CN102350791A - Insulating pipe polyethylene oversheath processing technology - Google Patents
Insulating pipe polyethylene oversheath processing technology Download PDFInfo
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- CN102350791A CN102350791A CN2011102248510A CN201110224851A CN102350791A CN 102350791 A CN102350791 A CN 102350791A CN 2011102248510 A CN2011102248510 A CN 2011102248510A CN 201110224851 A CN201110224851 A CN 201110224851A CN 102350791 A CN102350791 A CN 102350791A
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- polyethylene
- steel pipe
- winding
- insulation layer
- heat
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Abstract
The invention discloses an insulating pipe polyethylene oversheath processing technology and is characterized in that the processing technology comprises the following operation steps of: (1) placing a steep pipe with a foaming heat-insulation layer on a movable bracket; (2) fixing one end of a polyethylene wrapping tape on the steel pipe; (3) starting the bracket to make the steel pipe to rotate in the axial direction at a constant speed on the bracket and move forward horizontally at a constant speed, and uniformly winding the polyethylene wrapping tape on the heat-insulation layer. The technological method of winding the polyethylene wrapping tape on the heat-insulation layer of the steel pipe is adopted in the invention so as to overcome various insufficiencies such as high cost, inconvenient operation and caliber restriction due to the adoption of an original polyethylene outer cannula. It can be not restricted by the caliber of the steel pipe by directly winding on the foaming heat-insulation layer, and the winding thickness can also be adjusted according to requirements. As the foaming comes before the winding, the foaming pressure doesn't need bearing. Therefore, the thickness of the winding material is small and the material is saved.
Description
Technical field
The invention belongs to a kind of processing method of insulating tube, a kind of specifically processing technology of polyurethane heat-insulation steel pipe polyethylene oversheath.
Background technology
In the prior art, insulating steel tube mostly is the steel pipe that comprises innermost layer, middle heat-insulation layer and outermost oversheath, and heat-insulation layer generally adopts polyurethane material, and oversheath adopts polythene material, and the polyethylene oversheath has the effect of waterproof sealing.At present, the polyethylene oversheath all adopts sleeve type structure, according to standard, in extruder, processes the polyethylene sleeve pipe earlier that is:, then, with the outside of polyethylene jacket pipe box at steel pipe, adds back-up block between the two and keeps the space even.To implementing polyurethane foam between the two,, play the effect of insulation again with the space of polyurethane filling steel pipe and polyethylene sleeve pipe.The deficiency of its existence is: manufacturing procedure is loaded down with trivial details, need set up the process equipment of polyethylene sleeve pipe, because this casing diameter is big, length is longer, therefore, equipment volume is big, and cost is high, and poor, the non-uniform phenomenon of circularity often appears in the sleeve pipe that processes, and percent defective is high.And this technology is to produce corresponding sleeve pipe according to the thickness of steel pipe, so the polyethylene sleeve pipe receives the restriction of bore, the frequent transposing equipment of needs, troublesome poeration.In addition, this technology is between steel pipe and polyethylene sleeve pipe, to foam, and needs the polyethylene jacket pipe to have certain thickness, and to satisfy the pressure that foaming produces, like this, thicker sleeve pipe has increased the raw material input, causes very big waste.
Summary of the invention
The present invention's purpose is to overcome the above-mentioned deficiency of prior art, and a kind of processing technology of polyurethane heat-insulation steel pipe polyethylene oversheath is provided, and it is easy to operate, and efficient is high, and quality is good, and is applied widely.
For reaching above-mentioned purpose, the present invention takes following process:
1, on movable support bracket, places the steel pipe that has insulating foam layer;
2, polyethylene take-up strap one end is fixed on the steel pipe;
3, start carriage, steel pipe axial constant speed on carriage is rotated and horizontal constant speed is advanced, and the polyethylene take-up strap is wrapped on the heat-insulation layer equably.
The present invention takes technique scheme; Have following beneficial effect: the present invention adopts the polyethylene take-up strap to be wrapped in the process on the steel pipe heat-insulation layer, has overcome expense height, troublesome poeration that original employing polyethylene coating pipe caused, has received all deficiencies of bore restriction.Directly on the heat-insulation layer of foaming, twine the restriction that can not receive the steel pipe bore, can also reconcile winding thickness as requested.Owing to be to foam earlier afterwards to twine, needn't bear blow pressure, therefore, the thickness of winding material is less, has saved material.Simultaneously, simplified poling, outer tube is extruded and operation such as carrying back and forth, has improved production efficiency.The polyethylene take-up strap that the present invention adopted is a homogeneous raw material with the original polyethylene coating pipe that adopts, and has guaranteed original mechanical performance.
The specific embodiment
Introduce the present invention in detail below in conjunction with specific embodiment.
Embodiment
The present invention takes following technology:
1, on movable support bracket, places the steel pipe that has insulating foam layer;
2, polyethylene take-up strap one end is fixed on the steel pipe;
3, start carriage, steel pipe axial constant speed on carriage is rotated and horizontal constant speed is advanced, and the polyethylene take-up strap is wrapped on the heat-insulation layer equably.
In technology of the present invention, take-up strap just begins to twine in foaming process, and twines with the tension uniform of 0.02Mpa.Strict control steel pipe rotating speed is steady, and translational speed is balanced, and polyethylene take-up strap and foamed material curing rate adapt, and has improved the bonding force of take-up strap and heat-insulation layer, guarantee with heat-insulation layer bonding tight, stronger to the protective effect of heat-insulation layer.
Claims (1)
1. insulating tube polyethylene oversheath processing technology is characterized in that it takes following operating procedure:
(1) on movable support bracket, places the steel pipe that has insulating foam layer;
(2) polyethylene take-up strap one end is fixed on the steel pipe;
(3) start carriage, steel pipe axial constant speed on carriage is rotated and horizontal constant speed is advanced, and the polyethylene take-up strap is wrapped on the heat-insulation layer equably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102248510A CN102350791A (en) | 2011-08-08 | 2011-08-08 | Insulating pipe polyethylene oversheath processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102248510A CN102350791A (en) | 2011-08-08 | 2011-08-08 | Insulating pipe polyethylene oversheath processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102350791A true CN102350791A (en) | 2012-02-15 |
Family
ID=45574490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102248510A Pending CN102350791A (en) | 2011-08-08 | 2011-08-08 | Insulating pipe polyethylene oversheath processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102350791A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103624962A (en) * | 2013-12-20 | 2014-03-12 | 哈尔滨朗格斯特节能科技有限公司 | Primary cooling device for high density polyethylene of winding type pre-fabricated directly-buried heat-insulation pipe |
| CN111688178A (en) * | 2020-06-02 | 2020-09-22 | 天华化工机械及自动化研究设计院有限公司 | System and process for forming plastic protective layer by winding after continuous spraying of pipeline heat-insulating layer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1452031A (en) * | 1974-01-02 | 1976-10-06 | Bpa Byggproduktion Ab | Pipes having an insulating layer directly applied and foamed the reon and a method of making the insulated pipes |
| JPS59201820A (en) * | 1983-05-02 | 1984-11-15 | Nippon Steel Corp | Preparation of polyethylene coated steel pipe having coloring layer |
| JPS59215819A (en) * | 1983-05-23 | 1984-12-05 | Ube Ind Ltd | Device for winding heat shrinkable tape around pipe |
| CN2286514Y (en) * | 1997-04-30 | 1998-07-22 | 新疆凌峰热电节能有限公司 | Thermal insulation pipe winded by plastic strip |
| JPH1144394A (en) * | 1997-07-29 | 1999-02-16 | Nittetsu Boshoku Kk | Manufacture of heat insulating pipe |
| CN1810493A (en) * | 2005-01-26 | 2006-08-02 | 徐中全 | Production process of heat insulating pipe with outer protecting layer of ribbed polyurethane foam |
-
2011
- 2011-08-08 CN CN2011102248510A patent/CN102350791A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1452031A (en) * | 1974-01-02 | 1976-10-06 | Bpa Byggproduktion Ab | Pipes having an insulating layer directly applied and foamed the reon and a method of making the insulated pipes |
| JPS59201820A (en) * | 1983-05-02 | 1984-11-15 | Nippon Steel Corp | Preparation of polyethylene coated steel pipe having coloring layer |
| JPS59215819A (en) * | 1983-05-23 | 1984-12-05 | Ube Ind Ltd | Device for winding heat shrinkable tape around pipe |
| CN2286514Y (en) * | 1997-04-30 | 1998-07-22 | 新疆凌峰热电节能有限公司 | Thermal insulation pipe winded by plastic strip |
| JPH1144394A (en) * | 1997-07-29 | 1999-02-16 | Nittetsu Boshoku Kk | Manufacture of heat insulating pipe |
| CN1810493A (en) * | 2005-01-26 | 2006-08-02 | 徐中全 | Production process of heat insulating pipe with outer protecting layer of ribbed polyurethane foam |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103624962A (en) * | 2013-12-20 | 2014-03-12 | 哈尔滨朗格斯特节能科技有限公司 | Primary cooling device for high density polyethylene of winding type pre-fabricated directly-buried heat-insulation pipe |
| CN103624962B (en) * | 2013-12-20 | 2016-09-07 | 哈尔滨朗格斯特节能科技有限公司 | Cooling device of winding-type prefabricated direct-buried thermal insulation pipe high density polyethylene (HDPE) |
| CN111688178A (en) * | 2020-06-02 | 2020-09-22 | 天华化工机械及自动化研究设计院有限公司 | System and process for forming plastic protective layer by winding after continuous spraying of pipeline heat-insulating layer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120215 |