Cold air valve closing control circuit and hot air stove control system
A cold air valve and valve control technology, applied in furnaces, blast furnaces, heating furnaces, etc., can solve the problems of production and equipment safety hazards, the inability to control chain investment or not, and the inability to close the cold air valve of the hot blast furnace, etc.
Active Publication Date: 2021-12-10
BEIJING SHOUGANG AUTOMATION INFORMATION TECH
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Problems solved by technology
The first control method is pure manual control without interlocking, which will cause huge safety hazards to production and equipment safety.
The second control method is the chain control that cannot control whether the chain is turned on or not, that is to say, as long as the chain control is turned on, it cannot be closed
However, although the second control method can solve potential safety hazards, it cannot close all the cold air valves of the hot blast stove due to the input of chain control
Method used
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[0041] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art.
[0042] The first embodiment of the present invention provides a cold air valve closing control circuit, the circuit is used to close the cold air valve of a hot blast stove, and at the same time, the circuit is suitable for closing a plurality of cold air valves. The circuit will be described in detail below.
[0043] like figure 1 As shown, the cold air valve closing control circuit of the embodiment of the present invent...
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The invention relates to the technical field of automatic control, in particular to a cold air valve closing control circuit and a hot blast stove control system, which includes a plurality of valve closing control branches connected in parallel and powered by a power supply; each valve closing control branch includes a selection intermediate relay, a chain The control sub-circuit and the valve-closing output intermediate relay, the valve-closing output intermediate relay is used to control the closing coil of the hydraulic valve platform electromagnetic reversing valve of the cold air valve; by connecting the contact group of the selection intermediate relay in series with the valve-closing output intermediate relay, and connecting The chain control sub-circuit is connected to the contact group of the selection intermediate relay, forming the first control loop and the second control loop in the valve closing control branch; under the control of the air supply start command, the second control loop is turned on and the first When the first control loop is disconnected, the interlocking control function corresponding to the interlocking control subcircuit is turned on; under the control of the end command of the wind break, the first control loop is turned on and the second control loop is disconnected, and the interlocking control function corresponding to the interlocking control subcircuit Function is off.
Description
technical field [0001] The invention relates to the technical field of automatic control, in particular to a cold air valve closing control circuit and a hot blast stove control system. Background technique [0002] In the process of controlling multiple hot blast stove cold blast valves, there are two control methods. The first control method is pure manual control without interlocking, which will cause huge safety hazards to both production and equipment safety. The second control method is the chain control that cannot control whether the chain is turned on or not, that is, as long as the chain control is turned on, it cannot be turned off. However, although the second control method can solve the hidden safety hazard, it cannot close all the hot blast stove cold blast valves due to the input of interlocking control. SUMMARY OF THE INVENTION [0003] In view of the above problems, the present invention is proposed to provide a cold blast valve closing control circuit ...
Claims
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IPC IPC(8): C21B9/12C21B5/00
CPCC21B9/12C21B5/00
Inventor 孙涛施雪松王新华徐立勇董润胜李佳张丽娜
Owner BEIJING SHOUGANG AUTOMATION INFORMATION TECH