KR101554883B1 - Of the outer diameter in the double coating and, at the same time the outer diameter of the steel tube manufacturing apparatus having the epoxy resin coating layer that coats - Google Patents

Of the outer diameter in the double coating and, at the same time the outer diameter of the steel tube manufacturing apparatus having the epoxy resin coating layer that coats Download PDF

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Publication number
KR101554883B1
KR101554883B1 KR1020150055945A KR20150055945A KR101554883B1 KR 101554883 B1 KR101554883 B1 KR 101554883B1 KR 1020150055945 A KR1020150055945 A KR 1020150055945A KR 20150055945 A KR20150055945 A KR 20150055945A KR 101554883 B1 KR101554883 B1 KR 101554883B1
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South Korea
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epoxy
coating
resin
layer
coating layer
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KR1020150055945A
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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
    • 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
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/24—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means incorporating means for heating the liquid or other fluent material, e.g. electrically
    • 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
    • B05B13/0278—Arrangement or mounting of spray heads
    • 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
    • B05B13/06—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 specially designed for treating the inside of hollow bodies
    • B05B13/0645—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 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation
    • 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
    • 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
    • B05D7/24—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

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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)
  • Laminated Bodies (AREA)

Abstract

The present invention relates to an apparatus for manufacturing 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 an apparatus for manufacturing a steel pipe, And the inner diameter of the steel tube coated with the adhesive resin was coated with an antibacterial ceramic and an inner diameter epoxy containing jade to control the far infrared ray radiation efficiency of the antibacterial substance and the jade by the ceramic mixture, The present invention relates to an apparatus for manufacturing a steel pipe having an outer diameter double coating and an epoxy resin coating layer for simultaneously coating inner and outer diameters so as to provide a benefit of using as an antibiotic material while greatly shortening the manufacturing process.
The present invention is characterized in that an epoxy coating layer 22, an adhesive resin layer 23 and an epoxy resin layer 23 are formed on the outer surface of a metal layer 21 of a steel pipe 20 which is heated by a heating device 40 in a heating chamber 10 and rotated by a rotating device 30, And an inner diameter epoxy coating layer (25) on the inner surface of the metal layer (21), wherein the inner surface of the metal layer (21)
The heated steel pipe 20 is supplied from the heating device 40 and is rotated by the rotary device 30 while being supplied to the nozzle bundle 224 through the epoxy supply pipe 222 in the epoxy powder injector 221, An epoxy outer coating apparatus 220 for supplying an epoxy powder from the spray nozzle 226 at the tip of the pipe 225 to coat the epoxy coating 22 and an adhesive resin sprayer 231 for spraying the resin through the adhesive resin supply pipe 232, The adhesive resin coating apparatus 230 for supplying the adhesive resin to the adhesive resin layer 23 by supplying the adhesive resin at the injection nozzles 236 at the tip ends of the plurality of nozzle tubes 235 after being supplied to the bundle 234, An outer diameter primary coating apparatus 50 installed in the injection space 101;
The steel pipe 20 coated with the epoxy coating layer 22 and the adhesive resin layer 23 is supplied and rotated by the rotary device 30 while the polyethylene resin injector 241 feeds the nozzle bundle 244 through the polyethylene resin supply pipe 242 A polyethylene resin coating apparatus 240 for supplying a polyethylene resin from the injection nozzle 246 at the tip end of the plurality of nozzle tubes 245 to coat the polyethylene coating layer 24, Epoxy is supplied to the nozzle bundle 74 through the resin transfer pipe 73 and then supplied from the injection nozzles 76 at the tip of the nozzle tubes 75 so that the inner diameter epoxy coating layer 25 is supplied simultaneously with the polyethylene coating layer 24. [ And an inner diameter coating device 60 for providing an inner diameter coating device 70 for coating an epoxy resin.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a steel pipe having an outer diameter double coating and an epoxy resin coating layer coating both inner and outer diameters at the same time, layer that coats}

The present invention relates to an apparatus for manufacturing 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 an apparatus for manufacturing a steel pipe, And the inner diameter of the steel tube coated with the adhesive resin was coated with an antibacterial ceramic and an inner diameter epoxy containing jade to control the far infrared ray radiation efficiency of the antibacterial substance and the jade by the ceramic mixture, The present invention relates to an apparatus for manufacturing a steel pipe having an outer diameter double coating and an epoxy resin coating layer for simultaneously coating inner and outer diameters so as to provide a benefit of using as an antibiotic material while greatly shortening 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 the powder, the surface of the steel pipe is pre-treated so that the resin adheres well, and the steel pipe is preheated to about 200 to 230 ° C by using a heating device. Next, the powdered resin is sprayed to the preheated steel pipe at a constant thickness. Then, the powdery resin 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 material to the epoxy resin composition, it is possible not only to maximize the function of the jade, but also to exert an excellent effect on the adsorption action of the pollution substance which is the main cause of the water pollution due to the porous property.

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) It is able to exhibit strong growth inhibition ability and killing ability through contact with various kinds of microbes by addition to the epoxy resin base composition, and unlike an organic antimicrobial agent, it is stable at a high temperature and has no volatility and no leaching.

Conventional Epoxy Resin Composition Existing epoxy resin composition is prepared by dispersing and mixing non-toxic pigment, talc, barium sulfate and additives in the epoxy resin base composition. Typical applications are iron, wood and bottom surface, inner structure of concrete structure and pool . However, since the conventional epoxy resin is a resin which does not have functionalities such as far-infrared radiation effect, antibacterial effect, 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 a coating method for forming a thin film, and it is difficult to continue the effect for more than 6 months due to limitation of inhibiting the propagation of essential bacteria and fungi. Antimicrobial and anti-bacterial resins are manufactured by adding disinfectants and antiseptics to some resins. 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 resin coating the 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%;

After the surface treatment step, the preheating step, the outer surface coating step and the cooling step, a resin consisting of 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 a jade powder, and 20 to 50 parts by weight of a ceramic- 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 order and coating a polyethylene coating layer on the outer diameter of the steel pipe in a third step while rotating the steel pipe to the next step and cooling the steel pipe and coating the inner diameter with an epoxy resin 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 relates to an apparatus for manufacturing a steel pipe comprising an epoxy coating layer, an adhesive resin layer and a polyethylene coating layer on the 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 on the inner surface of the metal layer ,

The heated steel pipe is supplied to the nozzle bundle through the epoxy supply pipe in the epoxy powder injector while rotating the rotary pipe by the rotary device, and the epoxy powder is supplied from the injection nozzle at the tip of the plurality of nozzle pipes to coat the epoxy coating layer. A coating apparatus, and an adhesive resin sprayer, an adhesive resin coating apparatus for supplying an adhesive resin to an adhesive resin layer at an injection nozzle at the tip of a plurality of nozzle tubes after being supplied to a nozzle bundle through an adhesive resin supply pipe is installed in the injection space of the hopper An outer diameter primary coating device;

The steel tube coated with the epoxy coating layer and the adhesive resin layer was supplied and rotated by a rotating device while being fed to a nozzle bundle through a polyethylene resin feed pipe in a polyethylene resin injector and then supplied with polyethylene resin from a spray nozzle at the tip of a number of nozzle tubes, And an epoxy resin coating apparatus for spraying an epoxy resin into the nozzle bundle through an epoxy resin transfer tube and supplying epoxy from an injection nozzle at the tip of a plurality of nozzle tubes to simultaneously coat the inner coat epoxy coating layer with the polyethylene coating layer, And an outer diameter primary coating and an inner diameter coating apparatus for providing a resin inner diameter coating apparatus.

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 diameter is coated with an epoxy resin
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
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 resin transfer pipe 73 for guiding the molten metal to the inside of the epoxy resin transfer pipe 73 and a plurality of nozzle pipes 75 from the nozzle bundle 74 connected to the other end of the epoxy resin 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 injector 72 is installed on the lower side so that the epoxy resin injector 72 can move to the inside and outside 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 curl are each milled to a size of 200 to 600 mesh and 5 to 15 parts by weight of the total weight of the resin;

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 resin. When the amount is less than 10 parts by weight, the effect of the function 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,

In the epoxy resin inner diameter coating device 70, when the epoxy resin transfer pipe 73 connected to the epoxy resin injector 71 is drawn into the inside of the steel pipe 20, the rotating roller disposed below the steel pipe 20 is rotated forward The steel pipe 20 disposed on the upper side of the rotating roller is rotated in the normal direction and when the epoxy resin transfer pipe 73 is drawn out of the steel pipe 20, the rotating roller disposed below the steel pipe 20 is rotated in the reverse direction The steel pipe 20 disposed on the upper side of the rotating roller is reversely rotated.

The tip of the epoxy resin transfer tube 73 is bent and supplied to the nozzle bundle 74. The nozzle bundle 74 is connected to the nozzle bundle 74. The epoxy resin transfer tube 73 is connected to the inner diameter of the guide tube 72, 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 in the steel pipe 20, it is possible to uniformly coat the resin around the weld bead 20a as shown in Fig.

The resin is a ceramic mixture comprising 25 to 70 parts by weight of an epoxy resin and having a size of 200 to 600 mesh and 5 to 15 parts by weight of the total weight of the resin and is pulverized into a size of 200 to 600 mesh and has a purity of 95 to 99 parts by weight 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 resin on the inner diameter of the steel pipe 20 is coated while entering the steel pipe 20 in a thickness of 220 to 300 占 퐉 at a time to come out while rotating the steel pipe 20 in the opposite direction, 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 resin 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

Claims (8)

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);
An epoxy outer coating apparatus 220 for coating the epoxy coating layer 22 with epoxy powder supplied from the epoxy powder spraying apparatus 221 while supplying the heated steel pipe 20 from the heating apparatus 40 and rotating the rotated steel pipe 20 with the rotating apparatus 30 And an adhesive resin coating device 230 which is supplied with adhesive resin from the adhesive resin sprayer 231 and coats the adhesive resin layer 23 to the injection space 101 of the hopper 100, (50);
A steel pipe 20 coated with the epoxy coating layer 22 and the adhesive resin layer 23 is supplied and the polyethylene resin is supplied from the polyethylene resin injector 241 while being rotated by the rotating device 30 to coat the polyethylene coating layer 24 And an inner diameter coating apparatus (inner diameter coating apparatus) 70 for installing an epoxy resin inner diameter coating apparatus 70 for supplying an epoxy to the inner diameter epoxy coating layer 25 in the epoxy resin spraying apparatus 71 60) having an epoxy resin coating layer,
The epoxy outer diameter coating device 220 is supplied to the nozzle bundle 224 through the epoxy supply pipe 222 in the epoxy powder injector 221 and then a plurality of nozzle pipes 225 connected to the nozzle bundle 224 are connected to the nozzle mount (227), an epoxy powder is supplied from an injection nozzle (226) at the tip end to coat the epoxy coating layer (22)
The nozzle bundle 224 is fixed to the nozzle bundle fixing base 223 by the fixing bolt 223a and then the connecting base 228 connected to the nozzle bundle fixing base 223 is connected to the inclined inner wall 102 by the connection bolt 228a And an epoxy resin coating layer for simultaneously coating the inner and outer diameters.
delete 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);
An epoxy outer coating apparatus 220 for coating the epoxy coating layer 22 with epoxy powder supplied from the epoxy powder spraying apparatus 221 while supplying the heated steel pipe 20 from the heating apparatus 40 and rotating the rotated steel pipe 20 with the rotating apparatus 30 And an adhesive resin coating device 230 which is supplied with adhesive resin from the adhesive resin sprayer 231 and coats the adhesive resin layer 23 to the injection space 101 of the hopper 100, (50);
A steel pipe 20 coated with the epoxy coating layer 22 and the adhesive resin layer 23 is supplied and the polyethylene resin is supplied from the polyethylene resin injector 241 while being rotated by the rotating device 30 to coat the polyethylene coating layer 24 And an inner diameter coating apparatus (inner diameter coating apparatus) 70 for installing an epoxy resin inner diameter coating apparatus 70 for supplying an epoxy to the inner diameter epoxy coating layer 25 in the epoxy resin spraying apparatus 71 60) having an epoxy resin coating layer,
The adhesive resin coating apparatus 230 is supplied to the nozzle bundle 234 through the adhesive resin spraying apparatus 231 through the adhesive resin supply pipe 232 and a plurality of nozzle tubes 235 connected to the nozzle bundle 234 are connected to the nozzles 234, The adhesive resin is supplied from the spray nozzle 236 at the front end to the adhesive resin layer 23,
The nozzle bundle 234 is fixed to the nozzle bundle holder 233 by the fixing bolt 233a and then the connecting rod 238 connected to the nozzle bundle holder 233 is connected to the inclined inner wall 102 by the connecting bolt 238a And an epoxy resin coating layer for simultaneously coating the inner and outer diameters.
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);
An epoxy outer coating apparatus 220 for coating the epoxy coating layer 22 with epoxy powder supplied from the epoxy powder spraying apparatus 221 while supplying the heated steel pipe 20 from the heating apparatus 40 and rotating the rotated steel pipe 20 with the rotating apparatus 30 And an adhesive resin coating device 230 which is supplied with adhesive resin from the adhesive resin sprayer 231 and coats the adhesive resin layer 23 to the injection space 101 of the hopper 100, (50);
A steel pipe 20 coated with the epoxy coating layer 22 and the adhesive resin layer 23 is supplied and the polyethylene resin is supplied from the polyethylene resin injector 241 while being rotated by the rotating device 30 to coat the polyethylene coating layer 24 And an inner diameter coating apparatus (inner diameter coating apparatus) 70 for installing an epoxy resin inner diameter coating apparatus 70 for supplying an epoxy to the inner diameter epoxy coating layer 25 in the epoxy resin spraying apparatus 71 60) having an epoxy resin coating layer,
The polyethylene resin coating apparatus 240 is supplied to the nozzle bundle 244 through the polyethylene resin supply pipe 242 in the polyethylene resin injector 241 and then a plurality of nozzle pipes 245 connected to the nozzle bundle 244 are connected to the nozzle A polyethylene resin is supplied from the tip of the injection nozzle 246 to the polyethylene coating layer 24,
The nozzle bundle 244 is fixed to the nozzle bundle holder 243 by the fixing bolt 243a and then the connecting rod 248 connected to the nozzle bundle holder 243 is connected to the inclined inner wall 102 by the connecting bolt 248a And an epoxy resin coating layer for simultaneously coating the inner and outer diameters.
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);
An epoxy outer coating apparatus 220 for coating the epoxy coating layer 22 with epoxy powder supplied from the epoxy powder spraying apparatus 221 while supplying the heated steel pipe 20 from the heating apparatus 40 and rotating the rotated steel pipe 20 with the rotating apparatus 30 And an adhesive resin coating device 230 which is supplied with adhesive resin from the adhesive resin sprayer 231 and coats the adhesive resin layer 23 to the injection space 101 of the hopper 100, (50);
A steel pipe 20 coated with the epoxy coating layer 22 and the adhesive resin layer 23 is supplied and the polyethylene resin is supplied from the polyethylene resin injector 241 while being rotated by the rotating device 30 to coat the polyethylene coating layer 24 And an inner diameter coating apparatus (inner diameter coating apparatus) 70 for installing an epoxy resin inner diameter coating apparatus 70 for supplying an epoxy to the inner diameter epoxy coating layer 25 in the epoxy resin spraying apparatus 71 60) having an epoxy resin coating layer,
The epoxy resin inner diameter coating device 70 is supplied to the nozzle bundle 74 through an epoxy resin delivery pipe 73 in an epoxy resin injector 71 and then connected to a plurality of nozzle pipes 75 connected to the nozzle bundle 74, And an inner diameter epoxy coating layer (25) coated with the polyethylene coating layer (24) simultaneously with an epoxy resin being supplied from an injection nozzle (76) at an end supported by the nozzle mounting base (77) At the same time, an epoxy resin coating layer.
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);
An epoxy outer coating apparatus 220 for coating the epoxy coating layer 22 with epoxy powder supplied from the epoxy powder spraying apparatus 221 while supplying the heated steel pipe 20 from the heating apparatus 40 and rotating the rotated steel pipe 20 with the rotating apparatus 30 And an adhesive resin coating device 230 which is supplied with adhesive resin from the adhesive resin sprayer 231 and coats the adhesive resin layer 23 to the injection space 101 of the hopper 100, (50);
A steel pipe 20 coated with the epoxy coating layer 22 and the adhesive resin layer 23 is supplied and the polyethylene resin is supplied from the polyethylene resin injector 241 while being rotated by the rotating device 30 to coat the polyethylene coating layer 24 And an inner diameter coating apparatus (inner diameter coating apparatus) 70 for installing an epoxy resin inner diameter coating apparatus 70 for supplying an epoxy to the inner diameter epoxy coating layer 25 in the epoxy resin spraying apparatus 71 60) having an epoxy resin coating layer,
The outer diameter primary coating apparatus 50 supplies the heated steel pipe 20 from the heating apparatus 40 and rotates the rotating tube apparatus 30 to the rotary apparatus 30 while spraying the epoxy powder from the epoxy powder sprayer 221 through the epoxy supply pipe 222, An epoxy outer coating apparatus 220 for supplying an epoxy powder from an injection nozzle 226 at the tip of a plurality of nozzle pipes 225 after being supplied to the nozzle 224 to coat the epoxy coating 22;
The adhesive resin is injected to the nozzle bundle 234 through the adhesive resin injector 231 through the adhesive resin injector 231 and then supplied to the adhesive resin layer 23 from the injection nozzles 236 at the tip of the nozzle tubes 235, An adhesive resin coating apparatus 230 for coating the adhesive resin coating 230;
The epoxy outer diameter coating device 220 and the adhesive resin coating device 230 are installed in the injection space 101 of the hopper 100;
The nozzle bundles 224 and 225 are fixed to the fixing bolts 223a and 233a at the nozzle bundle fixing bases 223 and 233 at predetermined intervals and the nozzle bundle fixing bases 223 and 233 are fixed to the connecting bases 228 and 238, Are provided on both sides of the inclined inner wall (102) of the hopper (100) by connection bolts (228a, 238a) in the outer periphery of the hopper (100) to continuously coat the epoxy coating layer (22) and the adhesive resin layer An apparatus for manufacturing a steel pipe having a double coating and an epoxy resin coating layer simultaneously coating inner and outer diameters.
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);
An epoxy outer coating apparatus 220 for coating the epoxy coating layer 22 with epoxy powder supplied from the epoxy powder spraying apparatus 221 while supplying the heated steel pipe 20 from the heating apparatus 40 and rotating the rotated steel pipe 20 with the rotating apparatus 30 And an adhesive resin coating device 230 which is supplied with adhesive resin from the adhesive resin sprayer 231 and coats the adhesive resin layer 23 to the injection space 101 of the hopper 100, (50);
A steel pipe 20 coated with the epoxy coating layer 22 and the adhesive resin layer 23 is supplied and the polyethylene resin is supplied from the polyethylene resin injector 241 while being rotated by the rotating device 30 to coat the polyethylene coating layer 24 And an inner diameter coating apparatus (inner diameter coating apparatus) 70 for installing an epoxy resin inner diameter coating apparatus 70 for supplying an epoxy to the inner diameter epoxy coating layer 25 in the epoxy resin spraying apparatus 71 60) having an epoxy resin coating layer,
The outer diameter secondary coating and the inner diameter coating apparatus 60 are constructed such that a steel pipe 20 coated with an epoxy coating layer 22 and an adhesive resin layer 23 is supplied and rotated by a rotating device 30 while being discharged from a polyethylene resin injector 241 A polyethylene resin coating apparatus 24 for supplying polyethylene resin from the injection nozzles 246 at the tip ends of the plurality of nozzle tubes 245 and coating the polyethylene coating layer 24 after being supplied to the nozzle bundle 244 through the polyethylene resin supply pipe 242 240;
The inner diameter of the steel pipe 20 is supplied to the nozzle bundle 74 through the epoxy resin delivery pipe 73 in the epoxy resin injector 71 and then injected from the injection nozzle 76 at the tip end of the plurality of nozzle pipes 75, An epoxy resin inner diameter coating apparatus 700 for coating an inner diameter epoxy coating layer 25;
The polyethylene resin coating apparatus 240 is installed in the injection space 101 of the hopper 100;
The nozzle bundle 244 is fixed to the nozzle bundle holder 243 at a predetermined interval by the fixing bolt 243a and the nozzle bundle holder 243 is connected to the hopper 100 And the inner diameter of the steel pipe 20 is coated with the inner diameter epoxy coating layer 25 by the epoxy resin inner diameter coating device 70 And an epoxy resin coating layer for simultaneously coating the inner and outer diameters.
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);
An epoxy outer coating apparatus 220 for coating the epoxy coating layer 22 with epoxy powder supplied from the epoxy powder spraying apparatus 221 while supplying the heated steel pipe 20 from the heating apparatus 40 and rotating the rotated steel pipe 20 with the rotating apparatus 30 And an adhesive resin coating device 230 which is supplied with adhesive resin from the adhesive resin sprayer 231 and coats the adhesive resin layer 23 to the injection space 101 of the hopper 100, (50);
A steel pipe 20 coated with the epoxy coating layer 22 and the adhesive resin layer 23 is supplied and the polyethylene resin is supplied from the polyethylene resin injector 241 while being rotated by the rotating device 30 to coat the polyethylene coating layer 24 And an inner diameter coating apparatus (inner diameter coating apparatus) 70 for installing an epoxy resin inner diameter coating apparatus 70 for supplying an epoxy to the inner diameter epoxy coating layer 25 in the epoxy resin spraying apparatus 71 60) having an epoxy resin coating layer,
The outer diameter first coating device 50 having the epoxy outer diameter coating device 220 and the adhesive resin coating device 230 and the outer diameter secondary coating and inner diameter coating device 60 having the polyethylene resin coating device 240 A dust collecting apparatus 300 for collecting dust through a dust collector 310 connected to a dust collecting pipe 320 is provided at a lower discharge port 105 of the spray space 101 formed in the inclined inner wall 102 of the hopper 100 And an epoxy resin coating layer for simultaneously coating the inner and outer diameters.
KR1020150055945A 2015-04-21 2015-04-21 Of the outer diameter in the double coating and, at the same time the outer diameter of the steel tube manufacturing apparatus having the epoxy resin coating layer that coats KR101554883B1 (en)

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