KR100929929B1 - Method for manufacturing union coupling used in flameproof electric wire piping - Google Patents

Method for manufacturing union coupling used in flameproof electric wire piping Download PDF

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KR100929929B1
KR100929929B1 KR1020090043408A KR20090043408A KR100929929B1 KR 100929929 B1 KR100929929 B1 KR 100929929B1 KR 1020090043408 A KR1020090043408 A KR 1020090043408A KR 20090043408 A KR20090043408 A KR 20090043408A KR 100929929 B1 KR100929929 B1 KR 100929929B1
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South Korea
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union coupling
components
union
explosion
manufacturing
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KR1020090043408A
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Korean (ko)
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전승록
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통일방폭전기 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/04—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts using additional rigid rings, sealing directly on at least one pipe end, which is flared either before or during the making of the connection
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
    • C25D11/10—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing organic acids
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated

Abstract

PURPOSE: A method for manufacturing light union coupling for a flameproof wire is provided to improve corrosion resistance and abrasion resistance by anodizing the aluminum alloy components. CONSTITUTION: Components(102,106) of union coupling(100) are made by extruding and cutting the aluminum alloy material. The foreign material is removed from the surface of components by the acid cleaning. A temperature of an electrolyte for the surface process of the components is maintained between 4 and 5 degrees below zero. The electrolyte contains the water and organic acid with a ratio of 6:4. The components are anodized in the electrolyte for 60 to 80 minutes under the voltage of 50 to 60V and the current of 2000A. The components are cleaned, dried, and assembled.

Description

방폭전선배관용 유니언 커플링의 제조방법{Method for manufacturing union coupling used in flameproof electric wire piping}Method for manufacturing union coupling used in flameproof electric wire piping}

본 발명은 방폭전선배관용 유니언 커플링의 제조방법에 관한 것으로서, 보다 상세하게는 유니언 커플링을 알루미늄 합금으로 제작하고, 그 표면을 아노다이징 표면처리를 실시함으로써 내마모성이 우수하고 부식을 방지할 수 있도록 한 방폭전선배관용 유니언 커플링의 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a union coupling for explosion-proof wire piping, and more particularly, to manufacture a union coupling made of aluminum alloy, and anodizing the surface of the union coupling to provide excellent wear resistance and prevent corrosion. It relates to a method for producing a union coupling for explosion-proof wire piping.

일반적으로 위험물을 취급하는 지역에 건설되는 건물이나 일반 산업지역에 건설되는 공장 플랜트 등의 시설에는 여러가지 전선관 등을 위한 배관설비가 되어 있으며, 이러한 배관설비의 작업에는 각종 배관용 부품이 사용되고 있다.In general, facilities such as buildings constructed in areas handling dangerous goods or factory plants constructed in general industrial areas have piping facilities for various conduits, and various plumbing parts are used for the operation of such piping facilities.

특히, 석유나 화학물질 등의 폭발의 위험성이 있는 위험물, 즉 가스 등의 위험물을 취급하는 지역에 건설되는 건물 등의 배관설비에는 각종 화기로 인한 폭발사고를 예방하기 위하여 엄격한 준수사항을 정하여 시행하고 있을 뿐만 아니라 안전사고를 방지하기 위해 전선관 등을 위한 배관 연결에는 방폭전선배관용 유니언 커플링이 사용되고 있다.In particular, plumbing facilities, such as buildings that are constructed in areas that handle dangerous goods such as petroleum or chemicals, such as gas, which are hazardous to explosions, must be strictly enforced to prevent explosions caused by various fires. In addition, the union coupling for explosion-proof wire piping is used for the pipe connection for conduit, etc. to prevent safety accidents.

이와 같이 사용되고 있는 방폭전선배관용 유니언 커플링(100)은 첨부한 도 1 및 도 2에 도시된 바와 같이, 숫나사형의 유니언 나사(102)와 유니언 너트(106), 그리고 숫나사형 유니언 나사(102)와 유니언 너트(106) 사이에 내재되는 유니언 소켓(104)으로 구성되어 있으며, 여러가지 형태의 전선관 등을 서로 배관 연결하여 체결할 때 사용하는 부품이다.The union coupling 100 for explosion-proof wire piping used as described above is shown in FIG. 1 and FIG. 2, male union 102 and union nut 106, and male union screw 102. And the union socket 104 embedded between the union nut 106 and the components used when connecting various types of conduits and the like to each other for pipe connection.

그런데 종래의 방폭전선배관용 유니언 커플링은 그 재질이 주철(Cast iron) 등의 철합금으로 제작됨에 따라 그 무게가 무거워서 운반 및 조립 작업에 어려움이 있을 뿐만 아니라 특히 부식에 약하여 표면에 녹이 슬게 되어 쉽게 마모되므로 제품의 수명이 짧게 되는 문제점이 있다.However, the conventional union coupling for explosion-proof wire piping is made of iron alloys such as cast iron, so that its weight is heavy, which makes it difficult to transport and assemble, and it is particularly vulnerable to corrosion, which makes it easy to rust on the surface. There is a problem that the life of the product is shortened because it is worn.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출한 것으로서, 방폭전선배관용 유니언 커플링의 부품을 알루미늄 합금 소재를 이용하여 제작함에 따라 경량화를 도모할 수 있고, 특히 알루미늄 합금으로 제작된 부품의 표면을 소정의 조건으로 아노다이징 표면처리를 실시하여 내마모성이 우수하고 부식을 방지할 수 있도록 한 방폭전선배관용 유니언 커플링의 제조방법을 제공하는데 그 목적이 있다.The present invention has been made in order to solve the above problems, it is possible to reduce the weight by manufacturing the parts of the union coupling for explosion-proof wire piping using aluminum alloy material, in particular the surface of the parts made of aluminum alloy It is an object of the present invention to provide a method for producing a union coupling for explosion-proof wire piping that is excellent in wear resistance and prevents corrosion by performing anodizing surface treatment under predetermined conditions.

상기한 목적을 달성하기 위한 본 발명은 알루미늄 합금 소재를 압출한 후 소정 길이로 절단하여 기계가공에 의해 소정 형상의 유니언 커플링의 부품인 나사와 소켓 및 너트를 제작하는 단계와; 상기 제작된 유니언 커플링의 부품들을 산수세 처리하여 표면의 이물질을 제거하는 단계와; 상기 유니언 커플링의 부품들을 표면처리 하기 위해 물과 유기산을 6:4 비율로 혼합시킨 전해액의 온도를 냉동기의 작동으로 영하 4~5℃로 유지하는 단계와; 상기 전해액 내에 산수세 처리로 이물질이 제거된 상기 유니언 커플링의 부품들을 넣고 2000A의 전류 및 50~60V의 전압 조건으로 1시간~1시간 20분 동안 전해하여 양극산화를 실시하는 단계와; 상기 양극산화된 유니언 커플링의 부품들을 수세 및 건조 조립하는 단계;로 이루어지는 것을 특징으로 하는 방폭전선배관용 유니언 커플링의 제조방법을 제공한다.The present invention for achieving the above object comprises the steps of extruding an aluminum alloy material and cutting to a predetermined length to produce screws, sockets and nuts which are parts of the union coupling of a predetermined shape by machining; Removing the foreign matter on the surface by acid-washing the manufactured components of the union coupling; Maintaining the temperature of the electrolyte solution in which the water and the organic acid are mixed at a 6: 4 ratio in the ratio of 4 to 5 ° C. by the operation of the refrigerator to surface treat the components of the union coupling; Putting the components of the union coupling in which the foreign matter was removed by the acid wash treatment, and performing anodization for 1 hour to 1 hour and 20 minutes under a current of 2000 A and a voltage of 50 to 60 V; Washing and dry assembling the components of the anodized union coupling provides a method for manufacturing a union coupling for explosion-proof wire piping.

본 발명에서 상기 전압 조건은 최초 20V를 시작으로 제공하여 10분 간격마다 10V씩 승압되게 하며, 50~60V까지 타이머에 의한 자동승압이 이루어지도록 한 것을 특징으로 한다.In the present invention, the voltage condition is provided by starting the first 20V by 10V every 10 minutes intervals, it characterized in that the automatic boost by the timer to 50 ~ 60V.

또한, 상기 알루미늄 합금 소재는 알루미늄 합금 6063, 6061, 5052 중 선택된 어느 하나인 것을 특징으로 한다.In addition, the aluminum alloy material is characterized in that any one selected from aluminum alloy 6063, 6061, 5052.

본 발명은 상기한 과제 해결 수단을 통하여 다음과 같은 효과를 제공한다.The present invention provides the following effects through the problem solving means described above.

본 발명에 따르면, 방폭전선배관용 유니언 커플링은 그 부품을 알루미늄 합 금을 이용하여 제작함에 따라 경량화를 도모할 수 있으며, 특히 알루미늄 합금 소재로 제작된 유니언 커플링의 부품들의 표면을 소정의 조건에서 아노다이징 표면처리를 실시함으로써 종래의 주철제품에 비하여 향상된 내마모성 및 내부식성을 제공할 수 있다.According to the present invention, the union coupling for explosion-proof wire piping can be reduced in weight by manufacturing the components using aluminum alloy, and in particular, the surface of the components of the union coupling made of aluminum alloy material under certain conditions. By performing anodizing surface treatment, it is possible to provide improved abrasion resistance and corrosion resistance as compared with conventional cast iron products.

이하, 본 발명에 따른 방폭전선배관용 유니언 커플링의 제조방법을 설명하기로 한다.Hereinafter, a method for manufacturing a union coupling for explosion-proof wire piping according to the present invention will be described.

일반적으로 금속 표면에 변환층을 형성하는데는 두가지 방법이 이용되고 있는데, 첫째는 화학적 또는 전기화학적으로 금속 표면에 산화층을 형성하는 방법이 있고, 둘째는 알루미늄 표면의 화학적 처리방법으로는 크로메이트(chromating)처리나 베마이트(boehmite)처리가 있으며, 이는 전기를 걸어주지 않은 상태에서 화학적인 방법으로 알루미늄 표면에 산화층을 형성한다.Generally, two methods are used to form a conversion layer on a metal surface. First, an oxide layer is formed on a metal surface chemically or electrochemically. Second, a chemical treatment method on an aluminum surface is chromate. There are treatments and boehmite treatments, which form an oxide layer on the aluminum surface in a chemical way without electricity.

그러나, 이러한 화학적인 표면처리 방법은 산화층 피막이 얇거나 내마모성이 떨어지기 때문에 응용범위의 제한이 있고, 이에 비해 전기화학적인 방법인 아노다이징(anodizing: 양극산화처리법 또는 알루마이트)은 주로 황산용액을 전해액으로 사용하여 알루미늄의 표면에 전기화학적으로 양극산화피막을 형성시켜 기계적, 전기적, 화학적 특성이 우수한 피막을 형성할 수 있다.However, this chemical surface treatment method has a limited application range because the oxide layer coating is thin or wear resistance is low, whereas anodizing, anodizing or anodizing, which is an electrochemical method, mainly uses sulfuric acid solution as an electrolyte. By forming an anodized film electrochemically on the surface of aluminum, it is possible to form a film having excellent mechanical, electrical and chemical properties.

본 발명에 따르면, 이러한 아노다이징 공정에 대한 조건을 한정하여 방폭전선배관용 유니언 커플링의 부품의 하드 경질화를 달성할 수 있고, 우수한 내마모성 및 내부식성을 제공할 수 있다.According to the present invention, by hardening the components of the union coupling for explosion-proof wire piping by limiting the conditions for the anodizing process, it is possible to provide excellent wear resistance and corrosion resistance.

여기서, 본 발명의 방폭전선배관용 유니언 커플링의 제조방법을 순서대로 설명하면 다음과 같다.Here, the manufacturing method of the union coupling for explosion-proof wire piping of the present invention will be described in order.

첨부한 도 3은 본 발명에 따른 방폭전선배관용 유니언 커플링의 제조방법을 설명하는 공정도이다.FIG. 3 is a flowchart illustrating a method of manufacturing a union coupling for explosion-proof wire piping according to the present invention.

먼저, 알루미늄 합금 소재, 바람직하게는 알루미늄 합금 6063, 6061, 5052 중 선택된 어느 하나의 소재를 압출한 후 소정의 유니언 커플링의 부품들을 제작할 수 있는 길이로 절단한다.First, an aluminum alloy material, preferably any one selected from aluminum alloy 6063, 6061, 5052 is extruded, and then cut into a length capable of manufacturing parts of a predetermined union coupling.

이어서, 절단된 알루미늄 합금 압출 소재를 기계가공에 의해 소정 형상의 유니언 커플링(100)의 부품인 유니언 나사(102)와 유니언 소켓(104) 및 유니언 너트(106)를 제작한다.Subsequently, the cut aluminum alloy extruded material is machined to produce a union screw 102, a union socket 104, and a union nut 106, which are parts of the union coupling 100 having a predetermined shape.

이렇게 유니언 커플링의 부품들을 종래의 주철재 등으로 제작하지 않고, 알루미늄으로 제작하여 그 무게를 경량화할 수 있으며, 여러가지 전선관 등의 배관 조립 작업시 유니언 커플링을 다루기가 용이하여 작업성을 향상시킬 수 있다.Thus, the parts of the union coupling can be made of aluminum without being made of conventional cast iron, etc., and the weight can be reduced, and it is easy to handle the union coupling when piping assembling various conduits. Can be.

다음으로, 상기 유니언 커플링의 부품들을 질산 용액과 같은 산수세 용액을 이용하여 산수세 처리하여 부품들의 표면의 이물질을 제거한다.Next, the components of the union coupling is treated with a pickling solution such as a nitric acid solution to remove foreign substances on the surface of the parts.

이어서, 산수세 처리로 이물질이 제거된 알루미늄 유니언 커플링의 부품들을 알루미늄 하드 경질화, 즉 아노다이징 표면처리를 하게 되며, 아노다이징 표면처리를 하는 전해액의 온도는 냉동기의 작동으로 영하 4~5℃로 유지시킨다.Subsequently, the parts of the aluminum union coupling from which the foreign matter has been removed by pickling are subjected to aluminum hard hardening, that is, anodizing surface treatment, and the temperature of the electrolytic solution for the anodizing surface treatment is maintained at minus 4-5 ° C. by the operation of the freezer. Let's do it.

여기에서 전해액의 온도를 영하 4~5℃로 유지시키는 이유는 전해액의 온도를 이 온도로 유지하여야만 알루미늄 재질인 유니언 커플링의 부품들의 표면에 최상의 산화물 피막이 형성되어지며 그 산화물 피막에 의해 경도와 내마모성 및 내부식성을 향상시킬 수 있기 때문이다. The reason why the temperature of the electrolyte is maintained at minus 4 to 5 ° C is because the temperature of the electrolyte must be maintained at this temperature so that the best oxide film is formed on the surface of the components of the union of aluminum, and the hardness and wear resistance And corrosion resistance can be improved.

이때, 유니언 커플링의 부품들의 표면처리를 위한 전해액은 물과 유기산을 6:4 비율로 혼합시킨 것으로 구비하여 전해액조 내에 전해액을 충전시킨다.At this time, the electrolyte for the surface treatment of the components of the union coupling is provided with a mixture of water and organic acids in a 6: 4 ratio to fill the electrolyte in the electrolyte tank.

이에, 전해액 내에 산수세 처리로 이물질이 제거된 방폭전선배관용 유니언 커플링의 부품들을 넣고, 2000A의 전류 및 50~60V의 전압 조건으로 1시간~1시간 20분 동안 전해하여 양극산화를 실시하게 된다.Accordingly, the components of the union coupling for explosion-proof wire piping, in which the foreign matter is removed by the acid wash treatment, are put into the electrolyte and subjected to anodization for 1 hour to 1 hour and 20 minutes under a current of 2000 A and a voltage of 50 to 60 V. .

여기에서 2000A의 전류 및 50~60V의 전압 조건으로 1시간~1시간 20분 동안 실시하는 이유는 알루미늄 재질인 유니언 커플링의 부품들의 표면에 대한 양극산화가 최상의 수준으로 얻어지기 때문이다.The reason why it is carried out for 1 hour to 1 hour and 20 minutes under the current of 2000A and the voltage of 50 ~ 60V is because the anodization of the surface of the components of the aluminum coupling union coupling is obtained at the best level.

상기 전압 조건은 보다 상세하게 설명하면 전원을 공급하는 파워 서플라이(power supply)를 이용하여 최초 20V로 시작하여 제공하고, 10분 간격마다 10V씩 승압하여 50~60V까지 타이머에 의한 자동승압이 이루어지도록 한다.The voltage condition is described in more detail by using a power supply for supplying power, starting with the first 20V, and boosting by 10V every 10 minutes so that the auto-up is performed by a timer up to 50-60V. do.

이때, 알루미늄 재질인 방폭전선배관용 유니언 커플링의 부품들이 전해액에 담구어진 상태에서 양극산화를 실시할 때, 알루미늄 재질인 유니언 커플링의 부품들은 애노드(anode)측이 되고, 전해액조는 캐소드(cathod)측이 된다.At this time, when the components of the union coupling for explosion-proof wire piping made of aluminum are anodized in the state of being immersed in the electrolyte, the components of the union of the aluminum material become the anode side, and the electrolyte tank is the cathode. It becomes the side.

이와 같은 아노다이징 즉, 양극산화를 실시한 후 알루미늄 재질인 유니언 커플링의 부품들에 대한 수세 및 건조, 그리고 여러개로 나누어진 부품들을 하나로 조립하여 유니언 커플링으로 제품화시킨다.After anodizing, that is, anodizing, the components of the aluminum coupling of the union coupling are washed with water, dried, and assembled into several components into a union coupling.

이하, 다음의 실시예에 의거 본 발명을 더욱 상세히 설명하는 바, 본 발명이 다음의 실시예로 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail based on the following examples, but the present invention is not limited to the following examples.

실시예Example

알루미늄 합금 6063을 이용하여 압출된 소재를 기계가공에 의해 유니언 커플링의 부품인 나사와 소켓 및 너트를 제작하고, 상기 제작된 유니언 커플링의 부품들을 산수세 처리하여 이물질을 제거한 다음, 영하 5℃의 분위기하의 전해액 내에 산수세 처리로 이물질이 제거된 유니언 커플링의 부품들을 넣은 후 2000A의 전류 및 60V의 전압 조건으로 1시간 동안 전해하여 양극산화를 실시하고, 양극산화를 실시한 유니언 커플링의 부품들을 수세 및 건조하여 조립하였다.Machined extruded material using aluminum alloy 6063 to manufacture screws, sockets and nuts, which are parts of the union coupling, and removes foreign substances by pickling the components of the produced union coupling, and then remove the foreign matter. The components of the union coupling in which the foreign matter was removed by the pickling treatment in the electrolytic solution under the atmosphere of 1 ° C were electrolyzed for 1 hour under the conditions of a current of 2000A and the voltage of 60V for anodization, and the components of the union coupling which were anodized. They were assembled by washing with water and drying.

본 발명에서 실시예에 따른 방폭전선배관용 유니언 커플링은 종래의 주철재 방폭전선배관용 유니언 커플링에 비하여 그 무게를 경량화할 수 있으며, 경도와 내마모성 및 내부식성 등의 기계적 특성을 향상시킬 수 있음을 알 수 있었다.In the present invention, the union coupling for explosion-proof wire piping according to the embodiment can reduce the weight of the union coupling for explosion-proof wire piping for the conventional cast iron material, it is possible to improve the mechanical properties such as hardness and wear resistance and corrosion resistance Could know.

상술한 바와 같이, 본 발명은 바람직한 실시예를 참조하여 설명하였지만, 당해 기술분야의 통상의 지식을 가진자는 특허청구범위에 기재된 발명의 기술적 사상을 벗어나지 않는 범위 내에서 본 발명을 다양하게 변형하여 실시할 수 있는 것이다.As described above, the present invention has been described with reference to a preferred embodiment, but those skilled in the art will be practiced by various modifications of the present invention without departing from the technical spirit of the invention described in the claims. You can do it.

도 1은 방폭전선배관용 유니언 커플링을 보여주는 사진.1 is a photograph showing a union coupling for explosion-proof wire piping.

도 2는 방폭전선배관용 유니언 커플링의 부품을 보여주는 사진.Figure 2 is a photograph showing a part of the union coupling for explosion-proof wire piping.

도 3은 본 발명에 따른 방폭전선배관용 유니언 커플링의 제조방법을 설명하는 공정도.Figure 3 is a process diagram illustrating a method for manufacturing a union coupling for explosion-proof wire piping according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

100 : 방폭전선배관용 유니언 커플링 102 : 유니언 나사100: Union coupling for explosion-proof wire piping 102: Union screw

104 : 유니언 소켓 106 : 유니언 너트104: union socket 106: union nut

Claims (3)

알루미늄 합금 소재를 압출한 후 소정 길이로 절단하여 기계가공에 의해 소정 형상의 유니언 커플링의 부품인 나사와 소켓 및 너트를 제작하는 단계와;Extruding an aluminum alloy material and cutting it to a predetermined length to produce a screw, a socket and a nut which are parts of a union coupling of a predetermined shape by machining; 상기 제작된 유니언 커플링의 부품들을 산수세 처리하여 표면의 이물질을 제거하는 단계와;Removing the foreign matter on the surface by acid-washing the manufactured components of the union coupling; 상기 유니언 커플링의 부품들을 표면처리 하기 위해 물과 유기산을 6:4 비율로 혼합시킨 전해액의 온도를 냉동기의 작동으로 영하 4~5℃로 유지하는 단계와;Maintaining the temperature of the electrolyte solution in which the water and the organic acid are mixed at a 6: 4 ratio in the ratio of 4 to 5 ° C. by the operation of the refrigerator to surface treat the components of the union coupling; 상기 전해액 내에 산수세 처리로 이물질이 제거된 상기 유니언 커플링의 부품들을 넣고 2000A의 전류 및 50~60V의 전압 조건으로 1시간~1시간 20분 동안 전해하여 양극산화를 실시하는 단계와;Putting the components of the union coupling in which the foreign matter was removed by the acid wash treatment, and performing anodization for 1 hour to 1 hour and 20 minutes under a current of 2000 A and a voltage of 50 to 60 V; 상기 양극산화된 유니언 커플링의 부품들을 수세 및 건조 조립하는 단계;로 이루어지는 것을 특징으로 하는 방폭전선배관용 유니언 커플링의 제조방법.Washing and dry assembling the components of the anodized union coupling; Method for manufacturing a union coupling for explosion-proof wire piping, characterized in that consisting of. 청구항 1에 있어서,The method according to claim 1, 상기 전압 조건은 최초 20V를 시작으로 하여 10분 간격마다 10V씩 승압되어 50~60V까지 되도록 타이머에 의한 자동승압이 이루어지도록 한 것을 특징으로 하는 방폭전선배관용 유니언 커플링의 제조방법.The voltage condition is a method of manufacturing a union coupling for explosion-proof wire piping, characterized in that the automatic step-up by a timer so that up to 50 ~ 60V stepped up by 10V every 10 minutes starting from the first 20V. 청구항 1에 있어서, The method according to claim 1, 상기 알루미늄 합금 소재는 알루미늄 합금 6063, 6061, 5052 중 선택된 어느 하나인 것을 특징으로 하는 방폭전선배관용 유니언 커플링의 제조방법.The aluminum alloy material is a manufacturing method of the union coupling for explosion-proof wire piping, characterized in that any one selected from aluminum alloy 6063, 6061, 5052.
KR1020090043408A 2009-05-19 2009-05-19 Method for manufacturing union coupling used in flameproof electric wire piping KR100929929B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101477402B1 (en) * 2013-07-04 2014-12-29 양중근 Manufacturing method of coupling for refrigerant pipe
KR102186636B1 (en) * 2020-04-14 2020-12-03 일신산업전기 주식회사 Union coupling for explosion proof piping
KR20230039184A (en) * 2021-09-14 2023-03-21 김진수 Method extract and retract air Conditioner pipe, new cable, pipe lagging in underground
KR102586506B1 (en) * 2023-03-24 2023-10-10 (주)엔씨테크 Al heating chain clamp

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JPH0762595A (en) * 1993-08-30 1995-03-07 Natl Inst For Res In Inorg Mater Laminated film of aluminum oxide formed by anodization of aluminum and its production
JPH08260198A (en) * 1995-03-24 1996-10-08 Honda Motor Co Ltd Surface treating method of aluminum material
KR20030091924A (en) * 2003-11-17 2003-12-03 이현식 The manufacturing method of door knob
JP2005290559A (en) * 2004-04-01 2005-10-20 Wilson Greatbatch Technologies Inc Anodizing electrolyte for high voltage capacitor anode

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0762595A (en) * 1993-08-30 1995-03-07 Natl Inst For Res In Inorg Mater Laminated film of aluminum oxide formed by anodization of aluminum and its production
JPH08260198A (en) * 1995-03-24 1996-10-08 Honda Motor Co Ltd Surface treating method of aluminum material
KR20030091924A (en) * 2003-11-17 2003-12-03 이현식 The manufacturing method of door knob
JP2005290559A (en) * 2004-04-01 2005-10-20 Wilson Greatbatch Technologies Inc Anodizing electrolyte for high voltage capacitor anode

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101477402B1 (en) * 2013-07-04 2014-12-29 양중근 Manufacturing method of coupling for refrigerant pipe
KR102186636B1 (en) * 2020-04-14 2020-12-03 일신산업전기 주식회사 Union coupling for explosion proof piping
KR20230039184A (en) * 2021-09-14 2023-03-21 김진수 Method extract and retract air Conditioner pipe, new cable, pipe lagging in underground
KR102598397B1 (en) 2021-09-14 2023-11-03 김진수 Method extract and retract air Conditioner pipe, new cable, pipe lagging in underground
KR102586506B1 (en) * 2023-03-24 2023-10-10 (주)엔씨테크 Al heating chain clamp

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