JPS63308819A - Insulator set for line - Google Patents

Abstract

PURPOSE:To make it possible to surely detect power feeding condition for a bypass line by conducting detecting terminals through electrode boards which are so arranged as to oppose a pair of branched conductors connected to a pair of fixed electrodes. CONSTITUTION:An insulator set 6 for line is provided with an insulator main body 8 having a through hole 8a. A fixed electrode 18A on the power source side and a fixed electrode 18B on the loading side are so provided as to oppose one opening end of this main body 8. Further, branched conductors 30A, 30B which are connected to electrodes 18A, 18B respectively are provided at the other opening end of the main body 8. Electrode boards 50A, 50B are so arranged as to oppose these conductors 30A, 30B and power detecting terminals 52A, 52B are conducted from these electrode boards 50A, 50B. And if a detector is connected to each terminal 52A, 52B after removing a power detection cap 53 in the line work or thereabout, the voltage between each conductor 30A, 30B and each electrode board 50A, 50B can be detected and hereby the power feeding condition to a bypass line and the grounding condition by a grounding conductor can be checked.

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) The present invention relates to a line insulator device for insulating and supporting electric wires in electric lines, as well as for opening and closing the line and switching connection to bypass lines. It is something.

(Conventional technology) In recent years, with the increase and diversification of electricity demand, track construction is frequently carried out, and at that time, it is required to maintain an uninterrupted state for customers in the construction section. . However, when carrying out track construction using conventional uninterruptible construction methods, the construction procedures are complicated, making it extremely time-consuming and problematic in terms of safety.

That is, in the conventional uninterruptible construction method, for example, as shown in FIG.
, 81b is the lead wire 82a of the bypass switch 82.83.
, 83a, respectively, and a bypass '4fA 84 and a construction transformer 86 for low-voltage consumers are connected between both bypass opening/closing Fi 82 and 83 to form a bypass line 85, and the main line is connected within the construction section W. A bypass line 85 is connected to the load group 87 that was connected to the electric wire 81c.
Connect. Then, after closing both bypass switches 82 and 83 and energizing the bypass line 85, the main line is cut off on both sides of the construction zone W by cutting the line edges a88, and the grounding wire is connected to the edge lines 88. By connecting, the electric wire 81c in the construction area W is grounded. Bypass line 8 in this state
Work within the construction section W is carried out while power is being supplied to the load group 87 via the load group 87. Moreover, after the construction is completed, the above-mentioned grounding wire is removed, the previously disconnected edge line 88 is connected, the bypass line 85 is shut off by opening both bypass switches 82 and 83, and both leads vA 82a and 83a are removed. This is how it was done.

(Problem to be solved by the invention) However, in the conventional construction method described above, the bypass switch 8
11' for connecting 2.83 to electric wires 81a and 81b
f! When stripping off the insulation coating of A81a and 8lb, it is necessary to perform various operations such as cutting and reconnecting the edge wire 88, and further insulating the area where the coating is stripped and the area where it is reconnected. Workers have many opportunities to touch live wires, which not only requires a lot of time and effort to prepare to ensure safety, but also causes damage to the main wires 81a to 81c or shortens the life of the wires due to water intrusion. There was a problem.

This application was filed in view of the above circumstances,
The purpose of this is to install it in advance on the power line as a wire support insulator, so that the line can be opened and closed at any point and switched to the bypass line at any time during construction without directly touching the main wire. To provide a line insulator device which can detect the power supply state to a bypass line before and after switching, and can perform uninterrupted work simply and safely.

Structure of the Invention (Means and Effects for Solving Problems) In order to achieve the above object, the present invention includes an insulator body having a through hole opening at both ends, and one open end of the insulator body. a pair of fixed electric bridges arranged opposite to each other and to which electric wires on the power supply side and load side of the line are respectively connected; an insulating tube held between the two fixed electrodes and opened between the two fixed electrodes; A movable electrode that can open and close between both fixed electrodes by reciprocating inside the insulating cylinder,
At least a pair of branch electrodes each connected to the fixed electrodes and led out to the other open end through the through hole of the insulator body, and an electrode plate disposed opposite to the branch conductor, respectively. A lead-out voltage detection terminal is provided.

Therefore, by installing the line insulator device in a closed state in each predetermined section of the electric line in advance, it can be used as an electric wire support insulator. When carrying out uninterrupted work within a given section, a bypass line consisting of a lead wire, a bypass switch, etc. is connected to one branch electrode of a pair of track insulators located on both sides of the construction section, and the other By connecting a ground wire to each of the branch electrodes, a bypass line can be easily laid without stripping the insulation coating of the wires during construction. In this state, if the bypass line is closed by the bypass switch, power will be supplied to the bypass line from the line outside the construction area, and after checking the power supply status with a voltage detector connected to the voltage detection terminal, both sides will be fixed with a movable electrode. If the circuit between the electrodes is opened, power supply to the main line in the construction section will be stopped.

Furthermore, after the construction is completed, power can be supplied to the main line in the construction section by removing the grounding wire and closing the circuit between both fixed electrodes using a movable electrode, and then opening the bypass line using a bypass switch to supply power to the bypass line. If the bypass line is removed from the track insulator device after the power supply is stopped and the status of the power supply stopped is confirmed using a voltage detector connected to the voltage detection terminal, the entire line will be restored.

(First Embodiment) Hereinafter, the first embodiment embodying this invention will be described in Figs. 1 to 7.
This will be explained in detail based on the figures.

As shown in FIG. 6, support arms 1 are fixed on two utility poles PL and P2 that are spaced apart from each other by a predetermined distance on the power distribution line, and each support arm 1 has a connecting fitting 2, a tension insulator 3,
Zero wires 5 as electric wires are connected through connecting fittings 4, and track insulator devices 6 are respectively fixed upright through base fittings 7 shown in FIG.

As shown in FIG. 1, the track insulator device 6 is fixed on the support arm 1 via the base metal fitting 7, and
An insulator body 8 made of porcelain having a through hole 8a extending along the axis, and jumper wires 9A and 9B disposed on the top of the insulator body 8 and connected to both the connecting fittings 4 are connected to both sides for opening and closing. 10.

First, to explain the support structure of the opening/closing part 10, a flange member 11 is fixed to the outer periphery of the upper end of the insulator body 8 with cement 12, and on the upper side of the flange member 11 is a ring-shaped ring made of reinforced plastic material. Insulating board 1
3 are arranged.

As shown in FIGS. 4 and 5, a pair of metal mounting plates 14A and 14B are provided above the insulating plate 13, and a through hole 8a is provided below the remounting plates 14A and 14B. A connecting portion 14a protruding toward each other is provided. One mounting plate 14A is connected and fixed to the insulating plate 13 via a pair of screws 15. Also, the mounting plate 14A
A pair of female screw pieces 16 are embedded and fixed in the insulating plate 13 on the side, and the insulating plate 13 is fixed to the flange member 11 by screwing the female screw pieces 16 and bolts 17 together. Therefore, the mounting plate 14A includes the screws 15 and the insulating plate 13.
, are fixed to the flange member 11 via bolts 17. On the other hand, a pair of female screw pieces 16 are embedded and fixed in the mounting plate 14B, and bolts 17 are screwed into the female screw pieces 16 by passing through the flange member 11, the insulating plate 13, etc., and the installation is performed based on the screwing. A plate 14B is fixed to the flange member 11. Therefore, the remounting plates 14A and 14B are electrically insulated.

A support portion 14b that stands up upward is integrally formed on the rear side of the reinstallation plates 14A and 14B, and a fixed electrode 1 on the power supply side to which a jumper vA9A is connected is attached to the outer end of the support portion 14b.
8A and a fixed electrode 18B on the load side to which jumper vA9B is connected are each tightened and fixed by screws 19. Furthermore, fixing pieces 14c are provided protruding from the inner ends of both the supporting parts 14b, and as shown in FIG. A non-linear resistor 22 is clamped and fixed.

As shown in FIGS. 1 and 3, both fixed electrodes 18A, 18
An insulating cylinder 23 is disposed between B, and openings on both sides thereof are fitted into both fixed electrodes 18A and 18B, respectively. or,
Inside the insulating cylinder 23, both fixed electrodes 18A, 1
Electrode terminals 24/', 24B formed in a cylindrical shape by a plurality of contact pieces 24a are attached to the ends of 8B. That is, the electrode terminals 24A and 24B are arranged facing each other with a predetermined insulating distance, and are fixedly tightened by spring members 25 fitted to the outer peripheries of the base and distal ends so as to be expandable. Further, inside the insulating tube 23, an arc-extinguishing tube 26 made of an arc-extinguishing material such as melamine resin is disposed between the electrode terminals 24A and 24B, and the arc-extinguishing tube 26 and the electrodes The inner cavities of the terminals 24A and 24B constitute a passage 28 that communicates with each other on one horizontal axis.

Then, the remounting plates 14A, 14B, both fixed electrodes 18
A, 18B, non-linear resistor 22, insulating cylinder 23, jumper wires 9A, part of 9B, etc. are molded with a covering member 27 made of EP rubber (ethylene propylene rubber),
A part of the covering member 27 is attached to the insulating cylinder 23 and the mounting VjL14.
A and 14B, and between the insulating plate 13 and the mounting plate 14A,
14B, and is fitted into the through hole 8a, and covers and protects the outer circumferences of the insulating plate 13 and the flange member 11. Also, the covering member 27 on the jumper wire 9B side
A guide groove 27a that is parallel to the jumper wire 9B and communicates with the passage 28 is formed in the outer wall, and locks i1127b and 27c are formed at both ends of the guide groove 27a. Further, a movable electrode 29 having an arc-extinguishing rod 29b made of an arc-extinguishing material fixed to one end thereof is arranged in the passage 28 so as to be movable back and forth. The other end of the movable electrode 29 passes through one of the fixed electrodes 18B and is led out to the guide groove 27a of the covering member 27, and a bent insulating ring 29a for operation is provided at the end.

When the insulating ring 29a of the movable electrode 29 is engaged with one of the locking grooves 27b as shown by the solid line in FIG. The main wire 5 is placed in a closed circuit position where the wire 18A and 18B are closed through the movable electrode 29 and the jumper wires 9A and 9B. Further, after the movable electrode 29 in the closed circuit position is rotated approximately 90 degrees to the rotation position shown by the chain line in FIG. 3, it is moved to the right along the guide groove 27a, and then the movable electrode 29 is returned Due to the U-shaped rotation, when the insulating ring 29a is engaged with the other locking groove 27c as shown by the two-dot chain line in FIG. The zero wire 5 is placed between both jumper wires 9A and 9B.
is opened.

In the above description, the movable electrode 29 is provided with a bent insulating ring 29a and rotated, but the insulating ring 29a may be a straight body and opened and closed only by horizontal movement. In this case, the locking groove 27b,
27c may not be provided. Furthermore, the movable electrode 29 has a gas passage that can be opened between the insulating cylinder 23 and the guide groove 27a, for example, a groove 29 extending in the axial direction on the outside and side of the movable electrode 29.
By providing ventilation with the outside by providing a vent, etc., it is possible to promote agitation of gas by the arc when the circuit is opened, and improve the arc extinguishing ability.

Next, the internal structure of the insulator body 8 will be explained. The connecting portion 14a of the mounting plates 14A, 14B has a branch conductor 3.
0A and 30B are respectively fitted and connected at their upper ends, and the branch conductor 30A.

The lower end of 30B passes through the through hole 8a and is led out from the lower open end of the insulator body 8. Said re-branching conductor 3
At the lower ends of 0A and 30B are lead wires 36a and 37a and ground wires 36b and 37 of the bypass line 40 shown in Fig. 6.7.
Cylindrical branch electrodes 31A and 31B are attached to which the electrodes b can be inserted and connected. Further, an insulating coating member 32 made of EP rubber is provided on the outer periphery of the branch conductors 30A, 30B and the branch electrodes 31A, 31B, and the upper end thereof is provided with a through hole 8a.
It is bifurcated at the upper part of the inner side, and the lower end is bifurcated below the insulator body 8.

Furthermore, a stress cone 33 for mitigating the electric field is formed of semiconductive rubber or the like and is disposed on the lower outer periphery of the insulating coating member 32, and the joint portion between the stress cone 33 and the lower end of the insulator body 8 is the base. It is held in pressure contact with the base metal fitting 7 by a metal lid 34 attached to the lower side of the metal fitting 7. Furthermore, a branch electrode 3 is provided at the lower end of the insulating coating 32.
1A.

A rubber cap 35 for protecting the open end of 31B is removably fitted. This rubber cap 35 is composed of an insulating layer 35a and a semiconductive layer 35b, and is grounded via the stress cone 33 in the attached state.

On the other hand, as shown in FIGS. 1 and 2, the metal lid 3
4, each branch conductor 3 is attached to the insulating covering member 32.
A pair of circular electrode plates 50A facing 0A and 30B,
50B is buried.

An opening 51 is formed in the stress cone 33 facing each electrode plate 50A, 50B, and a part of the insulation coating member 32 is fitted into the opening 51. Further, voltage detecting terminals 52A, 5 are provided at the center of each of the electrode plates 50A, 50B.
2B protrudes and penetrates the insulation coating member 32 in the opening 51 and is exposed to the outside thereof.

On the outer surface of the stress cone 33, a voltage detection cap 53 is removably attached to each voltage detection terminal 52A, 52B. This cap 53 has an outer covering part 54a formed of a semiconductive material so as to form a brimmed hat shape;
In a state in which the device insulating material 54b constituted by the insulating material 54b filled in the outer covering portion 54a is in close contact with the outer surface of the stress cone 33, each of the voltage detecting terminals 52A, 52
It is adapted to be removably fitted to the outer end of B.

Next, the operation of the track insulator device 6 configured as described above will be explained.

Now, this line insulator device 6 is installed in advance in each predetermined section of the distribution line, and the movable electrode 29 is always placed in the closed position shown by the solid line in FIG. 1, and the jumper wires 9A, 9B
Zero 15 is closed via.

For example, as shown in Fig. 6.7, the utility poles PL, P
Uninterrupted line construction in any section, such as a two-way line, will be carried out using the following procedure.

That is, first, the caps 35 of the pair of track insulators 6 installed on both sides of the construction zone are removed, and the sixth
．． The lead wires 36a and 37a of the bypass switch 36.37 are connected to the left branch electrode 31A of the track insulator bag R6 shown on the left in FIG. 7 and the right branch electrode 31B of the track insulator device 6 shown on the right. The terminals are fitted and connected, and the connecting terminals of the ground wires 36b and 37b are fitted and connected to the branch electrodes 31A and 31B arranged in parallel with the branch electrodes 31A and 31B, respectively. Also, the bypass switch 36
．． A bypass wire 38 is connected between 37 and the lead wire 3
6a, 37a, and switches 36 and 37 constitute a bypass line 40, and a construction transformer 39 for a low-voltage line is connected via the bypass line 38.

Next, in the construction section, the main 1 is connected in advance through the protective fuse 5a such as a cutout, the transformer 5b and the low voltage line R.
A load group (the illustrated path) connected to 5 is connected to the bypass line 40 via the low voltage line R.

Then, after the bypass line 40 is closed by both bypass switches 36 and 37 to ensure an uninterrupted state inside and outside the construction zone, the movable electrode 29 is operated based on the operation of the insulating ring 29a in each track insulator device 6 on both sides of the construction zone. are respectively switched to the open position. In this state, the power supply to the zero wire 5 in the construction zone is stopped, and power is supplied from the zero wire 5 outside the construction zone to the bypass line 40, and the high voltage or low voltage load group is supplied via the bypass line 40. While power is being supplied, various construction works such as load addition can be carried out in the construction section without power outage.

Afterwards, when the track construction was completed, the insulator bags for the track on both sides of the construction section! At step 6, the ground wires 36b and 37b are removed from the branch electrodes 31A and 31B, respectively, and the movable electrode 29 is returned to the closing position based on the operation of the insulating ring 29a to close the zero wire 5. Power supply will be resumed. Further, if the bypass line 40 is opened by the bypass switches 36 and 37 and the lead wires 36a and 37a are removed in sequence, the zero line 5 can be completely restored.

In this embodiment, the voltage detection cap 53 is removed before and after track construction, and each voltage detection terminal 52A, 52B is
and expose each voltage detection terminal 52A.

When a voltage detector (path shown in the diagram) is connected to 52B, the voltage detector connects each branch conductor 30A, 30B and each electrode 1i50A,
50B can be detected, and therefore the power supply state to the bypass line 40 and the grounding state by the grounding wires 36b and 37b can be confirmed, and construction work can be carried out safely.

As described above, if uninterruptible construction of the line is performed using this line insulator device 6, the bypass line 40 can be easily and quickly laid without stripping the insulation coating of the zero wire 5, and the movable electrode 29 jumper wire 9A based on the operation of
, 9B can be reliably opened and closed in the construction zone without cutting the zero wire 5. Furthermore, after the completion of construction, the insulation coating of the main line 5 and the jumper wire 9A will be removed.
.

The entire main line 5 can be easily and quickly restored without performing insulation treatment or reconnection treatment at the cut point 9B.

Further, the railway insulator device 6 of this embodiment has a mounting plate 14A.
, 14B, a non-linear resistor 22 is disposed between both fixed electrodes 18A, 18B. For this reason, lightning surges, etc. will occur near the construction area during the construction period. 15, the lightning surge does not flow to the bypass line 40 and connects to the nonlinear resistor 22 and ground! 36b, 37b, etc., and the bypass line 40 and the line insulator device 6 itself are protected from lightning surges. For this reason,
The bypass line 40 can be safely maintained without providing large-scale lightning protection equipment to the bypass line 40.

Also, when no construction is being performed, both fixed electrodes 18A are used.

Since the movable electrode 29 between 18B is energized, no electrical load is placed on the nonlinear resistor 22.

(Second Embodiment) Next, a second embodiment embodying the present invention will be described with reference to FIG. 8. This second embodiment differs from the first embodiment in the configuration of the voltage detecting section. That is, in this second embodiment, the tips of the voltage detecting terminals 52A, 52B are projected outward through the opening 60 of the stress cone 33, and an annular recess 61 is formed on the outer periphery of the projected portion. At the same time, a large diameter head 62 is formed. Each voltage detection terminal 52 is placed so as to cover this annular recess 61 and head 62
A block-like operating body 63 is attached to the protruding portions of A and 52B.

This operating body 63 is composed of an insulating part 64a that is slidably supported by each of the voltage detection terminals 52A and 52B, and a semiconductive covering part 64b that covers the entire outer peripheral surface of the insulating part 64a. A gap 65 is formed in the center of 64a to accommodate the head 62 and has an engagement surface 65a that engages and disengages from the head 62 as the insulating portion 64a slides. Further, a hook 66 is integrally formed on the outer surface of the covering portion 64b, and a metal ring 67 that is slidably fitted into the annular recess 61 is held on the stress cone side side of the covering portion 64b. A holding portion 68 is integrally formed, and each of the voltage detection terminals 52A, 52B is electrically connected to each operating body 63 via a metal ring 67 thereof.

In this embodiment, each operating body 63 is usually arranged in close contact with the outer surface of the stress cone 33, as shown by the solid line in FIG. 8, and is grounded through the stress cone 33. Then, before and after track construction, the hook 66 is locked with the connection terminal of the voltage detector, and when each operating body 63 is pulled to the right in FIG. 8 through the hook 66, the ring 67 and the annular recess 61 are When each operating body 63 is slid along each voltage detection terminal 52A, 52B through engagement, and the engagement surface 65a is engaged with the head 62, as shown by the two-dot chain line in the figure,
Its sliding is stopped. Then, a gap is formed between each operating body 63 and the stress cone 33, and the grounding state of each operating body 63 is released.

Therefore, at this time, the voltage between each branch conductor 30A, 30B and each electrode plate 50A, 50B can be detected by the voltage detector. Therefore, similarly to the first embodiment, the power supply state to the bypass line 40 and the grounding line 36b
, 37b can be reliably detected, and uninterrupted construction can be performed safely.

Note that the present invention is not limited to the above-mentioned embodiment, and for example, the non-linear resistor 22 is connected to the branch electrodes 31A, 31B.
The structure of each part can be arbitrarily changed without departing from the spirit of the invention, such as by connecting between the parts, or by separately providing the support arm 1 or the like, or by omitting the nonlinear resistor 22.

Effects of the Invention As detailed above, this invention has been achieved in advance! By installing it as a wire support insulator on the railway line, it is possible to reliably open and close the line at any point and switch to the bypass line at any time without directly touching the main line 11 line during construction. In addition, the state of power supply to the bypass line can be reliably detected before and after the switching, which provides an excellent effect in that uninterrupted construction can be performed simply and safely.

[Brief explanation of the drawing]

1 to 7 are drawings of a first embodiment embodying the present invention, in which FIG. 1 is a partially cutaway front view of a railway insulator device, and FIG. 2 is a partially enlarged plan cross-section of a voltage detector. Fig. 3 is a partially cutaway plan view of the opening/closing part, Fig. 4 is a plan view showing the installation state of the mounting bracket, Fig. 5 is a sectional view taken along the line X-X of Fig. 4, and Fig. 6 is a track insulator. FIG. 7 is a front view showing the installation state of the device on a pole, and is a circuit diagram of uninterrupted line construction during uninterrupted construction. FIG. 8 shows a second embodiment embodying the present invention, and is an enlarged side sectional view of the voltage detecting section. FIG. 9 is a road body circuit diagram of conventional uninterrupted construction. 5... Main line as electric wire, 8... Insulator body, 8a.
...Through hole, 18A, 1.8B...Fixed electrode, 23.
...Insulating tube, 29...Movable electrode, 30A, 30B...
・Branch conductor, 50A, 50B...electrode plate, 52A, 5
2B...Electricity detection terminal. Patent applicant Tokyo Electric Power Company Nippon Insulators Co., Ltd.

Claims (1)

[Claims] 1. An insulator body (
8), and a pair of fixed electrodes (18A, 18B) arranged opposite to one open end of the insulator body (8) and to which electric wires (5) on the power supply side and the load side of the line are respectively connected. , an insulating cylinder (23) held between the fixed electrodes (18A, 18B) and opening between the fixed electrodes (18A, 18B); ,1
A movable electrode (29) that can be opened and closed between the two fixed electrodes (18A, 18B) is connected to the other fixed electrode (18A, 18B) through the through hole (Ba) of the insulator body (8). At least one pair of derived branch conductors (30A, 30B) and the branch conductors (30A, 30B)
Electrode plates (50A, 50B) placed opposite to each other
) A line insulator device characterized in that it is provided with voltage detection terminals (52A, 52B) led out through the terminals (52A, 52B).