CN105351634A - Thermal insulation pipe with high-density polyethylene wound outer protecting pipe and manufacturing method - Google Patents

Thermal insulation pipe with high-density polyethylene wound outer protecting pipe and manufacturing method Download PDF

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Publication number
CN105351634A
CN105351634A CN201510895469.0A CN201510895469A CN105351634A CN 105351634 A CN105351634 A CN 105351634A CN 201510895469 A CN201510895469 A CN 201510895469A CN 105351634 A CN105351634 A CN 105351634A
Authority
CN
China
Prior art keywords
density polyethylene
thermal insulation
pipe
hdpe
high density
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510895469.0A
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Chinese (zh)
Inventor
张居山
赖贞澄
王辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Logstor Harbin Environment Protection And Energy Saving Product Manufacturing Co Ltd
Original Assignee
Logstor Harbin Environment Protection And Energy Saving Product Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Logstor Harbin Environment Protection And Energy Saving Product Manufacturing Co Ltd filed Critical Logstor Harbin Environment Protection And Energy Saving Product Manufacturing Co Ltd
Priority to CN201510895469.0A priority Critical patent/CN105351634A/en
Publication of CN105351634A publication Critical patent/CN105351634A/en
Pending legal-status Critical Current

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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
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/121—Rigid pipes of plastics with or without reinforcement with three layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • 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
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/027—Bands, cords, strips or the like for helically winding around a cylindrical object
    • 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
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/028—Composition or method of fixing a thermally insulating material
    • 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
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
    • 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
    • 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
    • F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement

Abstract

The invention relates to a thermal insulation pipe with a high-density polyethylene wound outer protecting pipe and a manufacturing method. Due to the low-quality and low-price problems of material adulteration caused by the broad restriction on an original outer protecting pipe production technology, a polyurethane thermal insulation pipe loses a thermal insulation function, and accordingly, the service life of thermal insulation pipelines of a whole network is shortened to be not longer than 10 years, the energy consumption is high, the investment is large, and the operation cost is extremely high. The thermal insulation pipe with the high-density polyethylene wound outer protecting pipe comprises a working pipeline, a rigid polyurethane plastic foam thermal insulation layer and a high-density polyethylene high-temperature soft sheet. The rigid polyurethane plastic foam thermal insulation layer (3) is arranged outside the working pipeline (2), and the high-density polyethylene high-temperature soft sheet (4) is arranged on the outer side of the rigid polyurethane plastic foam thermal insulation layer to form the outer protecting pipe. The manufacturing method is applied to the thermal insulation pipe with the high-density polyethylene wound outer protecting pipe.

Description

There is thermal insulation pipe and making method that high density polyethylene (HDPE) is wound around the outer pillar of shape
technical field:
the present invention relates to the manufacture field of thermal insulation pipe of heat supply, cooling, petroleum and petrochemical industry, boats and ships equal energy source transportation art, particularly a kind of have thermal insulation pipe and the making method that high density polyethylene (HDPE) is wound around the outer pillar of shape.
background technique:
the outer pillar of traditional prefabricated direct-buried thermal insulation pipe adopts fusing expressing technique to make by industrial chemicals; because process engineering is wide in range to material requirements; outer pillar is made to be flooded with Low Density Polyethylene and reclaimed materials; particularly adulterate the outer pillar of reclaimed materials of majority; cause that the outer pillar of thermal insulation pipe breaks, unprotect effectiveness, cause polyurethane insulation coating to seep water, lose insulation effect; cause the whole network pipeline lost of life within 10 years, energy consumption is high, investment is large, operation cost is very big.
summary of the invention:
the object of this invention is to provide a kind of thermal insulation pipe and the making method with the outer pillar of high density polyethylene (HDPE) winding shape.
above-mentioned object is realized by following technological scheme:
a kind of have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, its composition comprises: service pipe, hard polyaminoester plastic foam thermal insulation layer, high density polyethylene (HDPE) high temperature flexible sheet, there is outside described service pipe hard polyaminoester foamed layers, there is outside described hard polyaminoester foamed layers the outer pillar road that high density polyethylene (HDPE) high temperature software is wound.
described has the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, and described service pipe is hardware straight pipeline, and the material of described service pipe can be steel pipe or plastic tube, and the material in described outer pillar road is high density polyethylene (HDPE) high temperature flexible sheet.
described has the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, and described high density polyethylene (HDPE) high temperature flexible sheet is the high density polyethylene (HDPE) sheet material adopting the mode of high temperature hot-melt extruded to obtain by compounding extruder structure.
described has the making method that high density polyethylene (HDPE) is wound around the thermal insulation pipe of the outer pillar of shape, (1) by technological requirement on the orbit of worktable, with two worktable, service pipe is done flying shore, wherein one end support service pipe can be driven to do axial-rotation, and two worktable can orbital motion under the drive of motive power wheel bottom worktable on orbit, (2) PE80 or the PE100 raw material of 100% and other batchings are pressed certain proportioning, put into mixing mechanism, heating and melting, technique adopts high density polyethylene (HDPE) extruder technique, is then formed the flexible sheet of high density polyethylene (HDPE) high temperature by extrusion mechanism, (3) the high temperature flexible sheet extruded by extruder is wrapped on hard polyaminoester plastic foam thermal insulation layer and is wound around, (4) winding process the thermal insulation pipe through urethane plastic uniform in foaming is carried out rolling to rotate, by the uncooled flexible sheet of high-temperature high-density polyethylene extruded, according to the thickness requirement of design, directly be wound on the thermal insulation layer of urethane plastic foaming, then carry out cooling qualitative, finishing touch becomes the qualified outer pillar of polyurethane thermal pipe, (5) rotational speed of the service pipe described in, the extruded velocity of moving speed of table and extrusion mechanism is all by computer control, thus ensure that outer pillar is by the raw material of high density polyethylene (HDPE) PE80-100, after fusing, extrude and form the banded high temperature flexible sheet of high density polyethylene (HDPE), according to the thickness of designing requirement, uniform superposition is wound on urethane plastic foam heat-insulation layer, after reaching the required thickness designing outer pillar, then repair through cooling, formed and be wound around the outer pillar of shape, the polyurethane insulation coating of thermal insulation pipe is produced to the protective action of definitely insulation, extend the thermal insulation layer working life of polyurethane, thus make the operation life-span of the whole network insulation pipe.
beneficial effect of the present invention:
1. of the present invention have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape; the technical matters adopting winding technology to produce outer pillar limits the requirement that raw material are necessary for high density polyethylene (HDPE) PE80-100; the raw material authenticity of material is limited; thoroughly stop the materials'use of reclaimed materials and adulteration; thus protect the working life of polyurethane insulation coating; extend the operation life-span of the whole network thermal insulation pipe; manifest the remarkable effect of energy-saving and emission-reduction; reduce operation cost; purify physical environment, create harmonious society.
of the present invention have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, outer protecting is carried out to the urethane plastic foam heat-insulation layer with different insulation layer thickness, and can according to the soil constituent of pipe network location geographical environment and pipe network operation characteristic, the outer pillar that design and NBS different-thickness require.
of the present invention have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, the raw material adopted due to technological requirement must be PE80-100 level raw materials, after existing extruding technology equipment dissolves, extrude high density polyethylene (HDPE) high temperature flexible sheet, and be directly wound on polyurethane insulation coating according to the thickness requirement of design, define and contain NBS at the outer pillar of the high quality of interior thickness requirement, thus the three-in-one structure of prefabricated direct-buried thermal insulation pipe is supported mutually, reach the effect in synchronous life-span.
of the present invention have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, compare with original technology, owing to adopting winding process, raw material are required strict, limit the use of reclaimed materials and adulteration completely, improve the quality of materials restriction of outer pillar, again owing to adopting winding technology, the outer pillar thickness requirements of difference containing NBS requirement can be realized, both the outer pillar reduced thickness demand of low wearing and tearing soil had been solved, by the requirements for life that can meet the outer pillar of high wearing and tearing soil thickening, the flexible realization of technique, fill up the blank of country in the outer pillar production technology of thermal insulation pipe.
of the present invention have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, because high density polyethylene (HDPE) is wound around the technology application of the outer pillar of shape outward, make the high quality life-span of the life-span of the life-span of steel pipe and polyurethane insulation coating, outer pillar, reach the Trinitarian life-span synchronous, greatly reduce social resources consumption, achieve the carbon emission of minimum manufacture process, considerably reduce the operation cost of pipe network, create harmonious social economic benefit.
of the present invention have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, and quality of product reaches every physical and chemical performance index of GB/T29046-2012, GB/T29047-2012.
of the present invention have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, and the high density polyethylene (HDPE) adopted banded high temperature flexible sheet winding technology, can improve the insulating power of pipeline effectively.
of the present invention have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, and applicable pipeline model is DN200mm-2000mm.
accompanying drawing illustrates:
accompanying drawing 1 is the making method schematic diagram with the thermal insulation pipe of the outer pillar of high density polyethylene (HDPE) winding shape of the present invention.
accompanying drawing 2 is making method side views with the thermal insulation pipe of the outer pillar of high density polyethylene (HDPE) winding shape of the present invention.
embodiment:
embodiment 1:
a kind of have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, its composition comprises: service pipe, hard polyaminoester plastic foam thermal insulation layer, high density polyethylene (HDPE) high temperature flexible sheet, it is characterized in that: described service pipe outer 2 has hard polyaminoester foamed layers 3, there is outside described hard polyaminoester foamed layers the outer pillar road that high density polyethylene (HDPE) high temperature flexible sheet 4 is wound, the inside and outside wall of described service pipe has amine cured epoxy resin coating and Polyamide Epoxy, and coating thickness is 0.038 ~ 0.2 millimeter.
embodiment 2:
according to claim 1 have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, described service pipe is hardware straight pipeline, the material of described service pipe can be steel pipe or plastic tube, and the material in described outer pillar road is high density polyethylene (HDPE) high temperature flexible sheet.
embodiment 3:
according to claim 1 and 2 have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, described high density polyethylene (HDPE) high temperature flexible sheet is the high density polyethylene (HDPE) sheet material adopting the mode of high temperature hot-melt extruded to obtain by being wound around extrusion mechanism, and described winding extrusion mechanism comprises left support worktable 1, right support worktable 5 and compounding extruder 6.
embodiment 4:
the making method with the thermal insulation pipe of the outer pillar of high density polyethylene (HDPE) winding shape according to claim 1 or 2 or 3, (1) by technological requirement on the orbit of worktable, with two worktable, service pipe is done flying shore, wherein one end support service pipe can be driven to do axial-rotation, and two worktable can orbital motion under the drive of motive power wheel bottom worktable on orbit, (2) by PE80 or the PE100 raw material of 100% and other batchings, put into mixing mechanism, heating and melting by certain proportioning, technique adopts high density polyethylene (HDPE) extruder technique, is then formed the flexible sheet of high density polyethylene (HDPE) high temperature by extrusion mechanism, (3) the high temperature flexible sheet extruded by extruder is wrapped on hard polyaminoester plastic foam thermal insulation layer and is wound around, (4) winding process the thermal insulation pipe through urethane plastic uniform in foaming is carried out rolling to rotate, by the uncooled flexible sheet of high-temperature high-density polyethylene extruded, according to the thickness requirement of design, directly be wound on the thermal insulation layer of urethane plastic foaming, then carry out cooling qualitative, finishing touch becomes the qualified outer pillar of polyurethane thermal pipe, (5) rotational speed of the service pipe described in, the extruded velocity of moving speed of table and extrusion mechanism is all by computer control, thus ensure that outer pillar is by the raw material of high density polyethylene (HDPE) PE80-100, after fusing, extrude and form the banded high temperature flexible sheet of high density polyethylene (HDPE), according to the thickness of designing requirement, uniform superposition is wound on urethane plastic foam heat-insulation layer, after reaching the required thickness designing outer pillar, then repair through cooling, formed and be wound around the outer pillar of shape, the polyurethane insulation coating of thermal insulation pipe is produced to the protective action of definitely insulation, extend the thermal insulation layer working life of polyurethane, thus make the operation life-span of the whole network insulation pipe.

Claims (4)

1. one kind has the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, its composition comprises: service pipe, hard polyaminoester plastic foam thermal insulation layer, high density polyethylene (HDPE) high temperature flexible sheet, it is characterized in that: there is outside described service pipe hard polyaminoester foamed layers that there is outside described hard polyaminoester foamed layers the outer pillar road that high density polyethylene (HDPE) high temperature software is wound.
2. according to claim 1 have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, it is characterized in that: described service pipe is hardware straight pipeline, described service pipe is steel pipe or plastic tube, and described outer pillar road is high density polyethylene (HDPE) high temperature flexible sheet.
3. according to claim 1 and 2 have the thermal insulation pipe that high density polyethylene (HDPE) is wound around the outer pillar of shape, it is characterized in that: described high density polyethylene (HDPE) high temperature flexible sheet is the high density polyethylene (HDPE) sheet material adopting the mode of high temperature hot-melt extruded to obtain by compounding extruder structure.
4. the making method with the thermal insulation pipe of the outer pillar of high density polyethylene (HDPE) winding shape according to claim 1 or 2 or 3, it is characterized in that: (1) by technological requirement on the orbit of worktable, with two worktable, service pipe is done flying shore, wherein the support of one end can drive service pipe to do axial-rotation, and two worktable can orbital motion under the drive of motive power wheel bottom worktable on orbit, (2) by PE80 or the PE100 raw material of 100% and other batchings, put into mixing mechanism, heating and melting by certain proportioning, technique adopts high density polyethylene (HDPE) extruder technique, is then formed the flexible sheet of high density polyethylene (HDPE) high temperature by extrusion mechanism, (3) the high temperature flexible sheet extruded by extruder is wrapped on hard polyaminoester plastic foam thermal insulation layer and is wound around, (4) winding process the thermal insulation pipe through urethane plastic uniform in foaming is carried out rolling to rotate, by the uncooled flexible sheet of high-temperature high-density polyethylene extruded, according to the thickness requirement of design, directly be wound on the thermal insulation layer of urethane plastic foaming, then carry out cooling qualitative, finishing touch becomes the qualified outer pillar of polyurethane thermal pipe, (5) rotational speed of the service pipe described in, the extruded velocity of moving speed of table and extrusion mechanism is all by computer control, thus ensure that outer pillar is by the raw material of high density polyethylene (HDPE) PE80-100, after fusing, extrude and form the banded high temperature flexible sheet of high density polyethylene (HDPE), according to the thickness of designing requirement, uniform superposition is wound on urethane plastic foam heat-insulation layer, after reaching the required thickness designing outer pillar, then repair through cooling, formed and be wound around the outer pillar of shape, the polyurethane insulation coating of thermal insulation pipe is produced to the protective action of definitely insulation, extend the thermal insulation layer working life of polyurethane, thus make the operation life-span of the whole network insulation pipe.
CN201510895469.0A 2015-12-08 2015-12-08 Thermal insulation pipe with high-density polyethylene wound outer protecting pipe and manufacturing method Pending CN105351634A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510895469.0A CN105351634A (en) 2015-12-08 2015-12-08 Thermal insulation pipe with high-density polyethylene wound outer protecting pipe and manufacturing method

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106219332A (en) * 2016-08-26 2016-12-14 中投（天津）热力股份有限公司 A kind of glass fibre reinforced plastic insulation pipe wind
CN108612921A (en) * 2018-03-09 2018-10-02 四川泰鑫实业发展有限责任公司 The cladding and mobile device of polyethylene pipe hard polyaminoester anti-freezing and heat-insulating layer
CN109386692A (en) * 2018-12-24 2019-02-26 哈尔滨朗格斯特节能科技有限公司 The foaming of hard polyaminoester mold is combined insulating tube and manufacturing method with polyethylene winding
CN110056716A (en) * 2019-04-15 2019-07-26 重庆鼎久管道有限公司 A kind of corrosion-resistant thermal insulation composite steel tube

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201866470U (en) * 2010-11-24 2011-06-15 天津市管道工程集团有限公司保温管厂 Rigid polyurethane-sprayed polyethylene-twined prefabrication buried thermal insulation pipe
US20110192486A1 (en) * 2010-02-05 2011-08-11 Thomas Joseph Keyes Water Spread Limiting System for Pre-Insulated Piping
CN104235518A (en) * 2014-09-25 2014-12-24 哈尔滨朗格斯特节能科技有限公司 Large-diameter spraying winding-type prefabricated direct-burial insulating pipe and installation method
CN204622629U (en) * 2015-05-15 2015-09-09 天津市管道工程集团有限公司 A kind of polyurethane coating polyethylene is wound around insulating tube production line
CN205479766U (en) * 2015-12-08 2016-08-17 朗格斯特哈尔滨环保节能产品制造有限公司 Insulating tube with outer pillar of high density polyethylene winding shape

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110192486A1 (en) * 2010-02-05 2011-08-11 Thomas Joseph Keyes Water Spread Limiting System for Pre-Insulated Piping
CN201866470U (en) * 2010-11-24 2011-06-15 天津市管道工程集团有限公司保温管厂 Rigid polyurethane-sprayed polyethylene-twined prefabrication buried thermal insulation pipe
CN104235518A (en) * 2014-09-25 2014-12-24 哈尔滨朗格斯特节能科技有限公司 Large-diameter spraying winding-type prefabricated direct-burial insulating pipe and installation method
CN204622629U (en) * 2015-05-15 2015-09-09 天津市管道工程集团有限公司 A kind of polyurethane coating polyethylene is wound around insulating tube production line
CN205479766U (en) * 2015-12-08 2016-08-17 朗格斯特哈尔滨环保节能产品制造有限公司 Insulating tube with outer pillar of high density polyethylene winding shape

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106219332A (en) * 2016-08-26 2016-12-14 中投（天津）热力股份有限公司 A kind of glass fibre reinforced plastic insulation pipe wind
CN108612921A (en) * 2018-03-09 2018-10-02 四川泰鑫实业发展有限责任公司 The cladding and mobile device of polyethylene pipe hard polyaminoester anti-freezing and heat-insulating layer
CN108612921B (en) * 2018-03-09 2020-09-15 四川泰鑫实业发展有限责任公司 Coating and moving device of rigid polyurethane anti-freezing heat-insulating layer for polyethylene pipeline
CN109386692A (en) * 2018-12-24 2019-02-26 哈尔滨朗格斯特节能科技有限公司 The foaming of hard polyaminoester mold is combined insulating tube and manufacturing method with polyethylene winding
CN110056716A (en) * 2019-04-15 2019-07-26 重庆鼎久管道有限公司 A kind of corrosion-resistant thermal insulation composite steel tube

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Application publication date: 20160224