JPH0132338Y2 - - Google Patents

Description

[Detailed description of the invention] This invention has an iron core and a plurality of coil blocks wound around the core, and cools the cooling duct between the coil blocks by dropping or spraying an insulating cooling medium (for example, fluorocarbon). The present invention relates to a stationary induction device which is cooled by being brought into contact with the coil block by passing the coil through the coil block.

Such a conventional stationary induction device will be described with reference to FIG. 1, taking an evaporative cooling type gas insulated transformer as an example.

In Fig. 1, numeral 1 is a coil block wound into a flat plate, and by connecting these to each other, a primary winding and a secondary winding are formed, and numeral 2 is a solid insulator. , 3 are iron cores, which constitute the main body of the transformer. 4 is a tank that accommodates the transformer body; 5 is a tank containing vapor of an insulating liquid cooling medium 6 (hereinafter simply referred to as refrigerant liquid) and an insulating medium (for example, SF ₆ gas) that cools the coil block 1, iron core 3, and other heat generating parts; ) is sealed in the tank 4 to insulate the live parts of the transformer body. A pump 7 forcibly circulates the refrigerant liquid through a cooler 8. Reference numeral 9 denotes a dripping device for the refrigerant liquid 6, which drips the refrigerant liquid 6 sent from the lower part of the tank 4 by the pump 7 onto other heating parts such as the coil block 1 and the iron core 3; 10 is the dripping device; This is the dripping refrigerant liquid from 9. Note that 11 is a cooling duct formed between the coil blocks.

In the conventional system configured as above,
The refrigerant liquid 6 is delivered to the coil block 1 by the dropping device 9.
The refrigerant liquid 6 dripped onto the heat generating parts such as the solid insulator 2 and the iron core 3 passes through the cooling duct 11 formed between the coil blocks 1 and reaches the lower part of the transformer tank 4. Cooling by the refrigerant liquid 6 is carried out by contact between the heat generating part constituting the cooling duct 11 and the refrigerant liquid 6.

However, in conventional methods such as those mentioned above,
Since the cooling duct 11 is oriented vertically, there are few opportunities for contact between the refrigerant liquid 6 and the coil block 1 constituting the cooling duct 11, and in order to increase cooling efficiency, a large amount of refrigerant liquid 6 or a large pump 7
There was a drawback that it required such things.

In view of the above-mentioned drawbacks, this device tilts the coil block 1 from the normal vertical direction to increase the contact between the refrigerant liquid and the coil block 1, increasing the cooling efficiency, and using a small amount of refrigerant liquid and a small pump. The purpose of the present invention is to provide a stationary induction device that can be cooled.

This invention will be explained below with reference to the embodiment shown in FIG. In FIG. 2, numerals 3 to 10 are the same as those in FIG. 1, 2, and 11 are also the same as those in FIG. 1, but differ in that they are inclined with respect to the normal vertical direction. That is, in this embodiment, the coil block 1 and the solid insulator 2 are tilted to tilt the cooling duct 11 from the vertical direction.
A cooling duct 11 is formed by the upper surface of the coil block 1 in the vertical direction and the lower surface of the solid insulator 2, that is, the upper end of the cooling duct formed on the upper surface side of the coil block (coolant inlet side). Open it wide and connect the lower surface of the coil block 1 with the solid insulator 2.
The cooling duct 11 formed on the upper surface, that is, the upper end (inlet side) of the cooling duct formed on the lower surface side of the coil block is closed.

In the structure configured as described above, the refrigerant liquid 6 is dropped onto the coil block 1, the solid insulator 2, and the iron core 3 by the dripping device 9, and the refrigerant liquid 6 is dropped onto the coil block 1 and the solid insulator 2.
The coil block 1 passes through a cooling duct 11 which has an inclined structure with respect to the vertical direction and whose upper end is wide open on the upper surface side of the coil block 1, and removes heat from the coil block 1. In this case, the refrigerant liquid 6 is always connected to the coil block 1.
Since the contact area is very large, the cooling efficiency is significantly improved. In addition, in this invention, since the iron core 3 is held at the normal position and the coil block 1 is simply tilted, the support structure of the transformer body does not become complicated, and the practical effect is significant.

By the way, in the above explanation, the outer iron type of the evaporative cooling type gas insulated transformer that drips refrigerant liquid was used as an example, but it is also applicable to the evaporative cooling type gas insulated transformer that sprays the refrigerant liquid and stationary induction devices other than transformers, such as reactors, etc. Needless to say, it can be applied to a considerable portion of inner iron type structures.

As explained above, this device tilts the coil block 1 and the solid insulator 2 with respect to the vertical direction,
The upper end of the cooling duct formed on the upper surface of the coil block is wide open, and the upper end of the cooling duct formed on the lower surface of the coil block is closed to increase contact between the refrigerant liquid and the coil block. Therefore, it is possible to effectively cool the coil block, reduce the amount of refrigerant liquid used, and downsize the pump for circulating the refrigerant liquid.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional stationary induction device, and FIG. 2 is a sectional view showing an embodiment of this invention. In the figure, 1 is a coil block, 3 is an iron core,
6 is an insulating liquid cooling medium, and 11 is a cooling duct. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] It has an iron core, a plurality of flat coil blocks wound around the core, and a solid insulator provided between each plate coil block, and the coil blocks are cooled by dropping or spraying an insulating liquid cooling medium. In a stationary induction device in which the coil block and the solid insulator are cooled by passing through a cooling duct formed between the coil block and the solid insulator, the coil block and the solid insulator are arranged in a vertical direction. The stationary induction device is tilted so that the upper end of the cooling duct formed on the upper surface side of the coil block is wide open, and the upper end of the cooling duct formed on the lower surface side of the coil block is closed.