CN102430507A - Processing technology for polyurethane insulation layer of insulation pipe - Google Patents
Processing technology for polyurethane insulation layer of insulation pipe Download PDFInfo
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- CN102430507A CN102430507A CN2011102248559A CN201110224855A CN102430507A CN 102430507 A CN102430507 A CN 102430507A CN 2011102248559 A CN2011102248559 A CN 2011102248559A CN 201110224855 A CN201110224855 A CN 201110224855A CN 102430507 A CN102430507 A CN 102430507A
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Abstract
The invention discloses a processing technology for a polyurethane insulation layer of an insulation pipe. The processing technology is characterized by comprising the following steps of: (1) preparing a spraying foaming raw material from isocyanate, polyether polyol and an efficient catalyst; (2) clearing away the rust, mud, greasy dirt and any impurity influencing the adhesive bonding of a foam layer attached to the outer wall of a pipeline; (3) placing a steel pipe on a moving bracket, and starting the bracket such that the steel pipe rotates axially at a constant speed while advancing at a constant speed; and (4) uniformly spraying the spraying foaming raw material in a form of mist liquid to the outer wall of the pipeline by a spraying gun, wherein the spraying thickness is 20-40 mm. In the invention, a large-diameter pipeline can be directly subjected to the spraying foaming process, and high mould manufacturing expenses are avoided. The foam insulating layer formed by the spraying foaming has the same shape as the pipeline, thereby avoiding joint and ensuring good adhesion between the foam body and the pipe and a good heat insulation effect. The spraying foaming raw material adopted in the invention has good reactivity and can immediately react and quickly gelate after being sprayed onto the surface of an object so that the raw material can quickly form a foam layer on the surface of the pipeline, the formation is fast and the efficiency is high.
Description
Technical field
The invention belongs to the processing method of insulating steel tube, a kind of specifically processing technology of insulating tube polyurethane insulation coating.
Background technology
At present, in the pipe insulation industry, the heat-insulation layer of pipeline mostly adopts polyurethane foam to process; Its process mainly is: elder generation's suit polyethylene coating pipe in the outside of steel pipe; Leave the space between the two, and the space is processed evenly, in the two space, carrying out foaming operation by polyurethane foam equipment by back-up block; Fill the space by polyurathamc, form heat-insulation layer.This process operation is pretty troublesome, and because the existence of back-up block influences heat insulation effect.
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 insulating tube polyurethane insulation coating is provided, and it is easy to operate, and efficient is high, the heat-insulation layer high insulating effect.
For reaching above-mentioned purpose, the present invention takes following process:
1, adopts isocyanates, PPG and effective catalyst preparation spray coating foaming raw material;
2, remove rust, earth, greasy dirt and any bonding impurity of froth bed that influences that pipeline outer wall attached;
3, steel pipe is placed on the movable support bracket, starts carriage, steel shaft advances to constant speed rotation and constant speed;
4, adopt spray gun the spray coating foaming raw material evenly to be injected into pipeline outer wall with the spray film form, coating thickness 20-40mm.
The present invention takes above-mentioned process, has following beneficial effect: the present invention can directly implement spray coating foaming processing for large diameter pipeline, does not need expensive mould manufacturing expense.The foam heat-insulation layer shape of spray coating foaming moulding is consistent with pipe shape, no seam, and the cementability of foams and tubing is good, and insulation effect is good.Also be provided with the polyethylene outer jacket in the foam heat-insulation layer outside, the foam heat-insulation layer of spray coating foaming moulding of the present invention employing polyethylene preferably take-up strap coats, and is bonding firm, can the better protect internal material.The spray coating foaming raw material reaction of the present invention's employing is active high, and material is ability immediate response and rapid gel after being injected into body surface, makes it form froth bed rapidly at pipe surface.Be particularly useful for the insulation of large diameter pipeline, shaping speed is fast, and production efficiency is high.
The specific embodiment
Introduce the present invention in detail below in conjunction with specific embodiment.
Embodiment
The present invention takes following technology:
1, adopts isocyanates, PPG and effective catalyst preparation spray coating foaming raw material;
2, remove rust, earth, greasy dirt and any bonding impurity of froth bed that influences that pipeline outer wall attached;
3, steel pipe is placed on the movable support bracket, starts carriage, steel shaft advances to constant speed rotation and constant speed;
4, adopt spray gun the spray coating foaming raw material evenly to be injected into pipeline outer wall with the spray film form, the about 20-40mm of coating thickness.
In technology of the present invention, adopt the spray gun spraying, easy operating, spray gun and steel pipe are best with the upright position, and jet length generally is controlled at about 1m.Want strict control steel pipe rotating speed steady in process of production, translational speed is balanced, and must adapt with spray gun spray volume and reactant foamable gel speed.And the polyethylene material twines with the gel degree and adapts, can be bonding tight with heat-insulation layer, and again the heat-insulation layer tight coating.
The present invention is the coating of insulation material such as suitable large diameter pipeline more, and especially in-situ spraying foaming is more convenient and practical.
Claims (1)
1. insulating tube polyurethane insulation coating processing technology is characterized in that it takes following operating procedure:
(1) adopts isocyanates, PPG and effective catalyst preparation spray coating foaming raw material;
(2) remove rust, earth, greasy dirt and any bonding impurity of froth bed that influences that pipeline outer wall attached;
(3) steel pipe is placed on the movable support bracket, starts carriage, steel shaft advances to constant speed rotation and constant speed;
(4) adopt spray gun the spray coating foaming raw material evenly to be injected into pipeline outer wall with the spray film form, coating thickness 20-40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102248559A CN102430507A (en) | 2011-08-08 | 2011-08-08 | Processing technology for polyurethane insulation layer of insulation pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102248559A CN102430507A (en) | 2011-08-08 | 2011-08-08 | Processing technology for polyurethane insulation layer of insulation pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102430507A true CN102430507A (en) | 2012-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102248559A Pending CN102430507A (en) | 2011-08-08 | 2011-08-08 | Processing technology for polyurethane insulation layer of insulation pipe |
Country Status (1)
| Country | Link |
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| CN (1) | CN102430507A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102922651A (en) * | 2012-10-04 | 2013-02-13 | 河北昊天管业股份有限公司 | Processing method of anti-shearing and high temperature-resisting composite water-polyurethane heat-insulation pipe |
| CN105345981A (en) * | 2015-12-08 | 2016-02-24 | 朗格斯特哈尔滨环保节能产品制造有限公司 | Processing equipment of polyurethane foamed thermal insulating pipe with cyclopentane component and foaming method |
| CN105371059A (en) * | 2015-12-08 | 2016-03-02 | 朗格斯特哈尔滨环保节能产品制造有限公司 | Hard polyurethane foam plastic spraying heat preservation pipe and spraying method |
| CN105397968A (en) * | 2015-12-08 | 2016-03-16 | 朗格斯特哈尔滨环保节能产品制造有限公司 | Polyurethane spraying foaming device and polyurethane spraying method |
| CN105563726A (en) * | 2015-12-08 | 2016-05-11 | 朗格斯特哈尔滨环保节能产品制造有限公司 | Manufacturing equipment for polyurethane-foamed thermal-insulation pipe fittings containing cyclopentane and foaming method of manufacturing equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5534299A (en) * | 1994-06-22 | 1996-07-09 | Bayer Aktiengsellschaft | Process for insulating pipes |
| JP2000054522A (en) * | 1998-08-06 | 2000-02-22 | Bridgestone Corp | Heat insulation material |
| CN1846878A (en) * | 2006-04-29 | 2006-10-18 | 常州市鼎达建筑新技术有限公司 | In-situ spraying process of protective polyurethane plastic foam layer |
| 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 |
-
2011
- 2011-08-08 CN CN2011102248559A patent/CN102430507A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5534299A (en) * | 1994-06-22 | 1996-07-09 | Bayer Aktiengsellschaft | Process for insulating pipes |
| JP2000054522A (en) * | 1998-08-06 | 2000-02-22 | Bridgestone Corp | Heat insulation material |
| CN1846878A (en) * | 2006-04-29 | 2006-10-18 | 常州市鼎达建筑新技术有限公司 | In-situ spraying process of protective polyurethane plastic foam layer |
| 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102922651A (en) * | 2012-10-04 | 2013-02-13 | 河北昊天管业股份有限公司 | Processing method of anti-shearing and high temperature-resisting composite water-polyurethane heat-insulation pipe |
| CN102922651B (en) * | 2012-10-04 | 2015-11-25 | 河北昊天能源投资集团有限公司 | The processing method of anti-shearing high-temperature resistant water polyurethane composite thermal insulation pipe |
| CN105345981A (en) * | 2015-12-08 | 2016-02-24 | 朗格斯特哈尔滨环保节能产品制造有限公司 | Processing equipment of polyurethane foamed thermal insulating pipe with cyclopentane component and foaming method |
| CN105371059A (en) * | 2015-12-08 | 2016-03-02 | 朗格斯特哈尔滨环保节能产品制造有限公司 | Hard polyurethane foam plastic spraying heat preservation pipe and spraying method |
| CN105397968A (en) * | 2015-12-08 | 2016-03-16 | 朗格斯特哈尔滨环保节能产品制造有限公司 | Polyurethane spraying foaming device and polyurethane spraying method |
| CN105563726A (en) * | 2015-12-08 | 2016-05-11 | 朗格斯特哈尔滨环保节能产品制造有限公司 | Manufacturing equipment for polyurethane-foamed thermal-insulation pipe fittings containing cyclopentane and foaming method of manufacturing equipment |
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Application publication date: 20120502 |