KR102118946B1 - coating systems of muilt-PE and epoxy for steel pipe - Google Patents

coating systems of muilt-PE and epoxy for steel pipe Download PDF

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KR102118946B1
KR102118946B1 KR1020200016268A KR20200016268A KR102118946B1 KR 102118946 B1 KR102118946 B1 KR 102118946B1 KR 1020200016268 A KR1020200016268 A KR 1020200016268A KR 20200016268 A KR20200016268 A KR 20200016268A KR 102118946 B1 KR102118946 B1 KR 102118946B1
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South Korea
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steel pipe
coating
rotating
tank
layer
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KR1020200016268A
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Korean (ko)
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김준기
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(주)광성이엔지
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00Machines 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
    • B05B13/02Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0207Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe
    • B05B13/0214Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe the liquid or other fluent material being applied to the whole periphery of the cross section of the elongated body
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/32Shielding elements, i.e. elements preventing overspray from reaching areas other than the object to be sprayed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00Machines 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
    • B05B13/02Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/0235Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being a combination of rotation and linear displacement
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00Machines 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
    • B05B13/06Machines 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
    • B05B13/0609Machines 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 automatically fed to, or removed from, the machine
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2489Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
    • B05B7/2491Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device characterised by the means for producing or supplying the atomising fluid, e.g. air hoses, air pumps, gas containers, compressors, fans, ventilators, their drives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/002Pretreatement
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B05D3/0406Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
    • B05D3/0413Heating with air
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/12Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14Processes, 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
    • B05D7/148Processes, 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 using epoxy-polyolefin systems in mono- or multilayers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/22Processes, 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
    • B05D7/222Processes, 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 of pipes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50Multilayers
    • B05D7/56Three layers or more
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00Abrasive blasting machines or devices; Plants
    • B24C3/08Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
    • B24C3/10Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces for treating external surfaces
    • B24C3/14Apparatus using impellers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00Abrasive blasting machines or devices; Plants
    • B24C3/08Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
    • B24C3/16Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces for treating internal surfaces
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00Apparatus for cleaning or pickling metallic material
    • C23G3/04Apparatus for cleaning or pickling metallic material for cleaning pipes

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating Apparatus (AREA)

Abstract

The present invention relates to a three-layer PE and epoxy coating system which can adjust the width of a conveying device to coat steel pipes having various thicknesses while transferring the same, and can move the steel pipes in a constant direction and at a regular speed by adjusting the angle of a pushing roller configuring a steel pipe transporter which is installed in a conveyor, and relates to a coated steel pipe manufactured using the same.

Description

3층PE 및 에폭시 코팅시스템과 그를 이용해 제조된 코팅강관{coating systems of muilt-PE and epoxy for steel pipe}3-layer PE and epoxy coating system and coated steel pipe manufactured therefrom {coating systems of muilt-PE and epoxy for steel pipe}

본 발명은 3층PE 및 에폭시 코팅시스템과 그를 이용해 제조된 코팅강관에 관한 것으로, 상세하게는 이송장치의 폭을 조절할 수 있게 함에 따라 다양한 굵기의 강관을 이송하여 코팅할 수 있고, 강관을 이송시키는 콘베이어에 설치된 강관이송기를 구성하는 푸싱롤러의 각을 조정함에 따라 강관이 일정한 방향과 속도로 이동되게 한 3층PE 및 에폭시 코팅시스템과 그를 이용해 제조된 코팅강관에 관한 것이다. The present invention relates to a three-layer PE and epoxy coating system and a coated steel pipe manufactured using the same, and in detail, it is possible to transport and coat steel pipes of various thicknesses by controlling the width of the conveying device. The present invention relates to a three-layer PE and epoxy coating system that allows steel pipes to move at a constant direction and speed by adjusting the angle of a pushing roller constituting a steel pipe transporter installed in a conveyor, and to coated steel pipes manufactured using the same.

일반적으로 가스배관 및 수도용 배관 등 각종 유체 수송용으로 사용되는 강관은 내외부에 각각의 코팅층을 형성하여 녹이 발생되거나 외부의 충격으로부터 제품에 손상이 가는 것을 방지하고 있다. 이때, 강관의 코팅층에 사용되는 도료는 액상의 수지 또는 수지 분말을 사용하게 된다In general, steel pipes used for transporting various fluids, such as gas pipes and water pipes, have respective coating layers formed inside and outside to prevent rust or damage to the product from external impact. At this time, the coating material used for the coating layer of the steel pipe uses a liquid resin or resin powder.

가장 보편적으로 사용되는 강관의 외면에 도료를 도장하는 방식방법은, 강관의 외면을 폴리에틸렌으로 피복하거나 콜탈에나멜 또는 아스팔트에 의한 도장피복방법과, 비교적 새로운 방식 소재로 인식되고 있는 고분자 화합물에 의한 도장 피복방법으로서, 에폭시계 수지도료 또는 폴리우레탄계 수지도료를 피복하는 방법이 있다.The most commonly used method of coating a coating on the outer surface of a steel pipe is a method of coating the outer surface of a steel pipe with polyethylene or a coating coating method with coal tal enamel or asphalt, and a coating method with a polymer compound recognized as a relatively new method material. As a method, there is a method of coating an epoxy resin coating material or a polyurethane resin coating material.

또한, 강관에 대한 코팅제의 결합은 결합표면의 거친 정도나 코팅제의 가소성 변형 등에 대한 다양한 변수가 있기 때문에 단순히 물리적 부착이나 화학적 부착에 의해 코팅제의 부착성과 내구성을 다 설명하기는 어렵지만, 국내에서는 상수도관이나 하수도관의 부식을 방지하고 오염을 방지하기 위하여 에폭시수지를 이용한 피막으로 많이 처리되어 왔다.In addition, the bonding of the coating agent to the steel pipe is difficult to describe the adhesion and durability of the coating agent by physical or chemical attachment simply because there are various variables such as the roughness of the bonding surface or the plastic deformation of the coating agent. In order to prevent corrosion and contamination of sewer pipes, it has been treated with a film using an epoxy resin.

이와 같이, 상수도관이나 하수도관의 부식을 방지하고 오염을 방지하기 위하여 주로 에폭시수지를 이용하여 피막 처리되어 왔지만, 최근에 에폭시수지가 많은 유해물을 함유하고 있고 상수관으로 사용할 때 많은 부작용이 있다고 알려짐으로써 폴리우레탄 또는 폴리우레아를 사용한 도료의 개발에 많은 노력을 기울이고 있다.As described above, in order to prevent corrosion of water pipes or sewer pipes and to prevent contamination, it has been mainly coated with an epoxy resin, but recently epoxy resins contain many harmful substances and are known to have many side effects when used as water pipes. As a result, much effort has been devoted to the development of paints using polyurethane or polyurea.

상기 폴리우레탄 도료는 부착력이 떨어지고 반응성이 불균일하여 실용화하기에 어려움이 있으며, 이러한 코팅제의 물리적 부착강도를 높이기 위하여 강관의 표면을 쇼트(Shot), 샌드(Sand) 등에 의한 브라스팅(Blasting)으로 처리하는 등의 방법을 동시에 강구하고 있는 실정이다The polyurethane paint has poor adhesion and non-uniform reactivity, making it difficult to put into practical use. In order to increase the physical adhesion strength of these coatings, the surface of the steel pipe is treated by blasting by shot, sand, etc. It is a situation that is simultaneously seeking methods such as

이러한 기술의 예로 특허문헌 1 내지 3이 있다. Examples of such technology are Patent Documents 1 to 3.

특허문헌 1은 분말 에폭시, 접착성 폴리에틸렌 및 분말 폴리에틸렌을 각각 저장하기 위한 분말저장통과; 분말저장통의 상측에 배치되고 직관의 양단부가 안착된 상태에서 직관을 회전시키되, 분말저장통의 상부 양측에 각각 2개씩 설치되는 회전모터와, 각각의 회전모터에 구비되고, 분말저장통의 상측으로 돌출됨과 아울러 직관의 양단부를 안착시켜 회전모터의 회전운동에 따라 회전됨으로써 직관을 회전시키며, 외주면에 걸림턱이 형성되어 직관의 수평방향 운동을 제어하는 회전축으로 이루어지는 회전수단과; 일측이 분말저장통에 연결되어 분말저장통에 저장된 분말 에폭시, 접착성 폴리에틸렌 및 분말 폴리에틸렌을 직관의 상측으로 이송하는 분말이송수단과; 일측이 분말이송수단의 타측과 연결되어 분말 에폭시, 접착성 폴리에틸렌 및 분말 폴리에틸렌을 직관을 향해 순차적으로 수직낙하시켜 직관의 외면을 코팅하고, 그 타측에 분말저장통과 연결되는 분말배출수단이 더 설치되어, 분말낙하수단에서 직관을 향하여 낙하되고 남은 분말 에폭시, 접착성 폴리에틸렌 및 분말 폴리에틸렌을 분말저장통으로 이송시키도록 된 분말낙하수단과; 분말낙하수단에 의하여 외면이 코팅된 직관의 내면에 폴리우레아를 코팅하되, 폴리우레아가 저장된 분사기와, 일단이 분사기에 연결되고 타단이 직관의 내면쪽에 인입되어 폴리우레아를 직관의 내면쪽으로 안내하며 외주면에 열선이 감긴 이송관과, 이송관의 타단에 설치되어 폴리우레아를 직관의 내면에 분사하는 분사노즐로 이루어진 내면코팅수단;을 포함하여 구성된 3층 폴리에틸렌과 폴리우레아를 강관에 코팅하는 장치이고, Patent Document 1 is a powder storage passage for storing powdered epoxy, adhesive polyethylene and powdered polyethylene, respectively; It is disposed on the upper side of the powder storage container and rotates the straight tube in a state where both ends of the straight tube are seated, and the rotary motors are provided on each of the upper and lower sides of the powder storage container, and are provided on each rotary motor, protruding upwards of the powder storage container and In addition, the rotation means consisting of a rotating shaft for seating both ends of the straight tube to rotate the straight tube by being rotated according to the rotational motion of the rotary motor, a locking jaw is formed on the outer peripheral surface to control the horizontal movement of the straight tube; A powder transfer means having one side connected to the powder reservoir to transfer the powder epoxy, adhesive polyethylene and powder polyethylene stored in the powder reservoir to the upper side of the straight tube; One side is connected to the other side of the powder transfer means, and powder epoxy, adhesive polyethylene and powder polyethylene are sequentially vertically dropped toward the straight tube to coat the outer surface of the straight tube, and on the other side, a powder discharge means connected to the powder reservoir is further installed. , Powder dropping means for transferring the remaining powder epoxy, adhesive polyethylene and powdered polyethylene to the powder reservoir through the powder dropping means toward the straight tube; The polyurea is coated on the inner surface of the straight pipe coated with the outer surface by the powder dropping means, the polyurea is stored in the sprayer, one end is connected to the sprayer, and the other end is inserted into the inner surface of the straight pipe to guide the polyurea toward the inner surface of the straight pipe and the outer circumferential surface It is a device for coating a three-layered polyethylene and polyurea on a steel pipe comprising a transfer pipe wound with a heating wire and an injection nozzle installed at the other end of the transfer pipe and spraying polyurea to the inner surface of the straight pipe.

특허문헌 2는 측면이 개폐가능하게 구성된 가열실 내부에 배치되고, 강관이 안착된 상태에서 강관을 수평하게 회전시키는 회전수단과; 가열실 내부에 배치됨과 아울러 회전수단의 하측에 배치되어 강관을 가열하는 가열수단과; 가열수단에 의하여 가열된 강관의 표면에 에폭시와 개질 폴리에틸렌 및 폴리에틸렌을 순차적으로 코팅하는 외면코팅수단과; 외면코팅수단에 의하여 표면이 코팅된 강관을 냉각시키는 냉각수단과; 냉각수단에 의하여 냉각된 강관의 내면에 세라믹을 코팅하는 내면코팅수단;으로 구성된 3층 폴리에틸렌과 세라믹을 강관에 코팅하는 장치이며, Patent document 2 is disposed inside the heating chamber is configured to open and close the side, and the rotating means for horizontally rotating the steel pipe in a state where the steel pipe is seated; A heating means disposed inside the heating chamber and disposed under the rotating means to heat the steel pipe; An outer coating means for sequentially coating epoxy, modified polyethylene and polyethylene on the surface of the steel pipe heated by the heating means; Cooling means for cooling the steel pipe whose surface is coated by the outer coating means; An inner coating means for coating the ceramic on the inner surface of the steel pipe cooled by the cooling means; a device for coating the three-layer polyethylene and ceramic consisting of steel pipe,

특허문헌 3은 강관; 강관 내측 표면에 형성된 제1 코팅층; 및 제1 코팅층상에 형성된 제2 코팅층;을 포함하고, 제1 코팅층은, 제1 변성 에폭시 36~54 중량%, 황산바륨 21~29 중량%, 암모늄 디하이드로젠 포스페이트 6~16 중량%, 증점제 5~11 중량% 및 안료 2~8 중량%를 포함하는 제1 주제; 및 제1 변성 아민 62~83 중량%, 증점제 14~24 중량%, 경화촉진제 1~10 중량% 및 4차 암모늄 점토 1~10 중량%를 포함하는 제1 경화제;의 반응에 의해 형성되며, 제2 코팅층은, 제2 변성 에폭시 38~55 중량%, 황산바륨 28~38 중량%, 증점제 5~14 중량%, 안료 5~12 중량%, 트리글리시딜 에테르 2~7 중량% 및 변성 페놀 1~5 중량%를 포함하는 제2 주제; 및 제2 변성 아민 72~87 중량%, 증점제 12~20 중량% 및 4차 암모늄 점토 1~8 중량%를 포함하는 제2 경화제;의 반응에 의해 형성되고, 제1 변성 에폭시는, 캐슈 넛쉘 리퀴드 수지로 변성된 에피클로로하이드린 비스페놀A 수지를 포함하며, 제2 변성 에폭시는, 캐슈 넛쉘 리퀴드 수지와 아크릴로니트릴-부타디엔 수지로 변성된 에피클로로하이드린 비스페놀A 수지를 포함하는, 다층 코팅 강관이다. Patent Document 3 is a steel pipe; A first coating layer formed on the inner surface of the steel pipe; And a second coating layer formed on the first coating layer, wherein the first coating layer comprises 36 to 54% by weight of the first modified epoxy, 21 to 29% by weight of barium sulfate, 6 to 16% by weight of ammonium dihydrogen phosphate, and a thickener. A first subject comprising 5-11% by weight and 2-8% by weight of pigment; And a first curing agent comprising 62 to 83% by weight of the first modified amine, 14 to 24% by weight of a thickener, 1 to 10% by weight of a curing accelerator, and 1 to 10% by weight of a quaternary ammonium clay; 2 The coating layer is 38 to 55% by weight of the second modified epoxy, 28 to 38% by weight of barium sulfate, 5 to 14% by weight of the thickener, 5 to 12% by weight of the pigment, 2 to 7% by weight of triglycidyl ether and 1 to 4 of modified phenol. A second subject comprising 5% by weight; And a second curing agent comprising 72 to 87% by weight of a second modified amine, 12 to 20% by weight of a thickener, and 1 to 8% by weight of a quaternary ammonium clay; and the first modified epoxy is a cashew nutshell liquid. Resin-modified epichlorohydrin bisphenol A resin, and the second modified epoxy is a multi-layer coated steel pipe comprising cashew nutshell liquid resin and epichlorohydrin bisphenol A resin modified with acrylonitrile-butadiene resin. .

이와 같이 다양한 코팅 강관 기술이 개발되고 있으나, 강관의 지름에 능동적으로 대처할 수 있어 강관의 굵기에 따라 서로 다른 장치를 이용하여야 하는 문제가 있다. As described above, various coated steel pipe technologies have been developed, but there is a problem in that different devices may be used depending on the thickness of the steel pipe because it can actively cope with the diameter of the steel pipe.

또한 강관이 일정한 방향으로 이동될 수 있어야 하지만 강관이 가이드레일을 벗어나 이동경로로부터 이탈되는 문제가 있다. In addition, the steel pipe should be able to move in a certain direction, but there is a problem that the steel pipe deviates from the movement path beyond the guide rail.

대한민국 등록특허 제10-0898838호Republic of Korea Registered Patent No. 10-0898838 대한민국 등록특허 제10-0806942호Republic of Korea Registered Patent No. 10-0806942 대한민국 등록특허 제10-1937179호Republic of Korea Registered Patent No. 10-1937179

본 발명은 상기와 같은 종래기술의 문제점을 해결하기 위해 개발된 것으로, 이송장치의 폭을 조절할 수 있게 함에 따라 다양한 굵기의 강관을 이송하여 코팅할 수 있고, 강관을 이송시키는 콘베이어에 설치된 강관이송기를 구성하는 푸싱롤러의 각을 조정함에 따라 강관이 일정한 방향과 속도로 이동되게 한 3층PE 및 에폭시 코팅시스템과 그를 이용해 제조된 코팅강관을 제공하는 것을 목적으로 한다. The present invention has been developed to solve the problems of the prior art as described above, and can be coated by transporting steel pipes of various thicknesses as it allows the width of the conveying device to be adjusted, and a steel pipe transporter installed in a conveyor for transporting steel pipes It is an object of the present invention to provide a three-layer PE and epoxy coating system that allows steel pipes to be moved at a constant direction and speed by adjusting the angle of a pushing roller constituting a coating steel pipe manufactured using the same.

상기와 같은 목적을 해결하기 위한 본 발명에 따른 3층PE 및 에폭시 코팅시스템은 레일간격조절기에 의해 간격이 조절되는 평행하게 설치된 두 개의 가이드레일 (11, 12), 강관을 길이 방향으로 일정하게 이동시키는 다수의 이송롤러들 중 일부에는 구동수단을 설치하여 이송롤러를 구동시킴에 의해 강관을 길이 방향으로 이동시키는 강관이송기와, 상기 가이드레일의 후단에 설치되어 강관을 감지하는 강관감지센서, 및 강관을 감지하면 강관이송기를 정지시키고 작동하여 강관을 일측으로 밀어 대기공간으로 이동시키는 키커로 이루어진 강관공급라인; 상기 강관공급라인의 중단에 설치되어 통과하는 강관의 외부에 쇼트 또는 그리트를 분사하여 외부의 이물질을 분리하는 외부쇼트기; 상기 강관공급라인을 통해 이송되어 배출된 강관을 가열하는 가열로; 가열된 강관의 양단에 각각 체일을 걸수 있도록 회전캡을 장착하는 회전캡장착부; FBE, 접착제 및 폴리에틸렌이 저장된 탱크가 순차적으로 설치되어 있으며, 각 탱크의 하부에는 에어블로어가 설치되어 저장된 도료에 공기를 공급하여 공기에 의해 분해된 도료의 미분이 강관에 순차적으로 코팅되게 하는 외부코팅장치; 강관의 양단에 설치된 회전캡을 분리하는 회전캡분리부; 구동수단의 구동에 의해 회전하는 강관의 내부에 고압의 물과 공기를 분사하여 코팅과정에서 강관의 내부에 묻은 물질을 제거하는 냉각/수세수단; 회전롤러에 의해 회전하는 강관의 일측에 설치되어 강관의 내부로 이동하면서 그리트를 분사하는 그리트분사기와, 상기 그리트분사기를 강관의 길이 방향으로 왕복이동시키는 이동수단로 이루어진 내부블라스팅장치; 블라스팅된 강관의 내부에 열풍을 공급하여 습기를 제거하는 건조수단; 가이드레일을 따라 이동하는 분사관이동수단의 일측에 적어도 강관의 길이 이상의 길이는 갖는 도료분사관을 설치하고 분사관의 단부에 적어도 2대 이상의 분사노즐을 설치하여 분사되는 도료가 회전롤러의 구동에 의해 회전하는 강관의 내벽에 코팅되게 하는 내부코팅수단을 포함하는 것을 특징으로 한다.The three-layer PE and epoxy coating system according to the present invention for solving the above object are two guide rails (11, 12), which are installed in parallel in which the spacing is controlled by the rail spacing controller, and the steel pipes are constantly moved in the longitudinal direction. A steel pipe transporter that moves a steel pipe in a longitudinal direction by driving a transport roller by installing a driving means in some of the plurality of transport rollers, and a steel pipe detection sensor installed at a rear end of the guide rail to detect the steel pipe, and A steel pipe supply line consisting of a kicker that stops and operates the steel pipe transporter when it detects the steel pipe and moves the steel pipe to one side to move it to the atmospheric space; An external shorter installed at the middle of the steel pipe supply line to separate foreign substances by spraying shots or grits on the outside of the steel pipes passing through; A heating furnace for heating the steel pipes transferred and discharged through the steel pipe supply line; Rotating cap mounting unit for mounting a rotating cap to be attached to both ends of the heated steel pipe; Tanks in which FBE, adhesives, and polyethylene are stored are sequentially installed, and an air blower is installed at the bottom of each tank to supply air to the stored paints so that the fine powder of the paint decomposed by air is coated on the steel pipes sequentially. Device; A rotating cap separating part separating the rotating caps installed at both ends of the steel pipe; A cooling/washing means for removing substances deposited on the inside of the steel pipe during the coating process by spraying high pressure water and air inside the rotating steel pipe by driving of the driving means; An inner blasting device installed on one side of the steel pipe rotated by a rotating roller and configured to move the inside of the steel pipe to spray the grit, and a moving means for reciprocating the grit jet in the longitudinal direction of the steel pipe; Drying means for removing moisture by supplying hot air to the inside of the blasted steel pipe; On one side of the spray pipe moving means moving along the guide rail, a paint spray pipe having a length of at least the length of the steel pipe is installed, and at least two spray nozzles are installed at the ends of the spray pipe to spray the paint to drive the rotating roller. It characterized in that it comprises an inner coating means to be coated on the inner wall of the rotating steel pipe.

상기 강관이송기는 회전하여 강관을 길이 방향으로 일정하게 이동시키는 다수의 이송롤러; 다수의 이송롤러들 중 일부를 구동시키는 구동수단; 및 일단은 가이드레일에 고정되고 타단은 이송롤러가 힌지 고정된 지지대에 힌지 결합되어 두 단부 사이의 거리를 조절함에 의해 이송롤러의 각도를 조절하여 이송롤러가 강관의 이송방향으로 토우인을 이루게 하는 롤러각도조절기로 이루어질수 있다.The steel pipe transporter rotates a plurality of transport rollers to move the steel pipe constant in the longitudinal direction; Driving means for driving a part of the plurality of transport rollers; And one end is fixed to the guide rail and the other end is hinged to a support on which the transport roller is hinged to adjust the angle of the transport roller by adjusting the distance between the two ends, thereby allowing the transport roller to form a toe-in in the transport direction of the steel pipe. It can be made with an angle adjuster.

상기 레일간격조절기는 두 개의 가이드레일을 수직으로 관통하여 설치되고 중앙을 중심으로 양측에 각각 반대방향으로 나사산이 형성된 양방향볼트와, 상기 양방향볼트를 회전시키는 회전손잡이로 구성될 수 있다.The rail spacing adjuster may be formed of a two-way bolt installed vertically through the two guide rails, and a bidirectional bolt having threads formed in opposite directions on both sides of the center, and a rotating handle rotating the bidirectional bolt.

상기 외부쇼트기는 강관의 중심으로 등간격으로 배치되고, 쇼트볼을 공급하는 쇼트볼공급기와, 쇼트볼공급기에 의해 공급된 쇼트볼을 고속으로 회전하는 회전날개로 타격하여 강관을 타격하는 임펠러로 이루어진다. The external shorter is arranged at equal intervals as the center of the steel pipe, and is composed of a short ball supplyer supplying the short ball, and an impeller hitting the steel pipe by hitting the short ball supplied by the short ball with a rotating blade rotating at high speed. .

상기 외부코팅장치는 FBE코팅탱크, 접착제코팅탱크 및 PE코팅탱크이 순차적으로 설치되고, The external coating device is sequentially installed FBE coating tank, adhesive coating tank and PE coating tank,

각각은 코팅 도료가 저장되는 도료탱크와, 도료탱크의 저면으로부터 공기를 불어넣어 도료들이 미분으로 부유하여 강관의 표면에 코팅되게 하는 에어블로워로 이루어질 수 있다.Each may consist of a paint tank in which the coating paint is stored, and an air blower that blows air from the bottom surface of the paint tank so that the paint floats as fine powder and is coated on the surface of the steel pipe.

상기 내부블라스팅장치는 그리드분사기의 후단에 에어분사 노즐을 설치하여 공기커튼을 형성하는 것이 바람직하다.It is preferable that the inner blasting device forms an air curtain by installing an air injection nozzle at a rear end of the grid injection machine.

본 발명에 따른 3층PE 및 에폭시 코팅시스템3-layer PE and epoxy coating system according to the present invention

도 1은 본 발명에 따른 3층PE 및 에폭시 코팅시스템의 평면도와 측면도
도 2는 본 발명에 따른 3층PE 및 에폭시 코팅시스템을 구성하는 강관이송기의 평면도
도 3은 본 발명에 따른 3층PE 및 에폭시 코팅시스템을 구성하는 외부쇼트기의 정면도
도 4는 도 1의 A 부분을 확대한 키커의 측면도
도 5는 도 1의 B 부분을 확대한 스토퍼의 측면도
도 6은 본 발명에 따른 3층PE 및 에폭시 코팅시스템을 구성하는 외부코팅장치의 구성도
도 7은 본 발명에 따른 3층PE 및 에폭시 코팅시스템을 구성하는 내부브라스팅 장치의 구성도
도 8은 본 발명에 따른 3층PE 및 에폭시 코팅시스템을 구성하는 내부코팅장치의 구성도
1 is a plan view and a side view of a three-layer PE and epoxy coating system according to the present invention
Figure 2 is a plan view of a steel pipe transporter constituting a three-layer PE and epoxy coating system according to the present invention
Figure 3 is a front view of the external shorter constituting the three-layer PE and epoxy coating system according to the present invention
4 is a side view of a kicker enlarging part A of FIG. 1;
FIG. 5 is a side view of the stopper enlarged in part B of FIG. 1.
6 is a block diagram of an external coating device constituting a three-layer PE and epoxy coating system according to the present invention
7 is a block diagram of an internal blasting device constituting a three-layer PE and epoxy coating system according to the present invention
8 is a block diagram of an internal coating device constituting a three-layer PE and epoxy coating system according to the present invention

본 발명은 다양한 변경을 가하여 실시할 수 있는 바, 특정 실시예들을 도면에 예시하고, 상세한 설명을 통해 설명하고자 한다. 그러나 이는 본 발명을 특정한 실시 형태에 대해 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다.The present invention can be implemented by applying various changes, and specific embodiments are illustrated in the drawings and will be described through detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

각 도면을 설명하면서 유사한 참조부호를 유사한 구성요소에 대해 사용하였다. 본 발명을 설명함에 있어서 관련된 공지 기술에 대한 구체적인 설명이 본 발명의 요지를 흐릴 수 있다고 판단되는 경우 그 상세한 설명을 생략한다.In describing each drawing, similar reference numerals are used for similar components. In the description of the present invention, when it is determined that detailed descriptions of related known technologies may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

본 발명은 이송장치의 폭을 조절할 수 있게 함에 따라 다양한 굵기의 강관을 이송하여 코팅할 수 있다. The present invention can be coated by transporting steel pipes of various thicknesses as the width of the conveying device can be adjusted.

본 발명에 따른 3층PE 및 에폭시 코팅시스템은 도 1에 도시한 바와 같이, 강관공급라인(10), 외부쇼트기(20), 가열료(30), 회전캡정척부(C1), 외부코팅장치(40), 회전캡분리부(C2), 냉각/수세수단(50), 내부블라스팅장치(60), 건조수단(70), 및 내부코팅수단(80)을 포함하고 있다. 3 layer PE and epoxy coating system according to the present invention, as shown in Figure 1, the steel pipe supply line 10, the external shorter 20, the heating material 30, the rotating cap cleaning part (C1), an external coating device (40), the rotating cap separation unit (C2), cooling / washing means 50, an internal blasting device 60, a drying means 70, and an internal coating means 80.

상기 강관공급라인(10)은 코팅할 강관을 후속 처리 공정으로 이동시키기 위한 수단으로 그 중간에 상기한 외부쇼트기(20)가 설치되어 있다.The steel pipe supply line 10 is a means for moving the steel pipe to be coated to a subsequent treatment process, the external shorter 20 is installed in the middle.

상기 강관공급라인(10)은 도 1에 도시한 바와 같이 서로 평행하게 설치된 두 개의 가이드레일(11, 12)를 구비하고 있으며 이들 사이의 거리를 조절함에 따라 서로 다른 직경의 강관을 이송 및 처리할 수 있다.The steel pipe supply line 10 is provided with two guide rails 11 and 12 installed parallel to each other as shown in FIG. 1, and can transport and process steel pipes of different diameters by adjusting the distance between them. Can be.

이를 위해 두 개의 가이드레일(11, 12) 들 사이에는 레일간격조절기(13)가 설치되어 있다.To this end, a rail spacing adjuster 13 is installed between the two guide rails 11 and 12.

상기 레일간격조절기(13)는 최소한 2개 이상 설치되어 있어야 하고, 설치되는 수는 가이드레일의 길이에 따라 달라질 수 있다.At least two rail spacing regulators 13 should be installed, and the number of the rails may vary depending on the length of the guide rail.

상기 가이드레일의 상부에는 지지대가 더 설치되어 있고, 이 지지개와 가이드레일 사이에는 이송롤러(14r)가 등간격으로 다수가 설치되어 있다.A support is further installed on the upper portion of the guide rail, and a plurality of transfer rollers 14r are installed at equal intervals between the support dog and the guide rail.

상기 레일간격조절기(13)는 두 개의 가이드레일을 수직으로 관통하여 설치되고 중앙을 중심으로 양측에 각각 반대방향으로 나사산이 형성된 양방향볼트(13s)와, 상기 양방향볼트를 회전시키는 회전손잡이(13h)로 구성되어 회전손잡이의 회전 방향에 따라 두 가이드레일들 사이의 걸 리가 좁혀지거나 넓어 질 수 있다. The rail spacing adjuster 13 is installed through two guide rails vertically and has bidirectional bolts 13s having threads formed in opposite directions on both sides of the center, and a rotating handle 13h for rotating the bidirectional bolts. Consisting of can be narrowed or widened between the two guide rails depending on the direction of rotation of the rotating handle.

이렇게 설치된 이송롤러(14r)들 중 일부는 구동수단(14m)으 구동에 의해 회전을 하여 강관을 원하는 방향으로 밀어 이동시킨다.Some of the transport rollers 14r installed in this way are rotated by driving by the driving means 14m to push and move the steel pipe in a desired direction.

이송롤러의 회전방향을 강관의 이동방향과 같게 하면 이송롤러의 회전이 용이해질 수 있으나 외부의 작은 충격에 의해서도 강관이 흔들릴 수 있다.If the rotation direction of the transfer roller is the same as the movement direction of the steel pipe, rotation of the transfer roller may be facilitated, but the steel pipe may be shaken by a small external impact.

이에 따라 이송롤러(14r)는 강관이 이송하는 방향을 향하여 토우인(toe-in)을 이루게 하는 것이 바람직하고, 상기 레일간격조절기에 의해 두 가이드레일 사이의 거리가 조절된 상태에서도 이 토우인 각을 유지할 수 있게 하는 것이 바람직하다.Accordingly, it is preferable that the transfer roller 14r is toe-in toward the direction in which the steel pipe is conveyed, and maintains this toe-in angle even when the distance between the two guide rails is adjusted by the rail spacing controller. It is desirable to be able to.

이에 따라 상기 강관이송기(14)는 회전하여 강관을 길이 방향으로 일정하게 이동시키는 다수의 이송롤러(14r); 다수의 이송롤러들 중 일부를 구동시키는 구동수단(14m); 및 일단은 가이드레일에 고정되고 탁단은 이송롤러가 힌지 고정된 지지대에 힌지 결함되어 두 단부 사이의 거리를 조절함에 의해 이송롤러의 각도를 조절하여 이송롤러가 강관의 이송방향으로 토우인을 이루게 하는 롤러각도조절기(14c)로 구성하였다. Accordingly, the steel pipe transporter 14 rotates a plurality of transport rollers (14r) to move the steel pipe constantly in the longitudinal direction; A driving means (14m) for driving a part of the plurality of transport rollers; And one end is fixed to the guide rail and the table is hinged to the support on which the transport roller is hinged, thereby adjusting the angle of the transport roller by adjusting the distance between the two ends so that the transport roller forms a toe-in in the transport direction of the steel pipe It was configured as an angle adjuster (14c).

상기 각도조절기(14c)는 도 2에 도시한 바와 같이 가이드레일에 연결된 힌지점과 지지대에 연결된 힌지점 사이의 거리를 조절함에 의해 이송롤러의 각도가 조절된다. As shown in FIG. 2, the angle adjuster 14c adjusts the angle of the conveying roller by adjusting the distance between the hinge point connected to the guide rail and the hinge point connected to the support.

또한 상기 가이드레일의 후단에는 강관을 감지하는 강관감지센서(15), 및 강관을 감지하면 강관이송기를 정지시키고 작동하여 강관을 일측으로 밀어 대기공간(20p)으로 이동시키는 키커(16)가 더 구비되어 있다.In addition, at the rear end of the guide rail, a steel pipe detection sensor 15 that detects a steel pipe, and a kicker 16 that stops and operates the steel pipe transporter when it detects a steel pipe, moves the steel pipe to one side, and moves it to the waiting space 20p. It is equipped.

상기 강관감지센서(15)는 도 1에 도시한 바와 같이 가이드레일의 마지막 단부에 설치되어 있고, 적외선센서나 마이크로스위치 등으로 구성될 수 있다.The steel pipe detection sensor 15 is installed at the last end of the guide rail as shown in Figure 1, it may be composed of an infrared sensor or a micro switch.

상기 강관감지센서(15)에서 강관의 일측 단부가 감지되면 상기 키커(16)가 작동한다. When one end of the steel pipe is sensed by the steel pipe detection sensor 15, the kicker 16 operates.

상기 키커(16)는 도 4에 도시한 바와 같이 강관의 저면에 설치되어 실린더의 구동에 의해 회동하여 강관을 원하는 방향으로 밀어내는 작동을 한다.The kicker 16 is installed on the bottom surface of the steel pipe as shown in FIG. 4 to rotate by driving the cylinder to push the steel pipe in a desired direction.

상기한 바와 같이 상기 강관공급라인의 중단에는 통과하는 강관의 외부에 일정한 비율의 쇼트볼 또는 그리트를 분사하여 외부의 이물질을 분리하는 외부쇼트기(20)를 구비하고 있다.As described above, the middle of the steel pipe supply line is provided with an external shorter 20 that separates foreign substances from the outside by injecting a certain amount of short ball or grit to the outside of the steel pipe passing through.

상기 외부쇼트기(20)는 도 3에 도시한 바와 같이 강관(100)을 중심으로 방사상으로 다수가 설치될 수 있으며, 쇼트볼과 그리트를 공급하는 쇼트볼/그리트공급기(21)와, 고속으로 회전하여 쇼트볼/그리트공급기에 의해 공급된 쇼트볼 및 그리트를 고속으로 강관으로 뿌려 강관을 타격하는 임펠러(22)로 이루어진다. As shown in FIG. 3, the external shorter 20 may be installed in a radial direction around the steel pipe 100, and a short ball/grit supply 21 for supplying short balls and grits, and at a high speed. It consists of an impeller 22 that rotates and sprinkles the short ball and grit supplied by the short ball/grit feeder into the steel pipe at high speed to strike the steel pipe.

즉 임펠러날개들 사이에 쇼트볼과 그리트가 공급된 상태에서 임펠러가 고속으로 회전함에 의해 윈심력에 의해 쇼트볼과 그리트가 강관의 외벽을 타격하는 것이다 That is, the short ball and the grit hit the outer wall of the steel pipe by the winshim force by rotating the impeller at high speed while the short ball and the grit are supplied between the impeller wings.

상기 가열료(30)는 상기 강관공급라인을 통해 이송되어 배출된 강관을 가열하여 물성을 변화시킴에 의해 후처리 공정이 원활하게 이루어지게 한다. The heating agent 30 is heated through the steel pipe supply line to heat the discharged steel pipe to change the physical properties to facilitate the post-treatment process.

가열된 강관의 양단에 각각 체인을 걸 수 있도록 회전캡을 장착하는 회전캡장착부(C1)를 구비하고 있다.It is equipped with a rotating cap mounting portion (C1) for mounting a rotating cap so that each chain can be attached to both ends of the heated steel pipe.

회전캡은 이후 처리공정에서 강관을 체인으로 들어올려 체인을 회전시킴에 이해 외부 코일을 용이하게 할 수 있게 한다The rotating cap lifts the steel pipe into the chain in the subsequent processing process to rotate the chain so that the outer coil can be easily understood.

상기 외부코팅장치(40)는 FBE(Fusion Bonded Epoxy), 접착제 및 폴리에틸렌(PE)이 저장된 탱크가 순차적으로 설치되어 있으며, 각 탱크에 저장된 도료강관에 순차적으로 코팅한다.In the external coating device 40, tanks in which FBE (Fusion Bonded Epoxy), adhesives, and polyethylene (PE) are stored are sequentially installed, and are sequentially coated on the coating steel pipes stored in each tank.

상기 외부코팅장치(40)는 FBE코팅탱크(41), 접착제코팅탱크(42) 및 PE코팅탱크(43)이 순차적으로 설치되고, 각각은 코팅 도료가 저장되는 도료탱크(41t, 42t, 43t)와, 도료탱크의 저면으로부터 공기를 불어넣어 도료들이 미분으로 부유하여 강관의 표면에 코팅되게 하는 에어블로워(41a~43a)로 이루어진다. The external coating device 40 is a FBE coating tank 41, an adhesive coating tank 42 and a PE coating tank 43 are sequentially installed, each of which is a coating tank (41t, 42t, 43t) for coating coating is stored Wow, air blowers from the bottom surface of the paint tank are made of air blowers (41a to 43a), which allow the paints to float as fine powder and be coated on the surface of the steel pipe.

물론 각 탱크의 바닥에 미세한 공기통로를 형성하고 그 위해 천을 다층으로 겹쳐 에어블로워에서 공급된 공기에 의해 분리되어 탱크 내부에 부유하고 이렇게 부유하는 도료가 강관에 부착되게 하는 것이 바람직하다. 물론, 탱크에 형성된 구멍은 1mm이하이고 그 위해 섬유를 설치할 수 있다. Of course, it is preferable to form a fine air passage at the bottom of each tank, and for that purpose, overlap the fabric in multiple layers to separate the air supplied from the air blower, thereby allowing the floating and floating paint to adhere to the steel pipe. Of course, the hole formed in the tank is 1 mm or less, and fibers can be installed therefor.

외부코팅이 종료되면 내부 코팅 과정이 수행되며 이를 위해 강관의 양단에 설치된 회전캡을 분리하는 회전캡분리부(C2)를 구비하고 있다. When the outer coating is finished, the inner coating process is performed, and for this purpose, a rotating cap separation unit C2 is provided to separate the rotating caps installed at both ends of the steel pipe.

내부코팅 전에는 강관의 양단을 방청처리하는 것이 바람직하고, 코팅 후에는 냉각/수세수단(50)으로 강관을 냉각하고 세척한다.It is preferable to rust-proof both ends of the steel pipe before the inner coating, and after coating, the steel pipe is cooled and washed with a cooling/washing means 50.

상기 냉각/수세수단(50)은 구동수단(구동롤러)의 구동에 의해 회전하는 강관의 내부에 고압의 물을 분사하여 강관 냉각 및 코팅과정에서 강관의 내부에 묻은 이물질을 제거하고 물분사에 의해 강관 표면에 남아 있는 수분은 공기분사에 의해 제거한다.The cooling/flushing means 50 sprays high-pressure water into the rotating steel pipe by driving of a driving means (driving roller) to remove foreign substances from the inside of the steel pipe during cooling and coating of the steel pipe and by spraying water. Water remaining on the surface of the steel pipe is removed by air spray.

냉각 및 수세가 종료된 강관은 방청부 테이핑을 통해 단부를 보호한다, After cooling and flushing, the steel pipe protects the end through tapping of the anti-corrosion part.

상기 내부블라스팅장치(60)는 강관 내부에 묻어 있는 이물질을 제거하기 위한 장치로, 도 7에 도시한 바와 같이, 회전롤러(61)에 의해 회전하는 강관의 일측에 설치되어 강관의 내부로 이동하면서 그리트를 분사하는 그리트분사기(63)와, 상기 그리트분사기를 강관의 길이 방향으로 왕복 이동시키는 이동수단(64)로 이루어진다. The inner blasting device 60 is a device for removing foreign matters buried inside the steel pipe, as shown in Figure 7, while being installed on one side of the steel pipe rotated by the rotary roller 61 while moving to the inside of the steel pipe It consists of a grit sprayer (63) for spraying the grit and a moving means (64) for reciprocating the grit sprayer in the longitudinal direction of the steel pipe.

또한 상기 내부블라스팅장치(60)는 그리드분사기의 후단에 에어분사노즐(65)을 원형 형태로 다수 설치하여 공기커튼을 형성함에 의해 블라스팅 과정에서 비산되는 먼지를 외부로 밀어낼 수 있게 하였으며, 강관의 양단을 지지하는 단부하우징(62)들 중 내부블라스팅장치 반대측에 설치된 단부하우징에는 제진기(66)를 더 설치하여 블라스팅을 하는 과정에서 생성된 먼지를 흡수하여 배출시킬 수 있게 하였다. In addition, the inner blasting device 60 was installed in a plurality of air injection nozzles 65 in a circular shape at the rear end of the grid sprayer to form air curtains, thereby allowing dust scattered during the blasting process to be pushed out. Among the end housings 62 supporting both ends, a dust absorber 66 is further installed on the end housing installed on the opposite side of the inner blasting device to absorb and discharge dust generated during the blasting process.

상기 건조수단(70)은 블라스팅된 강관의 내부에 열풍을 공급하여 습기를 제거하는 역할을 한다. The drying means 70 serves to remove moisture by supplying hot air to the inside of the blasted steel pipe.

건조된 강관은 내부코팅 공정을 수행한다.The dried steel pipe performs an internal coating process.

즉, 내부코팅수단(80)은 가이드레일을 따라 이동하는 분사관이동수단(84)의 일측에 적어도 강관의 길이 이상의 길이는 갖는 도료분사관(82)을 설치하고 분사관의 단부에 적어도 2대 이상의 분사노즐(83)을 설치하여 분사되는 도료가 회전롤러의 구동에 의해 회전하는 강관의 내벽에 코팅되게 한다.That is, the inner coating means 80 is installed on the one side of the injection pipe moving means 84 moving along the guide rail, at least two lengths of the coating pipe 82 having a length of at least the length of the steel pipe and at least two at the end of the injection pipe The above-described spray nozzle 83 is installed so that the sprayed paint is coated on the inner wall of the rotating steel pipe by driving of the rotating roller.

즉, 다수의 분사노즐에서 일정하게 도료를 분사하되 이동수단이 일정한 속도로 이동하고 강관이 일정한 속도로 회전함에 따라 강관 내부에는 일정한 두께로 코팅이 이루어지는 것이다. That is, the coating is made to a certain thickness inside the steel pipe as the paint is constantly sprayed from a plurality of spray nozzles but the moving means moves at a constant speed and the steel pipe rotates at a constant speed.

10: 강관공급수단
11, 12: 가이드레일
13: 레일간격조절기 13s: 양방향볼트
13h: 회전손잡이
14: 강관이송기 14r: 이송롤러
14m: 구동수단 14c: 롤러각도조절기
15: 강관감지센서
16 키커
20: 외부쇼트기
21: 쇼트볼공급기 22: 임펠러
20p: 대기공간
30: 예열로 30h: 히터
30s: 스토퍼 30c: 실린더
C1: 회전캡장착부
30s: 회전축
40: 외부코팅장치 40c: 체인
41: FBE코팅탱크 41t: FBE탱크
41a: 에어블로워
42: 접착제코팅탱크 42t: 접착제탱크
42a: 에어블로워
43: PE코팅탱크 43t: PE탱크
43a: 에어블로워
C2: 회전캡분리부
50: 냉각/수세수단
51: 구동수단 52: 롤러
53: 분사노즐
60:내부블라스팅장치
61: 회전롤러 62: 단부하우징
63: 그리트분사기(임펠러) 64: 이동수단
65: 에어분사노즐 66: 제진기
70: 건조수단
80: 내부코팅수단
81: 회전롤러 82: 도료분사관
83: 분사노즐 84: 분사관이송수단
100: 강관
10: Steel pipe supply means
11, 12: Guide rail
13: Rail spacing regulator 13s: Bi-directional bolt
13h: rotating handle
14: steel pipe transfer machine 14r: transfer roller
14m: driving means 14c: roller angle adjuster
15: Steel pipe detection sensor
16 kickers
20: external shorter
21: short ball feeder 22: impeller
20p: Waiting space
30: preheating furnace 30h: heater
30s: stopper 30c: cylinder
C1: rotating cap mounting part
30s: rotating shaft
40: external coating device 40c: chain
41: FBE coating tank 41t: FBE tank
41a: Air blower
42: adhesive coating tank 42t: adhesive tank
42a: Air blower
43: PE coating tank 43t: PE tank
43a: Air blower
C2: rotating cap separator
50: cooling / washing means
51: driving means 52: roller
53: spray nozzle
60: internal blasting device
61: rotary roller 62: end housing
63: grit sprayer (impeller) 64: means of transportation
65: air injection nozzle 66: vibration damper
70: drying means
80: internal coating means
81: rotary roller 82: paint sprayer
83: spray nozzle 84: spray pipe conveying means
100: steel pipe

Claims (7)

레일간격조절기(13)에 의해 간격이 조절되는 평행하게 설치된 두 개의 가이드레일 (11, 12), 강관을 길이 방향으로 일정하게 이동시키는 다수의 이송롤러(14r)들 중 일부에는 구동수단(14m)을 설치하여 이송롤러를 구동시킴에 의해 강관을 길이 방향으로 이동시키는 강관이송기(14)와, 상기 가이드레일의 후단에 설치되어 강관을 감지하는 강관감지센서(15), 및 강관을 감지하면 강관이송기를 정지시키고 작동하여 강관을 일측으로 밀어 대기공간(20p)으로 이동시키는 키커(16)로 이루어진 강관공급라인(10);
상기 강관공급라인의 중단에 설치되어 통과하는 강관의 외부에 쇼트 그리트를 분사하여 외부의 이물질을 분리하는 외부쇼트기(20);
상기 강관공급라인을 통해 이송되어 배출된 강관을 가열하는 가열로(30);
가열된 강관의 양단에 각각 체일을 걸수 있도록 회전캡을 장착하는 회전캡장착부(C1);
FBE, 접착제 및 폴리에틸렌이 저장된 탱크가 순차적으로 설치되어 있으며, 각 탱크에 저장된 도료강관에 순차적으로 코팅되게 하는 외부코팅장치(40);
강관의 양단에 설치된 회전캡을 분리하는 회전캡분리부(C2);
구동수단의 구동에 의해 회전하는 강관의 내부에 고압의 물과 공기를 분사하여 코팅과정에서 강관의 내부에 묻은 물질을 제거하는 냉각/수세수단(50);
회전롤러(61)에 의해 회전하는 강관의 일측에 설치되어 강관의 내부로 이동하면서 그리트를 분사하는 그리트분사기(63)와, 상기 그리트분사기를 강관의 길이 방향으로 왕복이동시키는 이동수단(64)로 이루어진 내부블라스팅장치(60);
블라스팅된 강관의 내부에 열풍을 공급하여 습기를 제거하는 건조수단(70);
가이드레일을 따라 이동하는 분사관이동수단(84)의 일측에 적어도 강관의 길이 이상의 길이는 갖는 도료분사관(82)을 설치하고 분사관의 단부에 적어도 2대 이상의 분사노즐(83)을 설치하여 분사되는 도료가 회전롤러의 구동에 의해 회전하는 강관의 내벽에 코팅되게 하는 내부코팅수단(80)을 포함하여 이루어지며,
상기 강관이송기(14)는 회전하여 강관을 길이 방향으로 일정하게 이동시키는 다수의 이송롤러(14r); 다수의 이송롤러들 중 일부를 구동시키는 구동수단(14m); 및 일단은 가이드레일에 고정되고 타단은 이송롤러가 힌지 고정된 지지대에 힌지 결합되어 두 단부 사이의 거리를 조절함에 의해 이송롤러의 각도를 조절하여 이송롤러가 강관의 이송방향으로 토우인을 이루게 하는 롤러각도조절기(14c)로 이루어진 것을 특징으로 하는 3층PE 및 에폭시 코팅시스템.
Two guide rails (11, 12) installed in parallel to which the spacing is adjusted by the rail spacing controller (13), a driving means (14m) for some of the plurality of transport rollers (14r) for constantly moving the steel pipe in the longitudinal direction A steel pipe transporter (14) for moving the steel pipe in the longitudinal direction by driving a transport roller by installing a steel pipe detection sensor (15) installed at the rear end of the guide rail to detect the steel pipe, and when detecting the steel pipe A steel pipe supply line (10) made of a kicker (16) that stops and operates the transporter to move the steel pipe to one side and moves it to the waiting space (20p);
An external shorter 20 that is installed at the middle of the steel pipe supply line and sprays a short grit on the outside of the steel pipe passing therethrough to separate foreign substances from the outside;
A heating furnace 30 for heating the steel pipes transferred and discharged through the steel pipe supply line;
Rotating cap mounting portion (C1) for mounting a rotating cap to be attached to both ends of the heated steel pipe;
FBE, adhesive and polyethylene storage tank is sequentially installed, the outer coating device 40 to be sequentially coated on the coating steel pipe stored in each tank;
A rotating cap separating part (C2) separating the rotating caps installed at both ends of the steel pipe;
Cooling/washing means (50) for removing the substances on the inside of the steel pipe during the coating process by spraying high pressure water and air into the inside of the steel pipe rotating by the driving of the driving means;
It is installed on one side of the steel pipe that is rotated by the rotating roller (61) to the grit sprayer (63) for spraying the grit while moving into the inside of the steel pipe, and the moving means (64) for reciprocating the grit sprayer in the longitudinal direction of the steel pipe. An inner blasting device made of 60;
Drying means (70) for removing moisture by supplying hot air to the inside of the blasted steel pipe;
On one side of the injection pipe moving means 84 moving along the guide rail, a coating spray tube 82 having a length of at least the length of the steel pipe is installed, and at least two spray nozzles 83 are installed at the ends of the injection pipe. It comprises an internal coating means (80) to be coated on the inner wall of the steel pipe to be rotated by the paint to be sprayed is rotated by the drive of the rotary roller,
The steel pipe transporter 14 includes a plurality of transport rollers 14r that rotate and move the steel pipes constantly in the longitudinal direction; A driving means (14m) for driving a part of the plurality of transport rollers; And one end is fixed to the guide rail and the other end is hinged to a support on which the transport roller is hinged to adjust the angle of the transport roller by adjusting the distance between the two ends, thereby allowing the transport roller to form a toe-in in the transport direction of the steel pipe. 3 layer PE and epoxy coating system, characterized in that consisting of an angle controller (14c).
삭제delete 제1항에 있어서,
상기 레일간격조절기(13)는 두 개의 가이드레일을 수직으로 관통하여 설치되고 중앙을 중심으로 양측에 각각 반대방향으로 나사산이 형성된 양방향볼트(13s)와, 상기 양방향볼트를 회전시키는 회전손잡이(13h)로 구성된 것을 특징으로 하는 3층PE 및 에폭시 코팅시스템.
According to claim 1,
The rail spacing adjuster 13 is installed through two guide rails vertically and has bidirectional bolts 13s having threads formed in opposite directions on both sides of the center, and a rotating handle 13h for rotating the bidirectional bolts. 3 layer PE and epoxy coating system, characterized in that consisting of.
제1항에 있어서,
상기 외부쇼트기(20)는 강관(100)의 중심으로 등간격으로 배치되고, 쇼트볼을 공급하는 쇼트볼공급기(21)와, 쇼트볼공급기에 의해 공급된 쇼트볼을 고속으로 회전하는 회전날개로 타격하여 강관을 타격하는 임펠러(22)로 이루어진 것을 특징으로 하는 3층PE 및 에폭시 코팅시스템.
According to claim 1,
The external shorter 20 is disposed at equal intervals as the center of the steel pipe 100, and the short ball supplyer 21 for supplying the short ball, and a rotary blade for rotating the short ball supplied by the short ball supplyer at high speed. Three-layer PE and epoxy coating system, characterized in that consisting of an impeller (22) hitting the steel pipe by hitting with.
제1항에 있어서,
상기 외부코팅장치(40)는 FBE코팅탱크(41), 접착제코팅탱크(42) 및 PE코팅탱크(43)이 순차적으로 설치되고,
각각은 코팅 도료가 저장되는 도료탱크(41t, 42t, 43t)와, 도료탱크의 저면으로부터 공기를 불어넣어 도료들이 미분으로 부유하여 강관의 표면에 코팅되게 하는 에어블로워(41a~43a)로 이루어진 것을 특징으로 하는 3층PE 및 에폭시 코팅시스템.
According to claim 1,
The external coating device 40 is a FBE coating tank 41, an adhesive coating tank 42 and a PE coating tank 43 are sequentially installed,
Each consists of a paint tank (41t, 42t, 43t) in which the coating paint is stored, and air blowers (41a-43a) that blow air into the bottom surface of the paint tank to cause the paints to float on a fine powder to be coated on the surface of the steel pipe. Features 3-layer PE and epoxy coating system.
제1항에 있어서,
상기 내부블라스팅장치(60)는 그리드분사기의 후단에 에어분사노즐을 설치하여 공기커튼을 형성하는 것을 특징으로 하는 3층PE 및 에폭시 코팅시스템.
According to claim 1,
The inner blasting device 60 is a three-layer PE and epoxy coating system characterized in that the air injection nozzle is installed at the rear end of the grid sprayer to form an air curtain.
청구항 1 및 청구항 3 내지 6항 중 어느 한항의 3층PE 및 에폭시 코팅시스템을 이용하여 제조된 것을 특징으로 하는 코팅강관.A coated steel pipe characterized by being manufactured using the three-layer PE and epoxy coating system of any one of claims 1 and 3 to 6.
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