JPS63126125A - Insulator for line - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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.
, 41b is the lead wire 42a of the bypass switch 42.43.
, 43a, and connect a bypass line 44 and a construction transformer 46 for low-voltage consumers between both bypass switches 42 and 43 to form a bypass line 45, and connect the main line within the construction section W. The bypass line 45 is connected to the load group 47 that was connected to the electric wire 41C. Then, after closing both the bypass switches 42 and 43 to energize the bypass line 45, the edge line 48 of the track is cut on both sides of the construction section W to cause a power outage to the main line, and the edge line 48 is cut off on both sides of the construction zone W.
Electric wire 41c in construction section W by connecting the grounding wire to
Ground. In this state, work within the construction section W is carried out while power is being supplied to the load group 47 via the bypass line 45.

In addition, after the construction is completed, the grounding wire is removed, the previously disconnected edge line 48 is connected, and both bypass switches 42.4 are installed.
The power outage of the bypass line 45 due to the opening of No. 3 and the removal of both lead wires 42a and 43a are performed sequentially.

(Problem to be solved by the invention) However, in the conventional construction method described above, the bypass switch 4
Electric wire 4 for connecting 2.43 to electric wires 41a and 41b
It is necessary to perform various operations such as stripping off the insulation coating of 1a and 41b, cutting and reconnecting the edge wire 48, and insulating the area where the coating is stripped off and the area where it is reconnected, and
Workers have many opportunities to come into contact with 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 4B to 41c or shortens the life of the wires due to water intrusion. There was a problem.

Additionally, during the construction period, there is an unforeseen risk that lightning surges or other abnormal voltages may enter the bypass line 45, so it is necessary to ensure the same insulation strength for the bypass line 45 as for the main line. Therefore, there was a problem in that the entire bypass facility became large-scale.

This application was filed in view of the above circumstances,
The purpose of the first invention is to install an electric wire support insulator on the electric line in advance so that the electric 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 line electric wire. To provide a track insulator device that can reliably perform uninterrupted work simply and safely.

In addition to the object of the first invention, the object of the second invention is to provide self-defense protection against lightning surges, etc. during the construction period, without making the bypass equipment large-scale, and to improve the safety of the bypass line. An object of the present invention is to provide a railway insulator device that can maintain its properties.

Structure of the Invention (Means and Effects for Solving Problems) In order to achieve the above-mentioned object, the first invention of this application includes an insulator body having a through hole opening at both ends, and an insulator body having a through hole opening at both ends. A pair of fixed electrodes arranged opposite to one open end and to which electric wires on the power supply side and the load side of the line are respectively connected, and an insulating tube held between the two fixed electrodes and opened between the two fixed electrodes. and a movable electrode that can reciprocate within the insulating cylinder to open and close between the fixed electrodes, and a movable electrode that is connected to the fixed electrodes and guided to the other open end through the communication cavity of the insulator body. At least one pair of branch electrodes are provided.

Therefore, the line insulator device can be closed and set in advance for each predetermined section of the electric line and 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 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. .

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 stopped and the bypass line is removed from the track insulator, the entire line will be restored.

On the other hand, in the second invention of this application, in addition to the configuration of the first invention, a non-linear resistor is connected between both fixed electrodes. Therefore, uninterruptible construction can be performed using the same procedure as in the first invention, and since the non-linear resistor is grounded at the same time as the grounding wire is connected to the branch electrode, lightning surges etc. can occur during the construction period. Even if an abnormal voltage occurs, the bypass line and the line insulator device itself are protected by the non-linear resistor. Furthermore, since both fixed electrodes are connected by the movable electrode when construction is not being performed, no electrical load is placed on the nonlinear resistor.

(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 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,
Main wires 5 as electric wires are connected to each other via connecting fittings 4, and line insulator devices 6 are respectively erected and fixed via base fittings 7 shown in FIG.

As shown in FIGS. 1 and 2, the track insulator device 6 is a porcelain insulator that is fixed on the support arm 1 via the base metal fitting 7 and has a communication cavity 8a extending along the axis. It is composed of a main body 8 and an opening/closing part 10 which is arranged on the upper part of the insulator main body 8 and has 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 plate B
is installed.

As shown in FIGS. 3 and 4, a pair of metal mounting plates 14A and 14B are provided above the insulating plate B, 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 B via a pair of screws 15. Further, a pair of female screw pieces 16 are embedded and fixed in the insulating plate B on the mounting plate 14A side, and the insulating plate B is fixed to the flange member 11 based on the screw engagement of the female screw pieces 16 and bolts 17. Therefore, the mounting plate 14A includes the screws 15, the insulating plate B, and the bolts 17.
It is fixed to the flange member 11 via. 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 through the flange member 11, the insulating plate B, etc., and the installation is performed based on the screwing. A plate 14B is fixed to the flange member 11. Therefore, the two attachments 114A 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 a fixed electrode 18A on the power supply side to which a jumper wire 9A is connected and a jumper wire 9B are connected to the outer end of the support portion 14b. The connected fixed electrodes 18B on the load side 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 1.

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 with both constant voltages 118A and 18B, respectively. or,
Inside the insulating cylinder 23, both fixed electrodes 18A, 1
Electrode terminals 24A and 24I3 formed into a cylinder 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, and both fixed electrodes 18A.

18B, the non-linear resistor 22, the insulating cylinder 23, jumper wires 9A, parts of 9B, etc. are molded with a covering member 27 made of BP rubber (ethylene propylene rubber), and a part of the covering member 27 is formed with the insulating cylinder 23. Mounting plates 14A, 14
The flange member 11 is fitted into the through hole 8a between the insulating plate B and the mounting plates 14A and 14B, and covers and protects the outer periphery of the insulating plate B and the flange member 11.

Further, a guide groove 27a is formed on the outer wall of the covering member 27 on the side of the jumper wire 9B, and is parallel to the jumper wire 9B and communicates with the passage 28, and locking grooves are formed at both ends of the guide groove 27a. 27b and 27C are formed. or,
Inside the passage 28, an arc extinguishing rod 2 made of an arc extinguishing material is disposed at one end.
A movable electrode 29 having a fixed electrode 9b is arranged so as to be movable back and forth.

The other end of the movable electrode 29 passes through one fixed electrode 18B and guides the covering member 27. An insulating rod 29a for operation, which is bent and formed at the end thereof, is led out to R21a. When the insulating rod 29a of the movable electrode 29 is engaged with one of the locking grooves 27b as shown by the solid line in FIG.
B through the electrode terminals 24A, 24B and both 18A, 1
The movable electrode 2 is placed at a closing position where the circuit is closed between 8B and 8B.
9. A circuit is closed between the ends of the main line 5 on the tension insulator 3 side 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 As shown by the two-dot chain line in FIG. 1, the other locking groove 27 is
When the insulating rod 29a is engaged with the insulating rod 29a, 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 line 5 is opened between the jumper wires 9A and 9B. .

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 FIGS.
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 communication cavity 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 rubber cap 35 for protecting the open ends of the branch electrodes 31A and 31B is removably fitted to the lower end of the insulating coating 32. This rubber cap 35 is composed of an insulating Fi 35a and a semiconducting layer 35b, and in the attached state, the stress cone 3
It is grounded via 3.

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 open position shown by the solid line in FIG. 1, and the jumper wires 9A, 9
The main line 5 is closed via B.

For example, as shown in Fig. 5.6, electric 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 camps 35 of the pair of track insulators 6 installed on both sides of the construction zone are removed, and the fifth
, 6, 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 W6 shown on the left side and the right branch electrode 31B of the track insulator device 6 shown on the right side. The connection terminals are fitted and connected, and the connection 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, 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 to ensure an uninterrupted state inside and outside the construction zone, each track insulator device 6 on both sides of the construction zone
In this step, the movable electrodes 29 are switched to the open position based on the operation of the insulating rods 29a. In this state, power supply to the main line 5 in the construction zone is stopped, and power is supplied from the main line 5 outside the construction zone to the bypass line 40,
While power is being supplied to a group of high-voltage or low-voltage loads via the bypass line 40, 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 wires 36b and 37b are removed from the branch electrodes 31A and 31B in the track insulator device 6 on both sides of the construction section, respectively, and the movable electrode 29 is returned to the closed circuit position based on the operation of the insulating rod 29a. When the main line 5 is closed, power supply to the main line 5 in the construction section is resumed. Furthermore, 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 main line 5 can be 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 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.

The railway insulator device 6 of this embodiment also includes a mounting plate 14A.
, 14B, a non-linear resistor 22 is disposed between both fixed electrodes 18A, 18B. Therefore, even if lightning surge or the like enters the main line 5 near the construction area during the construction period, the snow surge will not flow to the bypass line 40 (via the non-linear resistor 22, grounding wires 36b, 37b, etc.). The bypass line 40 and the line insulator device 6 themselves are protected from lightning surges.Therefore, there is no need to provide large-scale lightning protection equipment to the bypass line 40 (the bypass line 40 can be safely installed). can be maintained.

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.

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.

In the above, the insulator device for railway lines of the present invention has been described only for switching connection to bypass lines, but other applications include connection of down lines to transformers and connection of contact lines to nearby lines. Of course, it can also be connected to regular or temporary branch lines, such as connection to underground cables, and can be used in a variety of ways as track equipment.

Effects of the Invention As detailed above, according to the first invention of this application, it can be used as a wire support insulator at all times, and can be used to open and close the line and connect it to the bypass line without processing the main line electric wire during uninterrupted line construction. Switching connections can be made reliably,
It has the excellent effect of making construction work easier and safer.

Further, according to the second invention, in addition to the effects of the first invention, the bypass line and the insulator surface for the line can be reliably protected against lightning surges without making the bypass line equipment large-scale. It has the excellent effect of being able to

[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 of the opening/closing part, Fig. 3 is a plan view showing the installation state of the mounting bracket, Fig. 4 is a sectional view taken along the line X-X of Fig. 3, and Fig. 5 is a diagram of the railway insulator device. A front view showing the pillar installation state,
FIG. 6 is a circuit diagram of uninterrupted line construction during uninterrupted construction. FIG. 7 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, 22...
・Non-linear resistor, 29...Movable electrode, 31A, 31B
...Branch electrode. 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) and connected to the other open end through the through hole (8a) of the insulator body (8). A line insulator device comprising at least one pair of derived branch electrodes (31A, 31B). 2 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. , a nonlinear resistor (22) connected between the two fixed electrodes (18A, 18B), and a nonlinear resistor (22) that is also held between the two fixed electrodes (18A, 18B) and opened to both the fixed electrodes (18A, 18B). Insulating cylinder (23
) and both fixed electrodes (18A, 1
A movable electrode (29) that can be opened and closed between the insulator body (8B) and both fixed electrodes (18A, 18B) are connected to each other and led out to the other open end through the through hole (8a) of the insulator body (8). at least one pair of branched electrodes (3
1A, 31B).