JPH0132730Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to stationary guidance equipment,
For example, it relates to stationary induction equipment in which refrigerant liquid is forcibly circulated and cooled by dropping or spraying it from above on heat generating parts such as windings and iron cores.

FIG. 1 is a side sectional view showing a conventional gas insulated transformer, which is a stationary induction device. In FIG. 1, a winding 1 is constructed by combining a plurality of coils wound into a flat plate shape. Reference numeral 2 denotes an iron core, which together with the windings constitutes the main part of the transformer body. 3 is a tank that stores the transformer main body such as the iron core 2, and 4 is an insulating medium (gas) sealed in the tank 3 to insulate the live parts of the transformer main body, such as SF ₆ gas and a cooling medium 5 to be described later. It is a gas mixture with steam. Reference numeral 5 denotes a liquid cooling medium such as fluorocarbon, which cools the coil 1, the iron core 2, the leads (not shown), and other heat generating parts. 6 is a cooler that cools the cooling medium 5; 7 is a pump that forcibly circulates the cooling medium 5 via the cooler 6. Reference numeral 8 denotes a dripping device for the cooling medium 5, which supplies the cooling medium 5 pumped up to the upper part of the transformer body by the pump 7 to heating parts such as the coil 1, the iron core 2, and the leads (not shown) as shown by reference numeral 5A. It is dripped or sprayed almost uniformly.

Figure 2 is a structural view of the upper end of the coil in Figure 1, where a is a front sectional view, b is a partial side view of a,
Figure c is a plan view of figure b. Figure 2 a, b,
In c, 9 is the upper surface of the coil 1 onto which the cooling medium 5 is dripped, 10 is the coil cooling duct, and the coil 1 is
It is made up of spacers 11 made of an insulator that are intermittently pasted on the side surfaces of the insulator, and an insulating plate (washer) 12 that is pasted through the spacers. 13 is the outer peripheral edge of the coil 1;
It is a channel-shaped insulator that is attached to the end face of the coil and insulates the outer peripheral edge of the coil.

In the conventional external iron type gas insulated transformer as described above, the cooling medium 5 dripped or sprayed onto the channel-shaped insulator 13 flows along the end face of the channel-shaped insulator 13 as indicated by the dotted arrow g. As shown in FIG. 2, it flows down from the periphery of the coil 1 to the lower part without flowing into the cooling duct 10 of the coil 1, and has the disadvantage that it does not work effectively for cooling. Therefore, it is necessary to circulate the cooling medium 5 in an amount larger than that truly required for cooling, which increases the size of auxiliary equipment such as the cooler 6 and the pump 7, resulting in an increase in loss of auxiliary equipment.

This invention was made to eliminate the drawbacks of the conventional ones as described above, and by effectively directing the cooling medium 5 to the coil cooling duct 10, it improves the cooling characteristics of the transformer and also improves the cooling characteristics of the auxiliary equipment. The objective is to provide a compact and highly efficient stationary guidance device by downsizing the system and reducing loss of auxiliary equipment.

An embodiment of this invention will be described below with reference to the drawings. Fig. 3 is a structural diagram of the upper end of a coil showing an embodiment of the external iron type gas insulated transformer which is a stationary induction device of this invention; The side view (c) is a plan view of (b). In the figures, parts corresponding to FIGS. 1 and 2 a to c are designated by the same reference numerals. In FIGS. 3a to 3c, reference numeral 14 denotes a guide that is intermittently attached to the outer peripheral end face of the channel-shaped insulator 13 in order to guide the coolant 5 that has been dropped or sprayed onto the side surface of the coil 1.

This guide 14 is cut into a rectangular shape and is pasted on the outer peripheral end surface of the channel-like insulator 13 at the same pitch as the spacers 11 that are intermittently pasted on the side surface of the channel-like insulator 13. When it is dropped or sprayed on the upper end surface of the coil 1, it flows as indicated by the dotted arrow h, is received by the end surface of the guide 14, and then efficiently flows in the side direction of the coil 1 along the end surface of the guide 14.

This invention is constructed as described above, and the guide is intermittently attached to the outer peripheral end face of the channel-shaped insulator attached to the upper end of the coil, so that the cooling medium flows into the coil cooling duct without wasting it. This has various effects such as effectively cooling the coil, reducing the amount of circulating coolant, and therefore making it possible to downsize the pump that circulates the coolant and reducing loss of auxiliary equipment.

[Brief explanation of the drawing]

Figure 1 is a side sectional view showing a conventional static induction device, an external iron type gas insulated transformer, and Figure 2 is a structural diagram of the upper end of the coil in Figure 1. Figure a is a front sectional view, and figure b is 3 is a partial side view of FIG. FIG. 5A is a front sectional view, FIG. 1B is a partial side view of FIG. 1A, and FIG. In the figure, 1 is a coil, 2 is an iron core, 3 is a tank, 4 is an insulating medium, 5, 5A is a cooling medium, 6 is a cooler, 7 is a pump, 8 is a dripping device, 9 is the top surface of a coil, 10 is a coil A cooling duct, 11 a spacer, 12 a washer, 13 a channel-shaped insulator, and 14 a guide. Note that the same or corresponding parts in the figures are given the same reference numerals.

Claims (1)

[Scope of utility model registration request] In a device that includes a winding housed in a tank and a dripping device that drips or sprays a cooling medium onto the winding from above to cool the winding, the winding includes a flat coil and a coil outside the coil. It has a channel-shaped insulator attached to the outer edge end surface of the insulator, and a guide intermittently attached to the outer edge edge edge surface of the insulator above the coil. A stationary induction device characterized in that a cooling medium is guided to a side surface of the coil by the guide.