Method used for controlling stepping beam of heating furnace and control system
A technology of control system and walking beam, applied in the direction of fluid pressure actuation system safety, fluid pressure actuation system components, fluid pressure actuation device, etc. Equipment damage and other problems, to achieve the effect of promoting production efficiency, reducing accidents, and reducing maintenance costs
Active Publication Date: 2015-04-15
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
However, when the position sensor fails, the controller cannot accurately obtain the position of the piston and cause an accident
For example, if the piston continues to move after exceeding the maximum stroke, it will cause damage to the hydraulic cylinder and oil circuit, affect the life of the hydraulic cylinder, and may also cause the walking beam to collide with surrounding equipment (such as a water seal tank) causing the walking beam and Damage to surrounding equipment
In addition, when the position sensor fails, it will not alarm, which will cause difficulties in troubleshooting and equipment maintenance
Method used
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Embodiment Construction
[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0026] figure 1 is a flowchart of a method for controlling a walking beam of a heating furnace according to an embodiment of the present invention, as figure 1 As shown, the walking beam is driven by the piston of the hydraulic cylinder, and the oil circuit connected to the hydraulic cylinder is provided with a solenoid valve for opening and closing the oil circuit and controlling the ratio of the liquid flow in the oil circuit valve, the hydraulic cylinder is provided with a position sensor for detecting the position of the piston, and the method includes the following steps:
[0027] Step 101, the signal processing module receives the position signal of the position sensor, limits the position signal, and sends the limited position signal to the controller;
[0028] Wherein, before...
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The invention relates to a method used for controlling a stepping beam of a heating furnace and a control system. The control system comprises a signal processing module and a controller, wherein the signal processing module is used for receiving a position signal of a position sensor, conducting amplitude limiting on the position signal, and sending the position signal where amplitude limiting is conducted to the controller, and the controller is used for receiving the position signal where amplitude limiting is conducted, judging whether the position sensor is abnormal or not, sending a signal to an electromagnetic valve to turn off the electromagnetic valve if the position sensor is abnormal and generating a control signal used for controlling the opening degree of a proportional valve according to the position signal where amplitude limiting is conducted, the signal processing module is used for conducting amplitude limiting on the control signal at the moment, and the controller is further used for sending the control signal where amplitude limiting is conducted to the proportional valve. The invention further discloses a method for controlling the stepping beam through the control system, the method and the system can be used for ensuring the system safety when the position sensor used for detecting a piston breaks down.
Description
technical field [0001] The invention relates to the field of automatic control, in particular to a method and a control system for controlling a walking beam of a heating furnace. Background technique [0002] In the production of the metallurgical industry, a heating furnace is usually used to heat the slab. A walking beam for transporting the slab in the heating furnace is installed in the heating furnace. The horizontal hydraulic cylinder and the vertical hydraulic cylinder respectively make the walking beam move Translational movement and lifting movement. Both the horizontal hydraulic cylinder and the vertical hydraulic cylinder are equipped with a piston for driving the walking beam. The piston is driven by the liquid supplied through the oil circuit connected to the hydraulic cylinder. A solenoid valve is set on the oil circuit to control the opening and closing of the oil circuit and the liquid The direction of the flow, so that the walking beam can move forward and...
Claims
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IPC IPC(8): F15B21/02
CPCF15B20/002F15B21/02
Inventor 王红沈大良
Owner BAOSHAN IRON & STEEL CO LTD