A new type of single telescopic suspension single hydraulic prop based on the principle of leverage

Abstract

The invention discloses a novel single telescopic suspension type single hydraulic support column based on the lever principle. The novel single telescopic suspension type single hydraulic support column comprises a top cover, a suspension cover, a moveable column, a handlebar valve body, a cylinder, a high-pressure transmission and compression chamber, a power compression chamber, a return compression chamber, a stress transmission cylinder, a lever, a return spring, a base and a three-way valve, wherein the high-pressure transmission and compression chamber, the power compression chamber, the return compression chamber, the stress transmission cylinder, the lever together with other rod members and the like form a structure system for increasing support column working support pressure by virtue of pressure difference transmission and lever principle, and a support column can be also descended and shrunk and completely shrunk after being supported for a long time. Due to the design, the incidence rate that a single hydraulic support column is subjected to accidents such as column compression, column damage, or even cylinder exposure and the like as an overlying rock layer compresses suddenly can be reduced, the support level of the support column in a coal mine can be increased, and the security of a working environment can be improved.

Description

technical field [0001] The invention relates to the field of mine support equipment, and more specifically relates to a novel single telescopic suspension single hydraulic prop based on the principle of leverage. Background technique [0002] The single hydraulic prop is a single support equipment developed in the 1970s, which is mainly used in medium-thick coal seam and thin coal seam working faces. Because of its flexible and convenient use, it can be used not only for the roof support of the working face, but also for the end support and temporary support of the fully mechanized mining face. [0003] The single hydraulic prop is divided into a piston type single hydraulic prop and a suspended single hydraulic prop. The suspended single hydraulic prop is a new type of external injection single hydraulic prop, which is divided into two categories: single telescopic and double telescopic props. When the single telescopic suspension single hydraulic prop works, the pressure...

AI Technical Summary

Problems solved by technology

[0004] At present, the suspended single hydraulic prop widely used in production practice has more advantages than the piston single hydraulic prop, but there are also insufficient supporting force or sudden pressure from the top plate during use, causing it to appear pressure column, inverted column , dead column phenomenon, and may also cause cylinder explosion due to the slow discharge speed of the three-purpose valve. After a long period of support, the suspended single hydraulic prop still has problems such as that the column cannot be completely retracted when the column is unloaded and lowered.

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