CN105396769A - Manufacturing method of epoxy resin pipeline - Google Patents
Manufacturing method of epoxy resin pipeline Download PDFInfo
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- CN105396769A CN105396769A CN201510694404.XA CN201510694404A CN105396769A CN 105396769 A CN105396769 A CN 105396769A CN 201510694404 A CN201510694404 A CN 201510694404A CN 105396769 A CN105396769 A CN 105396769A
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- steel pipe
- powder
- spray gun
- case
- interior
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000003822 epoxy resin Substances 0.000 title claims abstract description 21
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 130
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 129
- 239000010959 steel Substances 0.000 claims abstract description 129
- 238000005507 spraying Methods 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 27
- 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
- 238000011084 recovery Methods 0.000 claims abstract description 10
- 239000002253 acid Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 165
- 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
- 239000004033 plastic Substances 0.000 claims description 10
- 229920003023 plastic Polymers 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 239000004753 textile Substances 0.000 claims description 3
- 239000006223 plastic coating Substances 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 12
- 230000007423 decrease Effects 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 206010044565 Tremor Diseases 0.000 description 4
- 230000008901 benefit Effects 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
- 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
- 238000010276 construction Methods 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
- 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
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 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
- 238000012546 transfer Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2254/00—Tubes
- B05D2254/04—Applying the material on the interior of the tube
- B05D2254/06—Applying the material on the interior and exterior of the tube
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a manufacturing method of an epoxy resin pipeline. The manufacturing method of the epoxy resin pipeline comprises the following steps that A, a steel pipe is put into a pickling tank to be subjected to acid pickling and rust removal; B, the steel pipe subjected to acid pickling is washed through clear water and dried for later use; C, intermediate-frequency heating is conducted on the steel pipe obtained in the step B; D, epoxy resin powder is sprayed to the interior and the exterior of the steel pipe synchronously through an electrostatic spraying method; E, heating and curing are conducted; and F, natural cooling is conducted, plastic coating work is conducted through an electrostatic spraying line in the step D, the electrostatic spraying line comprises a steel pipe conveying device, an outer spraying, an inner spraying device and a powder recovery device, and an extension pipe which is arranged on the inner spraying device and used for being connected with an inner spraying gun is of a hydraulic-driven telescopic structure. The manufacturing method of the epoxy resin pipeline is simple; using is convenient, the occupied area of a production line can be reduced, production efficiency is improved, vibration of the spraying gun can be avoided, powder spraying is even, 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 manufacture method of epoxy resin pipeline.
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, production line floor space can be reduced, enhance productivity, avoid spray gun to tremble, manufacture method that is even and a kind of epoxy resin pipeline 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, production line floor space can be reduced, enhance productivity, avoid spray gun to tremble, manufacture method that is even and a kind of epoxy resin pipeline that powder using efficiency is high of dusting.
To achieve these goals, the invention provides a kind of manufacture method of epoxy resin pipeline, 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 spray epoxy powder 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, and on inner spray coating device is hydraulically powered stretching structure for connecting the extension tube of interior spray gun.
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, discharge tube, interior spray gun and the interior powder case of spray, interior spray gun walking case is positioned at the outside of corresponding travelling car, 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, the front end of stationary pipes is fixed with extension tube, extension tube is hydraulically powered stretching structure, extension tube is more piece, the bottom of interior spray gun walking case is fixed with base plate, base plate is fixed with hydraulic pump, be connected by hydraulic oil pipe between hydraulic pump with extension tube, the end winding support often saving extension tube has suspender, the integrated holddown groove being provided with arcuation in the top of suspender, the inwall of suspender is embedded with some balls, the end winding support of a joint extension tube foremost has fixed bar, the wall of fixed bar is embedded with the wide bar magnet of 2-5cm, the end winding support of fixed bar has interior spray gun, interior spray gun plugs together with discharge tube and is connected, the bottom of one joint extension tube of least significant end is fixedly connected with coil pipe case, sidewall and the interior spray gun of coil pipe case are walked between case and are fixedly connected with, the middle part of coil pipe case is provided with spool, the external stability of coil pipe case has coil motor, the output shaft of coil motor is fixedly connected with spool, coil motor drives spool to rotate and then realizes the folding and unfolding of discharge tube, discharge tube is connected through often saving the suspender in extension tube and plugging together with the middle part of stationary pipes after reel wound, in spray, powder case is plugged together by tube connector and is connected to stationary pipes, the upper and lower both sides of tube wall of stationary pipes are fixed with two groups of adjusting bolts, the walk top of case of adjusting bolt and base plate, interior spray gun 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, be provided with pump box in powder case in spray, pump box drives powder along stationary pipes, the ejection of interior spray gun.
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, and two interior spray gun walking casees are to entering and be 5-10s to the time difference of entering, and 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, in extension tube traveling process, launch more piece gradually, end bar magnet and steel pipe inner wall attract each other, lower the vibration of fixed bar, in ensureing, spray gun is stable; 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, powder adopts epoxy powder, 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 epoxy resin pipe 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 reduce production line floor space, 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, coating quality good (current interior spray gun is serious more than 6m vibration, spraying operation weak effect in the pipe after 6-7m) in pipe.
Meanwhile, in extension tube traveling process, launch more piece gradually, end bar magnet and steel pipe inner wall attract each other, and lower the vibration of fixed bar, and in ensureing, spray gun is stable.Therefore extension tube overall length can be increased to 9-10m, namely spray gun, can the steel pipe of disposable spray finishing extreme length 20m to entering in two groups, and the quality of spraying in ensureing.
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.）
4, because extension rod have employed stretching structure, though namely operation track is greatly short, decreases the length of operation track, decrease floor space, make factory building utilization rate high, especially during site operation erection production line, construction cost reduces 12-15%.
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 structural representation of suspender of the present invention.
Fig. 7 is the cross-sectional schematic at fixed bar place of the present invention.
Fig. 8 is the schematic top plan view connecing powder groove of the present invention.
Fig. 9 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. 9, 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 structural representation of suspender of the present invention.Fig. 7 is the cross-sectional schematic at fixed bar place of the present invention.Fig. 8 is the schematic top plan view connecing powder groove of the present invention.Fig. 9 is the view connecing the recovery powder of powder groove of the present invention.
The manufacture method of a kind of epoxy resin pipeline 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 spray epoxy powder 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, and on inner spray coating device is hydraulically powered stretching structure for connecting the extension tube 25 of interior spray gun 26.
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, discharge tube 34, 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
The front end of stationary pipes 23 is fixed with extension tube 25, extension tube 25 is hydraulically powered stretching structure, extension tube 25 is more piece, the bottom of interior spray gun walking case 22 is fixed with base plate 24, base plate 24 is fixed with hydraulic pump, be connected by hydraulic oil pipe between hydraulic pump with extension tube 25, the end winding support often saving extension tube 25 has suspender 35, the integrated holddown groove 39 being provided with arcuation in the top of suspender 35, the inwall of suspender 35 is embedded with some balls 38, the end winding support of a joint extension tube 25 foremost has fixed bar 36, the wall of fixed bar 36 is embedded with the wide bar magnet of 2-5cm 37, the end winding support of fixed bar 36 has interior spray gun 26, interior spray gun 26 plugs together with discharge tube 34 and is connected, the bottom of one joint extension tube 25 of least significant end is fixedly connected with coil pipe case 32, sidewall and the interior spray gun of coil pipe case 32 are walked between case 22 and are fixedly connected with, the middle part of coil pipe case 32 is provided with spool 33, the external stability of coil pipe case 32 has coil motor, the output shaft of coil motor is fixedly connected with spool 33, coil motor drives spool to rotate and then realizes the folding and unfolding of discharge tube 34, discharge tube 34 is through the suspender 35 often saved in extension tube 25 and plug together with the middle part of stationary pipes 23 after spool 33 reels and be connected, in spray, powder case 20 is plugged together by tube connector and is connected to stationary pipes 23, the upper and lower both sides of tube wall of stationary pipes 23 are fixed with two groups of adjusting bolts 21, the walk top of case 22 of adjusting bolt 21 and base plate, interior spray gun 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 have adjusted the height on interior spray gun distance ground to make interior spray gun 2) adapt to the steel pipe of different tube diameters and guarantee that interior spray gun 26 is suspended from the circle centre position of this steel pipe, be provided with pump box in powder case 20 in spray, pump box drives powder to spray along stationary pipes 23, interior spray gun 26.
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
In extension tube traveling process, launch more piece gradually, end bar magnet and steel pipe inner wall attract each other, and lower the vibration of fixed bar, and in ensureing, spray gun is stable; 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, powder adopts epoxy powder, 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 epoxy resin pipe 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:
To sum up, advantage of the present invention is: method is simple, easy to use, can reduce production line floor space, 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, coating quality good (current interior spray gun is serious more than 6m vibration, spraying operation weak effect in the pipe after 6-7m) in pipe.
Meanwhile, in extension tube traveling process, launch more piece gradually, end bar magnet and steel pipe inner wall attract each other, and lower the vibration of fixed bar, and in ensureing, spray gun is stable.Therefore extension tube overall length can be increased to 9-10m, namely spray gun, can the steel pipe of disposable spray finishing extreme length 20m to entering in two groups, and the quality of spraying in ensureing.
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.）
4, because extension rod have employed stretching structure, though namely operation track is greatly short, decreases the length of operation track, decrease floor space, make factory building utilization rate high, especially during site operation erection production line, construction cost reduces 12-15%.
Claims (6)
1. a manufacture method for epoxy resin pipeline, 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 spray epoxy powder 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, electrostatic spraying line comprises steel pipe conveyer, outer spray coating device, inner spray coating device and powder recovering device, on inner spray coating device is hydraulically powered stretching structure for connecting the extension tube (25) of interior spray gun (26).
2. the manufacture method of epoxy resin pipeline according to claim 1, 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.
3. the manufacture method of epoxy resin pipeline according to claim 2, 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.
4. the manufacture method of epoxy resin pipeline according to claim 3, it is characterized in that, inner spray coating device comprises two interior spray guns walking case (22), discharge tube (34), 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), the front end of stationary pipes (23) is fixed with extension tube (25), extension tube (25) is hydraulically powered stretching structure, extension tube (25) is more piece, the bottom of interior spray gun walking case (22) is fixed with base plate (24), (24) are fixed with hydraulic pump to base plate, be connected by hydraulic oil pipe between hydraulic pump with extension tube (25), the end winding support often saving extension tube (25) has suspender (35), the integrated holddown groove (39) being provided with arcuation in the top of suspender (35), the inwall of suspender (35) is embedded with some balls (38), the end winding support of joint extension tube (25) foremost has fixed bar (36), the wall of fixed bar (36) is embedded with the wide bar magnet of 2-5cm (37), the end winding support of fixed bar (36) has interior spray gun (26), interior spray gun (26) plugs together with discharge tube (36) and is connected, the bottom of one joint extension tube (25) of least significant end is fixedly connected with coil pipe case (32), sidewall and the interior spray gun of coil pipe case (32) are walked between case (22) and are fixedly connected with, the middle part of coil pipe case (32) is provided with spool (33), the external stability of coil pipe case (32) has coil motor, the output shaft of coil motor is fixedly connected with spool (33), coil motor drives spool to rotate and then realizes the folding and unfolding of discharge tube (34), discharge tube (34) is through the suspender (35) often saved in extension tube (25) and plug together with the middle part of stationary pipes (23) after spool (33) winding and be connected, in spray, powder case (20) is plugged together by tube connector and is connected to stationary pipes (23), the upper and lower both sides of tube wall of stationary pipes (23) are fixed with two groups of adjusting bolts (21), 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 stationary pipes (23), interior spray gun (26) sprays.
5. the manufacture method of epoxy resin pipeline according to claim 4, 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.
6. the manufacture method of epoxy resin pipeline according to claim 5, 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, and two interior spray gun walking casees are to entering and be 5-10s to the time difference of entering, and 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, in extension tube traveling process, launch more piece gradually, end bar magnet and steel pipe inner wall attract each other, lower the vibration of fixed bar, in ensureing, spray gun is stable; 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107774479A (en) * | 2017-11-24 | 2018-03-09 | 湖北航聚科技有限公司 | A kind of outer thermal protective coating automatic spraying equipment and its spraying method |
| CN108716574A (en) * | 2018-06-19 | 2018-10-30 | 广汉华气防腐工程有限公司 | A kind of high durable anti-corrosion pipe production technology |
| CN109675738A (en) * | 2018-12-27 | 2019-04-26 | 江苏变色龙微粉技术有限公司 | Uniform powder spray equipment and its working method and powder coating production line |
| CN109746144A (en) * | 2019-01-17 | 2019-05-14 | 袁福德 | A kind of steel pipe inside and outside wall automatic spraying machine |
| CN112495721A (en) * | 2020-12-02 | 2021-03-16 | 河北国盛管道装备制造有限公司 | Long distance pipeline internal and external anti-corrosion spraying processing equipment |
| CN113522608A (en) * | 2021-07-08 | 2021-10-22 | 湖南天卓管业有限公司 | Intelligent epoxy powder anti-corrosion spiral steel pipe production equipment |
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| US20090226601A1 (en) * | 2001-07-02 | 2009-09-10 | Boston Scientific Scimed, Inc. | Coating dispensing system and method using a solenoid head for coating medical devices |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107774479A (en) * | 2017-11-24 | 2018-03-09 | 湖北航聚科技有限公司 | A kind of outer thermal protective coating automatic spraying equipment and its spraying method |
| CN108716574A (en) * | 2018-06-19 | 2018-10-30 | 广汉华气防腐工程有限公司 | A kind of high durable anti-corrosion pipe production technology |
| CN108716574B (en) * | 2018-06-19 | 2020-05-19 | 广汉华气防腐工程有限公司 | Production process of high-weather-resistance anticorrosive pipe |
| CN109675738A (en) * | 2018-12-27 | 2019-04-26 | 江苏变色龙微粉技术有限公司 | Uniform powder spray equipment and its working method and powder coating production line |
| CN109675738B (en) * | 2018-12-27 | 2023-05-12 | 江苏变色龙微粉技术有限公司 | Uniform powder spraying device, working method thereof and powder spraying production line |
| CN109746144A (en) * | 2019-01-17 | 2019-05-14 | 袁福德 | A kind of steel pipe inside and outside wall automatic spraying machine |
| CN109746144B (en) * | 2019-01-17 | 2020-12-01 | 浙江金汇休闲制品有限公司 | Automatic spraying machine for inner and outer walls of steel pipe |
| CN112495721A (en) * | 2020-12-02 | 2021-03-16 | 河北国盛管道装备制造有限公司 | Long distance pipeline internal and external anti-corrosion spraying processing equipment |
| CN113522608A (en) * | 2021-07-08 | 2021-10-22 | 湖南天卓管业有限公司 | Intelligent epoxy powder anti-corrosion spiral steel pipe production equipment |
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Denomination of invention: A manufacturing method of epoxy resin pipeline Effective date of registration: 20220527 Granted publication date: 20180302 Pledgee: China Minsheng Banking Corp Qingdao branch Pledgor: Qingdao Haode Boer Industrial Co.,Ltd. Registration number: Y2022370010078 |
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Denomination of invention: A manufacturing method for epoxy resin pipelines Granted publication date: 20180302 Pledgee: China Minsheng Banking Corp Qingdao branch Pledgor: Qingdao Haode Boer Industrial Co.,Ltd. Registration number: Y2024370010069 |
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