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Column circuit and control method of a hydraulic support

A hydraulic support and column technology, which is applied in mine roof support, earth square drilling, mining equipment, etc., can solve the problems of reducing the cost performance of the column circuit, improve energy utilization, prevent sheet sides and roof fall, and increase initial support force Effect

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AI Technical Summary

Problems solved by technology

[0005] At present, some of the column circuits of the hydraulic support used at home and abroad can realize the pressurization of the column cylinder, and some can realize the energy recovery and reuse of the lowering column, but neither column circuit has both functions well, which reduces the cost of the column circuit. value for money

Method used

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  • Column circuit and control method of a hydraulic support

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0016] Such as figure 1 As shown, a column circuit of a hydraulic support, the connection relationship of each component is: the emulsion pump station 1 communicates with the low-pressure liquid return circuit 2 and the main liquid supply circuit 3 respectively, and the main liquid supply circuit 3 passes through the first two-position four-way Valve 4, the second two-position four-way valve 21 communicates with the A port of the booster cylinder 20, and the B port of the booster cylinder 20 communicates with the second liquid storage tank 11' through the second two-position four-way valve 21, and the booster cylinder Port C of 20 communicates with port A of the first two-position four-way valve 4 through the fourth one-way valve 19, and port D of the booster cylinder 20 communicates with the first two-way valve 4 through the third one-way val...

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Abstract

The invention provides a stand column circuit of a hydraulic support and a control method, and belongs to the technical field of hydraulic supports. The stand column circuit is characterized in that the circuit comprises a pressure cylinder, a second two-position four-way valve controls the pressure cylinder to realize continuous pressurization operation, and first two-position four-way valve controls the pressure cylinder to realize bidirectional pressurization between a main feed flow path and the rodless cavity of a stand column cylinder. On one hand, a high-pressure emulsion of the main feed flow path enters the rodless cavity of the stand column cylinder through the first two-position four-way valve, the second two-position four-way valve, and the pressure cylinder, and on the other hand, the high-pressure emulsion in the rodless cavity of the stand column cylinder enters the main feed flow path through the first two-position four-way valve, the second two-position four-way valve, and the pressure cylinder. The circuit is advantaged in that the pressure of the rodless cavity of the stand column cylinder is improved, and pressure energy of the rodless cavity of the stand column cylinder is realized to be recovered and reused.

Description

technical field [0001] The invention belongs to the technical field of hydraulic supports, and in particular relates to a column circuit and a control method of a hydraulic support. Background technique [0002] As the main safety support equipment in coal mining technology, hydraulic support is developing in the direction of large flow, high pressure and energy saving. At present, there are the following problems in the working process of the column of the hydraulic support of the fully mechanized mining face: [0003] (1) The distance from the high-pressure pump station of the fully mechanized mining face to the hydraulic support is 200m to 500m. The rated pressure of the high-pressure liquid supply line is 31.5MPa. Due to the large diameter of the pipeline, its pressure level is difficult to increase; Due to factors such as frame speed and simultaneous movement of multiple frames, it is difficult for the rodless cavity of the column cylinder to achieve a higher initial s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D23/16E21D23/26
CPCE21D23/16E21D23/26
Inventor 仉志强李永堂金坤善刘志奇
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