CN115949806A - Double-reinforced all-steel spiral-line polyethylene composite pipe and connecting pipe fitting - Google Patents
Double-reinforced all-steel spiral-line polyethylene composite pipe and connecting pipe fitting Download PDFInfo
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- CN115949806A CN115949806A CN202211565229.0A CN202211565229A CN115949806A CN 115949806 A CN115949806 A CN 115949806A CN 202211565229 A CN202211565229 A CN 202211565229A CN 115949806 A CN115949806 A CN 115949806A
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Abstract
The invention provides a double-reinforced all-steel spiral line polyethylene composite pipe and a connecting pipe fitting, and relates to the technical field of steel reinforced composite pipes. Including barrier layer, polyethylene inlayer, all-steel enhancement layer, the outer and the protective layer that set gradually from interior to exterior, the both sides cladding of all-steel enhancement layer has one deck bonding resin layer, and the tip of compound tubular product is equipped with the reinforcing ring layer, and the reinforcing ring layer is located between polyethylene skin and the protective layer. The pipe provided by the invention has the advantages of high strength, simple connecting pipe fitting, no need of treatment of an oxide layer and marking of socket depth, and can be used for reducing the burden of workers, improving the installation efficiency and prolonging the service life.
Description
Technical Field
The invention relates to the technical field of steel reinforced composite pipes, in particular to a double-reinforced all-steel spiral line polyethylene composite pipe and a connecting pipe fitting.
Background
Polyethylene (PE) pipelines are widely applied to various fields due to the advantages of excellent physical properties, corrosion resistance, good sealing property, good wear resistance and the like. Ranging from small section yellow pipes for natural gas to thick walled black pipes of 48in diameter for industrial and urban pipelines. Large diameter hollow wall pipes are also growing very rapidly as a replacement for concrete made storm drains and other sewer lines. With the increasingly complex application environment of polyethylene pipelines, various performance requirements of polyethylene pipelines are increasingly higher, and therefore much research is conducted on polyethylene pipelines.
Ordinary steel wire net reinforcing composite pipe and PE pipe (polyethylene pipe) adopt the steel wire net as reinforcing material and PE compound, although reinforced PE pipe to a certain extent, still have some defects: the polyethylene pipe is free of a protective layer, is placed on the ground during unloading, and is easy to scratch when being contacted with sharp objects such as stones, water is filled after connection, the stress is easy to crack, and the pressure of the crack is easy to rapidly increase after the outer surface of the polyethylene pipe is scratched; during storage, the storage is not always in a shady and cool condition, and the service life is influenced after the storage is exposed to the sun; secondly, after the pipes are welded, the adhesive layer is damaged at high temperature, the steel wire reinforcing layer cannot be fixed after water is supplied, and bulges can occur after pressure bearing; thirdly, the installation process is complicated when the pipe fitting is connected with the pipe: sequentially comprises oxide layer removal, oxide layer treatment, welding section cleaning, pipe fitting measurement, pipe fitting marking, socket depth marking, socket pipe fitting and power-on welding; fourthly, because a gap exists between the pipe and the pipe fitting in a socket joint mode, the pipe is easy to catch fire after welding, and the pipe fitting is easy to leak because the socket joint depth of the pipe fitting is not marked; fifthly, the high-density polyethylene HDPE has good chemical corrosion resistance, but the gas barrier property is poor, under the condition of high pressure, various small molecule gases easily penetrate through the inner wall polyethylene material to contact with the reinforcing material, the corrosive gases generate chemical corrosion after contacting with steel, water vapor can generate hydrolytic corrosion after contacting with glass fibers, the polyethylene material also has hydrocarbon corrosion, and therefore the reinforcing layer generates various corrosion, so that the composite pipe fails after being used for a period of time.
In view of the deficiencies of the prior art, it is desirable to provide a dual reinforced all-steel helical wire polyethylene composite pipe and connecting pipe fitting that solves the problems set forth above in the background art.
Disclosure of Invention
The invention aims to provide a double-reinforced all-steel spiral line polyethylene composite pipe and a connecting pipe fitting, which can provide a solution for the defects in the prior art, can resist scratch, ultraviolet rays and oxidation, can avoid polishing an oxidation layer, does not need to mark socket depth, reduces the connecting steps of the pipe fitting, protects the composite pipe from being scratched by a protective layer, and can reduce the problems of bulging, firing, water leakage and the like after the pipe fitting is connected.
The embodiment of the invention provides a double-reinforced all-steel spiral polyethylene composite pipe and a connecting pipe fitting, which comprise a polyethylene inner layer, an all-steel reinforcing layer, a polyethylene outer layer and a protective layer which are sequentially arranged from inside to outside, wherein two sides of the all-steel reinforcing layer are coated with a bonding resin layer, the end part of the composite pipe is provided with a reinforcing ring layer, and the reinforcing ring layer is arranged between the polyethylene outer layer and the protective layer.
In some embodiments of the present invention, the inner polyethylene layer is further provided with a barrier layer on the inner side, and the barrier layer is made of nylon-11 or ethylene-vinyl alcohol copolymer.
In some embodiments of the present invention, the reinforcing ring layer is made of polyethylene, fiber or stainless steel, and the tensile strength of the material used for the reinforcing ring layer is not less than 22MPa.
In some embodiments of the present invention, the protective layer is made of glass fiber reinforced polypropylene.
In some embodiments of the present invention, the all-steel reinforcement layer is spirally wound left and right to form a net-shaped skeleton.
The embodiment of the invention also provides a connecting pipe fitting of the double-reinforced all-steel spiral wire polyethylene composite pipe, which comprises a double-reinforced electric hot melting pipe fitting, wherein the double-reinforced electric hot melting pipe fitting comprises a polyethylene layer and a reinforced skeleton layer arranged in the polyethylene, an insertion area is arranged at the end part of the polyethylene layer, the caliber of the insertion area is larger than the external diameter of the composite pipe, the insertion area comprises a melting area and a non-heating area positioned at the end part, an electric fuse is arranged on the inner side wall of the melting area, penetrates through the polyethylene layer and is connected with a binding post arranged outside, and an insulating layer is coated outside the polyethylene layer.
In some embodiments of the present invention, the reinforcing frame is made of fiber, steel wire or steel plate, and the reinforcing frame layer is formed by compounding adhesive resin and the polyethylene layer.
In some embodiments of the invention, the length of the non-heating zone is less than or equal to 5mm.
The embodiment of the invention also provides a connecting pipe fitting of a double-reinforced all-steel spiral polyethylene composite pipe, which comprises a double-reinforced metal connecting pipe fitting, wherein the double-reinforced metal connecting pipe fitting comprises two groups of inner taper sleeves and flanges, the inner taper sleeves are provided with taper holes, thread grooves are formed in the taper holes and are used for being in threaded connection with a connecting area of the composite pipe, the flanges are arranged between the two inner taper sleeves and are fixedly connected through bolts and nuts, a connecting piece penetrating through the inner part of the double-reinforced connecting pipe fitting is arranged between the two groups of inner taper sleeves, and two ends of the connecting piece penetrate through the end parts of the flanges.
In some embodiments of the present invention, the inner taper sleeve is made of carbon steel + galvanized steel, carbon steel + IPN8710 anticorrosive material or 316 stainless steel material.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
the composite pipe comprises a blocking layer, a polyethylene inner layer, an all-steel reinforcing layer, a polyethylene outer layer and a protective layer which are sequentially arranged from inside to outside, wherein two sides of the all-steel reinforcing layer are coated with a bonding resin layer, the end part of the composite pipe is provided with a reinforcing ring layer, and the reinforcing ring layer is arranged between the polyethylene outer layer and the protective layer. The composite pipe is formed by compounding the all-steel reinforcing layer with the polyethylene inner layer and the polyethylene outer layer, the strength of a polyethylene pipeline is greatly increased, the surface of the pipe can be protected from being scratched and can resist oxidation and ultraviolet rays by arranging the protective layer outside the composite pipe, the service life of the pipe is effectively prolonged, the problem that the joint bulges at the joint after water is filled and pressure is borne due to the fact that the glue layer of the joint is damaged by high-temperature welding of an electric melting pipe fitting can be avoided by arranging the reinforcing ring layer at the end part of the composite pipe, the connected pipe can be corrected, the problem that a gap exists between the pipe and the pipe fitting in a socket joint mode and the ignition problem caused after welding can be solved, the socket depth can be determined, and the problem of pipe fitting water leakage caused by the fact that the socket depth of the pipe fitting is not marked can be solved; the pipe provided by the invention has the advantages of high strength, simple connecting pipe fitting, no need of treatment of an oxide layer and marking of socket depth, and can be used for reducing the burden of workers, improving the installation efficiency and prolonging the service life.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a cross-sectional view of a dual reinforced all-steel helical wire polyethylene composite pipe in an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a dual reinforced all steel helical wire polyethylene composite pipe according to another embodiment of the present invention;
FIG. 3 is a cross-sectional view of a dual enhanced electric hot melt connecting pipe according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a dual reinforced metal connecting pipe in an embodiment of the invention.
Reference numerals: 100. an inner polyethylene layer; 101. an all-steel reinforcement layer; 102. an outer polyethylene layer; 103. a protective layer; 104. a reinforcing ring layer; 105. a barrier layer; 200. a polyethylene layer; 201. a reinforcing carcass layer; 202. an electric fuse; 203. a non-heating zone; 204. a binding post; 205. an insulating layer; 300. an inner taper sleeve; 301. a flange; 302. a thread groove; 303. a bolt; 304. a nut; 305. a connecting member; 400. a composite pipe.
Detailed Description
Examples
Referring to fig. 1 to 4, fig. 1 is a structural sectional view of a dual reinforced all-steel helical wire polyethylene composite pipe in an embodiment of the present invention; FIG. 2 is a cross-sectional view of a dual reinforced all steel helical wire polyethylene composite pipe according to another embodiment of the present invention; FIG. 3 is a cross-sectional view of a dual enhanced electric hot melt connecting pipe according to an embodiment of the present invention; FIG. 4 is a schematic structural view of a dual reinforced metal joining pipe according to an embodiment of the present invention;
the method specifically comprises the following steps: the composite pipe comprises a polyethylene inner layer 100, an all-steel reinforcing layer 101, a polyethylene outer layer 102 and a protective layer 103 which are sequentially arranged from inside to outside, wherein two sides of the all-steel reinforcing layer 101 are coated with a bonding resin layer, the end part of the composite pipe 400 is provided with a reinforcing ring layer 104, and the reinforcing ring layer 104 is arranged between the polyethylene outer layer 102 and the protective layer 103.
A dual reinforced all steel helical wire polyethylene composite pipe of the present exemplary embodiment will be further described below.
In an embodiment of this embodiment, the dual-reinforced all-steel helical-wire polyethylene composite pipe 400 includes an inner polyethylene layer 100, an all-steel reinforcing layer 101, an outer polyethylene layer 102, and a protective layer 103, which are sequentially disposed from inside to outside, the all-steel reinforcing layer 101 is spirally wound left and right to form a mesh skeleton, the surface of the mesh skeleton should be free of dirt such as oil stain, color spots, and dirt, and damage and indentation, and the like, and the mesh skeleton has no defects harmful to use, and the like, and the all-steel reinforcing layer 101 is coated with a bonding resin layer on both sides, it should be noted that the bonding property between the steel mesh skeleton and the polyethylene is poor, so the tensile strength of the material used for the reinforcing ring layer 104 is not less than 22 by coating a bonding resin layer on both sides of the steel mesh skeleton, and performing composite molding by using the bonding resin and the polyethylene, the end of the composite pipe 400 is provided with the reinforcing ring layer 104, the reinforcing ring layer 104 is disposed between the outer polyethylene layer 102 and the protective layer 103, and is located at a specific position outside the pipe end welding zone, and the reinforcing ring layer 104 is made of polyethylene, and the reinforcing ring layer is made of polyethylene, and can resist swelling at a high-temperature welding joint, thereby avoiding a water-bearing joint problem caused by electric fusion-melting connection of the pipe; the reinforcing ring layer 104 protrudes towards the outside of the pipe, so that the deviation can be corrected when the pipe is connected with the pipe, the reinforcing ring layer 104 of the pipe is abutted against the pipe during connection, the pipe is tightly attached without a gap, and the problem that the common pipe is easy to catch fire due to the fact that the pipe and the pipe are inserted and inserted to form a gap after welding can be solved; the reinforcing ring layer 104 is arranged at the specific position of the pipe end, so that socket depth is determined, a measuring scale is not needed for measuring and marking the socket depth, and the problem of water leakage of the pipe fitting caused by the fact that the socket depth of the pipe fitting is not marked for some reasons is solved. Compared with the common pipe which needs to remove an oxidation layer and carry out oxidation layer treatment when being connected with a pipe fitting, the pipe fitting can be connected by directly tearing the protective layer 103 at the outer end of the reinforced ring layer 104 during connection, the oxidation layer does not need to be polished, the pipe fitting does not need to be measured and marked, and labor and time cost can be saved. The pipe connection efficiency is improved.
As an example, the protection layer 103 is made of a glass fiber reinforced polypropylene (PP) material. The polyethylene outer layer 102 is covered with the protective layer 103 which is not welded with the pipe body, and the glass fiber reinforced polypropylene material has excellent corrosion resistance and excellent wear resistance, can resist oxidation and ultraviolet rays, effectively protects the polyethylene pipe and prevents the polyethylene pipe from being scratched by oxidation.
In one embodiment of this embodiment, a barrier layer 105 is further disposed on an inner side of the polyethylene inner layer 100, and the barrier layer 105 is made of nylon-11 or ethylene-vinyl alcohol copolymer.
It should be noted that the high density polyethylene HDPE has good chemical corrosion resistance, but its gas barrier property is not good, and under the condition of high pressure, various small molecule gases easily penetrate the inner wall polyethylene material to contact the reinforcing material; the corrosive gas generates chemical corrosion after contacting with steel, water vapor generates hydrolytic corrosion after contacting with glass fiber, and the polyethylene material also has carbon hydrogen corrosion. Therefore, the gas isolation material is used in the composite pipe lining pipe, so that the gas permeation amount can be greatly reduced, the possibility of corrosion of the reinforcing material is reduced, and the service life of the pipeline is remarkably prolonged; and oxygen can not permeate into the pipeline, so under the long-term working state, the inner wall of the pipeline does not breed bacteria and scale, and the purity and secondary zero pollution of the conveying medium can be ensured.
The adopted isolating material is nylon-11 (PA 11) or ethylene-vinyl alcohol copolymer (EVOH), preferably EVOH, which can improve the isolating performance by about thousands of times, so that the pipeline is basically not corroded in the whole life cycle, and the problem of pipeline corrosion can be well solved.
This embodiment still provides a connection pipe fitting of compound tubular product of two enhancement full steel helix polyethylene, specifically includes: two reinforcing electrothermal fusion pipe fittings, above-mentioned two reinforcing electrothermal fusion pipe fittings include polyethylene layer 200 and locate the inside reinforcing casing ply 201 of polyethylene, the tip of above-mentioned polyethylene layer 200 is equipped with the grafting district, the bore of grafting district is greater than the outside diameter of compound tubular product 400, above-mentioned grafting district is including melting the district and the non-zone of heating 203 that is located the tip, the length of non-zone of heating 203 is less than or equal to 5mm, the melting district inside wall is equipped with the electric fuse 202, the electric fuse 202 passes polyethylene layer 200 and is connected with the terminal 204 of locating outside, set up the non-zone of heating 203 of shorter region, it is outside to avoid the electric fuse 202 to be located the terminal surface to take place the electric smelting back outflow tubular product, and avoid the electric fuse 202 to leak in the tubular product outside, the staff mistake bumps and takes place the incident, the outer cladding one deck insulating layer 205 of above-mentioned polyethylene layer 200, protection staff's safety. The colors of the polyethylene layer 200 and the insulating layer 205 are set according to the color of the pipe, and are matched with the color of the pipe.
As an example, the reinforcing frame is made of fiber, steel wire or steel plate, and the reinforcing frame layer 201 is formed by compounding adhesive resin and the polyethylene layer 200, which greatly improves the strength of the connecting member 305. The reinforced framework is arranged in the polyethylene, so that the bearing capacity of the pipe fitting can be improved, the pipe fitting can be suitable for a pressure grade of 2.0-3.5MPa, and compared with a connecting pipe fitting (the pressure grade of 1.0-2.0 MPa) without the reinforced framework, the pipe fitting has the advantage that the bearing capacity is obviously improved.
Through adopting two reinforcing electric hot melt connecting pieces 305 to connect two reinforcing all steel helix polyethylene composite pipes 400, the intensity of its tubular product and the intensity homoenergetic of connecting piece 305 homoenergetic improve to improve the bulk strength between tubular product and the tubular product.
This embodiment still provides a connection pipe fitting of compound tubular product of two enhancement full steel helix polyethylene, specifically includes: the double-reinforced metal connecting pipe comprises two groups of inner taper sleeves 300 and flanges 301, wherein the inner taper sleeves 300 are provided with taper holes, thread grooves 302 are formed in the taper holes and are used for being in threaded connection with a connecting region of a composite pipe 400, the flanges 301 are arranged between the two inner taper sleeves 300 and are fixedly connected through bolts 303 and nuts 304, connecting pieces 305 penetrating through the inside of the double-reinforced connecting pipe are arranged between the two groups of inner taper sleeves 300, and the two ends of the connecting pieces 305 penetrate through the end portions of the flanges 301.
As an example, the inner taper sleeve 300 is made of carbon steel + galvanized steel, carbon steel + IPN8710 anti-corrosion material or 316 stainless steel material; the double-reinforced metal connecting pipe fitting is made of steel materials with higher strength, the strength of the double-reinforced metal connecting pipe fitting is enhanced in a steel and mechanical connection mode, and the strength of the double-reinforced metal connecting pipe fitting and the strength of the double-reinforced all-steel spiral wire polyethylene composite pipe 400 can be consistently improved, so that the overall strength between the pipe fitting and the pipe fitting is improved.
In the embodiment of the application, the mechanical properties of the dual-reinforced all-steel spiral polyethylene composite pipe 400 and the common steel wire mesh reinforced polyethylene composite pipe are tested and compared, and the comparison result is as follows:
table 1: hydrostatic strength and burst pressure test requirements of dual-reinforced all-steel spiral polyethylene composite pipe
Table 2: hydrostatic strength and burst pressure test requirements of common steel wire mesh reinforced polyethylene composite pipe
It can be known that under the same test conditions, the hydrostatic strength of the dual-reinforced full-steel spiral polyethylene composite pipe is greater than that of the common steel wire mesh reinforced polyethylene composite pipe.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a compound tubular product of full steel helix polyethylene of dual reinforcement which characterized in that, includes polyethylene inlayer, full steel enhancement layer, polyethylene skin and the protective layer that from interior to exterior set gradually, the both sides cladding of full steel enhancement layer has one deck bonding resin layer, the tip of compound tubular product is equipped with the reinforcing hoop layer, the reinforcing hoop layer is located the polyethylene skin with between the protective layer.
2. The dual-reinforced all-steel helical wire polyethylene composite pipe according to claim 1, wherein a barrier layer is further arranged on the inner side of the polyethylene inner layer, and the barrier layer is made of nylon-11 or ethylene-vinyl alcohol copolymer.
3. The dual-reinforced all-steel helical wire polyethylene composite pipe according to claim 1, wherein the reinforcing ring layer is made of polyethylene, fiber or stainless steel, and the tensile strength of the material of the reinforcing ring layer is not less than 22MPa.
4. The dual reinforced all-steel helical wire polyethylene composite pipe according to claim 1, wherein the protective layer is made of glass fiber reinforced polypropylene material.
5. The dual reinforced all-steel helical wire polyethylene composite pipe and connecting pipe fitting of claim 1, wherein the all-steel reinforcing layer is spirally wound left and right to form a net-shaped framework.
6. A connecting pipe fitting of the double reinforced all-steel spiral line polyethylene composite pipe material according to any one of claims 1 to 5, comprising a double reinforced electric hot melt pipe fitting, wherein the double reinforced electric hot melt pipe fitting comprises a polyethylene layer and a reinforced skeleton layer arranged inside the polyethylene, an insertion region is arranged at the end part of the polyethylene layer, the caliber of the insertion region is larger than the external diameter of the composite pipe material, the insertion region comprises a melting region and a non-heating region arranged at the end part, an electric fuse is arranged on the inner side wall of the melting region, the electric fuse penetrates through the polyethylene layer to be connected with a binding post arranged outside, and an insulating layer is coated outside the polyethylene layer.
7. The connecting pipe fitting of the double-reinforced all-steel spiral polyethylene composite pipe as claimed in claim 6, wherein the reinforcing frame is made of fiber, steel wire or steel plate, and the reinforcing frame layer is formed by compounding the polyethylene layer with the bonding resin.
8. A connecting tube of dual reinforced all steel helical wire polyethylene composite tubing according to claim 6, characterized in that the length of the non-heated zone is less than or equal to 5mm.
9. A connecting pipe fitting of the dual reinforced all-steel spiral polyethylene composite pipe material as claimed in any one of claims 1 to 5, comprising a dual reinforced metal connecting pipe fitting, wherein the dual reinforced metal connecting pipe fitting comprises two sets of inner taper sleeves and flanges, the inner taper sleeves are provided with taper holes, the taper holes are provided with thread grooves for being in threaded connection with the connecting region of the composite pipe material, the flanges are arranged between the two inner taper sleeves and fixedly connected through bolts and nuts, a connecting member penetrating through the interior of the dual reinforced connecting pipe fitting is arranged between the two sets of inner taper sleeves, and both ends of the connecting member penetrate through the end portions of the flanges.
10. A connecting pipe fitting of the double reinforced all-steel spiral wire polyethylene composite pipe material as claimed in claim 9, wherein the inner taper sleeve is made of carbon steel + galvanized steel, carbon steel + IPN8710 anticorrosive material or 316 stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211565229.0A CN115949806A (en) | 2022-12-07 | 2022-12-07 | Double-reinforced all-steel spiral-line polyethylene composite pipe and connecting pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211565229.0A CN115949806A (en) | 2022-12-07 | 2022-12-07 | Double-reinforced all-steel spiral-line polyethylene composite pipe and connecting pipe fitting |
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| CN115949806A true CN115949806A (en) | 2023-04-11 |
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| CN202211565229.0A Pending CN115949806A (en) | 2022-12-07 | 2022-12-07 | Double-reinforced all-steel spiral-line polyethylene composite pipe and connecting pipe fitting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116753368A (en) * | 2023-08-09 | 2023-09-15 | 浙江大学 | Composite pipe capable of preventing hydrogen permeation bulge, design method of composite pipe and hydrogen transmission pipe network |
-
2022
- 2022-12-07 CN CN202211565229.0A patent/CN115949806A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116753368A (en) * | 2023-08-09 | 2023-09-15 | 浙江大学 | Composite pipe capable of preventing hydrogen permeation bulge, design method of composite pipe and hydrogen transmission pipe network |
| CN116753368B (en) * | 2023-08-09 | 2024-01-16 | 浙江大学 | Composite pipe capable of preventing hydrogen permeation bulge, design method of composite pipe and hydrogen transmission pipe network |
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