CN101823044A - Integration method of steel tube inner wall and outer wall powder spraying, curing and film-forming and device thereof - Google Patents

Integration method of steel tube inner wall and outer wall powder spraying, curing and film-forming and device thereof Download PDF

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Publication number
CN101823044A
CN101823044A CN200910010609A CN200910010609A CN101823044A CN 101823044 A CN101823044 A CN 101823044A CN 200910010609 A CN200910010609 A CN 200910010609A CN 200910010609 A CN200910010609 A CN 200910010609A CN 101823044 A CN101823044 A CN 101823044A
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CN
China
Prior art keywords
steel pipe
spraying
heating
steel tube
railcar
Prior art date
Application number
CN200910010609A
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Chinese (zh)
Inventor
李志诚
李婉婷
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李志诚
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Application filed by 李志诚 filed Critical 李志诚
Priority to CN200910010609A priority Critical patent/CN101823044A/en
Publication of CN101823044A publication Critical patent/CN101823044A/en

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Abstract

The invention discloses an integration method of steel tube inner wall and outer wall powder spraying, curing and film-forming and a device thereof. In the method, mobile spraying and heating equipment is used to simultaneously carry out powder spraying, heating and curing, and a traction device is adopted to carry out heating and spraying with uniform speed under a set temperature on a steel tube. The integrated device comprises electrostatic spraying equipment, an air pump, a section of rail, a rail car integrating heating and spraying and a rail car and internal spray gun traction device. The steel tube is erected in the middle of the rail along the rail direction, the rail car spans the steel tube, an internal spray gun is arranged in the steel tube, a rail car and internal spray gun bracket is connected to the traction device through a steel wire rope, an electromagnetic induction power box is arranged at the upper part of the rail car, an electromagnetic heating cylinder and an external spray gun are fixed in the rail car, the air pump is connected to the electrostatic spraying equipment through a ventilating duct, and the electrostatic spraying equipment is connected to the rail car and the internal spray gun through powder transport hoses. The device has compact and reasonable structure, adopts a method of ultrasonic frequency electromagnetic mobile heating, synchronously sprays the inner wall and the outer wall of the steel tube, has the advantages of high processing product quality, field processing as well as steel tube weld bore and raw material process treatment, simplifies the pretreatment process, enhances the heat efficiency and lowers the cost.

Description

Incorporate method of steel pipe inside and outside wall powder spraying, curing film forming and device thereof

One, technical field

The present invention relates to a kind of powder spray coating device, particularly be exclusively used in the spraying method and the device thereof of the epoxy powder of steel pipe.

Two, background technology

The operation of Powder Electrostatic Coating Technology flow process is as follows at present:

Pre-treatment → electrostatic powder coating → powder heating cure (plasticizing) film forming → finished product

Pre-treatment: mainly be degreasing, rust cleaning, its method is identical with the preliminary treatment that is coated with liquid lacquer.This is the first step of operation, also is first zone that works alone (pre-treatment district) of workshop, and part is finished in the pre-treatment pond.

Electrostatic powder coating: at high-pressure electrostatic after the match, podwer gun is connect negative pole, workpiece grounding (positive pole) constitutes the loop, and powder promptly has negative electrical charge by compressed air by the spray gun ejection, sprays on the workpiece by principle of opposite sex attraction and solidifies.This is second step of operation, also is second zone that works alone (powder spraying district) of workshop, if the steel pipe spraying inside and outside, it is to do interior spraying earlier in proper order, and then does outer spraying, generally is to finish in the electrostatic powder coating case.

Powder heating cure (plasticizing) film forming: the workpiece after the spraying, send into 180~200 ℃ the interior heating of drying room, make powder curing.This is the 3rd step of operation, also is the 3rd zone that works alone (powder curing district) of workshop, heats in drying room (case) and finishes.

Finished product: coating is taken off the protection thing, the equating burr after solidifying.Check the workpiece coating, to having of being detected leak spray, pin hole, damage, the workpiece of defective such as bubble, reprocess or respray.

Existing Electrostatic Spray Technology (especially pipe coating) has the following disadvantages:

1, the pre-treatment to steel pipe requires standard very high, and steel pipe is finished pretreatment procedure through degreasing, pickling, washing, phosphatization, drying, if pre-treatment is not in place, often causes cured film to leak defectives such as spray, pin hole, local hollow out, bubble;

2, be divided into each zone by function in the workshop, floor space is big, and each inter process steel pipe moves the cured film quality influence very big, and the vibrations dry linting is the most formidable problem;

The drying room (case) of 3, powder heating cure (plasticizing) film forming, bulky (long 15M * wide 4M * high 2M) adopts the heating of fuel Heating or common electrical usually, and the thermal efficiency is low, and heat loss is serious;

4, be subjected to the pre-treatment pond, particularly solidify the bulky factor affecting of drying room (case), whole process must be carried out in the workshop factory building that advance planning is built well, can not move to the pipeline engineering scene, implement on-the-spot processing, steel pipe cost of transportation height, cured film carrying destroy probability big, influence the pipeline engineering progress;

5, the steel pipe temperature is low in the powder spraying process causes that the powder adhesive rate is low, the defective of thin film thickness can't overcome;

6, after the pipeline welding, the epoxy resin corrosion prevention film with technology can't be done in the steel pipe welding position, can only do easy preservative treatment with solvent type substitute products, greatly reduces the anticorrosion grade of whole pipe.

Three, summary of the invention

The purpose of this invention is to provide a kind of can the raising and spray film-forming converted products quality and production efficiency, and low to steel pipe pre-treatment standard-required, can on-the-spot incorporate method of steel pipe inside and outside wall powder spraying, curing film forming and the device thereof that moves, processes on the spot.

The technical solution used in the present invention is: steel pipe inside and outside wall powder spraying, curing film forming integral method is to use portable spraying and warming-up device, and powder spraying and heating cure thereof are carried out simultaneously; Adopt draw-gear, make the gentleness that adds of steel pipe be sprayed under the design temperature and at the uniform velocity carry out, powder smelting, levelling, curing disposable are finished by the temperature of steel pipe.

Adopt same pulling equipment, the inside and outside wall spraying of steel pipe is carried out simultaneously.

Steel pipe inside and outside wall powder spraying, curing film forming integrated apparatus comprises electrostatic spraying device and air pump, also comprises the draw-gear of track section, heating and the integrated railcar of spraying and railcar and interior spray gun.The suitable orbital direction frame of steel pipe to be sprayed is in the middle of track, railcar is on steel pipe, interior spray gun places steel pipe, railcar and interior gun stand are connected on the draw-gear by steel wire rope, the electromagnetic induction power supply box is arranged at railcar top, be fixed with electromagnetism cartridge heater and outer spray gun in railcar, air pump is connected on the electrostatic spraying apparatus through ventilation shaft, and electrostatic spraying apparatus is connected on railcar and the interior spray gun by the powder delivery hose.

Steel pipe is placed on the support of integrated apparatus, superaudio heating and the integrated railcar of outer spraying, through the pulling equipment traction, the end that travels at the uniform speed of the end along track from steel pipe.In the running, electromagnetism heating part in the integrated railcar produces 20KHZ~40KHZ superaudio electromagnetic wave by the cylindrical shape electromagnetic induction coil of pressing close to steel tube surface, make the steel pipe partial of its covering produce eddy-current heating, the steel pipe temperature reaches 200 ℃ of the upper limits of epoxy powder solidification temperature (160~200 ℃), follow in the car thereafter outer electrostatic powder coating gun and the steel duct electrostatic powder coating gun of sync pulling, evenly spray the epoxy powder of static electrification simultaneously at the inside and outside wall of steel pipe, powder is evenly attached to steel tube surface, powder melts on the steel pipe of 200 ℃ of temperature, levelling, film-forming, form firm epoxy resin heavy anticorrosive film, through natural cooling, the fished pipe after filming is removed production line.

Steel pipe inside and outside wall powder spraying, curing film forming integrated apparatus, compact conformation is reasonable, and adopted superaudio tubular solenoid to move the method for heating steel pipe, gone up the inside and outside synchronous electrostatic powder spraying of tube wall of enforcement, had following beneficial effect at hot steel pipe (200 ℃):

1, simplifies the preceding pre-treatment process of pipe coating: owing to adopt the direct spraying coating process of hot steel pipe, steel pipe does not have surface scum just can spray film-forming processing, pre-treatment only needs simple decontamination, the processing of removing slag, simplified the pre-treatment process greatly, steel pipe can omit the pre-treatment process under the normal condition;

2, spraying film-forming converted products quality height: heat afterwards earlier spray, hot spraying while operation, avoided traditional handicraft to move the dry linting defective that vibrations bring fully, directly carry out the epoxy powder electrostatic spraying on the hot steel pipe of solidification temperature reaching, powder rate height, even, the adhesion-tight of film-forming, improved the product quality of epoxy resin anti-corrosive steel tube greatly;

3, the integrated apparatus conveniently moving scene of can implementing processes on the spot: integrated apparatus can arbitrarily move, implement on-the-spot processing, its volume is little, in light weight, and (wherein, the superaudio heating also is not more than 1.5M with the general frame volume of the integrated orbital motion car of outer spraying 3), each mechanism's easy installation and removal is moved flexibly, possesses electric load (20 kilowatts), simple and easy place (greater than 20 * 5=100M 2), just can satisfy processing requirement on the spot, make the scene be processed into possibility;

4, realized that steel pipe pipeline weld bond handles with the raw material processes: traditional handicraft can't be carried out with the in-situ processing of raw material technology weld bond, and it is alternative generally to adopt solvent epoxy varnish to do, and greatly reduces the anticorrosion grade of whole pipeline.This integrated apparatus project organization compactness, each several part is relatively independent, electromagnetism heating power supply and tubular heater coil are applied independently in the heating of steel pipe pipeline welded junction part, spraying electrostatic powder then solidifies, just can finish the epoxy anticorrosion film of the same raw material technology of pipe welding port, solve and solidify the technical barrier that case can not be applied to the pipe welding port scene in the prior art;

5, increase substantially the thermal efficiency: superaudio makes steel pipe produce the electromagnetism mode of heating of eddy-current heating, it is the highest mode of heating of the present thermal efficiency, synchronous in addition inside and outside electrostatic powder spraying, increased substantially the thermal efficiency of epoxy resin corrosion prevention film processing, inside and outside when spraying film forming simultaneously the total power consumption of device be 0.4KW.H/M2, separately in or during outer wall spraying film forming the total power consumption of device be 0.8KW.H/M 2

6, reduce cost: with the existing market calculation of price, in the prior art, with actuat daily capacity 200M 2The epoxy resin film workshop is an example, and a whole set of production equipment needs 80~1,000,000 yuan, the light-duty factory building 800~1200M of standard 2, 15 of processing personnel, computing equipment input, depreciation, factory building cost, raw material use, heat energy, loss, artificial etc., production cost adds up to 40 yuan/M 2About; Adopt integrated apparatus of the present invention, same actuat daily capacity, a whole set of production equipment needs 80,000 yuan, ordinary plant 100~200M 2(also place processing) in the open, 5 of processing personnel, computing equipment input, depreciation, factory building (place) cost, raw material use, heat energy, loss, artificial etc., production cost adds up to 13 yuan/M 2About; Cost reduces significantly.

Four, description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of railcar of the present invention;

Fig. 3 is the side view of Fig. 2;

Fig. 4 is the structural representation of electromagnetism cartridge heater of the present invention;

Fig. 5 is the side view of Fig. 4;

Fig. 6 is the structural representation of interior shower nozzle and support thereof;

Fig. 7 is the side view of Fig. 6.

Five, the specific embodiment

Steel pipe inside and outside wall powder spraying, curing film forming integrated apparatus comprises track 1, places the support 2 of steel pipe 3 to be sprayed, railcar 4 and electrostatic spraying device 7 and air pump 8.Steel pipe support 2 is two, and by the cuboid framework that the 60mm angle steel is welded, center of top becomes the M type to be welded on side by side on the framework with the long angle steel of two sections 5mm, is used for placing steel tubes, plays fixedly steel pipe, prevents the effect that steel pipe moves.During use, with reference to the length of integrated vehicle track running track and steel pipe to be sprayed, the position of putting two steel pipe supports 2 makes steel pipe to be sprayed 3 occupy the center of track; Steel pipe to be sprayed is diameter 100~800mm, and wall thickness is less than seamless steel pipe, ERW and the spiral welded pipe of 12mm; The accurate cube frame that heating and the integrated railcar 4 of outer spraying are welded by the 20mm angle steel, top is the electromagnetism heating power supply case 5 of cuboid sealing, the bottom is open, and electromagnetism cartridge heater 11 and two symmetrical outer paint spray guns 16 are installed; Four inside groove pulleys that orbit are installed for four jiaos in the bottom.The electromagnetism power supply of electromagnetism heating power supply case 5 is 2kw superaudio power supply independently, totally 10, is connected with electromagnetic induction coil 18 on being fixed on electromagnetism cartridge heater 11 by lead 13.

Electromagnetism cartridge heater 11 is the shapes according to steel pipe 3 outer walls, with 18 typings of 2kw electromagnetic induction coil, the two sides is with anti-500 ℃ insulating thin then, be fixed into cylindric, be connected below the electromagnetism heating power supply case 5 by adjusting fixed support 12, the spacing on electromagnetic induction coil 18 and steel pipe 3 surfaces makes steel pipe 3 local produce electromagnetic eddies by the electromagnetic effect of superaudio less than 10mm during work, makes steel pipe heating itself.

Electrostatic powder coating gun is the part of electrostatic spraying standard device, and 16 two of outer spray guns are connected on the inwall of railcar 4 both sides by fixed support 17 symmetries, are used for the outer surface of steel tube electrostatic powder spraying; 15 1 of interior spray guns at the steel pipe central part, are used for the electrostatic powder spraying of steel pipe internal-surface by 14 of travel(l)ing rests.

Epoxy powder delivery hose 6 is parts of electrostatic spraying standard device, is used for carrying to spray gun the band air pressure epoxy powder of full cure.

Draw-gear 10 is made up of the conventional components such as steel wire traction rope of buncher (250w), sheave, 2mm; Spray gun 15, integrated railcar 4 sync pullings in being used for, rotating speed can be regulated, and the adjustable range of the speed of service is 0.5~2 meter/minute, according to the concrete parameter (thickness, wall thickness etc.) of steel pipe and the thermal efficiency situation of electromagnetism heating, determines at the uniform velocity hauling speed.

Track 1 is to lay with the 20mm angle steel to be formed by connecting, for integrated railcar 4 operations.

Electrostatic spraying device 7 is conventional spraying equipment, comprising: HV generator (1~90kv), air path part (pressure 5~7bar), defeated powder part.

Air pump 8 is the standard air pump, and specific targets are: pressure 8bar: output tolerance 0.5 cubic meters per minute.For electrostatic powder spraying equipment provides gases at high pressure.

ERW with length 9m, diameter 105mm, thickness 4mm is an example below, describes the overall operation process of a lower device:

Set-up procedure: with track complete, support is put and is put in place, move that car gets on the right track, steel pipe upper bracket, traction case connect and put in place; The tubular heater coil adopts four drum combinations, enables heater, and the operation car moves to the other end from steel pipe one end, determines the hauling speed when the steel pipe temperature reaches 200 ℃, and fixes its rotating speed; The powder outlet quantity of adjusting spraying inside and outside arrives and is fit to scale, and fixing; Preparation is ready.

The device course of normal operation: steel pipe is put on the shelf, the operation car, interior paint spray gun is ready at the initiating terminal of steel pipe, pulling equipment is ready, open the firing equipment heating earlier, when hand-held infrared radiation thermometer tested steel tube head temperature reaches 200 ℃, open the operation car simultaneously, the pulling equipment of interior paint spray gun and spraying equipment, the operation car, interior paint spray gun moves to the other end from steel pipe one end, speed operation with 1.1 meters/minute, the thickness of powder film forming is 0.3mm, treat that whole pipe coating finishes, the heating of shutoff device, traction, spraying equipment, steel pipe is implemented the water smoke cooling,, repeat this process and process next root steel pipe cooled fished pipe undercarriage warehouse-in.

Claims (5)

1. the incorporate method of steel pipe inside and outside wall powder spraying, curing film forming is characterized in that: use portable spraying and warming-up device, powder spraying and heating cure thereof are carried out simultaneously; Adopt draw-gear, make the gentleness that adds of steel pipe be sprayed under the design temperature and at the uniform velocity carry out, powder smelting, levelling, curing disposable are finished by the temperature of steel pipe.
2. steel pipe inside and outside wall powder spraying, curing film forming integral method according to claim 1 is characterized in that: adopt same draw-gear, the inside and outside wall spraying of steel pipe is carried out simultaneously.
3. steel pipe inside and outside wall powder spraying, curing film forming integrated apparatus, comprise electrostatic spraying device (7) and air pump (8), it is characterized in that: further comprising track section (1), heating and the draw-gear (10) that sprays integrated railcar (4) and railcar (4) and interior spray gun (15), steel pipe (3) is middle at track (1) along the orbital direction frame, railcar (4) is on steel pipe (3), interior spray gun (15) places steel pipe (3), railcar (4) and interior gun stand (14) are connected on the draw-gear (10) by steel wire rope, electromagnetic induction power supply box (5) is arranged at railcar (4) top, in railcar (4), be fixed with electromagnetism cartridge heater (11) and outside spray gun (16), air pump (8) is connected on the electrostatic spraying apparatus (7) through ventilation shaft, and electrostatic spraying apparatus (7) is connected on railcar (4) and the interior spray gun (15) by powder delivery hose (6).
4. steel pipe inside and outside wall powder spraying, curing film forming integrated apparatus according to claim 3, it is characterized in that: heating is the accurate cube frame that is welded by angle steel with the outer integrated railcar of spraying (4), top is the electromagnetism heating power supply case (5) of cuboid sealing, the bottom is open, two outer paint spray guns (16) of electromagnetism cartridge heater (11) and symmetry are installed, four inside groove pulleys of going up operation at track (1) are installed for four jiaos in the bottom, the electromagnetism power supply of electromagnetism heating power supply case (5) is 2kw superaudio power supply independently, is connected with electromagnetic induction coil (18) on being fixed on electromagnetism cartridge heater (11) by lead (13).
5. steel pipe inside and outside wall powder spraying, curing film forming integrated apparatus according to claim 3, it is characterized in that: electromagnetism cartridge heater (11) is the shape according to steel pipe (3) outer wall, 2kw electromagnetic induction coil (18) is finalized the design, the two sides is with anti-500 ℃ insulating thin then, be fixed into cylindric, be connected below the electromagnetism heating power supply case (5) by adjusting fixed support (12), the spacing on electromagnetic induction coil (18) and steel pipe (3) surface is less than 10mm.
CN200910010609A 2009-03-06 2009-03-06 Integration method of steel tube inner wall and outer wall powder spraying, curing and film-forming and device thereof CN101823044A (en)

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Application Number Priority Date Filing Date Title
CN200910010609A CN101823044A (en) 2009-03-06 2009-03-06 Integration method of steel tube inner wall and outer wall powder spraying, curing and film-forming and device thereof

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102626682A (en) * 2012-04-23 2012-08-08 中国石油大学(华东) Anticorrosive paint spray coating equipment of fine rods
CN103350059A (en) * 2013-08-01 2013-10-16 南通亨特管业有限公司 Manufacturing method of steel pipe
CN104043564A (en) * 2013-03-12 2014-09-17 天源环保有限公司 Pipeline coating equipment
CN104148226A (en) * 2014-07-15 2014-11-19 上海同玺电子科技有限公司 3D (three-dimensional) spray painting robot device
CN104785403A (en) * 2015-04-14 2015-07-22 浙江海洋学院 Automatic paint spraying production line
CN105935649A (en) * 2016-06-30 2016-09-14 苏州市永通不锈钢有限公司 Film-coating device for inner wall of steel pipe
CN106153723A (en) * 2016-07-28 2016-11-23 耐世特凌云驱动系统(芜湖)有限公司 The ultrasonic detection device of axostylus axostyle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102626682A (en) * 2012-04-23 2012-08-08 中国石油大学(华东) Anticorrosive paint spray coating equipment of fine rods
CN104043564A (en) * 2013-03-12 2014-09-17 天源环保有限公司 Pipeline coating equipment
CN103350059A (en) * 2013-08-01 2013-10-16 南通亨特管业有限公司 Manufacturing method of steel pipe
CN104148226A (en) * 2014-07-15 2014-11-19 上海同玺电子科技有限公司 3D (three-dimensional) spray painting robot device
CN104785403A (en) * 2015-04-14 2015-07-22 浙江海洋学院 Automatic paint spraying production line
CN105935649A (en) * 2016-06-30 2016-09-14 苏州市永通不锈钢有限公司 Film-coating device for inner wall of steel pipe
CN106153723A (en) * 2016-07-28 2016-11-23 耐世特凌云驱动系统(芜湖)有限公司 The ultrasonic detection device of axostylus axostyle

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Application publication date: 20100908