KR102419395B1 - Connecting Structure of Power Cable Conductor, Connecting Method Of The Same and Connecting Device Of The Same - Google Patents

Abstract

The present invention relates to a conductor connection structure of a power cable capable of minimizing the cost of the connection operation of the power cable by reducing the working time of the connection operation and minimizing the variation in the quality of the connection operation.

Description

Connecting Structure of Power Cable Conductor, Connecting Method Of The Same and Connecting Device Of The Same }

The present invention relates to a conductor connection structure of a power cable and a conductor connection method of a power cable. More specifically, the present invention provides a conductor connection structure of a power cable and a conductor connection method of a power cable that can minimize the cost of the connection operation of the power cable by reducing the working time of the conductor connection operation and minimizing the variation in the quality of the connection operation is about

The conductor portion of the power cable may be a copper (Cu) conductor or an aluminum (Al) conductor as a conductor. In addition, in many cases, the conductor part is formed by combining a plurality of wires for bending characteristics and the like.

In addition, in the case of a copper conductor, a plurality of wires may be insulated from each other due to the skin effect of the metal when current is passed through, and thus, the wire insulated conductor portion may be configured.

In the case of connecting such power cables, in the related art, the insulating layer of each element constituting the conductor part is removed, it is reassembled, the conductor parts of both power cables to be connected are brought into contact, and then the method of compression is used.

However, the method of connecting the conductor parts of both cables by means of crimping by removing the insulating layer of each element constituting the conductor part and reassembling them takes a long time, and potential quality due to scattering of conductive materials in the process of stripping the insulating layer. There is a problem in that it has a risk and requires considerable work skill.

An object of the present invention is to provide a conductor connection structure of a power cable capable of reducing the working time of the connection operation and minimizing the variation in the quality of the connection operation, thereby minimizing the cost of the connection operation of the power cable.

In order to solve the above problems, the present invention provides a conductor connection structure of a power cable for connecting a conductor unit composed of a plurality of wires of the power cable, comprising: a conductor unit of a pair of cables; a sleeve member in the form of a pipe into which the conductor part is inserted into the openings at both ends, the sleeve member having a plurality of fastening holes; a plurality of conductor particles inserted into the receiving space between the ends of the pair of conductor parts inserted into the sleeve member to electrically connect the pair of conductor parts; at least one energizing bolt fastened to the fastening hole of the sleeve member to electrically connect the pair of conductor parts by pressing the conductive particles injected into the accommodation space; and a fixing bolt fastened to a fastening hole of the sleeve member in order to fix the conductor part inserted into the sleeve member.

In this case, the energizing bolt and the fixing bolt may be a breaking bolt in which a head portion is broken and separated when a torque of a predetermined size or more is applied.

In addition, the width of the accommodating space may be smaller than the width of the threaded body portion of the energizing bolt.

In addition, the maximum width of the conductor particles may have a size of 5% to 20% of the width of the accommodation space.

Here, when the energizing bolt is fastened in a state in which the conductive particles are put into the receiving space, the energizing bolt is compressed by the end side surfaces of both conductor parts and the energizing bolt to contact the conductive particles with reduced voids. have.

In this case, the conductor particles may be made of silver, copper, or an alloy material thereof, or a metal material plated with silver, copper, or an alloy material thereof.

In addition, the conductive particles may be formed by silver plating a cut copper wire or a cut copper wire.

In addition, the fixing bolt and the energizing bolt may be made of brass or a brass alloy material.

In this case, the sleeve member may be made of tin-plated copper or tin-plated copper alloy.

In addition, a plurality of energizing fastening holes to which a plurality of energizing bolts are fastened may be formed in a central portion of the sleeve member at predetermined intervals along the circumferential direction.

In addition, in an area other than the central portion of the sleeve member, a plurality of fixing fastening holes to which a plurality of fixing bolts are fastened may be formed to be spaced apart from each other.

In order to solve the above problems, the present invention provides a conductor portion inserting step of inserting a conductor portion of a pair of power cables into openings at both ends of a sleeve member in the form of a pipe having a plurality of fastening holes; a conductive particle input step of introducing a plurality of conductive particles into the receiving space between the ends of both conductive parts inside the sleeve member; a conductor part fixing step of fixing the conductor part by fastening a fastening bolt to the sleeve member; And, by fastening a energizing bolt to the sleeve member to reduce the voids of the conductive particles introduced in the conductive particle input step and compress them, and electrically connect the ends of the pair of conductors inserted into the sleeve member through the compressed conductive particles. It is possible to provide a method for connecting a conductor of a power cable comprising a conductor portion energizing step.

In addition, in the inserting of the conductor part, at least one energizing bolt is temporarily fastened to the sleeve member to limit the insertion depth of both conductor parts, and at the same time, the ends of both conductor parts may be spaced apart to form the accommodation space.

In addition, it may be carried out so that the energizing bolts fastened in the energizing step of the conductor parts are in contact with the ends of both conductors and the conductor particles.

In this case, the fixing bolt and the energizing bolt are breaking bolts, and the fixing bolt and the energizing bolt are not exposed to the outer peripheral surface of the sleeve member in the fixing of the conductor part and the energizing of the conductor part. It can be fastened by breaking the head of the dedicated bolt.

In order to solve the above problems, the present invention is a power cable conductor connecting device for connecting a pair of conductor parts composed of a plurality of wires of a power cable to each other, in the form of a pipe with both ends open, and a predetermined interval along the circumferential direction a sleeve member having a plurality of fastening fastening holes for fixing formed by and a fastening hole for energizing formed at predetermined intervals along a circumferential direction between the plurality of fastening fastening holes; at least one energizing bolt fastened to the energizing fastening hole to electrically connect the pair of conductors; at least one fixing bolt fastened to the fixing fastening hole to fix the conductor part accommodated in the sleeve member; and a plurality of conductor particles accommodated in the sleeve member to electrically connect the pair of conductor parts.

In addition, the energizing bolt and the fixing bolt may be a breaking bolt including a head part that is broken and separated when a torque of a predetermined size or more is applied.

In addition, the energizing bolt may include a lower end and a body formed between the lower end and the head, and the diameter of the body may be greater than or equal to the maximum diameter of the lower end.

In this case, the maximum width of the conductor particles may have a size of 5% to 20% of the maximum diameter of the lower end of the energizing bolt.

In addition, the conductor particles may be made of silver, copper, or an alloy material thereof, or a metal material plated with silver, copper, or an alloy material thereof.

In addition, the sleeve member may be made of tin-plated copper or tin-plated copper alloy.

Here, the fixing bolt and the energizing bolt may be made of brass or a brass alloy material.

According to the conductor connection structure of the power cable according to the present invention, it is possible to significantly shorten the working time of the connection operation compared to the conventional method of stripping and crimping a single wire insulated conductor.

In addition, according to the conductor connection structure of the power cable according to the present invention, since the breaking bolt is used to connect the conductor part of the power cable, work skill is not required, so the working cost can be greatly reduced.

In addition, according to the conductor connection structure of the power cable according to the present invention, conductive particles are introduced into the accommodating space in the center of the sleeve between the cut surfaces of the conductor parts of both cables, and the voids inside the injected conductor particles are reduced by using a energizing bolt as a fastening means. Since the cut surfaces of both conductors are electrically connected to each other, scattering of the conductive material generated in the process of stripping the insulating part of the wire does not occur, so that quality stability can be improved.

1 shows a cross-sectional view of a power cable connectable by the conductor connection structure of the power cable according to the present invention.
2 is a partially cut-away perspective view of a conductor connection structure of a power cable according to the present invention.
3 is a perspective view of a sleeve member constituting a conductor connection structure of a power cable according to the present invention.
4 is a cross-sectional view of a sleeve member constituting the conductor connection structure of the power cable according to the present invention.
5 to 9 show the connection process of the conductor connection structure of the power cable according to the present invention.
10 is a perspective view of a conductor connection structure of a power cable according to the present invention in which the connection is completed.
11 shows a state in which the corona shield is mounted on the conductor connection structure of the power cable according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed subject matter may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art. Like reference numerals refer to like elements throughout.

As shown in FIG. 1 , the power cable 100 connectable by the connection structure of the power cable 100 according to the present invention includes a conductor part 10 and an inner semiconducting layer 20 surrounding the conductor part 10 . ), an insulating layer 30 surrounding the inner semiconducting layer 20, an outer semiconducting layer 40 surrounding the insulating layer 30, and a metal sheath or a neutral wire surrounding the outer semiconducting layer 40. Electrical shielding and It may include a shielding layer 50 for the return of the short-circuit current, an outer shell 60 surrounding the shielding layer 50 , and the like.

The conductor part 10 may be made of a single wire made of copper, aluminum, preferably copper, or a stranded wire in which a plurality of conductive wires are combined, and the diameter of the conductive part 10 and the wire 11 constituting the stranded wire The standard including the diameter and the like may be different depending on the transmission voltage, use, etc. of the power cable 100 including the same, and may be appropriately selected by a person skilled in the art.

Each of the wires 11 constituting the conductor portion 10 is insulated from each other to reduce the conductor resistance due to the skin effect, thereby maximizing the amount of power transmission.

Conventionally, when connecting such a single wire insulated power cable 100, the insulation of the wire is removed and the conductor part 10 of both cables is used as a crimping method. ), the conductor part 10 of the cable connected to the inside is inserted, the conductor particles mp are injected into the center, and the energizing bolt 310 is fastened to electrically connect both cables. A detailed description thereof will be described below with reference to FIG. 2 .

The inner semiconducting layer 20 constituting the power cable 100 is disposed between the conductor part 10 and the insulating layer 30 to prevent interlayer lifting between the conductor part 10 and the insulating layer 30 . It removes the induced air layer and performs functions such as alleviating local electric field concentration. On the other hand, the outer semiconducting layer 40 performs a function of applying an equal electric field to the insulating layer 30 , mitigating local electric field concentration, and protecting the cable insulating layer from the outside.

In general, in the inner semiconducting layer 20 and the outer semiconducting layer 40, conductive particles such as carbon black, carbon nanotubes, carbon nanoplates, and graphite are dispersed in a base resin, and a crosslinking agent, antioxidant, scorch inhibitor, etc. It is formed by extrusion of an additionally added semiconducting composition.

Here, for the base resin, an olefin resin similar to the base resin of the insulating composition forming the insulating layer 30 may be used for interlayer adhesion between the semiconducting layers 20 and 40 and the insulating layer 30 . .

In addition, the insulating layer 30 may be, for example, a polyolefin resin such as polyethylene or polypropylene as a base resin, and may preferably be formed by extrusion of an insulating composition using a polyethylene resin as a base resin.

As the polyethylene resin, ultra-low-density polyethylene (ULDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), etc. may be applied, and in the case of a high-voltage cable, conventional OF Cables are rapidly being replaced by cross-linked polyethylene (XLPE) insulated cables.

In addition, the jacket layer 20 may be made of any one of polyethylene, polyvinyl chloride, and polyurethane.

In the connection structure of the power cable for connecting the conductor unit 10 composed of a plurality of wires of the power cable 100 according to the present invention, the conductor unit 10 of a pair of cables and the conductor unit 10 are The sleeve member 200 in the form of a pipe, which is inserted into the openings at both ends, provided with a plurality of fastening holes, is inserted into the receiving space between the ends of the pair of conductor parts 10 inserted into the sleeve member 200 . A plurality of conductor particles mp for electrically connecting the pair of conductor parts, and the sleeve member 200 to electrically connect the pair of conductor parts by pressing the conductor particles injected into the accommodation space. At least one energizing bolt 310 fastened to the hole, and a fixing bolt 330 fastened to the fastening hole of the sleeve member 200 to fix the conductor part 10 inserted into the sleeve member. can be configured.

As shown in FIG. 1 , the power cable 100 connectable by the connection structure of the power cable 100 according to the present invention includes a conductor part 10 and an inner semiconducting layer 20 surrounding the conductor part 10 . ), an insulating layer 30 surrounding the inner semiconducting layer 20, an outer semiconducting layer 40 surrounding the insulating layer 30, and a metal sheath or a neutral wire surrounding the outer semiconducting layer 40. Electrical shielding and It may include a shielding layer 50 for the return of the short-circuit current, an outer shell 60 surrounding the shielding layer 50 , and the like.

In addition, the power cable conductor connecting device for connecting a pair of conductor parts 10 composed of a plurality of wires of the power cable 100 according to the present invention to each other is in the form of a pipe with both ends open and at predetermined intervals along the circumferential direction. A sleeve member 200 having a plurality of fastening fastening holes 230 for fixing and a plurality of fastening holes 210 for energization formed at predetermined intervals along the circumferential direction between the plurality of fastening holes for fixation; At least one energizing bolt 310 fastened to the hole 230 to electrically connect the pair of conductor parts, and at least one energizing bolt 310 fastened to the fixing fastening hole 230 to fix the conductor part accommodated in the sleeve member. One fixing bolt 330 and a plurality of conductor particles mp accommodated inside the sleeve member 200 to electrically connect the pair of conductor parts 10 may be included.

As shown in FIG. 2 , the power cable 100 connection structure according to the present invention may include a sleeve member 200 into which both conductors 10 of the connected cable are inserted and fixed.

The sleeve member 200 is a metal member with excellent conductivity in the form of a pipe having both ends open and a plurality of fastening holes formed therein. For example, the sleeve member 200 may be made of tin-plated copper or tin-plated copper alloy material.

In addition, the sleeve member 200 may be provided with a fastening hole for fastening a plurality of bolts. Specifically, the sleeve member includes a plurality of fastening fastening holes formed at predetermined intervals along the circumferential direction and energizing fastening holes formed at predetermined intervals along the circumferential direction between the plurality of fastening fastening holes.

Among the plurality of fastening holes formed in the sleeve member 200 shown in FIG. 3 , the fastening hole formed in the center of the sleeve member 200 allows the conductor portion 10 of the cable to be connected to be inserted into both ends of the sleeve member 200 . A fastening hole for energization for fastening the energizing bolt 310 for electrically connecting the both conductors 10 by pressing the conductive particles mp injected into the receiving space formed between the both conductors 10 in the (210).

And, of the plurality of fastening holes formed in the sleeve member 200 shown in FIG. 3 , a fastening hole formed other than the central portion of the sleeve member 200 is a fixing bolt in a state in which the conductor part 10 of the connected cable is inserted. It is a fastening hole 230 for fixing the conductor part 10 and the sleeve member 200 by fastening the 330 .

When the fixing bolt 330 is fastened to the fixing fastening hole 230 , the conductive part 10 is plastically deformed or penetrated at the fastening portion to prevent movement of the conductive part 10 in the longitudinal direction of the sleeve member 200 . can be blocked

The energizing fastening hole 210 to which the energizing bolt 310 shown in FIG. 3 is fastened may be formed at a position corresponding to the conductor particle mp accommodating space in the center of the sleeve member 200 . Accordingly, a plurality of fastening holes 210 for energization may be formed at predetermined intervals along the circumference of the central portion of the sleeve member 200 .

In addition, each fixing hole 230 is also formed at predetermined intervals along the circumference of each position at predetermined intervals in the longitudinal direction of the sleeve member 200 in an area other than the central portion of the sleeve member 200 . 3 and 4 , adjacent fastening holes may be alternately formed in the longitudinal direction of the sleeve member 200 . This is to ensure that the fixing effect of the fixing bolt 330 is dispersed throughout the conductor part 10 and the compressive effect of the conductor particle mp by the energizing bolt 310 is not concentrated in a specific area.

The energizing bolt 310 may include a head to which a torque is applied with a tool and a body in which a thread is formed. The head part is a region that is broken when fastening is completed, and the body part enters into the sleeve member when fastening is completed and is fastened.

Specifically, the energizing bolt 310 has a head portion that is broken and separated when a torque greater than or equal to a predetermined size is applied, and a body portion formed under the head portion including a screw thread, and the body portion formed under the body portion It may be configured to include a lower end. In this case, the diameter of the body portion may be greater than or equal to the maximum diameter of the lower end portion.

The lower end of the lower end of the energizing bolt 310 limits the insertion depth of the pair of conductors inside the sleeve member 200 to space the ends of both conductors apart to increase the width of the accommodating space, as will be described later. decide

Therefore, the width of the receiving space is configured to be smaller than the width of the body portion in which the thread of the energizing bolt 310 is formed by the diameter of the lower end, preferably, the maximum diameter of the lower end, and the conductor particles are injected into the receiving space. When the energizing bolt 310 is fastened in this state, the energizing bolt 310 is press-fitted between the end side surfaces of both conductors to be fastened and at the same time compressed by the energizing bolt to contact the conductive particles with reduced voids. can make it

As shown in FIG. 4 , each bolt fastening hole is threaded to enable adjustment of the fastening force according to the fastening depth of the energizing bolt 310 and the fixing bolt 330 . As will be described later, the energizing bolt 310 and the fixing bolt 330 may be configured as a breaking bolt in which a head portion is broken when a force of a predetermined size or more is applied.

The reason for configuring the energizing bolt 310 and the fixing bolt 330 as a breaking bolt is as described later, the connection structure of the power cable 100 according to the present invention must be accommodated in the junction box, This is because it is difficult to have a structure in which a corona shield or the like must be mounted on the outside of the structure, and the bolt head or the like protrudes from the surface of the sleeve member 200 constituting the power cable 100 for reasons such as prevention of electric field concentration.

The energizing bolt 310 and the fixing bolt 330 may be made of a brass material.

5 to 9 show a connection process of the connection structure of the power cable 100 according to the present invention.

In the method for connecting a conductor of a power cable according to the present invention, a conductor part insertion step (S100) of inserting the conductor part of a pair of power cables into the openings at both ends of a pipe-shaped sleeve member provided with a plurality of fastening holes (S100), the inside of the sleeve member Conductor particle input step (S200) of injecting a plurality of conductor particles into the receiving space between the ends of both conductor parts of In the conductive part energization step ( S400) may provide a method for connecting a conductor of a power cable including.

In the power cable 100 connection structure according to the present invention, a separate conductor particle (mp) is added to the conductor part ( 10) After inserting into the accommodating space (S) between both ends, the energizing bolt 310 is tightened inwardly to reduce the voids between the conductor particles (mp) and connect the cable by a method of close contact. In the method of directly contacting the conductor part 10 of the cable, the uniform surface contact of the end of the conductor part 10 is not easy, so the resistance is inevitably increased. do.

However, in the power cable 100 connection structure according to the present invention, the conductor part 10 is inserted into the sleeve member 200 by the conductor part 10 of both power cables 100 and then the fixing bolt 330 is fastened. ), and after the fixing of the conductor part 10 is completed, the conductor particle (mp) is injected into the space between the both ends of the conductor part 10 of both cables, and then the energizing bolt 310 is tightened to obtain the conductor particle (mp). The gap between them is minimized and the conductor particles mp complete the electrical connection of both ends of the conductor part 10 of the cable to be connected, thereby completing the connection of the power cable 100 . A process of forming the power cable 100 connection structure according to the present invention will be described.

As shown in FIG. 5 , the energizing bolt 310 is temporarily fastened to at least one energizing fastening hole 210 among a plurality of energizing fastening holes 210 formed in the center of the sleeve member 200 . The conductor part insertion step (S100) of inserting the conductor part 10 of the connection target cable into the sleeve may be performed.

Here, in a state in which the energizing bolt 310 is partially protruded into the receiving space of the sleeve member 200 in the at least one energizing fastening hole 210 , the conductor part 10 is connected to the sleeve member 200 . When inserted into the inside, the inner end of the energizing bolt 310 may serve as a stopper. That is, in the conductor part insertion step ( S100 ), at least one energizing bolt 310 is temporarily fastened to the sleeve member 200 to limit the insertion depth of both conductor parts and at the same time to space the ends of both conductor parts apart so that the receiving space can form.

Accordingly, as shown in FIG. 6 , an accommodation space S may be formed between the ends of both conductors 10 by the energizing bolt 310 serving as a stopper.

When the insertion of both conductors 10 is completed, the plurality of fixing bolts 330 may be temporarily fastened. Here, the temporary fastening assumes a weak fastening state in which the bolt head is not broken as a temporary fastening state.

The reason for temporarily fastening the fixing bolt 330 in a state in which the conductor part 10 is inserted into the sleeve member 200 is that the fixing bolt 330 ), this is because plastic deformation of the conductor part 10 occurs, and conductor wires are introduced into the accommodation space S, so that the input and interference of the conductor particles mp may occur.

And, as shown in FIG. 6 , at least one fastening hole among the plurality of energizing fastening holes 210 is left for the input of the conductive particles mp, and at least one fastening hole is a tube for performing a stopper function. The dedicated bolt 310 can be fastened so that it protrudes inward, and the remaining energizing bolts 310 are also temporarily placed in the remaining energizing fastening holes to prevent loss of the conductor particles mp during the injection process of the conductor particles mp. can be contracted

Here, the reason for temporarily fastening the energizing bolt 310 is to maximize the effect of pressing and compressing the conductor particles (mp) put into the receiving space (S) with the energizing bolt, as will be described later. The main fastening in such a way that the head of the 310 is broken can be postponed.

Then, as shown in FIG. 7 , a conductor particle input step ( S200 ) of introducing the conductor particle mp into the accommodation space S may be performed. The maximum width of the conductor particles (mp) is 5% to 20% of the width of the accommodation space (S) in order to prevent interference or jamming during the input process and to evenly fill the entire accommodation space (S). It is desirable to be satisfied.

The conductor particle mp may be made of a metal material having good electrical conductivity. For example, the conductor particle mp may be made of silver, copper or an alloy material thereof, or plated with silver, copper or an alloy material thereof. It may be made of a metal material, and a method of finely cutting a metal wire may be used as a method of configuring the conductor particles (mp).

Accordingly, the conductor particles mp are copper, silver, copper alloy, silver alloy, silver-plated copper, silver-alloy-plated copper, silver-plated copper alloy, silver-alloy-plated copper alloy, copper-plated silver, copper alloy-plated silver, copper-plated silver alloy, copper The alloy plating may be made of various materials such as an alloy. In addition, the material of the plurality of conductor particles mp may be composed of copper or an alloy material thereof, or may be composed of various combinations as long as it is a metal material plated with silver, copper, or an alloy material thereof.

As shown in FIG. 8 , when the input of the conductive particles mp is completed, the energizing bolt 310 may be fastened to the energizing fastening hole 210 used as an inlet for the conductive particles mp, FIG. 9, this fastening may be performed so that the head of the energizing bolt 310 is broken.

And, as shown in FIG. 8 , it is preferable that the main fastening of the fixing bolt 330 which was temporarily fastened before the main fastening of the energizing bolt 310 is performed.

As shown in FIG. 8 , the fixing bolt 330 is a conductor for fixing the sleeve member 200 and the conductor part 10 by plastically deforming or penetrating the conductor of the conductor part 10 during this fastening process. A sub-fixing step (S300) may be performed.

That is, in a state in which the conductor particle mp is put into the sleeve member 200 , before the main fastening bolt 310 for energization is performed, the fixing bolt 330 is viewed in the fixing fastening hole 230 . It is preferable to fasten. This is to prevent the conductor part 10 from being pushed back by the pressure applied during the main fastening process of the energizing bolt 310 and to strengthen the contact state between the end side of the conductor part 10 and the conductor particles mp. to be.

The conductor particles mp are made of a metal material, and may be made of small metal particles, etc., and in a simple injected state, a significant portion of voids may exist between the particles. However, as shown in FIG. 9 , when the fastening of the energizing bolt 310 is completed while the fastening of the fixing bolt 330 is completed, the voids between the conductor particles mp are reduced or removed, and the conductor Since the contact area between the particles and the contact area between the conductor particles and the end side of the conductor part 10 is increased, the contact resistance can be reduced. In this case, since the sleeve member 200 and the conductor part 10 are fixed by the fixing bolt 330 , the sleeve member 200 and the conductor part 10 may not be pushed back during the main fastening of the electricity supply bolt 310 .

Conventionally, in the case of connecting an insulated wire cable, a method of removing the insulation coating of each wire and compressing it has been used, but in the case of the power cable 100 connection structure according to the present invention, conductor particles (mp) are used to Since the end face of the power cable 100 to be connected is electrically connected, a separate insulating layer removal operation is not required, so workability can be improved.

In addition, it is preferable that the energizing bolt 310 be in direct contact with the end of the conductor part 10 after being fastened. Specifically, the energizing bolt 310 has a body portion (thread-formed portion) formed between the lower end and the head portion, and the diameter of the body portion is formed to be greater than or equal to the maximum diameter of the lower end of the energizing bolt 310 can be Such a shape may be implemented by a method of configuring the shape of the lower end of the energizing bolt 310 in a hemispherical shape.

When the fixing bolts 330 are properly fastened as described above, the conductive particles (mp) are filled in the receiving space (S) where the ends of the pair of conductors are spaced apart by a certain distance by the ends of the current-carrying bolts. In this state, the pair of conductor parts 10 are fixed to the sleeve member 200 .

In a state in which the conductor part 10 is fixed to the sleeve member 200, the energizing bolt 310 is fastened to the sleeve member 200 to reduce the voids of the conductive particles introduced in the conductor particle input step (S200) and compress them. Then, the conductive part energizing step (S400) of electrically connecting the ends of the pair of conductive parts inserted into the sleeve member through the compressed conductive particles may be performed.

In the conduction step (S400) of the conductor part, the energization bolt (S100) to be fastened may be brought into contact with the ends of both conductor parts and the conductor particles.

Specifically, when the energizing bolt 310 is finalized, the energizing bolt 310 enters the sleeve member 200 inside and presses and compresses the conductor particle mp while simultaneously compressing the conductor end portion. The body portion of the energizing bolt 100 having a larger diameter than the distance (width of the accommodation space) may be in contact with the ends (surfaces) of the pair of conductors 10 . Therefore, the conduction path can be diversified by allowing the conduction bolt and the conductor end to come into direct contact so that the conductor end (surface) is connected via the electric conduction bolt 310 together with the compressed conductor particles.

10 shows a perspective view of the connection structure of the power cable 100 according to the present invention in which the connection is completed, and FIG. 11 shows a state in which the corona shield is mounted on the connection structure of the power cable 100 according to the present invention.

As shown in FIG. 10 , in the connection structure of the connected power cable 100 , the heads of the fixing bolts 330 and the energizing bolts 310 are both broken and the sleeve member 200 does not protrude outward. The connection can be completed so that In addition, the corona shield 500 is formed to surround the sleeve member 200, and the conductor connection part formed by the sleeve member and the like and the corona shield are energized with each other by the metal wire 600, etc. can prevent accidents.

As shown in FIG. 11 , the connection structure of the power cable 100 to which the corona shield is mounted may have a smooth surface without step or the like.

In this way, when the power cable 100 is connected, the working time can be greatly reduced, and variations in the contact quality of the connection part due to the skill difference of the operator can be minimized.

Although the present specification has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims described below. will be able to carry out Therefore, if the modified implementation basically includes the elements of the claims of the present invention, all of them should be considered to be included in the technical scope of the present invention.

100: power cable
200: sleeve member
310: energizing bolt
330: fixing bolt

Claims (22)

In the conductor connection structure of a power cable for connecting a conductor part composed of a plurality of wires of the power cable,
a conductor portion of a pair of cables;
a sleeve member in the form of a pipe in which the conductor part is inserted into the openings at both ends, and adjacent fastening holes among a plurality of fastening holes for current use and a plurality of fastening holes for fixing are alternately formed in a longitudinal direction;
a plurality of conductor particles for electrically connecting the pair of conductor parts by being introduced into the energizing fastening hole formed at a position corresponding to the receiving space between the ends of the pair of conductor parts inserted into the sleeve member;
at least one energizing bolt fastened to the energizing fastening hole of the sleeve member to electrically connect the pair of conductive parts by pressing the conductive particles injected into the accommodating space; and,
and a fixing bolt fastened to a fixing fastening hole of the sleeve member to fix the conductor part inserted into the sleeve member. According to claim 1,
The conductor connection structure of the power cable, characterized in that the energizing bolt and the fixing bolt are breaking bolts that are separated by breaking the head when a torque greater than or equal to a predetermined size is applied. According to claim 1,
The width of the accommodating space is smaller than the width of the threaded body portion of the energizing bolt, the conductor connection structure of the power cable. According to claim 1,
The conductor connection structure of the power cable, characterized in that the maximum width of the conductor particles has a size of 5% to 20% of the width of the accommodation space. According to claim 1,
When the energizing bolt is fastened in a state in which the conductor particles are put into the receiving space, the energizing bolt is compressed by the end side surfaces of both conductor parts and the energizing bolt and comes into contact with the conductive particles with reduced voids. Conductor connection structure of power cables. According to claim 1,
The conductor connection structure of the power cable, characterized in that the conductive particles are made of silver, copper, or an alloy material thereof, or a metal material plated with silver, copper, or an alloy material thereof. 7. The method of claim 6,
The conductor particle is a conductor connection structure of a power cable, characterized in that it is formed by silver plating a cut copper wire or a cut copper wire. According to claim 1,
The sleeve member is a conductor connection structure of a power cable, characterized in that the tin-plated copper or tin-plated copper alloy material. According to claim 1,
Conductor connection structure of the power cable, characterized in that the fixing bolt and the energizing bolt are made of brass or a brass alloy material. According to claim 1,
Conductor connection structure of a power cable, characterized in that in the central portion of the sleeve member, a plurality of energizing fastening holes to which a plurality of energizing bolts are fastened are formed at predetermined intervals along the circumferential direction. 11. The method of claim 10,
A conductor connection structure of a power cable, characterized in that in an area other than the central portion of the sleeve member, a plurality of fixing holes for fixing a plurality of fixing bolts are formed to be spaced apart from each other. A conductor part insertion step of inserting the conductor part of a pair of power cables into the openings at both ends of the pipe-shaped sleeve member in which adjacent fastening holes among the plurality of current-use fastening holes and the plurality of fastening fastening holes are alternately formed in the longitudinal direction;
a conductor particle input step of injecting a plurality of conductor particles into the energizing fastening hole formed at a position corresponding to the receiving space between the ends of both conductor parts inside the sleeve member;
a conductor part fixing step of fixing the conductor part by fastening a fixing bolt to the fixing fastening hole of the sleeve member; and,
The energizing bolt is fastened to the energizing fastening hole of the sleeve member to reduce the voids of the conductive particles introduced in the conductor particle input step and compress, and electrically connect the ends of the pair of conductors inserted into the sleeve member through the compressed conductive particles. Conductor connection method of a power cable comprising a; 13. The method of claim 12,
In the conductor part insertion step, at least one energizing bolt is temporarily fastened to the sleeve member to limit the insertion depth of both conductor parts and at the same time to space the ends of both conductor parts apart to form the accommodating space. How to connect. 13. The method of claim 12,
Conductor connection method of a power cable, characterized in that it is carried out so that the energizing bolt fastened in the energizing step of the conductor part is in contact with the ends of both conductor parts and the conductor particles. 13. The method of claim 12,
The fixing bolt and the energizing bolt are breaking bolts, and the conducting part fixing step and the conducting part energizing step include a fixing bolt and a energizing bolt so that the fixing bolt and the energizing bolt are not exposed to the outer circumferential surface of the sleeve member. A method for connecting a conductor of a power cable, characterized in that it is fastened by breaking the head. A power cable conductor connecting device for connecting a pair of conductor parts composed of a plurality of wires of a power cable to each other,
It is in the form of a pipe with both ends open, a plurality of fixing fastening holes formed at predetermined intervals along the circumferential direction and the plurality of fixing fastening holes formed to be crossed with each other in the longitudinal direction, but formed at predetermined intervals along the circumferential direction a sleeve member having a fastening hole;
at least one energizing bolt fastened to the energizing fastening hole to electrically connect the pair of conductors;
at least one fixing bolt fastened to the fixing fastening hole to fix the conductor part accommodated in the sleeve member; and
A power cable conductor connecting device comprising a; a plurality of conductor particles accommodated in the receiving space formed at a position corresponding to the coupling hole for electricity supply of the sleeve member to electrically connect the pair of conductor parts. 17. The method of claim 16,
The conductor connecting device of the power cable, characterized in that the energizing bolt and the fixing bolt are breaking bolts including a head part that is broken and separated when a torque of a predetermined size or more is applied. 18. The method of claim 17,
The energizing bolt has a lower end portion and a body portion formed between the lower end portion and the head portion,
Power cable conductor connecting device, characterized in that the diameter of the body portion is greater than or equal to the maximum diameter of the lower end portion. 19. The method of claim 18,
The conductor connecting device of the power cable, characterized in that the maximum width of the conductor particle has a size of 5% to 20% of the maximum diameter of the lower end of the energizing bolt. 17. The method of claim 16,
The conductor particles are made of silver, copper, or an alloy material thereof, or a metal material plated with silver, copper, or an alloy material. 17. The method of claim 16,
The sleeve member is a conductor connection device for a power cable, characterized in that the tin-plated copper or tin-plated copper alloy material. 17. The method of claim 16,
The power cable conductor connection device, characterized in that the fixing bolt and the energizing bolt are made of brass or a brass alloy material.

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