KR20130014108A - Apparatus for installation of power cable - Google Patents

Apparatus for installation of power cable Download PDF

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Publication number
KR20130014108A
KR20130014108A KR1020110076037A KR20110076037A KR20130014108A KR 20130014108 A KR20130014108 A KR 20130014108A KR 1020110076037 A KR1020110076037 A KR 1020110076037A KR 20110076037 A KR20110076037 A KR 20110076037A KR 20130014108 A KR20130014108 A KR 20130014108A
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KR
South Korea
Prior art keywords
cable
power cable
power
bent portion
conductor
Prior art date
Application number
KR1020110076037A
Other languages
Korean (ko)
Inventor
한태성
최한열
이재근
고봉언
김웅기
Original Assignee
한국전력공사
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 한국전력공사 filed Critical 한국전력공사
Priority to KR1020110076037A priority Critical patent/KR20130014108A/en
Publication of KR20130014108A publication Critical patent/KR20130014108A/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
    • H02G9/02—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

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  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

A power cable laying apparatus is provided. The power cable installation, in which the radius of curvature of the cable is unnecessary, includes a first connection part coupled with a first cable drawn from a first direction, a second connection part coupled with a second cable drawn from a second direction, and the first direction and the second direction. It is formed to have a specific angle, and includes a bent portion coupled to the first connection portion and the second connection portion to electrically and mechanically connect the first cable and the second cable, wherein the first connection portion and the The mating surface with the second connecting portion is insulated by an insulator and has a watertight structure, wherein the first cable and the second cable are laid according to a specific angle of the bent portion, and the first cable and the second cable are disposed from the first cable through the bent portion. Transport power over the second cable.

Description

Power cable laying device {APPARATUS FOR INSTALLATION OF POWER CABLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power cable laying apparatus, and more particularly, to a power cable laying apparatus that can replace a cable curvature radius required for laying a power cable.

In the case of laying power cables, it is necessary to consider the radius of curvature of the cables due to the rigidity of the cables to be installed. In particular, when changing the installation angle of the cable, install the power cable along the permissible radius of curvature of about 20 times the cable diameter in the installation bend. In this case, the installation area is increased, and the size of the power or vertical sphere must be increased. In addition, the installation cost of power cables increases, the material cost and construction cost increases.

In addition, if the nature of the downtown area, it is impossible to secure the radius of curvature of the power or vertical sphere power cable can not be installed.

Therefore, there is a demand for a technology that enables the installation of a power cable without considering the radius of curvature of the cable even in a narrow work space.

On the other hand, Patent Publication No. 096645 discloses a "cable laying device using a double braided rope". The invention of Korean Patent Publication No. 096645 relates to a technique for allowing a metal takeover rope to perform a buried operation without damaging the inner wall of a curved pipe when the cable is buried underground.

Korean Patent No. 096645, "Cable installation device using double braided rope"

In order to solve the above-mentioned problems of the prior art, the present invention provides a power cable installation apparatus that can install a power cable without considering the radius of curvature of the cable in the position bent in the power or vertical sphere.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

In order to achieve the above object, the power cable laying apparatus that does not need the radius of curvature of the cable according to an aspect of the present invention, the first connecting portion coupled to the first cable is drawn from the first direction, the second drawn from the second direction A second connection portion coupled to a cable and the first direction and the second direction are formed to have a specific angle, and are combined with the first connection portion and the second connection portion to electrically and mechanically connect the first cable and the second cable; And a bent part for connecting, wherein a mating surface of the bent part with the first connection part and the second connection part is insulated by an insulator and has a watertight structure, and according to a specific angle of the bent part, Two cables are installed and transport electric power from the first cable to the second cable through the bend.

Here, the bent portion may include a conductor layer at a specific angle and electrically connected to the conductor of the first cable and the conductor of the second cable through a connecting portion, and an insulation layer to insulate the conductor layer from the outside.

Here, the bent portion may be to form a watertight structure consisting of an O-ring formed on the outer surface of the insulating layer, and a molding formed on the outer surface of the O-ring.

Here, the first connection portion, the watertight / anticorrosion processing unit for watertight between the first cable and the first connection portion is located on the front surface where the first cable is introduced, the conductor layer of the first cable and the conductor layer of the bent portion It may include a fixed connection device for electrically connecting and a coupling device for coupling the first connection portion and the bent portion.

Here, the coupling device may be formed in the bent portion and the first connection portion, respectively, coupled by a bolt.

The first connection part and the second connection part may be symmetrical to each other.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It is provided to fully inform the owner of the scope of the invention.

According to one of the problem solving means of the power cable installation apparatus of the present invention described above, it is possible to install the power cable in the power sphere, the manhole and the vertical sphere without considering the radius of curvature.

In addition, since it is not necessary to consider the free space for the radius of curvature in the power sphere, manhole and vertical sphere, it is possible to reduce the installation space and reduce the installation cost of the power cable is reduced.

1 is a schematic diagram of an operation for laying a power cable in an underground pipeline.
2 is a schematic diagram of the operation of laying a power cable in an underground power outlet.
3 is a diagram showing a radius of curvature of a cable laid on a vertical sphere of a power cable.
4 is a diagram illustrating a configuration of a power cable laying apparatus according to an embodiment of the present invention.
5 is another diagram illustrating a configuration of a power cable laying apparatus according to an embodiment of the present invention.
6 is a cross-sectional view illustrating a configuration of a first connector of a power cable laying apparatus according to an embodiment of the present invention.
7 is a view showing a bent portion of the power cable laying apparatus according to an embodiment of the present invention.
8 is a view illustrating a surface coupled to the first connector or the second connector in the bent portion according to an embodiment of the present invention.
9 is a cross-sectional view showing the internal structure of the bent portion of the power cable laying apparatus according to an embodiment of the present invention.
10A is a cross-sectional view when the power cable is installed in the vertical sphere, and FIG. 10B is a cross-sectional view when the power cable is installed in the vertical sphere using the power cable laying apparatus according to an embodiment of the present invention.
FIG. 11A is a plan view of a case in which a power cable is installed in an electric power or a manhole, and FIG. 11B is a cross-sectional view of case in which a power cable is installed in an electric power or a manhole using a power cable laying apparatus according to an embodiment of the present invention.

The present invention may be variously modified and have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail with reference to the accompanying drawings.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

In addition, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless otherwise stated.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

High-voltage power cables are thick and heavy and use different installation methods depending on the installation section and location. In FIG. 1, the operation of laying a power cable in an underground pipeline is shown. In FIG. 1, in order to install the power cable 100 through the conduit 170, an operator directly enters the vertical sphere 160 through a manhole to perform a work. First, the controller 110 for installing the caterpillar 120 and the cable drum 130 and controlling the work is installed in consideration of the radius of curvature of the power cable to be installed and the bending portion in the vertical sphere 160. Thereafter, using the pulling eye 140 to connect the take over rope 150 and the power cable 100 in the conduit 170, and install the power cable 100. At this time, when there is a portion where the power cable 100 is refracted in the vertical sphere 160, it is necessary to consider the radius of curvature of the power cable 100.

In addition, FIG. 2 illustrates the operation of laying the power cable 100 in the underground power port 200. In the case of installing the power cable in the power outlet 200, an operator is disposed in the middle of the power outlet 200 to monitor the installation situation of the power cable. In addition, the power cable 100 is moved by installing a roller 190 at a bent portion in the power tool 200. At this time, the installation work should be performed in consideration of the radius of curvature and the maximum tension of the power cable 100.

For reference, the radius of curvature of the cable (Bend Radius) refers to the radius that can bend the cable without modifying the mechanical and electrical properties of the cable. The radius of curvature refers to the limit radius of the rate of change indicative of the degree of warpage of the curve or surface. In the case of general copper cable, the radius of curvature is usually set to 6 to 8 times the cable thickness. In the case of the optical cable, the radius of curvature is generally 20 times or more of the diameter. As shown in FIG. 3, when installing the power cable 100 in the vertical sphere, the outer radius of curvature R1 and the inner radius of curvature R2 of the cable 100 laid through the upper region and the lower region of the vertical sphere. Consider all. In this case, the cable 100 is bent at least twice during the transition from the upper region to the lower region of the vertical sphere and the respective radii of curvature R1 and R2 may be the same.

4 is a diagram illustrating a configuration of a power cable laying apparatus according to an embodiment of the present invention. In FIG. 4, the power cable laying apparatus 300 includes a first connector 310, a second connector 330, and a bend 320. The power cable laying device 300 electrically conducts the power cable 100 connected to the first connection part 310 and the second connection part 330, respectively, and the two connected power cables are oriented at a desired angle through the bend part 320. This can be switched. The first connector 310 and the second connector 330 are connected to the power cable 100 to fix the power cable. The bend part 320 is connected between the first connector 310 and the second connector 330 to perform an electrical connection function between the first connector 310 and the second connector 330.

In detail, the first connector 310 and the second connector 330 may have the same structure, and may connect the same power cable 100 or different power cables. Looking at the detailed configuration of the first connector 310 and / or the second connector 330 with reference to Figure 6, the first connector 310 is watertight / anticorrosion processing unit 311, fixed connection device 312, coupling device 313. In addition, the insulating material 314, the insulating reinforcing material 315, and the protective copper tube 316 may be further included.

The watertight / corrosion processing unit 311 is located on the front surface of the power cable of the first connection unit 310, and performs the protection and watertight maintenance function of the power cable 100. To this end, the watertight / corrosive treatment unit 311 may seal the welding copper tube 316 and the cable shield (not shown) by inserting the cable in the field.

The fixed connection device 312 includes a conductor portion 321 formed at a side where the bent portion 320 and the first connection portion 310 contact each other, and a conductor 101 of the power cable 100 coupled to the first connection portion 310. Join to make contact. The conductor 101 of the power cable 100 and the conductor portion 321 of the bent portion 320 are inserted into the fixed connection device 312 and pressed. In this case, the conductor 101 of the power cable 100 and the conductor portion 321 of the bent portion 320 may have the same diameter. For example, the fixed connection device 312 may be a sleeve or the like. On one side of the sleeve, a conductor portion 321 drawn out from the bend 320 is introduced, and on the other side, the conductor 101 of the power cable 100 is introduced. Inside the sleeve, the conductor portion 321 and the conductor 101 are electrically and mechanically connected.

In addition, an outer side of the fixed connection device 312 may be filled with an insulating material 314, and the outer side of the insulating material 314 may be further filled with an insulating reinforcing material 315. The insulating material 314 and the insulating reinforcing material 315 are surrounded by a metallic protective tube 316. On the other hand, the coupling device 313 couples the bent portion 320 and the first connector 310. At this time, the coupling device 313 is formed in the bent portion 320 and the first connection portion 310, respectively, a pair of portions, respectively, a pair of coupling device 313 by combining the bend portion 320 and the first The connection part 310 may be coupled. Detailed configuration related to this will be described later with reference to FIG. 8.

The bent part 320 connects the first connector 310 and the second connector 330 at a specific angle. For example, in FIG. 4, the bent part 320 may couple the first connector 310 and the second connector 330 at an angle of 90 degrees. In addition, in FIG. 5, the bent part 320 may connect the first connector 310 and the second connector 330 at an angle of 45 degrees. In addition, the bent part 320 electrically connects the cable connected to the first connector 310 and the cable connected to the second connector 330.

Since the bend 320 electrically conducts the cable connected to the first connector 310 to the cable coupled to the second connector 330 coupled at a particular angle, the radius of curvature of the power cable 100 in the vertical or power sphere. Power cables can be laid in tight spaces without refraction.

The bend 320 may be formed in the same or similar structure as the power cable 100 to be installed. For example, when installing a power cable may have a structure matching the type and structure of the power cable to be installed. It is also possible to use various types of bend 320 in advance in accordance with the type of power cable generally used.

7 illustrates a bend 320 according to an embodiment of the present invention. The curved portion 320 is coupled to the first connecting portion 310 by a pair of coupling devices 313 formed at the curved portion 320 and the first connecting portion 310, respectively. In addition, a conductor layer 321 through which electricity is conducted is formed at the center of the coupling surface of the bent portion 320 to the first connection portion 310, and an insulation layer 322 is formed outside the conductor layer 321. Formed. The exterior of the bend 320 is surrounded by an enclosure having a certain hardness, and protects the conductor layer 321 and the insulating layer 322 and the like and performs a watertight function.

The configuration of the coupling surface of the bent portion 320 may be configured in the same coupling surface coupled to the second connection portion 330.

8 illustrates a cross section of the mating surface of the bent portion 320. As shown in FIG. 8, the coupling surface of the bend 320 has a conductor layer 321 formed at the center thereof, and an insulation layer 322 surrounds the conductor layer 321 outside the conductor layer 321. Cheap and formed. One or more O-rings 326 are formed on the outer surface of the insulating layer 322, and a molding 327 is formed on the outer surface of the O-ring 326. The outer surface of the molding 327 is formed with an enclosure 329 constituting the outside of the coupling device 313, the bending portion 320 and its coupling device 313 has a watertight structure. The coupling device 313 may couple the bent portion 320 and the first connection portion 310 through, for example, bolts formed at regular intervals between the moldings 327.

9 is a cross-sectional view of the bend 320. As shown in FIG. 9, the bent part 320 includes a conductor layer 321 in which electricity is conducted at the center thereof, and the inner semiconducting layer 322, the insulating layer 323, and the outer semiconducting layer 324 are moved outwards. ) Is formed. In addition, a shielding layer (not shown) or an anticorrosive layer (not shown) may be further formed outside the outer semiconducting layer 324. The conductor 321, the inner semiconducting layer 322, the insulating layer 323, the outer semiconducting layer 324, and the shielding layer and the anticorrosive layer are surrounded by the enclosure 325 so as to be blocked from the outside. The conductor layer 321 is electrically connected to the conductor 101 of the power cable 100 coupled to the first connection part 310 and the second connection part 330, so that the conductor layer 321 is connected to the power cable 100 of the first connection part 310. The power is transferred between the power cables of the second connector 330. Preferably, the diameter of the conductor layer 321 may be formed to be the same as the diameter of the conductor of the power cable 100.

The second connector 330 may have the same structure as the first connector 310, and a redundant description thereof will be omitted.

10A is a cross-sectional view when the power cable is installed in the vertical sphere, and FIG. 10B is a cross-sectional view when the power cable is installed in the vertical sphere using the power cable laying apparatus according to an embodiment of the present invention.

As shown in FIG. 10A, the power cable 100 installed in the ground may have to pass through the vertical sphere 160. In particular, when the vertical sphere 160 is located between the multilayer power sphere 200, it is necessary to bend the cable in consideration of the radius of curvature corresponding to the cable as shown in Figure 10a. In this case, the cable may be fixed to the cable fixing device 161. Therefore, a certain area or more space is required to ensure the radius of curvature of the cable. In addition, when installing various types of cables, since the radius of curvature of each cable is different from each other, the space required may be determined based on the cable having the largest radius of curvature.

FIG. 10B illustrates a case in which the power cable 100 is laid using the power cable laying apparatus 300 according to an embodiment of the present invention. As can be seen through Figure 10b, when installing the power cable in the vertical sphere by using the power cable installation apparatus 300, it is not necessary to consider the radius of curvature of the power cable 100, space required compared to the conventional installation method Can be reduced. Therefore, there is an advantage in that the power cable 100 can be laid using the power cable laying apparatus 300 of the present invention even in a narrow vertical sphere 160 which was not possible with the conventional method.

FIG. 11A is a plan view of a case in which a power cable is installed in a power sphere, and FIG. 11B is a cross-sectional view of case in which a power cable is installed in a power sphere using a power cable laying apparatus according to an embodiment of the present invention.

As shown in FIG. 11A, in the case of a power outlet 200 for laying a power cable, there are a number of points in which the direction is changed. In this case, as illustrated in FIG. 11A, to install the power cable in the power tool 200 using the conventional power cable installation method, the power tool 200 having a structure satisfying the radius of curvature of the cable is required.

On the other hand, as shown in Figure 11b, when laying the power cable 100 in the power port 200 by using the power cable laying apparatus 300 according to an embodiment of the present invention, the power cable 100 The power cable 100 may be installed inside the power port 200 without requiring a space required to satisfy the radius of curvature. Therefore, there is an advantage in that the power cable 100 can be laid using the power cable laying apparatus 300 of the present invention even in a narrow vertical sphere 160 which was not possible with the conventional method. Therefore, an effect that can install the power cable 100 by using the power cable laying device 300 of the present invention also occurs in the narrow vertical sphere 160 that was impossible with the conventional method.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments.

The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims (7)

In a power cable laying apparatus that does not require a radius of curvature of a cable,
A first connector coupled to the first cable drawn in from the first direction,
A second connecting portion coupled with a second cable introduced from the second direction;
The first direction and the second direction is formed to have a specific angle, and includes a bent portion coupled to the first connecting portion and the second connecting portion for electrically and mechanically connecting the first cable and the second cable,
The engaging surface of the bent portion with the first connecting portion and the second connecting portion is insulated by an insulator and made of a watertight structure,
The first cable and the second cable is installed in accordance with a specific angle of the bent portion, the power cable installation apparatus for transporting power from the first cable to the second cable through the bent portion. The method of claim 1,
And the bent portion includes a conductor layer at a specific angle and electrically connected to the conductor of the first cable and the conductor of the second cable through a connecting portion, and an insulation layer to insulate the conductor layer from the outside. The method of claim 2,
And the bent portion forms a watertight structure composed of an O-ring formed on an outer surface of the insulating layer and a molding formed on an outer surface of the O-ring. The method of claim 1,
The first connection portion,
A watertight / corrosion treatment unit located at the front surface through which the first cable is introduced and sealing between the first cable and the first connection unit;
Fixed connection device for electrically connecting the conductor of the first cable and the conductor layer of the bent portion;
Coupling device for coupling the first connecting portion and the bent portion
Power cable installation apparatus comprising a. The method of claim 4, wherein
The coupling device is formed in each of the bent portion and the first connection portion, and the power cable laying device is coupled by a bolt. The method of claim 1,
And the first connector and the second connector are symmetrical with each other. The method of claim 1,
And the fixed connection device can be connected by changing the size of the conductor sleeve in accordance with the type of the power cable to be connected.
KR1020110076037A 2011-07-29 2011-07-29 Apparatus for installation of power cable KR20130014108A (en)

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KR1020110076037A KR20130014108A (en) 2011-07-29 2011-07-29 Apparatus for installation of power cable

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Application Number Priority Date Filing Date Title
KR1020110076037A KR20130014108A (en) 2011-07-29 2011-07-29 Apparatus for installation of power cable

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KR20130014108A true KR20130014108A (en) 2013-02-07

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150140446A (en) 2014-06-05 2015-12-16 제우전력주식회사 Method of pulling cabel in plural span
KR102029182B1 (en) * 2019-07-16 2019-10-08 대한전선 주식회사 Cable laying method using cable laying appartus capable of changing direction of cable
KR102032360B1 (en) * 2019-07-16 2019-10-16 대한전선 주식회사 Cable laying appartus capable of changing direction of cable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150140446A (en) 2014-06-05 2015-12-16 제우전력주식회사 Method of pulling cabel in plural span
KR102029182B1 (en) * 2019-07-16 2019-10-08 대한전선 주식회사 Cable laying method using cable laying appartus capable of changing direction of cable
KR102032360B1 (en) * 2019-07-16 2019-10-16 대한전선 주식회사 Cable laying appartus capable of changing direction of cable

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