JPS644200Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a mounting device for an electrode containing carbon as a main component (hereinafter referred to as a carbon electrode) used in a disconnector for a gas-insulated electrical device, an earthing switch, etc.

To explain the conventional mounting device, as shown in Figure 1, which shows the outline of the carbon electrode side of a switch, etc.
The tube contact 3 attached to the high voltage side fixed conductor 1 with bolts 2 is surrounded by a fixed shield 5 which is a fixed part fixed to the fixed conductor 1 with bolts 4. An electrode 6 is attached with a mounting bracket 7 and bolts 8. As shown in more detail in FIG. 2, the carbon electrode 6 has its peripheral portion 6a attached to a mounting bracket 7.
and the edge 5a of the fixed shield 5, and is attached by tightening the mounting bracket 7 to the fixed shield 5 with bolts 8. 1 in Figure 1
0 is a movable contact, and 9 is a movable shield.

To briefly describe the action, as shown in Figure 1,
Tulip contact 3 and movable contact 10
Electricity is applied by bringing the movable contact 10 into contact with the tube contact 3, and cutting is performed by separating the movable contact 10 from the tube contact 3. During the cutting operation, the arc generated between the tulip contact 3 and the movable contact 10 that are separated is transferred from the tulip contact 3 to the carbon electrode 6 to prevent damage to the tulip contact 3. , is the role of the carbon electrode 6.

As described above, in the conventional mounting device, the carbon electrode 6 is sandwiched and mounted between the fixed shield 5 and the mounting bracket 7, so depending on the machining accuracy of the mounting bracket 7 and the carbon electrode 6, 1) If the thickness of the carbon electrode 6 becomes too large, it will be damaged during tightening.

(2) If a gap is left, the fixed shield 5 and the mounting bracket 7 will be thermally destroyed due to heat generated by the arc.

(3) There were drawbacks such as gaps causing vibrations.

This idea was made in consideration of the above points, and the purpose was to provide a mounting device that does not have the above-mentioned drawbacks.It uses two mounting brackets to sandwich the periphery of the carbon electrode between them and attach it to the center. It is attached to a fixing part having a hole, and one of the two fittings has elasticity, and the hole of the fixing part is formed larger than the peripheral contour of the carbon electrode and is attached almost concentrically. It is characterized by

In the following, the invention will be explained with reference to the illustrated embodiments. As shown in FIG. 3, the edge 5b on the inner diameter side of the hole of the fixed shield 5, which is the fixed part, has a larger hole profile, such as the inner diameter, than the conventional one (larger than the outer diameter, for example, the profile of the carbon electrode 6). good),
An elastic mounting bracket 11 is provided between the carbon electrode 6 and the end portion 5b of the fixed shield 5 so that the elastic mounting bracket described later can be bent at the place where the carbon electrode 6 is sandwiched. The peripheral part 6a of the outer periphery of the electrode 6 is sandwiched between the mounting bracket 7 and the mounting bracket 11, and the mounting brackets 7, 11 are fixed with the bolts 8 passing through the shield 5.
The carbon electrode 6 is attached to the fixed shield 5 via the attachment fittings 7 and 11 by tightening the carbon electrode 6 to the fixed shield 5.

Since the mounting device of this invention is constructed as described above, the mounting bracket 11 has elasticity and the hole in the center of the fixed shield 5 is formed larger than the outer diameter of the carbon electrode 6. This acts as a spring and prevents excessive stress from being generated during tightening and when the carbon electrode expands due to temperature rise.
Further, by making the thickness of the carbon electrode attachment part, that is, the peripheral part, thicker than the part of the attachment fitting 7, and providing the attachment fitting 11 with a bending allowance, a structure without gaps can be achieved. With this structure, it is possible to obtain the following effects: (a) No damage occurs during tightening, (b) No thermal damage caused by arcing, and (c) Almost no vibration occurs. .

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the entire structure of the blade section using a conventional carbon electrode mounting device, Fig. 2 is a partial sectional view of the conventional mounting device, and Fig. 3 is an example of the carbon electrode mounting device of this invention. FIG. 3 is a partial cross-sectional view similar to FIG. 2 shown in FIG. 1... High voltage side fixed conductor, 2, 4... Volts,
3... Tulip contact, 5... Fixed part (fixed shield), 6... Carbon electrode, 7... Mounting bracket, 8... Bolt, 9... Movable side shield,
10...Movable contact, 11...Mounting bracket.

Claims (1)

[Scope of utility model registration request] Attach almost concentrically to a fixing part having a hole in the center with the periphery of a substantially flat electrode mainly composed of carbon and having a hole in the center sandwiched therebetween.2
one of the mounting brackets has elasticity, the hole of the fixing part is formed larger than the peripheral contour of the electrode, and the mounting brackets are mounted substantially concentrically. Carbon electrode mounting device.