Thermoelectric furnace provided with temperature control system

A temperature control system and thermoelectric technology, applied in lighting and heating equipment, etc., can solve the problems of short life of AC contactors, low control accuracy, poor measurement accuracy, etc., and achieve low operating costs, accurate temperature control, and uniform temperature and composition. the effect of

Inactive Publication Date: 2014-02-12
ANHUI IND & TRADE VOCATIONAL TECHN COLLEGE
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Problems solved by technology

Therefore, the capacity of the power supply grid is required to be 80 to 100 times the rated capacity of the electric arc furnace; if this requirement cannot be met, expensive dynamic compensation equipment must be equipped
In addition, these electric arc furnaces generate high noise during operation, and the electric arc furnace must be equipped with anti-noise equipment, and the operator must have anti-noise protection measures
[0004] At present, thermoelectric furnaces usually use analog instruments to measure temperature, and control the heating power by controlling the on-off time ratio of the AC contactor. Due to the poor measurement accuracy of the analog instrument itself, and the short life of the AC contactor, the on-off ratio is low. Therefore, the control precision is low

Method used

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  • Thermoelectric furnace provided with temperature control system

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Effect test

Embodiment 1

[0016] Such as figure 1 and figure 2 As shown, a thermoelectric furnace with a temperature control system includes a furnace body and a power supply device. The furnace body is composed of a furnace hearth 5, a furnace bottom 6 and a furnace cover 8. The power supply device includes a transformer 1, a rectifier 2, and a short network System 3 and a power supply electrode, the power supply electrode is composed of a cathode 4 and an anode 7, the cathode 4 is arranged on the furnace cover 8, the anode 7 is arranged on the furnace bottom 6, and the thermoelectric furnace is also provided with a temperature control system , the temperature control system includes a PLC host and a programmable controller connected to it, the signal output of the programmable controller is connected to the signal input of the solid state relay, and the signal output of the solid state relay is connected to the thermal The hearth 5 of the electric furnace is connected, the temperature sensing line ...

Embodiment 2

[0020] On the basis of Embodiment 1, in order to realize remote monitoring, a communication module is added, that is, the signal output end of the PLC host is connected to the signal input end of the communication module.

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Abstract

The invention discloses a thermoelectric furnace provided with a temperature control system. The thermoelectric furnace comprises a furnace body, a power unit and the temperature control system, wherein the furnace body consists of a combustion chamber, a furnace bottom and a furnace cover; and the power unit comprises a transformer, a rectifier, a short net system and power supply electrodes, the power supply electrodes consist of the negative electrode and the positive electrode, the negative electrode is arranged on the furnace cover, and the positive electrode is arranged at the furnace bottom. According to the thermoelectric furnace, smelted metal is located inside the combustion chamber between the negative electrode and the positive electrode, the metal is smelted by direct-current arcs produced between the negative electrode and the positive electrode, and strong electromagnetic stirring is formed in the molten liquid metal, so that the temperature and the composition of a metal solution are uniform. According to the thermoelectric furnace, a programmable controller is used, so that automatic control of the temperature of the thermoelectric furnace can be realized, the temperature control is accurate, and the operation cost of the whole system is low.

Description

technical field [0001] The invention belongs to the technical field of mechatronics, and relates to a thermoelectric furnace, in particular to a thermoelectric furnace with a temperature control system. Background technique [0002] The thermoelectric furnace is one of the commonly used equipment for heat treatment. The thermoelectric furnace can provide a temperature field ranging from room temperature to 1200 °C. Maintaining a constant temperature in a certain range of the thermoelectric furnace is a problem that must be solved. [0003] A common form of the traditional DC electric arc furnace is the double-electrode DC electric arc furnace, which arranges two electrodes on the furnace cover of the electric arc furnace at the same time, one of which is an anode and the other is a cathode. In practice, the arc generated by this scheme is from the cathode to the molten steel surface and then to the anode, which does not have a good stirring effect on the molten steel. With...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B3/10F27B3/28
Inventor 陶钧
Owner ANHUI IND & TRADE VOCATIONAL TECHN COLLEGE
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