SUPPORTING HYDRAULIC STAND Russian patent published in 2010 - IPC E21D15/44 

FIELD: mining.

SUBSTANCE: invention is related to mining, namely to supporting hydraulic stands. Supporting hydraulic stand comprises upper cover and movable support arranged in hydraulic cylinder. Sealing cover is arranged in movable support. Between window of hydraulic cylinder and movable support there is body of manipulation valve arranged. Return spring is connected to sealing cover. In movable support there is opening provided for oil inlet. In body of manipulation valve there is three-way valve arranged. Between body of manipulation valve and movable support and hydraulic cylinder there is dust protective ring, sealing rings and connecting metal wire arranged. In order to provide for communication between hydraulic cylinder and three-way valve there is opening for oil inlet. Between lower seat of cylinder and hydraulic cylinder itself there is sealing ring installed, as well as connecting metal wire. Below sealing cover in movable support there is gasket arranged, where several through holes are provided, external circular surface of insert joins collar arranged from the side of internal diametre of movable support. On the side of its external diametre, movable support is equipped with metal wire for position limitation and stabilising ring, which are installed in slot provided in movable support from the side of its external diametre. Between body of manipulation valve and movable support there is stabilising ring arranged. In radial direction of external cylindrical part of sealing cover there is through hole arranged, matched with well in upper cover and movable support, this holes locates elastic cylindrical rod.

EFFECT: compact and rational design of hydraulic stand, good stability, high strength, high bearing capacity, proper tightness, good corrosion resistance, durable service life.

4 cl, 4 dwg