KR101549124B1 - The outer diameter and within the double coating, steel having an epoxy resin coating layer that coats the outer diameter at the same time - Google Patents

The outer diameter and within the double coating, steel having an epoxy resin coating layer that coats the outer diameter at the same time Download PDF

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KR101549124B1
KR101549124B1 KR1020150055944A KR20150055944A KR101549124B1 KR 101549124 B1 KR101549124 B1 KR 101549124B1 KR 1020150055944 A KR1020150055944 A KR 1020150055944A KR 20150055944 A KR20150055944 A KR 20150055944A KR 101549124 B1 KR101549124 B1 KR 101549124B1
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coating
epoxy
steel pipe
layer
coating layer
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KR1020150055944A
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Korean (ko)
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최갑정
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(주) 케이 앤 지 스틸
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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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • 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
    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The present invention relates to a steel pipe having an outer diameter double coating and an epoxy resin coating layer simultaneously coating inner and outer diameters. More particularly, the present invention relates to a steel pipe which simultaneously supplies an epoxy powder and an adhesive resin Coated with an antimicrobial ceramic and an inner diameter epoxy containing jade on the outer diameter and inner diameter of the coated steel pipe, and the antimicrobial substance according to the ceramic mixture, the far infrared ray radiation efficiency of the jade, the deterrent of bacterial growth and the sterilization and antibacterial ability A double coating of an outer diameter and an epoxy resin coating layer for simultaneously coating the inner and outer diameters so as to provide a benefit to be used as antibiotics and to greatly shorten the manufacturing process.
In the present invention, an epoxy coating layer, an adhesive resin layer, and a polyethylene coating layer are formed on an outer surface of a metal tube of a steel pipe rotated by a rotating device while being heated by a heating device in a heating chamber, and an inner diameter epoxy coating layer is formed on the inner surface of the metal layer. The epoxy resin coating layer is prepared by blending 25 to 65 parts by weight of an epoxy resin, 5 to 15 parts by weight of a ceramic mixture to be ground in a size of 200 to 600 mesh, and having a purity of 95 to 99 parts by weight, 10 to 45 parts by weight of a jade powder consisting of 0.5 part by weight and 20 to 50 parts by weight of a ceramic filler,
The steel tube was supplied to an outer diameter first coating apparatus composed of a plurality of epoxy outer diameter coating apparatuses and an adhesive resin coating apparatus installed at regular intervals so as to face each other at an inclined inner wall, and the epoxy powder was supplied from the epoxy outer diameter coating apparatus while being rotated by a rotating device, A coating layer is coated and an adhesive resin is supplied in the adhesive resin coating apparatus to coat the adhesive resin layer,
The steel tube coated with the epoxy coating layer and the adhesive resin layer was supplied to an outer diameter secondary coating and inner diameter coating apparatus composed of a polyethylene resin coating apparatus and an epoxy resin inner diameter coating apparatus installed at regular intervals, A polyethylene resin is supplied to coat the polyethylene coating layer, and at the same time, supplied to a nozzle bundle provided at the tip of the epoxy paint transfer tube in an epoxy paint sprayer on the inner diameter of the steel pipe, then divided into a plurality of nozzle tubes in the nozzle bundle, And an inner epoxy coating layer is coated by supplying an epoxy resin in an epoxy resin inner coating apparatus which is sprayed from an injection nozzle provided at the tip end and coated.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a steel pipe having an outer diameter and an inner circumferential outer coating,

The present invention relates to a steel pipe having an outer diameter double coating and an epoxy resin coating layer simultaneously coating inner and outer diameters. More particularly, the present invention relates to a steel pipe which simultaneously supplies an epoxy powder and an adhesive resin Coated with an antimicrobial ceramic and an inner diameter epoxy containing jade on the outer diameter and inner diameter of the coated steel pipe, and the antimicrobial substance according to the ceramic mixture, the far infrared ray radiation efficiency of the jade, the deterrent of bacterial growth and the sterilization and antibacterial ability A double coating of an outer diameter and an epoxy resin coating layer for simultaneously coating the inner and outer diameters so as to provide a benefit to be used as antibiotics and to greatly shorten the manufacturing process.

In general, pipes are used for various purposes in various kinds of prefabricated structures, and these pipes are mainly made of a metal such as steel. In recent years, pipes having a metal surface treatment, a pipe coated with liquid paint, Coated pipes coated with synthetic resin have been widely used. In particular, the synthetic resin coated pipe can be given its beautiful appearance by processing various colors on its outer diameter according to the color of the synthetic resin to be coated.

These pipes, which are used as water supply and drainage pipes, use mostly steel pipes due to high water pressure. The steel pipe is coated on the inner and outer surfaces to prevent corrosion by the fluid. At this time, a liquid resin or a resin powder is used as a coating material for coating the steel pipe.

In the coating method of the steel pipe using powder, the surface of the steel pipe is pre-treated so that the paint is adhered well, and the steel pipe is preheated to about 200 to 230 ° C by using a heating device. Next, powder coating is sprayed on the preheated steel pipe at a constant thickness. Then, the powder coating is melted by the heat of the steel pipe and hardened to form a coating film.

However, it is difficult to expect effects such as the effect of preventing the corrosion of the coating film from the contact between the liquid phase and the metal material and the effect of maintaining the state of the steel pipe for a long period of time and improving the quality of the liquid phase, It is a reality.

On the other hand, far-infrared energy emitting materials are various. There are various products such as jade, oak charcoal, and elvan. Tourmaline was used in diluted water, and it was about to be made with adhesive-free mixed sheet. However, the far infrared ray energy emissivity of these products was about 40 to 100 탆. The most purity jade tested was about 100 μm.

First, jade has various supernatural and mysterious effects as recorded in Oriental medicine's Dongbok-gog and Bon-gok gangmok. Among these efficacies, far-infrared radiation function, antibacterial activity Function, the function of removing impurities from the object (removal of heavy metals), and the function of changing hard water to soft water.

Jade is divided into nephrite and jadeite. Mineralogically, jadeite is an optical material of monoclinic whitish stone of inosilicate. The quality of nephrite is the structure of its fine structure, It is composed of silica, calcium, iron, magnesium, etc. (SiO2, MgO, Fe2O, CaO, Na2O, H2O) as main constituents. And is known to emit a large amount of far-infrared rays that cause beneficial effects such as antibacterial, fungicidal, deodorizing effect, and water purification function.

Secondly, it is found that far infrared ray radiator far infrared ray emits far infrared rays when containing specific elements among natural minerals, and radiation energy is emitted as the content and purity of the specific elements are higher. Far infrared crystals (chemical composition SiO2, Al2O3) were synthesized by applying these properties to porous crystals with about twice the radiation intensity of natural minerals. By adding the far infrared ray radiation synthesizing far infrared ray radiation synthesizing material to the epoxy coating composition, not only the function of the jade can be maximized, but also the effect of adsorbing the pollution substance which is the main cause of the water pollution due to the porous property can be exerted.

Third, synthetic non-toxic inorganic antimicrobial agent is a non-toxic antimicrobial agent which substitutes antimicrobial metal (Zn, Ag) on (SiO2, Al2O3, Zn, Ag) zeolite carrier (chemical composition: Me2 / n, O, Al2O3, xSiO2, yH2O) Epoxy coatings It can be added to the subject composition to exhibit strong growth inhibition and killing power through contact with various microorganisms, and unlike organic antimicrobial agents, it is stable even at high temperatures and has no volatility or leaching.

Conventional Epoxy Coating Compositions Existing epoxy coating compositions are prepared by dispersing and mixing non-toxic pigments, talc, barium sulfate and additives in the epoxy resin base composition. Typical applications include iron, wood and flooring, and inner coatings of concrete structures and pools . However, since such conventional epoxy coatings do not have functionality such as far-infrared radiation effect, antibacterial action, deodorization, and water purifying action as described above, when coated on the inner surface of an indoor swimming pool, Can not be inhibited from growing, and can not perform deodorization, removal of heavy metals, and purifying action, thereby adversely affecting the human body.

In addition, antimicrobial coating agents, which are widely used in various industrial products, household appliances and sanitary products, are coating methods for thin film formation, and it is difficult to continue the effect for more than 6 months due to limitation of inhibiting propagation of essential bacteria and fungi. Antimicrobial and antibacterial coatings are prepared by adding disinfectants and antiseptics to some paints. However, when these antimicrobial agents are used, they contain harmful components in the human body. It does not last for a long period of time, and its performance can not be maintained relative to an expensive construction cost.

On the other hand, Patent Registration No. 1468093 (registered on Apr. 26, 2014) filed by the applicant of the present invention includes a surface treatment step of removing foreign matters scattered on inner and outer surfaces of a steel pipe by shot blasting; A preheating step of placing the steel pipe processed in the surface treatment step on two rotating rollers provided on a rotating device and heating the steel pipe with a gas torch of a heating device; An outer coating step of sequentially coating an outer diameter epoxy coating layer, an adhesive resin layer and a polyethylene coating layer on an outer surface of the preheated steel pipe in an outer surface coating apparatus; A cooling step of cooling the outer surface coated steel pipe in a cooling device using water or air; An inner surface coating step of coating an inner surface of the cooled steel pipe with an inner surface coating apparatus; The method comprising the steps of:

A ceramic mixture processing step of processing the amphibolite and sphalerite to a size of 200 to 600 meshes, respectively;

A ceramic mixture mixing step of mixing the processed hornblende and sphalerite;

A step of milling jade to be mixed with the ceramic mixture to a size of 200 to 600 mesh and processing the mixture to a purity of 95 to 99 wt% and a water content of 0.03 to 0.5 wt%;

A coating comprising 25 to 70 parts by weight of an epoxy resin, 5 to 15 parts by weight of a ceramic mixture, 10 to 45 parts by weight of an oxalate powder and 20 to 50 parts by weight of a ceramic filler after the surface treatment step, preheating step, outer surface coating step and cooling step Coating an inner surface of the steel pipe with a thickness of 220 to 300 탆 while rotating the steel pipe in a normal direction and coating the steel pipe with a thickness of 440 to 600 탆 by rotating the steel pipe while rotating in the opposite direction And the like.

The conventional technique is to heat the steel pipe while rotating the steel pipe, and then moving the steel pipe to the hopper, coating the outside diameter of the steel pipe with the outer diameter of the steel pipe first, then moving the steel pipe to the next step, A step of coating the adhesive resin layer in a second step and coating the outer surface of the steel pipe with a polyethylene coating layer in a third step while rotating the steel pipe to the next step and cooling the steel pipe and coating the inner surface with an epoxy paint Since the molding process of the steel pipe is very complicated and the hopper for performing each process is continuously installed, there is a lot of difficulty in moving the large-diameter steel pipe having a diameter of 400 mm to 3,000 mm, It takes up a large area for carrying out the coating, so that one The line needs a space of several thousand pyeong and the normal cooling and coating is not performed during the movement of the steel pipe, so that it is difficult to maintain the quality and safety.

[Patent Document 0001]. Patent Registration No. 0361555 (registered on November 06, 2002) [Patent document 0002]. Patent Publication No. 2005-0048557 (disclosed on May 24, 2005) [Patent document 0003] Patent Registration No. 0427682 (registered on Apr. 04, 2004) [Patent Document 0004] Patent Publication No. 2005-0043826 (disclosed on May 11, 2005) [Patent document 0005]. Patent Registration No. 1468093 (registered on November 26, 2014)

Accordingly, the present invention has been made in order to solve such conventional drawbacks, and it is an object of the present invention to provide a method for manufacturing a steel pipe, which is capable of mixing a ceramic mixture to maximize the function of far-infrared radiation, antibacterial function, deodorizing function, And to simultaneously coat the powder and the adhesive resin at the same time.

Another object of the present invention is to provide an epoxy resin coating apparatus and an adhesive resin coating apparatus which are installed at regular intervals and simultaneously coated with an epoxy powder and an adhesive resin on the outer diameter of a primary steel pipe and then coated with a plurality of polyethylene resin coating apparatuses And an epoxy resin is simultaneously coated on the inner diameter of the steel pipe through an epoxy resin inner-diameter coating device composed of a plurality of nozzle pipes by coating the outer diameter of the steel pipe with a polyethylene resin.

The present invention is characterized in that an epoxy coating layer, an adhesive resin layer, and a polyethylene coating layer are formed on an outer surface of a metal pipe of a steel pipe rotated by a rotating device while being heated by a heating device in a heating chamber, and an inner diameter epoxy coating layer is formed on the inner surface of the metal layer; The epoxy resin coating layer is prepared by blending 25 to 65 parts by weight of an epoxy resin, 5 to 15 parts by weight of a ceramic mixture to be ground in a size of 200 to 600 mesh, and having a purity of 95 to 99 parts by weight, 10 to 45 parts by weight of a jade powder consisting of 0.5 part by weight and 20 to 50 parts by weight of a ceramic filler,
The steel tube was supplied to an outer diameter first coating apparatus composed of a plurality of epoxy outer diameter coating apparatuses and an adhesive resin coating apparatus installed at regular intervals so as to face each other at an inclined inner wall, and the epoxy powder was supplied from the epoxy outer diameter coating apparatus while being rotated by a rotating device, A coating layer is coated and an adhesive resin is supplied in the adhesive resin coating apparatus to coat the adhesive resin layer,
The steel tube coated with the epoxy coating layer and the adhesive resin layer was supplied to an outer diameter secondary coating and inner diameter coating apparatus composed of a polyethylene resin coating apparatus and an epoxy resin inner diameter coating apparatus installed at regular intervals, A polyethylene resin is supplied to coat the polyethylene coating layer, and at the same time, supplied to a nozzle bundle provided at the tip of the epoxy paint transfer tube in an epoxy paint sprayer on the inner diameter of the steel pipe, then divided into a plurality of nozzle tubes in the nozzle bundle, And an inner epoxy coating layer is coated by supplying an epoxy resin in an epoxy resin inner coating apparatus which is sprayed from an injection nozzle provided at the tip end and coated.

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The present invention relates to a process for producing a steel pipe which maximizes the function of far-infrared radiation, antibacterial function, deodorization function and water purification by mixing a ceramic mixture, an epoxy powder is coated on the outer diameter of a steel pipe through an epoxy powder outer diameter coating device, It is possible to simultaneously coat the adhesive resin using the adhesive resin coating apparatus installed on one side of the coating apparatus, thereby reducing the work process and time, prompting the work to proceed quickly, and providing the effect of greatly reducing the cost .

The present invention relates to an epoxy resin coating apparatus and an adhesive resin coating apparatus which are installed at regular intervals and simultaneously coat an epoxy powder and an adhesive resin on the outer diameter of a primary steel pipe and then use a plurality of polyethylene resin coating apparatuses It is possible to simultaneously coat epoxy resin on the inside diameter of steel pipe by coating polyethylene resin on outer diameter and epoxy resin inner coating device composed of multiple nozzle pipes, thereby reducing work process and time, It is possible to provide a great saving effect.

1 is a perspective view showing a state in which a steel pipe according to the present invention is rotated and heated;
Fig. 2 is a side view showing a state where the epoxy powder and the adhesive resin are simultaneously coated on the outer diameter of the steel pipe of the present invention
3 is a side view showing a state in which a polyethylene resin is coated on the outer diameter of the steel pipe of the present invention and an inner paint is coated with an epoxy paint
4 is a front view of the installation state of the epoxy powder coating apparatus, the adhesive resin coating apparatus and the polyethylene resin coating apparatus of the present invention
Fig. 5 is a cross-sectional view of the inner surface coating apparatus of the present invention
6 is a schematic view of a steel pipe coating apparatus of the present invention
7 is a sectional view of the dust-collecting apparatus according to the present invention
8 is a block diagram for explaining the steel pipe coating method of the present invention

FIG. 1 is a perspective view showing a state where a steel pipe according to the present invention is rotated and heated, FIG. 2 is a side view showing a state in which an epoxy powder and an adhesive resin are simultaneously coated on an outer diameter of a steel pipe according to the present invention, FIG. 4 is a front view of the installation state of the epoxy powder coating apparatus, the adhesive resin coating apparatus, and the polyethylene resin coating apparatus of the present invention, and FIG. 5 is a front view of the epoxy resin coating apparatus, Fig. 6 is a schematic view of a steel pipe coating apparatus of the present invention. Fig.

A steel pipe having an epoxy resin coating layer for simultaneously coating an inner diameter and an outer diameter of the outer coating according to the present invention is disposed inside a heating chamber 10 configured to be openable and closable and the steel pipe (20) A heating device 40 disposed inside the heating chamber 10 and disposed below the rotating device 30 to heat the steel pipe 20; An outer diameter primary coating device 50 for simultaneously coating the outer diameter epoxy coating layer 22 and the adhesive resin layer 23 on the surface of the steel pipe 20 heated by the heating device 40, A polyethylene coating layer 24 is formed on the outer surface of a steel pipe 20 whose surface is coated with the device 50,

And an outer diameter secondary coating and an inner diameter coating device 60 for coating the inner circumferential epoxy coating layer 25.

The heating chamber 10 is configured to be openable and closable so as to prevent the coating quality from being degraded by soot generated by the heating device 40. When the flame from the flame outlet 40a of the gas torch is incompletely burnt, soot is generated. The soot is attached to the surface of the steel pipe 20, The surface coating material is prevented from being properly coated on the steel pipe so that the surface coating material is peeled later. Therefore, if the side surface of the heating chamber 10 is configured to be openable and closable, the soot can escape to the open space, thereby preventing the coating peeling phenomenon.

The rotating device (30) is constituted by a rotating roller which is installed in close contact with both end surfaces of the steel pipe (20). This rotating roller is connected to a motor M disposed outside the heating chamber 10. [

The heating device 40 includes a plurality of flue gas outlets 40a and a gas torch through which the flame is injected from the flame outlet 40a. The gas torch is installed such that the flame outlet 40a is positioned below the steel pipe that is placed on the rotating roller.

The flame injected from the flame outlet 40a arranged in this way directly contacts the bottom surface of the steel pipe 20 rotated on the upper side of the rotating roller to heat the steel pipe. Therefore, the time required for heating the steel pipe 20 to a temperature suitable for coating can be shortened and the fuel consumption can be reduced, so that the productivity can be improved and the cost can be reduced.

The outer diameter first coating apparatus 50 may be any one of a conventional powder coating method and a coating method used in an extrusion coating method. The outer diameter first coating apparatus 50 may include a plurality of Epoxy powder coating apparatus 220 and adhesive resin coating apparatus 230 are installed in the hopper 100 to simultaneously coat the outer diameter epoxy coating layer 22 and the adhesive resin layer 23 on the outer diameter of the steel pipe 20.

The hopper 100 is formed with an injection space 101 and an inclined inner wall 102 formed on both sides of the hopper 100. The epoxy powder coating apparatus 220 and the adhesive resin coating apparatus 230 have the same constituent elements, 101 at regular intervals so as to face each other at the inclined inner wall 102. [

The plurality of epoxy powder coating apparatuses 220 and the adhesive resin coating apparatus 230 installed at the predetermined intervals are connected to an epoxy resin supply pipe 222 connected to the epoxy powder injector 221 and an adhesive resin supply pipe 232 connected to the adhesive resin injector 231 The nozzle bundles 224 and 234 connected to the nozzle bundle holders 223 and 233 are passed through the nozzle bundle holders 223 and 233 to be fixed by the fixing bolts 223a and 233a, And is fixed to the inclined inner wall 102 by the connection bolts 228a and 238a.

A plurality of nozzle tubes 225 and 235 protrude from the nozzle bundles 224 and 234 and protrude upward from the nozzles 227 and 237 and are ejected from the nozzles 226 and 236 at the tip, .

The plurality of epoxy powder coating devices 220 and the adhesive resin coating device 230 installed at the predetermined intervals are formed by first spraying an epoxy powder to form an outer diameter epoxy coating layer 22 and spraying an adhesive resin to form an adhesive resin layer 23, So that simultaneous coating is performed in one hopper 100.

The hopper 100 is provided with a rotating device 30 to rotate the steel pipe 20 at a constant speed so that the epoxy powder coated in the epoxy powder coating device 220 and the adhesive resin coating device 230, To be uniformly coated.

The outer diameter secondary coating and the inner diameter coating apparatus 60 are arranged such that a polyethylene coating layer (not shown) is formed on the outer diameter of the steel pipe 20 in the injection space 101 of the hopper 100 installed to rotate the steel pipe 20 through the rotating device 30 24 and an epoxy resin inner coating apparatus 70 for coating an inner diameter epoxy coating layer 25 on the inner diameter of the steel pipe 20. [

The plurality of polyethylene resin coating apparatuses 240 installed at the predetermined intervals pass through the polyethylene supply pipe 242 connected to the polyethylene resin injector 241 and the nozzle bundle 244 through the nozzle bundle holder 243 to be fixed to the fixing bolt 243a And the connecting rod 248 is fixed to the inclined inner wall 102 with the connecting bolt 248a at the nozzle bundle fixing base 243. [

In the nozzle bundle 244, a plurality of nozzle tubes 245 are protruded to penetrate through the nozzle mount 247 and protrude upward, and are sprayed from the nozzle 246 at the tip to coat the nozzle bundle 245.

The plurality of polyethylene resin coating apparatuses 240 installed at the predetermined intervals inject the polyethylene resin to the outer diameter of the steel pipe 20 to form the polyethylene coating layer 24 and spray the epoxy resin from the inner diameter of the steel pipe 20, Coating the resin layer 25 so as to simultaneously coat both the inner diameter and the outer diameter.

A rotating device 30 is installed inside the hopper 100 to rotate the steel pipe 20 at a constant speed so that the polyethylene resin coating device 240 and the polyethylene resin sprayed from the epoxy resin inner diameter coating device 70 and the epoxy Thereby uniformly coating the resin.

The epoxy resin inner diameter coating apparatus 70 includes an epoxy sprayer 71 in which an epoxy resin is stored and an epoxy sprayer 71 having one end connected to the epoxy injector 71 and the other end drawn into the inner surface of the steel pipe 20, A plurality of guide pipes 72 and an epoxy paint transfer pipe 73 for guiding the molten metal to the inner side of the epoxy paint transfer pipe 73 and a nozzle bundle 74 connected to the other end of the epoxy paint transfer pipe 73, And an injection nozzle 76 for separating and passing through the nozzle mounting base 77 and spraying the tip of the nozzle to the inner diameter of the epoxy steel pipe 20.

The epoxy sprayer 72 is installed on the lower side so as to be movable so that the epoxy paint transfer pipe 73 can be moved in and out of the steel pipe 20.

7 is a sectional view of the dust collecting apparatus according to the present invention. The hopper 100 is provided with a plurality of epoxy outer diameter coating devices 220 and adhesive resin coating devices 230, A dust collecting apparatus 300 for collecting the remaining polyethylene terephthalate resin coating apparatus 240 on the lower side of the inclined inner wall 102 through a collecting pipe 310 by forming a discharge port 105 on the lower side of the inclined inner wall 102, And the dust collecting apparatus 300 connected to the polyethylene resin coating apparatus 240 collects and recycles the polyethylene resin.

A method of coating a steel pipe according to the present invention comprises: a step (S10) of processing a ceramic mixture to be processed, each of which comprises a hornblende and a sphalerite;

(S20) mixing the processed hornblende and sphalite to produce a ceramic mixture;

(S30) of processing the jade to be mixed with the ceramic mixture for coating;

A surface treatment step (S40) of removing impurities scattered on the inner and outer surfaces of the steel pipe (20) by shot blasting after processing the ceramic mixture and jade;

The preheating step S50 (in which the steel pipe 20 treated in the surface treatment step S40 is placed on the two rotating rollers 30 according to the present invention and heated by the gas torch of the heating device 40 according to the present invention, )Wow;

An outer diameter first coating step (S60) of simultaneously coating an outer diameter epoxy coating layer (22) and an adhesive resin layer (23) on the outer surface of the preheated steel pipe (20) in the outer diameter primary coating apparatus (50);

And an inner diameter coating step (S80) in which the outer diameter coated steel pipe (20) is simultaneously coated with an outer diameter secondary coating and an inner diameter coating device (60) at outer and inner diameters.

The ceramic mixture processing step (S10) and the ceramic mixture mixing step (S20) for processing the amphibolite and sphalite are ground to a size of 200 to 600mesh and 5 to 15 parts by weight of the total weight of the coating material;

50 to 90 parts by weight of biotite and 10 to 50 parts by weight of sphalerite are mixed and mixed with a ceramic mixture.

The step of machining (S30) for machining jade to be mixed with the machined ceramic mixture is carried out in a size of 200 to 600 mesh and is composed of 95 to 99 parts by weight of purity and 0.03 to 0.5 parts by weight of water, By weight.

The jade has an emissivity (5 to 20 탆) of 0.93 radiant energy (W / ㎡, 탆, 40 캜) of 3.74 횞 102, a hardness of 5 to 5.5 and a chemical composition of SiO2, Fe2O3, CaO, MgO, K2O, and Na2O, and is used within a range of 10 to 45 parts by weight of the total weight of the paint. When less than 10 parts by weight is used, the effect required by the present invention is insignificant. When more than 45 parts by weight, There is a problem that the pulverization and dispersion can not be performed due to the decrease and viscosity increase.

The surface treatment step S40 is a step of removing rust or oil components and foreign substances from the inner and outer surfaces of the steel pipe 20 by shot blasting so as to prevent peeling of the coating material to be coated later, 5: 5 ratio, and performing 15 to 20 revolutions per minute.

The preheating step S50 is a step of raising the steel pipe 20 by a desired temperature so that the epoxy, the adhesive, and the polyethylene are firmly coated on the surface-treated steel pipe 20 by the surface temperature.

In order to perform such a process, the gas torch according to the present invention is used, and the flame coming from the flame outlet 40a of the gas torch is directly contacted to the surface of the steel pipe.

The outer diameter first coating step S60 is a step of coating the outer diameter epoxy coating layer 22 on the surface of the steel pipe 20 and coating the adhesive resin layer 23 on the outer diameter epoxy coating layer 22.

The epoxy powder coating apparatus 220 for coating the outer diameter epoxy coating layer 22 in the outer diameter first coating step S60 is supplied to the epoxy supply pipe 222 from the epoxy powder injector 221 and supplied to the nozzle bundle 224 4, the nozzle bundle 224 is dispersed by a plurality of nozzle tubes 225 and then supplied to the nozzle mounting base 227 through a spray nozzle 226, The epoxy powder is uniformly coated on the outer diameter of the rotating steel pipe 20 through the rotating device 30 to mold the outer diameter epoxy coating layer 22. [

The adhesive resin coating apparatus 230 for forming the outer diameter epoxy coating layer 22 and coating the adhesive resin layer 23 without transferring the steel pipe 20 to another process is mounted on the adhesive resin sprayer 231, And then supplied to the nozzle bundle 234 after being supplied to the nozzle bundle 234. The nozzle bundle 234 is dispersed and supplied to the nozzle bundle 234 by a plurality of nozzle tubes 235 as shown in FIG. The adhesive resin is uniformly coated on the outer diameter of the outer diameter epoxy coating layer 22 of the steel pipe 20 rotating through the rotary device 30 so as to uniformly coat the adhesive agent Thereby forming the resin layer 23.

The epoxy powder outer coating device 220 and the adhesive resin coaching device 230 are fixed to the inclined wall 102 through the connecting rods 228 and 238 and the connecting bolts 228a and 238a, The positions of the spray nozzles 226 and 236 can be selected by adjusting the position and the interval and sprayed in the spray space 101 to prevent spraying to the outside so that only the steel pipe 20 is spray coated.

The outer diameter epoxy coating layer 22 is coated to a thickness of 80 to 120 탆, the adhesive resin layer 23 is coated to a thickness of 120 to 200 탆, and the polyethylene coating layer 24 is coated to a thickness of 200 to 250 탆 , 40 to 50 rotations per minute.

The outer diameter secondary coating and the inner diameter coating step S70 are the same as those of the polyethylene resin coating apparatus 240 for coating the polyethylene coating layer 24 on the outer side of the outer diameter secondary coating and the inner resin coating apparatus 60 in which the adhesive resin layer 23 is formed Is supplied from the polyethylene resin injector 241 to the polyethylene resin supply pipe 242 and is supplied to the nozzle bundle 244 and then dispersed in the nozzle bundle 244 by a plurality of nozzle pipes 245 as shown in FIG. The epoxy powder is sprayed to the nozzle mounting base 247 through the injection nozzle 246 at a predetermined interval to a predetermined width. Therefore, the polyethylene coating layer 24 is formed on the outer diameter of the steel pipe 20, which rotates through the rotating device 30, (24).

The polyethylene resin coating apparatus 240 is fixed to the inclined wall 102 through the connecting rod 248 and the connecting bolt 248a so that the desired position and interval of the outer diameter of the steel pipe 20 are adjusted to adjust the position of the injection nozzle 246 So that it is prevented from being sprayed to the outside, so that coating by spraying is performed only on the steel pipe 20.

The polyethylene coating layer 24 is formed through the polyethylene resin coating apparatus 240 and the inner diameter epoxy coating layer 25 is formed on the inner diameter of the steel pipe 20 through the epoxy resin inner diameter coating apparatus 70,

The epoxy resin inner diameter coating apparatus 70 is configured such that when the epoxy transfer pipe 73 connected to the epoxy paint sprayer 71 is drawn into the steel pipe 20, the rotating roller disposed under the steel pipe 20 is rotated forward The steel pipe 20 disposed on the upper side of the roller is rotated in the normal direction and when the epoxy transfer pipe 73 is drawn out of the steel pipe 20, the rotating roller disposed on the lower side of the steel pipe 20 is reversely rotated, The steel pipe 20 disposed on the upper side of the steel pipe 20 is reversely rotated.

The epoxy paint transfer pipe 73 is connected to the inner diameter of the guide pipe 72 and is positioned so that the tip of the epoxy paint transfer pipe 73 is bent and supplied to the nozzle bundle 74, 74 are installed at the nozzle mount 77 separated from the nozzle tubes 75 at the lower side of the inner tube 74. The injection nozzle 76 is installed at the tip of the nozzle tube 77 so that the inner diameter of the steel tube 20, Coating the coating layer 25.

Therefore, even when the weld bead 20a is formed inside the steel pipe 20, it is possible to uniformly coat the periphery of the weld bead 20a as shown in Fig.

The coating material is prepared by mixing 25 to 70 parts by weight of an epoxy resin, 200 to 600 mesh, and 5 to 15 parts by weight of the total weight of the coating material. The mixture is ground to a size of 200 to 600 mesh, 10 to 45 parts by weight of a jade powder having a water content of 0.03 to 0.5 parts by weight, and 20 to 50 parts by weight of a ceramic filler.

The inner-diameter epoxy coating layer 25 for coating the paint on the inner diameter of the steel pipe 20 is coated on the steel pipe 20 so as to have a thickness of 220 to 300 탆 at one time, It is preferable to coat the substrate to a thickness of 440 to 600 mu m.

Although the thickness for coating the inner-diameter epoxy coating layer 25 has been described in detail above, it is possible to control the thickness through the control of the rpm, the control of the conveying speed and the coating number through the ceramic mixture comprising jade, amphibolite and sphalerite , Thereby greatly improving hygiene and long-term durability as compared with conventional products.

An epoxy outer diameter coating device 220 and an adhesive resin coating device 230 are installed on both sides of the hopper 100 or a polyethylene resin coating device 240 is installed on the inner surface of the hopper 100, The dust collecting device 300 moves from the dust collecting container 102 to the dust collecting device 300 through the dust collecting pipe 320 through the discharge port 105 to prevent contamination of the workplace and to recycle the dust if necessary.

In the present invention as described above, the epoxy outer coating apparatus 220 and the adhesive resin coating apparatus 230, which are made up of the outer diameter first coating apparatus 50, are installed in one hopper 100, The coating of the continuous epoxy coating layer 22 and the adhesive resin layer 23 is performed so that the two separate steps can be performed in one place,

A polyethylene resin coating apparatus 240 composed of an outer diameter secondary coating and an inner diameter coating apparatus 60 and an epoxy resin inner diameter coating apparatus 70 are installed in one hopper 100 to rotate the steel pipe 20 and simultaneously form a polyethylene coating layer 24 and the inner-diameter epoxy coating layer 25, so that the hopper 100 separated in four stages as a whole can be reduced to two stages without being continuously installed By performing the coating operation, the work area is reduced in size, thereby providing a remarkable invention for reducing unnecessary production space.

In the present invention, the epoxy coating layer and the adhesive coating layer are simultaneously coated on the outer diameter of the steel pipe in one hopper, and then the polyethylene coating layer and the inner diameter epoxy coating layer are simultaneously coated on the outer diameter of the steel pipe to control the far infrared ray radiation efficiency, And antimicrobial ability, and it is possible to provide a very useful invention that can efficiently perform the work by greatly reducing the work process.

10: heating chamber 20: steel pipe
21: metal layer 22: epoxy coating layer
23: Adhesive resin layer 24: Polyethylene coating layer
25: inner diameter epoxy coating layer 30: rotating device
40: Heating device 50: Outer diameter primary coating device
60: outer diameter secondary coating and inner diameter coating apparatus 70: epoxy resin inner diameter coating apparatus
72: Guide tube 73: Epoxy paint transfer tube
74, 224, 234, 244: nozzle bundle 75, 225, 235, 345:
76, 226, 236, 246: jet nozzles 77, 227, 237, 247: nozzle mount
100: hopper 101: injection space
102: sloped inner wall 105: outlet
220: Epoxy outer coating device 221: Epoxy powder sprayer
222: epoxy supply pipe 223, 233, 243: nozzle bundle holder
228, 238, 248: connecting rod 230: adhesive resin coating device
231: Adhesive resin injector 232: Adhesive resin supply pipe
240: Polyethylene resin coating device 241: Polyethylene resin powder
242: Polyethylene supply pipe 300: Dust collector
310: dust collector 320: dust collecting tube

Claims (5)

An epoxy coating layer 22, an adhesive resin layer 23 and a polyethylene coating layer 24 are formed on the outer surface of the metal layer 21 of the steel pipe 20 rotated by the rotating device 30 while being heated by the heating device 40 in the heating chamber 10 , And an inner diameter epoxy coating layer (25) on the inner surface of the metal layer (21); The epoxy resin coating layer 25 is prepared by mixing 25 to 65 parts by weight of an epoxy resin, 5 to 15 parts by weight of a ceramic mixture to be ground in a size of 200 to 600 mesh, and pulverized to a size of 200 to 600 mesh, 10 to 45 parts by weight of a jade powder having a content of 0.03 to 0.5 parts by weight and 20 to 50 parts by weight of a ceramic filler,
The steel pipe 20 is supplied to an outer diameter primary coating apparatus 50 composed of a plurality of epoxy outer diameter coating apparatuses 220 and an adhesive resin coating apparatus 230 installed at regular intervals so as to face each other at the inclined inner wall 102, The epoxy resin coating is applied to the epoxy resin coating device 22 and the adhesive resin layer 23 is coated on the adhesive resin coating device 230 In addition,
The steel pipe 20 coated with the epoxy coating layer 22 and the adhesive resin layer 23 is coated with an outer diameter secondary coating and an inner diameter coating made of a polyethylene resin coating device 240 and an epoxy resin inner diameter coating device 70, The polyethylene resin is supplied from the polyethylene resin coating apparatus 240 to the polyethylene coating layer 24 while being rotated by the rotating device 30 while supplying the coating solution to the apparatus 60. The polyethylene paint layer 24 is coated on the inner surface of the steel pipe 20 with an epoxy paint sprayer 71 is supplied to a nozzle bundle 74 provided at the tip of the epoxy paint transfer tube 73 and then divided into a plurality of nozzle tubes 45 in the nozzle bundle 74 to be supplied to the tip of the nozzle tube 45 And an inner diameter epoxy coating layer (25) is coated by supplying an epoxy resin from an epoxy resin inner diameter coating device (70) sprayed from the installed injection nozzle (46) A steel pipe having an epoxy resin coating layer.
The method according to claim 1,
The epoxy coating layer 22 of the steel pipe 20 is coated with an epoxy powder of an epoxy outer coating device 220 having a plurality of openings facing the adhesive resin coating device 230 on the inclined inner wall 102 of the injection space 101 at regular intervals Is supplied to the nozzle bundle 224 from the injector 221 and then divided into a plurality of nozzle tubes 225 by the nozzle bundle 224 and is injected from an injection nozzle 226 provided at the tip of the nozzle tube 225 (23) and an epoxy resin coating layer coating both the inner and outer diameters at the same time.
The method according to claim 1,
The epoxy resin coating layer 22 is coated on the adhesive resin layer 23 of the steel pipe 20 and the epoxy powder coating device 220 (or 220) is coated on the inclined inner wall 102 of the injection space 101 at a predetermined interval in one hopper 100 And the nozzle bundle 234 is divided into a plurality of nozzle tubes 235 in the nozzle bundle 234 so as to be divided into a plurality of nozzles 235. The nozzle bundles 234 are divided into a plurality of nozzles 235 by the adhesive resin injector 231 of the adhesive resin coating apparatus 230, (236) provided at the tip of the pipe (235), and coating the same with an outer diameter double coating and an epoxy resin coating layer simultaneously coating inner and outer diameters.
The method according to claim 1,
The polyethylene coating layer 24 of the steel pipe 20 is injected into the nozzle bundle 244 from the polyethylene resin injector 241 of the polyethylene resin coating apparatus 240 installed at one side of the inclined inner wall 102 of the injection space 101 at regular intervals Is divided into a plurality of nozzle tubes (245) by the nozzle bundle (244) to be sprayed and sprayed from an injection nozzle (246) provided at the tip of the nozzle tube (245) And a steel pipe having an epoxy resin coating layer for simultaneously coating inner and outer diameters. delete
KR1020150055944A 2015-04-21 2015-04-21 The outer diameter and within the double coating, steel having an epoxy resin coating layer that coats the outer diameter at the same time KR101549124B1 (en)

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KR101724419B1 (en) 2016-10-17 2017-04-10 (주) 케이 앤 지 스틸 Within the steel pipe coating apparatus having a polypropylene coating layer for improving adhesion improving outside diameter and illuminance
KR101737418B1 (en) * 2016-10-17 2017-05-18 주식회사 우리스틸 Common duct pipe and its manufacturing method using a steel having an epoxy resin layer is
KR101737413B1 (en) * 2016-10-17 2017-05-19 주식회사 우리스틸 Common duct pipe with steel pipe with epoxy resin
KR101737410B1 (en) * 2016-10-17 2017-05-19 주식회사 우리스틸 Common duct pipe with steel pipe with epoxy resin
KR101737411B1 (en) * 2016-10-17 2017-05-19 주식회사 우리스틸 Common duct pipe with downcomer with epoxy resin
KR101737408B1 (en) 2016-10-17 2017-05-19 주식회사 우리스틸 Within the steel pipe having a polypropylene coating layer for improving adhesion improving outside diameter and illuminance
KR101737415B1 (en) * 2016-10-17 2017-05-19 주식회사 우리스틸 Common duct pipe and its manufacturing method using a steel having an epoxy resin layer is
KR101737407B1 (en) 2016-10-17 2017-05-29 주식회사 우리스틸 Within the steel pipe having a polypropylene coating layer for improving adhesion improving outside diameter and illuminance
KR101737409B1 (en) 2016-10-17 2017-05-29 주식회사 우리스틸 Within the steel pipe having a polypropylene coating layer for improving adhesion improving outside diameter and illuminance
CN109210282A (en) * 2018-10-23 2019-01-15 山东禹王管业有限公司 A kind of heavy caliber anti-corrosive steel tube and manufacture craft
CN112295880A (en) * 2020-11-06 2021-02-02 常州市盛诺管业有限公司 Machining process of precision seamless steel tube for gas spring

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KR101724419B1 (en) 2016-10-17 2017-04-10 (주) 케이 앤 지 스틸 Within the steel pipe coating apparatus having a polypropylene coating layer for improving adhesion improving outside diameter and illuminance
KR101737418B1 (en) * 2016-10-17 2017-05-18 주식회사 우리스틸 Common duct pipe and its manufacturing method using a steel having an epoxy resin layer is
KR101737413B1 (en) * 2016-10-17 2017-05-19 주식회사 우리스틸 Common duct pipe with steel pipe with epoxy resin
KR101737410B1 (en) * 2016-10-17 2017-05-19 주식회사 우리스틸 Common duct pipe with steel pipe with epoxy resin
KR101737411B1 (en) * 2016-10-17 2017-05-19 주식회사 우리스틸 Common duct pipe with downcomer with epoxy resin
KR101737408B1 (en) 2016-10-17 2017-05-19 주식회사 우리스틸 Within the steel pipe having a polypropylene coating layer for improving adhesion improving outside diameter and illuminance
KR101737415B1 (en) * 2016-10-17 2017-05-19 주식회사 우리스틸 Common duct pipe and its manufacturing method using a steel having an epoxy resin layer is
KR101737407B1 (en) 2016-10-17 2017-05-29 주식회사 우리스틸 Within the steel pipe having a polypropylene coating layer for improving adhesion improving outside diameter and illuminance
KR101737409B1 (en) 2016-10-17 2017-05-29 주식회사 우리스틸 Within the steel pipe having a polypropylene coating layer for improving adhesion improving outside diameter and illuminance
CN109210282A (en) * 2018-10-23 2019-01-15 山东禹王管业有限公司 A kind of heavy caliber anti-corrosive steel tube and manufacture craft
CN112295880A (en) * 2020-11-06 2021-02-02 常州市盛诺管业有限公司 Machining process of precision seamless steel tube for gas spring
CN112295880B (en) * 2020-11-06 2022-02-01 常州市盛诺管业有限公司 Machining process of precision seamless steel tube for gas spring

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