JPH0214180Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a tank for electrical equipment, and particularly relates to a tank for electrical equipment having a connecting reinforcing metal fitting connected between a stay and a vertical stay.

[Background of the idea]

Generally, an electrical equipment tank, such as a transformer tank, that stores the contents of an electrical equipment is constructed as shown in FIG. That is, the transformer tank includes a lower tank 2 in which a core wrapped with a coil, which is the transformer contents 1, is housed in the middle thereof, and a flat cover 3 that covers the upper part of the lower tank 2. It is composed of a C-shaped connection reinforcing metal fitting 6 that connects the stay 4 provided on the upper part of the tank 2 and the vertical stay 5 provided on the outer periphery of the lower tank 2.

In a transformer tank configured in this way, if the internal pressure is relatively low, such as in the case of a transformer containing mineral oil, the connection between the lower tank 2 and the cover 3 may be caused by an internal accident in the transformer tank. In order to prevent the explosion of the
and may be welded to the stay 4. (Tokukai Akira
(See Publication No. 57-10911).

By the way, if the connection reinforcing metal fittings 6 are made into such a welded structure, during a water pressure test between the lower tank 2 and the cover 3, the lower tank 2 and the cover 3 will be temporarily fixed at the flange 7 using a plurality of fixing metal fittings called C clamps. At the same time, the welded parts had to be dismantled in order to verify the strength by once welding the connection reinforcing metal fittings 6 and to insert the transformer contents 1 into the lower tank 2 and assemble them. Therefore, not only is it not easy to assemble the electrical device 1, but also it is not possible to assemble the electrical device 1 in the state at the time of strength verification.
There was a feeling of unreliability.

For this reason, it is conceivable to connect the stay 4 of the cover 3 and the vertical stay 5 of the lower tank removably with bolts using a connection reinforcing metal fitting, but with this connection method, the force due to the internal pressure of the tank is Since shear stress is applied to the bolts, there is a drawback that a large number of bolts must be used to maintain a given strength.

[Purpose of invention]

This invention was created in view of the above points,
The object of the present invention is to provide a tank for electrical equipment that can be easily assembled and has improved mechanical strength and reliability.

[Summary of the idea]

In other words, in the present invention, the connecting reinforcing metal fittings have an inverted T-shaped end.
the end thereof is engaged with a locking metal fitting fixed to the outer surface of the vertical stay of the lower tank,
Moreover, the vertical stay of the lower tank and the stay of the cover are detachably attached using bolts.

[Example of idea]

Hereinafter, the present invention will be explained based on the illustrated embodiments. An embodiment of the present invention is shown in FIGS. 2 and 3. It should be noted that the same parts as in the prior art have been given the same reference numerals, so their explanation will be omitted. In this embodiment, the connection reinforcing metal fitting 6a used in an inverted L-shape is partially formed into an inverted T-shape so that its end is connected to the locking metal fitting 8 fixed to the outer surface of the vertical stay 5. The vertical stay 5 of the cover 3 and the stay 4 of the flat plate-like cover 3 are detachably attached with bolts 9. By doing this, it becomes possible to reassemble the lower tank 2 and the cover 3 in a state whose strength has been verified by a water pressure test, so it is possible to obtain a tank for electrical equipment whose reliability in mechanical strength can be improved. Can be done.

That is, the connection reinforcing metal fitting 6a that connects the vertical stay 5 and the stay 4 of the cover 3 with strength has an inverted T-shaped portion at the end engaged with a locking metal fitting 8 welded to the outer surface of the vertical stay 5 in advance. Further, bolts 9 were tightened and fixed to each of the vertical stay 5 and the stay 4 in a detachable manner. In this way, the connection reinforcing metal fitting 6a
Since it is attached detachably, when inserting the contents of the transformer into the lower tank 2 and assembling it after verifying its strength by a water pressure test, all you have to do is loosen the bolts 9 and remove the connection reinforcing metal fittings 6a. There is no need to disassemble the welded parts, and the transformer can be easily assembled. To reassemble the connecting reinforcing metal fittings 6a and the cover 3 after assembling the transformer, first lock the connecting reinforcing metal fittings 6a with the locking metal fittings 8 of the vertical stay 5, and then tighten the bolts 9 on the stays 5 of the lower tank 2.
If the stay 4 of the cover 3 is connected to the stay 4 of the cover 3, the state at the time of strength verification can be obtained, and the reliability of the mechanical strength of the tank can be improved. In addition, since the connecting reinforcing metal fitting 6a is engaged with the locking metal fitting 8 welded to the outer surface of the vertical stay 5 in advance, the force applied to the flat cover 3 due to internal pressure is shared by this engagement. No shearing stress is applied to the bolts 9 for attaching the connecting reinforcing metal fittings 6a, and the connecting reinforcing metal fittings 6a can be used as reinforcing metal fittings for the lower tank 2 and the cover 3 with sufficient strength.

In addition, at the stage when the lower tank 2 and cover 3 are manufactured, a water pressure test is conducted to verify whether they can withstand a predetermined pressure. A locking metal fitting 8 is positioned on the outer surface of 5 and firmly fixed by welding. In addition, in the figure, 10 is a gasket.

[Effect of idea]

According to the present invention, the end of the inverted L-shaped connection reinforcing metal fitting is formed into an inverted T-shape, and this end is locked to the locking metal fitting fixed to the outer surface of the vertical stay of the lower tank, In addition, the vertical stays and the connections between the stays are made removable using bolts, making it easy to reassemble to the state at the time of the strength test, making it possible to create a tank for electrical equipment that improves reliability of mechanical strength. Obtainable.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of a conventional tank for electrical equipment.
FIG. 2 is a side view of the vicinity of the connection reinforcing metal fittings of an embodiment of the tank for electrical equipment of the present invention, and FIG. 3 is a partial vertical sectional view of the same embodiment. 1...Transformer contents, 2...Lower tank, 3...Cover, 4...Stay, 5...Vertical stay, 6a...
Connection reinforcing metal fitting, 8...Locking metal fitting.

Claims (1)

[Scope of utility model registration request] Electrical equipment is stored inside the lower tank, a flat cover covering the upper part of the lower tank is attached to the lower tank, and a stay provided on the upper part of the cover and a vertical stay provided on the outer periphery of the lower tank are connected, Reverse L
In a device that is removably connected using a letter-shaped connection reinforcing metal fitting, a locking metal fitting is fixed to the outer surface of the vertical stay of the lower tank at a position close to the cover, and the connection reinforcing metal fitting is formed in an inverted T-shape. 1. A tank for electrical equipment, wherein the end portions thereof are engaged with locking metal fittings, and are detachably attached to the vertical stay and the stay and bolts, respectively.