E - Fixed Constructions – 21 – C
Patent
E - Fixed Constructions
21
C
262/68
E21C 25/60 (2006.01) E21B 7/18 (2006.01)
Patent
CA 1050572
Abstract of the Disclosure The herein proposed device is intended for building up high pulse liquid pressures. It may find suitable application in mining industry and can be advantageously used in construc- tions of hydro-power installations. The device comprises a cylinder accommodating a two-step piston having an accelera- ting actuator. The piston step of smaller diameter is posi- tioned, during the piston stroke, within a high-pressure cham- ber communicating with a liquid supply source and fitted with an opening for the liquid discharge. The piston step of smal- ler diameter is provided with a rod having a widening at the free end thereof, while the high-pressure chamber has a con- stricted portion passing into a widening towards the opening for the liquid discharge. At the initial stage of the piston stroke, the widening of the rod overlaps the constricted por- tion of the chamber to lock the liquid within the chamber bet ween the constricted portion thereof and the piston step of smaller diameter, whereby high pressure of this particular liquid is built up. As the piston continuous to move in the space between the rod and the widenings of the high-pressure chamber, a channel with an annular cross-section is formed. This channel serves to communicate the high-pressure chamber with the opening for the liquid discharge. The proposed devi- ce makes it possible to substantially increase the jet force of the discharged liquid and enhance the factor of utiliza- tion of energy derived from the piston acceleration.
266756
Lyatkher Viktor M.
Militeev Alexandr N.
Nikolaev Valentin P.
Shkolnikov Sergei Y.
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