KR790001864B1 - Manufacturing method of synthetic resin lined steel pipe - Google Patents

Manufacturing method of synthetic resin lined steel pipe Download PDF

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Publication number
KR790001864B1
KR790001864B1 KR7802847A KR780002847A KR790001864B1 KR 790001864 B1 KR790001864 B1 KR 790001864B1 KR 7802847 A KR7802847 A KR 7802847A KR 780002847 A KR780002847 A KR 780002847A KR 790001864 B1 KR790001864 B1 KR 790001864B1
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South Korea
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pipe
pvc
pvc pipe
manufacturing
steel
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KR7802847A
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Korean (ko)
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김창곤
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김창곤
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Abstract

Manufg. of anti-corrosion double layer pipe and improving adhesion between steel and PVC pipe comprised the steps of (a) inserting PVC pipe which adhesive applied on outside into steel pipe which adhesive applied on inside (b) inserting long rubber tube into said pipe of which the one end was fixed at end of compressor nozzle (c) inserting steel core into said pipe from the opposite end(d) blowing air by compressor and pulling the steel core out while heating the outside steel pipe to 70-75OC to form pseudoplastic PVC.

Description

철파이프내에 합성수지 파이프를 밀착한 이중파이프 제조방법Manufacturing method of double pipe in which synthetic resin pipe is in close contact with iron pipe

제 1 도는 본 발명방법을 실시하는 과정을 표시한 단면도.1 is a cross-sectional view showing the process of carrying out the method of the present invention.

제 2 도는 제 1 도의 A-A'선 부분의 확대도.2 is an enlarged view of a portion A-A 'of FIG. 1;

제 3 도는 동 방법의 작용효과 설명도.3 is an explanatory diagram of the effect of the method.

제 4 도는 동 방법으로 제조한 이중파이프의 단면 확대도.4 is an enlarged cross-sectional view of a double pipe manufactured by the same method.

본 발명은 상수도 용이나 약품 유통용 철파이프의 내면이 산화부식하는 폐단을 방지하기 위하여 산화부식이 되지 아니하는 합성수지 파이프를 끼우되 그 접촉면을 완전히 밀착시킨 이중 파이프의 제조방법을 얻으려 하는 것이다.The present invention is to obtain a method of manufacturing a double pipe in which the inner surface of the iron pipe for water supply or chemical distribution is fitted with a synthetic resin pipe that is not oxidized to prevent oxidative corrosion.

산화부식을 받지않는 PVC 파이프를 철파이프 내에 끼우기란 용이한 것이나 그의 접착면을 밀착시키려면 보통 삽입방법으로는 그 목적을 달성할 수 없다.It is easy to insert PVC pipes which are not subjected to oxidizing corrosion into iron pipes, but in order to bring the adhesive surface thereof into close contact, its purpose cannot be achieved by the usual insertion method.

본 발명은 이러한 애로를 타개하는 수단으로 철파이프 내에 PVC파이프를 끼우고 PVC파이프를 의열 연화시킨 상태에서 내면 가압으로 PVC파이프를 확장시키어서 그 접촉면을 밀착시키며 그 접촉면에 미세한 공극이라도 잔류(殘留)하지 않토록하기 위하여 철파이프의 내면과 PVC파이프의 외면에 적당할 점성제나 접착제를 재개시키어 완전 밀착되는 효과를 가져오게 하는 방법으로서 첨부 도면에 의하여 이를 상세히 설명하면 다음과 같다.According to the present invention, the PVC pipe is inserted into the iron pipe as a means to break the bottle, and the PVC pipe is expanded by internal pressure while thermally softening the PVC pipe. In order not to be described in detail by the accompanying drawings as a method of bringing the effect of being completely in close contact by re-adhesive viscosity or adhesive suitable for the inner surface of the iron pipe and the outer surface of the PVC pipe.

철파이프(1)의 내면에 PVC파이프(2)(내산성 합성수지)를 끼우되 철파이프(1)의 내면과 이에 순조롭게 삽입될만한 크기의 PVC파이프(2)의 외면에 에폭시(epoxy)수지로된 강력수지와 접착제를 각각 도말하여 삽입하므로서 철파이프(1)과 PVC파이프(2) 사이의 공극에 접착제층(3)을 개재시킨 다음 제 1 도의 화살표 "가"들과 같이 철파이프(1)를 80-90℃로 25-30초간 가열하여 PVC파이프(2)를 70-75℃로 상승시키어서 의열 연화시킨 다음에 좌단의 콤푸렛사 노즐(4)에 유연탄력성(柔軟彈力性)고무 튜우브(5)의 좌단을 고정시키고 그 우단을 밀폐하여 공기가 유출되지 않게 장기낭(長期囊)으로 하여 심관(芯管)(6)에 삽입하여 심관(6)의 우단을 PVC파이프의 좌단으로 부터 삽입하고 콤프렛사에서 공기를 화살표 "나"와 같이 압입하여 PVC파이프(2)의 내면에 2kg/㎠정도의 압축 공기로서 외향확장작용을 시키는 것이다.Insert the PVC pipe (2) (acid-resistant synthetic resin) into the inner surface of the iron pipe (1), but use the epoxy resin on the inner surface of the iron pipe (1) and the outer surface of the PVC pipe (2) of a size that can be smoothly inserted into it. Resin and adhesive are respectively plated and inserted to interpose the adhesive layer 3 in the gap between the iron pipe 1 and the PVC pipe 2, and then the iron pipe 1 is inserted as shown by the arrow “ga” in FIG. After heating to -90 ° C for 25-30 seconds, the PVC pipe 2 was raised to 70-75 ° C and thermally softened. Then, the flexible rubber tubing (5) Fix the left end of the cuff) and seal the right end so that it does not leak air into the core tube (6). Insert the right end of the core tube (6) from the left end of the PVC pipe. Compress air from the compressor as arrow "I" and press compressed air of about 2kg / ㎠ to the inner surface of PVC pipe (2). It is to expand outward action.

이때 고무 튜우브(5)가 심관(6)내에 끼워있을 동안에는 확대되지 못하지만 심관(6)을 화살표 "다"와 같이 초속 10-15cm로 서서히 뽑으면 노즐(4)은 철파이프(1)의 좌단에 걸리어 고정되어 있고 심관(6)만이 우측으로 빠져나가는데 고무 튜우브(5)는 그 좌단이 노즐(4)에 고정되어 있으므로 심관(6)만이 빠져나간 자리에 남아있게 되며 그 순간에 압축공기의 압력으로 확대되면서 의열 연화된 PVC파이프(2)를 철파이프(1)의 내면에 강력히 가압하므로 미세한 공극도 남기지 않고 밀착되는데, 미리도 말한 접착제층(3)이 있어서 철파이프(1)의 내면의 극히 미세한 요철면이 접착제층(3)으로 메꾸어 지므로 기포가 형성될 우려도 없고 더욱이 심관(6)의 좌단이 PVC파이프(2)의 좌단에서 부터 차례차례로 강압을 가하게 되는 관계로 아직 가압되지 아니한 우측을 향하여 공기의 기포를 이 화살표 "라" "랴"와 같이 빠져나가고 기포는 형성되지 아니한다.At this time, the rubber tubing 5 cannot be enlarged while being inserted into the core 6, but when the core 6 is slowly pulled out at 10-15 cm per second as shown by the arrow "C", the nozzle 4 moves to the left end of the iron pipe 1. It is caught and fixed and only the core tube 6 exits to the right, but the rubber tubing 5 is fixed to the nozzle 4 so that only the core tube 6 remains in the position where the core tube 6 exits. The thermally softened PVC pipe (2) is strongly pressed against the inner surface of the iron pipe (1) while being expanded by pressure, and thus close contact is made without leaving any fine pores, and the adhesive layer (3) mentioned above has an adhesive layer (3) of the inner surface of the iron pipe (1). Since the very fine concavo-convex surface is filled with the adhesive layer 3, there is no fear of bubbles being formed, and furthermore, the left end of the core pipe 6 is sequentially pressed from the left end of the PVC pipe 2 so that the right side that has not been pressed yet. Towards the air The bubble is arrow "La" passing through, such as "Caesarea" bubbles shall not be formed.

따라서 심관(6)을 우단으로 완전히 빼낸 다음에 약 10초 동안 압축 공기를 밀폐하였다가 철파이프(1)의 내면에 PVC파이프가 꽉차게 확장된 다음에 압축 공기를 노즐(4)측으로 빼어 튜우브(5)가 원자세로 축소되게 하여서 빼낸다.Therefore, the core pipe 6 is completely pulled out to the right end, and the compressed air is sealed for about 10 seconds. Then, the PVC pipe is fully expanded on the inner surface of the iron pipe 1, and then the compressed air is pulled out to the nozzle 4 side. Remove (5) by reducing it to atomic force.

만일에 이와같이 고무 튜우브(5)를 PVC에 끼우지 않고 압축 공기만을 주입하면 철파이프(1)의 내면에 요철면이 있는 경우에는 제 3 도의 "마"부분과 같은 요철면이 형성될 것이므로 고무 튜우브(5)로된 장기낭을 사용하며 장기낭 전체에 압축 공기를 주입하면 기낭 전체가 동시에 확대되어 철파이프(1)와 합성수지 파이프(2)사이에 기포가 생기어 완전히 밀착된 이중파이프를 얻을 수 없다.If only the compressed air is injected without inserting the rubber tubing 5 into the PVC in this way, if there is an uneven surface on the inner surface of the iron pipe 1, the uneven surface such as the "e" part of FIG. 3 will be formed. Using the organ bag made of the woofer (5), and when compressed air is injected into the organ bag, the entire air bladder is enlarged at the same time to create a bubble between the iron pipe (1) and the synthetic pipe (2) to obtain a fully sealed double pipe. Can't.

본 발명 방법을 이점에도 주력하여 심관(6)에 장기낭을 넣어놓고 좌단에서부터 고무 튜우브(5)를 점진적으로 확대시키어 급기야는 우단까지 진행시키는 방법을 취하므로서 기포를 잔존시키지 않고 엄밀히 밀착시킬 수 있는 방법을 구성한 것이며 이러한 요철면에 미세한 공극이 형성되지 아니하도록 접착체층(3)을 이에 개재시키므로서 밀착 상태를 이루게 하는 것이다.Focusing on the method of the present invention, the organ tube is placed in the core tube 6 and the rubber tube 5 is gradually enlarged from the left end to proceed to the right end, so that air bubbles can be closely adhered without remaining bubbles. In this way, the adhesive layer 3 is interposed therebetween so that fine pores are not formed on the uneven surface.

본 발명 방법은 상수도 파이프와 같은 세장관이나 또는 굵고 길이가 짧은 관체등에도 적용할 수 있는 방법이며 PVC파이프의 두께는 외곽의 철파이프의 두께의 삼분의 일 정도로하며 이와 같이하여 얻어진 이중파이프는 상수도관이나 황산염산 등의 산류 또는 알카리류 동 액체나 가스 파이프로 널리 사용하여도 내외면에 산화부식 될 우려가 없으며 보열성도 양호한 유용한 이중파이프이다.The method of the present invention can be applied to thin pipes such as tap water pipes, or thick and short pipes, and the thickness of the PVC pipe is about one third of the thickness of the outer steel pipe. Even if it is widely used as acid or alkali copper liquid or gas pipe such as pipe, sulfate, etc., there is no risk of oxidizing corrosion on the inside and outside surfaces, and it is a useful double pipe with good heat retention.

Claims (1)

본문에 상술하고 도면에 예시함과 같이 철파이프(1)내면과 PVC파이프(2)의 외면에 접착제를 도말 삽입하여 이중파이프로 하고 좌단을 콤프렛사의 노즐(4)에 연결한 고무 튜우브(5)로된 장기낭을 심관(6)에 넣어 PVC파이프(2)내에 끼우고 철파이프(1)를 가열하여 합성수지 파이프(2)가 의열 연화된 상태에서 콤푸렛사에서 고압의 압축 공기를 주입하면서 심관(6)을 우단으로 서서히 뽑아주므로서 고무 튜우브(5)가 좌단에서 부터 차례로 확대되면서 의열 연화된 PVC파이프(2)를 점진적으로 좌측에서 우측으로 나가면서 밀착시켜 주게하는 것을 특징으로 하는 철파이프 내에 PVC파이프를 밀착한 이중파이프 제조방법.As described above in the text and illustrated in the drawings, a rubber tube is formed by inserting an adhesive on the inner surface of the iron pipe 1 and the outer surface of the PVC pipe 2 to form a double pipe, and connecting the left end to the nozzle 4 of the compressor. 5) Insert the organ bladder into the core pipe 6 into the PVC pipe 2 and heat the iron pipe 1 to inject high-pressure compressed air from the compressor yarn while the synthetic pipe 2 is heated and softened. While the core tube 6 is gradually drawn out to the right end, the rubber tubing 5 expands from the left end in turn, thereby gradually heating the softened PVC pipe 2 gradually from the left to the right to be in close contact. Double pipe manufacturing method in which the PVC pipe is in close contact with the pipe.
KR7802847A 1978-09-19 1978-09-19 Manufacturing method of synthetic resin lined steel pipe KR790001864B1 (en)

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KR7802847A KR790001864B1 (en) 1978-09-19 1978-09-19 Manufacturing method of synthetic resin lined steel pipe

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