JPH0451459Y2 - - Google Patents

Description

[Detailed explanation of the idea] "Industrial application field" This proposal concerns underground transformers.

"Prior Art" A three-phase AC high voltage underground transformer used on the power supply side of excavators, blowers, pumps, etc. in mines or civil engineering propulsion shafts, etc.
The transformer was housed in one box and supported on one support stand. However, since the transformer has a large weight and volume, it is difficult to lower it into a narrow tunnel through a narrow vertical shaft, and it requires a lot of labor and time. Therefore, an attempt was made to house each transformer in a small box and disassemble it into three parts before lowering them into the mine. There is a problem in that it must be carried out in a narrow and dark mine, which requires a lot of labor and time.

``Problem that the invention seeks to solve'' This invention is easy to disassemble and transport into a narrow underground mine.
The aim is to obtain underground transformers that are easy to assemble and connect after delivery.

``Means for Solving the Problems'' In order to achieve the above purpose, this proposal provides a connection panel inside each of a plurality of transformer boxes, supports insulating joint rods on the panels, and connects the connecting rods. Both ends are connected to connecting terminals provided on both sides of the transformer box, and the terminals and short connecting rods are connected by bolting to connect the plurality of transformer boxes detachably. The underground transformer according to the above-mentioned invention is a specific invention in which one of the plurality of transformer boxes is connected to one end instead of the above-mentioned both ends, and the other end is connected to the above-mentioned panel; The underground transformer according to the above specification and the invention, which has an insulating joint rod whose other end is connected to the panel.The underground transformer according to each of the above inventions has a joint wire instead of the joint rod.

"Operation" Therefore, a plurality of transformer boxes 1, 1', 1'' (3 for three-phase AC) are lowered into an underground mine, and the transformer boxes 1, 1', 1'' are placed on the support stand 7. 1". Three terminals 4, 4, 4' protruding from one side of the first transformer box 1 serve as secondary terminals. Then, the four terminals 4 drilled on the other side of the first transformer box 1 and the four terminals 4, 4' protruding from one side of the second transformer box 1' are connected to the connecting shorts, respectively. Tighten and connect the rod 5 with the bolt 6. In addition, the two terminals 4 protruding from the other side of the second transformer box 1' and the two terminals 4' protruding from one side of the third transformer box 1'' are connected to the short connecting rods 5, respectively. Then tighten bolt 6 to connect.
Then, connect the high voltage power supply to the terminals of the primary side terminal boards 8, 8', 8'' provided on the three transformer boxes 1, 1', 1'', and connect the high voltage power source to the secondary side terminals 4, 4, 4'. It connects the load 9 and/or 10.

"Example" Multiple (three for three-phase AC) transformer boxes 1, 1',
Transformers 11, 11', and 11'' each having a primary and secondary coil are housed inside the box 1'', and a wiring panel 2 is provided in the box above the transformer.
In the first transformer box 1, the panel 2 is provided with an insulating joint 3.
The second transformer box 1' supports four transformer boxes, two of which are insulated from the panel 2. Joint joint made like this 3
Both ends of the transformer box 1 are provided protruding from both sides of the transformer box 1, and the coating 12 is peeled off to form a connecting terminal 4, and a bolt hole 13 is bored in the terminal 4 in the vertical or horizontal direction. The panels 2 of the first, second and third transformer boxes 1, 1', 1'' each have one end protruding to one side of the transformer boxes 1, 1', 1'' and are connected to terminals 4'. By drilling the bolt hole 13 in the terminal 4' and supporting a short insulating joint rod 3' whose other end is connected to the panel 2, one side of the first transformer box 1 is provided. 6 terminals 4, 4'
are installed protrudingly, and four pieces are installed on one side of the second transformer box 1'.
Two terminals are protruded from one side of the third transformer box 1'', four terminals 4 on the other side of the first transformer box 1, and four terminals 4 on one side of the second transformer box 1'. The terminals 4 and 4' are placed opposite to each other. Also, the two terminals 4 on the other side of the second container 1'
and the two terminals 4' on one side of the third container 1'', and the mutually opposing terminals 4, 4 and 4, 4'
A short copper connection rod 5 is passed to the terminals 4, 4, and bolt holes 13', 13' drilled at both ends of the short rod 5 are inserted into the terminals 4, 4.
and 4, 4' bolt holes 13, 13,
The terminals 4, 4 and 4, 4' are connected by inserting the bolt 6 and tightening the bolt. The container boxes 1, 1', 1'' can be placed on a support 7 as shown in FIG. 5, and the bolt holes 13, 13' can be aligned by positioning them by markings on the support 7. .In this state, the container box 1,
A high-voltage power source is connected to the terminals of the primary terminal board 8, 8', 8'' provided on the first box 1, and the three secondary terminals 4, 4, ’ load 9 or 10
(220v or 440v equipment). When transporting the container boxes 1, 1', 1'' out of the mine, it is sufficient to separate the bolts 6 from the bolt holes 13, 13', disassemble them, and transport them one by one.The joint rods 3,
3' may be a connecting line. In addition, 1 in the figure
4 is the lid of the container box 1, 1', 1'', 15
1 is a ground, 1a, 1b, and 1c are outer cases, and 16 is a waterproof connection band of the outer cases 1a, 1b, and 1c.

"Effects" Since the present invention is configured as described above, the plurality of transformers 11, 11', 11'' are connected to independent containers 1, 1,
1', 1'' and disassembled and carried into the mine, and after being carried in, not only can the terminals 4, 4' be connected very easily by tightening bolts with the short rod 5, but also it can be disassembled when taken out of the mine. It can be easily transported.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the proposed underground transformer;
FIG. 2 is a partially enlarged plan view of FIG. 1 showing the connecting portion, FIG. 3 is a perspective view of the connected state, and FIG. 4 is a wiring diagram. FIG. 5 is a front view of a conventional transformer box. 1, 1', 1''...Transformer box, 2...Connection panel, 3,3'...Insulation joint rod, 4,4'...Connection terminal, 5...Connection short rod, 6... …bolt.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A connection panel is provided inside each of a plurality of transformer boxes, and an insulating joint rod is supported on the panel,
Both ends of the connecting rods are connected to connection terminals provided on both sides of the transformer box, and the terminals and short connecting rods are connected by tightening bolts to removably connect the plurality of transformer boxes. An underground transformer formed to (2) A claim in which one of the plurality of transformer boxes has one end connected to the panel instead of the above-mentioned both ends.
(1) The underground transformer described. (3) The underground transformer according to claim (1), further comprising an insulating joint rod having one end connected to the panel at the other end instead of both ends. (4) Claims (1) to (3) that the above joint rod is replaced by a joint line.
Underground transformers listed respectively.