CN101497240A - On-line composition method of steel-plastic composite tube - Google Patents
On-line composition method of steel-plastic composite tube Download PDFInfo
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- CN101497240A CN101497240A CN 200910037370 CN200910037370A CN101497240A CN 101497240 A CN101497240 A CN 101497240A CN 200910037370 CN200910037370 CN 200910037370 CN 200910037370 A CN200910037370 A CN 200910037370A CN 101497240 A CN101497240 A CN 101497240A
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- layer plastic
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Abstract
The invention provides an on-line compounding method for steel-plastic compound pipes. In order to compound a steel pipe and an inner-layer plastic pipe or an outer-layer plastic pipe, the method comprises the following steps that: the inner-layer plastic pipe or the outer-layer plastic pipe of which the pipe diameter approximately corresponds to the inner diameter or outer diameter of the steel pipe is produced on plastic-pipe production equipment; after the inner-layer plastic pipe or the outer-layer plastic pipe is extruded and molded, a certain gap is allowed to exist between the inner-layer plastic pipe or the outer-layer plastic pipe and the inner diameter or outer diameter of the steel pipe through reheating and setting cooling; the inner-layer plastic pipe or the outer-layer plastic pipe is sleeved on the steel pipe; and then the inner-layer plastic pipe or the outer-layer plastic pipe is heated so as to be tightly combined with the steel pipe.
Description
Technical field
The present invention relates to the on-line machining field of pipeline, be specifically related to a kind of online complex method of steel-plastics composite pipe.
Technical background
Required plastic tube all is that size when cooperating according to reality is produced in the at present domestic steel-plastics composite pipe combination process.Compound tense, with external force plastic tube is inserted in the inner surface or the outer surface of steel pipe earlier, then plastic tube is heated, force compoundly afterwards by steam or the gases at high pressure plastic tube after to thermoplastic, utilize assisted recombination conditions such as thermosol to reach the complete compound of steel pipe and plastic tube again.Compound tense, the change in size of plastic tube is little, and therefore, the adhesion major part of compound tense comes from the gummed effect of thermosol.And because present domestic thermosol industry itself can't provide the real compound thermosol material of the material that makes steel pipe and plastic tube opposed polarity, this causes the lifting of the total quality of composite steel tube to be subjected to very big restriction.Though and external thermosol can significantly promote bonding quality, cost an arm and a leg, product lacks the market competitiveness.
Summary of the invention
The objective of the invention is to overcome the problem that exists when existing domestic steel-plastics composite pipe is produced, a kind of online composite methods of simple possible is provided.
In order to realize goal of the invention, adopt following technical scheme:
A kind of online complex method of steel-plastics composite pipe, for carrying out steel pipe and inner layer plastic tube or outer layer plastic tube compound, its main process is for producing inner layer plastic tube or the outer layer plastic tube that caliber and pipe diameter or external diameter roughly coincide on the plastic pipe production equipment, and behind inner layer plastic tube or outer layer plastic tube extrusion molding, cool off by post bake and typing, make it to have certain interval with pipe diameter or external diameter, then inner layer plastic tube or outer layer plastic tube are enclosed within on the steel pipe, again inner layer plastic tube or outer layer plastic tube are heated, make it to combine closely with steel pipe.
The present invention only need need not to force external force plastic tube can be pulled on the steel pipe with between the external diameter certain clearance being arranged in the reducing plastic tube external diameter produced or internal diameter and the steel pipe.Need not high steam or gases at high pressure afterwards, and pure heating can make plastic tube produce the trend that is returned to original size.At this moment, because the inhibition of steel pipe makes steel pipe and plastic tube can reach powerful combining, do not need the effect of thermosol.
In the technique scheme, roughly coincideing of described inner layer plastic tube and pipe diameter is equal to or slightly greater than the internal diameter of steel pipe for the caliber of inner layer plastic tube, and after post bake and typing cooling, the caliber of inner layer plastic tube is slightly little than the internal diameter of steel pipe, to produce certain interval.It is the internal diameter that the caliber of the original moulding of inner layer plastic tube is not less than steel pipe, after through post bake and typing cooling, the caliber of inner layer plastic tube diminishes, conveniently inner layer plastic tube easily is pulled into the steel pipe the inside, inner layer plastic tube has the change main trend that returns to original caliber simultaneously, when in the end heating, can closely touch the inner surface of steel pipe.
Roughly coincideing of described outer layer plastic tube and outer diameter of steel pipes equals or is slightly smaller than the external diameter of steel pipe for the caliber of outer layer plastic tube, and through after post bake and the typing cooling, the caliber of outer layer plastic tube is big slightly than the external diameter of steel pipe, to produce certain interval.It is the external diameter that the caliber of the original moulding of outer layer plastic tube is not more than steel pipe, after through post bake and typing cooling, it is big that the caliber of outer layer plastic tube becomes, conveniently outer layer plastic tube easily is set to outer surface of steel tube, outer layer plastic tube has the trend that diminishes that returns to original caliber simultaneously, when in the end heating, can closely touch the outer surface of steel pipe.
Operate for convenience and ensure the quality of products, described gap is 1～5mm.
Wood described post bake of invention and typing cooling are provided with heater and secondary vacuum typing cooling device by increasing on the plastic tube production equipment, by heater the extrusion equipment of plastic tube production equipment and the inner layer plastic tube or the outer layer plastic tube of Vacuum shaping cooling device extrusion molding are heated, and inner layer plastic tube or outer layer plastic tube are carried out the reducing typing by secondary vacuum typing cooling device.
The caliber that described reducing is fixed to inner layer plastic tube dwindles, or the caliber of outer layer plastic tube is enlarged.
Such scheme is at steel pipe and the compound technical scheme of monolayer plastic pipe (internal layer or skin), in fact, existing steel-plastics composite pipe much all is a three-decker, and promptly the surfaces externally and internally of steel pipe all is coated with plastic pipe layer, so, as follows at the technical scheme that this three-decker adopted:
A kind of online complex method of steel-plastics composite pipe, for carrying out steel pipe and inner layer plastic tube and outer layer plastic tube compound, its main flow process is for to produce in caliber and the steel pipe on the plastic pipe production equipment respectively, inner layer plastic tube and outer layer plastic tube that external diameter roughly coincide, and behind inner layer plastic tube and outer layer plastic tube extrusion molding, cool off by post bake and typing, make it to have certain interval with pipe diameter and external diameter, then inner layer plastic tube and outer layer plastic tube are enclosed within on the steel pipe, simultaneously inner layer plastic tube and outer layer plastic tube are heated again, make it to combine closely with steel pipe.
Other ins and outs of technique scheme are identical with the individual layer composite principle.
The present invention has following beneficial effect:
Plastic tube must be drawn in energy consumption and plant issue in the steel pipe by forcing external force when 1, having overcome existing steel-plastics composite pipe and produce.Because plastic tube that the present invention produced itself and steel pipe have the gap of size, can easily draw in by staff fully;
2, overcome past steel-plastics composite pipe compound tense and wanted auxiliary heat colloidal sol just can carry out complete compound defective, the plastic tube that the present invention produces has memory function, and the trend that is returned to original size is arranged after the heating.As long as plastic tube and the steel pipe set before the reducing have good fit size condition.By pure heating, make plastic tube produce the trend of replying, can reach the close-fitting purpose of steel pipe and plastic tube.
3, reducing technology set forth in the present invention not only can hole enlargement, and can undergauge.This just satisfies the requirement of steel-plastic composite pipe lining and outer lining plastic tube, has expanded the technology approach of steel-plastics composite pipe greatly, has reduced cost, has improved production efficiency.
4, most of device set forth in the present invention need not particular design, is the common equipment of plastic conduit processing.Equipment interoperability is strong, and operational stability and quality can be controlled effectively.
Description of drawings
Fig. 1 is for producing the device structure schematic diagram of plastic pipe layer of the present invention;
Fig. 2 is heater and the secondary vacuum typing cooling device structural representation of Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further detailed.
Implement equipment component structural representation of the present invention as shown in Figure 1, form by the extruder 1 of producing plastic conduit, mould 2, Vacuum shaping and cooler bin 3, hauling machine 4, second heating apparatus 5, secondary vacuum typing and cooler bin 6, second traction machine 7 and a cutting machine 8 and discharging frame 9.Wherein typing of second heating apparatus 5 and secondary vacuum and cooler bin 6 (being equivalent to heater and secondary vacuum typing cooling device) are the key equipments of this device, have the function of preheating, temperature control, reducing and cooling and shaping.Wherein second heating apparatus 5 is that critical piece is the Electrothermal ring 10 of intermediate frequency or thermatron or certain-length.Casing outer front end at secondary vacuum typing and cooler bin has a temperature measuring equipment 11, and this device links to each other with the control system of second heating apparatus, to guarantee to add the accuracy of thermal effect and temperature.The casing front end of secondary vacuum typing and cooler bin is equipped with Vacuum shaping cover 12, and purpose is to reach by bigger negative pressure of vacuum to make softening plastic conduit reducing.Box house at secondary vacuum typing and cooler bin has been covered with high-pressure water mist spray head 13, so that make the rapid cooling and shaping of plastic conduit behind the reducing, the fixedly effect of reducing.
Concrete production stage is produced the plastic conduit that is used for reducing earlier by extruder 1, mould 2, Vacuum shaping and cooler bin 3, carries out reducing and typing accurately through second heating apparatus 5 and secondary vacuum typing and 6 pairs of softening plastic conduits of cooler bin again.Before reducing, earlier pipeline is heated, the intermediate frequency of more efficient or the Electrothermal ring 10 of high-frequency heating or certain-length have been adopted, the temperature measuring equipment 11 of mould assembling external body front end in parallel, the temperature of the plastic conduit after guaranteeing to heat reaches more than the softening point of plastic tube material.Then once draw 4 and the common promotion of second traction 7 under enter into secondary vacuum typing and the cooler bin 6 that has negative-pressure vacuum typing cover 12, and simultaneously with the low-temperature cooling water cooling fast by force of going into not to be higher than 20 ℃.Make just now softening plastic conduit that reducing take place here and be fixed up.Cut, stack according to the production technology of common plastics pipeline afterwards, thereby the plastic tube of reducing is finished in preparation.
Can be inserted in steel pipe according to the production technology of the ordinary steel plastic composite plastic tube after with reducing afterwards, and do last heating, make it tight connection, then can be gathered into the product pipeline after the cooling.
Claims (7)
1, a kind of online complex method of steel-plastics composite pipe, for carrying out steel pipe and inner layer plastic tube or outer layer plastic tube compound, it is characterized in that on the plastic pipe production equipment, producing inner layer plastic tube or the outer layer plastic tube that caliber and pipe diameter or external diameter roughly coincide, and behind inner layer plastic tube or outer layer plastic tube extrusion molding, cool off by post bake and typing, make it to have certain interval with pipe diameter or external diameter, then inner layer plastic tube or outer layer plastic tube are enclosed within on the steel pipe, again inner layer plastic tube or outer layer plastic tube are heated, make it to combine closely with steel pipe.
2, the online complex method of steel-plastics composite pipe according to claim 1, it is characterized in that roughly coincideing of described inner layer plastic tube and pipe diameter is equal to or slightly greater than the internal diameter of steel pipe for the caliber of inner layer plastic tube, and after post bake and typing cooling, the caliber of inner layer plastic tube is slightly little than the internal diameter of steel pipe, to produce certain interval.
3, the online complex method of steel-plastics composite pipe according to claim 1, it is characterized in that roughly coincideing of described outer layer plastic tube and outer diameter of steel pipes equals or be slightly smaller than the external diameter of steel pipe for the caliber of outer layer plastic tube, and after post bake and typing cooling, the caliber of outer layer plastic tube is big slightly than the external diameter of steel pipe, to produce certain interval.
4,, it is characterized in that described gap is 1～5mm according to the online complex method of claim 1 or 2 or 3 described steel-plastics composite pipes.
5, the online complex method of steel-plastics composite pipe according to claim 4, it is characterized in that described post bake and typing cooling are provided with heater and secondary vacuum typing cooling device by increasing on the plastic tube production equipment, by heater the extrusion equipment of plastic tube production equipment and the inner layer plastic tube or the outer layer plastic tube of Vacuum shaping cooling device extrusion molding are heated, and inner layer plastic tube or outer layer plastic tube are carried out the reducing typing by secondary vacuum typing cooling device.
6, the online complex method of steel-plastics composite pipe according to claim 5 is characterized in that the caliber that described reducing is fixed to inner layer plastic tube dwindles, or the caliber of outer layer plastic tube is enlarged.
7, a kind of online complex method of steel-plastics composite pipe, for carrying out steel pipe and inner layer plastic tube and outer layer plastic tube compound, it is characterized in that on the plastic pipe production equipment, producing in caliber and the steel pipe respectively, inner layer plastic tube and outer layer plastic tube that external diameter roughly coincide, and behind inner layer plastic tube and outer layer plastic tube extrusion molding, cool off by post bake and typing, make it to have certain interval with pipe diameter and external diameter, then inner layer plastic tube and outer layer plastic tube are enclosed within on the steel pipe, simultaneously inner layer plastic tube and outer layer plastic tube are heated again, make it to combine closely with steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910037370 CN101497240A (en) | 2009-02-24 | 2009-02-24 | On-line composition method of steel-plastic composite tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910037370 CN101497240A (en) | 2009-02-24 | 2009-02-24 | On-line composition method of steel-plastic composite tube |
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| CN101497240A true CN101497240A (en) | 2009-08-05 |
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| CN 200910037370 Pending CN101497240A (en) | 2009-02-24 | 2009-02-24 | On-line composition method of steel-plastic composite tube |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758544A (en) * | 2014-01-22 | 2014-04-30 | 淮南巨万实业有限责任公司 | Method for additionally arranging anti-corrosion coating on hydraulic-support stand column in hot installation hole shrinkage welding mode |
| CN106273403A (en) * | 2016-08-23 | 2017-01-04 | 南京苏曼等离子科技有限公司 | A kind of glue legal system of overlapping makees the apparatus and method of the long roller of silica gel |
| CN110043719A (en) * | 2019-05-21 | 2019-07-23 | 上海瑞皇管业科技有限公司 | Steel plastic compount antiknock pipe and moulding process |
-
2009
- 2009-02-24 CN CN 200910037370 patent/CN101497240A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758544A (en) * | 2014-01-22 | 2014-04-30 | 淮南巨万实业有限责任公司 | Method for additionally arranging anti-corrosion coating on hydraulic-support stand column in hot installation hole shrinkage welding mode |
| CN106273403A (en) * | 2016-08-23 | 2017-01-04 | 南京苏曼等离子科技有限公司 | A kind of glue legal system of overlapping makees the apparatus and method of the long roller of silica gel |
| CN106273403B (en) * | 2016-08-23 | 2018-05-04 | 南京苏曼等离子科技有限公司 | A kind of apparatus and method for covering glue legal system and making the long roller of silica gel |
| CN110043719A (en) * | 2019-05-21 | 2019-07-23 | 上海瑞皇管业科技有限公司 | Steel plastic compount antiknock pipe and moulding process |
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Open date: 20090805 |