JPH11262154A - Lead wire connection structure for bushing of high-voltage distribution apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate removing of an old lead wire and mounting of a new lead wire, by so inserting a compatible connective-terminal bearing lead wire into the cone through hole of a cone made of a molded rubber as to further pierce through the protruding portion of the through hole of a porcelain insulator, and by connecting electrically the connector terminal portion of the end of the lead wire with the conductive portion of a high voltage distribution apparatus. SOLUTION: Into the cone through hole of an integrated object comprising a porcelain insulator 4 and a cone 24 made of a molded rubber, a compatible connector terminal bearing lead wire 20 is inserted. Then, a male screw portion 23b of a connective terminal 23 of the end of the inserted connector terminal bearing lead wire 20 is engaged with a female screw portion 3a of a conductive rod 3 of a distribution apparatus to complete the assembling of a bushing for high voltage distribution apparatuses. In this case, a packing 6 engaged with the male screw portion 23b of the connective terminal 23 is pressed against the protruding portion of the through hole of the porcelain insulator 4 to secure the buffering work and airtightness between the connective terminal 23 and the porcelain insulator 4. In this way, the removing work of a secondhand lead wire from a high voltage distribution apparatus detached once from a distribution line and the mounting work of a new lead wire on the place of the secondhand lead wire having been removed therefrom can be performed quickly and easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead wire connecting structure of a bushing for a high-voltage distribution equipment. More specifically, the present invention relates to a connection structure of a lead wire provided with a rubber mold cone such as a high-voltage power distribution device, for example, a pole switch.

[0002]

2. Description of the Related Art A high-voltage power distribution device, for example, a connection between an insulation bushing such as a pole switch and a lead wire has a special structure in consideration of electrical characteristics, weather resistance, and the like.

FIG. 4 is a longitudinal sectional view showing an example of a lead wire connection structure of a conventional bushing for a high-voltage distribution equipment.

In FIG. 4, reference numeral 1 denotes a lead wire connection structure of a conventional bushing for a high-voltage power distribution device, 2A denotes a lead wire with a molded cone, 20 denotes an insulated wire serving as a lead wire, 21 denotes an insulating coating of the insulated wire 20, 22 is a conductor of the insulated wire 20, 23 is a connection terminal, 23a is a conductor insertion hole of the connection terminal 23, 23b is a male screw part of the connection terminal 23, 23c is a compression part of the connection terminal 23, 24 is a rubber mold cone, and 24a is a cone. 3 is a conductive rod for power distribution equipment, 3a is a conductive rod for power distribution equipment
4 is a porcelain insulator, 4a is a through-hole of the porcelain insulator 4, 4b is a cone bonding surface of the porcelain insulator 4, and 5 is an adhesive.

That is, the conventional lead wire connecting structure 1 of a bushing for a high voltage power distribution device has a lead wire 2A of an insulated wire 20 provided with a rubber mold cone 24 and a mating side connected to the lead wire 2A, that is, a high voltage power distribution. The power distribution equipment conductive rod 3 of the equipment is connected within the through hole 4 a of the porcelain insulator 4.

[0006] These connection work procedures are performed as follows.

A. Lead wire 2A (1) First, an insulated wire 2 having a specified length, for example, a length of 2 m.
Prepare 0.

(2) Next, the insulating coating 21 at the end of the prepared insulated wire 20 is peeled off to expose the conductor 22.

(3) Next, a connection terminal 23 is formed in a rod shape, and has a conductor insertion hole 23a opened in the center of the shaft at one end and a male screw portion 23b integrally fixed to the other end. Prepare

(4) Next, the porcelain insulator 4 is prepared.

The porcelain insulator 4 has a through hole 4a opened at the center of the shaft at one end thereof, and a cone bonding surface 4b of the insulator is provided at the end of the inner peripheral surface of the through hole 4a. In addition, the conductive rod 3 of the high-voltage power distribution device having the female screw 3a cut in the center of the shaft at the other end can be fixed.

(5) Next, the male screw portion 23b of the connection terminal 23 is inserted into the female screw portion 3a of the porcelain insulator 4 prepared in (4).
Is screwed and fixed.

(6) Next, the terminal conductor 22 of the insulated wire 20 prepared in (3) is inserted into the conductor insertion hole 23a of the connection terminal 23 prepared in (3).

(7) Next, the compression section 2 of the connection terminal 23
3c is caulked with a caulking device such as a die.

(8) Next, the portion of the insulated wire 20 connected in this way from the terminal conductor 22 to the end of the connection terminal 23 is formed into a rubber mold cone 24 shown in FIG. 4 using ethylene propylene rubber or the like. Molding.

(9) Next, the rubber mold cone 24
The adhesive 5 is applied between the cone bonding surface 24a of the porcelain insulator 4 and the cone bonding surface 4b of the porcelain insulator 4.

(10) Next, the male screw portion 23 of the connection terminal 23
b is screwed into the female screw 3a of the mating conductive rod 3.

By this screwing, the insulator bonding surface 24 of the cone of the rubber mold cone 24 coated with the adhesive 5 in the above (9).
a and the cone bonding surface 4b of the insulator of the porcelain insulator 4 are tightly bonded and solidified, and the insulated wire 20 serving as a lead wire is assembled to the porcelain insulator 4.

(11) Next, a high-voltage power distribution device incorporating the lead wire with the porcelain insulator 4 assembled in this manner, for example, a left and right pole switch, is assembled.

(12) Next, the high-voltage distribution equipment incorporating the lead wire with the porcelain insulator 4 as described above, for example, a pole switch, is transported to the connection site.

(13) Next, the insulated wire 20 of the lead wire of the high-voltage power distribution equipment incorporating the lead wire with the porcelain insulator 4, for example, the pole switch of the pole switch, is cut to the field connection length, and The insulating coating 21 at the end is peeled off, and the terminal conductor 22 finally exposed is connected to the conductor of the distribution line main line.

[0022]

By the way, a high-voltage power distribution device incorporating a lead wire with a porcelain insulator 4, for example, a porcelain insulator 4
A pole switch incorporating a lead wire may be removed due to a change in the route of the distribution line, an increase in capacity, or a service life check.

Second-hand products, ie, high-voltage distribution equipment incorporating such detached leads with porcelain insulators 4, for example, pole switches incorporating the leads with porcelain insulators 4, are exposed during initial installation work. The insulated wire 20 of the wire is cut into a short length that has been adjusted at the site, and therefore cannot be reused as it is.

Therefore, such second-hand products, that is, high-voltage power distribution equipment incorporating the detached lead wire with the porcelain insulator 4, such as a pole switch incorporating the lead wire with the porcelain insulator 4, must be reused. It is necessary to add the insulated wire 20 so that the length of the outgoing wire becomes the specified length, or replace the used outgoing wire with the porcelain insulator 4 with a new outgoing wire with the porcelain insulator 4.

However, in the method of adding the insulated wire 20 to the short-length lead wire, an advanced connection technique is required because the connection is an intermediate connection operation of the insulated wire for high voltage, and the electrical connection of the obtained connection portion is required. There was a problem that characteristics and mechanical characteristics were reduced.

On the other hand, in a method of replacing a used lead wire with a porcelain insulator 4 with a new lead wire with a porcelain insulator 4, the insulated wire 2
The lead wire 0, the rubber mold cone 24, and the porcelain insulator 4 are bonded and solidified by the adhesive 5, so that it is often necessary to remove the used lead wire with the porcelain insulator 4 that has been solidified. It takes a lot of man-hours, and it takes a lot of work to connect a new lead wire with porcelain insulator 4 to the removal site, and the used lead wire with porcelain insulator 4 is discarded. There was a drawback that the cost also increased significantly.

The present invention has been made in view of such a point, and an object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to use a used lead wire from a high-voltage power distribution device once removed from a distribution line. For high-voltage distribution equipment, which allows quick and easy removal of new equipment and installation of new outlet lines on the site of removal, thereby allowing the once removed high-voltage distribution equipment to be recovered and reused as the original one An object of the present invention is to provide a lead wire connection structure for a bushing.

[0028]

The gist of the present invention is that a through hole is opened at the center of the shaft, and a through hole projection is provided at an intermediate portion of the through hole. A cone through hole is opened in the through hole of the insulator provided with a cone bonding surface at one end, and an insulator bonding surface of a cone that can be surface bonded to the cone bonding surface of the insulator is provided on an outer peripheral side thereof. The rubber molded cone provided is mounted, and a lead wire with a replaceable connection terminal is mounted so as to penetrate the through-hole protrusion from the cone through hole of the rubber mold cone, and further, the replaceable connection terminal A lead wire connecting structure for a bushing for a high voltage distribution device, wherein a leading connection terminal portion of the attached lead wire is electrically connected to a conductive portion of the high voltage distribution device.

In the present invention, it is preferable that the inner diameter of the cone through hole of the rubber mold cone is equal to or slightly smaller than the outer diameter of the insulated wire serving as the lead wire.

In the present invention, the insulator bonding surface of the rubber mold cone and the cone bonding surface of the insulator are preferably bonded and integrated with an adhesive.

In the present invention, the lead wire with the exchangeable connection terminal has a conductor insertion hole opened at the center of the shaft on one end side, and a middle part of the conductor insertion hole serves as a compression part, and the other end side has a compression part. The conductor exposed portion at the other end of the insulated wire is inserted into the conductor insertion hole of the connection terminal to which the male screw portion is integrally fixed, and the compressed portion into which the conductor exposed portion is inserted is added. Preferably, it is configured to be tightened.

In the present invention, it is preferable that a seal is coated on the outer periphery around the terminal end of the rubber mold cone fitted with the insulated wire.

In the present invention, the sealing material is preferably one selected from an adhesive insulating tape, a heat-shrinkable tube, a curable liquid resin, and a rubber adhesive.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a lead wire connecting structure of a bushing for a high-voltage distribution equipment according to the present invention will be described with reference to FIGS.

FIG. 1 is a longitudinal sectional view showing an embodiment of a lead wire connection structure of a bushing for a high-voltage distribution equipment according to the present invention.

FIG. 2 is a longitudinal sectional view showing a state in which a porcelain insulator and a rubber mold cone used in the embodiment of the lead wire connection structure of the bushing for a high-voltage distribution device of the present invention shown in FIG. 1 are bonded. .

FIG. 3 is a front view showing a lead wire with exchangeable connection terminals used in one embodiment of the lead wire connection structure of the bushing for high-voltage distribution equipment of the present invention shown in FIG.

1 to 3, reference numeral 20 denotes an insulated wire serving as a lead wire, 21 denotes an insulating coating of the insulated wire 20, 22 denotes a conductor of the insulated wire 20, 23 denotes a connection terminal, and 23a denotes a connection terminal 23.
23b is a male screw portion of the connection terminal 23, 23b
c is a compression part of the connection terminal 23, 24 is a rubber mold cone, 24a is an insulator bonding surface of the cone, 24b is a cone through hole, 3 is a conductive rod of the power distribution equipment, 3a is a female screw part of the conductive rod 3 of the power distribution equipment, and 4 is a porcelain. Insulators, 4a are through holes of the porcelain insulator 4;
b is a cone bonding surface of the insulator of the porcelain insulator 4, 4C is a projection of a through hole, 5 is an adhesive, 6 is a packing, and 7 is a seal.

Next, a description will be given of an assembling procedure of one embodiment of the lead wire connection structure of the bushing for a high-voltage distribution device according to the present invention.

(1) Integrated porcelain insulator and rubber mold cone
Preparation of a compound A method of preparing a porcelain insulator / rubber mold cone integrated product will be described with reference to FIG.

First, a through-hole 4a is opened at the center of the shaft, and a through-hole protrusion 4b is formed at an intermediate portion of the through-hole 4a.
A ceramic insulator 4 having a cone bonding surface 4b at one end of the through hole 4a is prepared.

Next, a preformed rubber mold cone having a cone through hole 24 b opened and having a cone insulator bonding surface 24 a which can be surface bonded to the cone bonding surface 4 b of the porcelain insulator 4 on the outer peripheral side. 24 are prepared.

Here, the inner diameter of the cone through-hole 24b is equal to or slightly smaller than the outer diameter of the insulated wire 20 serving as the lead wire.

Next, the porcelain insulator 4 prepared above
The adhesive 5 is applied to the cone bonding surface 4b of the ceramic insulator 4 of FIG.

Next, the adhesive 5 is applied to the insulator bonding surface 24a of the rubber mold cone 24 of the molded article prepared as described above.
Is applied.

Next, as shown in FIG. 2, the preformed rubber mold cone 24 prepared as described above is inserted into one inner peripheral surface of the through hole 4 a of the porcelain insulator 4 prepared as above, and tightly closed. By bonding and integrating, a porcelain insulator and rubber mold cone are integrated.

(2) Creation of Leader Wire with Exchangeable Connection Terminal A method for creating a lead wire with exchangeable connection terminal will be described with reference to FIG.

First, an insulated wire 20 having a specified length to be a lead wire, here a length of 2 m, is prepared.

Next, the insulated wire 20 prepared above
The insulating coating 21 on the other end side (right side in FIG. 3) is peeled off to expose the conductor 22.

Next, the whole is rod-shaped, and a conductor insertion hole 23a is opened at one end (left side in FIG. 3) of the shaft center, and an intermediate portion of the conductor insertion hole 23a is formed as a compression part 23c. At the other end (on the right side in FIG. 3), a connection terminal 23 to which a male screw portion 23b is integrally fixed is prepared.

Next, the insulating coating 21 prepared above
3 is inserted into the conductor insertion hole 23a of the connection terminal 23 prepared above. Then, a conductor insertion hole 23a into which the conductor 22 is inserted.
Is compressed with a die or the like.

Finally, the packing 6 is fitted from the male screw portion 23 b on the other end side (the right side in FIG. 3) of the connection terminal 23, and is pressed against the center of the connection terminal 23, so that the outlet with the exchangeable connection terminal is provided. A line.

In this case, it is desirable that the packing 6 is adhered to the center.

(3) Lead wire of bushing for high-voltage distribution equipment
Assembly of one embodiment of connection structure The lead wire with the exchangeable connection terminal obtained in the above (2) is inserted into the cone through hole 24b of the integrated ceramic insulator / rubber mold cone obtained in the above (1).

Next, the male screw portion 23 b of the connection terminal 23 at the tip (right side in FIG. 3) of the inserted lead wire with the exchangeable connection terminal is screwed into the female screw portion 3 a of the power distribution device conductive rod 3. The assembly of the embodiment of the lead wire connection structure of the bushing for the high voltage distribution equipment of the present invention is completed.

At this time, the packing 6 fitted in the male screw portion 23b of the connection terminal 23 is pressed against the through-hole projection 4b of the porcelain insulator 4, so that the buffering action and confidentiality between the connection terminal 23 and the porcelain insulator 4 are ensured. You.

As shown in FIG. 1, a seal may be provided between the end portion (left side in FIG. 1) of the rubber mold cone 24 and the insulated wire 20.

Here, as the sealing material, an adhesive insulating tape, a heat-shrinkable tube, a curable liquid resin, a rubber adhesive, or the like can be used.

The lead wire connection structure of the bushing for the high voltage distribution equipment according to the embodiment of the present invention thus obtained is used to remove the used lead wire from the high voltage distribution equipment once removed from the distribution line and to the removal site. The installation work of a new lead wire can be performed quickly, easily, and at low cost.

[0060]

According to the present invention, the lead wire connection structure of a bushing for a high-voltage power distribution device can be quickly, easily, and inexpensively recovered to its original state even if it is once removed from a distribution line, so that it can be completely reused. It is possible and industrially useful.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a lead wire connection structure of a bushing for a high-voltage distribution device according to the present invention.

FIG. 2 is a longitudinal sectional view showing a bonded state of a porcelain insulator and a rubber mold cone used in the embodiment of the lead wire connection structure of the bushing for a high-voltage distribution device of the present invention shown in FIG.

FIG. 3 is a front view showing a lead wire with exchangeable connection terminals used in the embodiment of the lead wire connection structure of the bushing for a high-voltage distribution device of the present invention shown in FIG. 1;

FIG. 4 is a longitudinal sectional view showing an example of a lead wire connection structure of a conventional bushing for a high-voltage distribution device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conventional lead wire connection structure of bushing for high voltage distribution equipment 2A Lead wire with molded cone 20 Insulated wire 21 Insulating wire 22 Conductor 23 Connection terminal 23a Conductor insertion hole 23b Male screw part 23c Compression part 24 Rubber mold cone 24a Cone insulator Adhesive surface 24b Cone through hole 3 Power distribution equipment conductive rod 3a Female screw part 4 Porcelain insulator 4a Through hole 4b Cone adhesive surface 4C Through hole protrusion 5 Adhesive 6 Packing 7 Sealed material

Claims (6)

[Claims] A through hole is opened at the center of the shaft, a through hole projection is provided at an intermediate portion of the through hole, and a cone bonding surface is provided at one end of the through hole. In the through hole of the insulator, a rubber mold cone in which a cone through hole is opened, and an outer peripheral side of which is provided with an insulator bonding surface of a cone capable of surface bonding with the cone bonding surface of the insulator is mounted, In addition, a lead wire with an exchangeable connection terminal is mounted so as to penetrate through the cone through hole of the rubber molded cone into the through hole projection, and the tip connection terminal of the lead wire with the exchangeable connection terminal is a high voltage distribution device. A lead wire connection structure for a bushing for a high-voltage power distribution device, wherein the lead wire connection structure is electrically connected to the conductive portion. 2. The rubber mold cone according to claim 1, wherein the inner diameter of the cone through hole is equal to or slightly smaller than the outer diameter of the insulated wire serving as the lead wire. The lead wire connection structure of the bushing for high-voltage distribution equipment described in the above. 3. The lead wire connection of a bushing for a high-voltage distribution equipment according to claim 1, wherein the insulator bonding surface of the rubber mold cone and the cone bonding surface of the insulator are bonded and integrated by an adhesive. Construction. 4. A lead wire with an exchangeable connection terminal, wherein a conductor insertion hole is opened at a shaft center portion at one end, and a middle portion of the conductor insertion hole serves as a compression portion, and at the other end side. The conductor exposed portion at the other end of the insulated wire is inserted into the conductor insertion hole of the connection terminal to which the male screw portion is integrally fixed, and the compressed portion into which the conductor exposed portion is inserted is swaged. The lead wire connecting structure for a bushing for a high-voltage power distribution device according to claim 1, wherein the lead wire connecting structure is configured as described above. 5. A lead wire of a bushing for a high-voltage distribution equipment according to claim 1, wherein a seal is coated on an outer periphery around a terminal end of the rubber mold cone fitted with the insulated wire. Connection structure. 6. The high-voltage power distribution equipment according to claim 4, wherein the sealing material is one selected from an adhesive insulating tape, a heat-shrinkable tube, a curable liquid resin, and a rubber adhesive. Bushing lead wire connection structure.