JPH071767Y2 - Electric equipment with cooler - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application This invention relates to an electric device such as a transformer having a semi-pool type cooler.

B. Outline of the Invention The present invention relates to an electric device having a semi-pool type cooler, in which the winding of the internal device is housed, and a tap winding and a lead terminal pressing member are provided on the outer peripheral side of an insulating inner container filled with an insulating liquid. By winding and constructing the device, the device can be configured with good sealing property without providing a large number of through holes in the insulating inner container.

C. Conventional Technology As a conventional electric device with a cooler, there is a semi-pool type transformer as illustrated in FIG.

This is the device main body tank 1 in which the insulating inner container 2 is stored,
The iron core 3 and the winding wire 4 are installed in the insulating inner container 2.

The insulating container 2 is filled with the insulating liquid, and the tank 1
An insulating gas is filled in the space between the insulating inner container 2 and the insulating inner container 2 for electrical insulation.

In addition, the iron core 3 and the winding 4 that generated heat during the use of this transformer
In order to cool the internal insulation container 2 and the cooler 5 provided outside the tank 1, the internal conduit 2 is connected and communicated with the cooling device 5, and the internal insulating liquid is circulated to save resources. It was designed to improve economy and reduce weight.

Further, in this semi-pool type transformer, a tap winding may be arranged for voltage adjustment (changing the number of turns of the winding, changing the resistance value). In general, since this tap winding requires a large number of lead terminals, a large number of lead terminal through holes are provided in the insulating inner container, the lead terminals are drawn out from the through holes, and the terminal through portions are sealed. I was making up.

D. Problems to be Solved by the Invention In the electric device with a cooling machine as described above, if the insulating liquid leaks from the insulating inner container 2, the insulation and cooling performance is extremely deteriorated. The seal of the container 2 is an extremely important factor in the reliability of the device. However, when a large number of tap lead-out terminals penetrating the in-insulation container 2 are provided, the number of sealing points increases, and the leakage of the insulating liquid easily occurs, which lowers the reliability of the device. there were.

Further, since there are a large number of tap lead-out terminals that penetrate the insulating inner container 2, there is a problem that the sealing structure of the lead-out terminal penetrating portion becomes complicated and the manufacturing cost of the device increases.

Further, in order to prevent the through hole from being provided in the insulated inner container, a means of separately installing a voltage regulator outside the main body of the device can be considered, but this will install a voltage regulator separate from the main device. However, there is a problem that it is not suitable for realization because the equipment installation area is increased and the equipment cost is also increased.

The present invention has been made in view of the above points, and an object of the present invention is to newly provide an inexpensive electric device with a cooler in which tap windings are arranged in the device body without providing a large number of sealing points in the insulating inner container. To do.

E. Means for Solving the Problems In the electric device with a cooler of the present invention, the winding of the internal device is housed in an insulating inner container, and the outermost insulating cylinder is wound to form a tap winding. It is characterized in that the output terminal portion of the tap winding is supported by the output terminal pressing member, and the outer peripheral wound material of the insulating inner container is wound and fastened by a winding band.

F. Action By configuring as described above, the insulating inner container filled with the insulating liquid does not have to be provided with a large number of through holes for tap lead-out terminals, and the reliability of the seal at that portion is improved,
This has the effect of improving the reliability of insulation and cooling of the device.

G. Example An example of an electric device with a cooler according to the present invention will be described below with reference to FIGS. 1 and 2.

In addition, in FIGS. 1 and 2, the portions corresponding to those in FIG. 3 described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is an overall schematic configuration diagram, in which 1 is a tank of the device main body,
3 is an iron core, 4 is a winding wire, and 5 is a cooler.

In the device of this example, only the winding 4 portion is housed in an insulating inner container 7 having a rectangular cylindrical cross section, and the inside is filled with an insulating liquid.

In addition, the insulating inner container 7 and the cooler 5 are connected and communicated with each other through a circulation pipe line 8. Along with this, as shown in the drawing, the circulation line 8
Circulating pipelines 9 are provided so as to branch from the upper and lower portions respectively and to connect and communicate with both ends of through holes that penetrate the iron core 3 so as to cool the iron core 3.

Then, the insulating liquid in the insulating inner container 7 and the circulation pipelines 6, 8, 9 is
It is circulated to the cooler 5 and cooled from the inside.

In the device of this example, the main winding 4 of the tap winding of the semi-pool type load tap transformer is housed in the insulating inner container 7, and the tap winding 10 is arranged outside the insulating inner container 7. The insulating cylinder is arranged as a winding form.

That is, as shown in the enlarged schematic sectional configuration diagram of the main part of FIG. 2, the outermost insulating cylinder of the insulating inner container 7 is used as a winding mold, and the tap winding 10 is wound around the outer circumference of the winding mold. Then, the shield 12 for relaxing the electric field is provided at the upper and lower end portions of the wound tap winding 10.
The tap winding pressing member 11 which is an insulator is installed via the above to support the tap winding 10 in the axial direction.

Further, lead terminal pressing members 13 are installed on the outer peripheral portions of the upper and lower portions of the tap winding 10, respectively.

Further, a plurality of vertical wedge members 14 for cooling are arranged at equal intervals along the axial direction on the outer peripheral surface of the intermediate portion of the upper and lower lead terminal pressing members 13. The winding band 15 for tightening the outer circumference is tightened from the outer circumference of such a wound article to be firmly tightened.
Thus, the winding material such as the tap winding 10 is configured to have sufficient strength against transportation and short-circuit mechanical force.

The material of the wrapping band 15 is an insulating material such as sessure glass bind, pressboard polyester terephthalate or aramid fiber.

H. Effect of the Invention As described in detail above, according to the electric device with a cooler of the present invention, the winding of the internal device is housed in the insulating inner container, and the outermost insulating cylinder is wound to form the tap winding. Since the output terminal portion of the tap winding is supported by the output terminal pressing member and the outer peripheral wound material of the insulating inner container is wound and fastened with a wrapping band, insulation filled with insulating liquid is used. There is no need to provide a large number of through holes for tap lead-out terminals in the inner container, the reliability of the seal at that portion can be improved, and the insulation and cooling reliability of the device can be improved.

Further, it has an effect that the tap change transformer under load can be installed compactly with a simple structure as a whole, and an inexpensive product can be provided.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram showing an embodiment of an electric device with a cooling device of the present invention, and FIG. 2 is an enlarged schematic sectional view of the main part thereof.
FIG. 3 is an overall schematic configuration diagram showing an example of a conventional semi-pool type transformer. DESCRIPTION OF SYMBOLS 1 ... Tank, 7 ... Insulated container, 10 ... Tap winding, 11 ... Holding member, 13 ... Lead terminal holding member, 15 ... Wrapping band.

Claims (1)

[Scope of utility model registration request] 1. An insulating inner container for accommodating a winding of an internal device and filled with an insulating liquid, a tap winding in which the outermost insulating cylinder of the insulating inner container is wound as a winding form, and the tap winding of the tap winding. An electric device with a cooler, comprising: a lead-out terminal pressing member that supports the lead-out terminal portion; and a winding band that winds and fastens a winding material such as the tap winding and the lead-out terminal holding member.