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Hydraulic Control Circuit of Top Distributor of Blast Furnace

A control loop and distributor technology, applied in the field of metallurgical machinery, can solve problems such as high cost, difficult control and maintenance, and complex loops, and achieve the effects of less synchronization error, improved reliability and safety, and improved fabric accuracy

Active Publication Date: 2017-03-29
CISDI ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its circuit is too complicated, the cost is high, and the control and maintenance are not easy

Method used

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  • Hydraulic Control Circuit of Top Distributor of Blast Furnace
  • Hydraulic Control Circuit of Top Distributor of Blast Furnace
  • Hydraulic Control Circuit of Top Distributor of Blast Furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1, such as figure 2 Shown:

[0025] 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 3.1 is connected to the external oil inlet pipeline through the first hydraulic control check valve 5.1, and the T port of the proportional valve 3.1 is connected to the external oil return Pipeline; the A port of the proportional valve is connected to the rodless chamber of the hydraulic cylinder 1.1 after passing through the second hydraulic control check valve 5.2; the B port of the proportional valve 3.1 is connected to the hydraulic cylinder 1.1 through the third hydraulic control check valve 5.3. Rod chamber; the pressure oil at the P port of the proportional valve 3.1 is connected to the proportional valve A port or B port after the proportional valve is reversed; after the controller receives the target command signal, it calculates and sends the propo...

Embodiment 2

[0038] Example 2, such as image 3 Shown:

[0039] There are three groups of separate closed-loop control circuits: the first group of separate closed-loop control circuits includes: the P port of the proportional valve I 2.1 is connected to the external oil inlet pipeline through the electromagnetic poppet valve 9.1, and the T port of the proportional valve I 2.1 is connected to the external oil return pipeline; Port A and port B of the proportional valve are connected to the rodless chamber and the rod chamber of the hydraulic cylinder 1.1 through the electromagnetic cut-off valve 13.1; the controller calculates the proportional valve control signal through the closed-loop control software after receiving the target command signal, so as to realize the control of the proportional valve. Reversing and valve opening control; through the control of the proportional valve, the dynamic supply and discharge of oil to the rodless chamber and the rod chamber of the hydraulic cylinde...

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PUM

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Abstract

The invention discloses a hydraulic control loop of a blast furnace top distributing gear, which comprises at least three tilting hydraulic cylinders, wherein each tilting hydraulic cylinder is provided with an independent closed control loop which is used for realizing the independent closed position control of the tilting hydraulic cylinder and the dynamic and static compensation control of a hydraulic cylinder position in the moving process of the blast furnace top distributing gear. The hydraulic control loop further comprises a switching loop which is used for realizing automatic switching between an independent closed control mode and a free synchronous control mode. The hydraulic control loop has the characteristics of high control precision, small synchro error, high reliability and high safety, meets the requirement of high-precision distribution at the top of a blast furnace, and meanwhile can switch to the free synchronous mode on the basis of eliminating a centralized control loop.

Description

technical field [0001] The invention belongs to the field of metallurgical machinery, and in particular relates to a hydraulic control circuit of a top distributor 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. The existing distributor either adopts a simple centralized hydraulic control method, that is, controls the actions of multiple hydraulic cylinders through a valve, and the hydraulic oil in multiple hydraulic cylinders can move in series with each other, or adopts a composite hydraulic control method, that is, through Three separate closed-loop control loops for controlling the hydraulic cylinders are used to realize the individual position closed-loop control of each hydraulic cylinder and the dynamic compensation control of the three hydraulic cylinde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/20
CPCC21B7/20
Inventor 吴卫李军刘勋柏峰
Owner CISDI ENG CO LTD