Temperature control system of electric smelting furnace
A temperature control system and electric melting technology, applied in the direction of furnace control device, electric furnace heating, furnace, etc., can solve problems such as heater out of control, adhesion, contact aging, etc., and achieve the effects of cost saving, fast response and increased stability
Inactive Publication Date: 2017-05-10
SHANDONG IRON & STEEL CO LTD
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- Description
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- Application Information
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Problems solved by technology
Frequent switching of the mechanical heating switch leads to overheating, aging and ablation of the contacts, which are prone to poor contact and adhesion, resulting in loss of control of the heater, damage to accessories or scrapping of the electric melting furnace
Method used
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Embodiment Construction
[0011] Such as figure 1 As shown in Fig. 1, before the electric melting furnace line transformation, the static contact of the first furnace door switch is connected to the upper electric heating wire, the moving contact of the first furnace door switch is connected to the power supply to form a heating circuit, and the second furnace door switch The static contact is connected to the electric heating wire of the lower layer, and the moving contact of the second furnace door switch is connected to the mains power supply to form a heating circuit. When the furnace door is closed, the furnace door switch is closed and the circuit is turned on. The door switch is disconnected, the line is disconnected, and heating is stopped. The thermocouple detects the mold temperature between the upper heating wire and the lower heating wire. The main control module detects the mold temperature. When the temperature is higher than the set temperature, the furnace door switch is controlled to st...
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The invention discloses a temperature control system of an electric smelting furnace. The temperature control system comprises a furnace door switch, a solid-state relay, heating wires and a thermoelectric couple. A static contact of the furnace door switch is connected with one input control end of the solid-state relay, and a movable contact of the furnace door switch is connected with the other input control end of the solid-state relay. The movable contact and the static contact of the furnace door switch are connected when a furnace door is closed and disconnected when the furnace door is opened. One output end of the solid-state relay is connected with a mains supply, and the other output end of the solid-state relay is connected with the heating wires. A temperature detection unit of the thermoelectric couple detects the temperature of a heating unit where the heating wires are located, and the output end of the thermoelectric couple is connected with a main control module of the electric smelting furnace. Through circuit improvement, the mechanical heating furnace door switch which originally needs to be replaced every one to two months can operate stably for a long time, cost is reduced, and the working stability of the system is improved.
Description
technical field [0001] The invention belongs to the field of inspection and testing equipment control, and relates to a temperature control system of an electric melting furnace. Background technique [0002] The traditional electric melting furnace is controlled by a microcomputer system to control the temperature program, and complete the processes of heating and cooling, sample entry and exit, and sample shaking and stirring. The mechanical heating door switch is the node with the largest current of the electric melting furnace heater, and it is also the most critical component. It is controlled by two sets of contacts to control the upper and lower heaters. Its components include moving contacts, static contacts, pressure springs, and reaction springs. Frequent switching of the mechanical heating switch leads to overheating, aging and ablation of the contacts, which are prone to poor contact and adhesion, resulting in loss of control of the heater, damage to accessories...
Claims
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IPC IPC(8): F27D19/00F27D11/02F27D1/18
CPCF27D19/00F27D1/1858F27D11/02F27D2019/0003F27D2019/0084
Inventor 李新起蒋薇甄洪香刘晓峰初珍珠刘伟
Owner SHANDONG IRON & STEEL CO LTD