SU133137A1 - Induction muffle furnace - Google Patents

Description

Known electric induction furnaces designed for the treatment of products, having a cylindrical working heater of a second-class conductor and a starting heater of a first-class conductor.

The peculiarity of the furnace described here is that its muffles are made of an electrically conductive material and are arranged one inside the other sequentially in the direction of the propagation of electrical energy with gaps between the muffles in which the heated products are placed. The furnace of this design provides equal heating of products of simple and complex geometric shapes.

FIG. 1 shows a furnace with a single-layer muffle in the longitudinal section of the h; in fig. 2-furnace with a multilayer muffle in a longitudinal section; in fig. 3-oven with a fixed isnii movable muffle in the transverse and longitudinal cuts.

The main elements of the furnace according to the first embodiment of the nsiolnspn (Fig. 1) are; multi-turn induction heater /, ring heat insulation 2, razzzz.yy cylinder 3, single-layer muffle 4 in which heated products 5 are placed, internal heat insulation 6, made in the form of segments, frame 7 of the furnace, feed hopper 8, base of the feeding mechanism 9, furnace heat insulation 10, tray P for receiving the heated product and sprayer 12 for introducing a protective medium.

The furnace made according to the second variant (Fig. 2) contains the main elements: a multi-turn induction heater /, thermal insulation 2 for the muffle, the first muffle 13 and the second muffle 4, between which the heated products 5 are placed, under 14 pepp, loading hopper 8 chute / 5 for dispensing products, furnace frame 7 and anti-rifling mechanism 16.

The furnace with a movable or stationary muffle (Fig. 3) has a push-pull induction heater 1, thermal insulation 2 for protection of the muffle, a stationary muffle 17 and a movable muffle 18. In which no. 133137-2

Rum placed heated product 5, thermal insulation 6 for the movable muffle, furnace frame 7, hopper 8, feed frame 9, furnace thermal insulation 10, tray 11 for receiving the heated product and sprayer J2 for introducing a neutral medium.

Thus, the proposed furnace can be implemented in different ways.

In the design of the furnace, the conductor is a muffle, which can be made of various geometric shapes, m1, for example cylindrical, rectangular, etc. The material of the conductor for making the muffle is chosen depending on the required furnace temperature. For example, at temperatures up to 1150 carbon steel, nichrome and chromium cast iron, up to 1300 ° - an alloy of type EI-626, up to 2500 ° - based on molybdenum, tungsten or graphite, above this temperature - graphite and similar conductive heat-resistant materials. As a source of electromagnetic energy in the furnace using a multi-turn induction heater powered by alternating current.

Loading and unloading of heated products is carried out depending on their geometric shape and production conditions.

An induced electromagnetic energy heats a moving or stationary single-layer or multi-layer muffle and product. HarpeBaeiMbie Products move relative to a fixed single-layer or multi-layer muffle. By making a conductive material muffle, the temperature of the product can reach that of the muffle.

Subject invention

An induction muffle furnace with an external or internal inductor, characterized in that, for the purpose of uniform heating of the products, the muffles in it are made of electrically conductive material and are placed one in another sequentially in the direction of propagation of electromagnetic energy between the muffles, which are heated products.