JPS5930992Y2 - Connections for bypass construction - Google Patents

Description

[Detailed explanation of the invention] This invention is used to connect the primary side of the pole-mounted transformer that supplies power to consumers and the bypass circuit when construction of high-voltage distribution lines is carried out using the bypass construction method. This relates to a connecting tool that allows for

In recent years, when constructing high-voltage distribution lines, in order to avoid forcing power outages to consumers as much as possible, a bypass circuit for high-voltage power is installed and the primary side of the pole transformer is connected to the bypass circuit using a connecting wire. The bypass circuit is connected to the circuit, and power is supplied to the consumer from the bypass circuit via the pole transformer.

However, the connection between the primary side of the above-mentioned pole transformer and the bypass circuit is difficult because the voltage is high and must be done while ensuring safety.

After making the connection and supplying power from the bypass circuit, remove the fuse of the high voltage cutout that is interposed between the primary side of the pole transformer and the high voltage distribution line. Work is carried out with the high voltage distribution line in a voltage-free state by preventing high voltage from flowing into the high voltage distribution line from the bypass circuit.

However, in this case, if the high voltage cutout is cylindrical, it is difficult to tell whether the fuse tube has been removed or not. There was a problem that high voltage was applied to the power distribution lines, which could lead to unforeseen dangers.

Therefore, the present invention aims to solve the above-mentioned problems by making it possible to connect the bypass circuit to the primary side of the pole transformer very quickly and easily. It is an object of the present invention to provide a connecting tool that can simultaneously confirm that a high-voltage distribution line and the primary side of a pole transformer are not connected when a fuse tube is pulled out.

The drawings showing the embodiments of the present application will be described below.

In Figure 1 showing the well-known bypass construction method, 1, 1...
... is a telephone pole, 2 is a high-voltage distribution line, A is the power supply side,
B indicates the load side.

3 is a jumper wire, 4 is a section switch, 5 is a high-voltage cutout, 6 is a pole-mounted transformer, 7 indicates its primary side, and 8 indicates its secondary side.

9 indicates a power consumer.

Next, 10 indicates the construction section of the high voltage distribution line 2.

Reference numeral 11 indicates a bypass circuit installed in this construction section 10, which includes a down cable 12, a rising cable 13, a main cable 14, a bypass switch 15 interposed between these cables, and a bypass circuit 15, which is connected to a branch body 16. ing.

Next, 17 indicates a branch switch, which is connected to the branch body 16 via a branch cable 18.

19 indicates a branch connection line. Next, the above voltage cutout 5
This will be explained based on FIGS. 2 to 4 of the drawings.

Reference numeral 21 denotes a main body made of porcelain, which, as is well known, is shaped like a hollow cylinder with a downward opening.

Reference numeral 22 denotes an upper fixed electrode, which is configured to be able to sandwich an upper electrode in a fuse cylinder, which will be described later.

23 is an upper sunrise wire connected to the upper fixed electrode 22 at one end, and connected to the high voltage distribution line 2 at the other end.

Reference numeral 24 denotes a lower fixed electrode, which is configured to sandwich a lower electrode in a fuse cylinder, which will be described later.

25 is a lower sunrise wire connected to the lower fixed electrode 24, and is connected to the primary side 7 of the pole transformer 6.

26 is a lower cover fixed to the lower end of the main body 21; 27
A lid is provided to close the lower opening of the lower cover 26, and is detachable from the lower cover 26.

In FIGS. 3 and 4, 28 indicates a fuse pipe connected between the upper fixed electrode (not shown) and the lower fixed electrode 24, and 29 indicates the lower electrode.

Next, the connecting tool 31 for connecting the branch connecting line 19 and the lower fixed electrode 24 of the high voltage cutout 5 will be explained.

Reference numerals 32 and 33 indicate holders, each of which is formed into a hollow cylindrical shape using an insulating material (for example, nylon).

Further, the holder 32 is formed to have a thickness that allows it to be inserted into the lower opening of the high voltage cutout 5.

Reference numeral 34 denotes an upper connecting body fixed to the upper end of the holder 32, which is made of a metal material and can be inserted and connected from below to the lower fixed electrode 24 of the high voltage cutout 5, similar to the lower electrode 29 of the fuse tube 28. It can be formed into any possible shape.

Reference numeral 36 denotes an upper contact piece, which is fixed to the upper connecting body 34 using a fixing screw 37 in an electrically conductive state.

Reference numeral 38 denotes a lower connecting body fixed to the holder 33, to which one end of the branch connecting wire 19 is fixed by a crimp terminal 38a.

The other end of the branch connection line 19 is connected to a branch switch 17 as shown in FIG.

A lower contact piece 39 is fixed to the lower connecting body 38 using a fixing screw 40.

Reference numeral 41 indicates a current-limiting type power fuse, and its upper and lower terminal fittings 42 and 43 are connected to an upper contact piece 36 and a lower contact piece 39, respectively.
There are end holes inside and they are electrically connected.

Note that both contact pieces 36.39 are connected to these terminal fittings 42.4.
It is formed into a tulip shape using a resilient metal material so as to have good contact with 3.

Reference numeral 45 denotes a collar protruding from the outer circumferential surface of the holder 32, and reference numeral 46 denotes a tightening ring provided on the outer circumferential side of the holder 32, which is rotatable relative to the holder 32.

The outer circumferential surface is also knurled to facilitate manual operation.

Reference numeral 47 denotes a retaining portion that can be engaged with the lower surface of the collar 45.

Numeral 48 is a tightening screw which can be screwed into a screw to be described later.

Next, in FIGS. 5 and 6 showing details of the fixture 50, reference numeral 51 indicates a holding part, which is formed into a hollow cylindrical shape with a thickness that can fit and cover the lower outer peripheral surface of the cutout 5. ing.

In addition, the length of this holding part 51 is such that when the holding part 51 is covered with the lower outer peripheral surface of the cutout, the fastened part 5 at the upper end thereof is
2 is formed to a length that allows it to be positioned above the position of the lower sunrise line 25 in the cutout 5.

53 is a fitting groove, and the stress cone 25 of the lower marking line 25
A is shaped so that it can be positioned as shown in FIGS. 2 and 5.

Reference numeral 55 denotes a holder insertion part, which is integrally and in communication with the holding part 51.

56 indicates a screw thread.

The fixture 50 described above is formed using an insulating material.

Next, reference numeral 60 indicates a fastener, which includes a fastening band 61.61 made of a metal material whose one end is screwed together, and a thumbscrew that fastens the other end of the fastening band 61.61. 62 and nut 63.

Next, when performing construction work such as relining the high-voltage distribution line 2 in the construction section 10 shown in FIG. This section explains the connection work.

First, as is well known, a bypass circuit 11 is constructed using various cables 12, 13, 14, a bypass switch 15, and a branch body 16.
is formed, and the branch cable 18 and branch switch 1
7 is connected.

After such connection is completed, the branch switch 17 and the primary side of the pole top cover 6 are then connected.

This connection is made as follows.

That is, the fitting 50 is first attached to the lower part of the high voltage cutout 5 prior to connection.

In this installation, the holding part 51 is covered with the lower circumferential side of the high-pressure cutout 5 so that the step part 50a of the fitting 50 comes into contact with the lower end 26a of the lower cover 26, and then the tightening tool is attached. 60.

Further, in the high-pressure cutout 5, the fuse tube 28 is extracted from the lower opening.

Next, the holder 33 of the connecting tool 31 is held in the hand of the working tool, and its upper end is inserted into the lower opening of the high voltage cutout 5 via the holder insertion part 55.

Then, the tightening screw 48 of the tightening ring 46 is screwed into the threaded engagement 56.

This screwing is performed with the tightening ring 46 firmly tightened.

Therefore, due to variations in the dimensions of the main body 21 of the cutout 5, the lower fixed electrode 2
Even if the distance to 4 is different for each of the various cutouts, the holder 32 can be moved upward by the above-mentioned raising, and the upper connecting body 34 can properly oppose the lower fixed electrode 24 to maintain a good electrical connection. is obtained.

When such a connection is completed, the switches 15 and 17 are then turned on, and power transmission from the bypass circuit 11 to the consumer 9 is started.

It should be noted that the closing of the switch 15, 17 may also occur prior to the connection of the connector 31 to the high-voltage cutout 5.

When the connection is completed as described above and power transmission from the bypass circuit 11 is started, the jumper wire 3 is then disconnected as usual, the section switch 4 is opened, and the high-voltage distribution line 2 in the construction section 10 is disconnected. The construction work will be carried out in a no-voltage state.

Next, FIG. 7 shows that during the connection work of the connector 31 as described above, a high-voltage cut is made in order to transmit power from the bypass circuit 11 to the consumer 9 in the same manner as when transmitting power from the high-voltage distribution line 2. This figure shows a connection body used appropriately when performing phase detection between the upper fixed electrode 22 of the output 5 and the branch cable 18 connected to the branch switch 17.

The connecting body 65 is made of a metal material, and a threaded portion 66 provided at its lower end can be screwed into the threaded hole 35 in the upper connecting body 34 .

Note that this connection body 65 is connected to the lower fixed electrode 2 of the cutout 5.
The cutout 5 is formed to have a length that can connect the upper connection body 34 connected to the cutout 4 and the upper fixed electrode 22 of the cutout 5.

This connecting body 65 is used in the following manner.

That is, after the fuse tube 28 is extracted from the high-pressure cutout 5 as described above, the connecting body 65 is attached to the upper connecting body 34 of the connecting tool 31.

(In this case, the branch switch 17 is in an open state.

) Next, the connecting body 31 equipped with the connecting body 65 is inserted and fixed into the high voltage cutout 5 in the same manner as described above.

In this state, the upper end of the connecting body 65 is connected to the upper fixed electrode 22, and the upper connecting body 34 is connected to the lower fixed electrode 24, respectively.

Next, in this state, phase detection is performed between the branch cable 18 and the branch connection line 19 connected to the branch switch 17.

Next, when it is confirmed that the phases match, the connecting tool 31 is once pulled out from the cutout 5 and the connecting body 65 is removed.

Next, the connector 31 from which the connector 65 has been removed is reinserted into the high-voltage cutout 5, and the switch 17 is turned on to start power transmission from the bypass circuit as described above.

As mentioned above, in this invention, the high voltage cutout 5
Since the upper connecting body 34 is provided at the upper end of the holder 32 so as to be able to connect the lower fixed electrode 24 to the fuse tube 28 interchangeably, in order to transmit power from the bypass circuit 11, When connecting the bypass circuit 11 and the primary side 7 of the pole-mounted transformer 6, simply insert the holder 32 into the high-voltage cutout 5 through the opening below it, and the bypass circuit 11 is connected to the primary side 7 of the pole-mounted transformer 6. The useful feature is that the circuit 11 can be connected and the connection work can be done very quickly and easily.

Moreover, in this case, since the configuration is as described above, by inserting the holder 32 as described above, at the same time as the electrical connection as described above, the fuse tube 28 has already been extracted, that is, the high voltage distribution line 2 The feature is that it can be confirmed that the upper fixed electrode 22 of the high voltage cutout 5 connected to the high voltage cutout 5 is not connected via a fuse to the lower fixed electrode 24 which supplies power from the bypass circuit as described above. There is.

During subsequent work on high-voltage distribution lines, high voltage was mistakenly applied to the high-voltage distribution lines, which were supposed to be voltage-free, through the cut-out fuse from the bypass circuit, endangering workers. There is a safety feature that can prevent accidents such as exposure.

Furthermore, when connected as described above and power is being transmitted from the bypass circuit, the fuse 41 provided in the holder 32 is interposed between the bypass circuit 11 and the pole transformer 6. Even if a short-circuit accident occurs and a large current flows in the above-mentioned state, there is a safety feature that allows the current to be quickly shut off.

Furthermore, in the civil engineering design, as mentioned above, holder 3
Lower fixed electrode 24 in cutout 5 by inserting 2
When connecting the upper connecting body 34 of the holder 32 to the holder 32, since the main body of the above-mentioned power supply is made of porcelain (fired product), there is generally a relatively large variation in dimensions between products.

), even if the dimension from the lower end of the lower opening to the lower fixed electrode 24 happens to be long, the cutout 5 can be removed by tightening the tightening ring 46.
The insertion depth of the holder 32 can be made deeper, and the upper connecting body 34 can be brought into proper contact with the lower fixed electrode 24 to establish a reliable electrical connection.

Moreover, since the holder 32 is tightened by the tightening ring 46 as shown in the upper part, it is necessary to securely maintain not only the electrical but also the mechanical connection state when the above connection is completed. Even if a worker working near the high-voltage cutout 5 accidentally touches and pulls the connection wire connected to the holder 32, the holder 32 against the high-voltage cutout 5 This prevents the holder 32 from being pulled out and causing a power outage, or the upper contact body 34 (to which high pressure is applied) exposed at the tip of the holder 32 that has been pulled out may be damaged by a worker. It is useful in preventing electric shock accidents caused by touching objects.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and Fig. 1 is a circuit diagram showing the bypass construction method, Fig. 2 is a vertical cross-sectional view showing the state in which a connector is attached to a high-voltage cutout, and Fig. 3 is a high-voltage cutout. Fig. 4 is a partial cross-sectional view along the line ■■-I■, Fig. 5 is a partial view showing the state in which the holder is fixed to the fixture, Fig. 6
The figure is a perspective view of the fixture, and FIG. 7 is a front view of the connection body. 5... Cutout, 24... Lower fixed electrode, 22... Upper fixed electrode, 28...
...Fuse tube, 11...Bypass circuit, 2.
...High voltage distribution line, 32...Holder, 3
4... Upper connection body, 38... Lower connection body, 41... Current limiting fuse, 46...
Tightening ring, 50...Mounting tool, 56...
・Threaded together.

Claims (1)

[Scope of utility model registration request] A cylindrical fixture is installed at the lower end of a high-voltage cutout in which the upper fixed electrode is connected to the high-voltage distribution line and the lower fixed electrode is connected to the pole transformer, and a hollow cylindrical holder formed to a thickness that allows insertion, and the upper part of the fixture is provided with a holding part configured to hold the lower peripheral surface of the high-pressure cutout; Moreover, a fitting groove is formed in the holding part into which the lower line of the high-voltage cutout is fitted, and furthermore, a fitting groove is formed in the upper part of the holding part, and the fitting groove is located between the upper end of the holding part and the fitting groove. between the upper end of the lower sunrise line and the upper end of the lower sunrise line, the band attachment width is sufficient to wrap a tightening band around the outer periphery of the holding part, and the holder can be inserted through the lower part of the fixture. The holder inserted part is provided with a screw thread around the holder inserted part, and an upper connecting body for connecting the lower fixed electrode is provided at the upper end of the holder. At the bottom,
A lower connecting body for connecting the bypass circuit is provided, a fuse is interposed between the two connecting bodies, a collar is formed on the outer periphery of the holder, and a ring-shaped flange is formed on the outer periphery of the holder. A tightening ring is provided so as to be rotatable relative to the holder, and the tightening ring has an engaging portion that engages with the lower surface of the flange, and is screwed onto the threaded screw. and a tightening screw designed to obtain the
The tightening screw is screwed onto the threaded screw when the holder is inserted into the cutout, the upper connecting body is connected to the lower fixed electrode, and the engaging portion is engaged with the lower surface of the flange. A connecting tool for bypass construction, characterized in that it is provided in a possible position.