Interlocking valve for hydraulic support

Abstract

The invention discloses an interlocking valve for a hydraulic support. The interlocking valve comprises a valve body, a first one-way valve string and a second one-way valve string are arranged in thevalve body, the first one-way valve string is provided with a first valve seat and a first end plug opposite to the first valve seat, a first liquid inlet and a first reflux inlet are formed in the first valve seat, a first valve element is arranged in the first valve seat, and a first return spring is arranged in a first accommodating cavity between the first valve element and the first end plug; and the structure of the second one-way valve string is similar to that of the first one-way valve string, the first accommodating cavity communicates with a second liquid inlet of the second one-way valve string through a first damping channel, and a second accommodating cavity of the second one-way valve string communicates with the first liquid inlet through a second damping channel. The interlocking valve for the hydraulic support is ingenious in structure and convenient to install, potential safety hazards caused by the fact that the hydraulic support performs two actions at the same time can be fully avoided, stability and safety in the coal mining process are guaranteed, life safety of operators is maintained, and economic benefits of coal mining are improved.

Description

technical field [0001] The invention relates to the technical field of control valves for coal mine hydraulic supports, in particular to an interlock valve for hydraulic supports. Background technique [0002] The various actions of the coal mine underground hydraulic support are controlled by the reversing valve group. The hydraulic support column and each jack can be controlled by the reversing valve group to act independently or simultaneously, but in some cases, when the hydraulic support performs two actions at the same time, there will be safety hazards. For example, when the frame is operated underground in a coal mine, the potential safety hazard of lowering and moving the frame at the same time is particularly serious. Therefore, there is an urgent need to design an interlock valve. When the reversing valve group is manipulated to realize a support movement, the other movement is synchronously locked through the interlock valve so that it is not controlled by the m...

AI Technical Summary

Problems solved by technology

The column of the hydraulic support and each jack can be controlled by the reversing valve group to act independently or at the same time, but in some cases, when the hydraulic support performs two actions at the same time, there will be safety hazards

For example, when the frame is operated underground in a coal mine, the potential safety hazards of lowering and moving the frame at the same time are particularly serious

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