KR101180466B1 - Insulating pipe for protection of underground transmission line - Google Patents

Insulating pipe for protection of underground transmission line Download PDF

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Publication number
KR101180466B1
KR101180466B1 KR1020120054602A KR20120054602A KR101180466B1 KR 101180466 B1 KR101180466 B1 KR 101180466B1 KR 1020120054602 A KR1020120054602 A KR 1020120054602A KR 20120054602 A KR20120054602 A KR 20120054602A KR 101180466 B1 KR101180466 B1 KR 101180466B1
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KR
South Korea
Prior art keywords
piece
protective tube
support rod
tube
transmission line
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KR1020120054602A
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Korean (ko)
Inventor
전영록
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기술사사무소 세일엔지니어링(주)
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Priority to KR1020120054602A priority Critical patent/KR101180466B1/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G9/00—Installations of electric cables or lines in or on the ground or water
    • H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
    • H02G9/065—Longitudinally split tubes or conduits therefor
    • 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
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/56—Couplings of the quick-acting type for double-walled or multi-channel pipes or pipe assemblies
    • 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
    • F16L7/00—Supporting of pipes or cables inside other pipes or sleeves, e.g. for enabling pipes or cables to be inserted or withdrawn from under roads or railways without interruption of traffic
    • F16L7/02—Supporting of pipes or cables inside other pipes or sleeves, e.g. for enabling pipes or cables to be inserted or withdrawn from under roads or railways without interruption of traffic and sealing the pipes or cables inside the other pipes, cables or sleeves
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G9/00—Installations of electric cables or lines in or on the ground or water
    • H02G9/02—Installations of electric cables or lines in or on the ground or water laid directly in or on the ground, river-bed or sea-bottom; Coverings therefor, e.g. tile
    • H02G9/025—Coverings therefor, e.g. tile

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

PURPOSE: An insulating pipe for protecting an underground transmission line is provided to safely protect the underground transmission line from an external force by simply improving a structure. CONSTITUTION: A cylindrical transmission line holding pipe(110) is made of a synthetic resin. A plurality of drain holes(210) is formed on the lower section of a protection pipe(200). A support piece(310) is installed in the protection pipe. A support rod(320) respectively passes through the four side of the protection pipe. A finished piece(330) is fixed to the end of the support rod passing through a stretchable piece(400). A buffer spring(340) provides elasticity to the stretchable piece.

Description

지중송전선 보호용 절연관{INSULATING PIPE FOR PROTECTION OF UNDERGROUND TRANSMISSION LINE}Insulation pipe for underground transmission line protection {INSULATING PIPE FOR PROTECTION OF UNDERGROUND TRANSMISSION LINE}

본 발명은 지중송전선 보호용 절연관에 관한 것으로, 보다 상세하게는 지중에 매설된 절연관을 외력으로부터 안전하게 보호할 수 있도록 개선된 지중송전선 보호용 절연관에 관한 것이다.
The present invention relates to an insulated tube for protecting underground transmission lines, and more particularly, to an insulated tube for protecting underground transmission lines improved to safely protect an insulated tube embedded in the ground from external force.

일반적으로, 주택가 또는 공업단지에 전력을 공급하기 위하여 지중에 관을 매설하고 그 내부에 송전선을 배선하게 되는데, 이는 지중송전선의 노출을 최소화하여 외부간섭으로부터 지중송전선의 파손을 미연에 방지할 수 있는 장점이 있어 이와 같이 지중에 매설하는 것이다.In general, in order to supply electric power to residential districts or industrial complexes, pipes are embedded in underground and wired transmission lines therein, which minimizes the exposure of underground transmission lines to prevent damage of underground transmission lines from external interference. There is an advantage in this way buried underground.

하지만, 상기와 같은 관은 매립된 상태로 일정기간이 경과 하면 우수 또는 오수에 의해 외면이 부식되거나 또는 여러 외부적인 요인에 의해 자체 파손이 발생하게 되는데, 유지 및 보수를 위해 매설된 관을 외부로 노출되도록 굴착작업을 통해 보수작업 및 교체작업을 시행하게 된다.However, if the above pipe is buried in a certain period of time, the exterior surface is corroded by rainwater or sewage, or self-damage occurs due to various external factors. Repair work and replacement work are carried out through excavation work to be exposed.

상기 굴착작업은 통상의 굴삭기(포크레인)을 이용하여 신속하고 용이하게 지중에 매설된 관을 외부로 인출할 수 있게 되는데, 이때 굴삭기의 버킷(포크레인 삽)이 지중으로 들어오는 과정에 송전선을 수용하고 있는 관의 외면을 타격하여 관에 균열을 발생시키는 문제가 있었다.The excavation work can be quickly and easily withdraw the pipe buried underground by using a conventional excavator (fork crane), in which the bucket (fork crane shovel) of the excavator accommodates the transmission line in the process of entering the ground There was a problem of causing a crack in the tube by hitting the outer surface of the tube.

이를 개선하기 위한 일예로, 등록특허 제1047143호를 들 수 있다.As an example to improve this, there is a registered Patent No. 1047143.

그런데, 개시된 등록특허는 구조가 복잡하고, 구성이 다대하여 설치 효율이 떨어지고, 비용이 증대되는 단점이 있다.
However, the disclosed patent has a disadvantage in that the structure is complicated, the configuration is large, the installation efficiency is low, and the cost is increased.

본 발명은 상술한 바와 같은 종래 기술상의 제반 문제들을 감안하여 이를 손쉽게 해결할 수 있도록 창출된 것으로, 아주 간단한 구조 개선을 통해 지중에 매설된 절연관을 외력으로부터 안전하게 보호할 수 있도록 한 지중송전선 보호용 절연관을 제공함에 그 주된 목적이 있다.
The present invention was created to easily solve in view of the above-mentioned problems in the prior art as described above, the insulation tube for underground transmission line protection to safely protect the insulation tube embedded in the ground from external forces through a very simple structure improvement Its main purpose is to provide

본 발명은 상기한 목적을 달성하기 위한 수단으로, 지중송전선이 내장 배선되고, 합성수지로 제조된 원통형상의 송전선수용; 상기 송전선수용관이 삽입되고, 합성수지로 제조된 사각형상의 보호관; 상기 보호관의 하단면에 형성된 복수의 배수공; 상기 보호관의 네 변에서 각각 상기 송전선수용관의 외주면에 밀착되도록 대응되는 곡률을 갖고 보호관의 내부에 설치된 지지편; 상기 지지편으로부터 연장되고 상기 보호관의 네 변을 각각 관통하며, 보호관의 길이방향을 따라 간격을 두고 다수 구비된 지지로드; 상기 지지로드가 관통되고, 상기 보호관이 네 변을 각각 커버하도록 상부로 볼록한 호형상을 갖되 호 방향으로 물결무늬 형태의 요철이 형성되며, 고무로 제조되고, 상기 지지로드가 관통된 신축편; 상기 신축편을 관통한 지지로드의 단부에 고정되되, 지지로드의 직경보다 크게 형성되며, 신축편의 곡률에 맞춰 라운드 가공된 마감편; 상기 지지로드에 끼워지되, 일단은 상기 신축편의 내주면에 걸림되고, 타단은 상기 보호관의 네 변에 걸림되어 상기 신축편에 탄성을 제공하는 완충스프링;을 포함하여 구성되는 것을 특징으로 하는 지중송전선 보호용 절연관을 제공한다.
The present invention is a means for achieving the above object, the underground power transmission line is built-in wiring, for the cylindrical transmission liner made of synthetic resin; A square protective tube inserted into the power transmission player tube and made of synthetic resin; A plurality of drain holes formed on the lower surface of the protective tube; Support pieces installed in the inner side of the protective tube having a curvature corresponding to each of the four sides of the protective tube in close contact with the outer peripheral surface of the power transmission player tube; Support rods extending from the support piece and penetrating four sides of the protective tube, respectively, having a plurality of intervals along the longitudinal direction of the protective tube; The support rod penetrates, the protective tube has an arc shape convex upwards to cover the four sides, respectively, is formed in a wavy pattern irregularities in the arc direction, made of rubber, the elastic rod penetrated the support rod; A finishing piece fixed to an end portion of the support rod penetrating the elastic piece and formed to be larger than the diameter of the supporting rod and rounded to fit the curvature of the elastic piece; Is inserted into the support rod, one end is caught on the inner peripheral surface of the elastic piece, the other end is caught on the four sides of the protective tube to provide elasticity to the elastic piece; underground transmission line protection for comprising a Provide an insulated tube.

본 발명에 따르면, 외력이 작용하여 타격이나 충돌이 발생할 때 탄성변형되면서 이를 완충 흡수함으로써 내장된 지중송전선을 안전하게 보호하는 효과를 얻을 수 있다.
According to the present invention, it is possible to obtain the effect of safely protecting the built-in underground transmission line by absorbing the buffer while the elastic deformation when the impact or impact occurs due to the external force is applied.

도 1은 본 발명에 따른 지중송전선 보호용 절연관의 예시적인 사시도이다.
도 2는 본 발명에 따른 지중송전선 보호용 절연관의 예시적인 단면도이다.1 is an exemplary perspective view of an insulated tube for protecting underground power lines according to the present invention.
2 is an exemplary cross-sectional view of the insulated tube for protecting the underground transmission line according to the present invention.

이하에서는, 첨부도면을 참고하여 본 발명에 따른 바람직한 실시예를 보다 상세하게 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명 설명에 앞서, 이하의 특정한 구조 내지 기능적 설명들은 단지 본 발명의 개념에 따른 실시예를 설명하기 위한 목적으로 예시된 것으로, 본 발명의 개념에 따른 실시예들은 다양한 형태로 실시될 수 있으며, 본 명세서에 설명된 실시예들에 한정되는 것으로 해석되어서는 아니된다.Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

또한, 본 발명의 개념에 따른 실시예는 다양한 변경을 가할 수 있고 여러 가지 형태를 가질 수 있으므로, 특정 실시예들은 도면에 예시하고 본 명세서에 상세하게 설명하고자 한다. 그러나, 이는 본 발명의 개념에 따른 실시예들을 특정한 개시 형태에 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경물, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다.In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

도 1 및 도 2에 도시된 바와 같이, 본 발명에 따른 지중송전선 보호용 절연관은 지중송전선(100)을 수납하는 송전선수용관(110)을 포함한다.As shown in Figures 1 and 2, the underground transmission line protection insulated tube according to the present invention includes a transmission line for receiving tube 110 for receiving the underground transmission line (100).

상기 송전선수용관(110)은 원통형상을 갖는 합성수지관이다.The power transmission player pipe 110 is a synthetic resin tube having a cylindrical shape.

그리고, 상기 송전선수용관(110)에는 다수의 지중송전선(100)이 수납된다.In addition, a plurality of underground power transmission lines 100 are accommodated in the power transmission player tube 110.

아울러, 상기 송전선수용관(110)은 보호관(200)에 수용된 상태로 보호된다.In addition, the power transmission player tube 110 is protected in a state accommodated in the protective tube (200).

상기 보호관(200)은 사각형상의 관체로서, 상기 송전선수용관(110)과 동일한 재질인 합성수지로 제조된다.The protective tube 200 is a rectangular tube, made of a synthetic resin of the same material as the power transmission player tube (110).

또한, 상기 보호관(200)의 하단면에는 복수의 배수공(210)이 천공 형성된다.In addition, a plurality of drain holes 210 are formed in the bottom surface of the protective tube 200.

상기 배수공(210)은 예기치 못한 상황에 의해 상기 보호관(200) 내부로 물이 유입되었을 때 이를 신속히 배출하여 송전선수용관(110) 내부에 내장된 지중송전선(100)에 영향을 미치지 못하도록 하기 위함이다.The drain hole 210 is to prevent the impact on the underground transmission line 100 embedded in the power transmission player pipe 110 by discharging it quickly when water is introduced into the protection tube 200 due to an unexpected situation. .

뿐만 아니라, 상기 송전선수용관(110)은 그 곡률에 대응되는 호형상의 지지편(310)에 의해 밀착된 상태로 상기 보호관(200) 내부에서 유동되지 않게 고정된다.In addition, the power transmission player tube 110 is fixed not to flow in the protective tube 200 in a state of being in close contact by the arc-shaped support piece 310 corresponding to the curvature.

이를 위해, 상기 지지편(310)은 상기 보호관(200)의 네 변을 관통한 후 내부로 노출되게 배치된다.To this end, the support piece 310 is disposed to pass through the four sides of the protective tube 200 to be exposed to the inside.

그리고, 상기 지지편(310)에는 지지로드(320)가 일체로 돌출되는데, 상기 지지로드(320)는 신축편(400)을 관통하여 외부로 노출된다.In addition, the support rod 320 is integrally protruded from the support piece 310, and the support rod 320 penetrates the stretchable piece 400 and is exposed to the outside.

이 경우, 상기 신축편(400)은 원을 대략 4등분한 형태의 호 형상을 갖는 부재로서, 상기 보호관(200)의 네 변을 각각 볼록하게 커버한다.In this case, the expansion and contraction piece 400 is a member having an arc shape in which the circle is roughly divided into four, and convexly covers four sides of the protective tube 200.

특히, 상기 신축편(400)은 설치시 상기 보호관(200)과 일정 간격을 두고 설치되는 것이 중요한데, 이는 외력이 가해졌을 때 유동과 동시에 탄성변형되면서 충격을 흡수할 수 있도록 구성하기 위함이다.In particular, it is important that the stretched piece 400 is installed at a predetermined interval with the protective tube 200 when installed, which is intended to be configured to absorb shock while elastically deformed at the same time when the external force is applied.

이때, 상기 신축편(400)은 도 1의 변형예와 같이, 폭방향으로 물결무늬 형상의 요철을 갖도록 함으로써 자체적으로 신축성을 극대화시킴이 더욱 바람직하다.At this time, the elastic piece 400 is more preferred to maximize the elasticity by itself to have a wavy pattern irregularities in the width direction, as in the modification of FIG.

뿐만 아니라, 상기 지지로드(320)는 보호관(200)의 길이방향으로 일정간격을 두고 다수개 구비되며, 신축편(400)을 관통한 신축편(400)의 상면에서는 신축편(400)의 곡률에 맞춰 제작된 마감편(330)에 의해 마감된다.In addition, the support rod 320 is provided in plurality in a longitudinal direction in the longitudinal direction of the protective tube 200, the curvature of the expansion and contraction piece 400 on the upper surface of the expansion and contraction piece 400 penetrating the expansion and contraction piece 400 Finished by a finish piece 330 made to fit.

상기 마감편(330)은 단순 마감 기능 외에 상기 지지로드(320)가 돌출되기 위해 신축편(400)에 형성된 구멍을 밀폐하여 우수의 침투를 차단하는 기능도 수행한다.In addition to the simple finishing function, the finishing piece 330 seals a hole formed in the stretchable piece 400 so that the support rod 320 protrudes, and also blocks the penetration of rainwater.

때문에, 상기 마감편(330)은 상기 지지로드(320)의 직경보다 크게 형성되어야 한다.Therefore, the finishing piece 330 should be formed larger than the diameter of the support rod 320.

그리고, 상기 지지로드(320)에는 완충스프링(340)이 끼워지며, 상기 완충스프링(340)의 일단은 상기 신축편(400)의 내주면에 지지되고, 타단은 상기 보호관(200)의 외주면에 지지된다.In addition, the support rod 320 is fitted with a buffer spring 340, one end of the buffer spring 340 is supported on the inner peripheral surface of the expansion and contraction piece 400, the other end is supported on the outer peripheral surface of the protective tube 200 do.

따라서, 상기 신축편(400)은 자체 신축 기능 및 완충스프링(340)에 의한 탄성완충 기능 등 적어도 1,2차에 걸친 완충기능을 수행할 수 있게 된다.Therefore, the expansion and contraction piece 400 can perform a cushioning function for at least one and two orders, such as a self-expanding function and an elastic buffer function by the buffer spring 340.

또한, 상기 신축편(400)은 고무재질로 형성되기 때문에 신축력이 배가되며, 외력에 의해 압축되었을 때 양단이 보호관(200)의 상면과 접하는 순간 볼록하게 튀어나온 상부 부분이 변형되면서 또다시 충격을 흡수하게 되므로 사실상 외력이 가해졌을 때 내장된 지중송전선(100)이 파손되거나 단락되는 일은 거의 발생하지 않게 된다.In addition, since the elastic piece 400 is made of a rubber material, the elastic force is doubled, and when compressed by external force, the upper part protrudes convexly when the both ends contact with the upper surface of the protective tube 200, thereby deforming the impact. Since it is absorbed virtually when the external force is applied, the built-in underground transmission line 100 is rarely broken or short-circuited.

아울러, 상기 신축편(400)을 포함한 상기 보호관(200)은 일정 길이별로 군데 군데 설치될 수 있다.In addition, the protective tube 200 including the stretchable piece 400 may be installed in several places by a predetermined length.

이와 같이, 본 발명에 따른 지중송전선 보호용 절연관은 적어도 2중, 최대 3중에 걸친 충격 흡수 구조를 갖추고 있기 때문에 포크레인 등의 굴삭기 작업시 쉽게 파손되거나 손상되지 않아 지중송전선을 보다 안전하게 보호하게 된다.
As such, the insulation tube for protecting the underground transmission line according to the present invention has a shock absorbing structure for at least double and up to three times, so that it is not easily broken or damaged during an excavator operation such as a fork-lane, thereby protecting the underground transmission line more safely.

100 : 지중송전선 110 : 송전선수용관
200 : 보호관 210 : 배수공
310 : 지지편 320 : 지지로드
330 : 마감편 340 : 완충스프링
400 : 신축편100: underground transmission line 110: transmission liner
200: protective tube 210: drain hole
310: support piece 320: support rod
330: finishing piece 340: buffer spring
400: stretch

Claims (1)

지중송전선(100)이 내장 배선되고, 합성수지로 제조된 원통형상의 송전선수용관(110);
상기 송전선수용관(110)이 삽입되고, 합성수지로 제조된 사각형상의 보호관(200);
상기 보호관(200)의 하단면에 형성된 복수의 배수공(210);
상기 보호관(200)의 네 변에서 각각 상기 송전선수용관(110)의 외주면에 밀착되도록 대응되는 곡률을 갖고 보호관(200)의 내부에 설치된 지지편(310);
상기 지지편(310)으로부터 연장되고 상기 보호관(200)의 네 변을 각각 관통하며, 보호관(200)의 길이방향을 따라 간격을 두고 다수 구비된 지지로드(320);
상기 지지로드(320)가 관통되고, 상기 보호관(200)이 네 변을 각각 커버하도록 상부로 볼록한 호형상을 갖되 호 방향으로 물결무늬 형태의 요철이 형성되며, 고무로 제조되고, 상기 지지로드(320)가 관통된 신축편(400);
상기 신축편(400)을 관통한 지지로드(320)의 단부에 고정되되, 지지로드(320)의 직경보다 크게 형성되며, 신축편(400)의 곡률에 맞춰 라운드 가공된 마감편(330);
상기 지지로드(320)에 끼워지되, 일단은 상기 신축편(400)의 내주면에 걸림되고, 타단은 상기 보호관(200)의 네 변에 걸림되어 상기 신축편(400)에 탄성을 제공하는 완충스프링(340);을 포함하여 구성되는 것을 특징으로 하는 지중송전선 보호용 절연관.Underground transmission line 100 is internally wired, cylindrical transmission line for the first made of synthetic resin 110;
The power transmission player tube 110 is inserted, the rectangular protective tube 200 made of synthetic resin;
A plurality of drain holes 210 formed on the bottom surface of the protective tube 200;
Support pieces 310 installed in the inner side of the protective tube 200 has a curvature corresponding to the four sides of the protective tube 200 in close contact with the outer circumferential surface of the power transmission player tube 110, respectively;
A support rod 320 extending from the support piece 310 and penetrating four sides of the protective tube 200, respectively, and having a plurality of intervals along the longitudinal direction of the protective tube 200;
The support rod 320 is penetrated, and the protective tube 200 has a convex shape that is convex upward to cover four sides, respectively, and a wavy pattern irregularities are formed in the arc direction, and is made of rubber, and the support rod ( Stretch piece 400 is penetrated;
A finishing piece 330 fixed to an end portion of the support rod 320 penetrating the elastic piece 400 and formed larger than the diameter of the support rod 320 and rounded to fit the curvature of the elastic piece 400;
It is fitted to the support rod 320, one end is caught on the inner circumferential surface of the expansion and contraction piece 400, the other end is caught on four sides of the protective tube 200 to provide an elastic spring to the elastic piece 400 Insulation tube for underground power line protection, characterized in that it comprises a.
KR1020120054602A 2012-05-23 2012-05-23 Insulating pipe for protection of underground transmission line KR101180466B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101217847B1 (en) 2012-09-12 2013-01-09 주식회사 부흥기술단 Insulating pipe for protecting underground transmission line
KR101402992B1 (en) 2014-01-03 2014-06-03 (주) 세화 Protection pipe for insulation mounting an underground line
KR101440140B1 (en) 2014-06-30 2014-09-12 김동조 Protecting tube for distribution line in underground
CN108479901A (en) * 2018-03-22 2018-09-04 辽宁三三工业有限公司 Slurry balance shield crusher machine machine hydraulic tube protective device
CN113131419A (en) * 2021-05-28 2021-07-16 国网河南省电力公司西峡县供电公司 Safety protection device for underground cable laying

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100736833B1 (en) 2007-01-30 2007-07-10 (주)하나전력기술단 Protection installation structure of underground power cable

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100736833B1 (en) 2007-01-30 2007-07-10 (주)하나전력기술단 Protection installation structure of underground power cable

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101217847B1 (en) 2012-09-12 2013-01-09 주식회사 부흥기술단 Insulating pipe for protecting underground transmission line
KR101402992B1 (en) 2014-01-03 2014-06-03 (주) 세화 Protection pipe for insulation mounting an underground line
KR101440140B1 (en) 2014-06-30 2014-09-12 김동조 Protecting tube for distribution line in underground
CN108479901A (en) * 2018-03-22 2018-09-04 辽宁三三工业有限公司 Slurry balance shield crusher machine machine hydraulic tube protective device
CN108479901B (en) * 2018-03-22 2024-04-26 辽宁三三工业有限公司 Hydraulic pipe protection device for slurry balance shield machine crusher
CN113131419A (en) * 2021-05-28 2021-07-16 国网河南省电力公司西峡县供电公司 Safety protection device for underground cable laying

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