CN216976075U

CN216976075U - High-strength anti-fracture PE gas pipe

Info

Publication number: CN216976075U
Application number: CN202123376049.1U
Authority: CN
Inventors: 周少杰; 谢锋; 袁勇; 陈辉; 何建伟; 傅铁平; 陶海; 胡益骅; 蒋少柯
Original assignee: Zhejiang Haizu Pipe Co ltd
Current assignee: Zhejiang Haizu Pipe Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-07-15
Anticipated expiration: 2031-12-29

Abstract

The utility model relates to the technical field of gas pipes, and discloses a high-strength anti-cracking PE gas pipe which comprises a gas pipe and a butt joint, wherein the gas pipe comprises a polyethylene main pipe body and fixed joints fixed at two ends of the polyethylene main pipe body, the fixed joints comprise a polyethylene outer cladding layer and a polyethylene lining, which are fixedly connected to two ends of the polyethylene main pipe body in a hot melting manner, the polyethylene lining is positioned inside the polyethylene outer cladding layer, the polyethylene lining and the polyethylene outer cladding layer are equal in thickness, a steel welding joint is arranged between the polyethylene lining and the polyethylene outer cladding layer in a hot melting manner in an embedded manner, and one half of the steel welding joint is embedded in a clamping layer of the polyethylene outer cladding layer and the polyethylene lining. The utility model can ensure the integrity of the polyethylene outer cladding layer on the premise of ensuring the welding strength by arranging the steel mesh layer, has small thermal stress deformation of welding and high sealing property, and forms good sealing property and strength by the processes of pipe thread sealing and welding fixing.

Description

High-strength anti-fracture PE gas pipe

Technical Field

The utility model relates to the technical field of gas pipes, in particular to a high-strength anti-cracking PE gas pipe.

Background

At present, the pipe material selected by the gas pipe network is mainly a cast iron pipe, and also comprises a steel pipe, a white iron insulating pipe, a PE pipe and the like; the main interface form of pipe network has mechanical interface, the blue and white interface, the cement interface, steel pipe electric welding, the flange interface, the silk mouth interface, PE pipe hot-melt welding etc. these tubular product and interface mostly can not play plus irregular pressure, once stressed, then heavy then leaks gas on the spot, then light also can leave the hidden danger, often take place gas leakage or gas supply failure in several months after the road surface is restoreed, the body fracture even, leak in a large number and cause the accident, provide a high strength anti-rupture PE gas pipe in view of the not enough of the joint strength of current PE gas pipe.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: in order to overcome the problems existing in the above, a high-strength rupture-preventing PE gas pipe is provided, which solves the above-mentioned problems.

The technical problem to be solved by the utility model is realized by adopting the following technical scheme:

a high-strength anti-cracking PE gas pipe comprises a gas pipe and butt joints, wherein the gas pipe comprises a polyethylene main pipe body and fixed joints fixed at two ends of the polyethylene main pipe body;

the fixed joint comprises a polyethylene outer surrounding layer and a polyethylene lining which are fixedly connected with the two ends of the polyethylene main pipe body in a hot melting mode, the polyethylene lining is located inside the polyethylene outer surrounding layer, the polyethylene lining is as thick as the polyethylene outer surrounding layer, a steel welding head is arranged between the polyethylene lining and the polyethylene outer surrounding layer in a hot melting embedding mode, one half of the steel welding head is embedded in an interlayer of the polyethylene outer surrounding layer and the polyethylene lining, the other half of the steel welding head is exposed outside, a steel net layer is sleeved on the part, exposed outside, of the steel welding head, the butt joint is communicated left and right, the inner diameter of the butt joint is consistent with the pipe diameter of the polyethylene main pipe body, single-side open ring grooves are formed in wall bodies at the left end and the right end of the butt joint, the ring grooves enable the left end and the right end of the butt joint to form an inner steel cylinder and an outer steel cylinder, the outer wall of the outer steel cylinder is at least provided with two welding rings at intervals, the welding rings are annular grooves, and the width of each welding ring is at least larger than the diameter and the length of two meshes of the steel net layer.

Preferably, the butt joint and the butt joint with the junction department suit of steel soldered connection is equipped with the polyethylene sleeve, the complete cladding of polyethylene sleeve the butt joint with and the junction of steel soldered connection, the polyethylene sleeve with have at least between the polyethylene surrounding layer the clearance of the wall thickness of polyethylene sleeve, the polyethylene sleeve with clearance department between the polyethylene surrounding layer is filled with the foamed rubber.

Preferably, the polyethylene outer cladding layer and the outer ring spacer sleeve of the butt joint are provided with a plurality of anti-skid steel rings, and the spacing distance of the anti-skid steel rings is not larger than the diameter of the steel welding head.

Preferably, a polytetrafluoroethylene ring is arranged in the ring groove; the polytetrafluoroethylene ring is subjected to extrusion deformation of the polyethylene outer cladding layer, the thickness of the polytetrafluoroethylene ring is increased, and the polytetrafluoroethylene ring is tightly abutted to the annular groove and the inner wall of the inner layer steel cylinder to form corrosion prevention and rust prevention sealing.

Preferably, the connecting threads of the steel welding head and the ring groove are angle pipe sealing threads, and the rotating directions of the connecting threads at two ends of the butt joint are opposite; when the butt joint is installed on site, the two ends of the butt joint can be simultaneously screwed by rotating the butt joint, and the sealing performance is good.

Preferably, the length of the exposed part of the steel welding head is not less than the diameter of the gas pipe.

The utility model has the advantages and positive effects that: through the setting of steel stratum reticulare can be guaranteed under the prerequisite of guaranteeing welding strength the integrality of polyethylene surrounding layer to its welded thermal stress deformation is little leakproofness high, forms good leakproofness and intensity through pipe thread sealing and welded fastening technology, and guarantees through the packing of polytetrafluoroethylene circle and foamed rubber that the splice does not receive the corruption of soil erosion material and steam, and the cooperation of foamed rubber and polyethylene sleeve can carry out effectual buffering to the junction simultaneously, absorbs partial sudden change pressure and disturbance.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of a half-section of the present invention;

FIG. 2 is a schematic of the present invention;

fig. 3 is a schematic structural view of the gas pipe in fig. 1 sleeved with a polyethylene sleeve.

The scores in the figures are as follows: 10. a polyethylene sleeve; 11. foam rubber; 12. an anti-skid steel ring; 13. A polyethylene outer coating; 14. a steel mesh layer; 15. a polyethylene liner; 16. a butt joint; 17. welding a ring; 18. an inner layer steel cylinder; 19. a ring groove; 20. an outer layer steel cylinder; 21. a gas pipe; 22. a polytetrafluoroethylene ring; 23. a steel welding head; 24. fixing a joint; 25. polyethylene main pipe body.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

The embodiments of the utility model will be described in further detail below with reference to the accompanying drawings:

as shown in fig. 1-3, the high-strength anti-cracking PE gas pipe according to the present invention includes a gas pipe 21 and a butt joint 16, where the gas pipe 21 includes a main polyethylene pipe 25 and fixed joints 24 fixed at two ends of the main polyethylene pipe 25;

the fixed joint 24 comprises a polyethylene outer cladding layer 13 and a polyethylene lining 15 which are fixedly connected with two ends of a polyethylene main pipe body 25 in a hot melting mode, the polyethylene lining 15 is located inside the polyethylene outer cladding layer 13, the polyethylene lining 15 and the polyethylene outer cladding layer 13 are equal in thickness, a steel welding joint 23 is arranged between the polyethylene lining 15 and the polyethylene outer cladding layer 13 in a hot melting embedding mode, one half of the steel welding joint 23 is embedded in an interlayer of the polyethylene outer cladding layer 13 and the polyethylene lining 15, the other half of the steel welding joint is exposed outside, a steel net layer 14 is sleeved on the part, exposed outside, of the steel welding joint 23, the butt joint 16 is communicated from left to right, the inner diameter of the butt joint 16 is consistent with the pipe diameter of the polyethylene main pipe body 25, single-side open ring grooves 19 are arranged on wall bodies at the left end and the right end of the butt joint 16, and the ring grooves 19 enable the left end and the right end of the butt joint 16 to form an inner steel cylinder 18, the inner layer and the outer layer of the outer layer steel cylinder 20 are provided, the inner wall of the front end of the polyethylene outer cladding layer 13 and the outer wall of the inner layer steel cylinder 18 are provided with mutually meshed threads, the outer wall of the outer layer steel cylinder 20 is at least provided with two spaced welding rings 17, each welding ring 17 is an annular groove, and the width of each welding ring 17 is at least larger than the diameter and the length of two meshes of the steel mesh layer 14; after the polyethylene outer cladding 13 is meshed with the inner steel cylinder 18 during connection, the welding ring 17 at a thinner part is welded through by welding to form a firm weld with the steel mesh layer 14, and it should be noted that the steel mesh layer 14 can ensure the integrity of the polyethylene outer cladding 13 on the premise of ensuring the welding strength, and the welding has small thermal stress deformation and high sealing property.

Preferably, a polyethylene sleeve 10 is sleeved at the butt joint 16 and the connection section of the butt joint 16 and the steel welding joint 23, the polyethylene sleeve 10 completely covers the butt joint 16 and the connection between the butt joint 16 and the steel welding joint 23, a gap between the polyethylene sleeve 10 and the polyethylene outer cladding 13, which is at least the thickness of the polyethylene sleeve 10, is formed, and a gap between the polyethylene sleeve 10 and the polyethylene outer cladding 13 is filled with foam rubber 11; the parcel of foamed rubber 11 can be right the invasion that welding ring 17 department carried out effectual sealed steam of avoiding prevents to rust to easy operation convenient to use, clearance when also being convenient for maintain, the displacement that sinks is eliminated partly in the deformation of accessible foamed rubber 11 when simultaneously owing to the oppression of the landfill thing of landfill back pipeline top and this oppression power change, avoids the pipeline of gravity oppression highway section to take place destructive deformation.

Preferably, the polyethylene outer cladding layer 13 and the outer ring of the butt joint 16 are provided with a plurality of anti-skid steel rings 12 in a spaced manner, and the spacing distance between the anti-skid steel rings 12 is not greater than the diameter of the steel welding joint 23; facilitating the coagulation of the foam 11 and preventing it from axial displacement.

Preferably, a polytetrafluoroethylene ring 22 is arranged in the ring groove 19; the polytetrafluoroethylene ring 22 is enlarged in thickness and tightly abutted to the annular groove 19 and the inner wall of the inner layer steel cylinder 18 after being extruded and deformed by the polyethylene outer cladding layer 13 to form corrosion prevention and rust prevention sealing.

Preferably, the connection thread of the steel welding head 23 and the ring groove 19 is a 55-degree pipe sealing thread, and the connection thread directions of the two ends of the butt joint 16 are opposite; the two ends of the butt joint 16 can be simultaneously screwed together by rotating the butt joint during field installation, and the sealing performance is good.

Preferably, the length of the exposed part of the steel welding head 23 is not less than the diameter of the gas pipe 21.

In specific implementation, two sections of gas pipes 21 at preset positions are arranged on a translation bracket, one butt joint 16 is arranged between the gas pipes 21, the left and right gas pipes 21 are pushed to be close to enable the screw teeth of the polyethylene outer cladding 13 to be meshed in the screw grooves of the butt joint 16, then the butt joint 16 is slowly rotated, and proper thrust is applied to the gas pipe 21, so that the butt joint 16 and the gas pipe 21 are completely screwed together until the exposed polyethylene outer cladding 13 is not seen, the front end of the polyethylene outer cladding 13 is pressed against one end of the polytetrafluoroethylene ring 22, then carrying out penetration spot welding at the welding ring 17, after cooling and processing the welding flux, sleeving the antiskid steel ring 12 on the butt joint 16 and the transition section of the butt joint 16 and the fixed joint 24 at intervals, sleeving the polyethylene sleeve 10 outside the antiskid steel ring 12, and then injecting the foam rubber 11 into the polyethylene sleeve 10, and cooling and drying after filling.

It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but other embodiments derived from the technical solutions of the present invention by those skilled in the art are also within the scope of the present invention.

Claims

1. The utility model provides a PE gas pipe that breaks is prevented to high strength which characterized in that: the gas pipe comprises a gas pipe (21) and a butt joint (16), wherein the gas pipe (21) comprises a polyethylene main pipe body (25) and fixed joints (24) fixed at two ends of the polyethylene main pipe body (25);

the fixed joint (24) comprises a polyethylene outer cladding layer (13) and a polyethylene inner lining (15) which are fixedly connected with two ends of a polyethylene main pipe body (25) in a hot melting mode, the polyethylene inner lining (15) is located inside the polyethylene outer cladding layer (13), the polyethylene inner lining (15) and the polyethylene outer cladding layer (13) are equal in thickness, a steel welding joint (23) is arranged between the polyethylene inner lining (15) and the polyethylene outer cladding layer (13), one half of the steel welding joint (23) is embedded in the polyethylene outer cladding layer (13) and an interlayer of the polyethylene inner lining (15), the other half of the steel welding joint is exposed outside, a steel net layer (14) is sleeved on the part of the steel welding joint (23) exposed outside, the butt joint (16) is communicated from left to right, and the inner diameter of the butt joint (16) is consistent with the pipe diameter of the polyethylene main pipe body (25), be equipped with open annular of unilateral (19) on the wall body of both ends about butt joint (16), annular (19) make both ends form inlayer steel cylinder (18) about butt joint (16), and the inside and outside two-layer of outer steel cylinder (20), the front end inner wall of polyethylene surrounding layer (13) and be equipped with intermeshing's screw thread on the outer wall of inlayer steel cylinder (18), the outer wall of outer steel cylinder (20) is equipped with two welding rings (17) at least at intervals, welding ring (17) are the ring channel, the width of welding ring (17) is greater than at least two mesh purpose diameter length of steel stratum reticulare (14).

2. The high-strength anti-cracking PE gas pipe as claimed in claim 1, wherein: butt joint (16) and butt joint (16) with the junction department suit of steel soldered connection (23) is equipped with polyethylene sleeve (10), polyethylene sleeve (10) complete cladding butt joint (16) and with the junction of steel soldered connection (23), polyethylene sleeve (10) with have at least between polyethylene surrounding layer (13) the clearance of the wall thickness of polyethylene sleeve (10), polyethylene sleeve (10) with clearance department between polyethylene surrounding layer (13) is filled with foamed glue (11).

3. The high-strength anti-cracking PE gas pipe as claimed in claim 2, wherein: the polyethylene outer cladding layer (13) and the outer ring of the butt joint (16) are sleeved with a plurality of anti-skid steel rings (12) at intervals, and the interval distance of the anti-skid steel rings (12) is not larger than the diameter of the steel welding head (23).

4. A high-strength rupture-preventing PE gas pipe as set forth in claim 1 or 3, characterized in that: a polytetrafluoroethylene ring (22) is arranged in the annular groove (19).

5. The high-strength anti-cracking PE gas pipe as claimed in claim 4, wherein: the connecting threads of the steel welding head (23) and the ring groove (19) are 55-degree pipe sealing threads, and the rotating directions of the connecting threads at two ends of the butt joint (16) are opposite.

6. The high-strength anti-cracking PE gas pipe as claimed in claim 5, wherein: the length of the exposed part of the steel welding head (23) is not less than the diameter of the gas pipe (21).