Bell furnace hood fan control system

Abstract

The invention discloses a control system for a furnace cap fan of a bell type furnace. The control system comprises a motor control center (MCC) cabinet, a programmable logic controller (PLC) cabinet, a socket box, a cooling cap fan overload protection box and a heating cap fan overload protection box, wherein a socket is arranged in the socket box and comprises a socket power terminal and a socket control terminal, the MCC cabinet is connected with the PLC cabinet, the socket power terminal and the socket control terminal respectively, the cooling cap fan overload protection box is provided with a first plug, the heating cap fan overload protection box is provided with a second plug, and the first plug and the second plug can be inserted into the socket of the socket box. According to the control system for the furnace cap fan of the bell type furnace, an electrical control system is enabled to be simple in design, the utilization rate of electrical equipment is improved, the construction and maintenance are easy through reasonable allocation of resources, and the engineering cost is saved.

Description

technical field [0001] The invention relates to the heat treatment industry of cold-rolled strip steel in metallurgy, in particular to a fan control system for a bell-type furnace cover. Background technique [0002] In the process flow of the bell furnace, each hearth first uses a heating mantle to heat-treat the steel coil, and then uses a cooling mantle to cool the steel coil after a certain period of time. Fan, two cooling fans are arranged on the cooling cover and work simultaneously. [0003] At present, most low-voltage electrical control systems adopt conventional design methods, one motor corresponds to one power main circuit and one control circuit. If the conventional design method is used, there will be the following problems: First, it is necessary to set the power circuit and control circuit of the corresponding heating cover and cooling cover for each furnace base, and during use, the heating cover and cooling cover will not be on the same furnace base. The ...

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Problems solved by technology

If the conventional design method is used, there will be the following problems: First, it is necessary to set the power circuit and control circuit of the corresponding heating cover and cooling cover for each furnace base, and during use, the heating cover and cooling cover will not be on the same furnace base. The electrical equipment in the MCC (Motor Control Center, motor control center) cabinet is used at the same time, resulting in a low utilization rate of electrical equipment in the cabinet; second, the signal of each control loop needs to enter the PLC (Programmable logic Controller, programmable logic controller) system, which increases the difficulty of PLC system hardware investment and software programming; the third is the use of one-to-one power supply and control methods, resulting in a large number of cables, which are not easy to construct and maintain, and increase project costs

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