CN113154142A - Steel skeleton plastic pipe composite pipe and production process thereof - Google Patents
Steel skeleton plastic pipe composite pipe and production process thereof Download PDFInfo
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- CN113154142A CN113154142A CN202110290863.7A CN202110290863A CN113154142A CN 113154142 A CN113154142 A CN 113154142A CN 202110290863 A CN202110290863 A CN 202110290863A CN 113154142 A CN113154142 A CN 113154142A
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- layer pipe
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 210
- 239000010959 steel Substances 0.000 title claims abstract description 210
- 229920003023 plastic Polymers 0.000 title claims abstract description 86
- 239000004033 plastic Substances 0.000 title claims abstract description 86
- 239000002131 composite material Substances 0.000 title claims abstract description 65
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 229920000098 polyolefin Polymers 0.000 claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000004804 winding Methods 0.000 claims description 21
- -1 polyethylene Polymers 0.000 claims description 14
- 239000004698 Polyethylene Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 229920000573 polyethylene Polymers 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 12
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000008021 deposition Effects 0.000 abstract description 3
- 238000007493 shaping process Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 9
- 239000002184 metal Substances 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a steel skeleton plastic pipe composite pipe and a production process thereof. The composite pipe comprises an inner layer pipe, an outer layer pipe, warp steel wires and weft steel wires, wherein the warp steel wires are inserted into the inner layer pipe in a warp direction, the weft steel wires are wound and welded on the outer wall of the inner layer pipe, and the outer layer pipe is wrapped outside the weft steel wires; the steel skeleton plastic composite pipe is prepared by adopting a two-step method, the inner surface of the prepared steel skeleton plastic composite pipe is smoother than the inner wall of a steel pipe by using an internal shaping process, the absolute equivalent roughness of the inner wall of the composite pipe is 0.01mm, and the conveying capacity under the same condition is obviously improved compared with that of the steel pipe; the polyolefin is extruded on the outer surface of the heated inner layer pipe in a vacuum environment, so that the poor interface bonding performance caused by air between the inner layer pipe and the outer layer pipe can be avoided, and the bonding degree of a contact interface between the outer layer pipe and the inner layer pipe can be improved by heating. The composite pipe prepared by the invention has the advantages of smoothness, wear resistance, small conveying resistance, no scale formation and no wax deposition, and has extremely good practicability.
Description
Technical Field
The invention relates to the technical field of plastic composite pipes, in particular to a steel skeleton plastic pipe composite pipe and a production process thereof.
Background
The pipe has various types, wherein the most important of the pipe is a metal pipe and a plastic pipe, the two types of pipes are different in thousands of autumn, the metal pipe has good wear resistance, high tensile strength, good impact resistance and good mechanical property, but the metal pipe also has the defects of large weight and corrosion resistance; the plastic pipe is light in weight and good in corrosion resistance, mechanical properties of the plastic pipe are much poorer than those of a metal pipe, and at present, the main trend of the pipe is to combine the metal pipe and the plastic pipe to realize complementary performance.
The compound pipe of production on present market welds into the tubulose steel wire framework net through the steel wire earlier through the latitudinal direction, as the reinforcing phase of plastic tubing, then extrudes and covers outer plastic layer, wraps up the steel wire framework net, makes the inlayer plastic layer, nevertheless because the steel wire net check is crowded and is covering in-process atress inequality, rocks the deformation easily, and in addition, the wall thickness of inlayer plastic layer that the inlayer plastic layer produced is not even at the infiltration in-process.
The invention discloses a steel skeleton plastic composite pipe and a production process thereof to solve the problems.
Disclosure of Invention
The invention aims to provide a steel skeleton plastic pipe composite pipe and a production process thereof, which aim to solve the problems in the background art.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a compound pipe of steel skeleton plastic tubing, compound pipe includes inlayer pipe, outer pipe, warp direction steel wire and latitudinal direction steel wire, the warp direction steel wire warp direction is inserted in the inlayer pipe, latitudinal direction steel wire lap welding is in inlayer outside of tubes, outer pipe cladding is outside at the latitudinal direction steel wire.
Further, the inner layer pipe and the outer layer pipe are made of polyolefin.
Further, the polyolefin is any one of polyethylene and polypropylene.
Furthermore, the warp-wise steel wires are inserted into the inner-layer pipe in a warp-wise manner, and the warp-wise steel wires pass through the central shaft of the inner-layer pipe; the latitudinal steel wire is in the outer surface of the inner tube in a winding welding mode, and the latitudinal steel wire is in the winding welding mode along the intersection point of the longitudinal steel wire and the outer wall of the inner tube.
Furthermore, when the warp-wise steel wires are inserted into the inner layer pipe, the distance between every two steel wires is 1-5 mm; and when the latitudinal steel wires are subjected to the girth welding, the distance between every two steel wires is the same as that between every two steel wires.
A production process of a steel skeleton plastic composite pipe comprises the following steps:
s1: preparing an inner layer pipe;
s2: the inner tube is inserted with warp steel wires, and the outer wall is wound with weft steel wires:
s3: and coating the outer surface of the inner-layer pipe to obtain the steel skeleton plastic composite pipe.
Further, the step S1:
the polyolefin is melted and extruded to prepare an inner layer pipe;
further, the step S2:
the longitudinal steel wires are inserted into the inner-layer pipe in a longitudinal mode, the inner-layer pipe is cut into required lengths as required through the central shaft of the inner-layer pipe, the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode through a seam welder, and the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode along the intersection points of the longitudinal steel wires and the outer wall of the inner-layer pipe;
further, the step S3:
and (3) placing the inner-layer tube processed in the S2 mode in a vacuum environment, carrying out high-frequency heating, extruding and covering the molten polyolefin on the outer surface of the inner-layer tube, and covering the inner-layer tube and the weft steel wires to form an outer-layer tube, so that the steel skeleton plastic composite tube is manufactured.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a steel skeleton plastic pipe composite pipe and a production process thereof. The steel skeleton plastic composite pipe prepared by the invention is different from the traditional process, the steel wire is welded into a tubular steel skeleton net along the longitude and latitude directions of the pipe, then an outer plastic layer is extruded and coated, the inner plastic layer is extruded and coated by the outer plastic layer and is penetrated by a grid, and the tubular steel skeleton net is coated to prepare the composite pipe;
firstly, polyolefin is melted and extruded to prepare an inner layer pipe, then warp-wise steel wires are inserted into the inner layer pipe in a warp-wise manner, the warp-wise steel wires pass through the central shaft of the inner layer pipe, then weft-wise steel wires are welded on the outer wall of the inner layer pipe in a winding manner by a seam welder, the weft-wise steel wires are welded around the intersection points of the warp-wise steel wires and the outer wall of the inner layer pipe, the inner layer pipe with the warp-wise steel wires inserted and the weft-wise steel wires welded in the winding manner is placed in a vacuum environment, high-frequency heating is carried out, then the melted polyolefin is extruded and coated on the outer surface of the inner layer pipe, the inner layer pipe and the weft-wise steel wires are coated, and an outer layer pipe is formed, so that the steel skeleton plastic composite pipe is prepared;
the steel skeleton plastic composite pipe is prepared by adopting a two-step method, the inner surface of the prepared steel skeleton plastic composite pipe is smoother than the inner wall of a steel pipe by using an internal shaping process, the absolute equivalent roughness of the inner wall of the composite pipe is 0.01mm, and the conveying capacity under the same condition is obviously improved compared with that of the steel pipe; the inner layer tube is arranged in a vacuum environment, so that the interface bonding performance caused by air between the inner layer tube and the outer layer tube can be avoided, and the bonding degree of the contact interface between the outer layer tube and the inner layer tube can be improved by heating the inner layer tube at high frequency. The composite pipe prepared by the invention has the advantages of smoothness, wear resistance, small conveying resistance, no scale formation and no wax deposition, and has extremely good practicability.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A production process of a steel skeleton plastic composite pipe comprises the following steps:
s1: preparing an inner layer pipe;
s2: the inner tube is inserted with warp steel wires, and the outer wall is wound with weft steel wires:
s3: and coating the outer surface of the inner-layer pipe to obtain the steel skeleton plastic composite pipe.
Wherein, S1:
the polyolefin is melted and extruded to prepare an inner layer pipe;
wherein, S2:
the longitudinal steel wires are inserted into the inner-layer pipe in a longitudinal mode, the inner-layer pipe is cut into required lengths as required through the central shaft of the inner-layer pipe, the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode through a seam welder, and the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode along the intersection points of the longitudinal steel wires and the outer wall of the inner-layer pipe;
wherein, S3:
and (3) placing the inner-layer tube processed in the S2 mode in a vacuum environment, carrying out high-frequency heating, extruding and covering the molten polyolefin on the outer surface of the inner-layer tube, and covering the inner-layer tube and the weft steel wires to form an outer-layer tube, so that the steel skeleton plastic composite tube is manufactured.
Wherein the polyolefin is polyethylene.
Wherein, the interval between every steel wire of warp direction steel wire is 1 mm.
Wherein, the interval between every steel wire of being wound of latitudinal direction steel wire is 1 mm.
Example 2
A production process of a steel skeleton plastic composite pipe comprises the following steps:
s1: preparing an inner layer pipe;
s2: the inner tube is inserted with warp steel wires, and the outer wall is wound with weft steel wires:
s3: and coating the outer surface of the inner-layer pipe to obtain the steel skeleton plastic composite pipe.
Wherein, S1:
the polyolefin is melted and extruded to prepare an inner layer pipe;
wherein, S2:
the longitudinal steel wires are inserted into the inner-layer pipe in a longitudinal mode, the inner-layer pipe is cut into required lengths as required through the central shaft of the inner-layer pipe, the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode through a seam welder, and the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode along the intersection points of the longitudinal steel wires and the outer wall of the inner-layer pipe;
wherein, S3:
and (3) placing the inner-layer tube processed in the S2 mode in a vacuum environment, carrying out high-frequency heating, extruding and covering the molten polyolefin on the outer surface of the inner-layer tube, and covering the inner-layer tube and the weft steel wires to form an outer-layer tube, so that the steel skeleton plastic composite tube is manufactured.
Wherein the polyolefin is polyethylene.
Wherein, the interval between every steel wire of warp direction steel wire is 2 mm.
Wherein, the interval between every steel wire of being wound of latitudinal direction steel wire is 2 mm.
Example 3
A production process of a steel skeleton plastic composite pipe comprises the following steps:
s1: preparing an inner layer pipe;
s2: the inner tube is inserted with warp steel wires, and the outer wall is wound with weft steel wires:
s3: and coating the outer surface of the inner-layer pipe to obtain the steel skeleton plastic composite pipe.
Wherein, S1:
the polyolefin is melted and extruded to prepare an inner layer pipe;
wherein, S2:
the longitudinal steel wires are inserted into the inner-layer pipe in a longitudinal mode, the inner-layer pipe is cut into required lengths as required through the central shaft of the inner-layer pipe, the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode through a seam welder, and the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode along the intersection points of the longitudinal steel wires and the outer wall of the inner-layer pipe;
wherein, S3:
and (3) placing the inner-layer tube processed in the S2 mode in a vacuum environment, carrying out high-frequency heating, extruding and covering the molten polyolefin on the outer surface of the inner-layer tube, and covering the inner-layer tube and the weft steel wires to form an outer-layer tube, so that the steel skeleton plastic composite tube is manufactured.
Wherein the polyolefin is polyethylene.
Wherein, the interval between every steel wire of warp direction steel wire is 3 mm.
Wherein, the interval between every steel wire of winding of latitudinal direction steel wire is 3 mm.
Example 4
A production process of a steel skeleton plastic composite pipe comprises the following steps:
s1: preparing an inner layer pipe;
s2: the inner tube is inserted with warp steel wires, and the outer wall is wound with weft steel wires:
s3: and coating the outer surface of the inner-layer pipe to obtain the steel skeleton plastic composite pipe.
Wherein, S1:
the polyolefin is melted and extruded to prepare an inner layer pipe;
wherein, S2:
the longitudinal steel wires are inserted into the inner-layer pipe in a longitudinal mode, the inner-layer pipe is cut into required lengths as required through the central shaft of the inner-layer pipe, the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode through a seam welder, and the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode along the intersection points of the longitudinal steel wires and the outer wall of the inner-layer pipe;
wherein, S3:
and (3) placing the inner-layer tube processed in the S2 mode in a vacuum environment, carrying out high-frequency heating, extruding and covering the molten polyolefin on the outer surface of the inner-layer tube, and covering the inner-layer tube and the weft steel wires to form an outer-layer tube, so that the steel skeleton plastic composite tube is manufactured.
Wherein the polyolefin is polyethylene.
Wherein, the interval between every steel wire of warp direction steel wire is 4 mm.
Wherein, the interval between every steel wire of being wound of latitudinal direction steel wire is 4 mm.
Example 5
A production process of a steel skeleton plastic composite pipe comprises the following steps:
s1: preparing an inner layer pipe;
s2: the inner tube is inserted with warp steel wires, and the outer wall is wound with weft steel wires:
s3: and coating the outer surface of the inner-layer pipe to obtain the steel skeleton plastic composite pipe.
Wherein, S1:
the polyolefin is melted and extruded to prepare an inner layer pipe;
wherein, S2:
the longitudinal steel wires are inserted into the inner-layer pipe in a longitudinal mode, the inner-layer pipe is cut into required lengths as required through the central shaft of the inner-layer pipe, the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode through a seam welder, and the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode along the intersection points of the longitudinal steel wires and the outer wall of the inner-layer pipe;
wherein, S3:
and (3) placing the inner-layer tube processed in the S2 mode in a vacuum environment, carrying out high-frequency heating, extruding and covering the molten polyolefin on the outer surface of the inner-layer tube, and covering the inner-layer tube and the weft steel wires to form an outer-layer tube, so that the steel skeleton plastic composite tube is manufactured.
Wherein the polyolefin is polyethylene.
Wherein, the interval between every steel wire of warp direction steel wire is 5 mm.
Wherein, the interval between every steel wire of being wound of latitudinal direction steel wire is 5 mm.
Comparative example 1
A production process of a steel skeleton plastic composite pipe comprises the following steps:
s1: preparing a steel wire tubular grid;
s2: and extruding and coating the molten polyolefin on the steel wire tubular grid, and permeating to obtain an inner layer to obtain the steel skeleton plastic composite pipe.
Wherein, S1:
welding steel wires into steel wire tubular grids according to the longitude and latitude directions of the pipe;
wherein, S2:
and extruding and covering molten polyolefin on the steel wire tubular grid to prepare an outer plastic layer, penetrating the outer plastic layer into the grid to form an inner plastic layer, and covering the tubular grid to prepare the steel skeleton plastic composite pipe.
Wherein the polyolefin is polyethylene.
Wherein, the interval between the warp direction steel wire is 1 mm.
Wherein, the interval between the latitudinal direction steel wire is 1 mm.
Comparative example 2
A production process of a steel skeleton plastic composite pipe comprises the following steps:
s1: preparing a steel wire tubular grid;
s2: and extruding and coating the molten polyolefin on the steel wire tubular grid, and permeating to obtain an inner layer to obtain the steel skeleton plastic composite pipe.
Wherein, S1:
welding steel wires into steel wire tubular grids according to the longitude and latitude directions of the pipe;
wherein, S2:
and extruding and covering molten polyolefin on the steel wire tubular grid to prepare an outer plastic layer, penetrating the outer plastic layer into the grid to form an inner plastic layer, and covering the tubular grid to prepare the steel skeleton plastic composite pipe.
Wherein the polyolefin is polyethylene.
Wherein, the interval between the warp direction steel wire is 2 mm.
Wherein, the interval between the latitudinal direction steel wire is 2 mm.
Comparative example 3
A production process of a steel skeleton plastic composite pipe comprises the following steps:
s1: preparing a steel wire tubular grid;
s2: and extruding and coating the molten polyolefin on the steel wire tubular grid, and permeating to obtain an inner layer to obtain the steel skeleton plastic composite pipe.
Wherein, S1:
welding steel wires into steel wire tubular grids according to the longitude and latitude directions of the pipe;
wherein, S2:
and extruding and covering molten polyolefin on the steel wire tubular grid to prepare an outer plastic layer, penetrating the outer plastic layer into the grid to form an inner plastic layer, and covering the tubular grid to prepare the steel skeleton plastic composite pipe.
Wherein the polyolefin is polyethylene.
Wherein, the interval between the warp direction steel wire is 3 mm.
Wherein, the interval between the latitudinal direction steel wire is 3 mm.
Comparative example 4
A production process of a steel skeleton plastic composite pipe comprises the following steps:
s1: preparing a steel wire tubular grid;
s2: and extruding and coating the molten polyolefin on the steel wire tubular grid, and permeating to obtain an inner layer to obtain the steel skeleton plastic composite pipe.
Wherein, S1:
welding steel wires into steel wire tubular grids according to the longitude and latitude directions of the pipe;
wherein, S2:
and extruding and covering molten polyolefin on the steel wire tubular grid to prepare an outer plastic layer, penetrating the outer plastic layer into the grid to form an inner plastic layer, and covering the tubular grid to prepare the steel skeleton plastic composite pipe.
Wherein the polyolefin is polyethylene.
Wherein, the interval between the warp direction steel wire is 4 mm.
Wherein, the interval between the latitudinal direction steel wire is 4 mm.
Comparative example 5
A production process of a steel skeleton plastic composite pipe comprises the following steps:
s1: preparing a steel wire tubular grid;
s2: and extruding and coating the molten polyolefin on the steel wire tubular grid, and permeating to obtain an inner layer to obtain the steel skeleton plastic composite pipe.
Wherein, S1:
welding steel wires into steel wire tubular grids according to the longitude and latitude directions of the pipe;
wherein, S2:
and extruding and covering molten polyolefin on the steel wire tubular grid to prepare an outer plastic layer, penetrating the outer plastic layer into the grid to form an inner plastic layer, and covering the tubular grid to prepare the steel skeleton plastic composite pipe.
Wherein the polyolefin is polyethylene.
Wherein, the interval between the warp direction steel wire is 5 mm.
Wherein, the interval between the latitudinal direction steel wire is 5 mm.
Experiment one
The test samples of examples 1 to 5 and comparative examples 1 to 5 were used to detect the stability of cracking under pressure of the test samples according to CJ/T189-.
Experiment two
The samples of examples 1 to 5 and comparative examples 1 to 5 were used as experimental samples, and the internal pressure resistance of the samples was measured and recorded according to GB/T6111-.
Experimental data
Data analysis
The data show that the fracturing conditions and the pressure resistance of the examples 1 to 5 are superior to those of the comparative examples 1 to 5;
compare in embodiment 1 ~ 5, what comparative example 1 ~ 5 adopted is traditional technology, prepares steel wire framework net earlier, and outer plastic layer is refabricated, extrudes to cover and obtains the inlayer plastic layer, and the composite tube wall thickness that prepares like this is different, and the performance is poor.
In conclusion, the composite pipe prepared by the invention has the advantages of smoothness, wear resistance, small conveying resistance, no scale formation and no wax deposition, and has excellent practicability.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. 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 (7)
1. A steel skeleton plastic pipe composite pipe is characterized in that: the composite pipe comprises an inner layer pipe, an outer layer pipe, warp steel wires and weft steel wires, wherein the warp steel wires are inserted into the inner layer pipe in a warp mode, the weft steel wires are wound and welded on the outer wall of the inner layer pipe, and the outer layer pipe is wrapped outside the weft steel wires.
2. The steel-frame plastic composite pipe according to claim 1, wherein: the inner layer pipe and the outer layer pipe are made of polyolefin.
3. The steel-frame plastic composite pipe according to claim 2, wherein: the polyolefin is any one of polyethylene and polypropylene.
4. The steel-frame plastic composite pipe according to claim 1, wherein: the longitudinal steel wires are inserted into the inner-layer pipe in a longitudinal direction and pass through a central shaft of the inner-layer pipe; the latitudinal steel wire is in the outer surface of the inner tube in a winding welding mode, and the latitudinal steel wire is in the winding welding mode along the intersection point of the longitudinal steel wire and the outer wall of the inner tube.
5. The steel-frame plastic composite pipe according to claim 4, wherein: when the warp-wise steel wires are inserted into the inner layer pipe, the distance between every two steel wires is 1-5 mm; and when the latitudinal steel wires are subjected to the girth welding, the distance between every two steel wires is the same as that between every two steel wires.
6. A production process of a steel skeleton plastic composite pipe is characterized by comprising the following steps:
the method comprises the following steps:
s1: preparing an inner layer pipe;
s2: the inner tube is inserted with warp steel wires, and the outer wall is wound with weft steel wires:
s3: and coating the outer surface of the inner-layer pipe to obtain the steel skeleton plastic composite pipe.
7. The production process of the steel skeleton plastic composite pipe as claimed in claim 6, wherein the production process comprises the following steps:
the S1:
the polyolefin is melted and extruded to prepare an inner layer pipe;
the S2:
the longitudinal steel wires are inserted into the inner-layer pipe in a longitudinal mode, the inner-layer pipe is cut into required lengths as required through the central shaft of the inner-layer pipe, the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode through a seam welder, and the latitudinal steel wires are welded with the outer wall of the inner-layer pipe in a winding mode along the intersection points of the longitudinal steel wires and the outer wall of the inner-layer pipe;
the S3:
and (3) placing the inner-layer tube processed in the S2 mode in a vacuum environment, carrying out high-frequency heating, extruding and covering the molten polyolefin on the outer surface of the inner-layer tube, and covering the inner-layer tube and the weft steel wires to form an outer-layer tube, so that the steel skeleton plastic composite tube is manufactured.
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| CN202110290863.7A CN113154142A (en) | 2021-03-18 | 2021-03-18 | Steel skeleton plastic pipe composite pipe and production process thereof |
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| CN202110290863.7A CN113154142A (en) | 2021-03-18 | 2021-03-18 | Steel skeleton plastic pipe composite pipe and production process thereof |
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| CN2818981Y (en) * | 2005-09-03 | 2006-09-20 | 淄博恒和塑胶有限公司 | Steel wire reinforced polythene composite piping material under coal mine |
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