Three-column-type hydraulic support, vertical column hydraulic system and electro-hydraulic control system of three-column-type hydraulic support

Abstract

The invention discloses a three-column-type hydraulic support, and belongs to the technical field of hydraulic supports. The three-column-type hydraulic support comprises a base which is connected with a supporting mechanism; the top of the supporting mechanism is connected with a top beam, a telescopic beam is hinged to the front end of the top beam, and a face guard is hinged to the telescopic beam; a shield beam is hinged to the rear end of the top beam, and the bottom of the shield beam is connected with the rear end of the base through an angle adjusting mechanism; and the supporting mechanism comprises three supporting vertical columns, and the three supporting vertical columns are arranged in a 'two-behind-one' isosceles triangle mode. The various problems of a traditional four-linkage hydraulic support can be solved, damage to a top plate can further be lowered, the adjusting processes of column ascending, supporting and column descending are simple, quick and accurate, the limited space of the base can also not be occupied, and smoothness of a mine is ensured.

Description

technical field [0001] The invention relates to the technical field of hydraulic supports, in particular to a three-column hydraulic support, a column hydraulic system and an electro-hydraulic control system thereof. Background technique [0002] my country is a country with abundant coal resources. Comprehensive mechanical coal mining is the trending method of coal mining today. Hydraulic support is an important support equipment for coal mining face. Therefore, the design and use of hydraulic support should be reasonable to ensure that the staff and various operations safety. Our country has a history of using hydraulic supports for more than 50 years. The hydraulic supports currently used are all improved and upgraded on the basis of four-bar linkages. The planar mechanism does not have the ability to resist the lateral component force, and cannot bear the lateral component force. However, the coal distribution in my country is wide and the coal seam conditions are complex...

AI Technical Summary

Problems solved by technology

Our country has a history of using hydraulic supports for more than 50 years. The hydraulic supports currently used are all improved and upgraded on the basis of four-bar linkages. The planar mechanism does not have the ability to resist the lateral component force, and cannot bear the lateral component force. However, the coal distribution in my country is wide and the coal seam conditions are complex and changeable. The pressure of the hydraulic support must have a lateral component, which will generate a large additional load, resulting in major safety accidents such as damage to the shield beam, collapse and slide

[0003] In order to solve the above problems, the Chinese patent literature discloses a patented technology with the authorization number CN 103899343A, which is a three-degree-of-freedom parallel hydraulic support. This patented technology uses a three-translation and three-degree-of-freedom parallel mechanism as the main support mechanism of the hydraulic support. The hydraulic support can achieve limited designated yielding movement and effective bearing relative to the top and bottom plates, but this hydraulic support adopts parallel support mechanism and rear parallel support mechanism as the support mechanism of the hydraulic support, that is, six hydraulic props are used to control the hydraulic support for posture adjustment , the six hydraulic columns not only bring greater pressure to the roof, resulting in a reduction in the service life of the roof, but also a cumbersome and slow adjustment process of the bracket, which cannot quickly and accurately adjust the lifting column, support and lowering column of the hydraulic support, and will also occupy the base of the base. The small space affects the smoothness of the mine tunnel and is not conducive to the passage of workers or machinery. Therefore, it is very necessary for the coal mining industry to develop a hydraulic support with high efficiency and precision adjustment that does not affect the smoothness of the mine tunnel.

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