surface of the insertion end, an inclined guide surface is arranged on the clamping ring in the direction towards the end of the insertion end, a clamping groove matched with the clamping ring is formed in the inner pipe wall of the insertion end, when two pipeline units are in butt joint, the insertion end is inserted into the insertion end, and the clamping ring is clamped into the clamping groove to limit the relative movement of the two adjacent pipe bodies in the axial direction.

Through the scheme, the mutual locking of the insertion end and the axial direction between the insertion ends is realized through the matching of the clamping ring and the clamping groove, the operation is simple and convenient, the butt joint can be carried out in a mode of external threads and internal threads, but the operation is relatively troublesome.

Preferably, a sealing structure is arranged between the insertion end and the plug end, and comprises a first sealing ring and a second sealing ring, wherein the first sealing ring is arranged on at least one ring of the outer wall of the insertion end and is sunken inwards, the second sealing ring is arranged on at least one ring of the inner wall of the plug end and is matched with the first sealing ring, the number and the ring width of the first sealing ring and the second sealing ring are the same, and the first sealing ring and the second sealing ring are respectively in one-to-one correspondence after the insertion end is inserted into the plug end.

Preferably, the first sealing ring and the second sealing ring are both provided with sealing rings, outer rings of the sealing rings respectively protrude out of an outer pipe wall of the insertion end and an inner pipe wall of the insertion end, and after the insertion end is inserted into the insertion end, two mutually paired sealing rings are mutually extruded and attached.

Through above-mentioned scheme for when connecing spigot end and inserting the end and mutually supporting, realize extruding the laminating mutually by the sealing washer of embedding first sealing ring and the sealing washer of embedding second sealing ring, improve the leakproofness between body and the body.

Preferably, a sealing material which expands when heated is arranged in the first sealing ring, a heating wire is arranged in the second sealing ring, two conductive wires penetrate through the pipe wall of the pipe body, and two end parts of the heating wire are respectively connected with different conductive wires.

Preferably, the sealing substance comprises expandable graphite or foam.

Through above-mentioned scheme, through the electrically conductive wire circular telegram, the heating wire that is in the second seal ring intra-annular will generate heat, and then makes the sealing substance inflation that is in first seal ring intra-annular, and sealing substance will be full of whole first seal ring and second seal ring, realizes the strong sealed effect between two bodys.

Due to the adoption of the technical scheme, the invention has the remarkable technical effects that: set up continuous conductive metal wire in burying ground PE pipeline for buried pipeline can be by convenient detection, utilize conductive metal wire's basis simultaneously, set up the heating wire in the second sealing ring and make the expanded graphite sealing material that is in first sealing ring can obtain the inflation, will insert the end and connect and carry out the sealed of high efficiency between the spigot, and then satisfy the sealing performance between the body that the multistage set up and obtain guaranteeing.

Drawings

FIG. 1 is a schematic illustration of the butt joint of two end piping units of the present invention;

FIG. 2 is a schematic diagram of the split end piping unit of the present invention;

fig. 3 and 4 are exploded schematic views of the internal components of the piping unit of the present invention;

fig. 5 is a half-sectional view of a pipe body of the present invention.

In the figure: 1. a pipe body; 11. threading holes; 12. an insertion end; 121. a snap ring; 122. a first seal ring; 13. Connecting a plug end; 131. a second seal ring; 132. a card slot; 2. a sealing substance; 3. a conductive wire; 4. a heat generating wire.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

A buried pipeline, see fig. 1-5, includes a plurality of sections of pipeline units that are butted with each other, for convenience of illustration, in this embodiment 1, only two sections of pipeline units are used, and both sections of pipeline units are straight pipes, but also can be formed by butting bent pipes, and the connection mode is the same as that of both ends of the straight pipes.

The pipeline unit comprises a pipe body 1, a wire penetrating hole 11 is arranged in the pipe wall of the pipe body 1 in a penetrating mode, and a conductive metal wire 3 penetrates into the wire penetrating hole 11. One end of the tube body 1 is an insertion end 12, the other end is a connection end 13, the conductive metal wire 3 extends out of the wire through hole 11 at the end part of the tube body 1 close to the connection section, the wire through hole 11 is not exposed at the end part of the tube body 1 close to the insertion end 12, so that the insertion end 12 is inserted into the connection end 13 after butt joint, the conductive metal wire 3 on one tube body 1 is inserted into the wire through hole 11 on the other tube body 1, when the connection and the insertion are realized, the butt joint angle between the two tube bodies 1 is positioned, and the conductive metal wire 3 between the two tube bodies 1 can be ensured to realize the mutual butt joint touch connection effect.

When the two pipe bodies 1 are butted, the insertion end 12 of one of the pipe bodies 1 is inserted into the connection end 13 of the other pipe body 1, and the clamping ring 121 is clamped into the clamping groove 132, so that the butt joint is realized.

In order to avoid leakage at the joint, a sealing structure is arranged between the insertion end 12 and the connection end 13, the sealing structure comprises a first sealing ring 122 and a second sealing ring 131 which are matched with each other, the first sealing ring 122 is arranged on the outer pipe wall of the insertion end 12, an annular recess is arranged, the second sealing ring 131 is arranged on the inner pipe wall of the connection section, and the annular recess is arranged, so that when the insertion end 12 and the connection end 13 are connected with each other, the first sealing ring 122 and the second sealing ring 131 form a finished cavity. A circle of sealing material 2 which can expand when heated is arranged on the first sealing ring 122, the sealing material 2 is expanded graphite, a heating metal wire 4 similar to a heating resistor is arranged on the second sealing ring 131, and two ends of the heating metal wire 4 are respectively connected with two conductive metal wires 3 penetrating into the pipe body 1. Therefore, after the plurality of pipeline units are butted, the two conductive metal wires 3 are electrified, the heating metal wire 4 in each pipeline unit generates heat, the sealing substance 2 is heated and expanded to be full of the hostile sealing ring and the second sealing ring 131, and strong sealing is realized.

Example 2

The difference from embodiment 1 is the sealing structure, here, a first sealing ring is arranged in the first sealing ring 122, and after the first sealing ring 122 is installed, the outer ring is slightly larger than the outer pipe diameter of the insertion end 12; a second sealing ring is arranged in the second sealing ring 131, and after the second sealing ring 131 is installed in the second sealing ring, the inner ring is slightly smaller than the inner pipe diameter. Therefore, when the plug end 13 and the insertion end 12 are mutually matched, the first sealing ring of the first sealing ring 122 and the second sealing ring embedded into the second sealing ring 131 are mutually extruded and attached, and the sealing performance between the pipe body 1 and the pipe body 1 is improved.

Example 3

The difference from embodiment 1 is that positioning protrusions and positioning depressions are separately provided at both ends of the tube body 1, and the conductive wire 3 of each tube body 1 slightly protrudes from both ends of the tube body 1. When two bodys 1 butt joint each other, guarantee that the location arch of a body 1 inserts the location of another body 1 sunken to the installation angle between two bodys 1 is restricted, and when butt joint this moment after, the electrically conductive wire 3 between two body 1 tip will touch the butt joint each other. In this way, the butting performance of the conductive wire 3 is slightly inferior compared to that of example 1, and the way of example 1 is preferred.

Claims

1. A buried pipeline comprises a plurality of sections of pipeline units which are mutually butted, and is characterized in that each pipeline unit comprises a pipe body (1), conductive metal wires (3) along the length direction of the pipe body (1) are embedded in the pipe wall of the pipe body (1), an inserting end (12) and a plugging end (13) are respectively arranged at two ends of the pipe body (1), a positioning structure is arranged between the inserting end (12) and the plugging end (13), when two sections of pipeline units which are matched with each other are butted, the inserting end (12) of one pipeline unit is inserted into the plugging end (13) of the other pipeline unit, the conductive metal wires (3) of two adjacent pipeline units are mutually touched, positioned and butted through the positioning structure, a sealing structure is arranged between the inserting end (12) and the plugging end (13), and the sealing structure comprises a first sealing ring (122) which is sunken in at least one ring of the outer pipe wall of the inserting end (12) and at least one ring and a first sealing ring which are arranged on the inner pipe wall of the The ring (122) complex second sealing ring (131), the number and the ring width homogeneous phase of first sealing ring (122) and second sealing ring (131) are the same, and insert end (12) and insert and connect first sealing ring (122) and second sealing ring (131) one-to-one respectively after inserting end (13), be provided with the sealing substance (2) of thermal expansion in first sealing ring (122), be provided with in second sealing ring (131) and generate heat wire (4), and wear to be equipped with two conductive metal silk (3) in the pipe wall of body (1), the both ends of generating heat wire (4) are connected with different conductive metal silk (3) respectively.

2. A buried pipeline according to claim 1, wherein the pipe wall of the pipe body (1) is provided with a threading hole (11) for inserting the conductive wire (3), the positioning structure comprises a positioning protrusion provided on the end face of the pipe body (1) at the end of the inserting end (13) of the pipeline unit and a positioning recess provided on the end face of the pipe body (1) at the end of the inserting end (12) of the pipeline unit, the positioning protrusion comprises the conductive wire (3) with its end exposed out of the end face of the pipe body (1) at the end of the inserting end (13) of the pipe body (1), the positioning recess comprises the threading hole (11) provided on the end face of the pipe body (1) at the end of the inserting end (12) of the pipe body (1), when two pipeline units are butted with each other, the conductive wire (3) at the end of the inserting end (13) of one pipeline unit is inserted into the threading hole (11) at the end of the inserting end (, and the conductive metal wire (3) positioned in the wire penetrating hole (11) is contacted with the conductive metal wire (3) inserted into the wire penetrating hole (11).

3. Buried pipeline according to claim 1, characterized in that the outer pipe surface of the insertion end (12) is provided with a ring-shaped snap ring (121), the snap ring (121) is provided with an inclined guide surface towards the end of the insertion end (12), the inner pipe wall of the insertion end (13) is provided with a snap groove (132) matched with the snap ring (121), when two pipeline units are butted, the insertion end (12) is inserted into the insertion end (13), and the snap ring (121) is snapped into the snap groove (132) to limit the relative movement of the two adjacent pipe bodies (1) in the axial direction.

4. Buried pipeline according to claim 1, characterised in that sealing rings are provided in both the first sealing ring (122) and the second sealing ring (131), and the outer rings of the sealing rings respectively protrude from the outer pipe wall of the insertion end (12) and from the inner pipe wall of the spigot end (13), and when the insertion end (12) is inserted into the spigot end (13), the two mutually mating sealing rings are pressed against each other.

5. A buried pipeline according to claim 1, characterised in that the sealing substance (2) comprises expandable graphite or foam.