CN105170422A - Production method of plastic-coated pipe - Google Patents
Production method of plastic-coated pipe Download PDFInfo
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- CN105170422A CN105170422A CN201510694941.4A CN201510694941A CN105170422A CN 105170422 A CN105170422 A CN 105170422A CN 201510694941 A CN201510694941 A CN 201510694941A CN 105170422 A CN105170422 A CN 105170422A
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- steel pipe
- powder
- spray gun
- work box
- interior
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- 239000004033 plastic Substances 0.000 title claims abstract description 31
- 229920003023 plastic Polymers 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000007921 spray Substances 0.000 claims abstract description 144
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 126
- 239000010959 steel Substances 0.000 claims abstract description 126
- 239000000843 powder Substances 0.000 claims abstract description 123
- 238000005507 spraying Methods 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000007590 electrostatic spraying Methods 0.000 claims abstract description 13
- 238000005554 pickling Methods 0.000 claims abstract description 12
- 230000001360 synchronised effect Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 239000004753 textile Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000000576 coating method Methods 0.000 abstract description 14
- 239000011248 coating agent Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 12
- 239000006223 plastic coating Substances 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000011010 flushing procedure Methods 0.000 abstract 1
- 206010044565 Tremor Diseases 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229940098458 powder spray Drugs 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010410 dusting Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005686 electrostatic field Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 102000004142 Trypsin Human genes 0.000 description 1
- 108090000631 Trypsin Proteins 0.000 description 1
- 238000005269 aluminizing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
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- 239000012588 trypsin Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a production method of a plastic-coated pipe. The production method is characterized by including the following steps of putting a steel pipe into a pickling tank to be subjected to pickling and derusting, flushing the steel pipe subjected to pickling through clear water, cleaning and drying the steel pipe for standby application, heating the obtained steel pipe at the medium frequency, synchronously coating the inner portion and the outer portion of the steel pipe with plastic through an electrostatic spraying method, conducting heating and solidifying, and conducting natural cooling. The plastic coating work conducted through an electrostatic spraying line is adopted for synchronous plastic coating. The electrostatic spraying line comprises a steel pipe conveying device, an outer spraying device, an inner spraying device and a powder recycling device. The method is simple and convenient to use, the production efficiency can be improved, spray gun shaking can be avoided, powder spraying is uniform, and the powder utilization rate is high.
Description
Technical field:
The present invention relates to pipe technology field, be specifically related to a kind of production method of plastics coated tube.
Background technology:
The coating pipe of steel pipe has galvanized pipe, the steel pipe of aluminize pipe, chromium-plated tube, aluminizing pipe and other alloy-layers.Coated pipe has external coating pipe, undercoating pipe, inside and outside coating pipe.The coating of usual employing has the corrosion-inhibiting coating material of plastics, epoxy resin, coal tar epoxy and various glass mould.Coating steel pipes forms in inwall (when needing outer wall also can) applied plastic through powder melts spraying technology, its excellent performance.Compared with galvanized pipe, there is anticorrosive, non-corrosive, not incrustation, smooth smoothness, clean nontoxic, the advantages such as long service life.According to test, the service life of steel-plastics composite pipe is more than three times of galvanized pipe.Compared with plastic tube, there is mechanical strength high, the advantage such as withstand voltage, good heat resistance.Because matrix is steel pipe, so there is not embrittlement, problem of aging.The fluid conveyings such as running water, coal gas, chemical products and heating engineering can be widely used in.
Plastic-coated steel is that applied plastic forms on large-caliber spiral welded tube and ratio-frequency welded tube basis, application of polyvinyl (PVC) can be needed according to different, polyethylene (PE), the plastic coating of the various different performances such as epoxy resin (EPOZY), adhesive force is good, corrosion resistance is strong, can resistance to strong acid, highly basic and other chemical attack, nontoxic, not corrosion, wear-resisting, shock-resistant, osmotic-pressure-tolerant is strong, pipe surface is smooth, do not adhere to any material, resistance during conveying can be reduced, improve flow and transfer efficiency, reduce discharge pressure loss, by updating the Recipe of powdery paints, make that the respective coatings performance of formation is more outstanding has become inevitable.Solvent-free in coating, can not material be oozed out, thus can not pollute carried medium, thus ensure clarity and the wholesomeness of fluid, can cold cycling be used alternatingly-40 DEG C to+80 DEG C scopes, not aging, do not chap, thus can use under the environment that cold zone etc. is harsh.
Existing technique, as Chinese patent application CN101823044A discloses the method for a kind of steel pipe inside and outside wall powder spraying, curing film forming integration, use portable spraying and heating apparatus, powder spray and heating cure are carried out simultaneously, adopt draw-gear, the gentle spraying that adds of steel pipe is at the uniform velocity advanced, steel pipe along orbital direction erection in orbit, railcar is across on steel pipe, interior gunjet rack to be located on travel(l)ing rest and to be placed in steel pipe, railcar and travel(l)ing rest are connected on draw-gear by steel wire rope, railcar internal fixtion electromagnetic heating device and outer spray gun, air pump is connected on electrostatic spraying apparatus by ventilation duct, electrostatic spraying apparatus is connected on railcar and interior spray gun by powder delivery hose.This mode inside and outside wall synchronously sprays, Synchronous Heating solidification, simplifies processing procedure.And the mode of this synchronous spraying has become the main flow in market.But defect is as follows: 1, steel pipe maintains static, cause outer spray uneven, namely bottommost sprayed coating is thin, 2, inside and outside spray gun moves to opposite side from side, then reset; Then just can carry out the spraying of next steel pipe, efficiency is not high, and Powder Recovery is under-utilized, and the waste of plastic-coated powder is serious.3, travel(l)ing rest is by steel wire traction, and existing defects is as follows, and support is positioned at pipeline, easily makes spraying position generation cut, and 4, rope traction makes travel(l)ing rest when pipe end takes out, or all not easy to operate when being placed into other end original position.5, there are problems in Synchronous Heating solidification, and because electromagnetic heating device cannot cover pipeline entirety, and electromagnetic heating device constantly moves, and cause heating uneven, solidification effect is bad.So, substantially abandon the mode of Synchronous Heating solidification at present, and adopted the unified case that is heating and curing, whole steel pipe can have been held and carry out entirety heating.
For solving upper part technical problem, there is the spray gun of some rigidity on the market, i.e. steel tube end part erection spray gun, promote spray gun by travelling car to advance, track is laid in travelling car bottom, but, move to the other end from pipeline one end, the long end that causes of spray gun length is trembleed, to dust inequality, and the orbital distance that long pipeline necessarily supports the travelling car of spray gun increases, add floor space, plant area's utilization rate is greatly reduced.But but the length reducing rigid lance cannot solve longer pipeline (such as more than 8 meters) spraying.In view of this technical problem, need to occur that a kind of method is simple, easy to use, can enhance productivity, avoid spray gun to tremble, production method that is even and a kind of plastics coated tube that powder using efficiency is high of dusting.
Summary of the invention:
The object of the invention is to overcome the shortcoming existed in prior art, provide a kind of method simple, easy to use, can enhance productivity, avoid spray gun to tremble, production method that is even and a kind of plastics coated tube that powder using efficiency is high of dusting.
To achieve these goals, the invention provides a kind of production method of plastics coated tube, wherein, comprise the steps:
A. steel pipe is put in pickling tube, carries out acid pickling and rust removing operation,
B. the steel pipe clear water after pickling is rinsed well and dries, for subsequent use,
C. to the steel pipe heating in medium frequency of step B gained,
D. electrostatic spray is to plastic-coated synchronous inside and outside steel pipe,
E. be heating and curing,
F. Temperature fall.
Step D uses electrostatic spraying line to carry out plastic-coated operation, and electrostatic spraying line comprises steel pipe conveyer, outer spray coating device, inner spray coating device and powder recovering device.
Steel pipe conveyer comprises operation track, operation track is provided with two travelling cars, the bottom of travelling car is provided with road wheel, road wheel and operation track match, the top of each travelling car is integrated is provided with slide rail, slide rail on each travelling car slidably connects two motor cabinets, the side of motor cabinet is provided with frame plate, be fixedly connected with between frame plate with travelling car, motor cabinet is fixed with steel pipe rotary electric machine and shaft coupling, the output shaft of steel pipe rotary electric machine is fixedly connected with one end of shaft coupling, the other end of shaft coupling is provided with power transmission shaft, power transmission shaft is connected with the countershaft of frame plate, the middle part of power transmission shaft is fixed with moving runner, the integrated groove being provided with L shape in the edge of moving runner, steel pipe rotary electric machine drives moving runner to rotate by shaft coupling, groove place erection on moving runner on two travelling cars has steel pipe, moving runner makes steel pipe original place rotate, two travelling cars change in the upper distance of operation track with the steel pipe adapting to different length, by bolt, motor cabinet be fixed on slide rail and then regulate the distance of two motor cabinets, namely have adjusted the spacing of two moving runners to adapt to the steel pipe of different tube diameters.
Outer spray coating device comprises two work boxs and two groups of work box tracks, work box track is positioned at the both sides of operation track, the side of each work box is provided with the outer powder case of spray, opposite side is provided with collection box, work box is n shape, one sidewall of work box is fixed with how exclusive spray gun, adjacent two exclusive spray guns are intersected with each other, intersecting angle is 30-60 degree, another side shaft of work box is connected with brush axle, brush spindle motor is provided with above brush axle, brush spindle motor is positioned at work box, the output shaft of brush spindle motor is fixedly connected with brush axle, brush axle is socketed with suction plastering roller, inhaling plastering roller is superfine fibre textile, blower fan and powder falling storehouse is provided with in collection box, integrated being provided with of the sidewall of collection box inhales powder mouth, inhale plastering roller and be positioned at the side of inhaling powder mouth, spray in outer powder case and be provided with pump box, pump box drives powder along outer lance ejection on outer wall of steel pipe, the lower hook of work box hangs with backplate. and the bottom of backplate is integrated is provided with half slot, half slot is the top with steel pipe, spray outer powder case, the bottom of collection box is provided with road wheel and road wheel and work box track match.
Inner spray coating device comprises two interior spray gun walking casees, interior spray gun is positioned at the outside of corresponding travelling car with spray gun walking case in powder case in spray, the bottom of interior spray gun walking case is provided with road wheel and road wheel and operation track match, the middle part of interior spray gun walking case is provided with stationary pipes, stationary pipes is socketed with extension tube, one end end winding support of extension tube has interior spray gun, one end of extension tube is connected with powder case in spray by tube connector, the upper and lower both sides of tube wall of stationary pipes are fixed with two groups of adjusting bolts, the bottom of interior spray gun walking case is fixed with base plate, adjusting bolt and base plate, the top of interior spray gun walking case is threaded, the height of the precession of adjusting bolt or back-out and then adjustment stationary pipes distance base plate, namely the height that have adjusted interior spray gun distance ground adapts to the steel pipe of different tube diameters to make interior spray gun and guarantees that interior spray gun is suspended from the circle centre position of this steel pipe, pump box is provided with in powder case in spray, pump box drives powder along extension tube, interior spray gun ejection, extension tube is steel part.
Powder recovering device comprises and connects powder groove, connecing powder groove is fixed between operation track, connect powder slot immediately below steel pipe, work box is across the top connecing powder groove, the powder fractions of outer spray gun ejection falls within and connects in powder groove, connect the middle part of powder groove, two ends are one-body molded is respectively provided with Ji Fenkou, the cross section connecing powder groove is semicircle shape, the bottom connecing powder groove is plugged and connected with mozzle, multiple mozzle is connected by recovery tube, recovery tube is connected with collection box, the both sides of the half slot of backplate are integrated is provided with link, link is hooked with rubber flap, rubber flap is semicircle shape, rubber flap is along with two work box motions and then be pushed into by the powder connect in powder groove near collection powder mouth, the suction of the blower fan in collection box will inhale plastering roller, the powder connect on powder groove sucks collection box and drops in powder falling storehouse.
The job step of step D is:
First, according to the spacing of steel pipe length adjustment two travelling cars, and travelling car is fixed on operation track by fixture block; Distance between the motor cabinet regulating each travelling car according to the thickness of steel pipe caliber, adjusting bolt in regulating on spray gun walking case, interior spray gun is made to be positioned at the circle centre position of this kind of steel pipe, steel pipe after heating in medium frequency hangs in the groove place of the moving runner of travelling car by overhead traveling crane, steel pipe rotary electric machine synchronously, in the same way moves, and steel pipe rotates along with the rotation original place of moving runner;
Secondly, two work boxs are made to be positioned at the two ends of steel pipe, interior spray gun is positioned at the two ends of steel pipe, two interior spray gun walking casees are to entering and be 5-10s to the time difference of entering, two work boxs are to entering and be 5-10s to the time difference of entering, the travel distance of two interior spray gun walking casees, work box is all set as the 1/2+15cm of steel pipe length, and namely, interior spray gun walking case, work box move to+15cm place in the middle part of steel pipe, then return; Because to advance life period difference, in one of them after spray gun walking case, work box return, spray gun walking case in another, work box have advanced to 1/2 place close to steel pipe length, seam crossing are repeated spraying.
Stepper motor (i.e. movable motor) is provided with, for driving its motion or retreating on work box, on interior spray gun walking case.
The present invention adopts electrostatic hot spray process to carry out powder spray, namely high-pressure electrostatic corona field principle is utilized, using coated steel pipe ground connection as positive pole, in, outer spray gun spray nozzle connects high pressure negative electrode, make to form a powerful electric field between spray gun and steel pipe, steel pipe is after Medium frequency induction coil heats, pump box produces compressed air by powder from powder case in spray, spray outer powder case and deliver to spray gun ejection, aciculiform electroplax on shower nozzle produces corona discharge, make the powder flowed through with negative electrical charge, under the double action of electrostatic field and carrier gas, orientation flies to steel pipe internal-surface, become molten condition immediately, again pipeline is sent into baking-curing in curing oven, temperature controls at 225-260 DEG C, Temperature fall, strengthens the adhesive force of powder.Namely plastics coated tube is become.During spraying, there is the inclination angle of 15-45 degree in spray gun and tube wall.
Advantage of the present invention is: method is simple, easy to use, can enhance productivity, avoid spray gun tremble, dusts even and powder using efficiency is high.Be specially:
1, the present invention adopts the mode entered, and to entering life period difference, make often to organize interior spray gun, object for appreciation spray gun all arrives steel pipe 1/2+15cm distance, what namely there is 15cm repeats spraying place, both saved general spray time, seam crossing perfection docking while improve operating efficiency, can have been made again.
2, the present invention adopts the mode entered, and namely the interior spray gun of rigidity can be the half length of conventional lance, is painted with example with 12 meters of steel tube inner sprays, spray gun in if the extension tube of 12 meters is fixing, along with motion, the vibration of extension tube end is serious, greatly affects the coating quality in pipe.And adopt entering mode, decrease the distance of extension tube half, namely extension tube 6 meters can realize, and vibration obviously reduces, and in pipe, coating quality is good.
3, the present invention reclaims by inhaling plastering roller while spraying outside, connecing being reclaimed by Ji Fenkou in powder groove, greatly reducing the waste situation of powder for dropping into.(excessive powder in pipe is collected well, only blows to opposite side with from side, and is positioned at pipe, there will not be the situation of pollution, and the powder outside pipe becomes easily infected by dust, iron filings etc., so focus on the recycling of managing outer powder.）
Accompanying drawing illustrates:
Fig. 1 is the structural representation of electrostatic spraying line of the present invention.
Fig. 2 is the structural representation of steel pipe conveyer of the present invention.
Fig. 3 is the side view of Fig. 2.
Structural representation when Fig. 4 is outer spray coating device operation of the present invention.
Fig. 5 is the structural representation of spray gun walking case in the present invention.
Fig. 6 is the schematic top plan view connecing powder groove of the present invention.
Fig. 7 is the view connecing the recovery powder of powder groove of the present invention
Detailed description of the invention:
Below in conjunction with accompanying drawing, the present invention will be described.As shown in Fig. 1-Fig. 7, Fig. 1 is the structural representation of electrostatic spraying line of the present invention.Fig. 2 is the structural representation of steel pipe conveyer of the present invention.Fig. 3 is the side view of Fig. 2.Structural representation when Fig. 4 is outer spray coating device operation of the present invention.Fig. 5 is the structural representation of spray gun walking case in the present invention.Fig. 6 is the schematic top plan view connecing powder groove of the present invention.Fig. 7 is the view connecing the recovery powder of powder groove of the present invention
The production method of a kind of plastics coated tube of the present invention, wherein, comprises the steps:
A. steel pipe is put in pickling tube, carries out acid pickling and rust removing operation,
B. the steel pipe clear water after pickling is rinsed well and dries, for subsequent use,
C. to the steel pipe heating in medium frequency of step B gained,
D. electrostatic spray is to plastic-coated synchronous inside and outside steel pipe,
E. be heating and curing,
F. Temperature fall.
Step D uses electrostatic spraying line to carry out plastic-coated operation, and electrostatic spraying line comprises steel pipe conveyer, outer spray coating device, inner spray coating device and powder recovering device.
Steel pipe conveyer comprises operation track 11, operation track 11 is provided with two travelling cars 9, the bottom of travelling car 9 is provided with road wheel 10, road wheel 10 and operation track 11 match, the top of each travelling car 9 is integrated is provided with slide rail, slide rail on each travelling car 9 slidably connects two motor cabinets 8, the side of motor cabinet 8 is provided with frame plate 2, be fixedly connected with between frame plate 2 with travelling car 9, motor cabinet 8 is fixed with steel pipe rotary electric machine 7 and shaft coupling 1, the output shaft of steel pipe rotary electric machine 7 is fixedly connected with one end of shaft coupling 1, the other end of shaft coupling 1 is provided with power transmission shaft, power transmission shaft is connected with the countershaft of frame plate 2, the middle part of power transmission shaft is fixed with moving runner 2, the integrated groove being provided with L shape in the edge of moving runner, steel pipe rotary electric machine 7 drives moving runner 6 to rotate by shaft coupling 1, groove 3 place erection on moving runner 6 on two travelling cars 9 has steel pipe 4, moving runner 6 makes steel pipe 4 original place rotate, two travelling cars 9 change in the upper distance of operation track 11 with the steel pipe 4 adapting to different length, by bolt, motor cabinet 8 be fixed on slide rail and then regulate the distance of two motor cabinets 8, namely have adjusted the spacing of two moving runners 6 to adapt to the steel pipe 4 of different tube diameters.
Outer spray coating device comprises two work boxs 13 and two groups of work box tracks 19, work box track 19 is positioned at the both sides of operation track 11, the side of each work box 13 is provided with the outer powder case 12 of spray, opposite side is provided with collection box 18, work box 13 is in n shape, one sidewall of work box 13 is fixed with how exclusive spray gun 14, adjacent two exclusive spray guns 14 are intersected with each other, intersecting angle is 30-60 degree, another side shaft of work box 13 is connected with brush axle 16, brush spindle motor is provided with above brush axle 16, brush spindle motor is positioned at work box 13, the output shaft of brush spindle motor is fixedly connected with brush axle 16, brush axle 16 is socketed with and inhales plastering roller 17, inhaling plastering roller 17 is superfine fibre textile, blower fan and powder falling storehouse is provided with in collection box 18, integrated being provided with of the sidewall of collection box 18 inhales powder mouth, inhale plastering roller 17 and be positioned at the side of inhaling powder mouth, spray in outer powder case 13 and be provided with pump box, pump box drives powder to be ejected on steel pipe 4 outer wall along outer spray gun 14, the lower hook of work box 13 hangs with that the bottom of backplate 15. backplate 15 is integrated is provided with half slot, half slot is the top with steel pipe 4, spray outer powder case 12, the bottom of collection box 18 is provided with road wheel and road wheel and work box track 19 match.
Inner spray coating device comprises two interior spray gun walking casees 22, interior spray gun 26 and the interior powder case 20 of spray, interior spray gun walking case 22 is positioned at the outside of corresponding travelling car 9, the bottom of interior spray gun walking case 22 is provided with road wheel and road wheel and operation track 11 match, the middle part of interior spray gun walking case 22 is provided with stationary pipes 23, stationary pipes 23 is socketed with extension tube 25, one end end winding support of extension tube 25 has interior spray gun 26, one end of extension tube 25 is connected with powder case 20 in spray by tube connector, the upper and lower both sides of tube wall of stationary pipes 23 are fixed with two groups of adjusting bolts 21, the bottom of interior spray gun walking case 22 is fixed with base plate 24, adjusting bolt 21 and base plate, the top of interior spray gun walking case 22 is threaded, the precession of adjusting bolt 21 or back-out and then regulate stationary pipes 23 apart from the height of base plate 24, namely the height that have adjusted interior spray gun distance ground adapts to the steel pipe of different tube diameters to make interior spray gun 26 and guarantees that interior spray gun 26 is suspended from the circle centre position of this steel pipe, pump box is provided with in powder case 20 in spray, pump box drives powder along extension tube 25, interior spray gun 26 sprays, extension tube 25 is steel part.
Powder recovering device comprises and connects powder groove 5, connecing powder groove 5 is fixed between operation track 11, connecing powder groove 5 is positioned at immediately below steel pipe, work box 13 is across the top connecing powder groove 5, the powder fractions that outer spray gun 14 sprays falls within and connects in powder groove 5, connect the middle part of powder groove 5, two ends are one-body molded is respectively provided with collection powder mouth 29, the cross section connecing powder groove 5 is semicircle shape, the bottom connecing powder groove 5 is plugged and connected with mozzle 30, multiple mozzle 30 is connected by recovery tube 31, recovery tube 31 is connected with collection box 18, the both sides of the half slot of backplate 15 are integrated is provided with link 28, link 28 is hooked with rubber flap, rubber flap is semicircle shape, rubber flap is along with two work box motions and then be pushed into by the powder connect in powder groove near collection powder mouth 29, the suction of the blower fan in collection box 18 will inhale plastering roller 17, the powder connect on powder groove 5 sucks collection box 18 and drops in powder falling storehouse.
Stepper motor (i.e. movable motor 27) is provided with, for driving its motion or retreating on work box, on interior spray gun walking case.
The job step of step D is:
First, according to the spacing of steel pipe length adjustment two travelling cars, and travelling car is fixed on operation track by fixture block; Distance between the motor cabinet regulating each travelling car according to the thickness of steel pipe caliber, adjusting bolt in regulating on spray gun walking case, interior spray gun is made to be positioned at the circle centre position of this kind of steel pipe, steel pipe after heating in medium frequency hangs in the groove place of the moving runner of travelling car by overhead traveling crane, steel pipe rotary electric machine synchronously, in the same way moves, and steel pipe rotates along with the rotation original place of moving runner;
Secondly, two work boxs are made to be positioned at the two ends of steel pipe, interior spray gun is positioned at the two ends of steel pipe, two interior spray gun walking casees are to entering and be 5-10s to the time difference of entering, two work boxs are to entering and be 5-10s to the time difference of entering, the travel distance of two interior spray gun walking casees, work box is all set as the 1/2+15cm of steel pipe length, and namely, interior spray gun walking case, work box move to+15cm place in the middle part of steel pipe, then return; Because to advance life period difference, in one of them after spray gun walking case, work box return, spray gun walking case in another, work box have advanced to 1/2 place close to steel pipe length, seam crossing are repeated spraying.
The present invention adopts electrostatic hot spray process to carry out powder spray, namely high-pressure electrostatic corona field principle is utilized, using coated steel pipe ground connection as positive pole, in, outer spray gun spray nozzle connects high pressure negative electrode, make to form a powerful electric field between spray gun and steel pipe, steel pipe is after Medium frequency induction coil heats, pump box produces compressed air by powder from powder case in spray, spray outer powder case and deliver to spray gun ejection, aciculiform electroplax on shower nozzle produces corona discharge, make the powder flowed through with negative electrical charge, under the double action of electrostatic field and carrier gas, orientation flies to steel pipe internal-surface, become molten condition immediately, again pipeline is sent into baking-curing in curing oven, temperature controls at 225-260 DEG C, Temperature fall, strengthens the adhesive force of powder.Namely plastics coated tube is become.
Comparative experiments:
To produce the polyvinyl chloride spraying pipeline of 12m, use background technology CN101823044A as first group.The present invention is as second group.Adopt an interior spray gun, one group of outer spray coating device advances to other end operating type from one end is the 3rd group.Often organize processing ten, compare and be listed as follows:
| group | average time processed by single pipe | interior spraying effect | trypsin method effect | powder consumption |
| first group | 15min | there is tomography, uneven | thin or the nothing in bottom | 40kg |
| second group | 5min | evenly, spraying place 15cm is repeated in centre | evenly, spraying place 15cm is repeated in centre. | 20kg |
| 3rd group | 10min | because interior spray gun trembles, after 7m, uneven | evenly | 30kg |
To sum up, the inventive method is simple, easy to use, can enhance productivity, avoid spray gun tremble, dusts even and powder using efficiency is high.1, the present invention adopts the mode entered, and to entering life period difference, make often to organize interior spray gun, object for appreciation spray gun all arrives steel pipe 1/2+15cm distance, what namely there is 15cm repeats spraying place, both saved general spray time, seam crossing perfection docking while improve operating efficiency, can have been made again.2, the present invention adopts the mode entered, and namely the interior spray gun of rigidity can be the half length of conventional lance, is painted with example with 12 meters of steel tube inner sprays, spray gun in if the extension tube of 12 meters is fixing, along with motion, the vibration of extension tube end is serious, greatly affects the coating quality in pipe.And adopt entering mode, decrease the distance of extension tube half, namely extension tube 6 meters can realize, and vibration obviously reduces, and in pipe, coating quality is good.3, the present invention reclaims by inhaling plastering roller while spraying outside, connecing being reclaimed by Ji Fenkou in powder groove, greatly reducing the waste situation of powder for dropping into.(excessive powder in pipe is collected well, only blows to opposite side with from side, and is positioned at pipe, there will not be the situation of pollution, and the powder outside pipe becomes easily infected by dust, iron filings etc., so focus on the recycling of managing outer powder.）
Claims (7)
1. a production method for plastics coated tube, is characterized in that, comprises the steps:
A. steel pipe is put in pickling tube, carries out acid pickling and rust removing operation,
B. the steel pipe clear water after pickling is rinsed well and dries, for subsequent use,
C. to the steel pipe heating in medium frequency of step B gained,
D. electrostatic spray is to plastic-coated synchronous inside and outside steel pipe,
E. be heating and curing,
F. Temperature fall.
2. the production method of plastics coated tube according to claim 1, is characterized in that, step D uses electrostatic spraying line to carry out plastic-coated operation, and electrostatic spraying line comprises steel pipe conveyer, outer spray coating device, inner spray coating device and powder recovering device.
3. the production method of plastics coated tube according to claim 2, it is characterized in that, steel pipe conveyer comprises operation track (11), operation track (11) is provided with two travelling cars (9), the bottom of travelling car (9) is provided with road wheel (10), road wheel (10) and operation track (11) match, the top of each travelling car (9) is integrated is provided with slide rail, slide rail on each travelling car (9) slidably connects two motor cabinets (8), the side of motor cabinet (8) is provided with frame plate (2), be fixedly connected with between frame plate (2) with travelling car (9), motor cabinet (8) is fixed with steel pipe rotary electric machine (7) and shaft coupling (1), the output shaft of steel pipe rotary electric machine (7) is fixedly connected with one end of shaft coupling (1), the other end of shaft coupling (1) is provided with power transmission shaft, power transmission shaft is connected with the countershaft of frame plate (2), the middle part of power transmission shaft is fixed with moving runner (2), the integrated groove being provided with L shape in the edge of moving runner, steel pipe rotary electric machine (7) drives moving runner (6) to rotate by shaft coupling (1), groove (3) place erection on moving runner (6) on two travelling cars (9) has steel pipe (4), moving runner (6) makes steel pipe (4) original place rotate, two travelling cars (9) change in the upper distance of operation track (11) with the steel pipe (4) adapting to different length, by bolt, motor cabinet (8) be fixed on slide rail and then regulate the distance of two motor cabinets (8), namely have adjusted the spacing of two moving runners (6) to adapt to the steel pipe (4) of different tube diameters.
4. the production method of plastics coated tube according to claim 3, it is characterized in that, outer spray coating device comprises two work boxs (13) and two groups of work box tracks (19), work box track (19) is positioned at the both sides of operation track (11), the side of each work box (13) is provided with the outer powder case (12) of spray, opposite side is provided with collection box (18), work box (13) is in n shape, one sidewall of work box (13) is fixed with how exclusive spray gun (14), adjacent two exclusive spray guns (14) are intersected with each other, intersecting angle is 30-60 degree, another side shaft of work box (13) is connected with brush axle (16), brush axle (16) top is provided with brush spindle motor, brush spindle motor is positioned at work box (13), the output shaft of brush spindle motor is fixedly connected with brush axle (16), brush axle (16) is socketed with and inhales plastering roller (17), inhaling plastering roller (17) is superfine fibre textile, blower fan and powder falling storehouse is provided with in collection box (18), integrated being provided with of the sidewall of collection box (18) inhales powder mouth, inhale plastering roller (17) and be positioned at the side of inhaling powder mouth, spray in outer powder case (13) and be provided with pump box, pump box drives powder to be ejected on steel pipe (4) outer wall along outer spray gun (14), the lower hook of work box (13) hangs with backplate (15), the bottom of backplate (15) is integrated is provided with half slot, half slot is the top with steel pipe (4), spray outer powder case (12), the bottom of collection box (18) is provided with road wheel and road wheel and work box track (19) match.
5. the production method of plastics coated tube according to claim 4, it is characterized in that, inner spray coating device comprises two interior spray guns walking case (22), interior spray gun (26) and the interior powder case (20) of spray, interior spray gun walking case (22) is positioned at the outside of corresponding travelling car (9), the bottom of interior spray gun walking case (22) is provided with road wheel and road wheel and operation track (11) match, the middle part of interior spray gun walking case (22) is provided with stationary pipes (23), stationary pipes (23) is socketed with extension tube (25), one end end winding support of extension tube (25) has interior spray gun (26), one end of extension tube (25) is connected with powder case (20) in spray by tube connector, the upper and lower both sides of tube wall of stationary pipes (23) are fixed with two groups of adjusting bolts (21), the bottom of interior spray gun walking case (22) is fixed with base plate (24), adjusting bolt (21) and base plate, the top of interior spray gun walking case (22) is threaded, the height of the precession of adjusting bolt (21) or back-out and then adjustment stationary pipes (23) distance base plate (24), namely the height that have adjusted interior spray gun distance ground adapts to the steel pipe of different tube diameters to make interior spray gun (26) and guarantees that interior spray gun (26) is suspended from the circle centre position of this steel pipe, pump box is provided with in powder case (20) in spray, pump box drives powder along extension tube (25), interior spray gun (26) sprays, extension tube (25) is steel part.
6. the production method of plastics coated tube according to claim 5, it is characterized in that, powder recovering device comprises and connects powder groove (5), connecing powder groove (5) is fixed between operation track (11), connecing powder groove (5) is positioned at immediately below steel pipe, work box (13) is across the top connecing powder groove (5), the powder fractions that outer spray gun (14) sprays falls within and connects in powder groove (5), connect the middle part of powder groove (5), two ends are one-body molded is respectively provided with Ji Fenkou (29), the cross section connecing powder groove (5) is semicircle shape, the bottom connecing powder groove (5) is plugged and connected with mozzle (30), multiple mozzle (30) is connected by recovery tube (31), recovery tube (31) is connected with collection box (18), the both sides of the half slot of backplate (15) are integrated is provided with link (28), (28) are hooked with rubber flap to link, rubber flap is semicircle shape, rubber flap is along with two work box motions and then be pushed into by the powder connect in powder groove near Ji Fenkou (29), the suction of the blower fan in collection box (18) will inhale plastering roller (17), the powder connect on powder groove (5) sucks collection box (18) and drops in powder falling storehouse.
7. the production method of plastics coated tube according to claim 6, it is characterized in that, the job step of step D is:
First, according to the spacing of steel pipe length adjustment two travelling cars, and travelling car is fixed on operation track by fixture block; Distance between the motor cabinet regulating each travelling car according to the thickness of steel pipe caliber, adjusting bolt in regulating on spray gun walking case, interior spray gun is made to be positioned at the circle centre position of this kind of steel pipe, steel pipe after heating in medium frequency hangs in the groove place of the moving runner of travelling car by overhead traveling crane, steel pipe rotary electric machine synchronously, in the same way moves, and steel pipe rotates along with the rotation original place of moving runner;
Secondly, two work boxs are made to be positioned at the two ends of steel pipe, interior spray gun is positioned at the two ends of steel pipe, two interior spray gun walking casees are to entering and be 5-10s to the time difference of entering, two work boxs are to entering and be 5-10s to the time difference of entering, the travel distance of two interior spray gun walking casees, work box is all set as the 1/2+15cm of steel pipe length, and namely, interior spray gun walking case, work box move to+15cm place in the middle part of steel pipe, then return; Because to advance life period difference, in one of them after spray gun walking case, work box return, spray gun walking case in another, work box have advanced to 1/2 place close to steel pipe length, seam crossing are repeated spraying.
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| CN107138323A (en) * | 2017-05-27 | 2017-09-08 | 青岛鲁航气囊护舷有限公司 | A kind of spray equipment of the real core SPUA of floating on water surface |
| CN107899835A (en) * | 2017-12-14 | 2018-04-13 | 海盐汇通智能家居股份有限公司 | A kind of steel pipe plastic-blasting device |
| CN108080196A (en) * | 2017-12-30 | 2018-05-29 | 天津昕田管道科技有限公司 | Environment friendly and pollution-free steel pipe is inside and outside to apply coating line |
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| CN115445836A (en) * | 2022-09-27 | 2022-12-09 | 四川兴天元钢桥有限公司 | Intelligent laser rust removal automatic spraying workstation for large-diameter steel pipe and using method thereof |
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