SU529289A1 - Hydraulic hammer - Google Patents

Description

one

This invention relates to hydraulic hammers for well drilling.

Known hydraulic hammer, comprising a housing, a piston with a ring valve mounted on its tip, having an annular protrusion interacting with an annular tip protrusion, and an anvil.

However, the known hydraulic hammer has insufficient operational reliability and complex construction.

The purpose of the invention is to increase the operational reliability and simplify the design of the hydraulic hammer,

For this purpose, in the proposed hydraulic hammer one of the annular BBICTJTIOBs is made eccentric with respect to the axis of the hydraulic hammer.

FIG. I depicts a pre-hydraulic hammer, longitudinal section; in fig. 2 is a section A-A in FIG. one.

The hydraulic hammer has a housing 1 with openings 2, 3 and 4 and differential inside the annular valve 5 with an eccentric annular protrusion 6 placed inside it, a piston-hammer 7 with an annular protrusion 8 and a piston to the valve 9. In the lower part the housing 1 is closed with a spline nut 10, in which an anvil 11 is placed, is fastened with a chisel 12. In a slit 10 and anvil 11, exhaust channels 3 are filled. The piston hammer 7 and piston-valve 9 are supported on a piece of springs 14 and 15 uncompensated by pressure.

Hydraulic hammer works as follows. The flushing fluid for the operation of the hydraulic hammer is fed through a column of pipes (not shown), which is attached to the upper part of the housing 1. In the initial position of the hydraulic valve (see fig. 1), the exhaust channels 13 are blocked by a valve 5. When the flushing liquid is fed into the hydraulic hammer piston-valve 9 and piston-hammer 7 due to the presence of areas uncompensated by pressure rush upwards, compressing the springs 14 and 15 located in the area of their uncompensated gaps, communicating with openings 4 and 3 with the annular space.

In this case, the piston valve 9 moves upward with some advance. After stopping the piston-valve9, the piston-hammer 7, not the income to the extreme position, touches with its protrusion 8 for the internal eccentric annular protrusion 6 of valve 5 and tears it off the anvil 11, opens

exhaust ducts 13. Next, the valve 5 moves independently due to the presence of an area uncompensated by pressure, which communicates through the openings 2 in the housing 1 with the annulus space. When closing the hammer 7 with the valve 9, the liquid column in the pipeline stops and a hydraulic shock occurs, the action of which, as well as the expansion springs 15 and 14, the piston valve 9 together with the hammer piston 7 (in closed at the same time, the piston-valve 9 is held back by the stopper in the housing 1, and the piston-MO tray detached from it strikes the anvil 11 fastened to the bit 12 and, with its movement carried away by valve 9, closes the exhaust Channels 13. Go on.

Г 12Ю 15 11 5 6 17 i-. P ILL .., Li I f I: iiii (i jK

the second hydraulic shock in the lower part of the piston-hammer 7, enticing him and the piston-valve 9 upwards.

The process then repeats.

Claims (1)

Invention Formula A hydraulic hammer comprising a housing, a piston with an annular valve mounted on its tip, having an annular extractor that interacts with an annular tip protrusion, and an anvil, characterized in that, in order to increase operational reliability and simplify the design, one of the annular projections is eccentrically shaped hydraulic hammer axles. 9 15. / /