Resistance furnace with adjustable cooling rate

Abstract

A resistance furnace with an adjustable cooling rate is composed of a furnace body (1) and a furnace door (2), a hearth inlet of the furnace body (1) is connected with the furnace door (2), heating elements (4) are arranged in the furnace body (1), circulation fans (5) are arranged at the top of the furnace body (1), and a chimney (6) is arranged at the top of the furnace body (1). The resistance furnace is characterized in that an electromagnetic butterfly valve (7) is arranged at the bottom of a flue of the chimney (6), a separation outlet is arranged at the position, above the electromagnetic butterfly valve (7), of the flue and connected with a pipeline (8) of an induced draft fan (9); and a filter hood (10) is arranged at the top of the flue. The resistance furnace is convenient and easy to operate, automatic temperature rising control, automatic constant temperature control and automatic cooling control of the heat treatment resistance furnace are organically combined together through the additionally-arranged chimney and induced draft fan, the cooling speed is effectively controlled, and the quality of high heat treatment workpieces is greatly improved; and meanwhile the situation that waste gas directly enters the air and pollutes the air can be avoided well.

Description

technical field [0001] The invention relates to the technical field of high-temperature heat treatment furnaces, in particular to a resistance furnace with adjustable cooling rate. Background technique [0002] With the development of modern science and technology, the requirements for heat treatment performance of some product parts are becoming more and more stringent, especially for the control of cooling speed after heat treatment and tempering. In the past, the product parts were cooled by natural cooling of the furnace body after quenching and tempering, and the cooling speed was uncontrollable, especially the cooling speed of the multi-zone heating furnace body varied greatly; There are strict requirements on the cooling speed, and the cooling must be carried out at a certain speed. The existing heat treatment furnaces cannot meet this requirement; in addition, a large amount of high-temperature waste gas and hot gas will be generated during heating. In the past, the...

AI Technical Summary

Problems solved by technology

In the past, the product parts were cooled by natural cooling of the furnace body after quenching and tempering, and the cooling speed was uncontrollable, especially the cooling speed of the multi-zone heating furnace body varied greatly; There are strict requirements on the cooling speed, and the cooling must be carried out at a certain speed. The existing heat treatment furnaces cannot meet this requirement; in addition, a large amount of high-temperature waste gas and hot gas will be generated during heating.

In the past, these exhaust gases and hot gases were directly discharged into the atmosphere, which not only polluted the environment, but also was a great waste of resources.

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