JPS63308817A - Insulator set for line - Google Patents

Abstract

PURPOSE:To make it possible to maintain safety, even if thunder surge invades the main line, in the normal closed condition by providing a lightning conductor element to earth, through itself, to one of a pair of branched electrodes. CONSTITUTION:An insulator 6 for line is fixed onto a supporting arm 1 and has an insulator main body 8 provided with a through hole 8a. A fixed electrode 18A on the power source side to which a jumper wire 9A is connected and a fixed electrode 18B on the loading side to which a jumper wire 9B is connected are so fixed as to oppose each other at one opening end of this main body 8. Between these electrodes 18A, 18B is provided an insulator 23 and inside this cylinder 23 is provided a movable electrode 29 which reciprocates inside the cylinder and opens or closes between electrodes 18A, 18B. And a pair of branched electrodes 31A, 31B which are connected to the electrodes 18A, 18B respectively through the through hole 8a of the main body 8 are so provided as to be conducted to the other opening end of the main body B. And an electrode 31B is provided with a lightning conductor element 52 leading to the earth.

Description

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

(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.
, 61b is the lead vA62 of the bypass switch 62.63.
a and 63a, and connect a bypass line 64 and a construction transformer 66 for low-voltage customers between both bypass switches 62 and 63 to form a bypass line 65, and within the construction section W. A bypass line 65 is connected to the load group 67 that was connected to the main line power line &6j61c. Then, after closing both the bypass switches 62 and 63 and energizing the bypass line 65, the main line is cut off on both sides of the construction section W by cutting the line around the line 68, and the ground line is connected to the side line 68. By connecting the power line M in the construction zone W
61c is grounded. In this state, work within the construction section W is carried out while power is being supplied to the load group 67 via the bypass line 65. Furthermore, after the construction is completed, the grounding wire will be removed, the previously disconnected edge wire 68 will be connected, and both bypass switches 6 will be connected.
The power outage of the bypass line 65 due to the open circuit of 2.63 and the removal of both lead wires 62a and 63a are performed sequentially.

(Problem to be solved by the invention) However, in the conventional construction method described above, the bypass switch 6
2. If you strip off the insulation coating of the electric wires 61a and 61b for connecting 63 to the electric wires 61a and 61b,
It is necessary to carry out various work such as cutting and reconnecting the 68, as well as insulating the parts where the coating is stripped and reconnected.
In addition, workers have many opportunities to come into contact with live wires, which not only requires a great deal of time and effort to prepare to ensure safety, but also reduces the lifespan of the main wires 61a to 61c due to damage or flooding. The problem was that it became shorter.

This application was filed in view of the above circumstances,
The purpose of this is to install the insulator on the power line in advance as a wire support insulator, so that during the aforementioned construction work, the line can be opened and closed at any time, and the connection can be switched to the bypass line at any time without directly touching the main wire. It is an object of the present invention to provide a railway insulator device that can perform uninterrupted work, etc. reliably, simply and safely.

A further object of the present invention is to maintain sufficient insulation strength of the main line and the wire support insulator even if lightning surge or other abnormal voltage enters the main line in a normal closed circuit state where no construction work is being carried out. An object of the present invention is to provide a railway insulator device that can ensure safety and maintain safety.

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 electrodes that are arranged opposite to each other and to which electric wires on the power supply side and the load side of the line are respectively connected; an insulating tube held between the double-sided constant electrodes and opened between the double-sided constant electrodes; A movable electrode that can reciprocate inside the cylinder to open and close between constant electrodes on both sides,
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 a lightning arrester connected to one of the branch electrodes and grounded through itself. element.

Therefore, the line insulator device can be closed and installed in advance in each predetermined section of the electric line and used as a wire support insulator. When carrying out uninterrupted construction work, etc. 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, If a ground wire is connected to each of the other branch electrodes, a bypass line can be easily laid without stripping the insulation coating of the wire during construction or the like. In this state, if the bypass switch is used to close the bypass line, power will be supplied to the bypass line from the line outside the construction area, and if the movable electrode is used to open the circuit between both fixed electrodes, the power supply to the main line in the construction area will be stopped. .

Also, after the construction work is completed, if the grounding wire is removed and the movable electrode is used to close the circuit between both fixed electrodes, power can be supplied to the main line in the construction section, and the bypass line is opened using a bypass switch to connect the bypass line to the bypass line. If the power supply is stopped and the bypass line is removed from the track insulator, the entire line will be restored.

Furthermore, in this invention, since one branch electrode is grounded via the lightning arrester, abnormal voltages such as lightning surges occur on the main line in the closed circuit state of a normal line insulator device that does not undergo the above-mentioned construction work. However, the main lines and track insulators themselves are protected by lightning protection elements.

(Example) Hereinafter, an example embodying the present invention will be described in detail based on FIGS. 1 to 6.

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

As shown in Fig. 1.2.5, the railway insulator device 6 is fixed on the support arm 1 via a base metal fitting 7, and has an insulator body 8 made of porcelain having a through hole 8a extending along the axis. and an opening/closing part IO disposed above the insulator body 8 and having jumper wires 9A and 9B connected to both the connecting fittings 4 on both sides.

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. 3 and 4, a pair of metal mounting plates 14A and 14B are provided above the insulating ItIi 13, and a through hole 8 is provided below the remounting plates 14A and 14B.
A connecting portion 14a is provided, which projects into the inside of the connecting portion 14a. One mounting plate 14A is connected and fixed to the insulating plate 13 via a pair of screws 15. A pair of female screw pieces 16 are embedded and fixed in the insulating plate 13 on the mounting plate 14A side, and the insulating plate 13 is fixed to the flange member 11 by screwing the female screw pieces 16 and bolts 17. Therefore, the mounting plate 14A is fixed to the flange member 11 via the screws 15, the insulating plate 13, and the bolts 17. On the other hand, a pair of female threaded pieces 16 are embedded and fixed in the mounting plate 14B, and the flange member 11 is embedded in the female threaded pieces 16.
A bolt 17 is screwed through the insulating plate 13 and the like, and the mounting plate 14B is fixed to the flange member 11 based on the screwing. Therefore, the number plates 14A and 14B are electrically insulated.

A support portion 14b that stands upward is integrally formed on the rear side of the reinstallation plates 14A and 14B, and as shown in FIG. A fixed electrode 18B on the load side to which an electrode 18A and a jumper wire 9B are connected are each tightened and fixed by screws 19. Furthermore, fixing pieces 14c are provided protrudingly from the inner ends of both the support portions 14b, and as shown in FIG.
A non-linear resistor 22 is clamped and fixed by an IAm rod 20 and a nut 21.

As shown in FIGS. 1 and 2, both the 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 24A and 24B formed in a cylindrical shape by a plurality of contact pieces 24a are attached to the ends of 8B, and arc-proof metal 24b is soldered to the tips thereof. That is,
Both electrode terminals 24A and 24B are arranged opposite to 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 cylinder 23, an arc-extinguishing cylinder 2G made of an arc-extinguishing material such as melamine resin is disposed between the electrode terminals 24A and 24B, and the arc-extinguishing cylinder 26 and the electrodes The inner cavities of the terminals 24A, 24B define a passageway 28 that communicates with each other on the 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 the insulating cylinder 23 and the mounting plate 14A,
14B, and between the insulating plate 13 and the mounting plates 14A, 14
The insulating plate 13 and the flange member 11 are fitted into the through hole 8a through the space between the insulating plate 13 and the flange member 11 to protect them. Further, on the outer wall of the covering member 27 on the side of the jumper wire 9B, there is a passage 28 parallel to the jumper wire 9B.
A guide groove 27a is formed which communicates with the guide groove 27a, and locking grooves 27b and 27c are formed at both ends of the guide groove 27a.

Further, within the passage 28, there is a movable electrode 29 having an arc-extinguishing rod 29b made of an arc-extinguishing material and an arc-resistant metal 29c fixed to one end.
is arranged so that it can be moved 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. Then, the insulating ring 29a of the movable electrode 29
As shown by the solid line in the figure, when the movable electrode 29 is engaged with one of the locking grooves 27b, the movable electrode 29 is connected to both fixed electrodes 18A and 18B.
pass through the electrode terminals 24A, 24B of both 18A, 18
The movable electrode 29 is arranged at a closing position to close the circuit between B and B.
, the ends of the main line 5 on the tension insulator 3 side are closed via both 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. 2, it is moved to the right along the guide groove 27a, and then the movable electrode 29 is returned By the U-shaped rotation movement, the other locking groove 27c is
When the two jumper wires 29a are engaged, the movable electrode 29 is placed in an open position where it penetrates only one electrode terminal 24B and the fixed electrode 18B, and the main wire 5 is opened between the jumper wires 9A and 9B. .

In the above, the movable electrode 29 is provided with a bent insulating ring 29a and rotated, but the insulating ring 29a may be a linear body and opened and closed only by horizontal movement. In this case, the locking groove 27b,
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 29c that extends in the axial direction on the outside of the movable electrode 29.
By providing ventilation with the outside, 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.
As shown in the figure, branch conductors 30A and 30B are fitted and connected at the upper ends of the connecting portions 14a of the mounting plates 14A and 14B, respectively.
The lower end passes through the through hole 8a and is led out from the lower open end of the insulator body 8 below. the rebranching conductor 30A,
Cylindrical branch electrodes 31A and 31B into which lead wires 36a and 37a and ground wires 36b and 37b of the bypass line 40 shown in FIGS. 5 and 6 can be inserted and connected are attached to the lower end of 30B. 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 bifurcated at the inner upper part of the through hole 8a, and the lower end is formed into a bifurcated shape. The portion 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.

Further, a branch electrode 31A is provided at the lower end of the insulating coating member 32.
, 31B rubber camp 35 for protecting the open end.
A and 35B are removably fitted. These rubber caps 35A and 35B are made of insulating N 35a and semiconducting layer 35.
It is composed of b.

A roughly U-shaped support member 41 is rotatably attached to the metal lid body 34 with a pair of bolts 42 so as to surround both rubber camps 35A and 35B, and an operation knob is provided at the center of the bottom of the support member 41. A support shaft 44 having a diameter of 43 is supported so as to be movable up and down. A pressing plate 45 is fixed to the upper end of the support shaft 44, and rubber caps 35A, 35B are attached to the upper surfaces of both sides of the pressing plate 45.
A retaining pin 47 that can be retained in an engaging recess 46 on the lower surface of each of the retaining pins 47 is provided in a protruding manner. The pressing plate 45 is normally urged upward by the action of the spring 48 fitted into the support shaft 44, and through the engagement between the engagement pin 47 and the engagement recess 46, both the rubber caps 35A, 35B is held in the attached state,
When the support member 41 is rotated backward after the pressing plate 45 is moved downward by the operation knob 43 and the engagement bottle 47 is disengaged from the engagement recess 46, the camp 35A,
35B can be removed from the branch electrodes 31A and 31B.

Further, a protrusion 49 is integrally formed on the outer side of the lower end of the one rubber cap 35B. An insulating rod 50 is provided at the center of the protrusion 49, and a plurality of current collector plates 51 and lightning arrester elements 52 made of non-linear resistors are alternately stacked on the insulating rod 50. A conductive plate 53 is fixed to the inner end of the insulating rod 50 with a nut 54, and a contact 55 that can be inserted into one branch electrode 31B is protruded from the upper surface thereof. A connection terminal 56 is fixed to the outer end of the insulating rod 50 and connected to a grounding voltage vA57. Therefore, when the caps 35A and 35B are installed as shown in FIG.
One branch electrode 31B is grounded via a lightning arrester element 52.

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
The book 15 is closed via the.

For example, as shown in Figure 5.6, the utility poles PI, 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 35A and 35B of the pair of track insulator devices 6 installed on both sides of the construction zone are removed by pulling down the pressing plate 45 using the operation knob 43 and rotating the support member 41. After that, the left branch electrode 31A of the line insulator device 6 shown on the left side in FIGS.
The connection terminals of the lead wires 36a and 37a of the bypass switch 36 and 37 are inserted and connected to the right branch electrode 31B of the line insulator device 6 shown on the right side, and the branch electrodes 31A and 31B are arranged in parallel with each other. Electrode 31A, 3
The connection terminals of the ground wires 36b and 37b are inserted and connected to 1B, respectively. A bypass line 38 is connected between the bypass switches 36 and 37, and the lead wires 36a, 37a and the switches 36 and 37 constitute a bypass line 40, and a low voltage line is connected via the bypass line 38. construction transformer 3
Connect 9. Next, the load group (the route shown) that has been previously connected to the main line 5 via the cutout or other protective fuse 5a, the transformer 5b, and the low-voltage line R in the construction section is connected to the bypass line 40 via the low-voltage line R. . Then, after closing the bypass line 40 using both bypass switches 36 and 37 and ensuring an uninterrupted state inside and outside the construction zone,
Insulating rods 29 in each track insulator device 6 on both sides of the construction zone
Based on the operation in step a, the movable electrodes 29 are respectively switched to the open circuit position and arranged. In this state, the book 'fa5' of the construction section is
At the same time, power is supplied from the zero wire 5 outside the construction zone to the bypass line 40, and the bypass line 4
While supplying power to a group of high-voltage or low-voltage loads through the power supply line 0, various types of construction work such as load addition can be carried out in an uninterrupted state in a construction section.

After that, when the track construction is completed, the grounding 4i3sb and 37b are removed from the branch type fi31A and 31B in the track insulator device 6 on both sides of the construction section, respectively, and the insulating rod 29a
When the movable electrode 29 is returned to the closing position based on the operation and the main line 5 is closed, power supply to the main line vA5 in the construction section is restarted. Also, if you sequentially open the bypass line 40 using both bypass switches 36 and 37 and remove the leads 'a 36a and 37a, you can do it! ll! jI5 is completely restored.

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 main line 5, and the movable electrode 29 can be easily and quickly laid. Jumper wire 9A based on operation
, 9B can be reliably opened and closed in the construction section without cutting the main line 5. Furthermore, after the completion of construction, the insulation and coating of the main line 5 and the jumper wire 9 will be removed.
A.

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. Therefore, even if a lightning surge or the like enters the main vA5 near the construction area during the construction period, the lightning surge will not flow to the bypass line 40, but will flow through the non-linear resistor 22, the ground vA36b, 37b, etc. It is quickly grounded, and the bypass line 40 and the insulator bag W6 for the line itself are protected from lightning surges.Therefore, the bypass line 40 can be maintained safely without providing large-scale lightning protection equipment to the bypass line 40. be able to.

On the other hand, during normal times when no construction work is carried out, both fixed electrodes 18A,
18B is closed by the movable electrode 29, and the movable electrode 29 is energized, so no electrical load is placed on the nonlinear resistor 22. Further, in this normal state, one branch electrode 31B is grounded via the lightning arrester element 52 with the rubber camps 35A and 35B attached. Therefore, even if a lightning surge or the like invades the zero wire 5 near the line insulator device 6, the lightning surge will be transmitted to one branch conductor 30B1 branch electrode 3.
1B, contact 55. Lightning arrester 52 and grounding voltage vA57
etc., and the zero wire 5 and the track insulator device 6 themselves are protected from lightning surges.

(Another Embodiment) Next, another embodiment of the present invention will be described with reference to FIG. 7. In this embodiment, a rubber cap 35A is used.

Above 35B, a protrusion 49 is integrally formed on the outside of the covering member 32 that covers the branch conductors 30A and 30B, and within the protrusion 49, a current collector plate 51 and a lightning protection element having almost the same configuration as in the previous embodiment are installed. An insulating rod 50 made up of stacked insulating rods 52 is buried, and its inner end is connected and fixed to one branch conductor 30B via a conductor 58. Therefore, in this embodiment as well, lightning surges during normal times are grounded through the lightning arrester 52 and the like, and the zero wire 5 and the line insulator device 6 themselves are protected from lightning surges.

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 gist 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, according to the present invention, it can be used as a wire support insulator at all times, and it can be used without processing the main wire during uninterrupted line construction (opening/closing of the line and switching to a bypass line). The connection can be made reliably, and construction work can be carried out easily and safely, which is an excellent effect.Furthermore, according to the present invention, in a normal main line closed state where no construction work is being carried out, Even if a lightning surge or the like invades the main line, safety can be maintained by ensuring sufficient insulation strength of the main line and track insulator device.

[Brief explanation of the drawing]

1 to 6 are drawings of an embodiment embodying the present invention, in which FIG. 1 is a partially cutaway front view of a railway insulator device;
Fig. 2 is a partially cutaway plan view showing an enlarged view of the opening/closing part, Fig. 3 is an enlarged plan view showing the mounting state of the mounting bracket, Fig. 4 is a sectional view taken along the line X-X of Fig. 3, and Fig. The figure is a front view showing a state in which the insulator device for railway lines is mounted on a pole, and Fig. 6 is a circuit diagram of uninterruptible construction of railway lines during uninterruptible construction work. FIG. 7 is a partially cutaway front view of a railway insulator device showing another embodiment of the present invention. FIG. 8 is a road body circuit diagram for conventional uninterrupted construction. 5... Main line as electric wire, 8... Insulator body, 8a.
...Through hole, 18A, 18B...Fixed electrode, 23...
・Insulating cylinder, 29...Movable electrode, 31A, 31B...
branch electrode, 49... protrusion, 52... lightning arrester element, 5
5... Contact, 57... Grounding wire.

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) and connected to the other open end through the through hole (8a) of the insulator body (8). A pair of branched electrodes (31A,
31B); and a lightning arrester (52) connected to one branch electrode (31B) and grounded via itself. 2 The lightning arrester (52) has one branch electrode (31B
) The track insulator device according to claim 1, wherein the insulator device is detachably connected to the insulator device. 3 The lightning arrester (52) has one fixed electrode (18B
) and the branch electrode (31B).
30B), the track insulator device according to claim 1.