JPS5820126B2 - induction electric appliances - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an induction electric appliance such as a transformer or an accelerator, and more particularly to an induction electric appliance having an improved bushing pocket provided on the upper surface of an outer box.

In an induction electric appliance, such as a transformer, as shown in FIGS. 1 and 2, the transformer contents 1 consisting of an iron core and windings are stored in an outer box 2, and each part is placed in a cover part 3 on the top surface of the outer box 2. Projecting bushing pockets 6, 7 are provided in each case for mounting the phase high voltage and universal voltage bushings 11, 12, and lead wires which are brought out of the transformer contents 1 and held in place by supporting insulators 5. 4.

This type of transformer has a structure in which the high-voltage bushing pocket 6 and the low-voltage bushing pocket 7 are separately protruded, so the outer box cannot be manufactured easily. Since the structures are different, the connection holes 8 and 9 used for connecting the lead wire 4 drawn out from the winding 1 and the high-voltage bushing 11 and the low-voltage bushing 12 are also provided separately. I have to.

Furthermore, since the high-pressure bushing pocket 6 and the low-pressure bushing pocket 7 are provided separately on both sides of the cover portion 3 so as to be parallel to the longitudinal direction of the outer box 2,
Since the mechanical strength was insufficient, it was necessary to attach reinforcing material 10.

Moreover, since the low-pressure bushing 12 is located at the center in the longitudinal direction of the cover part 3, the winding 1 and the low-pressure bushing 1
The lead wires 4 connecting the parts 2 and 2 are long, and the lead wires 4 must be fixed with several supporting materials 5, which has the drawback of requiring an unexpected amount of time to manufacture and assemble parts.

The purpose of the induction electric device of the present invention is to facilitate the manufacture of an outer box having a high mechanical strength and having a bushing pocket on the top surface.

In order to achieve the above object, in the present invention, a bushing pocket protruding from the upper surface of the outer box is formed in a box shape for each phase.
The present invention is characterized in that these are arranged perpendicularly to the longitudinal direction of the outer box, and high-pressure and low-pressure bushings are attached to these, respectively.

Hereinafter, the present invention will be explained using the embodiments shown in FIGS. 3 and 4, in which the same parts as the conventional ones are indicated by the same reference numerals.

The bushing pocket 13 protruding from the cover part 3, which is the upper surface of the outer box 1, is formed into a common box shape to which the high pressure and low pressure bushings 11 and 12 are attached at the same time, as shown in FIGS. 3 and 4. The bushing pocket 13 is provided so as to be perpendicular to the longitudinal direction of the outer case 2, and both ends of the bushing pocket 13 are extended to both sides of the outer case 2, respectively.

In this example, since it is a two-phase transformer, the bushing pocket 13 is separated for each phase of U, V, and W, and is attached to the cover part 3, and a high voltage bushing and a low voltage bushing are attached to each phase.

In this way, the bushing pocket 13 has a common box shape to which the high-pressure bushing 11 and low-pressure bushing 12 are attached, and the connecting band hole 14 is also a common shape, with U, V, W
Since each phase is separated and the structure is unified, the structure is simplified and the number of types can be reduced.

In addition, since the box-shaped bushing pocket 13 is provided perpendicularly to the longitudinal direction of the outer box 2, the mechanical strength of the cover portion 3 against the internal pressure of the transformer is improved, and the bushing pocket 13 also serves as a reinforcing material, which is different from the conventional one. Since no reinforcing material is required, the outer box 2 can be manufactured easily.

The lead wire 4 pulled out from the winding 1 and connected to each bushing 6.7 connects the bushing pocket 13 of each phase to U, V, W.
If they are provided above the windings of each phase, their length will be shortened, and the several support insulators that were conventionally required can also be omitted.

By configuring the induction electric device as in the present invention, the number of components of the outer box having the bushing pocket on the top surface can be reduced and the structure can be simplified, so it can be manufactured easily and in a short time.
Since the bushing pockets of each phase extending perpendicularly to the longitudinal direction of the outer case and extending to both ends are used as reinforcing materials, the mechanical strength of the outer case can be increased.

[Brief explanation of drawings]

Fig. 1 is a plan view of a conventional induction electric appliance, Fig. 2 is a front view of Fig. 1, Fig. 3 is a plan view of an induction electric appliance which is an embodiment of the present invention, and Fig. 4 is a front view of Fig. 3. It is a diagram. 1...Transformer contents, 2...Outer box, 11.12...
High pressure and low pressure bushings, 13...bushing pockets.

Claims (1)

[Claims] 1. In a device in which the contents of an induction electric device are housed in an outer box, and bushing pockets for attaching a plurality of bushings are provided protruding from the top surface of the outer box, the bushing pockets are formed into a box shape for each phase, and each of the bushing pockets is formed into a box shape for each phase, and each of the bushing pockets is formed into a box shape for each phase. An induction electric appliance, characterized in that it is provided so as to extend to both ends perpendicular to the longitudinal direction, and a high-voltage bushing and a low-voltage bushing are attached to each of the bushing pockets.