CN113606413B - Steel wire mesh skeleton polyethylene composite pipe end steel wire fixing and connecting structure and method - Google Patents
Steel wire mesh skeleton polyethylene composite pipe end steel wire fixing and connecting structure and method Download PDFInfo
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- CN113606413B CN113606413B CN202110886760.7A CN202110886760A CN113606413B CN 113606413 B CN113606413 B CN 113606413B CN 202110886760 A CN202110886760 A CN 202110886760A CN 113606413 B CN113606413 B CN 113606413B
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- steel wire
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- composite pipe
- polyethylene composite
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- 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/02—Welded joints; Adhesive joints
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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Abstract
The invention relates to the technical field of pipe connection, and particularly provides a steel wire mesh skeleton polyethylene composite pipe end steel wire fixing and connecting structure and method. The steel wire fixing structure of the end of the steel wire mesh skeleton polyethylene composite pipe is characterized in that an outer steel ring is nested at the end of the steel wire mesh skeleton polyethylene composite pipe, a circle of bulges are arranged at the edge of the outer steel ring, and the bulges are positioned at one side far away from the edge of the steel wire mesh skeleton polyethylene composite pipe; the end of the steel wire mesh skeleton polyethylene composite pipe is turned over to the outer steel ring, the turned over position extends to the bulge, and the inner steel ring is nested outside the turned over steel wire mesh skeleton polyethylene composite pipe. The problems that steel wires at the end parts of the polyethylene composite pipe with the steel wire mesh framework are easy to scatter, and a sealing gasket flange method is easy to leak and fall off in the connecting process in the prior art are solved; and the tightening degree of the bolts on the flange is required to be completely consistent, so that the operation is very difficult.
Description
Technical Field
The invention relates to the technical field of pipe connection, and particularly provides a steel wire mesh skeleton polyethylene composite pipe end steel wire fixing and connecting structure and method.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The steel wire mesh skeleton polyethylene composite pipe has excellent flexibility, is used in large scale in industrial field, and is suitable for water supply and gas pipeline system for long distance burying. At present, after a steel wire mesh skeleton polyethylene composite pipe is taken down, the end parts of steel wires scattered at the pipe ends are not fixed and are directly connected in an electrofusion or buckling mode, and the inventor finds that when the pressure of the product in the state is high in application working conditions, the steel wires are easy to draw, so that the performance of the product is invalid, and the pipeline is leaked.
In addition, when the steel wire mesh skeleton polyethylene composite pipe is connected in the prior art, the sealing gasket is usually used for sealing, and then the flange is used for fastening the sealing gasket, but the inventor discovers that on one hand, the sealing gasket flange method is poor in sealing performance and easy to leak, and on the other hand, in order to achieve the equal pressure of the joint part along the circumference, the sealing bolts on the flange are required to be completely consistent in tightening degree along the circumference, and the operation is very difficult.
Disclosure of Invention
Aiming at the problems that steel wires at the end parts of a steel wire mesh skeleton polyethylene composite pipe in the prior art are easy to scatter, and a sealing gasket flange method is easy to leak and fall off in the connecting process; and the tightening degree of the bolts on the flange is required to be completely consistent, so that the operation is very difficult.
In one or some embodiments of the invention, a steel wire fixing structure of a steel wire mesh skeleton polyethylene composite pipe end is provided, an inner steel ring is nested at the steel wire mesh skeleton polyethylene composite pipe end, a circle of bulges are arranged at the edge of the inner steel ring, and the bulges are positioned at one side far away from the edge of the steel wire mesh skeleton polyethylene composite pipe;
the end of the steel wire mesh skeleton polyethylene composite pipe is turned over to the inner steel ring, the turned over position extends to the bulge, and the outer steel ring is nested outside the turned over steel wire mesh skeleton polyethylene composite pipe.
In one or some embodiments of the invention, a steel wire mesh skeleton polyethylene composite pipe connecting structure is provided, wherein the end parts of two connected steel wire mesh skeleton polyethylene composite pipes are both the steel wire fixing structure for the end heads of the steel wire mesh skeleton polyethylene composite pipes, polyethylene layers at the turnover positions of the two steel wire mesh skeleton polyethylene composite pipes are welded in a melting way, and a plurality of connecting pieces are welded at the circumferential positions on an inner steel ring at the connecting positions.
In one or some embodiments of the present invention, a method for fixing an end steel wire of a polyethylene composite pipe with a steel wire mesh skeleton is provided, including the following steps: nesting an inner steel ring at the end part of the steel wire mesh skeleton polyethylene composite pipe, and folding the steel wire mesh skeleton polyethylene composite pipe towards the inner steel ring until the edge of the steel wire mesh skeleton polyethylene composite pipe contacts with the bulge of the inner steel ring 2; then the outer steel ring is nested outside the steel wire mesh skeleton polyethylene composite pipe.
In one or some embodiments of the present invention, a method for connecting a steel wire mesh skeleton polyethylene composite pipe is provided, and based on the method for fixing a steel wire at an end of the steel wire mesh skeleton polyethylene composite pipe, the following steps are performed:
carrying out hot melt fusion welding on polyethylene layers at the end parts of the two steel wire mesh skeleton polyethylene composite pipes;
and (3) clamping the two opposite inner steel rings inwards along the edge where the protrusions are positioned, and welding the connecting piece.
One or some of the above technical solutions have the following advantages or beneficial effects:
1) According to the invention, the ends of the steel wire mesh skeleton polyethylene composite pipe are folded by utilizing the inner steel ring and the outer steel ring, so that the wire drawing caused by the influence of external force on the steel wire layer 3 at the end is avoided, and the performance of the steel wire mesh skeleton polyethylene composite pipe is influenced. The structure of the steel wire layer of the pipe is stable for a long time, the steel wire layer cannot be moved backwards due to factors such as temperature change, high pressure and bending, and the poor phenomenon of steel wire occurs, after the steel wire layer is firmly fixed at the pipe end, the pipe is connected, so that the steel wire layer is stable for a long time, and the long-term safety of the operation of the pipe is ensured.
2) According to the invention, the polyethylene layers of the two steel wire mesh skeleton polyethylene composite pipes are subjected to hot melt fusion welding, so that the end sealing connection is realized, the inner steel ring and the outer steel ring provide rigid support for the steel wire mesh skeleton polyethylene composite pipes, the polyethylene layers are further pressurized through the connecting piece, the sealing effect is enhanced, and meanwhile, the joint of the two pipelines is prevented from being broken.
3) According to the invention, the sealing performance is improved through butt joint of the end hot-melt polyethylene layers, the problem that the sealing gasket is tightly required for tightening bolts uniformly in the prior art is avoided, the outer layer welding connecting plates improve the overall tensile strength of the pipeline, the connecting pieces are further uniformly distributed along the circumference, and the stress effect of the inner steel ring and the outer steel ring at the end is realized, so that the sealing effect at the end is better, and meanwhile, the damage of the stress to the polyethylene layers is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic view of an outer steel ring installed in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a method for fixing a steel wire according to an embodiment of the present invention.
FIG. 3 is a schematic view of a shear die after shearing in accordance with an embodiment of the present invention.
Wherein: 1. an outer steel ring; 2. an inner steel ring; 3. a steel wire layer; 4. and a connecting piece.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The steel wire mesh skeleton polyethylene composite pipe refers to a composite pipe with a steel wire layer as an intermediate layer and upper and lower composite polyethylene layers.
Aiming at the problems that steel wires at the end parts of a steel wire mesh skeleton polyethylene composite pipe in the prior art are easy to scatter, and a sealing gasket flange method is easy to leak and fall off in the connecting process; and the tightening degree of the bolts on the flange is required to be completely consistent, so that the operation is very difficult.
In one or some embodiments of the invention, a steel wire fixing structure of a steel wire mesh skeleton polyethylene composite pipe end is provided, an inner steel ring 2 is nested at the steel wire mesh skeleton polyethylene composite pipe end, a circle of bulges are arranged at the edge of the inner steel ring 2, and the bulges are positioned at one side far away from the edge of the steel wire mesh skeleton polyethylene composite pipe;
the end part of the steel wire mesh skeleton polyethylene composite pipe is turned over to the inner steel ring 2, the turned over part extends to the bulge, and the outer steel ring 1 is nested outside the turned over steel wire mesh skeleton polyethylene composite pipe.
According to the invention, the ends of the steel wire mesh skeleton polyethylene composite pipe are folded by utilizing the inner steel ring and the outer steel ring, so that the wire drawing caused by the influence of external force on the steel wire layer 3 at the end is avoided, and the performance of the steel wire mesh skeleton polyethylene composite pipe is influenced. The structure of the steel wire layer of the pipe is stable for a long time, the steel wire layer cannot be moved backwards due to factors such as temperature change, high pressure and bending, and the poor phenomenon of steel wire occurs, after the steel wire layer is firmly fixed at the pipe end, the pipe is connected, so that the steel wire layer is stable for a long time, and the long-term safety of the operation of the pipe is ensured.
Preferably, the end part of the outer steel ring 1 is flush with the folded steel wire mesh skeleton polyethylene composite pipe. If the outer steel ring 1 is too long, the end steel wire mesh skeleton polyethylene composite pipe is easy to be dislocated and separated from the space between the inner steel ring and the outer steel ring. If the outer steel ring is too short, abrasion is easily caused to the outermost polyethylene layer.
In one or some embodiments of the invention, a steel wire mesh skeleton polyethylene composite pipe connecting structure is provided, the end parts of two connected steel wire mesh skeleton polyethylene composite pipes are both the steel wire fixing structure of the end head of the steel wire mesh skeleton polyethylene composite pipe, polyethylene layers at the turnover parts of the two steel wire mesh skeleton polyethylene composite pipes are welded in a melting way, and a plurality of connecting pieces 4 are welded at the circumferential parts of the inner steel rings 2 at the connecting parts.
The polyethylene layers of the two connecting pipelines are completely melted, the tightness is consistent in the circumferential direction, the inner steel ring and the outer steel ring 2 are kept stable due to mutual extrusion, and the problem that the tightening of flange bolts is even and requires more tightly in the prior art is avoided.
The polyethylene layers of the two steel wire mesh skeleton polyethylene composite pipes are welded in a hot melting mode, end sealing connection is achieved, the inner steel ring and the outer steel ring provide rigid support for the steel wire mesh skeleton polyethylene composite pipes, the polyethylene layers are further pressurized through the connecting piece 4, and the junction of the two pipelines is prevented from being broken while the sealing effect is enhanced.
Preferably, the distances between any two connecting pieces are equal on the circumference, so that the stress of the inner steel ring and the outer steel ring is equal on the circumference.
In one or some embodiments of the present invention, a method for fixing an end steel wire of a polyethylene composite pipe with a steel wire mesh skeleton is provided, including the following steps: nesting an inner steel ring 2 at the end part of the steel wire mesh skeleton polyethylene composite pipe, and folding the steel wire mesh skeleton polyethylene composite pipe towards the inner steel ring 2 until the edge of the steel wire mesh skeleton polyethylene composite pipe contacts with the bulge of the inner steel ring 2; then the outer steel ring 1 is nested outside the steel wire mesh skeleton polyethylene composite pipe.
Preferably, the method further comprises the following steps: and trimming the end of the steel wire mesh skeleton polyethylene composite pipe to enable the steel wire layer 3 at the end of the steel wire mesh skeleton polyethylene composite pipe to be flush with the polyethylene layer. The steel wire gauze framework is flush with the end of the polyethylene layer, so that the steel wire layer 3 is protected to the greatest extent.
Preferably, the method further comprises the following steps: after the steel wire mesh skeleton polyethylene composite pipe is turned over to the inner steel ring 2, the end is subjected to cold treatment, and then the outer steel ring 1 is nested.
It will be appreciated that the main purpose of the cold treatment is to reduce the chilled volume of the polyethylene layer, and therefore, to re-nest the outer steel ring 1, the polyethylene layer expands on heating to bring the polyethylene layer into closer engagement with the outer steel ring 1 when it is brought back to room temperature.
Or, nesting the outer steel ring (1) by adopting hydraulic equipment; the hydraulic equipment forces the outer steel ring (1) to tightly contact with the polyethylene layer.
Therefore, when the sizes of the inner steel ring and the outer steel ring are actually selected, the gap between the inner steel ring and the outer steel ring should be slightly smaller than the wall thickness of the steel wire mesh skeleton polyethylene composite pipe at normal temperature, so that the steel wire mesh skeleton polyethylene composite pipe is adaptively adjusted in the temperature change process.
In one or some embodiments of the present invention, a method for connecting a steel wire mesh skeleton polyethylene composite pipe is provided, and based on the method for fixing a steel wire at an end of the steel wire mesh skeleton polyethylene composite pipe, the following steps are performed:
carrying out hot melt fusion welding on polyethylene layers at the end parts of the two steel wire mesh skeleton polyethylene composite pipes;
the two opposite inner steel rings 2 are clamped inwards along the edges where the protrusions are located, and the connecting piece 4 is welded.
After the edges of the two opposite inner steel rings 2 are clamped and then welded, the inner and outer steel rings are mutually extruded under the action of stress to maintain good sealing performance, but it should be noted that the inner steel rings 2 should not be sealed along the circumference in the sealing process, because the inner steel rings 2 are stressed inwards along the circumference to press the innermost polyethylene layer to cause damage, and the sealing is not facilitated, which is also demonstrated in the embodiment 5 of the present invention.
Preferably, the inner steel ring 2, the outer steel ring 1 and the connecting piece 4 are made of the same materials;
preferably, the inner steel ring 2, the outer steel ring 1 and the connecting piece 4 are all made of low carbon steel or low alloy steel.
Example 1
The embodiment provides a method for fixing steel wires at the end of a steel wire mesh skeleton polyethylene composite pipe, which comprises the following steps:
1) And trimming the end of the steel wire mesh skeleton polyethylene composite pipe to enable the steel wire layer 3 at the end of the steel wire mesh skeleton polyethylene composite pipe to be flush with the polyethylene layer.
2) The inner steel ring 2 is nested at the end part of the steel wire mesh skeleton polyethylene composite pipe, the steel wire mesh skeleton polyethylene composite pipe is turned over by 180 degrees, and the inner steel ring 2 is turned over until the edge of the steel wire mesh skeleton polyethylene composite pipe contacts with the protruding part of the inner steel ring 2.
3) And (3) carrying out cold treatment on the polyethylene layer at the end, namely placing the polyethylene layer in a cold water bath at the temperature of 2-5 ℃, and then embedding an outer steel ring 1 outside the steel wire mesh skeleton polyethylene composite pipe.
Example 2
The embodiment provides a method for fixing steel wires at the end of a steel wire mesh skeleton polyethylene composite pipe, which is different from embodiment 1 in that in step 2), the steel wire mesh skeleton polyethylene composite pipe is turned over by 180 degrees, and turned over to an inner steel ring 2 until the edge of the steel wire mesh skeleton polyethylene composite pipe passes over a bulge.
And 4) cutting off the redundant part of the polyethylene composite pipe with the steel wire mesh framework after the outer steel ring 1 is nested.
Example 3
The embodiment provides a steel wire mesh skeleton polyethylene composite pipe connection method, which comprises the following steps:
1) On the basis of the embodiment 1, the polyethylene layers at the end parts of the two steel wire mesh skeleton polyethylene composite pipes are subjected to hot melt fusion welding;
2) The two opposite inner steel rings 2 are clamped inwards along the edges where the protrusions are located, and the connecting piece 4 is welded.
Example 4
The embodiment provides a method for connecting a steel wire mesh skeleton polyethylene composite pipe, which is different from embodiment 3 in that,
in step 1), the procedure was carried out on the basis of example 2.
Example 5
The embodiment provides a method for connecting a steel wire mesh skeleton polyethylene composite pipe, which is different from embodiment 3 in that,
in step 2), the connection piece 4 is welded sealingly along the circumference.
Example 6
This example performs a pressure test on the pipes connected in examples 3-5, comprising the steps of:
one end of the connected steel wire mesh skeleton polyethylene composite pipe is welded by a steel plate, and water is injected into the steel wire mesh skeleton polyethylene composite pipe from the other end until water seepage occurs.
As a result, it was found that, in example 3, when the water injection pressure reached 8MPa, leakage occurred at the pipe portion of the connecting pipe shown in example 3, but no leakage occurred at the end joint portion when the knife water injection pressure reached 10 MPa.
For example 4, when the water injection pressure reached 6Mpa, water seepage occurred at the port of the connecting pipe shown in example 4, and when the water injection pressure reached 8Mpa, severe leakage occurred at the port connection, and the water flowed downward in a stranded stream.
For example 5, when the water injection pressure reached 3Mpa, no leakage occurred at the joint of the ends, but the steel wire mesh skeleton polyethylene composite pipe near the convex side leaked severely, and the pipe had obvious cracks.
From the experimental results, the sealing performance of the pipe port shown in the embodiment 3 is best, and the pressure that the port can withstand is far greater than the pressure that the pipe can withstand, and since the medium transported in the pipe is generally limited according to the pressure-bearing capacity of the pipe during the industrial use, the connection mode shown in the embodiment 3 can meet the industrial application.
In the connection mode shown in embodiment 4, a steel wire mesh skeleton polyethylene composite pipe is arranged between the bulge of the inner steel ring 2 and the outer steel ring 1, and the port is not sealed by the inner steel ring 2 and the outer steel ring 1, so that the port sealing performance is lower than the pipeline sealing performance, and the industrial requirement cannot be met.
The connection mode shown in example 5 has good port sealing performance, but the damage to the steel wire mesh skeleton polyethylene composite pipe near the raised part is larger, because the inward stress of the inner steel ring 2 can only be released to the polyethylene layer due to the circumferential sealing, and the polyethylene layer is seriously damaged, which is unfavorable for sealing the pipeline.
In the description of the present specification, it should be understood that the description of the orientations or positional relationships of the inner steel ring, the outer steel ring, the turnover, the outward, etc. are based on the orientations or positional relationships shown in the drawings, only to facilitate description of the present invention and to simplify the description, and are not indicative or implying that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the claims, which follow, as defined in the claims.
Claims (8)
1. The steel wire fixing structure for the end of the steel wire mesh skeleton polyethylene composite pipe is characterized in that an inner steel ring (2) is nested at the end of the steel wire mesh skeleton polyethylene composite pipe, a circle of bulges are arranged at the edge of the inner steel ring (2), and the bulges are positioned at one side far away from the edge of the steel wire mesh skeleton polyethylene composite pipe;
the end part of the steel wire mesh skeleton polyethylene composite pipe is turned over to an inner steel ring (2), the turned over part extends to a bulge, and an outer steel ring (1) is nested outside the turned over steel wire mesh skeleton polyethylene composite pipe;
the end part of the outer steel ring (1) is flush with the folded steel wire mesh skeleton polyethylene composite pipe;
adopt steel wire gauze skeleton polyethylene composite pipe connection structure of two continuous steel wire gauze skeleton polyethylene composite pipe ends of steel wire gauze skeleton polyethylene composite pipe end steel wire fixed knot construct: the polyethylene layers at the folding positions of the two steel wire mesh skeleton polyethylene composite pipes are welded in a melting way, and a plurality of connecting pieces (4) are welded on the inner steel ring (2) at the connecting positions along the circumference.
2. The steel wire mesh skeleton polyethylene composite pipe end steel wire fixing structure according to claim 1, wherein the distances between any two connecting pieces are equal on the circumference.
3. A method for fixing steel wires at the end of a steel wire mesh skeleton polyethylene composite pipe, which comprises the steel wire mesh skeleton polyethylene composite pipe end steel wire fixing structure as set forth in any one of claims 1-2, and is characterized by comprising the following steps: nesting an inner steel ring (2) at the end part of the steel wire mesh skeleton polyethylene composite pipe, and folding the steel wire mesh skeleton polyethylene composite pipe towards the inner steel ring (2) until the edge of the steel wire mesh skeleton polyethylene composite pipe contacts with the convex part of the inner steel ring (2); then an outer steel ring (1) is nested outside the steel wire mesh skeleton polyethylene composite pipe.
4. A method for fixing steel wires at the end of a steel wire mesh skeleton polyethylene composite pipe according to claim 3, further comprising the steps of: and trimming the end of the steel wire mesh skeleton polyethylene composite pipe to enable the steel wire layer (3) at the end of the steel wire mesh skeleton polyethylene composite pipe to be flush with the polyethylene layer.
5. A method for fixing steel wires at the end of a steel wire mesh skeleton polyethylene composite pipe according to claim 3, further comprising the steps of: after the steel wire mesh skeleton polyethylene composite pipe is turned over to the inner steel ring (2), the end head is subjected to cold treatment, and then the outer steel ring (1) is nested;
or, nesting the outer steel ring (1) by adopting hydraulic equipment.
6. A method for connecting a steel wire mesh skeleton polyethylene composite pipe, which is characterized by comprising the following steps on the basis of the method for fixing the steel wires at the end of the steel wire mesh skeleton polyethylene composite pipe according to any one of claims 3-5:
carrying out hot melt fusion welding on polyethylene layers at the end parts of the two steel wire mesh skeleton polyethylene composite pipes;
and (3) clamping the two opposite inner steel rings (2) inwards along the edge where the protrusions are located, and welding the connecting piece (4).
7. The steel wire mesh skeleton polyethylene composite pipe connecting method according to claim 6, wherein the inner steel ring (2), the outer steel ring (1) and the connecting piece (4) are made of the same materials.
8. A steel wire mesh skeleton polyethylene composite pipe connection method according to claim 6, characterized in that the inner steel ring (2), the outer steel ring (1) and the connecting piece (4) are all low carbon steel or low alloy steel.
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| CN202110886760.7A CN113606413B (en) | 2021-08-03 | 2021-08-03 | Steel wire mesh skeleton polyethylene composite pipe end steel wire fixing and connecting structure and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101988611B (en) * | 2009-08-01 | 2012-12-26 | 泰州申视塑料有限公司 | Connection method of ultrahigh molecular weight polyethylene pipelines |
| CN102242845A (en) * | 2010-05-13 | 2011-11-16 | 泰州申视塑料有限公司 | U-shaped flanging pipe joint for connecting polyethylene composite tubular product with ultrahigh molecular weight |
| CN103216691A (en) * | 2013-04-15 | 2013-07-24 | 山东东宏管业有限公司 | Connecting method of polyethylene composite tubes of steel wire gauze framework |
| CN104295817A (en) * | 2014-09-05 | 2015-01-21 | 山东东宏管业有限公司 | Connecting structure and method of steel wire gauze framework polyethylene composite pipes |
| CN209604713U (en) * | 2019-02-25 | 2019-11-08 | 江苏钦谊管业有限公司 | A kind of steel-wire carcass polyethylene compound pipe of fixing buckle |
| CN209724247U (en) * | 2019-04-19 | 2019-12-03 | 胜利油田胜兴集团有限责任公司 | A kind of oil field shaft mouth lining plastic fast and safely attachment device |
| CN211875335U (en) * | 2019-12-31 | 2020-11-06 | 浙江菲达通球环保管业有限公司 | 180-degree flanging connecting device for steel lining ultra-high molecular weight polyethylene pipe |
| CN211667336U (en) * | 2020-02-24 | 2020-10-13 | 山东东宏管业股份有限公司 | Whole internal stay formula all-metal cladding anticreep connection structure |
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