JPH059116U - Connection line desorption device for transformer - Google Patents

Abstract

(57) [Abstract] [Purpose] Operation of an insulated operating rod using a bushing holder to perform high-voltage cutouts on the power supply side of general-purpose distribution line transformers, replacement, inspection, and repair work of connection lines, etc. The terminals of the bushing, the connecting line and the bypass line can be attached / detached so that the work can be performed safely, quickly, surely and easily for the customer to put the work area into the power outage under the uninterrupted condition. A bushing holder 1 having an insertion hole 2 into which a bushing A of a transformer is formed and a connection wire holder 3 having a recessed hole 4 into which a connection wire B is inserted are integrally formed of an insulating material. The bushing holder 1 is provided with a fixing means 5 for the bushing A, and the connection wire holder 4 is provided with a fixing means 6 for the connection wire B and a pressing means 7 for holding the connection wire B in contact with the terminal D. Is temporarily held by the fixing means and the pressing means, the shield plug is removed, the bypass tool is connected, and after charging by the bypass circuit, the fixing means and the pressing means are released to disconnect the connection line B, and the connection line on the power source side of the work area is connected. Separate and put the work area in a power failure state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This device is designed so that the high-voltage cutout on the power supply side of the transformer installed on the distribution line, the replacement of connecting lines, etc. The present invention relates to a transformer connecting wire attaching / detaching device in which a transformer bushing is directly held and a connecting wire can be attached / detached and a bypass wire can be attached / detached by an operation with an insulating operation rod.

[0002]

[Prior Art]

 On the power supply side of the transformer set on the distribution line, immediately when performing high-voltage cutout, replacement, inspection, repair, etc. of the connecting line, open the nearest switch outside the work area and temporarily shut down the power. For example, remove the connection wire of the transformer terminal and replace it with the connection wire of the separately provided bypass cable to supply power to the customer and then perform the work in a power outage, or strip the coating of the connection wire to the transformer terminal. Bypass cables will be connected, and the work will be carried out in a charged state as an uninterrupted power supply to customers.

[0003]

[Problems to be solved by the device]

 The connection line from the high-voltage cutout is connected to the high-voltage side terminal of a general-purpose transformer by tightening it with a porcelain shield plug. It is impossible to remove this shielding plug and replace it with a bypass line because it causes an electrical accident due to the high voltage, and the method described above has been used in the past. However, the latter is not only labor-intensive, but also poses a problem because it involves a risk of work.

The present invention responds to the diversification and sophistication of electric power usage in recent years, and in consideration of the fact that it is demanded that a customer side is in an uninterrupted state and that a work area is in an uninterrupted state, a bushing is considered. By using the holder to operate the insulating operating rod, the terminals of the bushing of the distribution transformer and the connecting wire can be temporarily held by the fixing means and the pressing means to enable the removal of the shield plug, and the bypass wire to the bushing terminal. For transformers that can perform the work to put the work area in the power outage state safely, quickly, surely, and easily by disconnecting the fixing means and pressing means and disconnecting the connection line under the uninterrupted state on the customer side It is an object of the present invention to provide a connecting wire attaching / detaching device.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a bushing holder 1 having an insertion hole 2 for inserting and holding a bushing A of a transformer and a concave hole for inserting and holding a connecting line B connected to the bushing A in a cross shape. 4 is integrally formed with the connecting wire holder 3 formed in a cross shape in the insertion hole 2 of the bushing holder 1 with an insulating material, and a fixing means 5 for fixing the bushing A to the bushing holder 1 is provided, Further, the connecting wire holder 3 is provided with a fixing means 6 for fixing the connecting wire B and a pressing means 7 for holding the connecting wire B in contact with the terminal D of the bushing A.

[0006]

[Action]

 According to this invention, the bushing A for transformer is inserted with the insertion hole 2 of the bushing holder 1, and the connection line B connected to the terminal D of the bushing A is inserted into the recessed hole 4. And the bushing A are fixed by the fixing means 5, the connecting line B is fixed between the concave hole 4 and the fixing means 6, and the connecting wire B is pressed by the pressing means 7 to connect the connecting wire to the terminal of the bushing A. Hold in contact.

After that, the shield plug E such as porcelain provided at the terminal D of the bushing A is removed, and the terminal D is connected to the nearest connection portion outside the work area or the bypass tool C of the bypass line from the mobile power supply vehicle. After supplying the electric power to the transformer, the fixing means 5 and 6 and the pressing means 7 are released to disconnect the connecting line B from the terminal D of the bushing A, and the work area is stopped to a high voltage cutout, Replace, inspect, and repair connecting wires.

After the work is completed, the connecting wire B is connected to the terminal D of the bushing A, fixed by the fixing means 6 and the pressing means 7 as described above, and then the bypass tool C connected to the terminal D of the bushing A is removed. Then, the shielding plug E is attached, and then the fixing means 6 and the pressing means 7 are released, and further the fixing means 5 is also released, and the transformer connecting wire attaching / detaching device is removed from the bushing A.

[0009]

【Example】

 Examples will be described with reference to the drawings. In FIGS. 1 to 6, A is a bushing (terminal insulator) of a transformer, and a general-purpose transformer has a recess 18 formed at its tip and a connecting wire B is detachably attached to a terminal D of an internal conductor in a crossed manner. The through hole 20 and the male screw portion 21 for screwing the shield plug E or the bypass tool C of the bypass wire are provided, and the terminal D thereof is provided with a washer 22 and a spring seat 23, and the connection line B with the high-voltage cutout or the like is recessed. The washer 22 and the spring seat 23 are inserted into the through hole 20 through the place 18, and the shield plug E is clamped by pressure.

Reference numeral 1 is a trapezoidal bushing holder having a circular insertion hole 2 into which the bushing A is inserted, and 3 is a recessed hole 4 into which the connecting wire B connected to the terminal of the bushing A is inserted and held. A connecting wire holder that is a rectangular parallelepiped formed continuously with a recessed hole 24 formed at the tip of the bushing holder 1 in a direction orthogonal to the insertion hole 2 of the body 1. The connecting wire holder 3 is provided on the bushing holder 1. Is integrally formed with an insulating material such as synthetic resin.

Reference numeral 5 denotes a fixing means for fixing the bushing A to the bushing holder 1, and in the embodiment, the trapezoidal bushing holder 1 is provided with insertion holes 8 vertically and horizontally along the edges, and the insertion holes 8 are formed. A partial opening 8a is provided in the insertion hole 2 by drilling through the arc surface of the insertion hole 2, and the fixing pin 9 with the handle 25 is inserted through any of the insertion holes 8 to expose the fixing pin 9 to the opening 8a. The bushing A is fixed by being engaged with the corrugated concave portion 19 on the outer periphery of the bushing A in a wedge shape. It is preferable that the fixing pin 9 has a tapered shape so that the fixing pin 9 can exhibit a wedge effect by being inserted between the bushing A and the insertion hole 8. Further, the handle 25 of the fixing pin 9 is provided with an operation hole 26 for operation.

Reference numeral 6 is a fixing means for fixing the connecting wire B in the recess 4 of the connecting wire holder 3, and in the embodiment, a direction perpendicular to the recess 4 is formed in the front two-forked portion of the rectangular connecting wire holder 3. An elongated hole-like insertion hole 10 is provided in the hole, a flat fixing pin 11 with a handle 27 is inserted into the insertion hole 10, and the connecting wire B is fixed by pressure to the concave hole 4 on the side surface of the fixing pin 11. It is preferable that the fixing pin 11 has a tapered end so that the fixing pin 11 can be easily inserted. Further, the handle 27 of the fixing pin 11 is provided with an operation hole 28 for operation.

Reference numeral 7 is a pressing means for holding the base portion of the connection wire B in contact with the terminal D. In the embodiment, the rear inclination of the rectangular connection wire holder 3 is such that it presses in the direction opposite to the fixing means 6. A through hole 12 is provided obliquely toward the tip of the connecting line B from the surface, and a pressing pin 13 and an operating pin 15 for operating the pressing pin are provided in the through hole 12 so as to be capable of related operations via a spring 14. In addition, the cam plate 17 of the rotary shaft 16 at the rear of the connecting wire holder 3 is associated with the operating pin 15.

The pressing pin 13 has a V-shaped tip so that the connecting wire can be easily pressed, and an insertion hole 29 is provided on the proximal end side of the pressing pin 13 to insert the actuating pin 15 and work together with the pressing pin 13. A spring 14 is interposed between the moving pins 15, a spring 30 is interposed between the connecting wire holder 13 and the operating pin 15, and a long hole 31 is bored in the pressing pin 13 so that the operating pin 15 has a tip end. The provided spring pin 32 is engaged with the elongated hole 31 so that the pressing pin 13 and the operating pin 15 can move together, and the pressing pin 13 is provided with respect to the operating pin 15 along the elongated hole 31 so as to advance and retreat for a constant stroke. .. The cam plate 17 of the rotary shaft 16 is located in the recessed hole 33 in the rear portion of the connection wire holder 3, and the operation knobs 34 are provided at both ends of the rotary shaft 16, and the cam plate 17 is rotated by turning the operation knobs 34. Eggplant

Reference numeral 35 is a holding hole for holding the connecting wire attaching / detaching device.

C is a bypass tool for connecting a bypass wire, which is provided at its tip with a female screw portion 36 that is screwed into the male screw portion 21 of the terminal D of the bushing A, and is configured to connect the terminal to the bypass wire when screwing. E is a shield plug of porcelain or the like, and a female screw portion 37 which is similarly screwed into the male screw portion 21 is provided at the tip of the stopper. The screw is always screwed as shown in FIG. 1 to shield the terminal and the connecting wire is sandwiched between the terminals. Hold the pressure.

The bypass tool C of the embodiment comprises a protective cylinder 38, a bypass connecting stud 39 for connecting a bypass wire, an operating gear 40 for turning the protective cylinder 38, a grip 41, etc., and the operating gear 40 is operated by a rod. The protective cylinder 38 is turned (not shown) so that the female screw portion 36 at the tip of the protective cylinder 38 is screwed into the male screw portion 21 of the terminal D of the bushing A so that the bypass connection stud 39 is connected to the terminal D. There is.

According to the structure of the present invention, the work such as high-voltage cutout on the power supply side of the transformer, replacement of the connecting wire, and inspection is performed by an insulating operating rod (not shown) equipped with each operating tool. Then, the holding hole 35 is grabbed and the device is lifted up. As shown in FIG. 4, the bushing A protruding from the transformer is fitted in the insertion hole 2 of the bushing holder 1, and the terminal of the bushing A and the high-voltage cutout. Inserting the connecting wire B with the connecting wire B into the concave hole 4 of the connecting wire holder 3, and inserting the fixing pin 9 of the fixing means 5 into the inserting hole 8 with the operating rod as shown in FIG. The bushing A 1 is fixed to the bushing holder 1 by inserting it into the recess 19 in a wedge shape, and the fixing pin 11 of the fixing means 6 is inserted into the insertion hole 10 so that the connecting line B is recessed on the side surface of the fixing pin 11. It is fixed by sandwiching it with 4.

Thereafter, the operation knob 34 on the rear portion of the connection wire holder 3 is rotated to rotate the cam plate 17 to push down the operating pin 15 against the spring 14 to push the pressing pin 13 out of the through hole 12. Then, the tip of the connecting wire B is pressed to surely bring the terminal of the connecting wire and the terminal D of the bushing A into contact with each other.

In this way, the bushing and the connecting wire of the transformer are temporarily held by this device to secure the connection between the connecting wire and the terminal of the bushing, and then the terminal D of the bushing A is screwed as shown in FIG. Remove the combined shield plug E and connect the bypass device C, which is connected to the bypass line taken from the high-voltage main line, to the terminal D by screwing it, and supply the power to the transformer through the bypass line. After that, the fixing pin 11 of the fixing means 6 is pulled out, and the operating knob 34 is turned in the opposite direction to retract the pushing pin 13 of the pushing means 7 and the connecting wire B is pulled out from the terminal D of the bushing A, Remove the connection line on the power supply side of the work area and put the work area into a power failure state to perform the prescribed work.

After the work is completed, the connecting wire B is inserted into the terminal D of the bushing A and fixed by the fixing pin 11 in the same manner as described above, and the operation knob 32 is rotated to press and hold the pressing pin 13. After that, the bypass tool C is removed, the shielding plug E is fastened to the terminal D, and then the fixing means and the pressing means are released to remove the device from the transformer bushing.

[0022]

[Effect of the device]

 According to this invention, this device can be easily temporarily held on the bushing of the transformer by the insulating operation rod, and the connecting wire can be held in contact with the terminal before removing the shield plug and connecting the bypass wire directly to it. Secure a power supply circuit to the house, and under uninterrupted power, disconnect the work area power supply side connection line and put the working area into a power outage to quickly and safely replace, inspect, repair, etc. You can

The series of operations according to the present invention can be performed safely, quickly, surely, and easily by operating the insulated operating rod without approaching the high-voltage part. In addition, the uninterruptible construction method is used for a large number of widely used distribution transformers. Is possible and the effect is great.

[Brief description of drawings]

FIG. 1 is a perspective view showing a connecting / disconnecting device for a transformer according to the present invention.

FIG. 2 is a perspective view from the front side.

FIG. 3 is a perspective view showing a bushing to which a connecting wire is connected.

FIG. 4 is a cross-sectional view of a state in which a bushing in which a connecting wire is connected is inserted into the present device.

FIG. 5 is a cross-sectional view showing a state in which a bushing connecting wire is fixed to the apparatus by fixing means and pressing means.

FIG. 6 is a cross-sectional view showing a state in which the connecting wire is removed and a bypass tool is connected.

[Explanation of symbols]

 A Bushing B Connection wire C Bypass tool D Terminal E Shield plug 1 Bushing holder 2 Insertion hole 3 Connection wire holder 4 Recessed hole 5 Fixing means 6 Fixing means 7 Pressing means 8 Insertion hole 9 Fixing pin 10 Inserting hole 11 Fixing pin 12 Through hole 13 Push pin 14 Spring 15 Actuating pin 16 Rotating shaft 17 Cam plate

Continued Front Page (72) Inventor Hitoshi Yasuda 1-chome, Hakusan 1-chome, Moriyama-ku, Nagoya City No. 105 Hitsuji Landale 105

Claims (1)

[Claims for utility model registration] 1. A bushing holder (1) having an insertion hole (2) for inserting and holding a bushing (A) of a transformer,
A concave hole (4) for inserting and holding the connecting wire (B) is integrally molded with an insulating material with a connecting wire holding body (3) formed by crossing the insertion hole (2) of the bushing holding body (1), A fixing means (5) for fixing the bushing (A) is provided on the bushing holder (1), and a fixing means (6) and a connecting wire (6) for fixing the connecting wire (B) to the connecting wire holder (3). A connecting wire attaching / detaching device for a transformer, characterized in that a pressing means (7) for holding the (B) in contact with the terminal (D) of the bushing (A) is provided.