CN103195989B - Machining method of plastic composite tube with metal pressure bearing layer clamped inside - Google Patents
Machining method of plastic composite tube with metal pressure bearing layer clamped inside Download PDFInfo
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- CN103195989B CN103195989B CN201310119632.5A CN201310119632A CN103195989B CN 103195989 B CN103195989 B CN 103195989B CN 201310119632 A CN201310119632 A CN 201310119632A CN 103195989 B CN103195989 B CN 103195989B
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Abstract
The invention discloses a plastic composite tube with a metal pressure bearing layer clamped inside and a machining method thereof. The plastic composite tube is composed of a plastic inner layer tube, the metal pressure bearing layer and a plastic coating layer which are combined from inside to outside. The machining method includes: a plastic tube extrusion molding production line machines a tube into the plastic inner layer tube with the required dimension; a twisting machine circumferentially twists a metal belt on the outer wall of the plastic inner layer tube for molding; a welding machine welds the metal belt into the metal pressure bearing layer along the twisting butting gaps or lap joint edges of the metal belt; a traction machine drags the plastic inner layer tube coated with the metal pressure bearing layer to the two-layer metal plastic composite tube extrusion molding production line, and a layer of plastic coating layer with the required dimension is coated on the metal pressure bearing layer to manufacture the plastic composite tube; and the plastic composite tube can be cut to the required length. The plastic inner tube layer is contacted with media, the plastic coating layer has the connection and protection effect, and the metal pressure bearing layer has the important functions of pressure bearing and heat resisting.
Description
Technical field
The present invention relates to a kind of multiple tube and processing method thereof of plastics of inner clip metal bearing course, belong to multiple tube technical field.
Background technology
Traditional composite metal-plastic pipe more adopts internal plastic coating or lining to mould and covers the processing method of moulding outward, and such multiple tube is just based on metal level function, and install connection on the metal layer, plastic layer only bears various protective action; And adopting the outer plastic layer that covers that the processing method connected is installed, the stripping of failing again to stop metal and plastics junction is permeated.
Adopt the conventional plastic multiple tube of more than three layers of therebetween metal level, more common processing method be plastics ectonexine adopt twice extrusion molding or once penetrate extrusion process, metal level adopts longitudinal clad welded or lap joint process, the tubing of production fails to embody the feature of metal level Nai Gaore and high pressure.
The pipeline of a lot of application needs Nai Gaore and high pressure simultaneously now, also lightweight, connect reliable, effectively can replace the pressure-bearing metal such as copper, metal pipe, as: solar water carrier pipe (requiring the height of resistance to limit heat and high pressure), the managing compared with large gauge building internal riser, hot water central heating secondary pipe network of heating and production delivery, replace the bright tubulature etc. of the idle call pipe of soft state copper pipe, high voltage bearing mining non-metallic pipe (also requiring lightweight), anticollision.This tubing needs a kind of processing method of inner clip metal bearing course plastic composite pipe, effectively can keep metallic intermediate layer Guan Ju You Nai Gaore and high pressure and significantly reduce weight, internal layer can bear health, the function such as corrosion-resistant, skin can adopt the modes such as welding to connect safely and reliably, and metal and plastics junction can effectively prevent from again peeling off infiltration.
Summary of the invention
Problem to be solved by this invention is to provide a kind of plastic composite pipe and processing method thereof, effectively can keep the high temperature resistant of metallic intermediate layer pipe and high pressure and significantly reduce weight, internal layer can bear health, the function such as corrosion-resistant, skin can adopt the modes such as welding to connect safely and reliably, and the flexible delamination that can effectively prevent from again expanding of metal and plastics junction is separated.
In order to solve the problem, the invention provides a kind of plastic composite pipe of inner clip metal bearing course, it is characterized in that, described plastic composite pipe is made up of the inner plastic pipe of from inside to outside compound, metal bearing course, plastics outer covering layer.
Preferably, described metal bearing course is made up of the metal tape be wound in outside inner plastic pipe.
Present invention also offers the processing method of the plastic composite pipe of above-mentioned inner clip metal bearing course, it is characterized in that, concrete steps are as follows:
The first step: the inner plastic pipe being first processed into given size by plastic tube extrusion molding production line;
Second step: while inner plastic pipe is at the uniform velocity drawn by hauling machine, by wrapping machine, metal tape is Wrapping formed in inner plastic pipe outer wall circumference;
3rd step: be welded into metal bearing course by the circumferential winding butt seam along metal tape of bonding machine or overlap edge edge;
4th step: hauling machine traction is outer is covered with the inner plastic pipe of metal bearing course to double layer of metal plastic composite pipe extrusion molding production line, double layer of metal plastic composite pipe extrusion molding production line moulds the plastics outer covering layer covering one deck given size outside metal bearing course, makes plastic composite pipe;
5th step: hauling machine traction plastic composite pipe, to cutting machine, cuts into Len req.
Preferably, the helical angle that in described second step, metal tape is wound around at inner plastic pipe outer wall is 30 °-85 °.
Metal bearing course adopts metal tape to be wound around welding fabrication on inner plastic pipe outer wall, utilize circumference to be wound around dissipate heat that welding produces is by together with hot melt adhesion suitable with inner plastic pipe outer wall for metal bearing course, the girth seam of metal bearing course can also be moulded the heat overlayed on metal bearing course and covers bonding force by reinforced plastics outer covering layer, prevents from peeling off infiltration.Inner plastic pipe and medium contact, plastics outer covering layer has and connects and the function of protection, and metal bearing course has pressure-bearing, the critical function such as heat-resisting.
Metal bearing course adopts metal tape to be wound around welding fabrication technique on inner plastic pipe outer wall, this processing method uses for reference the principle of spiral welded steel pipe, also owing to being clipped between inner plastic pipe, plastics outer covering layer, compare the bearing capacity that homogenous metal spiral welded pipe reaches same, this metal bearing course significantly can reduce wall thickness, simultaneously, roll bending rolling direction due to spiral welded pipe is not vertical welding tube axis direction (its angle depends on the helical angle of welded tube), spiral weld place combined stress only has the 60-85% of ERW principal stress (radial stress), and, near weld seam during existing defects, because spiral weld is stressed less, therefore the danger of its expansion is also be not as large as straight weld, the phenomenon of longitudinal cracking can not be caused to occur, thus the cracking resistance of spiral welded pipe, static pressure blasting intensity, pliability and fatigue strength etc. are better than ERW, reach same bearing capacity, this metal bearing course can reduce wall thickness 20% ~ 40%.
Adopt metal tape welding fabrication on inner plastic pipe outer wall, the dissipate heat that welding produces and diffusion zone be the speed of welding that can be controlled by PC with extrude synchronous, can under the prerequisite not destroying inner plastic pipe performance, together with the hot melt adhesion suitable with inner plastic pipe outer wall by metal bearing course.Circumference is adopted to be wound around welding to the impact of inner plastic pipe in commissure, with the functional similarity of spiral welded steel pipe, than the remarkable minimizing of straight seam welding.The weld seam that circumference is wound around welding also reinforced plastics outer covering layer is moulded the heat overlayed on metal bearing course and is covered bonding force, and this heat covers bonding force circumferentially around, the adhesion larger between reinforced plastics outer covering layer and metal bearing course.This processing method can make metal bearing course and inner plastic pipe outer wall hot melt adhesion, covers bonding with plastics outer covering layer heat, and produce circumferential hoop around weld seam, can prevent from normal using radial and axial the strippings formation medium osmosis produced.
The winding welding fabrication technique of metal bearing course can reach under same bearing capacity, and reduce wall thickness 20% ~ 40%, weight is lighter simultaneously; Metal bearing course and inner plastic pipe outer wall hot melt adhesion, cover bonding with plastics outer covering layer heat, and produce circumferential hoop around weld seam, prevent from normal using radial and axial the strippings formation medium osmosis produced; Can realize that cast is regular, even weld distribution, control mouth of pipe ovality; Compared with shaping with straight seam welding, welding equipment and mould can be simplified, shorten production line length, reduce the requirement to Workplace.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the plastic composite pipe of inner clip metal bearing course provided by the invention;
Fig. 2 is the flow chart of plastic composite pipe processing method provided by the invention.
Detailed description of the invention
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
Embodiment
As shown in Figure 2, be the flow chart of plastic composite pipe processing method provided by the invention, concrete steps are as follows:
The first step: the inner plastic pipe 2 being first processed into given size by plastic tube extrusion molding production line 5;
Second step: while inner plastic pipe 2 is at the uniform velocity drawn by hauling machine 10, with helical angle 30 °-85 °, metal tape 7 is Wrapping formed in inner plastic pipe 2 outer wall circumference by wrapping machine 6;
3rd step: by bonding machine 8 circumference along the winding butt seam of metal tape 7 or overlap edge along being welded into metal bearing course 4;
4th step: hauling machine 10 draws outer inner plastic pipe 2 to the double layer of metal plastic composite pipe extrusion molding production line 9 being covered with metal bearing course 4, double layer of metal plastic composite pipe extrusion molding production line 9 moulds the plastics outer covering layer 3 covering one deck given size outside metal bearing course 4, makes plastic composite pipe 1;
5th step: hauling machine 10 draws plastic composite pipe 1 to cutting machine 11, cuts into Len req.
As shown in Figure 1, described plastic composite pipe 1 is made up of the inner plastic pipe 2 of from inside to outside compound, metal bearing course 4, plastics outer covering layer 3 the obtained plastic composite pipe 1 of above-mentioned processing method.Described metal bearing course 4 is made up of the metal tape be wound in outside inner plastic pipe 2.
Inner plastic pipe 2 and plastics outer covering layer 3 adopt the thermoplastic such as polypropylene PP-R, heat-proof polythene PE-RT, and realize internal layer health corrosion-resistant, plastics outer covering layer 3 adopts welding mode to connect safely and reliably; Middle metal bearing course 4 adopts the metal tape such as copper and stainless steel.Inner plastic pipe 2 and plastics outer covering layer 3 adopt extrusion moulding, and metal bearing course 4 adopts wound form to weld, and the inner plastic pipe 2 of extrusion moulding are wound around metal tape 7 and welding forms metal bearing course 4, then mould and cover plastics outer covering layer 3.
The method adopting the present embodiment to provide obtains plastic composite pipe 1, with dn25 × 2.8 (inner clip 0.4mm stainless steel winding pipe, winding angle is 60 °) be example, external diameter ∮ 25mm, wall thickness 2.8mm, weight is 0.385kg/m, use 95 DEG C of medium pressurizes experimental condition of 22 hours, pressure-bearing 6.7MPa crack-free, ne-leakage, suitable with the bearing capacity of ∮ 25.4 × 0.8 stainless steel welding tube, and weight only has 78.6% of pure stainless steel tube ∮ 25.4 × 0.8 weight 0.490kg/m.
Claims (2)
1. a processing method for the plastic composite pipe of inner clip metal bearing course, is characterized in that, concrete steps are as follows:
The first step: the inner plastic pipe (2) being first processed into given size by plastic tube extrusion molding production line (5);
Second step: while inner plastic pipe (2) is at the uniform velocity drawn by hauling machine (10), by wrapping machine (6), metal tape (7) is Wrapping formed in inner plastic pipe (2) outer wall circumference;
3rd step: be welded into metal bearing course (4) by the circumferential winding butt seam along metal tape (7) of bonding machine (8) or overlap edge edge;
4th step: hauling machine (10) traction is outer is covered with the inner plastic pipe (2) of metal bearing course (4) to double layer of metal plastic composite pipe extrusion molding production line (9), double layer of metal plastic composite pipe extrusion molding production line (9) moulds the plastics outer covering layer (3) covering one deck given size outside metal bearing course (4), makes plastic composite pipe (1);
5th step: hauling machine (10) traction plastic composite pipe (1), to cutting machine (11), cuts into Len req;
Described plastic composite pipe (1) is made up of the inner plastic pipe (2) of from inside to outside compound, metal bearing course (4), plastics outer covering layer (3); Described metal bearing course (4) forms by being wound in inner plastic pipe (2) metal tape outward.
2. the processing method of the plastic composite pipe of a kind of inner clip metal bearing course as claimed in claim 1, is characterized in that, in described second step, metal tape (7) is 30 ° ~ 85 ° in the helical angle that inner plastic pipe (2) outer wall is wound around.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310119632.5A CN103195989B (en) | 2013-04-08 | 2013-04-08 | Machining method of plastic composite tube with metal pressure bearing layer clamped inside |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310119632.5A CN103195989B (en) | 2013-04-08 | 2013-04-08 | Machining method of plastic composite tube with metal pressure bearing layer clamped inside |
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| Publication Number | Publication Date |
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| CN103195989A CN103195989A (en) | 2013-07-10 |
| CN103195989B true CN103195989B (en) | 2015-03-25 |
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| CN201310119632.5A Active CN103195989B (en) | 2013-04-08 | 2013-04-08 | Machining method of plastic composite tube with metal pressure bearing layer clamped inside |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104613244A (en) * | 2014-12-01 | 2015-05-13 | 常熟市东涛金属复合材料有限公司 | Metal composite pipe resisting to impacts |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2379679Y (en) * | 1999-06-10 | 2000-05-24 | 赵培成 | Overlapping and winding type steel plastic composite tube |
| CN102777707A (en) * | 2012-07-10 | 2012-11-14 | 浙江双林塑料机械有限公司 | Large-caliber spiral welding steel plastic composite pressure pipe and manufacturing method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19920034A1 (en) * | 1999-04-26 | 2000-11-02 | Modur Consult Gmbh Berlin | Armored thermoplastic pipe for heavy duty applications e.g. offshore mining includes reinforcement of spirally wound strips of grid material or expanded metal |
| CN2439585Y (en) * | 2000-05-21 | 2001-07-18 | 温州南方国欣设备制造有限公司 | Metallic spiral woven net and plastic composite tube |
| CN2472029Y (en) * | 2000-07-06 | 2002-01-16 | 侯贤忠 | Plastic composite pipe with steel net sheath |
| WO2004067269A2 (en) * | 2003-01-31 | 2004-08-12 | Horst Bonn | Plastic-metal composite pipe comprising a metallic double envelope and method and device for producing the same |
| CN201014069Y (en) * | 2006-12-07 | 2008-01-30 | 四川自强科技有限公司 | Steel skeleton plastic composite pipe |
| CN101029698A (en) * | 2007-04-30 | 2007-09-05 | 叶建伟 | Plastic composite pipe with spiral metal tape, its production and use |
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2013
- 2013-04-08 CN CN201310119632.5A patent/CN103195989B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2379679Y (en) * | 1999-06-10 | 2000-05-24 | 赵培成 | Overlapping and winding type steel plastic composite tube |
| CN102777707A (en) * | 2012-07-10 | 2012-11-14 | 浙江双林塑料机械有限公司 | Large-caliber spiral welding steel plastic composite pressure pipe and manufacturing method thereof |
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| CN103195989A (en) | 2013-07-10 |
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