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Adjusting method of material flow adjusting valve on furnace top

The technology of a material flow regulating valve and a regulating method, which is applied in the blast furnace field of the iron and steel industry, can solve the problems of abnormal shutdown of the main belt, insensitive action of the material flow regulating valve, long feeding time, etc., so as to prevent the feeding time being too long or too short, Improved motion sensitivity and stability, increased accuracy and effectiveness

Inactive Publication Date: 2015-03-18
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Driven by the hydraulic inertia of the hydraulic oil circuit and hydraulic equipment, it is easy to cause a large deviation between the actual opening of the material flow regulating valve and the set opening, and this deviation will be further aggravated by the temperature and pressure changes of the hydraulic system. Possibly, especially when there are impurities in the oil circuit or the valve core, this situation is more prominent, which directly leads to the insensitivity of the material flow regulating valve and the phenomenon that the material distribution time is too long or too short
This phenomenon will lead to the deviation of the blast furnace material distribution, abnormal top temperature and abnormal furnace conditions, and the abnormal shutdown of the main belt caused by the long time of material distribution due to the unprepared furnace roof, which will seriously affect the blast furnace material distribution and upper adjustment.

Method used

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  • Adjusting method of material flow adjusting valve on furnace top
  • Adjusting method of material flow adjusting valve on furnace top
  • Adjusting method of material flow adjusting valve on furnace top

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The adjustment method of the furnace top material flow control valve of the present invention involves parameters as follows:

[0027] (1) Each action represents the whole process of the material flow regulating valve from the beginning to the end of the movement;

[0028] (2) Setting opening = the opening angle of the material flow regulating valve in each action calculated by manual setting or PLC according to the working conditions;

[0029] (3) The actual opening is the real-time opening value of the material flow regulating valve returned by the encoder;

[0030] (4) Target travel =∣set opening—actual opening∣;

[0031] (5) Inertia is the continuous action of the material flow regulating valve after the action command is cleared;

[0032] (6) Inertial stroke is the stroke generated by inertial action;

[0033] (7) Inertia amount (or advance amount) = PLC collects the inertia stroke of the material flow regulating valve after each action and automatically adjusts...

Embodiment 2

[0047] This embodiment is basically the same as Embodiment 1, except that: in the second step: during the forced valve opening stroke stage, the starting current value of the driving hydraulic proportional servo valve opening action coil is 0.8A; in the minimum operating current maintenance stage, the hydraulic pressure The minimum operating current setting of the proportional servo valve opening action coil is kept at 0.15A.

[0048] 4 seconds after the PLC sends an instruction to stop the action of the material flow regulating valve, the PLC corrects and adjusts the inertia of the material flow regulating valve.

Embodiment 3

[0050] This embodiment is basically the same as Embodiment 1, except that: in the second step: during the forced valve opening stroke stage, the starting current value of the driving hydraulic proportional servo valve opening action coil is 0.7A; in the minimum operating current maintenance stage, the hydraulic pressure The minimum operating current setting of the proportional servo valve opening action coil is kept at 0.25A.

[0051] 5 seconds after the PLC sends an instruction to stop the action of the material flow regulating valve, the PLC corrects and adjusts the inertia of the material flow regulating valve.

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Abstract

The invention discloses an adjusting method of a material flow adjusting valve on a furnace top. The adjusting method comprises the following steps: step 1, setting set opening, namely manually setting or working out the opening angle of the material flow adjusting valve in each action by using an PLC (Programmable Logic Controller) according to working conditions; step 2, carrying out driving control, namely controlling the opening and closing speeds of the material flow adjusting valve in each action in real time, so that the final real opening of the material flow adjusting valve is identical to the set opening; and step 3, carrying out inertia moment adjustment, namely after the action of the material flow adjusting valve is ended each time, automatically correcting and adjusting the inertia moment of the material flow adjusting valve by using the PLC. The adjusting method can be used for overcoming the influence of the inertia of a hydraulic oil line and hydraulic equipment on the opening and closing precision of the material flow adjusting valve and can be widely applied to the technical field of blast furnaces in iron and steel industries.

Description

technical field [0001] The invention relates to the technical field of blast furnaces in the iron and steel industry, in particular to a method for adjusting a furnace top material flow regulating valve. Background technique [0002] In the blast furnace production process, the opening control of the material flow regulating valve is very important. Only when the actual opening control is accurate enough can the material distribution flow of the unloading gate be effectively controlled, so that the furnace material can be controlled according to the angular position and portion set by the material distribution matrix. The number and time of material distribution are accurately distributed to the furnace material surface, so that the top material distribution and upper part adjustment can be realized accurately and efficiently, and the stable operation of blast furnace production can be ensured. [0003] Such as figure 1 As shown, the blast furnace top material flow regulati...

Claims

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Application Information

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IPC IPC(8): C21B5/00
Inventor 刘嘉廖红军罗治平余少华丰宇雷巍陈长鑫刘曜杜春燕
Owner 武汉钢铁有限公司