Composite hydraulic control system of blast-furnace top distributing device
A technology of hydraulic control system and distributor, which is applied in the direction of blast furnace, blast furnace details, furnace, etc., can solve the problems of distributor jamming, aggravating the impact and wear of guide wheels and guide rails, and increasing manufacturing costs, so as to reduce impact and wear , Reduce synchronization error, improve cloth accuracy
Active Publication Date: 2013-04-17
CISDI ENG CO LTD
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Problems solved by technology
In this control mode, the control accuracy of the distributor mainly depends on the size of the gap between the guide wheel installed on the support ring and the guide rail installed on the shell. The gap between the guide rail and the guide wheel is small. In fact, this method is difficult to ensure the accuracy of the cloth. Because the gap between the guide rail and the guide wheel is reduced, it will increase the difficulty of machining and assembly, and increase the manufacturing cost. At the same time, under high temperature conditions It is also easy to cause the distributor to be stuck
In addition, due to the eccentric load of the lower part of the distributor, the support ring of the distributor driven by the hydraulic cylinder is always in a state of alternating force, which intensifies the impact and wear between the guide wheel and the guide rail
Method used
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[0017] The specific implementation of the present invention will be further described below in conjunction with accompanying drawing:
[0018] Such as figure 2 Shown:
[0019] The separate closed-loop control loops are divided into three groups: the first set of separate closed-loop control loops includes: the P port of the proportional valve 1-1 is connected to the external oil inlet pipeline through the first hydraulic control check valve 3-1, and the T port of the proportional valve 1-1 Port A of the proportional valve is connected to the rodless cavity of the hydraulic cylinder 7-1 through the internal oil passage of the integrated block after passing through the second hydraulic control check valve 3-2; port B of the proportional valve 1-1 The port passes through the third hydraulic control check valve 3-3 and then connects to the rod cavity of the hydraulic cylinder 7-1 through the internal oil passage of the integrated block; the pressure oil at the P port of the prop...
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A combined type hydraulic control system for a top distributing gear of a blast furnace includes: a separate closed loop control circuit, which is used for controlling each hydraulic cylinder and realizing separate position closed loop control of each hydraulic cylinder and position dynamic compensation control of three hydraulic cylinders during movement of the distributing gear; at least one centralized control circuit, which is used for controlling three hydraulic cylinders when the separate closed loop control circuit is not in a proper running state; and at least one switching circuit, which is used for realizing automatic switch between the separate closed loop control circuit and the centralized control circuit. The invention can not only increase the stop accuracy of an oil cylinder of the distributing gear, but also ensure synchronization of the oil cylinders during angular transformation of the distributing gear, thus increasing distribution accuracy of the blast furnace, and enhancing the reliability and safety of the whole control system by the combined control.
Description
technical field [0001] The invention belongs to the technical field of metallurgical machinery, and discloses a composite hydraulic control system for a top distributor of a blast furnace, which is used for controlling the material distribution process of a bellless top of a blast furnace. Background technique [0002] The control of the blast furnace roof distributor is a key link in the blast furnace distribution system, and its control accuracy directly affects the distribution accuracy of the blast furnace distribution system. Most of the existing distributors adopt a simple centralized hydraulic control method, that is, one valve controls the actions of three hydraulic cylinders, and the hydraulic oil in the three hydraulic cylinders can move in series with each other. In this control mode, the control accuracy of the distributor mainly depends on the size of the gap between the guide wheel installed on the support ring and the guide rail installed on the shell. The ga...
Claims
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IPC IPC(8): F15B11/16C21B7/18
CPCF27B1/10C21B7/20C21B5/006
Inventor 刘勋吴卫李军丁常红赵渭康郑军王劲松
Owner CISDI ENG CO LTD