CN219655472U - Steel wire reinforced polyethylene winding pipe for pipe pulling construction - Google Patents
Steel wire reinforced polyethylene winding pipe for pipe pulling construction Download PDFInfo
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- CN219655472U CN219655472U CN202320503131.6U CN202320503131U CN219655472U CN 219655472 U CN219655472 U CN 219655472U CN 202320503131 U CN202320503131 U CN 202320503131U CN 219655472 U CN219655472 U CN 219655472U
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- Prior art keywords
- pipe
- reinforced
- base layer
- steel wire
- winding
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- 238000004804 winding Methods 0.000 title claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 28
- -1 polyethylene Polymers 0.000 title claims abstract description 28
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 31
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 239000012943 hotmelt Substances 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 16
- 239000012790 adhesive layer Substances 0.000 claims description 10
- 239000004831 Hot glue Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000004705 High-molecular-weight polyethylene Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The utility model discloses a steel wire reinforced polyethylene winding pipe for pipe pulling construction, which comprises a base layer pipe wall formed by spirally winding and hot melting pressing base layer strips, wherein steel wires with the same direction as the strips are embedded in the base layer strips formed by extrusion molding; the reinforced pipe wall comprises a reinforced rib close to the base layer strip, and further comprises a reinforced strip wound on the reinforced rib in a hot-melt pressing manner; the outer surface of the reinforced pipe wall is a non-convex reinforcing rib and approximately smooth outer surface. The utility model has the beneficial effects that: the pressure bearing and the ring rigidity of the winding pipe are high; the flexibility is good; the fused pipe walls are butted, so that the requirements of high longitudinal tensile strength and thin wall thickness of the winding pipe are met; the outer surface of the winding pipe is free of convex ribs and is approximately smooth, so that friction resistance in the advancing process of the pulling pipe can be reduced.
Description
Technical Field
The utility model relates to the technical field of pipe processing, in particular to a steel wire reinforced polyethylene winding pipe for pipe drawing construction.
Background
The pipe plays an increasingly important role in the water supply and drainage field. Pipeline laying in projects often requires overcoming barriers to the geographical environment, such as crossing under culverts, highways, railways or important buildings, as well as rivers, hills, etc.
In construction, the pipe is laid by adopting a pipe jacking technology in the past, namely, the pipe to be laid is hard jacked into according to a design angle by means of jacking equipment (generally, the pipe with high rigidity). This tends to be energy and cost intensive. A recently developed culvert pipe pulling technique utilizes a directional pulling machine to first drill a culvert below the ground and then pull the tubing therethrough. As the directional drawing machine technology is mature, the construction difficulty of the pipe drawing technology is smaller than that of the pipe jacking technology, and the energy consumption is relatively lower.
For implementing the tube drawing technology, the tube (for short, the tube drawing) should meet specific performance requirements, firstly, the tube drawing should bear enough tension in the axial direction, especially when the culvert is long; secondly, the outer surface of the pull pipe is as smooth as possible, and the friction force between the pull pipe and surrounding slurry soil is small, so that the required pulling force and the energy consumption are reduced; thirdly, the pull tube has quite flexibility and bendability, and can be bent along with bending of the pull tube in the culvert; fourthly, the pull pipe can meet the engineering requirements of pipeline users, in particular to the requirements of high-pressure and large-caliber pipelines.
The common polyethylene extruded tube is not problematic in general cases, but the polyethylene extruded tube is not suitable for use in both cases, firstly, the extruded tube is used as a water supply tube, and the water pressure is relatively high, because the tensile strength of the polyethylene is limited, the tube wall is required to be very thick at this time, or the engineering requires the ring stiffness of the tube to be very high, and the tube wall is required to be very thick, so that the tube cost is too high, the cost is not effective, the drawn tube is heavy, and great traction force and energy equipment consumption are required; the second condition is that engineering needs the pipe diameter of the pipe to be large, and the polyethylene direct extrusion pipe is limited by factors such as a die and cannot meet the requirement.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide a steel wire reinforced polyethylene winding pipe for pipe drawing construction, which is improved aiming at the construction requirement of a large-caliber pipe drawing on the basis of the prior art, and adopts the following technical scheme: the utility model provides a steel wire reinforced polyethylene winding pipe for drawing pipe construction which characterized in that: the winding pipe comprises a base layer pipe wall formed by spirally winding and hot-melting pressing base layer strips, and steel wires with the same direction as the base layer strips are embedded in the base layer strips formed by extrusion molding; the reinforced pipe wall comprises a reinforced rib close to the base layer strip, and further comprises a reinforced strip spirally wound and hot-melt pressed on the reinforced rib; the outer surface of the reinforced pipe wall is a non-convex reinforcing rib and approximately smooth outer surface. The winding pipe not only avoids the problems that the polyethylene pipe processed by extrusion molding is limited by the size of a die and the caliber is limited, but also has the advantages of high pressure bearing and ring rigidity.
In the material selection, the base layer strips and the reinforcing strips are made of polyethylene materials.
The whole width of strengthening rib is equivalent with the width of winding pipe, the strengthening rib includes many steel wires of parallel arrangement. Other reinforcing bars can be used, such as reinforcing bars comprising a plurality of glass fibers arranged in parallel, and the surfaces of the reinforcing bars are covered with an adhesive layer.
Considering compactness after combination, the steel wire is a carbon spring steel wire with copper plated on the surface, and the surface of the steel wire is covered with an adhesive layer.
In the design of the strip edge, an upper step is formed at one side edge of the base layer strip, a lower step is formed at the other side edge of the base layer strip, the upper step and the lower step of the adjacent edge in spiral winding are embedded, and a hot melt adhesive material is extruded between the upper step and the lower step to form the base layer pipe wall. Or the edges of the reinforced strip are slope edges, and hot melt adhesive materials are extruded between adjacent edges in spiral winding and then the reinforced pipe wall is formed by extrusion.
The utility model has the beneficial effects that: 1) The pressure bearing and the ring rigidity of the winding pipe are high: by distributing 2 layers of reinforced steel wires in the pipe wall, the tensile strength of the steel wires is about 2000MPa, which is about 100 times that of polyethylene materials, and the bearing capacity of the pipe is very strong; the elastic modulus of the steel wire is over 300 times that of polyethylene material, and the steel wire is distributed in 2 layers in a three-dimensional way, and obvious space intervals and material supports are arranged between the two layers, which is equivalent to the obvious increase of the wall thickness of a winding pipe, so that the ring stiffness of the pipe which is proportional to the 3 rd power of the wall thickness of the pipe is greatly increased, and the engineering requirement is met.
2) The flexibility is good: polyethylene tubing has good flexibility and bendability. While the steel wire is spirally wound like a spring, the longitudinal stretchability and the bendability of the pipe are hardly affected. The bending radius of the pipeline is about 30 times or even lower than the diameter of the pipe, and the pipeline can be bent in the culvert and other environments along with a puller, thereby meeting the requirement of being used as a pulling pipe.
3) The fused pipe walls are butted, and the requirements of high longitudinal tensile strength and thin wall thickness of the winding pipe are met.
4) The outer surface of the winding pipe is free of convex ribs and is approximately smooth, so that friction resistance in the advancing process of the pulling pipe can be reduced.
Drawings
Fig. 1 is a schematic diagram of the structure of the utility model, and fig. 2 is a schematic diagram of the processing technology of the utility model. Wherein 1 is a base pipe wall, 11 is a base strip, 111 is a reinforcing rib, 2 is a reinforcing pipe wall, 21 is a reinforcing rib, 22 is a reinforcing strip, 3 is an adhesive layer, 4 is an upper step, 5 is a lower step, and 6 is a press roll.
Detailed Description
The following describes specific embodiments of the present utility model with reference to the drawings.
The utility model discloses a steel wire reinforced polyethylene winding pipe for pipe pulling construction, which comprises a base pipe wall 1 formed by winding and hot melting and pressing base strips 11 and a reinforced pipe wall 2 combined outside the base pipe wall 1. The base layer strip 11 has reinforcing ribs 111 embedded therein, and the reinforcing ribs 111 may be steel wires, glass fibers, or the like. The reinforced pipe wall 2 comprises reinforcing ribs 21 and also comprises a reinforced strip 22 wound on the reinforcing ribs 21 in a hot-melt press fit manner, and the outer surface (namely the outer circumferential surface) of the reinforced pipe wall 2 is a non-convex reinforcing rib and approximately smooth outer surface.
The base layer strip 11 and the reinforcing strip 22 of the present wound tube are both polyethylene materials, which may be high molecular weight polyethylene materials, etc.
The reinforcing rib 21 of the winding pipe can be made of a plurality of steel wires which are arranged in parallel, the steel wires are carbon spring steel wires with copper plated surfaces, the surfaces of the steel wires are covered with adhesive layers, and also can be made of a plurality of glass fibers which are arranged in parallel, and the surfaces of the glass fibers are covered with the adhesive layers. The adhesive layer is selected to adhere to metal, such as copper, and to be hot melt adhered to polyethylene, and the adhesive layer may be covered with a "laminator".
The edge of one side of the base layer strip 11 and/or the reinforcing strip 22 forms an upper step 4, the edge of the other side forms a lower step 5, and the upper step 4 and the lower step 5 of the adjacent edges are embedded (simply called steps) in the winding of the base layer strip 11 or the reinforcing strip 22, and are extruded to form the base layer pipe wall 1 after hot melt adhesive materials are extruded between the upper steps 4 and the lower steps 5. Alternatively, the edges of base layer web 11 and/or reinforcing web 22 may be beveled edges, with hot melt adhesive material being extruded between adjacent edges in the spiral wrap to form reinforcing tube wall 2. In summary, the purpose of the step-type bonding or the slope-type bonding is to enhance the bonding tightness between adjacent winding strips, thereby meeting the requirement of high axial tensile strength of the winding pipe.
Fig. 2 shows a process for manufacturing the winding pipe, wherein a base layer strip 11 with a reinforcing rib 111 is extruded by an extruder, and the outer edge of one side is an upper step 4 and the outer edge of the other side is a lower step 5; when the extruded base band 11 is spirally wound, the upper steps 4 and the outer steps 5 of adjacent edges are embedded, and hot melt and adhesive materials are extruded in the middle to form an adhesive layer 3, so that the adjacent bands are integrated to form a base band wall 1; above the base pipe wall 1, reinforcing ribs 21 (such as a plurality of steel wires or glass fibers arranged in parallel) are spirally wound; a layer of spiral wound polyethylene material with equal width is extruded and covered on the reinforcing rib to form a reinforcing strip 22, and adjacent reinforcing strips 22 are combined in a slope mode and are bonded in a hot melting mode, and finally the winding pipe is formed.
And (3) construction case description:
the pipe diameter of the winding pipe is 800mm, the wall thickness of the first 4 sections of winding pipes is increased to 38mm, the wall thickness is 28mm later, the length of the pipeline is 312m, and the pulling force of the pipeline stretching equipment is 80 tons.
The tensile strength of the pipe wall is 19MPa, the wall thickness of the first 4 sections of pipes is 38mm, and the bearable tensile force of the pipe wall is:
this value is the ultimate tensile force. If calculated by using the polyethylene hydrostatic design coefficient of 10MPa, the tensile force of 97 tons can be born, and the tensile force is greater than 80 tons of the pulling machine equipment.
The ultimate tensile force that can be borne by the pipe with the thickness of 28mm on the rear wall is 136 tons, and the safety tensile force is 72 tons.
The 312m pipeline is towed from the pulldown tunnel. The weight of the pipeline is about:
w=800× 3.1416 ×28×1.3×312/1000=28543 (kg) ≡28.5 (ton)
The total friction coefficient between the pipe and the surrounding slurry soil is taken to be 2, so that the friction resistance is
f=28.5x2=57 (ton)
I.e. the pipeline can fully withstand the corresponding pulling forces.
The pipe wall of the previous sections of pipe is thickened to ensure that the ring rigidity of the corresponding pipe reaches 20kN/m 2 The above can also withstand the shrinkage effects of the corresponding poisson effect.
In the engineering, auxiliary measures such as a drawing belt and a roller under the pipe are not adopted in practice, and the safety and the reliability of construction can be improved by the way of the drawing belt and the roller under the pipe when necessary in construction.
Of course, the above description is not intended to limit the utility model, but rather the utility model is not limited to the above examples, and variations, modifications, additions or substitutions within the spirit and scope of the utility model will be within the scope of the utility model.
Claims (7)
1. The utility model provides a steel wire reinforced polyethylene winding pipe for drawing pipe construction which characterized in that: the winding pipe comprises a base layer pipe wall formed by spirally winding and hot-melting pressing base layer strips, and steel wires with the same direction as the base layer strips are embedded in the base layer strips formed by extrusion molding; the reinforced pipe wall comprises a reinforced rib close to the base layer strip, and further comprises a reinforced strip wound on the reinforced rib in a hot-melt pressing manner; the outer surface of the reinforced pipe wall is a non-convex reinforcing rib and approximately smooth outer surface.
2. The steel wire reinforced polyethylene wound pipe for pipe drawing construction according to claim 1, wherein: the base layer strip and the reinforcing strip are both polyethylene materials.
3. The steel wire reinforced polyethylene wound pipe for pipe drawing construction according to claim 1, wherein: the reinforcing rib comprises a plurality of steel wires which are arranged in parallel.
4. A steel wire reinforced polyethylene wound pipe for pipe drawing construction according to claim 3, wherein: the steel wire is a carbon spring steel wire with copper plated on the surface, and an adhesive layer is covered on the surface of the steel wire.
5. The steel wire reinforced polyethylene wound pipe for pipe drawing construction according to claim 1, wherein: the reinforcing rib comprises a plurality of glass fibers which are arranged in parallel, and the surfaces of the reinforcing ribs are covered with an adhesive layer.
6. The steel wire reinforced polyethylene wound pipe for pipe drawing construction according to claim 1, wherein: the edge of one side of the base layer strip forms an upper step, the edge of the other side forms a lower step, the upper steps and the lower steps of the adjacent edges in spiral winding are embedded, and after hot melt adhesive materials are extruded between the upper steps and the lower steps, the base layer strip is extruded to form a base layer pipe wall.
7. The steel wire reinforced polyethylene wound pipe for pipe drawing construction according to claim 1, wherein: the edges of the reinforced strip are slope edges, and hot melt adhesive materials are extruded between adjacent edges in spiral winding and then are extruded to form the reinforced pipe wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320503131.6U CN219655472U (en) | 2023-03-10 | 2023-03-10 | Steel wire reinforced polyethylene winding pipe for pipe pulling construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320503131.6U CN219655472U (en) | 2023-03-10 | 2023-03-10 | Steel wire reinforced polyethylene winding pipe for pipe pulling construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219655472U true CN219655472U (en) | 2023-09-08 |
Family
ID=87857274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320503131.6U Active CN219655472U (en) | 2023-03-10 | 2023-03-10 | Steel wire reinforced polyethylene winding pipe for pipe pulling construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219655472U (en) |
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2023
- 2023-03-10 CN CN202320503131.6U patent/CN219655472U/en active Active
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