KR20190108256A - Connecting Structure of Power Cable Conductor And Withdrawing Rod, Connecting Method Of The Same, and Connecting Device Of The Same - Google Patents

Abstract

The present invention relates to a connection structure of a power cable and a conductor drawing rod, a method of connecting a power cable and a conductor drawing rod, and a connection device of a power cable and a conductor drawing rod to minimize electrical resistance of a contact surface and improve workability.

Description

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

The present invention relates to a connection structure of a power cable and a conductor lead-out rod, a method of connecting the power cable and a conductor lead-out rod, and a connection device of the power cable and the conductor lead-out rod. More specifically, the present invention relates to a connection structure of a power cable and a conductor lead-out rod, a method of connecting the power cable and a conductor lead-out rod, and a connection device of the power cable and the conductor lead-out rod to minimize electrical resistance of the contact surface and improve workability.

In general, a power cable is used to supply power to a desired place through the ground, the ground or the sea floor by using a conductor that supplies the power. Such a power cable is very important to insulate the conductor. For this purpose, the insulating layer for insulating the conductor is made of XLPE (cross-linked polyethylene) or the like, or wound with insulating paper to form an insulating layer. I use it.

The power cables are connected by joint boxes at intervals of several hundred meters or tens of kilometers, and the ends of the power cables are connected to overhead lines by termination connections boxes.

The intermediate junction box may include a tape junction box (TJ), a prefabricated junction box (PJ), a pre-mold junction box (PMJ), a heterogeneous junction box, and the terminating junction box is connected to a derived conductor end of a cable. There are air termination boxes (EB-A), gas termination boxes (EB-G), and oil termination boxes (EB-O).

The air termination box (EB-A) is used for interconnecting overhead lines and underground lines in an outdoor substation for outdoor use, and the gas termination box (EB-G) is mainly installed in an indoor substation and has a narrow or other structure. It is used when the distance and the separation distance is restricted, and the oil end junction box (EB-O) is similar to the gas end junction box and is used when connecting the cable and the transformer in the oil case.

The end junction box may be provided with a conductor pipe in which the insulating oil (Oil) is stored, the power cable is inserted into the tube, one end is fixed to the conductor portion inside the power cable and the other end is a conductor withdrawing rod exposed to the outside of the tube. .

When connecting the power cable and the conductor lead rod of the termination box, conventionally, the insulation layer of each element wire constituting the conductor portion is removed and assembled again to bring the power cable connected to the conductor lead rod of the termination box into contact with each other and then crimped. Etc. were used.

However, the method of removing the insulation layer of each wire constituting the conductor part and reassembling it to connect the conductor cable with the conductor cable of the terminal box by crimping method takes a long time and the conductive material in the stripping process of the insulation layer. There is a problem that it has a potential quality risk due to the scattering of, and requires considerable work proficiency.

An object of the present invention is to provide a connection device for a power cable and a conductor lead-out rod having a space in which a conductor particle can be accommodated on a contact surface with the power cable.

In addition, the present invention by injecting the conductive particles into the contact surface between the conductor portion of the power cable and the connecting device of the power cable and the conductor lead-out rod, the connection structure of the power cable and the conductor lead-out rod that can minimize the electrical resistance of the contact surface and the power cable and conductor lead-out It is an object of the present invention to provide a rod connecting method.

In addition, the present invention is to solve the problem to provide a connection device of the power cable and the conductor lead-out rod, the connection structure of the power cable and the conductor lead-out rod, and the connection method of the power cable and the conductor lead-out rod that can easily inject the conductor particles into the contact surface. do.

In addition, the present invention by minimizing the distance between the conductor particles injected into the contact surface, the connection device of the power cable and conductor lead rod that can minimize the electrical resistance of the contact surface, the connection structure of the power cable and conductor lead rod, and the power cable and conductor lead out It is an object of the present invention to provide a rod connecting method.

In order to solve the above problems, the present invention provides a connection structure of a power cable and a conductor lead rod connecting a conductor portion composed of a plurality of element wires of a power cable to a conductor lead rod of a terminal box.

A conductor portion of the power cable; A conductor drawing rod provided with a receiving groove into which the conductor portion of the power cable is inserted through an opening of a lower end portion, and having a plurality of fastening holes; A plurality of conductor particles inserted into an accommodating space above the upper end of the conductor part inserted into the receiving groove of the conductor extracting rod to electrically connect the conductor portion and the conductor extracting rod; At least one electrification bolt fastened to the fastening hole to electrically connect the conductor part and the conductor withdrawing rod by pressing the conductor particles introduced into the accommodation space; And a fixing bolt fastened to the fastening hole to fix the conductor part inserted into the receiving groove, thereby providing a connection structure between the power cable and the conductor drawing rod.

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

In addition, when the conductive bolt is fastened in the state in which the conductive particles are inserted into the receiving space, the conductive bolt may be contacted with the conductor particles having a reduced pore by being compressed by the upper end of the conductive portion and the conductive bolt. .

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

Here, the conductor particles may be configured by silver plating a cut copper wire or a cut copper wire.

In this case, the conductor withdrawing rod may be made of tin plated copper or tin plated copper alloy.

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

The conductor withdrawing rod has a body portion providing an accommodation groove into which an upper end portion of the conductor portion is inserted, and an extension portion extending upwardly from an upper end portion of the body portion to an upper portion of the conductor portion. A plurality of power supply fastening holes to which a plurality of power supply bolts are fastened may be formed at predetermined intervals along the circumferential direction.

Here, a plurality of fixing fastening holes to which a plurality of fixing bolts are fastened may be formed at predetermined intervals in the circumferential direction under the body portion.

In addition, the fastening hole for electricity and the fastening hole for fixing may be formed to cross each other in the vertical direction of the body portion.

In addition, the upper portion of the body portion may be provided with a plurality of injection bolts are fastened and the injection fastening hole is formed to be inclined downward toward the receiving space.

Then, the conductive particles may be injected toward the receiving space through the injection fastening hole.

Here, the conductor drawing rod may further include an inclined connection portion connecting the body portion and the extension portion, and the injection coupling hole may be formed in the inclined connection portion.

In addition, in order to solve the above problems, the present invention, in the connection structure of the power cable and the conductor lead rod connecting the conductor portion consisting of a plurality of element wires of the power cable with the conductor lead rod of the terminal box, the conductor lead with a plurality of fastening holes A conductor part insertion step of inserting the conductor part of the power cable through the opening of the lower end of the rod; A conductor particle input step of introducing a plurality of conductor particles into the receiving space between the upper end of the conductor portion and the conductor withdrawing rod; A conductor portion fixing step of fixing the conductor portion by fastening a fixing bolt to the conductor drawing rod; And a conductor part for fastening a current-carrying bolt to the conductor drawing rod to reduce the voids of the conductor particles introduced in the conductor particle feeding step, and electrically connecting the conductor portion and the conductor drawing rod through the compressed conductor particles. It can provide a method for connecting the power cable and the conductor withdrawal rod comprising a conduction step.

In this case, the step of inserting the conductor part temporarily tightens at least one current-carrying bolt to the conductor withdrawing rod to limit the insertion height of the conductor part inserted into the receiving groove, and at the same time, the upper end of the conductor part and the ceiling of the receiving groove. The receiving space may be formed by spaced apart from each other.

In addition, the inserting of the conductor part may include temporarily tightening at least one current-carrying bolt to the conductor drawing rod, disposing a spacer having a predetermined height at an end of the insulating layer of the power cable, and the power cable. In the case of inserting the conductor portion of the conductor drawing rod into the receiving groove of the conductor drawing rod may further include the step of seating on the top surface of the spacer to determine the height of the receiving space.

In the conductive particle input step, the conductive particle is introduced through an injection fastening hole formed to be inclined downward toward the receiving space, and the conductor drawing rod is lowered by its own weight by separating the spacer from the power cable. At the same time, the end of the current-carrying bolt temporarily fastened to the conductor withdrawal rod is caught by the upper end of the conductor portion, and the height at which the conductor withdrawal rod descends is limited, thereby reducing and compressing the voids of the conductor particles introduced into the receiving space. It may include.

Here, the conductive particles may be introduced through the injection fastening hole formed to be inclined downward toward the receiving space in the conductive particle input step.

In addition, the conduction bolt fastened in the conducting portion of the conductor portion may be performed to be in contact with the upper end and the conductor particles of the conductor portion.

In this case, the fixing bolt and the energizing bolt are broken bolts, and the fixing of the conductor part and the energizing part of the conductor part are performed by fixing bolts and the electricity supply bolts so as not to be exposed to the outer circumferential surface of the conductor withdrawing rod. The head part of the electricity supply bolt can be broken and fastened.

In addition, in order to solve the above problems, the present invention is a power cable conductor connection device for connecting the conductor portion of the power cable to the conductor lead rod of the terminal box, the lower end is opened, the receiving groove in which the upper end portion of the conductor portion is inserted inside And a plurality of conductive fastening holes formed at predetermined intervals along the circumferential direction, and a conductor withdrawing rod having fastening holes formed at predetermined intervals along the circumferential direction at a lower portion of the plurality of electrical fastening holes. ; At least one electricity supply bolt fastened to the fastening hole for electricity transmission to electrically connect the conductor part to the conductor drawing rod; At least one fixing bolt fastened to the fixing fastening hole to fix the conductor part accommodated in the receiving groove of the conductor drawing rod; And a plurality of conductor particles accommodated in an accommodation space between the upper end of the conductor portion and the ceiling of the accommodation groove to electrically connect the conductor portion and the conductor withdrawing rod. Can provide.

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 thereto.

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

In addition, the conductor withdrawing rod may be made of tin plated copper or tin plated copper alloy.

In this case, the fixing bolt and the energizing bolt may be made of brass or brass alloy.

In addition, the conductor withdrawing rod may further include a plurality of injection bolts are fastened and the injection fastening hole is formed to be inclined downward toward the receiving space.

Then, the conductive particles may be injected toward the receiving space through the injection fastening hole.

The present invention injects the conductive particles into the contact surface between the conductor portion of the power cable and the connecting device of the power cable and the conductor lead-out rod, thereby minimizing the electrical resistance of the contact surface and improving the workability, the connection structure of the power cable and the conductor lead-out rod and the power cable and It is possible to provide a connection method of the conductor withdrawing rod.

Moreover, according to this invention, the connection device of the electric power cable and the conductor lead-out rod which can inject | pour a conductor particle to a contact surface easily, the connection structure of the electric power cable and the conductor lead-out rod, and the method of connecting the electric power cable and the conductor lead-out rod can be provided.

In addition, according to the present invention, by minimizing the distance between the conductor particles injected into the contact surface, the connection device of the power cable and the conductor lead rod that can minimize the electrical resistance of the contact surface, the connection structure of the power cable and the conductor lead rod, and the power cable It is possible to provide a connection method of the conductor withdrawing rod.

Figure 1 is a side cross-sectional view showing a structure according to an embodiment of the termination box of the present invention.
2 is a cross-sectional view showing a structure according to an embodiment of a power cable of the present invention.
3 is a side cross-sectional view showing a conductor connection structure according to an embodiment of the present invention.
4 to 7 are diagrams sequentially illustrating a conductor connection method according to an embodiment of the present invention.
8 is a side sectional view showing a conductor connecting structure according to another embodiment of the present invention.
9 to 12 are diagrams sequentially illustrating a conductor connection method according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and to fully convey the spirit of the present invention to those skilled in the art. Like numbers refer to like elements throughout.

1 illustrates an example of a termination box 1000 provided with a power cable and a conductor connecting device. Hereinafter, the present invention will be described based on the structure of the air terminal junction box. However, the present invention provides a power cable conductor connection device, a connection structure of a power cable and a conductor lead-out rod, and a method of connecting the power cable and conductor lead-out rod to a gas termination box (EB-). It can be applied to various junction boxes including G).

Termination box 1000 of Figure 1 is a coronal tube (1) for providing a space for storing the insulating oil 13, the power cable 100 and the one end is electrically connected to the other end of the power cable 100 and the other end Includes a conductor withdrawing rod 70 exposed to the outside of the love tube 1.

The love pipe 1 may be provided in various shapes capable of storing the insulating oil 13. In Figure 1, the tube 1 is a hollow tube body having an empty inside, an upper bracket 14 coupled to the tube body to form an upper surface of the tube body, and coupled to the tube body to the lower portion of the tube body. It may be provided as a lower bracket 15 forming a surface. The insulating oil 13 serves to electrically insulate the power cable 100 from the inner circumferential surface of the tube 1.

The power cable 100 penetrates through the lower bracket 15 and is fixed to the love pipe 1. That is, the love pipe 1 serves to insulate and support the power cable 100. Therefore, the pipe 1 needs an electrical insulation strength sufficient, and for this purpose, a plurality of wrinkles or protrusions 11 are provided on the circumferential surface of the pipe 1. Increasing the insulation distance by the pleats or protrusions 11 improves the dielectric strength. The pipe 1 is preferably manufactured using a hard magnetic or polymer resin to have a dielectric strength and at the same time maintain a moderate level of strength.

The power cable 100 is provided to penetrate the lower bracket 15 and is fixed to the love pipe 1, and an upper end of the power cable 100 located inside the love pipe 1 is connected to the love pipe 1. It is connected to the conductor withdrawing rod 70 provided as a conductor at the top.

As shown in FIG. 2, the power cable 100 that can be connected by the conductor connection structure according to the present invention includes a conductor portion 10, an inner semiconducting layer 20 surrounding the conductor portion 10, and the inside thereof. An insulating layer 30 surrounding the semiconducting layer 20, an outer semiconducting layer 40 surrounding the insulating layer 30, and an outer semiconducting layer 40, which are made of a metal sheath or a neutral wire, and are electrically shielded and return to a short circuit current. For the shielding layer 50, it may include a shell 60 surrounding the shielding layer (50).

The conductor part 10 may be formed of a stranded wire in which a single wire or a plurality of conductor wires made of copper, aluminum, and preferably copper are associated with each other, and the diameter of the conductor part 10 and the stranded wire 11 constituting the stranded wire. The standard including the diameter may be different depending on the transmission voltage, the use, etc. of the power cable 100 including the same, and may be appropriately selected by the designer. When the conductor part 10 is provided with a plurality of element wires 11 and each element wire 11 is provided in an insulated state, the amount of power transmission can be maximized by reducing the conductor resistance due to the skin effect.

The internal semiconducting layer 20 constituting the power cable 100 is disposed between the conductor portion 10 and the insulating layer 30 to lift the interlayers of the conductor portion 10 and the insulating layer 30. It removes the air layer that causes it, and alleviates local electric field concentration.

On the other hand, the outer semiconducting layer 40 performs a function of applying an even electric field to the insulating layer 30, localized electric field concentration relaxation and the function of protecting the insulating layer from the outside.

The inner semiconducting layer 20 and the outer semiconducting layer 40 have conductive particles such as carbon black, carbon nanotubes, carbon nanoplates, graphite, and the like dispersed in a base resin, and further include a crosslinking agent, an antioxidant, a scorch inhibitor, and the like. It is formed by extrusion of the added semiconducting composition.

Here, the base resin is of a similar type to that of the base resin of the insulating composition for forming the insulating layer 30 for the interlayer adhesion between the inner semiconducting layer 20 and the outer semiconducting layer 40 and the insulating layer 30. Olefin resins can be used.

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

The polyethylene resin may be applied to ultra low density polyethylene (ULDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE) and the like, in the case of a high-pressure cable Cables are quickly being replaced by crosslinked polyethylene (XLPE) insulated cables.

The outer shell 60 provided at the outermost portion of the cable may be made of any one of polyethylene, polyvinyl chloride, and polyurethane.

Referring to FIG. 1 again, the above-described power cable 100 penetrates through the lower bracket 15 so that its distal end is located in the inner pipe 1, and the power cable located in the inner pipe 1 ( The conductor portion 10 is exposed at the distal end of 100).

That is, the end of the power cable 100 located in the inner pipe (1) is the outer shell 60, shielding layer 50, outer semiconducting layer 40, insulating layer surrounding the conductor portion 10 ( 30) and the inner semiconducting layer 20 are removed to expose the distal end of the conductor portion 10.

On the other hand, except for the end of the power cable 100, the power cable 100 may be inserted into the tube 1 with the insulating layer 30 and the external semiconducting layer 40 exposed. That is, as shown in FIG. 1, the power cable 100 has the conductor portion 10, the insulating layer 30, and the outer semiconducting layer 40 exposed to the inside of the tube 1. It can be fixed to the love pipe (1).

When the power cable 100 in which a part of the outer semiconducting layer 40 is removed to expose the insulating layer 30 is inserted into the tube 1, a voltage is applied between the inner semiconducting layer. If so, the electric field may be concentrated at the end of the outer semiconducting layer 40. This may cause breakage of the outer semiconducting layer 40 and the insulating layer 30. Therefore, the inside of the love pipe (1) may be provided with an electric field relaxation cone 170 to relax the electric field concentration of the power cable 100.

The field relaxation cone 170 may be provided as a semiconducting portion 173 connected to the outer semiconducting layer 40 of the power cable 100 and an insulating portion 171 surrounding the semiconducting portion 173. The insulation part 171 provided at the outer side of the field relaxation cone 170 may be made of liquid silicone rubber (LSR) as an example, and is provided at the outer side of the field relaxation cone 170 to secure insulation performance. Done.

The conductor drawing bar 70 is provided to penetrate the upper bracket 14 so that the lower end is coupled to the distal end of the conductor part 10 and the upper end corresponds to a conductive member exposed to the outside of the conduit 1. .

Conventionally, when connecting the wire insulated power cable 100 having the configuration as described above, the insulation of the wires is removed, the conductor portion 10 of the cable is inserted into the conductor lead rod, and the conductor lead rod is crimped and connected. Although the present invention is used, the present invention inserts the conductor portion 10 of the cable connected in the conductor lead-out rod 70 and injects conductor particles (mp) into the center thereof, as described later. And the conductor part 10 and the conductor withdrawing rod 70 may be electrically connected to each other. Detailed description thereof will be described below with reference to the accompanying drawings.

3 is a side cross-sectional view showing a conductor connection structure according to an embodiment of the present invention.

First, the power cable 100 that can be connected by the connection structure of the power cable 100 according to the present invention, as shown in Figure 2, the conductor portion 10, the inner semiconducting layer surrounding the conductor portion 10 20, an insulating layer 30 surrounding the inner semiconducting layer 20, an outer semiconducting layer 40 surrounding the insulating layer 30, and an outer semiconducting layer 40, the metal sheath or a neutral wire It may include a shielding layer 50 for shielding and the return of the short-circuit current, the outer shell 60 surrounding the shielding layer 50 and the like.

In addition, the power cable conductor connection device for connecting the conductor portion 10 composed of a plurality of element wires of the power cable 100 according to the present invention in the terminal box is open at the lower end and the upper end of the conductor part 10 is located inside. It is provided with a receiving groove (71a) (see Fig. 5) to be inserted, a plurality of energizing fastening holes 710 formed at a predetermined interval along the circumferential direction, and the circumference at the lower portion of the plurality of energizing fastening holes 710 Conductor withdrawal bar 70 having a fixing fastening hole 730 formed at a predetermined interval along a direction, and fastened to the fastening hole 710 for electricity delivery, so that the conductor part 10 may be connected to the conductor withdrawing bar ( At least one electricity supply bolt 310 for electrically connecting to the 70 and the conductor portion 10 fastened to the fixing fastening hole 730 and received in the receiving groove 71a of the conductor withdrawing rod 70. At least one fixing bolt 330 for fixing the A plurality of conductor particles (mp) received in the receiving space between the upper end of the conductor portion 10 and the ceiling of the receiving groove 71a to electrically connect the conductor portion 10 and the conductor drawing rod 70. ) May be included. Here, the accommodation space means a space excluding an area in which the conductor part is inserted and occupied in the accommodation groove 71a.

Referring to FIG. 3, the conductor connection structure of the power cable 100 according to the present invention may include a conductor drawing rod 70 in which the conductor part 10 of the power cable 100 is inserted and electrically connected and fixed. Can be.

The conductor withdrawing rod 70 provides a receiving groove 71a into which the conductor portion 10 of the power cable 100 is inserted through an opening portion 711 (see FIG. 4) at the lower end, and includes a plurality of fastening holes ( 710 and 730 may be provided.

For example, as shown in FIG. 3, the conductor drawing bar 70 has an opening 711 formed at a lower end thereof to provide the receiving recess 71a into which the upper end of the conductor part 10 is inserted. A portion 71 and an extension portion 73 extending upward from the upper end of the body portion 71 may be provided.

The body portion 71 has an accommodating groove 71a formed therein so that the conductor portion 10 is inserted through the opening of the lower portion, and the extension portion 73 extending from the upper portion of the body portion 71 is described above. It can be exposed to the outside through the top of one termination box and connected to the overhead line.

In this case, the extension portion 73 may have a smaller diameter than the body portion 71, and in this case, the inclined connection portion 74 may be provided between the body portion 71 and the extension portion 73. Can be.

That is, the extension portion 73 is connected to the body portion 71 through the inclined connection portion 74, and the extension portion 73 toward the body portion 71 through the inclined connection portion 74. The outer diameter becomes large.

In this case, the conductor drawing bar 70 may be made of a metal member having excellent electrical conductivity. For example, the conductor drawing bar 70 may be made of tin plated copper or tin plated copper alloy.

In addition, a fastening hole for fastening a plurality of bolts may be provided in the body part 71 of the conductor drawing bar 70.

Specifically, the plurality of power supply fastening holes 710 to which the plurality of power supply bolts 310 are fastened may be formed at predetermined intervals along the circumferential direction on the upper portion of the body portion 71.

Among the plurality of fastening holes formed in the body part 71, the fastening hole formed in the upper part of the body part 71 has a conductor part 10 of a cable connected to the inner side of the receiving groove 71 a of the body part 71. Pressing the conductor particles (mp) injected into the receiving space formed between the conductor portion 10 and the ceiling of the receiving groove (71a) in the inserted state to electrically connect the conductor portion 10 and the conductor withdrawing rod 70. An electricity supply fastening hole 710 to which the electricity supply bolt 310 for connection is fastened.

In addition, a plurality of fixing fastening holes 730 to which the plurality of fixing bolts 330 are fastened to the lower portion of the body part 71 may be formed at predetermined intervals along the circumferential direction.

Among the plurality of fastening holes formed in the body part 71, the fastening hole formed in the lower part of the body part 71, that is, the lower part of the fastening hole 710 for electricity transmission, is connected to the conductor part 10 of the cable. It is a fastening hole 730 for fastening the fixing bolt 330 in the state inserted into the portion 71 to connect and fix the conductor portion 10 and the conductor withdrawing rod 70 to each other.

When the fixing bolt 330 is fastened to the fixing fastening hole 730, the conductor part 10 may be plastically deformed or penetrated through the fastening part so that the conductor drawing rod 70 extends in the longitudinal direction, or in FIG. 3. Movement of the conductor part 10 in the vertical direction may be blocked.

3. The fastening hole 710 for the electricity supply to which the energizing bolt 310 shown in FIG. 3 is fastened may be formed at a position corresponding to the conductor particle (mp) receiving space in the upper portion of the body portion 71. Therefore, the plurality of fastening holes 710 may be formed at predetermined intervals along the circumference of the upper portion of the body portion 71.

In addition, each fixing fastening hole 730 is also located at the lower region of the body portion 71, that is, at a predetermined interval in the longitudinal direction of the body portion 71 in the region below the fastening hole 710 for the electricity transmission. At a predetermined interval along the circumference of each position.

In this case, as shown in FIG. 3, adjacent fastening holes may be alternately formed in the longitudinal direction of the body portion 71 or in the vertical direction of the body portion 71. This is to disperse the fixing effect of the fixing bolt 330 to the entire conductor portion 10, so that the compression effect of the conductor particles (mp) by the energizing bolt 310 is not concentrated in a specific region.

The energizing bolt 310 may be configured to include a head portion and a threaded body portion to which torque is applied to the tool. The head portion is an area that is broken when the fastening is completed, the body portion is configured to enter into the body portion when the fastening is completed.

Specifically, the electricity supply bolt 310 has a head portion that is broken and separated when a torque of a predetermined size or more is applied, and the 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. At this time, the diameter of the body portion may be greater than the maximum diameter of the lower end.

As will be described later, the lower end portion of the electricity supply bolt 310 restricts the insertion height of the conductor portion 10 in the receiving groove 71a of the body portion 71 to the upper end portion of the conductor portion 10. Between the ceiling of the receiving groove (71a) to form the receiving space in which the conductor particles (mp) can be accommodated.

Therefore, the width of the accommodation space is configured to be smaller than the width of the body portion formed with the thread of the through-hole bolt 310 by the diameter of the lower end, preferably the maximum diameter of the lower end. In this case, when the conductive bolt 310 is fastened in the state in which the conductor particles (mp) are inserted into the accommodation space, the electricity supply bolt 310 is press-fitted between the conductor portion 10 and the ceiling of the accommodation space. At the same time as being fastened, it can be compressed by the energizing bolts so that the voids come into contact with the reduced conductor particles.

In addition, each bolt fastening hole is formed with a screw thread may be able to adjust the tightening force according to the fastening depth of the bolt for power supply 310 and the fixing bolt 330. As will be described later, the energizing bolt 310 and the fixing bolt 330 may be composed of a broken bolt that the head is broken when a force of a predetermined size or more is applied.

The reason for configuring the electricity supply bolt 310 and the fixing bolt 330 as a break bolt is that the connection structure of the power cable 100 according to the present invention should be accommodated in the terminal junction box, and the insulating oil outside the connection structure. This is because the back is charged and it is difficult for the bolt head or the like to protrude to the surface of the conductor drawing rod 70 connected to the end of the power cable 100 for the purpose of preventing electric field concentration.

In this case, the fixing bolt 330 and the electricity supply bolt 310 may be made of brass or brass alloy material.

Hereinafter, a conductor connection method of the conductor connection structure having the above-described structure will be described with reference to the drawings.

4 to 7 are diagrams sequentially illustrating a conductor connection method according to an embodiment of the present invention.

The conductor connecting method of the power cable 100 according to an embodiment of the present invention accommodates the conductor lead-out rod 70 through an opening 711 of the lower end of the conductor lead-out rod 70 having a plurality of fastening holes. A conductor part inserting step of inserting the conductor part 10 of the power cable 100 into the groove 71a, and a plurality of accommodation spaces between the upper end of the conductor part 10 and the receiving groove 71a. Conductor particle input step of injecting conductor particles (mp), conductor part fixing step of fixing the conductor part 10 by fastening the fixing bolt 330 to the conductor withdrawing rod 70 and the conductor withdrawing rod ( 70) by tightening the electricity supply bolt 310 to reduce the voids of the conductor particles (mp) introduced in the conductor particle input step, and compress, and the conductor portion 10 and the conductor withdrawal through the compressed conductor particles (mp) It may include a conductive part conducting step of electrically connecting the rod (70).

In the conductor connection structure of the power cable 100 according to the present invention, a separate conductor particle (mp) is inserted into an accommodation space between the conductor portion 10 and the accommodation groove of the connection target cable inserted into the conductor lead-out rod 70. Then, the conductive part 310 of the cable is electrically connected to the conductor lead-out rod by fastening the energizing bolt 310 inward to reduce the gap between the conductor particles mp. The method of directly contacting the conductor part 10 of the power cable with the conductor drawing rod is not easy to uniform surface contact of the end of the conductor part 10, which inevitably increases the resistance, and the method of compressing after peeling the insulating film. Is much more time consuming.

However, the conductor connection structure of the power cable 100 according to the present invention, after inserting the conductor portion 10 of the power cable 100 through the opening of the lower end of the conductor lead rod 70 fixing bolt 330 ) To fasten the conductor part 10, and after the fixing of the conductor part 10 is completed, the conductor particles (mp) are injected into the space of the receiving groove 71a in the upper part of the conductor part 10, and then The bolt 310 is fastened to minimize voids between the conductor particles (mp), and the conductor particles (mp) complete electrical connection between the conductor portion 10 and the conductor lead-out rod 70 of the cable to be connected to the power cable ( 100) can be completed. A process of forming a connection structure of the power cable 100 according to the present invention will be described.

First, as shown in FIG. 4, a temporary bolt 310 may be temporarily installed in at least one of the fastening holes 710 of the plurality of energizing fastening holes 710 formed on the body part 71. And a spacer 78 having a predetermined height at the end of the insulating layer 30 of the power cable 100, and then the conductor portion 10 of the cable to be connected is connected to the lower end of the body portion 71. A conductor part insertion step of inserting into the receiving groove 71a inside the body part 71 may be performed through the opening 711.

Here, the temporary fastening refers to a weak fastening state in which the bolt head is not broken, and the electric bolt 310 passes through the electric fastening hole 710 so that the lower end of the electric bolt 310 is accommodated. A state in which the predetermined length protrudes into the groove 71a may be defined as a temporary fastening state. In this case, the electricity supply fastening hole 710 to which the electricity supply bolt 310 is temporarily fastened corresponds to a state blocked by the electricity supply bolt 310, and thus, the aforementioned conductive particles mp are fastened to the electricity supply. It can be seen in a state that does not leak through the hole 710.

Although not shown in the drawing, the fixing bolt 330 may be temporarily fastened to the fixing fastening hole 730 in the state in which the conductor part 10 is inserted into the body part 71. When the main fastening of the head part of the fixing bolt 330 is broken, plastic deformation of the conductor part 10 by the fixing bolt 330 occurs, and conductor wires are introduced into the receiving space so that the conductor particles (mp This is because interference and interference may occur.

As shown in FIG. 4, at least one fastening hole of the plurality of fastening holes 710 for the electricity supply is left for the input of the conductor particles (mp), and the at least one fastening hole performs the stopper function. The dedicated bolt 310 may be fastened to protrude inward, and the remaining bolt for energization 310 may also be fastened to prevent the loss of the conductor particles mp in the process of injecting the conductor particles mp, which will be described later. Temporary tightening on

Therefore, as shown in FIG. 5, the conductor portion 10 is moved into the receiving groove 71a in a state where the spacer 78 is disposed at the upper end of the insulating layer 30 of the power cable 100. When inserted, the lower end of the conductor withdrawing rod 70 is seated on the upper surface of the spacer 78 to determine the insertion height of the conductor portion 10, and thus the housing particle (mp) is accommodated therein. The height of the space can be determined.

In this case, the height H1 of the accommodation space in the state where the spacer 78 is disposed is compared with the height H2 of the accommodation space in the state where the spacer 78 is separated and removed as shown in FIG. 6. The height of the spacer 78 can be determined to be relatively higher.

That is, the inner volume of the accommodating space in the state where the spacer 78 is disposed becomes relatively larger than the internal volume of the accommodating space in the state where the spacer 78 is separated and removed.

In this case, in the state in which the spacer 78 is arranged as shown in FIG. 5, the conductor is inward of the accommodation space through any one of the fastening holes 710 for which the electric bolts 310 are not fastened. A conductor particle dosing step for dosing particle (mp) may be performed.

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

Therefore, 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 plating silver, copper alloy plating silver, copper plating silver alloy, copper Alloy plating may be made of various materials such as alloys. In addition, the material of the plurality of conductor particles (mp) may be composed of copper or an alloy thereof, or may be composed of various combinations as long as it is a metal material plated with silver, copper, or an alloy thereof.

After the conductive particles (mp) are injected, the conductive bolts 310 may be temporarily fastened to the fastening holes 710 for the conductive holes left for the conductive particles (mp).

Subsequently, as shown in FIG. 6, the spacer 78 is removed from the power cable 100.

In this case, the reason for temporarily tightening the fastening hole 710 of the energization fastening hole 710 with the power supply bolt 310 before removing the spacer 78 is to remove the spacer 78 as shown in FIG. This is because when the conductor drawing bar 70 descends by a predetermined height due to its own weight of 70, the conductor particles mp may be compressed and leak through the energizing fastening hole 710.

At this time, since the lower end of the conduction bolt 310 protrudes into the receiving groove 71a so as to perform a stopper function when the conductor drawing bar 70 descends, the conduction bolt 310 is connected to the conduction bolt 310. When the upper end of the conductor portion 10 is in contact with the lowering of the conductor withdrawing rod 70 is stopped, the falling height of the conductor withdrawing rod 70 is determined.

In this case, as described above, since the internal volume of the receiving space in which the spacer 78 is separated and removed is relatively smaller than the internal volume of the receiving space in the state where the spacer 78 is disposed, the When the spacer 78 is removed, the conductor particles mp inside the accommodation space may be compressed to minimize the gap between the conductor particles mp.

Although not shown in the drawing, the conductor part 10 may be inserted into the body part 71 while the spacer is omitted in the aforementioned step of inserting the conductor part.

In this case, the conductor part 10 which is temporarily inserted to serve as a stopper to the fastening hole 710 of the conductive drawing rod 70 of the conductive drawing rod 70 is inserted into the receiving groove 71a. At the same time as limiting the insertion height of the can be formed by separating the upper end of the conductor portion 10 and the ceiling of the receiving groove (71a).

On the other hand, as shown in Figure 8, the fixing bolt 330 is the body portion 71 of the conductor drawing rod 70 in a method of plastically deforming or penetrating the conductor of the conductor portion 10 in the present fastening process. And a conductor part fixing step of fixing the conductor part 10 may be performed.

That is, in the state in which the conductor particle (mp) is inserted into the receiving groove (71a), before the fastening the power supply bolt 310, the fixing bolt 330 to the fixing fastening hole 730 It is preferable to fasten this. This prevents the conductor portion 10 from being pushed in the direction in which the conductor portion 10 is separated from the body portion 71 by the pressure applied during the main fastening process of the electricity supply bolt 310, and the end side surface of the conductor portion 10 and the conductor particles. This is to strengthen the contact state of (mp).

The conductor particles (mp) may be made of a metal material, may be made of small metal particles, and the like, and in a simple injected state, a significant portion of voids may exist between the particles. However, as shown in FIG. 7, when the fastening of the energizing bolt 310 is completed as shown in FIG. 3 in the state in which the fastening of the fixing bolt 330 is completed, the gap between the conductor particles mp is formed. Since the contact area between the conductor particles and the end surface of the conductor particles and the end side of the conductor portion 10 is reduced or eliminated, contact resistance can be reduced. In this case, since the conductor drawing rod 70 and the conductor portion 10 are fixed by the fixing bolt 330, the conductor portion 10 is in the process of fastening the electricity supply bolt 310. It may not be pushed in the direction in which the body portion 71 is separated.

In addition, the electricity supply bolt 310 is a body fastening, it is preferable to be in direct contact with the end of the conductor portion (10). Specifically, the electricity supply bolt 310 has a body portion (threaded portion formed) between the lower end and the head portion, and formed so that the diameter of the body portion is greater than the maximum diameter of the lower end portion of the electricity supply bolt 310 Can be. Such a shape may be implemented by a method of configuring the shape of the lower end of the electricity supply bolt 310 in a hemispherical shape.

When the fixing bolt 330 is fastened as described above, the conductor particles (mp) are filled in the receiving space (S) formed at an upper end of the conductor part 10 spaced apart from the ceiling of the receiving space by a predetermined distance. The conductor portion 10 is fixed to the body portion 71 of the conductor withdrawing rod 70.

In the state in which the conductor part 10 is fixed to the body part 71 of the conductor drawing bar 70, the electricity supply bolt 310 is fastened to the body part 71 of the conductor drawing bar 70. The conductive part conducting step of reducing the voids of the conductive particles introduced in the conductive particle input step, and electrically connecting the end of the conductive lead rod 70 and the conductive part 10 through the compressed conductive particles may be performed. have.

The conductive part energizing step is such that the energizing bolt 310 is fastened by the upper end of the conductor part 10 and the energizing bolt 310 to be in contact with the conductor particles (mp) having a reduced void. Can be.

Specifically, when the main body bolt 310 is connected to the main body, the main power bolt 310 enters into the receiving groove 71a of the body portion 71 and presses the conductor particles mp. At the same time, the body portion of the electrical service bolt 310 may be in contact with the conductor portion 10 and the ceiling of the accommodation space. Therefore, the conduction bolt can be diversified by directing the conduction bolt and the conductor part and the conductor withdrawing rod to be directly connected to the conductor end (surface) through the conduction bolt 310 together with the compressed conductor particles. .

Meanwhile, in the above-described embodiment, the conductor portion 10 is inserted into the body portion 71 of the conductor drawing rod 70 and accommodated between the upper end portion of the conductor portion 10 and the receiving groove 71a. When the conductive particles (mp) are introduced into the space, the conductive particles (mp) are introduced through the fastening holes 710 for conduction formed in the side of the receiving space.

In this case, since the conductor particles (mp) are introduced into the accommodation space from the side of the accommodation space, it is not easy to uniformly disperse the conductor particles (mp) in all areas of the accommodation space. It may be difficult to introduce the conductor particles (mp) to the top.

If the conductor particles (mp) are not introduced to the top of the accommodation space, the conductor particles (mp) may be inserted into the accommodation grooves even if the conductor particles (mp) are pressed by the current-carrying bolt (310). The ceiling of 71a), that is, the conductor drawing rod 70 may not be uniformly contacted. This causes a reduction in the contact area between the conductor part 10 and the conductor withdrawing rod 70 through the conductor particles mp, so that the contact resistance increases, which is not preferable.

8 illustrates a connection structure of a power cable and a conductor drawing rod according to another embodiment of the present invention for solving the above-described problem. In the following description, the same reference numerals are used for the same elements as compared with the above-described embodiments, and the differences will be described based on differences.

Referring to FIG. 8, the power cable conductor connecting device for connecting the conductor part 10 composed of a plurality of element wires of the power cable 100 according to the present embodiment includes a conductor drawing rod 70. The conductor withdrawing rod 70 according to the present embodiment is formed on the upper portion of the body portion 71, and the plurality of energization bolts 310 are fastened and formed to be inclined downward toward the accommodation space. The hole 740 may be further provided.

That is, in the case of the body portion 71 of the conductor drawing bar 70 according to the present embodiment may further include an injection fastening hole 740 formed by being inclined downward at a predetermined angle toward the receiving space.

The injection fastening hole 740 is formed along the outer circumferential surface of the conductor drawing bar 70 and may be formed by inclining downward at a predetermined angle toward the receiving space.

Therefore, when the conductive particles (mp) are introduced through the injection coupling hole 740, the injection particles are injected through the injection coupling hole 740 inclined at a predetermined angle from the upper side of the accommodation space. Further, the conductor particles mp can be uniformly dispersed in the entire area of the accommodation space, and the conductor particles mp can be introduced to the top of the accommodation space.

In addition, in the case of fastening the current-carrying bolt 310 to the injection fastening hole 740, the conductive particles (mp) introduced into the receiving space together with the current-carrying bolt 310 fastened to the electric fastening hole 710. ) By additionally pressurizing to reduce the gap between the conductor particles (mp) as much as possible to reduce the contact resistance of the conductor portion 10 and the conductor withdrawing rod (70).

In this case, the injection fastening hole 740 is formed along the outer circumferential surface of the conductor drawing bar 70, and for example, an inclined connection portion 74 connecting the body portion 71 and the extension portion 73. Can be formed on.

That is, when the extension portion 73 has a smaller diameter than the body portion 71 may be provided with an inclined connection portion 74 between the body portion 71 and the extension portion 73, The injection fastening hole 740 may be formed in the inclined connection portion 74.

Hereinafter, a method of connecting the conductor connection structure according to the present embodiment will be described with reference to FIGS. 9 to 12.

The conductor connecting method includes the power cable 100 inside the receiving groove 71a of the conductor drawing bar 70 through the opening 711 of the lower end of the conductor drawing bar 70 having a plurality of fastening holes. A conductor part inserting step of inserting the conductor part 10 of the conductor part and a conductor particle input step of introducing a plurality of conductor particles (mp) into the receiving space between the upper end of the conductor part 10 and the receiving groove 71a; Fixing the conductor part 10 by fastening the fixing bolt 330 to the conductor withdrawing rod 70, and fastening the electricity supply bolt 310 to the conductor withdrawing rod 70 by Conductor part energizing step of reducing the gap of the conductor particles (mp) introduced in the conductor particle input step, and electrically connecting the conductor part 10 and the conductor withdrawing rod 70 through the compressed conductor particles (mp). It may include.

First, as shown in FIG. 9, the power supply bolt 100 may be temporarily fastened to all of the plurality of power supply fastening holes 710 formed in the upper portion of the body portion 71. The spacer 78 having a predetermined height is disposed at the end of the insulating layer 30, and then the conductor portion 10 of the cable to be connected is connected to the body portion through the opening portion 711 of the lower end portion of the body portion 71. (71) A conductor portion insertion step of inserting into the receiving groove 71a therein may be performed.

Although not shown in the drawing, the fixing bolt 330 may be temporarily fastened to the fixing fastening hole 730 in the state in which the conductor part 10 is inserted into the body part 71. When the main fastening of the head part of the fixing bolt 330 is broken, plastic deformation of the conductor part 10 by the fixing bolt 330 occurs, and conductor wires are introduced into the receiving space so that the conductor particles (mp This is because interference and interference may occur.

In addition, unlike the embodiment of FIGS. 4 to 7 described above, the bolts 310 for power supply are temporarily fastened to all of the plurality of fastening holes 710 for power supply, and at least one of the fastening holes performs a stopper function. The electricity supply bolt 310 may be fastened to protrude inward.

In the above-described embodiment, since the conductive particles (mp) must be injected through the fastening holes 710 for energizing formed in the side of the receiving space, at least one of the plurality of fastening holes for energizing 710 is formed of the conductive particles ( For the input of mp) it should be left open the fastening bolt 310 is not fastened.

However, in the present embodiment, since the injection fastening hole 740 is separately provided as described above, one of the fastening holes 710 for the energization of the conductive particles (mp) is left in an open state. There is no need.

On the other hand, as shown in Figure 10, the conductor portion 10 to the inside of the receiving groove (71a) in a state in which the spacer 78 is disposed on the upper end of the insulating layer 30 of the power cable 100. When inserted, the lower end of the conductor withdrawing rod 70 is seated on the upper surface of the spacer 78 to determine the insertion height of the conductor portion 10, and thus the housing particle (mp) is accommodated therein. The height of the space can be determined.

In this case, the height H3 of the accommodation space in the state where the spacer 78 is disposed is compared with the height H4 of the accommodation space in the state where the spacer 78 is separated and removed as shown in FIG. 11. The height of the spacer 78 can be determined to be relatively higher.

That is, the inner volume of the accommodating space in the state where the spacer 78 is disposed becomes relatively larger than the internal volume of the accommodating space in the state where the spacer 78 is separated and removed.

In this case, in the state where the spacer 78 is disposed as shown in FIG. 10, the conductor particles mp are injected into the accommodation space through the injection coupling hole 740.

In this case, the conductor particles (mp) are introduced into the entire area of the accommodation space because the conductor particles (mp) are introduced through the injection fastening hole 740 inclined at a predetermined angle from the top of the accommodation space downward. It is possible to uniformly disperse the particles, and further to inject the conductor particles (mp) up to the top of the receiving space.

Subsequently, as shown in FIG. 11, the spacer 78 is removed from the power cable 100.

At this time, since the lower end of the conduction bolt 310 protrudes into the receiving groove 71a so as to perform a stopper function when the conductor drawing bar 70 descends, the conduction bolt 310 is connected to the conduction bolt 310. When the upper end of the conductor portion 10 is in contact with the lowering of the conductor withdrawing rod 70 is stopped, the falling height of the conductor withdrawing rod 70 is determined.

In this case, as described above, since the internal volume of the receiving space in which the spacer 78 is separated and removed is relatively smaller than the internal volume of the receiving space in the state where the spacer 78 is disposed, the When the spacer 78 is removed, the conductor particles mp inside the accommodation space may be compressed to minimize the gap between the conductor particles mp.

Although not shown in the drawing, the conductor part 10 may be inserted into the body part 71 while the spacer is omitted in the aforementioned step of inserting the conductor part.

In this case, the conductor part 10 which is temporarily inserted to serve as a stopper to the fastening hole 710 of the conductive drawing rod 70 of the conductive drawing rod 70 is inserted into the receiving groove 71a. At the same time as limiting the insertion height of the can be formed by separating the upper end of the conductor portion 10 and the ceiling of the receiving groove (71a).

On the other hand, as shown in Figure 12, the body portion of the conductor withdrawal rod (70) by the method of plastic deformation or through the conductor of the conductor portion 10 using the fixing bolt 330 in the fastening process ( 71) and the conductor part fixing step of fixing the conductor part 10 may be performed.

That is, in the state in which the conductor particle (mp) is inserted into the receiving groove (71a), before the fastening the power supply bolt 310, the fixing bolt 330 to the fixing fastening hole 730 It is preferable to fasten this. This prevents the conductor portion 10 from being pushed in the direction in which the conductor portion 10 is separated from the body portion 71 by the pressure applied during the main fastening process of the electricity supply bolt 310, and the end side surface of the conductor portion 10 and the conductor particles. This is to strengthen the contact state of (mp).

The conductor particles (mp) may be made of a metal material, may be made of small metal particles, and the like, and in a simple injected state, a significant portion of voids may exist between the particles. However, as shown in FIG. 12, when the fastening of the energizing bolt 310 is completed while the fastening of the fixing bolt 330 is completed, the gap between the conductor particles mp is reduced or removed and the conductor is reduced. Since the contact area between the particles and the contact area between the conductor particles and the end side of the conductor portion 10 becomes wider, the contact resistance can be reduced. In this case, since the conductor drawing rod 70 and the conductor portion 10 are fixed by the fixing bolt 330, the conductor portion 10 is in the process of fastening the electricity supply bolt 310. It may not be pushed in the direction in which the body portion 71 is separated.

In addition, the electricity supply bolt 310 is a body fastening, it is preferable to be in direct contact with the end of the conductor portion (10). Specifically, the electricity supply bolt 310 has a body portion (threaded portion formed) between the lower end and the head portion, and formed so that the diameter of the body portion is greater than the maximum diameter of the lower end portion of the electricity supply bolt 310 Can be. Such a shape may be implemented by a method of configuring the shape of the lower end of the electricity supply bolt 310 in a hemispherical shape.

When the fixing bolt 330 is fastened as described above, the conductor particles (mp) are filled in the receiving space (S) formed at an upper end of the conductor part 10 spaced apart from the ceiling of the receiving space by a predetermined distance. The conductor portion 10 is fixed to the body portion 71 of the conductor withdrawing rod 70.

In the state in which the conductor part 10 is fixed to the body part 71 of the conductor drawing bar 70, the electricity supply bolt 310 is fastened to the body part 71 of the conductor drawing bar 70. The conductive part conducting step of reducing the voids of the conductive particles introduced in the conductive particle input step, and electrically connecting the end of the conductive lead rod 70 and the conductive part 10 through the compressed conductive particles may be performed. have.

In this case, in the step of energizing the conductor part 10, the fastening hole for injection (310) together with the step of fastening the current-carrying bolt 310 to the fastening hole 710 for power supply formed on the side of the receiving space 740 may include the step of fastening the power supply bolt 310.

The conductive particles 310 fastened to the fastening holes 710 of the conductive part in the conductive part energizing step is compressed by the upper end of the conductor portion 10 and the conductive bolt 310 to reduce the gap of the conductor particles (mp) can be contacted together.

Specifically, when the main body bolt 310 is connected to the main body, the main power bolt 310 enters into the receiving groove 71a of the body portion 71 and presses the conductor particles mp. At the same time, the body portion of the electrical service bolt 310 may be in contact with the conductor portion 10 and the ceiling of the accommodation space. Therefore, the conduction bolt can be diversified by directing the conduction bolt and the conductor part and the conductor withdrawing rod to be directly connected to the conductor end (surface) through the conduction bolt 310 together with the compressed conductor particles. .

In addition, as shown in FIG. 13, the bolt for energization 310 is further fastened to the injection fastening hole 740, together with the bolt for energization 310 fastened to the fastening hole 710. The conductor part 10 is further reduced by the additional pressurization of the conductor particles mp injected into the accommodation space by the energizing bolt 310 fastened to the injection fastening hole 740 to minimize the gap between the conductor particles mp. And the contact resistance of the conductor drawing bar 70 can be reduced.

Although the present specification has been described with reference to preferred embodiments of the invention, those skilled in the art may variously modify and change the invention without departing from the spirit and scope of the invention as set forth in the claims set forth below. Could be done. Therefore, it should be seen that all modifications included in the technical scope of the present invention are basically included in the scope of the claims of the present invention.

10: conductor part
70: conductor withdrawal rod
100: power cable
1000: junction box

Claims (27)

In the connection structure of the power cable and the conductor lead rod connecting the conductor portion composed of a plurality of element wires of the power cable to the conductor lead rod of the terminal box,
A conductor portion of the power cable;
A conductor drawing rod provided with a receiving groove into which the conductor portion of the power cable is inserted through an opening of a lower end portion, and having a plurality of fastening holes;
A plurality of conductor particles inserted into an accommodating space above the upper end of the conductor part inserted into the receiving groove of the conductor extracting rod to electrically connect the conductor portion and the conductor extracting rod;
At least one electrification bolt fastened to the fastening hole to electrically connect the conductor part and the conductor withdrawing rod by pressing the conductor particles introduced into the accommodation space; And
And a fixing bolt fastened to the fastening hole to fix the conductor part inserted into the receiving groove. The method of claim 1,
The power supply bolt and the fixing bolt are connected to the power cable and the conductor lead rod, characterized in that the head bolt is broken and separated when a torque of a predetermined size or more is applied. The method of claim 1,
When the conductive bolt is fastened in the state in which the conductive particles are inserted into the receiving space, the conductive bolt is pressed by the upper end of the conductive portion and the conductive bolt to be in contact with the conductive particles having reduced voids. Connection structure of power cable and conductor lead-out rod. The method of claim 1,
The conductor particles are made of silver, copper, or an alloy material thereof, or a connection structure between a power cable and a conductor drawing rod, characterized in that the metal is plated with silver, copper, or an alloy material thereof. The method of claim 4, wherein
The conductor particle is a connection structure of the power cable and the conductor lead-out rod, characterized in that configured by silver-plated cut copper wire or cut copper wire. The method of claim 1,
The conductor drawing rod is a connection structure of the power cable and the conductor drawing rod, characterized in that the tin-plated copper or tin-plated copper alloy material. The method of claim 1,
The fixing bolt and the current-carrying bolt is a connection structure of the power cable and the conductor lead-out rod, characterized in that the brass or brass alloy material. The method of claim 1,
The conductor withdrawing rod has a body portion providing an accommodation groove into which an upper end portion of the conductor portion is inserted, and an extension portion extending upwardly from an upper end portion of the body portion and having a plurality of openings formed at an upper end thereof. A connecting structure of a power cable and a conductor withdrawing rod, characterized in that a plurality of coupling fastening holes for fastening bolts are formed at predetermined intervals along the circumferential direction. The method of claim 8,
The lower portion of the body portion is a connection structure of the power cable and the conductor withdrawing rod, characterized in that a plurality of fixing fastening holes for fastening the plurality of fixing bolts are formed at predetermined intervals along the circumferential direction. The method of claim 9,
The fastening hole for the electricity supply and the fastening hole for fixing are connected to each other in the vertical direction of the body portion is formed, the power cable and the conductor drawout connecting structure. The method of claim 9,
The upper portion of the body portion is connected to the power cable and the conductor drawout rod, characterized in that it further comprises a fastening hole for injection is formed to be inclined downward toward the receiving space is fastened to the plurality of electrical bolts. The method of claim 11,
The connection structure of the power cable and the conductor lead-out rod, characterized in that the conductive particles are injected toward the receiving space through the injection fastening hole. The method of claim 11,
The conductor drawing rod further includes an inclined connection portion connecting the body portion and the extension portion, and the injection fastening hole is formed in the inclined connection portion. In the connection structure of the power cable and the conductor lead rod connecting the conductor portion composed of a plurality of element wires of the power cable to the conductor lead rod of the terminal box,
A conductor part inserting step of inserting a conductor part of the power cable through an opening of a lower end of the conductor withdrawing rod having a plurality of fastening holes;
A conductor particle input step of introducing a plurality of conductor particles into the receiving space between the upper end of the conductor portion and the conductor withdrawing rod;
A conductor portion fixing step of fixing the conductor portion by fastening a fixing bolt to the conductor drawing rod; And,
The conductor part energizing step of fastening the conduction bolt to the conductor withdrawing rod to reduce the voids of the conductor particles introduced in the conductor particle injecting step, and electrically connecting the conductor portion and the conductor withdrawing rod through the compressed conductor particles. Connection method of the power cable and the conductor lead-out rod including; The method of claim 14,
The conductor inserting step may temporarily tighten at least one current-carrying bolt to the conductor withdrawing rod to limit the insertion height of the conductor portion inserted into the receiving groove and to separate the upper end of the conductor portion from the ceiling of the receiving groove. A method of connecting a power cable and a conductor drawing rod, characterized in that to form the receiving space. The method of claim 14,
The conductor part inserting step
Temporarily fastening at least one current carrying bolt to the conductor drawing rod;
Disposing a spacer having a predetermined height at an end of the insulating layer of the power cable;
And inserting a lower end of the conductor lead-out rod into the upper end surface of the spacer when the conductor portion of the power cable is inserted into the receiving groove of the conductor lead-out rod, wherein the height of the accommodation space is determined. Method of connecting the conductor withdrawing rod. The method of claim 16,
The conductor particle input step
Injecting the conductor particles through the injection fastening hole formed to be inclined downward toward the accommodation space;
The spacer is separated from the power cable so that the conductor drawing rod descends due to its own weight, and at the same time, the end of the current-carrying bolt temporarily fastened to the conductor drawing rod is caught by the upper end of the conductor portion, thereby limiting the height at which the conductor drawing rod falls. And compressing by reducing the gap of the conductive particles introduced into the receiving space. The method of claim 14,
In the conductor particle input step
The method of connecting the power cable and the conductor withdrawal rod, characterized in that the conductive particles are introduced through the injection fastening hole formed to be inclined downward toward the receiving space. The method of claim 14,
The method of connecting the power cable and the conductor withdrawal rod, characterized in that the conduction bolt is fastened in the conduction step of the conductor portion is performed to contact the upper end and the conductor particles of the conductor portion. The method of claim 14,
The fixing bolt and the energizing bolt are break bolts, and the fixing of the conductor part and the conducting part of the conductor part are performed so that the fixing bolt and the electricity supply bolt are not exposed to the outer circumferential surface of the conductor withdrawing rod. The method of connecting the power cable and the conductor lead-out rod, characterized in that the fastening by breaking the head portion. In the power cable conductor connecting device for connecting the conductor portion of the power cable to the conductor lead rod of the termination box,
A lower end portion is opened to provide a receiving groove into which the upper end portion of the conductor is inserted, and includes a plurality of fastening holes formed at predetermined intervals along the circumferential direction, and the circumferential direction in the lower portion of the plurality of fastening holes in advance. A conductor drawing rod having a fixing fastening hole formed at a predetermined interval;
At least one electricity supply bolt fastened to the fastening hole for electricity transmission to electrically connect the conductor part to the conductor drawing rod;
At least one fixing bolt fastened to the fixing fastening hole to fix the conductor part accommodated in the receiving groove of the conductor drawing rod; And
And a plurality of conductor particles accommodated in an accommodation space between the upper end of the conductor portion and the ceiling of the receiving groove for electrically connecting the conductor portion and the conductor withdrawing rod. Device. The method of claim 21,
The power supply bolt and the fixing bolt are connected to the power cable and the conductor pullout rod, characterized in that the broken bolt including a head portion is broken apart when a torque of a predetermined size or more is applied. The method of claim 21,
The conductor particles are made of silver, copper or an alloy thereof, or a connection device of a power cable and a conductor drawing rod, characterized in that the metal is plated with silver, copper or an alloy thereof. The method of claim 21,
The conductor drawing rod is a connecting device of the power cable and the conductor drawing rod, characterized in that the tin-plated copper or tin-plated copper alloy material. The method of claim 21,
The fixing bolt and the current-carrying bolt is a connection device of the power cable and the conductor drawing rod, characterized in that the brass or brass alloy material. The method of claim 21,
And a plurality of injection bolts are fastened to the conductor withdrawing rod and further provided with an injection coupling hole formed to be inclined downward toward the accommodation space. The method of claim 26,
The connecting device of the power cable and the conductor withdrawal rod, characterized in that the conductive particles are injected toward the receiving space through the injection fastening hole.

Images