SU1193751A1 - Thermovacuum chamber - Google Patents

Description

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Phi & 1 1 the invention relates to the manufacture of electrical products and can be used in thermal processing and impregnation of electrical insulation, for example, power transformers and reactors. The purpose of the invention is to reduce energy costs. Figure 1 shows the proposed camera in a vertical version; figure 2 - the same, in horizontal form. The chamber contains a hermetic case 1, made of metal and covered with a heat insulating layer, and a cover 2, forming an internal volume 3 of the chamber, which is connected to a vacuum system, an oil line and steam registers (the Camera in horizontal execution is not shown (Fig. 2 ) equipped with a trolley 4, onto which electrical products to be processed 5 are installed. In the vertical version, the product 5 is mounted on the bottom of the chamber. On the walls of the vertical chamber (Fig. 1) and on the rollout 4, the horizontal for the chamber Brackets 6 with grips for fixing removable sealed tanks 7 are fixed (Fig. 2). The tanks 7 can be made of any necessary configuration (oval, rectangular, etc.) and of various sizes and have fastening means with brackets and each The tanks 7 are used to change the effective volume of the chamber. The brackets 6 are necessary so that the tanks 7 do not float when they are laid and could not damage the products being processed. The tanks 7 can be evacuated to a residual internal pressure of 0.4-0, 0.6 bar. and sealed. The degree of vacuumization determines the metal intensity of the tank itself: the greater the vacuum, the harder the tank should be when it is 1.2 at atmospheric pressure, and the lower the vacuum, the more rigid the tank should be when it is in the evacuated chamber. The optimal internal residual pressure in the tank will be 0.5 bar, since when it is located outside the chamber and inside the evacuated chamber, its metal structure will be affected by the load from the external or internal pressure of 0.5 bar. The method of thermal vacuum treatment and impregnation of electrical products in the proposed chamber is as follows. When the keypad 2 is open, electrical products 5 are loaded into the chamber, which are placed on the bottom of the vertical chamber (Fig. 1), or on the trolley 4 in the horizontal chamber (Fig. 2) - which is outside the chamber. After placing the products, tanks 6 are installed on the brackets 6 of the chamber or trolley in such an amount as to occupy as large a part of the volume of the working chamber as possible. The position of the tanks is fixed. When the number of processed items changes, the number of tanks loaded also changes. Then the cart is inserted into the horizontal chamber, closed with pin 2, sealed the chamber, and the operating mode of the thermal vacuum treatment is turned on, the chamber is heated, vacuum, and filled with the impregnating liquid. When the working volume of the chamber is heated to 100-120 ° C, the tanks are heated together with the products. Reducing the heat energy consumption to heat this additional amount of material is achieved by the fact that the tanks are evacuated and sealed, i.e. The volume enclosed in them requires less energy for heating, it does not need to be evacuated and filled with an impregnating liquid.

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Claims (3)

1. THERMAL VACUUM CAMERA for heat treatment and electro-impregnation. technical products, containing a sealed enclosure with a device for changing the usable volume of the chamber, characterized in that, in order to reduce energy consumption, the device for changing the usable volume of the chamber is made in the form of a set of removable sealed tanks. 2. The camera according to claim 1, about l and chaga, with the fact that its walls have a bracket with grippers for fixing _: reservoirs. 3. The camera according to claim 1, characterized in that the tanks are mounted on a trolley. napreg ener10