CN1579746A - New method for bonding steel and nonpolar plastics - Google Patents
New method for bonding steel and nonpolar plastics Download PDFInfo
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- CN1579746A CN1579746A CN 03142169 CN03142169A CN1579746A CN 1579746 A CN1579746 A CN 1579746A CN 03142169 CN03142169 CN 03142169 CN 03142169 A CN03142169 A CN 03142169A CN 1579746 A CN1579746 A CN 1579746A
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- steel pipe
- stove
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Abstract
The invention discloses a method of sticking the polyethylene and steel pipe. To produce the steel pipes which is wrapped by polyethylene, besmear the heat polyethylene on the outer surface of the inner polyethylene, then insert into the steel pipe, send into the stove which is used to paste no polarity plastics. It is composed with heat stove and clamp, its character is: long rectangle, double stove wall, a air heat domain exits between the inner wall and the outer wall, heat thread is set in it; there are several resist heat fans are arranged on the top of the stove on the axis direction, open intake according to the stove inner wall and the fans; the bottom of the stove have several intakes on the axis direction; the two sides of the stove also have two gates which can be opened and be closed. The heat thread is set and power supply in segment, and the heat power can be regulated in segment. The clamp is open in one end and close in another end, the open end has column, the close end has a entrance for compress air, between the two ends is taper. A heat glue is besmeared on the outer surface of the steel pipe, then besmear the heat polyethylene outside the glue. This invention can paste no polarity plastics pipe in the steel pipe, wrap no polarity plastics out of the steel pipe, produce the steel pipe with plastics inside and outside of it.
Description
Technical field
The present invention relates to the manufacturing of inside and outside multiple Plastic Steel Pipe, particularly a kind of new method of in steel pipe, firmly gluing the nonpolarity plastics of lining.
Background technology
The zinc pull-up falls in the coating steel pipe, the iron pipe surface corrosion, and ferrobacillus growth, fouling, rust water, polluted water not only, and resistance to water-flow is increased, reduce service life.Promptly outer the covering of inside and outside multiple Plastic Steel Pipe moulded plastic-lined steel pipe, is that the inwall at outer layer pipe serves as a contrast vinyl tube again, coats the vinyon layer outside outer layer pipe.Thereby improve the decay resistance of steel pipe in defeated cold water, hot water, course of gas greatly, keep zinc-plated water conveyance steel tube again and adopted thread connection good airproof performance, cheap advantage, having overcome the defective that the plastic tube that adopts clamping to connect easily leaks and plastic tube is easily aging, is the ideal product of the upgrading of gas transmission water conveyance steel tube.
Iron atom in the steel, out orbit 2 electronics that distributing, 2 electronics can not evenly distribute on sphere, so iron has polarity.Having many plastic molecules that polarity is also arranged, is to follow the chlorine molecule at the sub polyethylene subchain first line of a couplet as polyvinyl chloride, and the outer-shell electron quantity of chlorine atom and hydrocarbon atom is different, causes the outer-shell electron skewness, causes the polyvinyl chloride molecule that polarity is also arranged.
The molecular structure of polyvinyl chloride is as follows:
The iron molecule of polarity is arranged and have the polyvinyl chloride molecule of polarity to bond together by binding agent easily.The plastic lining composite steel pipe of Japan is the multiple polyvinyl chloride of lining mostly, but the chlorine atom in the polyvinyl chloride molecule spins off in illumination with when being heated, and chlorine atom and hydrogen atom are combined into hydrochloric acid, enter in the water polluted water; Polyvinyl chloride wears out because of macromolecular chain looses to take off easily in illumination with when being heated like this.We are the lining vinyl tube when the exploitation steel-plastics composite pipe.Polyethylene is the pure carbon hydrogen compound, and the sub polyethylene minor is:
Do not add any additives, performance is good, is difficult for aging.But the other hydrogen atom that distributing equably of carbon atom in the polyethylene molecule, the polyethylene molecule is non-polar.Having between the iron of polarity and the non-polar polyethylene is to be difficult to bonding, becomes the difficult problem of plastic lining composite steel pipe in producing.
Coating steel pipe can not use because of not corrosion-resistant with burying, and covering the plastic layer plastic lining composite steel pipe outward can use with burying, solves the corrosion-resistant problem of composite steel tube outer surface.
Require steel pipe to cover between vinyon layer and the steel pipe outward and bond well, guarantee that the steel pipe band covers the plastic layer cutted thread outside.Covering plastic layer outward can not arch upward and the absciss layer phenomenon.
The present invention solves the bonding difficult problem of interior vinyl tube of steel pipe and steel pipe, has solved steel pipe again and has covered the difficult problem that bonds between vinyon layer and the steel pipe outward.
The technical problem to be solved in the present invention is to overcome above-mentioned prior art and is difficult for bonding at the nonpolarity polyethylene of inner lining of steel pipe, the problem of a large amount of bubbles occurs, and a kind of method is provided again, guarantees that steel pipe coats polyethylene and steel pipe secure bond outward.
Technical solution of the present invention is: a kind of PUR is coated in the outer surface of the vinyl tube of uniform temperature under molten condition.Insert then in the steel pipe, send into compound heating furnace; A kind of heating stove and accessory that is used for the nonpolarity plastics of firmly sticking lining in the steel pipe comprises heating furnace and anchor clamps, and be characterized in: this heating furnace is long rectangular configuration, and the furnace wall is double-deck, is the air heat district between stove inwall and furnace outer wall, and heating wire is set in the district; The top of this heating furnace is provided with a plurality of heat-resisting fans vertically equably, at the corresponding ventilating opening that offers with fan of furnace roof inwall; This heating furnace bottom end inwall vertically offers a plurality of ventilating openings equably; These heating furnace two ends also are provided with fire door to be opened/closed.Said heating wire is that segmentation is provided with sectional power supply, and its electrical heating power is that segmentation is adjustable.This anchor clamps one end is uncovered, other end sealing, and its opening end has inner cylinder face, and the central authorities of blind end establish compressed air inlet, have internal conical surface between opening end and the blind end; A kind of PUR is coated in the outer surface of steel pipe under molten condition, steel pipe had been heated to uniform temperature at that time, the vinyon of fusion is coated in again the outer surface of PUR.
Description of drawings
Fig. 1 is that the heating furnace master looks schematic diagram.
Fig. 2 is Figure 1A A profile.
Fig. 3 is anchor clamps and uses scheme of installation.
Fig. 4 is composite pipe structure figure.
Among the figure:
The 1-heating furnace, 2-anchor clamps, 3-steel pipe, 4-lined with polyethylene pipe
5-coats polyethylene layer outward, 6-internal lining pipe hot melt adhesive layer, and 7-coats hot melt adhesive layer outward
11-stove inwall, the 12-furnace outer wall, the 13-ventilating opening, the 14-ventilating opening,
15-air heat district, the 16-fan, the 21-inner cylinder face, the 22-internal conical surface,
The 23-blind end, 24-compressed air inlet, 25-gas outlet.
The specific embodiment
A kind of steel and nonpolarity plastic bonding new method.See also Fig. 4 earlier, 4 is the lined with polyethylene pipe, and the hot melt adhesive layer 6 of fusion is coated in lined with polyethylene pipe 4 outer surfaces, then lined with polyethylene pipe 4 is inserted the endoporus of steel pipe 3.Then the steel pipe 3 that inserts lined with polyethylene pipe 4 is sent in the multiple tube heating furnace.See also Fig. 1 and Fig. 2, Fig. 1 is that heating furnace master of the present invention looks schematic diagram, Fig. 2 is the AA profile of Fig. 1, as seen from the figure, heating furnace 1 profile of the present invention has long rectangular configuration, the furnace wall is double-deck, between stove inwall 11 and furnace outer wall 12, be air heat district 15, heating wire (not drawing among the figure) is set in the district, the top of this heating furnace 1 is laid with a plurality of heat-resisting fans 16 vertically equably, at furnace roof inwall 11 and the fan 16 corresponding ventilating openings 14 that offer, this heating furnace 1 bottom end inwall 11 vertically offers a plurality of ventilating openings 13 equably, these heating furnace 1 two ends also are provided with fire door to be opened/closed (not drawing among the figure), when the heating wire energising, air heat to air heat district 15, air between stove inwall 11 and the furnace outer wall 12 is heated by heating wire, rise, being both top fan 16 starts, force hot-air to suck the heated body (for example steel pipe) that also passes through in the stove from top to bottom by ventilating opening 14, again from interlayer air heat district 15 that bottom ventilating opening 13 enters stove inwall 11 and furnace outer wall 12 by the heating wire heating, constitutes the closed circuit heat cycles of the interior hot-air of a stove.So, formed a uniform thermal field in the stove, changed the big disadvantage of the traditional heating stove upper heat and lower cold temperature difference, the temperature difference is constant in the whole stove is no more than 2 ℃.
Especially after the heating wire in air heat district 15 adopts segmentation that sectional power supply is set, the words that its electrical heating power segmentation is controlled, not only can control the interior temperature of stove of whole heating furnace, also can control heating furnace Temperature Distribution is vertically changed to some extent, can form the thermal field that is more suitable for the nonpolarity plastics of firmly sticking lining in steel pipe and distribute.
Another important content that the present invention heats stove and accessory is exactly to have designed special anchor clamps, as shown in Figure 3, Fig. 3 is the utility model anchor clamps and uses scheme of installation, the outward appearance of these anchor clamps 2 is cylindric, and the one end is uncovered, other end sealing, opening end has inner cylinder face 21, the central authorities of blind end 23 are provided with compressed air inlet 24, have internal conical surface 22 between opening end and the blind end, and inner cylinder face 21 also leaves gas outlet 25.
Use of the present invention is roughly as follows:
1, connect power supply, the heating wire in the heating furnace 1 in the air thermal treatment zone 15 adds hot-air, and under the driving of fan 16, the air heating that constantly circulates reaches polyethylene pipe and heat fusing temperature up to temperature in the heating furnace chamber;
2, be inserted in the steel pipe 3 after coating PUR outside the polyethylene pipe 4, it is longer than steel pipe 3 to mould pipe 4;
3, anchor clamps 2 are enclosed within steel pipe 3 and mould pipe 4 two ends, as shown in Figure 3, because the internal conical surface 22 of anchor clamps 2 can be guaranteed to manage 4 and still can contact closely with the internal conical surface 22 of anchor clamps 2 when moulding when changing when pipe 4 external diameters and length are heated, moulding;
4, will be with the steel pipe 3 of anchor clamps 2 and mould the pipe 4 usefulness dollies push the heating furnace 1 from heating furnace 1 end face, when being raised to plastic tube 4, temperature takes place softening the time, having tracheae that compressed air is fed through compressed air inlet 24 outside stove after steel pipe is packed in the stove moulds in the pipe 4, mould pipe 4 and be close to anchor clamps 2 inwalls, thereby the cavity of moulding pipe 4 and anchor clamps 2 formations is being sealed well, can not leak gas, make and remain bigger pressure in the cavity, under bigger pressure effect, make steel pipe 3 and mould between the pipe 4 to bond together securely.
25 is the gas outlet among Fig. 3, under the bigger pressure effect, moulds pipe 4 and begins to expand at high temperature and in cavity, and steel pipe 3 and the air moulded in the gap between the pipe 4 are driven out of, and gas outlet 25 is passages that air is driven out of.Be lined with the steel pipe 3 outer surfaces coating hot melt adhesive layer 7 of polyethylene pipe 4 among Fig. 4, outside hot melt adhesive layer 7, the polyethylene layer 5 of coated with melted.
The experiment proved that, utilize PUR 6,7 of the present invention, utilize heating furnace 1 to make interior fine control of temperature energy of stove, remain bigger pressure, make between steel pipe 3 and the non-polar plastic tube 4 to bond together securely because anchor clamps 2 of the present invention make in the cavity of moulding pipe 4 and anchor clamps 2 formations.And make between steel pipe 3 and the nonpolarity plastic layer 5 and bond together securely.Adopting the present invention to carry out steel pipe successfully produces the firm liner of bubble-free bonding with polyethylene bonding and moulds outer coating composite steel tube.
Claims (6)
1. one kind the new method of secure bond between non-polar polyethylene and the steel pipe; A kind of lined with polyethylene (4), cover the steel pipe of polyethylene (5) outward, a kind of hot melt adhesive layer of fusion (6) is coated in lined with polyethylene (4) outer surface, then lined with polyethylene pipe (4) is inserted the endoporus of steel pipe (3), then steel pipe (3) is sent in the heating stove and accessory of the present invention.
2. a heating stove and accessory that is used for the nonpolarity plastics of firmly sticking lining in the steel pipe comprises heating furnace (1) and anchor clamps (2), it is characterized in that:
1. this heating furnace (1) is long rectangular configuration, and the furnace wall is double-deck, stove inwall (11) and furnace outer wall (12) it
Between be air heat district (15), heating wire is set in the district;
2. the top of this heating furnace is provided with a plurality of heat-resisting fans (16) vertically equably, at furnace roof inwall (11)
Fan (16) locates to be provided with ventilating opening (14);
3. this heating furnace bottom end inwall (11) vertically offers a plurality of ventilating openings (13) equably;
4. these heating furnace two ends also are provided with fire door to be opened/closed.
3. heating stove and accessory according to claim 2 is characterized in that said heating wire is that segmentation is provided with sectional power supply, and its electrical heating power is that segmentation is adjustable.
4. heating stove and accessory according to claim 2, it is characterized in that said anchor clamps (2) one ends are uncovered, add end sealing, its opening end has inner cylinder face (21), the central authorities of blind end (23) establish compressed air inlet (24), have internal conical surface (22) between opening end and the blind end (23).
5. heating stove and accessory according to claim 3 is characterized in that the inner cylinder face (21) of the opening end of said anchor clamps (2) also leaves gas outlet (25).
6. the PUR of a molten condition (7) is coated in the outer surface of steel pipe (3), and steel pipe (3) had been heated to uniform temperature at that time, the vinyon of fusion (5) is coated in again the outer surface of PUR (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03142169 CN1579746A (en) | 2003-08-11 | 2003-08-11 | New method for bonding steel and nonpolar plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03142169 CN1579746A (en) | 2003-08-11 | 2003-08-11 | New method for bonding steel and nonpolar plastics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1579746A true CN1579746A (en) | 2005-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03142169 Pending CN1579746A (en) | 2003-08-11 | 2003-08-11 | New method for bonding steel and nonpolar plastics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1579746A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319732C (en) * | 2005-12-15 | 2007-06-06 | 江苏联冠科技发展有限公司 | Process for combining ultrahigh molecular weight polyethylene tubing and steel tube |
| CN103862668A (en) * | 2014-03-20 | 2014-06-18 | 山东齐鲁武峰塑料制品有限公司 | Preparation technology of composite PVC (polyvinyl chloride)-0 pipe |
| CN103964383A (en) * | 2014-05-05 | 2014-08-06 | 福建省邵武市永晶化工有限公司 | Plastic-lined equipment and method for producing hydrofluoric acid through plastic-lined equipment |
-
2003
- 2003-08-11 CN CN 03142169 patent/CN1579746A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319732C (en) * | 2005-12-15 | 2007-06-06 | 江苏联冠科技发展有限公司 | Process for combining ultrahigh molecular weight polyethylene tubing and steel tube |
| CN103862668A (en) * | 2014-03-20 | 2014-06-18 | 山东齐鲁武峰塑料制品有限公司 | Preparation technology of composite PVC (polyvinyl chloride)-0 pipe |
| CN103964383A (en) * | 2014-05-05 | 2014-08-06 | 福建省邵武市永晶化工有限公司 | Plastic-lined equipment and method for producing hydrofluoric acid through plastic-lined equipment |
| CN103964383B (en) * | 2014-05-05 | 2015-12-30 | 福建省邵武市永晶化工有限公司 | A kind of lining is moulded equipment and is produced the method for hydrofluoric acid |
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