KR101978971B1 - Protection pipe for subterranean electric power supply - Google Patents

Protection pipe for subterranean electric power supply Download PDF

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Publication number
KR101978971B1
KR101978971B1 KR1020180151571A KR20180151571A KR101978971B1 KR 101978971 B1 KR101978971 B1 KR 101978971B1 KR 1020180151571 A KR1020180151571 A KR 1020180151571A KR 20180151571 A KR20180151571 A KR 20180151571A KR 101978971 B1 KR101978971 B1 KR 101978971B1
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South Korea
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welding
silver
flange portion
flange
welded
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KR1020180151571A
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Korean (ko)
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김현석
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김현석
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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
    • 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
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
    • F16L1/06—Accessories therefor, e.g. anchors
    • F16L1/11—Accessories therefor, e.g. anchors for the detection or protection of pipes in the ground

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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

The present invention relates to a cable protection pipe for underground power distribution and, more specifically, to a cable protection pipe for underground power distribution in which a flange is welded to secure high airtightness. The cable protection pipe for underground power distribution is formed with a body and a flange unit which are welded to each other by using silver solder containing at least 30% of silver (Ag) from whole elements. A first welding unit and a second welding unit are individually formed to be welded on a boundary of the body and a contact part of the flange unit. An insertion groove into which a silver solder wire is inserted is formed on an internal surface of the flange unit which is in contact with the body. A third welding unit is formed between the first welding unit and the second welding unit by melting the silver solder wire by welding heat generated by the welding on the boundary of the body and the contact part of the flange unit.

Description

지중배전용 케이블 보호관{Protection pipe for subterranean electric power supply}{Protection pipe for subterranean electric power supply}

본 발명은 지중배전용 케이블 보호관에 관한 것으로서, 보다 상세하게는 높은 기밀성이 확보되도록 플랜지가 용접결합된 지중배전용 케이블 보호관에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cable protective pipe for underground distribution, and more particularly, to a cable protective pipe for underground distribution where a flange is welded to secure high airtightness.

일반적으로 전력을 수송하는 지중 선로용 초고압 케이블을 접속하는 접속재의 보호관은 방수, 방식(防蝕), 기밀 등의 기계적, 물리적 특성이 요구되는 주요 부품으로 원 소재는 동관과 플랜지(flange)로 구성되어 있고, 사용되는 전압에 따라 동관의 내경 크기는 각각 다르다.Generally, the protection pipe of the connection material that connects the ultra-high voltage cable for the underground line that transports electric power is a main part requiring mechanical and physical characteristics such as waterproofing, corrosion protection and airtightness. The original material is composed of copper pipe and flange And the inner diameter of the copper tube varies depending on the voltage used.

전력케이블 간의 접속은 양쪽 전력케이블의 중심에 내장된 도체를 노출시키고 양쪽 전력케이블의 도체를 서로 전기적으로 연결시키는 부품을 통해 연결시킨 후, 송배전되는 전력용량에 따라 절연파괴가 발생하지 않도록 에폭시, 절연지, 고무 등으로 이루어진 절연부품들을 삽입한다.The connection between the power cables is achieved by exposing the conductors embedded in the center of both power cables and connecting the conductors of both power cables to each other through electrical connecting parts, , Rubber, and so on.

전력케이블의 접속이 완료되면 최종적으로 접속부분을 보호하며 전력케이블의 금속시스와 같은 역할을 하는 보호관이 양쪽에 접속된다. 이러한 보호관은 한쪽은 전력케이블의 금속시스와 납연공 작업에 의해 서로 연결되고, 다른 쪽은 보호관끼리 서로 접속된다. 보호관은 전력케이블의 금속시스와 같은 기능을 하므로 전기전도도가 우수한 동재질로 이루어진다.When the connection of the power cable is completed, a protective pipe that acts as a metal sheath of the power cable is finally connected to both sides. One of these protective pipes is connected to each other by the metal sheath of the power cable and the lead pipe is connected to the other, and the protective pipes are connected to each other. The protection tube is made of a copper material with excellent electrical conductivity because it functions like a metal sheath of a power cable.

한편, 초고압 전력케이블용 접속함은 그 내부에 보강되는 절연부품의 크기에 따라 그 외경의 크기가 달라질 수 밖에 없고, 케이블의 접속부분 전체에 있어 중심부는 절연부품의 영향으로 그 외경이 크고 양쪽 케이블단으로 갈수록 절연부품이 적게 접속되므로 그 외경이 작게 된다. 따라서 보호관 역시 내부에 접속되는 절연부품의 크기에 따라 외경이 다르게 형성된다.On the other hand, the connection box for the ultra-high voltage power cable has a different outer diameter depending on the size of the insulated component to be reinforced therein. In the connection portion of the cable, the outer portion is large due to the influence of the insulating parts, Since the insulating parts are less connected to the end, the outer diameter becomes smaller. Therefore, the outer diameter of the protective pipe is also different depending on the size of the insulated part connected to the inside.

이러한 이유로 서로 다른 외경을 갖는 보호관이 프랜지 결합에 의해 볼트 체결되는 형상을 갖는다.For this reason, the protective pipe having different outer diameters has a shape to be bolted by the flange joint.

도 1은 종래의 초고압케이블의 절연접속함을 나타낸 도면이다.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an insulation connection box of a conventional ultra-high voltage cable. FIG.

도 1에 도시된 바와 같이, 전력케이블(120a, 120b)의 양단은 도체간에 도체슬리브라는 접속재를 사용하여 접속이 이루어지고, 그 위에는 전계완화를 목적으로 절연보강재들이 접속된다.As shown in FIG. 1, both ends of the power cables 120a and 120b are connected to each other by using a connection material called a conductor sleeve between the conductors, and insulation reinforcements are connected thereon for the purpose of electric field relaxation.

절연보강재들의 접속이 완료된 후에는 그 위에 양측의 보호관(130a, 130b)이 절연통(110)을 매개로 체결된다.After the connection of the insulated reinforcements is completed, the protective pipes 130a and 130b on both sides are fastened thereon via the insulating cylinder 110. [

보호관(130a, 130b)의 체결은 플랜지(150a, 150b)를 매개로 하여 절연통(110)의 탭에 볼트로 조이게 된다.The fastening of the protective pipes 130a and 130b is bolted to the tabs of the insulating cylinder 110 via the flanges 150a and 150b.

이러한 종래의 보호관은 좌우 보호관에 금속재질(동합금 재질)의 플랜지를 용접 등에 의해 접합시킨 후 양쪽 플랜지를 서로 맞물리도록 하여 볼트 등으로 체결하는 방식을 사용한다.Such a conventional protection pipe is formed by joining flanges of a metal material (copper alloy material) to the right and left protection pipes by welding or the like, and then fastening the flanges with bolts or the like so that both flanges are engaged with each other.

이와 같이 플랜지에 의해 체결되는 보호관의 내부에는 절연유 또는 절연가스가 충전되기 때문에 높은 기밀성이 요구된다. 따라서 플랜지의 용접이 매우 중요하다. 그리고 용접부분은 전기전도도가 낮으면 저항으로 작용하여 열이 발생하기 때문에 용접을 할 때 전기전도도가 높은 금속재료를 사용할 필요가 있다. 그러나 전기전도도가 높은 금속은 그 함유량이 많아질 수록 비용이 급격히 증가하기 때문에 사용하는데 어려움이 있다.Since the insulating pipe or the insulating gas is filled in the protective pipe fastened by the flange, high airtightness is required. Therefore welding of the flange is very important. In addition, since the welding part generates a heat by acting as a resistance when the electric conductivity is low, it is necessary to use a metal material having high electric conductivity when welding. However, it is difficult to use a metal having a high electrical conductivity because its cost increases sharply as its content increases.

대한민국 등록특허공보 제10-1365186호(2014.02.21.)Korean Registered Patent No. 10-1365186 (Feb. 21, 2014) 대한민국 등록특허공보 제10-1181265호(2012.09.10.)Korean Registered Patent No. 10-1181265 (September 10, 2012)

본 발명은 전술한 문제점을 해결하기 위한 것으로서, 플랜지 용접부분의 기밀성이 우수하고, 용접부분의 전기전도도를 높이면서 비용상승을 최소화할 수 있는 지중배전용 케이블 보호관을 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION It is an object of the present invention to provide an underground cable protection tube which is excellent in airtightness of a welded portion of a flange and can minimize an increase in cost while increasing the electrical conductivity of a welded portion.

상기 목적을 달성하기 위하여 본 발명의 지중배전용 케이블 보호관은, 전체 성분 중 은(Ag)이 적어도 30% 함유된 은납을 이용하여 용접결합되는 관체와 플랜지부로 이루어지고, 상기 관체와 플랜지부의 접촉부분의 경계에는 용접이 이루어져 제1 용접부 및 제2 용접부가 각각 형성되며, 상기 관체와 접촉하는 상기 플랜지부의 내측면에는 은납 와이어가 삽입되는 삽입홈이 형성되고, 상기 관체와 플랜지부의 접촉부분의 경계에 용접이 실시됨에 따라 발생하는 용접열에 의해 상기 은납 와이어가 용융되어 상기 제1 용접부와 제2 용접부 사이에 제3 용접부가 형성된다.In order to attain the above object, the underwater distribution cable protection pipe of the present invention comprises a tube body and a flange portion which are welded to each other using silver solder containing at least 30% of silver (Ag) Wherein a first welding portion and a second welding portion are respectively formed by welding at the boundary of the contact portion and an insertion groove into which the silver wire is inserted is formed on the inner side surface of the flange portion which is in contact with the tube, The soldering wire is melted by the welding heat generated as a result of the welding at the boundary between the first welding portion and the second welding portion, thereby forming the third welding portion between the first welding portion and the second welding portion.

그리고 상기 플랜지부의 내측에는 상기 관체의 단부와 접촉하는 걸림턱이 형성되고, 상기 제1 용접부는 상기 걸림턱을 경계로 상기 관체와 플랜지부의 내측에 형성되며, 상기 제2 용접부는 상기 관체와 플랜지부의 외측에 형성된다.And the flange portion is formed with an engagement protrusion that is in contact with an end of the tube body, the first weld portion is formed on the inner side of the tube body and the flange portion with the engagement protrusion as a boundary, And is formed outside the flange portion.

그리고 상기 삽입홈에는 레이저빔을 조사하여 깊이 50㎛의 요철을 형성하고, 상기 레이저빔의 조사량은 1~12mJ/㎠이다.The insertion groove is irradiated with a laser beam to form a concavo-convex depth of 50 mu m, and the irradiation amount of the laser beam is 1 to 12 mJ / cm2.

그리고 상기 삽입홈에는 에칭액을 이용하여 산곡 평균 간격(RSm)이 50~150㎛, 최대 높이(Rz)가 2~35㎛의 표면 거칠기를 갖는 요철이 형성된다.The insertion grooves are formed with irregularities having a surface roughness of 50 to 150 μm and a maximum height (Rz) of 2 to 35 μm using the etching solution.

본 발명의 지중배전용 케이블 보호관은 관체와 플랜지부의 외부 경계부분을 용접하여 제1 용접부와 제2 용접부를 형성하고, 제1 용접부와 제2 용접부가 형성될 때 발생하는 용접열을 이용하여 제1 용접부와 제2 용접부 사이에 제3 용접부가 형성되도록 함으로써, 플랜지 용접부분의 기밀성이 우수하고, 용접부분의 전기전도도를 높이면서 비용상승을 최소화할 수 있다.The underground distribution cable protection pipe of the present invention is formed by welding the outer boundary portion of the pipe body and the flange portion to form the first welding portion and the second welding portion, and by using the welding heat generated when the first welding portion and the second welding portion are formed, The third welded portion is formed between the first welded portion and the second welded portion, so that the airtightness of the welded portion of the flanged portion is excellent, and the increase in the electrical conductivity of the welded portion and the increase in cost can be minimized.

도 1은 종래의 초고압케이블의 절연접속함을 나타낸 도면.
도 2는 본 발명의 실시예에 따른 지중배전용 케이블 보호관의 사시도.
도 3은 본 발명의 실시예에 따른 지중배전용 케이블 보호관의 단면도.
도 4는 본 발명의 실시예에 따른 은납 와이어가 삽입되는 삽입홈을 확대하여 나타낸 도면.
도 5는 본 발명의 다른 실시예에 따른 은납 와이어가 삽입되는 삽입홈을 확대하여 나타낸 도면.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an insulation connection box of a conventional ultra-high voltage cable. FIG.
FIG. 2 is a perspective view of a protection cable for underwater distribution cables according to an embodiment of the present invention; FIG.
3 is a sectional view of a protection cable for underwater distribution cables according to an embodiment of the present invention;
4 is an enlarged view of an insertion groove into which a silver wire is inserted according to an embodiment of the present invention.
5 is an enlarged view of an insertion groove into which a silver wire is inserted according to another embodiment of the present invention.

이하, 첨부된 도면을 참조하여 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 2(a)는 결합전 관체와 플랜지부를 나타낸 사시도이고, 도 2(b)는 결합 후 관체와 플랜지부를 나타낸 사시도이다. 도 3은 서로 결합된 관체와 플랜지부의 단면도로서, 용접부분을 확대하여 함께 표시하였다. 도 4는 제3 용접부를 보여주기 위하여 삽입홈 부분만을 확대하여 나타낸 도면이다. 단, 제3 용접부는 은납 와이어가 용융된 형태로서 발명의 이해를 돕기 위해 그 형상을 개략적으로 나타내었으며, 실제 은납 와이어가 용융된 형태와 예시의 도면에 나타난 제3 용접부의 형태는 다를 수 있다.FIG. 2 (a) is a perspective view showing a tubular body before the coupling and a flange, and FIG. 2 (b) is a perspective view showing the tubular body and the flange after the coupling. Fig. 3 is a cross-sectional view of the tube and the flange coupled to each other. 4 is an enlarged view showing only an insertion groove portion to show a third welded portion. However, the shape of the third welding portion is schematically shown in order to facilitate the understanding of the invention as a form in which the silver wire is melted. The shape of the actual welding wire melted and the shape of the third welding portion shown in the illustrative drawing may be different.

제1 실시예First Embodiment

본 발명의 제1 실시예에 따른 지중배전용 케이블 보호관은 관체(10)와 플랜지부(20)로 이루어지는 것으로서, 도 2 내지 도 3에 도시된 바와 같이 관체(10)와 플랜지부(20)를 용접하여 일체로 형성한다.2 to 3, the tube 10 and the flange portion 20 are connected to each other through the pipe 10 and the flange portion 20, And is integrally formed by welding.

관체(10)는 원통형상으로 형성되고, 어느 일단에 플랜지부(20)가 용접된다. 그리고 관체(10)의 타단은 직경이 점점 작아지는 형태로 형성된다.The tubular body 10 is formed into a cylindrical shape, and the flange portion 20 is welded to either end. The other end of the tube 10 is formed in such a shape that its diameter gradually decreases.

플랜지부(20)는 링(ring) 형상으로 형성되고, 내측에 걸림턱(21)이 형성된다. 걸림턱(21)에는 관체(10)의 일단이 닿아 관체(10)와 플랜지부(20)가 결합된다. 그리고 관체(10)와 플랜지부(20)를 결합시킬 때 관체(10)와 접촉하는 플랜지부(20)의 내측면에는 은납 와이어(30)가 삽입되는 삽입홈(22)이 형성된다. 삽입홈(22)은 플랜지부(20)의 내측 둘레를 따라 형성된다. 은납 와이어(30)는 관체(10)와 플랜지부(20)를 용접시키기 위한 은납과 동일한 성분으로 이루어진다.The flange portion 20 is formed in a ring shape, and a locking protrusion 21 is formed inside. One end of the tubular body 10 is brought into contact with the engaging jaw 21 so that the tubular body 10 and the flange portion 20 are engaged with each other. An insertion groove 22 into which the silver wire 30 is inserted is formed on the inner side surface of the flange portion 20 which contacts the tubular body 10 when the tubular body 10 and the flange portion 20 are joined. The insertion groove 22 is formed along the inner periphery of the flange portion 20. The silver wire 30 is composed of the same components as the silver braid for welding the tube 10 and the flange portion 20.

전술한 바와 같이, 관체(10)의 일단이 플랜지부(20)의 내측으로 삽입되어 걸림턱(21)에 닿아 서로 결합된다. 이때, 걸림턱(21)을 경계로 관체(10)와 플랜지부(20)의 내측에 용접을 실시하여 제1 용접부(W1)가 형성되고, 관체(10)와 플랜지부(20)의 외측에 용접을 실시하여 제2 용접부(W2)가 형성된다.As described above, one end of the tubular body 10 is inserted into the inside of the flange portion 20 and is brought into contact with the engaging jaw 21 to be engaged with each other. At this time, the first welded portion W1 is formed by welding the inside of the tubular body 10 and the flange portion 20 to the boundary of the engaging step 21, and the first welded portion W1 is formed on the outside of the tubular body 10 and the flange portion 20 And the second welded portion W2 is formed by welding.

이와 같이 관체(10)와 플랜지부(20)의 접촉부분의 내외측 경계에 용접이 이루어져 제1 용접부(W1) 및 제2 용접부(W2)가 형성될 때 용접에 의한 용접열이 발생하고, 이러한 용접열이 은납 와이어(30)가 삽입되어 있는 삽입홈(22)으로 전도되어 은납 와이어(30)가 용융된다. 이에 따라 도 4에 도시된 바와 같이, 제1 용접부(W1)와 제2 용접부(W2) 사이에서 은납 와이어(30)가 용융되어 제3 용접부(W3)가 형성된다.When the first and second welding portions W1 and W2 are formed at the inner and outer boundaries of the contact portion between the tubular body 10 and the flange portion 20, welding heat is generated by welding. The welding heat is conducted to the insertion groove 22 into which the silver wire 30 is inserted and the silver wire 30 is melted. Accordingly, as shown in FIG. 4, the soldering wire 30 is melted between the first welding portion W1 and the second welding portion W2 to form the third welding portion W3.

관체(10)와 플랜지부(20)를 용접할 때 이용하는 은납은 전체 성분 중 은(Ag)이 적어도 30% 함유된 은납을 이용한다. 용접에 이용되는 은납은 은의 함유량이 많을수록 용접부분의 전기전도도가 우수하여 보호관의 품질이 향상된다. 은의 함유량의 적으면 용접부분의 전기전도도가 떨어지게 되고, 용접부분이 전기적 저항으로 작용하여 열이 발생하는 문제가 있다.The silver solder used when welding the tube 10 and the flange portion 20 uses silver solder containing at least 30% of silver (Ag) among the entire components. The higher the content of silver in the silver solder used for welding, the better the electrical conductivity of the welded part and the better the quality of the protective pipe. If the content of silver is small, the electrical conductivity of the welded portion is lowered, and the welded portion acts as an electrical resistance, thereby generating heat.

이에 따라 용접부분의 전기전도도를 향상시키기 위하여 용접에 이용되는 은납 중 은의 비율을 높일 필요가 있다. 그러나 이러한 은의 함유량이 많을수록 가격이 증가하기 때문에 은납 중 은의 함유량을 증가시키는데 제약이 있으며, 대체로 은이 46% 함유된 은납을 이용한다.Accordingly, in order to improve the electrical conductivity of the welded portion, it is necessary to increase the ratio of silver in silver solder used for welding. However, as the content of silver increases, the price increases, so there is a restriction to increase the silver content in silver silver, and usually silver silver containing 46% silver is used.

한편, 상술한 바와 같이 삽입홈(22)을 형성하고 삽입홈(22)에 은납 와이어(30)를 삽입하여 용접을 실시함에 따라 제1 용접부(W1)와 제2 용접부(W2)가 형성될 때 발생하는 열을 이용하여 관체(10)와 플랜지부(20)의 경계의 외부가 아닌 내부에서 제3 용접부(W3)가 형성되도록 함으로써, 보호관의 기밀성이 향상될 뿐만 아니라 용접부분의 전기전도도도 우수하다. 따라서 본 발명에 따른 용접구조 및 방법으로 은의 함유량이 30%인 은납을 이용하여 관체(10)와 프레임을 용접할 때 보호관의 기밀성이나 전기전도도는 은의 함유량이 46%인 은납을 이용하여 관체(10)와 플랜지부(20)를 용접할 때와 동일한 품질을 확보할 수 있다.When the first welding portion W1 and the second welding portion W2 are formed by forming the insertion groove 22 and inserting the silver wire 30 into the insertion groove 22 as described above, The third welded portion W3 is formed inside the boundary between the tube 10 and the flange portion 20 using the generated heat so that the airtightness of the protective tube is improved and the electrical conductivity of the welded portion is also excellent Do. Accordingly, when the tube 10 and the frame are welded by using the silver structure having the silver content of 30% by the welding structure and the method according to the present invention, the airtightness and the electric conductivity of the protective tube can be improved by using the silver body having the silver content of 46% And the flange portion 20 are welded to each other.

이에 따라 본 발명은 제조비용을 낮추면서 동일한 품질의 보호관의 제작이 가능하다.Accordingly, the present invention makes it possible to manufacture a protective tube of the same quality while lowering the manufacturing cost.

제2 실시예Second Embodiment

본 발명의 제2 실시예에 따른 지중배전용 케이블 보호관은 관체(10)와 플랜지부(20)로 이루어지는 것으로서, 관체(10)와 플랜지부(20)를 용접하여 일체로 형성한다. 제2 실시예에 따른 관체(10)와 플랜지부(20)는 제1 실시예와 동일하다. 다만, 제2 실시예에서는 은납 와이어(30)가 삽입되는 삽입홈(22)에 요철(23)이 형성된다.The underground distribution cable protection pipe according to the second embodiment of the present invention comprises a tube body 10 and a flange portion 20 and is integrally formed by welding the tube body 10 and the flange portion 20 together. The tubular body 10 and the flange portion 20 according to the second embodiment are the same as those of the first embodiment. However, in the second embodiment, the concave and convex portions 23 are formed in the insertion groove 22 into which the silver wire 30 is inserted.

도 5는 은납 와이어(30)가 삽입되는 삽입홈(22)을 확대하여 나타낸 도면으로, 내측에 요철(23)이 형성된 삽입홈(22)을 나타낸 도면이다.5 is an enlarged view of the insertion groove 22 into which the silver wire 30 is inserted. FIG. 5 is a view showing the insertion groove 22 in which the concave and convex portions 23 are formed inside.

이러한 요철(23)은 삽입홈(22)의 내측 면적을 증가시켜 삽입홈(22)에 삽입되어 있는 은납 와이어(30)로 열전달이 잘 이루어지도록 함으로써 은납 와이어(30)의 용융을 촉진시키고, 은납 와이어(30)가 용융되어 발생하는 은납 와이어(30) 용접 비드가 삽입홈(22)의 내측 표면에 잘 부착되도록 하여 결합력 및 기밀성을 높일 수 있다.This concave and convex 23 increases the inner area of the insertion groove 22 to facilitate the heat transfer to the silver wire 30 inserted in the insertion groove 22 thereby promoting the melting of the silver wire 30, The welding beads of the silver wire 30 generated by melting the wire 30 are adhered to the inner surface of the insertion groove 22 to improve the bonding force and the airtightness.

삽입홈(22)에는 레이저빔을 조사하여 깊이 50㎛의 요철(23)을 형성한다. 이때, 레이저빔의 조사량은 1~12mJ/㎠이다. 레이저빔을 조사할 때 레이저빔의 조사량이 1mJ/㎠ 미만이면 인장강도와 작동파단압을 만족할 수 없고, 레이저 빔의 조사량이 12mJ/㎠를 초과하면 레이저빔이 조사되는 부분의 뒤틀림이나 변형이 발생할 수 있다.The insertion groove 22 is irradiated with a laser beam to form concave and convex portions 23 having a depth of 50 탆. At this time, the irradiation amount of the laser beam is 1 to 12 mJ / cm 2. If the irradiation amount of the laser beam is less than 1 mJ / cm 2 when the laser beam is irradiated, the tensile strength and the operating rupture pressure can not be satisfied. If the irradiation amount of the laser beam exceeds 12 mJ / cm 2, .

구체적으로 레이저빔(입력파워 17W, 효율(%) 95%, 출력파워 16.15W, max frequency 120kHz)을 6.73mJ/㎠으로 조사하여 깊이가 50㎛인 요철(23)을 형성한다.Concretely, irregularities 23 having a depth of 50 탆 are formed by irradiating a laser beam (input power 17 W, efficiency (%) 95%, output power 16.15 W, max frequency 120 kHz) at 6.73 mJ /

제3 실시예Third Embodiment

본 발명의 제3 실시예에 따른 지중배전용 케이블 보호관은 관체(10)와 플랜지부(20)로 이루어지는 것으로서, 관체(10)와 플랜지부(20)를 용접하여 일체로 형성한다. 제3 실시예에 따른 관체(10)와 플랜지부(20)는 제2 실시예와 같이 삽입홈(22)에 요철(23)을 형성한다. 다만, 제3 실시예에서는 에칭액을 이용하여 요철(23)을 형성한다.The underground distribution cable protection pipe according to the third embodiment of the present invention comprises a tube body 10 and a flange portion 20 and is integrally formed by welding the tube body 10 and the flange portion 20 together. The tubular body 10 and the flange portion 20 according to the third embodiment form concave and convex portions 23 in the insertion groove 22 as in the second embodiment. However, in the third embodiment, the unevenness 23 is formed by using the etching solution.

구체적으로 삽입홈(22)에는 화학적 에칭액을 이용하여 산곡 평균 간격(RSm)이 50~150㎛, 최대 높이(Rz)가 2~35㎛의 표면 거칠기를 갖는 요철(23)이 형성된다. 이때, 에칭액으로는 여화제이철액, 질산수용액(농도 15~35%) 등을 이용할 수 있다.Concretely, the concave and convex portions 23 having a surface roughness of 50 to 150 μm and a maximum height (Rz) of 2 to 35 μm are formed in the insertion groove 22 using a chemical etching solution. At this time, as the etching solution, a ferro-silicic acid solution, a nitric acid aqueous solution (concentration: 15 to 35%), etc. can be used.

본 발명에 따른 지중배전용 케이블 보호관은 전술한 실시예에 국한되지 않고 본 발명의 기술사상이 허용되는 범위 내에서 다양하게 변형하여 실시할 수 있다.The underwater distribution cable protection pipe according to the present invention is not limited to the above-described embodiments but can be variously modified and embodied within the scope of the technical idea of the present invention.

10 : 관체,
20 : 플랜지부,
21 : 걸림턱,
22 : 삽입홈,
23 : 요철,
30 : 은납 와이어,10: tube,
20: flange portion,
21: hanging jaw,
22: insert groove,
23: uneven,
30: Silver wire,

Claims (4)

내부에 수용되는 전력케이블을 보호하고 내부 기밀성을 확보하기 위한 지중배전용 케이블 보호관에 있어서,
전체 성분 중 은(Ag)이 적어도 30% 함유된 은납을 이용하여 용접결합되는 원통형상의 관체와 링(ring) 형상의 플랜지부로 이루어지며,
상기 관체와 플랜지부의 접촉부분의 경계에는 용접이 이루어져 내측에 제1 용접부가 형성되고 외측에 제2 용접부가 형성되며,
상기 관체와 접촉하는 상기 플랜지부의 내측면에는 은납 와이어가 삽입되는 삽입홈이 형성되고,
상기 관체와 플랜지부의 접촉부분의 경계에 용접을 실시하여 상기 제1 용접부와 제2 용접부가 형성될 때 발생하는 용접열에 의해 상기 은납 와이어가 용융되어 상기 제1 용접부와 제2 용접부 사이에 제3 용접부가 형성되며,
상기 플랜지부의 내측에는 상기 관체의 단부와 접촉하는 걸림턱이 형성되고,
상기 삽입홈에는 레이저빔을 조사하여 깊이 50㎛의 요철을 형성하며, 상기 레이저빔의 조사량은 1~12mJ/㎠인 것을 특징으로 하는 지중배전용 케이블 보호관.A cable protective pipe for underground distribution for protecting a power cable accommodated in the inside and securing an internal airtightness,
And a ring-shaped flange portion welded and bonded by using silver solder containing at least 30% of silver (Ag)
A first welding portion is formed on the inner side and a second welding portion is formed on the outer side of the flange portion,
An insertion groove into which a silver wire is inserted is formed in an inner side surface of the flange portion which is in contact with the tubular body,
Wherein the silver wire is melted by the welding heat generated when the first welding portion and the second welding portion are formed by performing welding on the boundary of the contact portion of the tube and the flange portion to form the third welding portion between the first welding portion and the second welding portion, A welding portion is formed,
Wherein a flange portion is formed on an inner side of the flange portion,
Wherein the insertion groove is irradiated with a laser beam to form a concavo-convex depth of 50 mu m, and the irradiation amount of the laser beam is 1 to 12 mJ / cm < 2 >. 삭제delete 삭제delete 삭제delete
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KR20220006742A (en) * 2020-07-09 2022-01-18 문재화 Flanged pipe for fluid of high pressure
KR20220068074A (en) * 2020-11-18 2022-05-25 (주)브이월드코리아 Flange pipe for fluid of high pressure of which leaking test is easy at site

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Publication number Priority date Publication date Assignee Title
KR950027954U (en) * 1994-03-22 1995-10-18 조주현 Copper Pipe Splicer with Copper Lead
JPH0831279A (en) * 1994-05-12 1996-02-02 Toshiba Corp Vacuum valve and manufacture thereof
KR970007108Y1 (en) * 1994-07-25 1997-07-16 손병학 Plate for roaster
KR101181265B1 (en) 2010-10-15 2012-09-10 (주)원컨덕터 Protection case for joint box of ultra high voltage power cable
KR101365186B1 (en) 2012-07-06 2014-02-21 (주)원컨덕터 Outer case for power cable joint box formed by reducing and expanding diameter of pipe

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KR950027954U (en) * 1994-03-22 1995-10-18 조주현 Copper Pipe Splicer with Copper Lead
JPH0831279A (en) * 1994-05-12 1996-02-02 Toshiba Corp Vacuum valve and manufacture thereof
KR970007108Y1 (en) * 1994-07-25 1997-07-16 손병학 Plate for roaster
KR101181265B1 (en) 2010-10-15 2012-09-10 (주)원컨덕터 Protection case for joint box of ultra high voltage power cable
KR101365186B1 (en) 2012-07-06 2014-02-21 (주)원컨덕터 Outer case for power cable joint box formed by reducing and expanding diameter of pipe

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220006742A (en) * 2020-07-09 2022-01-18 문재화 Flanged pipe for fluid of high pressure
KR102424582B1 (en) * 2020-07-09 2022-07-26 문재화 Flanged pipe for fluid of high pressure
KR20220068074A (en) * 2020-11-18 2022-05-25 (주)브이월드코리아 Flange pipe for fluid of high pressure of which leaking test is easy at site
KR102454119B1 (en) * 2020-11-18 2022-10-14 (주)브이월드코리아 Flange pipe for fluid of high pressure of which leaking test is easy at site

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