Long belt control system of refining furnace

Abstract

The utility model discloses a refining furnace long belt control system, which comprises a programmable logic controller (PLC), a frequency converter, an asynchronous motor and a human-computer interface, the frequency converter is electrically connected onto the PLC, the asynchronous motor is electrically connected onto the frequency converter, and the human-computer interface is electrically connected onto the PLC. The utility model relates to the field of design and use of refining furnaces, in particular to a long belt control system of a refining furnace.

Description

Technical Field

[0001] The utility model relates to the field of refining furnace design and use, in particular to a long belt control system for a refining furnace. Background Art

[0002] A refining furnace is a type of smelting equipment in the hot working industry, mostly used for final deoxidation and alloying of molten steel in ferrous metallurgy. There are different types of refining furnaces depending on the purpose of the smelting process, with common types including reverberatory furnaces, rotary furnaces, and tilting furnaces.

[0003] The reverberatory furnace is a traditional fire refining equipment. It is a surface-heated chamber furnace with a simple structure and easy operation. It can process both cold and hot materials and burn solid, liquid, or gaseous fuels. The reverberatory furnace has a wide range of volume and size, and can process capacities from 1 ton to 400 tons, making it highly adaptable.

[0004] The rotary furnace is a cylindrical furnace body equipped with two to four air ducts, a furnace port, and a copper outlet. It can rotate 360°. The tuyere is buried below the liquid surface by rotating the furnace body to perform oxidation and reduction operations. The rotary furnace body can be used for charging, slag discharge, and copper tapping, making it easy and flexible to operate.

[0005] The tilting furnace is designed based on the reverberatory furnace and rotary furnace, drawing on the strengths of both. Its furnace chamber is shaped like a reverberatory furnace, maintaining a large heat exchange area. It adopts the rotary design of a rotary furnace, adds fixed tuyere, eliminates the need for duct insertion and slag removal, and reduces labor intensity. It can handle both hot and cold materials, making it an ideal furnace. The capacity of the tilting furnace ranges from 55 to 350 tons. Although the tilting furnace is a combination of the rotary and reverberatory furnaces, it is a perfect combination.

[0006] When the refining furnace is in use, the long belt is driven by two motors controlled by a contactor. It has only thermal relay protection, which can easily burn out the motors. Moreover, it is difficult to detect a burned-out motor, which can easily cause the accident to expand and affect production. In severe cases, it may also cause continuous casting to be interrupted. Utility Model Content

[0007] The technical problem to be solved by the utility model is that the motor is easily burned out if there is only thermal relay protection, and it is difficult to find that one motor is burned out, which can easily cause the accident to expand and greatly affect production. In severe cases, it may also cause continuous casting to be interrupted.

[0008] To solve the above problems, the technical solution adopted by the present invention is as follows: The present invention is a long belt control system for a refining furnace, comprising a PLC controller, a frequency converter, an asynchronous motor and a human-machine interface, the frequency converter being electrically connected to the PLC controller, the asynchronous motor being electrically connected to the frequency converter, and the human-machine interface being electrically connected to the PLC controller.

[0009] Furthermore, the human-machine interface is provided with a forward run button, the human-machine interface is provided with a forward jog button, the human-machine interface is provided with a fault reset button, the human-machine interface is provided with a first multi-speed instruction button, and the human-machine interface is provided with a second multi-speed instruction button.

[0010] Furthermore, the human-machine interface is provided with alarm display content.

[0011] The beneficial effects achieved by the utility model using the above structure are as follows: the long belt of the refining furnace is changed from contactor control to inverter control, and the inverter alarm signal and reset signal are connected to the PLC and then transmitted back to the human-machine interface to display the alarm, and various function buttons are made, which can also timely detect changes in the motor status and reduce the occurrence of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the overall structural module diagram of the refining furnace long belt control system proposed by the utility model;

[0013] Figure 2 This is a module diagram of the main buttons of the human-machine interface of the refining furnace long belt control system proposed by the utility model;

[0014] Figure 3 This is a module diagram of the alarm display of the human-machine interface of the refining furnace long belt control system proposed by the utility model;

[0015] Figure 4 This is the wiring diagram of the frequency converter and asynchronous motor of the refining furnace long belt control system proposed by the utility model.

[0016] Among them, 1. PLC controller, 2. Frequency converter, 3. Asynchronous motor, 4. Human-machine interface, 5. Forward operation, 6. Forward jog, 7. Fault reset, 8. First multi-speed command, 9. Second multi-speed command, 10. Alarm display. DETAILED DESCRIPTION

[0017] As the instruction manual Figure 1 As shown, the utility model is a refining furnace long belt control system, including a PLC controller 1, a frequency converter 2, an asynchronous motor 3 and a human-machine interface 4. The frequency converter 2 is electrically connected to the PLC controller 1, the asynchronous motor 3 is electrically connected to the frequency converter 2, and the human-machine interface 4 is electrically connected to the PLC controller 1.

[0018] As the instruction manual Figure 2 As shown, the human-machine interface 4 is provided with a forward run 5 button, the human-machine interface 4 is provided with a forward jog 6 button, the human-machine interface 4 is provided with a fault reset 7 button, the human-machine interface 4 is provided with a first multi-stage speed instruction 8 button, and the human-machine interface 4 is provided with a second multi-stage speed instruction 9 button.

[0019] As the instruction manual Figure 3 As shown, the human-machine interface 4 is provided with an alarm display 10 content.

[0020] As the instruction manual Figure 4 As shown in the figure, this is the connection diagram of the inverter 2, asynchronous motor 3 and its peripheral auxiliary components in the connected state of this design.

[0021] When used specifically: the frequency converter 2 is used to directly control the asynchronous motor 3, so that changes in the state of the asynchronous motor 3 can be discovered in a timely manner. The human-machine interface 4 can conveniently control and use the PLC controller 1, and there is an alarm display 10.

[0022] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. Refining furnace long belt control system, characterized by: The system comprises a PLC controller, a frequency converter, an asynchronous motor and a human-machine interface. The frequency converter is electrically connected to the PLC controller, the asynchronous motor is electrically connected to the frequency converter, and the human-machine interface is electrically connected to the PLC controller.

2. The refining furnace long belt control system according to claim 1, characterized in that: The human-machine interface is provided with a forward run button, the human-machine interface is provided with a forward jog button, the human-machine interface is provided with a fault reset button, the human-machine interface is provided with a first multi-speed instruction button, and the human-machine interface is provided with a second multi-speed instruction button.

3. The refining furnace long belt control system according to claim 2, characterized in that: The human-machine interface is provided with alarm display content.

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