KR20090043888A - Bendable packer for fill up standing water - Google Patents

Bendable packer for fill up standing water Download PDF

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KR20090043888A
KR20090043888A KR1020070109684A KR20070109684A KR20090043888A KR 20090043888 A KR20090043888 A KR 20090043888A KR 1020070109684 A KR1020070109684 A KR 1020070109684A KR 20070109684 A KR20070109684 A KR 20070109684A KR 20090043888 A KR20090043888 A KR 20090043888A
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South Korea
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packer
refractive
refractive index
side plates
pair
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KR1020070109684A
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Korean (ko)
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KR100942260B1 (en
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이영숙
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웅진고분자 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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/1645—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing material being introduced inside the pipe by means of a tool moving in the pipe
    • F16L55/16455—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing material being introduced inside the pipe by means of a tool moving in the pipe a part of the tool defining, together with the inner wall of the pipe, an enclosed space into which sealing material is injected
    • 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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/18—Appliances for use in repairing pipes

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sewage (AREA)

Abstract

본 발명은 하수관, 암거, 지중관로 등의 지중 매설관 내부를 보수하는 데 이용되는 팩커에 관한 것으로, 보다 상세하게는 지중 매설관의 굴절된 부분에 대응하여 용이하게 굴절됨으로써 지중 매설관의 굴절 부분에 대한 보수를 보다 용이하게 할 수 있는 충진지수용 굴절식 팩커에 관한 것이다. The present invention relates to a packer used to repair the inside of underground buried pipes such as sewer pipes, culverts, underground pipes, etc. More specifically, the refracted portion of underground buried pipes is easily refracted in response to the refracted portion of underground buried pipes. It relates to a refractive index packer for the filling index that can be more easily repaired.

본 발명에 의한 충진지수용 굴절식 팩커는, 이격된 한 쌍의 측판; 상기 한 쌍의 측판에 밀봉적으로 결합됨으로써 밀폐적인 에어공간을 형성하고, 상기 에어공간으로 주입되는 에어에 의해 팽창가능하며, 외주면에 차수제 및 경화제를 압출시키는 하나 이상의 압출노즐이 형성된 팽창튜브; 및 상기 한 쌍의 측판을 연결하고, 굴절가능한 굴절연결체;를 포함한다.Refractory packer for the filling index according to the present invention, a pair of side plates spaced apart; An expansion tube that sealably couples to the pair of side plates to form a hermetic air space, is expandable by air injected into the air space, and has one or more extrusion nozzles extruded on the outer circumferential surface of the water repellent agent and the hardener; And a refractive connector connecting the pair of side plates and refracting.

굴절, 팩커, 측판, 에어공간, 차수제, 경화제, 압출노즐 Refractive, packer, side plate, air space, water repellent, hardener, extrusion nozzle

Description

충진지수용 굴절식 팩커{BENDABLE PACKER FOR FILL UP STANDING WATER}BENDABLE PACKER FOR FILL UP STANDING WATER}

본 발명은 하수관, 암거, 지중관로 등의 지중 매설관 내부를 보수하는 데 이용되는 팩커에 관한 것으로, 보다 상세하게는 지중 매설관의 굴절된 부분에 대응하여 용이하게 굴절됨으로써 지중 매설관의 굴절 부분에 대한 보수를 보다 용이하게 할 수 있는 충진지수용 굴절식 팩커에 관한 것이다. The present invention relates to a packer used to repair the inside of underground buried pipes such as sewer pipes, culverts, underground pipes, etc. More specifically, the refracted portion of underground buried pipes is easily refracted in response to the refracted portion of underground buried pipes. It relates to a refractive index packer for the filling index that can be more easily repaired.

일반적으로 콘크리트흄관, 염화비닐관 등과 같은 하수관, 암거 및 기타 관로 등과 같은 지중 매설관은 구조적인 노후화 및 지하 지반의 침하, 지상에서의 토압 변동, 외부하중에 의한 균열 및 파손 등의 흠결에 의해 빛물이 침수되거나 관 내부의 오폐수가 이 균열 및 파손된 부분을 통해 지하에 스며들어 토양을 오염시키거나 지반의 침식을 일으키는 문제점이 있었다. In general, underground buried pipes such as sewage pipes such as concrete fume pipes and vinyl chloride pipes, culverts, and other pipelines are damaged by defects such as structural aging, subsidence of underground soils, earth pressure fluctuations, and cracks and breaks caused by external loads. There was a problem that the flooded or sewage inside the pipe penetrates underground through this crack and broken part to contaminate the soil or cause soil erosion.

이러한 매설관의 내부를 보수하기 위한 공법에는 비굴착공법, 굴착공법 등이 있으며, 매설관의 손상 부위 특성 및 주변 여건에 따라 적절히 선택되어 이용될 수 있다. 특히, 직경이 작은 매설관의 경우 그 내부에 작업자가 들어갈 수 없기 때문에 무인카메라, 팩커 등과 같은 보수장치를 이용한 비굴착공법이 주로 이용된다. There are non-excavation method, excavation method and the like for repairing the interior of the buried pipe, and may be appropriately selected and used according to the damage site characteristics and surrounding conditions of the buried pipe. In particular, in the case of the buried pipe having a small diameter because the operator can not enter the inside, a non-excavation method using a maintenance device such as an unmanned camera, a packer and the like is mainly used.

무인카메라 등에 의해 지중 매설관 등의 손상 부분을 정확하게 검사한 후에 이 손상된 부분에 팩커를 이동시킨 후에 팩커를 팽창시켜 일시적으로 지수시키고, 팩커의 노즐을 통해 액상 또는 겔상의 차수제를 그 손상부분에 주입시킴으로써 하수관의 손상 부분을 보수한다. After inspecting the damaged part such as underground buried pipe accurately by unmanned camera, move the packer to this damaged part, and then expand the packer to temporarily quench the liquid and gel water repellent agent through the packer's nozzle. Repair the damaged part of the sewer pipe by injecting it.

하지만, 이러한 종래의 팩커는 지중 매설관의 굴절된 부분에서 손상이 발생할 경우 팩커의 굴절이 용이하지 못하여 그 보수작업이 원활하게 이루어지지 못하는 문제점이 있었다. However, such a conventional packer has a problem in that the repair of the packer is not easy when the damage occurs in the refracted portion of the underground buried pipe, and thus the repair work cannot be performed smoothly.

본 발명은 상기와 같은 점을 감안하여 안출한 것으로, 굴절가능한 구조를 적용함으로써 지중 매설관의 굴절된 부분에서 손상이 발생된 경우 지중 매설관의 굴절된 부분에 대응하여 팩커를 굴절시킨 후에 그 보수작업을 수행할 수 있는 충진지수용 굴절식 팩커를 제공하는 데 그 목적이 있다. The present invention has been made in view of the above, and when the damage is generated in the refracted portion of the underground buried pipe by applying a refractive structure, the packer is refracted in response to the refracted portion of the underground buried pipe and repaired thereafter. It is an object of the present invention to provide an articulated packer for filling indices capable of performing work.

상기와 같은 목적을 달성하기 위한 본 발명의 충진지수용 굴절식 팩커는, Refractive Packer for Fill Index of the present invention for achieving the above object,

이격된 한 쌍의 측판;A pair of spaced side plates;

상기 한 쌍의 측판에 밀봉적으로 결합됨으로써 밀폐적인 에어공간을 형성하고, 상기 에어공간으로 주입되는 에어에 의해 팽창가능하며, 외주면에 차수제 및 경화제를 압출시키는 하나 이상의 압출노즐이 형성된 팽창튜브; 및 An expansion tube that sealably couples to the pair of side plates to form a hermetic air space, is expandable by air injected into the air space, and has one or more extrusion nozzles extruded on the outer circumferential surface of the water repellent agent and the hardener; And

상기 한 쌍의 측판을 연결하고, 굴절가능한 굴절연결체;를 포함한다. It comprises a; connecting the pair of side plates, the refracting refractive connector.

상기 굴절연결체는 그 양단부가 각 측판의 중심부에 결합된다. Both ends of the refractive connector are coupled to the center of each side plate.

상기 굴절연결체는 주름관, 굴절가능한 튜브 중에서 어느 하나로 이루어진 것을 특징으로 한다.The refractive connector is characterized in that consisting of any one of the corrugated tube, the refractive tube.

상기 팽창튜브는 그 외주면에 복수의 실링돌기부가 원주방향으로 형성된다. The expansion tube has a plurality of sealing protrusions formed in the circumferential direction on the outer circumferential surface thereof.

상기 압출노즐은 차수제를 압출시키는 제1압출노즐 및 경화제를 압출시키는 제2압출노즐로 이루어진다. The extrusion nozzle comprises a first extrusion nozzle for extruding the water filler and a second extrusion nozzle for extruding the curing agent.

상기와 같은 본 발명은, 굴절가능한 구조를 적용함으로써 지중 매설관의 굴절된 부분에서 손상이 발생된 경우 지중 매설관의 굴절된 부분에 대응하여 팩커를 굴절시킨 후에 차수제를 주입하여 차수층을 형성할 수 있고, 이에 의해 다양한 굴절 구조를 가진 지중 매설관의 보수작업을 보다 원활하게 수행할 수 있는 장점이 있다. The present invention as described above, if the damage occurs in the refracted portion of the underground buried pipe by applying the refractive structure to refractory packer corresponding to the refracted portion of the underground buried pipe after the filler is injected to form the order layer And, thereby there is an advantage that can be performed more smoothly the repair work of underground buried pipe having a variety of refractive structures.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명한다. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 충진지수용 굴절식 팩커를 도시한다. 1 illustrates an articulated packer for filling indices in accordance with one embodiment of the present invention.

도시된 바와 같이, 본 발명에 의한 충진지수용 굴절식 팩커(10)는 한 쌍의 측판(11, 12), 상기 한 쌍의 측판(11, 12)에 밀봉적으로 결합된 팽창튜브(20), 상기 한 쌍의 측판(11, 12)을 굴절가능하게 연결하는 굴절연결체(30)를 포함한다. As shown, the refractive index packer 10 for filling index according to the present invention is a pair of side plates (11, 12), the expansion tube (20) sealingly coupled to the pair of side plates (11, 12) And, it includes a refractive connector 30 for refractively connecting the pair of side plates (11, 12).

한 쌍의 측판(11, 12)은 일정간격으로 이격되고, 어느 일측의 측판(11)에는 하나 이상의 에어호스(13a), 차수제 주입호스(14a), 경화제 주입호스(14b)가 관통되며, 각 측판(11, 12)에는 하나 이상의 바퀴(11a, 12a)를 가진다. 에어호스(13a)는 에어노즐(13)과 소통하고, 차수제 주입호스(14a)는 제1압출노즐(27a)과 소통하며, 경화제 주입호스(14b)는 제2압출노즐(27b)과 소통한다. The pair of side plates 11 and 12 are spaced at regular intervals, and one or more air hoses 13a, the filler injection hose 14a, and the curing agent injection hose 14b penetrate through the side plates 11 on either side. Each side plate 11, 12 has one or more wheels 11a, 12a. The air hose 13a communicates with the air nozzle 13, the filler injection hose 14a communicates with the first extrusion nozzle 27a, and the hardener injection hose 14b communicates with the second extrusion nozzle 27b. do.

각 측판(11, 12)의 외주면에는 팽창튜브(20)의 양단부가 브라켓(22) 및 체결구(23) 등에 의해 결합되며, 팽창튜브(20)의 각 단부와 각 측판(11, 12) 사이에는 오링 등과 같은 실링부재(24)가 개재됨으로써 팽창튜브(20) 및 측판(11, 12)은 그 사이 공간에 밀폐적인 에어공간(21)을 형성하고, 이 에어공간(21)에는 에어노즐(13)이 소통된다. Both ends of the expansion tube 20 are coupled to the outer circumferential surface of each side plate 11 and 12 by a bracket 22 and a fastener 23, and between each end of the expansion tube 20 and each side plate 11 and 12. By interposing a sealing member 24 such as an O-ring, the expansion tube 20 and the side plates 11 and 12 form an air space 21 that is sealed in the space therebetween, and in the air space 21 an air nozzle ( 13) is communicated.

팽창튜브(20)는 굴절이 용이(bendable)하고 길이방향으로의 신축 내지 외경방향으로의 팽창이 용이한 고무재질로 이루어질 수 있고, 이 팽창튜브(20)는 장구형 또는 원통형으로 형성될 수 있으며, 팽창튜브(20)의 외주면에는 하나 이상의 실링돌기부(25)가 원주방향으로 형성될 수 있다. The expansion tube 20 may be made of a rubber material that is easy to bend and expands in the longitudinal direction to the outer diameter direction, and the expansion tube 20 may be formed in a long or cylindrical shape. On the outer circumferential surface of the expansion tube 20, one or more sealing protrusions 25 may be formed in the circumferential direction.

팽창튜브(20)는 그 외주면 일측에 하나 이상의 압출노즐(27a, 27b)을 구비하고, 이 압출노즐(27a, 27b)은 차수제 주입호스(14a) 및 경화제 주입호스(14b)와 소통한다. 이 압출노즐(27)은 차수제 주입호스(14a)와 연결되어 차수제를 압출시키는 제1압출노즐(27a) 및 경화제 주입호스(14b)와 연결되어 경화제를 압출시키는 제2압출노즐(27b)로 이루어진다. The expansion tube 20 has one or more extruded nozzles 27a and 27b on one side of its outer circumferential surface, and the extruded nozzles 27a and 27b communicate with the water filler injection hose 14a and the hardener injection hose 14b. The extrusion nozzle 27 is connected to the filler injection hose 14a and is connected to the first extrusion nozzle 27a for extruding the filler and the second extrusion nozzle 27b for extruding the curing agent to be connected to the curing agent injection hose 14b. Is made of.

굴절연결체(30)는 팽창튜브(20)의 중심부에 배치되고, 각 양단부(31, 32)가 각 측판(11, 12)의 중심부에 클램프(35) 등에 의해 결합됨으로써 한 쌍의 측판(11, 12)을 굴절가능하게 연결할 수 있다. The articulation connector 30 is disposed in the center of the expansion tube 20, and both ends 31 and 32 are coupled to the center of each side plate 11 and 12 by a clamp 35 or the like to thereby provide a pair of side plates 11. , 12) can be deflectably connected.

이러한 굴절연결체(30)는 도 1에 예시된 바와 같이 주름관 구조로 이루어질 수도 있고, 또한 도 2에 예시된 바와 같이 고무 등과 같이 굴절이 용이한 유연한 재질로 이루어진 고무 호스 등으로 이루어질 수도 있다. The refractive connector 30 may be made of a corrugated pipe structure as illustrated in FIG. 1, or may be made of a rubber hose made of a flexible material such as rubber, which is easily bent as illustrated in FIG. 2.

이상과 같이 구성된 본 발명의 작동을 도 3 및 도 4를 참조하여 상세히 설명한다. The operation of the present invention configured as described above will be described in detail with reference to FIGS. 3 and 4.

도 3에 도시된 바와 같이, 하수관과 같은 지중 매설관(50)의 굴절된 부 분(51)에 균열, 파손 등과 같은 손상부분(52)이 발생하면, 본 발명의 충진지수용 굴절식 팩커(10)는 바퀴(11a, 12a)에 의해 굴절 부분(51)까지 이동하고, 이때 충진지수용 굴절식 팩커(10)는 굴절연결체(30) 및 팽창튜브(20)의 굴절가능한 특성에 의해 매설관(50)의 굴절 부분(51)에 대응하여 굴절되면서 이동한다. As shown in FIG. 3, when a damaged portion 52 such as a crack or breakage occurs in the refracted portion 51 of the underground buried pipe 50 such as a sewage pipe, the refractive index packer for filling index of the present invention ( 10 moves by the wheels 11a, 12a to the refractive portion 51, where the refractive index packer 10 for filling index is buried by the refractive properties of the refractive connector 30 and the expansion tube 20. It moves while refracting corresponding to the refracting portion 51 of the tube 50.

도 4에 도시된 바와 같이 충진지수용 굴절식 팩커(10)가 매설관(50)의 굴절에 맞춰 적절히 굴절 이동된 후에, 공기압축기 등과 같은 에어공급원에 의해 에어가 에어노즐(13)을 통해 팽창튜브(20)의 에어공간(21)측으로 유입되면, 팽창튜브(20)는 그 외경방향으로 팽창하여 매설관(50)의 굴절된 부분(51)을 지수한다. 이때, 팽창튜브(20)는 실링돌기부(25)에 의해 매설관(50)의 내경면에 보다 기밀하게 밀착되어 그 지수성을 더욱 향상시킬 수 있다. As shown in FIG. 4, after the refractive index packer 10 for filling index is properly deflected in accordance with the deflection of the buried pipe 50, the air is expanded through the air nozzle 13 by an air source such as an air compressor. When introduced into the air space 21 side of the tube 20, the expansion tube 20 expands in its outer diameter direction and expels the refracted portion 51 of the buried pipe 50. At this time, the expansion tube 20 is more tightly adhered to the inner diameter surface of the buried pipe 50 by the sealing protrusion 25 can further improve its index.

그런 다음에, 팽창튜브(20)의 제1 및 제2 압출노즐(27a, 27b)을 통해 차수제 및 경화제를 압출시키면 차수제 및 경화제가 동시에 매설관(50)의 손상부분(52)으로 주입된 후에 경화됨으로써 차수층(55)을 형성한다. Then, the water repellent agent and the hardener are extruded through the first and second extrusion nozzles 27a and 27b of the expansion tube 20, and the water repellent agent and the hardener are simultaneously injected into the damaged portion 52 of the buried pipe 50. After curing, the order layer 55 is formed.

특히, 본 발명은 차수제 및 경화제를 각각 개별적으로 압출시키는 제1 및 제2 압출노즐(27a, 27b)로 구분됨으로써 차수제의 분출작용 및 차수제의 경화작용이 매우 신속하고 정확하게 이루어지는 장점이 있다. In particular, the present invention is divided into the first and second extrusion nozzles (27a, 27b) for extruding the water-repellent agent and the curing agent, respectively, there is an advantage that the spraying action of the water-repellent agent and the curing action of the water-repellent agent is very fast and accurate .

이상과 같은 본 발명의 충진지수용 굴절식 팩커(10)는 매설관(50)의 굴절 부분(51)에 대응하여 용이하게 굴절됨으로써 그 굴절 부분(51)에서 발생하는 손상부분(52)에 대한 보수 또는 차수 작업을 보다 간편하게 진행할 수 있는 장점이 있다. The refractive index packer 10 of the present invention as described above is easily refracted in correspondence with the refractive portion 51 of the buried pipe 50 to the damage portion 52 generated in the refractive portion 51 There is an advantage that can be more easily carried out repair or order work.

도 1은 본 발명의 일 실시예에 따른 충진지수용 굴절식 팩커를 도시한 부분 단면도, 1 is a partial cross-sectional view showing a refractive index packer for the filling index according to an embodiment of the present invention,

도 2는 본 발명의 다른 실시예에 따른 충진지수용 굴절식 팩커를 도시한 부분 단면도, 2 is a partial cross-sectional view showing a refractive index packer for the filling index according to another embodiment of the present invention,

도 3은 본 발명의 충진지수용 굴절식 팩커가 굴절된 매설관 내에 진입되는 상태를 도시한 도면,3 is a view showing a state in which the refractive index for the filling index of the present invention enters the refractory buried pipe,

도 4는 본 발명의 충진지수용 굴절식 팩커가 매설관의 굴절된 부분에서 팽창되어 그 보수작업을 수행하는 상태를 도시한 도면이다. 4 is a view illustrating a state in which the refractive index packer for the filling index of the present invention is expanded in the refracted portion of the buried pipe to perform the repair work.

* 도면의 주요 부분에 대한 부호의 간단한 설명 *Brief description of symbols for the main parts of the drawings

10: 충진지수용 굴절식 팩커 11, 12: 측판10: refractive packer for filling index 11, 12: side plate

20: 팽창튜브 30: 굴절연결체20: expansion tube 30: refractive connector

Claims (5)

이격된 한 쌍의 측판;A pair of spaced side plates; 상기 한 쌍의 측판에 밀봉적으로 결합됨으로써 밀폐적인 에어공간을 형성하고, 상기 에어공간으로 주입되는 에어에 의해 팽창가능하며, 외주면에 차수제 및 경화제를 압출시키는 하나 이상의 압출노즐이 형성된 팽창튜브; 및 An expansion tube that sealably couples to the pair of side plates to form a hermetic air space, is expandable by air injected into the air space, and has one or more extrusion nozzles extruded on the outer circumferential surface of the water repellent agent and the hardener; And 상기 한 쌍의 측판을 연결하고, 굴절가능한 굴절연결체;를 포함하는 것을 특징으로 하는 충진지수용 굴절식 팩커.Linking the pair of side plates, the refractive index refractive indexer comprising a; refractive index packer comprising a. 제1항에 있어서, The method of claim 1, 상기 굴절연결체는 그 양단부가 각 측판의 중심부에 결합된 것을 특징으로 하는 충진지수용 굴절식 팩커.The refractive index of the refractive index of the filling index, characterized in that both ends are coupled to the center of each side plate. 제1항에 있어서, The method of claim 1, 상기 굴절연결체는 주름관, 굴절가능한 튜브 중에서 어느 하나로 이루어진 것을 특징으로 하는 충진지수용 굴절식 팩커.The refractive connector is a corrugated tube, refractive index packer for filling index, characterized in that consisting of any one of the tube. 제1항에 있어서, The method of claim 1, 상기 팽창튜브는 그 외주면에 복수의 실링돌기부가 원주방향으로 형성된 것을 특징으로 하는 충진지수용 굴절식 팩커. The expansion tube is a refractive index packer, characterized in that a plurality of sealing projections formed in the circumferential direction on the outer peripheral surface. 제1항에 있어서, The method of claim 1, 상기 압출노즐은 차수제를 압출시키는 제1압출노즐 및 경화제를 압출시키는 제2압출노즐로 이루어진 것을 특징으로 하는 충진지수용 굴절식 팩커. The extrusion nozzle is a refractive index packer for the filling index, characterized in that consisting of a first extrusion nozzle for extruding the water-repellent agent and a second extrusion nozzle for extruding the curing agent.
KR1020070109684A 2007-10-30 2007-10-30 Bendable packer for fill up standing water KR100942260B1 (en)

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KR101872259B1 (en) * 2017-12-12 2018-06-29 (주)로터스지이오 Unreinforced part and main pipe and branch pipe joint maintenance system
KR102478004B1 (en) * 2022-03-15 2022-12-15 나성건설산업 주식회사 Pipeline repair system and pipeline repair method using the repair system

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KR20040000159A (en) * 2002-06-24 2004-01-03 한종옥 A sewer-branch-pipe repair apparatus and its method
KR100639268B1 (en) * 2004-11-17 2006-10-26 최재현 Top and bottom water pipe part repair device and method of construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101872259B1 (en) * 2017-12-12 2018-06-29 (주)로터스지이오 Unreinforced part and main pipe and branch pipe joint maintenance system
KR102478004B1 (en) * 2022-03-15 2022-12-15 나성건설산업 주식회사 Pipeline repair system and pipeline repair method using the repair system

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