KR20050031530A - a - Google Patents

a Download PDF

Info

Publication number
KR20050031530A
KR20050031530A KR1020030067697A KR20030067697A KR20050031530A KR 20050031530 A KR20050031530 A KR 20050031530A KR 1020030067697 A KR1020030067697 A KR 1020030067697A KR 20030067697 A KR20030067697 A KR 20030067697A KR 20050031530 A KR20050031530 A KR 20050031530A
Authority
KR
South Korea
Prior art keywords
synthetic resin
watertight
resin pipe
connector
sides
Prior art date
Application number
KR1020030067697A
Other languages
Korean (ko)
Inventor
장시성
Original Assignee
(주)장성산업
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)장성산업 filed Critical (주)장성산업
Priority to KR1020030067697A priority Critical patent/KR20050031530A/en
Publication of KR20050031530A publication Critical patent/KR20050031530A/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/02Sealings between relatively-stationary surfaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/06Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • F16L47/12Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with additional locking means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Abstract

Connection structure of a synthetic resin pipe connection unit is provided to make watertight members keep watertightness of synthetic pipes by forming watertight member installation grooves in divided connection units, inserting the watertight members in the watertight member installation grooves, and tightening bolts and nuts. In connection structure of a synthetic resin pipe connection unit(1), the synthetic resin pipe connection unit is divided into at least two equal parts of an upper connection unit(3) and a lower connection unit(3'). Watertight member installation grooves are formed in guide parts formed to both sides of the upper and lower connection units symmetrically formed, to fix watertight members(9,9'). Overlap protrusion parts and overlap parts are formed at each different position to one-sides of the watertight member installation grooves. Fastening protrusion parts(4,4') are protruded to the sides of the upper and lower connection units, and the upper and lower connection units connect synthetic resin pipes(2).

Description

합성수지관 연결구의 연결구조{a}Connection structure of synthetic pipe connector {a}

본 발명은 수도관, 하수관, 오수관과 같은 다양한 합성수지관이 수밀을 유지하면서 간편하게 조립되도록 하는 것으로, 더욱 상세하게는 연결구를 이등분하여 중앙에 설치홈을 형성하여 수밀부재를 삽입하고 양측으로 겹침 돌출부와 겹침부를 형성하여 양측에서 볼트와 너트로 고정시켜도 수밀이 보장되면서 간편하게 조립할 수 있도록 하는 합성수지관 연결구의 연결구조에 관한 것이다.The present invention is to easily assemble a variety of synthetic resin pipes such as water pipes, sewage pipes, sewage pipes while maintaining watertightness, more specifically, to form an installation groove in the center by bisecting the connector to insert a watertight member and overlap the overlapping protrusions on both sides The present invention relates to a connection structure of a synthetic resin pipe connector that can be easily assembled while forming a part to be secured with bolts and nuts at both sides.

일반적으로 합성수지관은 다양한 구경을 압출방식이나 와인더에 프로파일을 나사식으로 공급하면서 성형하게 된다.In general, a synthetic resin tube is formed by feeding a variety of diameters by screwing the profile to an extrusion method or a winder.

상기 합성수지관은 주로 6미터의 길이로 생산되어 지하에 매설되어 액체를 수송할 수 있도록 하는 용도로 사용된다.The synthetic resin pipe is mainly used to produce a length of 6 meters buried underground to transport the liquid.

그러나 합성수지관을 연결함에 있어서 수밀이 보장되면서 간편하게 연결할 수 있는 특징을 제공해야 한다.However, in connecting the synthetic resin pipe, it should provide a feature that can be easily connected while ensuring watertightness.

종래의 합성수지관 연결방법은 전기를 이용한 융착방법의 경우 전기를 공급하기 위한 발전기 또는 전기 공급장치를 필요로 하게 되나, 합성수지관을 지하에 매설하는 경우에는 대부분이 택지나 공장용지 또는 골프장과 같이 대단위 면적을 새롭게 개발하는 경우가 많아서 전기를 공급하는 것이 매우 어렵게 된다.Conventional synthetic resin pipe connection method requires a generator or electric supply device for supplying electricity in the case of fusion method using electricity, but when the synthetic resin pipe is buried underground, most of them are large units such as residential land, factory site, or golf course. New areas are often developed, making it very difficult to supply electricity.

또한 전기를 공급하여 융착시키는 경우에는 융착을 시킨 후 다시 냉각되는 시간이 필요하므로 작업시간의 소모가 많아 외면 당하게 되는 원인이 되었다.In addition, in the case of supplying electricity and fusion, the cooling time is required after the fusion, and thus the consumption of working time increases, causing the external appearance.

또한 플랜지 또는 커플링을 이용한 합성수지관의 연결방법은 합성수지관에 플랜지 또는 커플링을 미리 연결시키기 위한 작업시간의 소모와 비용의 소모가 많아지며, 지하에 매설되는 위치에 연결시킨 상태에서 원주방향으로 일정한 간격의 볼트와 너트를 고정시켜야 하므로 바닥면에 위치하는 부분은 작업하기가 매우 까다롭고, 전체면에서 균일한 압력으로 고정시킬 수 없어서 수밀을 유지하는데 많은 어려움이 발생되었다.In addition, the method of connecting a synthetic resin pipe using a flange or a coupling increases the consumption of work time and the cost of connecting the flange or the coupling to the synthetic resin pipe in advance. Since the bolts and nuts must be fixed at regular intervals, the parts located on the floor are very difficult to work with, and they cannot be fixed at a uniform pressure on the entire surface, which causes many difficulties in maintaining watertightness.

따라서 본 발명은 이러한 종래의 결점을 해소시키기 위하여 안출된 것으로, 적어도 연결구를 이등분하고 내부에 수밀부재 설치홈을 형성하여 이곳에 수밀부재를 삽입하여 양측에서 볼트와 너트를 조이면 수밀부재가 합성수지관의 수밀을 유지할 수 있도록 하는 것이다.Therefore, the present invention has been devised to solve the above-mentioned drawbacks. At least the connector is divided into two, forming a watertight member installation groove therein and inserting the watertight member therein to tighten the bolt and nut on both sides of the synthetic resin tube. It is to keep the water tight.

본 발명은 이등분되는 연결구의 연결부분에서 누수가 발생될 수 있으므로 겹침부가 겹쳐지게 연결되어 수밀을 완벽하게 유지할 수 있도록 하는 것이다.In the present invention, since a leak may be generated at a connection portion of a bisecting connector, the overlapping portions are overlapped so as to maintain watertightness completely.

본 발명은 이등분되는 연결구를 양측에서 볼트와 너트를 간편하게 조임 작업하여 합성수지관의 연결을 누구나 마무리 할 수 있도록 하는 것이다.The present invention is to allow anyone to finish the connection of the synthetic resin pipe by simply tightening the bolt and nut on both sides of the connector is divided into two parts.

본 발명은 연결구(1)가 적어도 상측 연결구(3)와 하측 연결구(3')로 이등분되어(다등분이 가능함) 연결시에는 전체적으로 원형을 이루도록 하는 것이다.According to the present invention, the connector 1 is bisected into at least the upper connector 3 and the lower connector 3 '(which can be divided into two parts) so as to form a circle as a whole.

상측 연결구(3)와 하측 연결구(3')는 서로 대칭되게 형성되는 것으로 내경에서 양측의 가이드부(11, 11')를 제외하고 전체면이 안으로 홈이 파여진 수밀부재 설치홈(7, 7')을 형성한다.The upper connector 3 and the lower connector 3 'are formed to be symmetrical with each other, except for the guide parts 11 and 11' on both sides of the inner diameter thereof. Form ').

상기 수밀부재 설치홈(7, 7')에는 비닐재질의 덮개(10, 10')로 일측면이 감싸진 수밀부재(9, 9')가 설치되어 있으며, 수밀부재(9, 9')가 설치되면 가이드부(11, 11')의 위치보다 높게 돌출된 형태가 되도록 구성하는 것이다.The watertight member installation grooves 7 and 7 'are provided with watertight members 9 and 9' wrapped on one side by a plastic cover 10 and 10 ', and the watertight members 9 and 9' are provided. If installed, it is configured to be in a form protruding higher than the position of the guide portion (11, 11 ').

상기 상측 연결구(3)와 하측 연결구(3')에는 서로 다른 위치에 겹침 돌출부(8, 8')와 겹침부(6, 6')를 형성하여 겹침 돌출부(8)는 겹침부(6')에 겹침돌출부(8')는 겹침부(6)에 각각 위치하도록 한다.In the upper connector 3 and the lower connector 3 ', overlap protrusions 8 and 8' and overlap portions 6 and 6 'are formed at different positions so that the overlap protrusion 8 is overlapping portion 6'. The overlap protrusions 8 'are positioned at the overlap portions 6, respectively.

상기 겹침부(6, 6')는 호상으로 형성되는 선단에서 외측으로 돌출되도록 형성되어 있으며, 겹침 돌출부(8, 8')는 수밀부재 설치홈(7, 7')의 폭과 동일하게 형성하는 것이다.The overlapping portions 6 and 6 'are formed to protrude outward from the tip formed in an arc shape, and the overlapping protrusions 8 and 8' are formed to have the same width as that of the watertight member installation grooves 7 and 7 '. will be.

상기 겹침 돌출부(8, 8')는 외측으로 갈수록 좁아지는 형상으로 돌출되어 있고, 내경에는 수밀부재(9, 9')가 동일한 위치에 형성되어 있다.The overlapping protrusions 8 and 8 'protrude in a shape that narrows toward the outside, and the watertight members 9 and 9' are formed at the same position in the inner diameter.

상기 상측 연결구(3)와 하측 연결구(3')의 양측 선단에는 체결 돌출부(4, 4')를 형성하되 등간격으로 적어도 2곳 이상에 체결공(14, 14')을 형성하고 일측에서는 보강리브(5, 5')가 지지되도록 하여 볼트(12)와 너트(13)의 결합력으로 결합되도록 한다.Fastening protrusions 4 and 4 'are formed at both ends of the upper connector 3 and the lower connector 3', and at least two fastening holes 14 and 14 'are formed at equal intervals and one side is reinforced. The ribs 5, 5 ′ are supported so that they are coupled by the coupling force of the bolt 12 and the nut 13.

상기 체결돌출부(4, 4') 중 너트(13)가 위치하는 부분에는 너트홈(16)을 형성하고, 겹침부(6, 6')의 일측에서는 체결돌출부(4, 4')에서 약간 돌출되는 돌턱(15)을 형성한다.The nut groove 16 is formed in a portion where the nut 13 is located among the fastening protrusions 4 and 4 ', and slightly protrudes from the fastening protrusions 4 and 4' at one side of the overlapping portions 6 and 6 '. To form a step (15).

이러한 구성으로 이루어진 본 발명은 연결구(1)가 동일한 형태로 형성되어 적어도 이등분되도록 사출성형하는 것이며, 성형된 이후에는 수밀부재 설치홈(7, 7')에 수밀부재(9, 9')를 설치하되 덮개(10, 10')가 설치되지 않은 쪽을 대고 눌러서 고정시킨다.According to the present invention having the above configuration, the connector 1 is formed in the same shape and is injection molded to be at least bisected, and after the molding, the watertight members 9 and 9 'are installed in the watertight member installation grooves 7 and 7'. But press the cover (10, 10 ') is not installed on the side to be fixed.

연결구(1)를 완성시키어 생산된 합성수지관(2)을 연결함에 있어서, 합성수지관(2)을 연결시킬 위치의 하측 지면에 흙이나 목재 또는 콘크리트 등을 미리 설치하고 그 상측에 하측 연결구(3')를 설치한다.In connecting the synthetic resin pipe (2) produced by completing the connector (1), the soil or wood or concrete, etc. is pre-installed on the lower ground of the position to connect the synthetic resin pipe (2) and the lower connector (3 ' Install).

하측 연결구(3')의 수밀부재(9')에 형성된 덮개(10')를 분리하고 중앙 상측으로 합성수지관(2)을 맞대기 하여 올려놓고 상측 연결구(3)를 하측 연결구(3')에 조립한다.Remove the cover 10 'formed on the watertight member 9' of the lower connector 3 'and put the synthetic resin pipe 2 abut on the upper side, and assemble the upper connector 3 to the lower connector 3'. do.

상측 연결구(3)의 수밀부재(9)에 형성된 덮개(10)를 제거한 후 체결공(14)에 볼트(12)를 넣고 체결공(14')에 형성된 너트홈(16)에 너트(13)를 넣은 후 볼트(12)를 회전시켜 상측 연결구(3)와 하측 연결구(3')를 연결시키게 된다.After removing the cover 10 formed in the watertight member 9 of the upper connector 3, the bolt 12 is inserted into the fastening hole 14, and the nut 13 is inserted into the nut groove 16 formed in the fastening hole 14 '. After inserting the bolt 12 is rotated to connect the upper connector (3) and the lower connector (3 ').

이때, 상측 연결구(3)와 하측 연결구(3')의 연결을 통하여 합성수지관(2)의 외측면을 수밀부재(9, 9')가 감싸면서 누수를 방지하게 되며, 겹침 돌출부(8, 8')는 상대방의 겹침부(6, 6')에 위치한 상태에서 볼트(12)와 너트(13)의 조임력에 따라서 도 5 와 같이 연결되므로 연결부분에서의 누수를 방지하게 된다.At this time, the watertight members 9 and 9 'surround the outer surface of the synthetic resin pipe 2 through the connection of the upper connector 3 and the lower connector 3' to prevent leakage, and overlapping protrusions 8 and 8 ') Is connected as shown in Figure 5 in accordance with the tightening force of the bolt 12 and the nut 13 in the overlapping portion (6, 6') of the other side to prevent leakage at the connection portion.

상기 수밀부재(9, 9')는 고무와 같은 연성의 수밀부재를 사용하거나, 함멜트와 같은 부드러운 재질을 사용할 수 있는 것이다.The watertight members 9 and 9 'may use a soft watertight member such as rubber, or a soft material such as a melt.

또한 수밀부재(9, 9')는 양측의 가이드부(11, 11') 보다 돌출된 상태에서 연결되므로 수밀부재(9, 9')가 합성수지관(2)을 감싸면서 상측 연결구(3)와 하측 연결구(3')의 조임력에 의하여 누수를 방지하여 수밀을 유지할 수 있게 된다.In addition, since the watertight members 9 and 9 'are protruded from the guide portions 11 and 11' on both sides, the watertight members 9 and 9 'surround the synthetic resin pipe 2 and the upper connector 3 and By the tightening force of the lower connector (3 ') it is possible to prevent water leakage to maintain the watertight.

이때, 체결 돌출부(4, 4') 중 겹침 돌출부(8, 8')가 없는 한쪽부분에 돌턱(15)이 형성되어 있어서 볼트(12)와 너트(13)의 조임력이 체결 돌출부(4, 4')를 통하여 작용되도록 하였다.At this time, the stone projection 15 is formed at one portion of the fastening protrusions 4 and 4 'without the overlapping protrusions 8 and 8', so that the tightening force of the bolt 12 and the nut 13 is fastened to the fastening protrusions 4 and 4 '. ') To act through.

상기 상측 연결구(3)와 하측 연결구(3')는 금속을 이용하는 것이 가능하지만 고강도 합성수지를 이용하는 것이 더 조임력의 작용이 좋다.The upper connector 3 and the lower connector 3 'can be made of metal, but it is better to use a high strength synthetic resin.

본 발명은 적어도 연결구를 이등분하고 내부에 수밀부재 설치홈을 형성하여 이곳에 수밀부재를 삽입하여 양측에서 볼트와 너트를 조이면 수밀부재가 합성수지관의 외경에서 수밀을 유지할 수 있도록 하는 것이다.The present invention is to at least bisect the connector and form a watertight member installation groove therein to insert the watertight member therein and tighten the bolts and nuts on both sides so that the watertight member can maintain the watertight at the outer diameter of the synthetic resin tube.

본 발명은 이등분되는 연결구의 연결부분에서 누수가 발생될 수 있으므로 겹침부와 겹침 돌출부가 겹쳐지게 연결되어 수밀을 완벽하게 유지할 수 있도록 하는 것이다.In the present invention, since a leak may be generated at the connection part of the bisecting connector, the overlapping part and the overlapping protrusion part are connected to overlap each other so as to completely maintain the watertightness.

본 발명은 이등분되는 연결구를 양측에서 볼트와 너트를 간편하게 조임작업하여 합성수지관의 연결을 누구나 빠른 시간에 마무리 할 수 있도록 하는 것이다.The present invention is to allow anyone to finish the connection of the synthetic resin pipe in a short time by simply tightening the bolt and nut on both sides of the connector is divided into two parts.

도 1 은 본 발명의 합성수지관 일측을 분리한 상태의 사시도1 is a perspective view of a state in which one side of the synthetic resin tube of the present invention is separated

도 2 는 본 발명의 합성수지관을 양측으로 분리한 상태의 사시도Figure 2 is a perspective view of the synthetic resin tube of the present invention separated on both sides

도 3 은 본 발명의 분리상태 사시도3 is an exploded perspective view of the present invention

도 4 는 본 발명의 측면도4 is a side view of the present invention;

도 5 는 본 발명의 도 4 에 대한 주요부분의 확대 단면도5 is an enlarged cross-sectional view of the main part of FIG. 4 of the present invention;

도 6 은 본 발명의 연결구를 조립하기 위한 측면도Figure 6 is a side view for assembling the connector of the present invention

도 7 은 본 발명의 연결상태를 나타낸 일부 단면도7 is a partial cross-sectional view showing a connection state of the present invention

도 8 은 본 발명의 연결구에 대한 주요부분의 단면도8 is a cross-sectional view of an essential part of the connector of the present invention.

[도면의 주요 부분에 대한 부호의 설명][Description of Symbols for Main Parts of Drawing]

1 : 연결구 2 : 합성수지관1 connector 2 synthetic resin pipe

3, 3' : 상측 연결구 4, 4' : 체결 돌출부3, 3 ': Upper connector 4, 4': Tightening protrusion

5, 5' : 보강리브 6, 6' : 겹침부5, 5 ': Reinforcement rib 6, 6': Overlap

7, 7' : 수밀부재 설치홈 8, 8' : 겹침 돌출부7, 7 ': Watertight member installation groove 8, 8': Overlap protrusion

9, 9' : 수밀부재 10, 10' : 덮개9, 9 ': Watertight member 10, 10': Cover

11, 11' : 가이드부 12 : 볼트11, 11 ': guide part 12: bolt

13 : 너트 14, 14' : 체결공13: nut 14, 14 ': fastener

15 : 돌턱15: stone jaw

Claims (3)

원형의 연결구를 이용하여 합성수지관(2)을 맞대기 하여 수밀이 유지되도록 연결시킴에 있어서,In connecting the synthetic resin pipe (2) butt to maintain the watertight using a circular connector, 적어도 이등분되어 대칭되도록 양측으로 형성된 가이드부(11, 11')의 내부에 수밀부재 설치홈(7, 7')을 형성하여 수밀부재(9, 9')를 고정시키고, 수밀부재 설치홈(7, 7')의 일측으로 겹침 돌출부(8, 8')와 겹침부(6, 6')가 각각 다른 위치에 형성되며, 양측으로 체결 돌출부(4, 4')가 돌출되는 상측 연결구(3)와 하측 연결구(3')가 합성수지관(2)을 연결시키도록 함을 특징으로 하는 합성수지관 연결구의 연결구조.Watertight member mounting grooves 7 and 7 'are formed in the guide portions 11 and 11' formed at both sides so as to be symmetrically at least bisected to fix the watertight members 9 and 9 ', and the watertight member mounting groove 7 7 '), the overlapping protrusions 8 and 8' and the overlapping portions 6 and 6 'are formed at different positions, respectively, and the upper connector 3 on which the fastening protrusions 4 and 4' protrude to both sides. And the lower connector (3 ') is a connection structure of a synthetic resin pipe connector, characterized in that to connect the synthetic resin pipe (2). 제1항에 있어서, 겹침부(6, 6')의 일측으로 체결 돌출부(4, 4')에서 돌턱(15)이 돌출됨을 특징으로 하는 합성수지관 연결구의 연결구조.The connection structure of a synthetic resin pipe connector according to claim 1, wherein the projection (15) is protruded from the fastening protrusion (4, 4 ') to one side of the overlapping portion (6, 6'). 제1항에 있어서, 겹침 돌출부(8, 8')는 일측으로 수밀부재(9, 9')가 형성되며 수밀부재 설치홈(7, 7')의 일측에서 돌출되어 겹침부(6, 6')와 만나고 외측으로 갈수록 좁아지는 형상으로 형성됨을 특징으로 하는 합성수지관 연결구의 연결구조.2. The overlapping protrusions 8 and 8 'are formed with watertight members 9 and 9' at one side, and protrude from one side of the watertight member mounting grooves 7 and 7 '. The connecting structure of the synthetic resin pipe connector, characterized in that formed in a shape that narrows toward the outside facing.
KR1020030067697A 2003-09-30 2003-09-30 a KR20050031530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020030067697A KR20050031530A (en) 2003-09-30 2003-09-30 a

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020030067697A KR20050031530A (en) 2003-09-30 2003-09-30 a

Publications (1)

Publication Number Publication Date
KR20050031530A true KR20050031530A (en) 2005-04-06

Family

ID=37236383

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020030067697A KR20050031530A (en) 2003-09-30 2003-09-30 a

Country Status (1)

Country Link
KR (1) KR20050031530A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100980766B1 (en) * 2009-11-30 2010-09-10 와이피건설주식회사 Structure and method for preventing leaking water on water pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100980766B1 (en) * 2009-11-30 2010-09-10 와이피건설주식회사 Structure and method for preventing leaking water on water pipe

Similar Documents

Publication Publication Date Title
KR200389196Y1 (en) Connecting pipe using flange
KR20080026751A (en) Pipe connector having a locking and connecting socket
KR20160004207U (en) Waterproof connector of sewer concrete pipe joint with socket
KR200394863Y1 (en) Connecting Flange for Manhole Drain Pipe
KR100805689B1 (en) Boiler junction tube made from polypropylene random copolymer and polybutylene
KR20050031530A (en) a
KR100716063B1 (en) One body type for pipe connection
KR100772683B1 (en) Assembly type precast manhole
KR100528714B1 (en) a
KR200402713Y1 (en) connection structure of pipe for a manhole
KR100642295B1 (en) Connecting pipe of manhole and that coupling struction
KR100488219B1 (en) The structure coupling flange and pipe
KR200395103Y1 (en) A connection structure for pipe sealing
KR20050028223A (en) a
KR20080030812A (en) Rubber connctor for manhole and form of construction work
KR100743207B1 (en) Composite plastic pipe for flange all style connection
KR100894896B1 (en) Drain-pipe connection structure of manhole
KR100764842B1 (en) A coupling connectiontool for drainpipe
KR100859596B1 (en) A coupling pipe for waterproofing of plastic pipe
KR200337197Y1 (en) a
KR100620562B1 (en) Method of manufacturing manhole using connecting pipe
KR20060002507A (en) A connection formation of plastic pipe
KR200261913Y1 (en) Rounding drain pipe using a high density polyethylene
KR100442050B1 (en) Apparatus for clamping a pipe and manhole and method for mounting
KR100425279B1 (en) a

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application