FIELD: mining.
SUBSTANCE: device includes pump and hydraulic units, a relief channel for a hydraulic liquid with a closing valve. The pump and hydraulic units are made in the form of hollow bodies and connected. A hydraulic pump is installed into the pump unit, which is connected with an electric motor. The hydraulic unit comprises upper and lower chambers, a stem, onto which upper and lower pistons are placed. At the same time the relief channel is made in the side wall of the hydraulic unit body in the section between the lower and the upper chambers with the possibility of their connection. Besides, the stem is formed as hollow with a through channel inside of it for movement of the hydraulic liquid between the lower chamber and the cavity of the pump unit. The lower chamber is a reservoir for a hydraulic liquid. The device also comprises a seismic sensor and an electric contact switch.
EFFECT: increased reliability and durability of a device with reduction of its dimensions and weight.
1 dwg
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