SU1689611A1 - Hydraulic power unit - Google Patents

Abstract

The invention relates to mining and can be used in the extraction of stone, the destruction of oversize and foundations, when conducting mining. The purpose of the invention is to increase the efficiency of work by increasing the expansion stroke. The hydraulic power device comprises a body formed by cheeks (U), inserts (B) 16 and 17, and end caps with fittings for supplying the working fluid and elements for limiting the separation of U. The cavity of the body has a longitudinal tube made of elastic material in communication with the fittings. Two-stage pistons are installed in two-stage through radial holes Щ. The shape of the ends of the stages 14 and 15 of the pistons correspond to the shape respectively on (L C

Description

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the outer and inner surfaces of the U. Shirin h stages of the 15 pistons in the direction of separation B 16 and 17 are less than the total stroke of expansion B 16 and 17. After the installation of the usgroystch in the hole and the supply of the working fluid into the tube, it presses pch U and also on B 16, 17

and on the pistons. At the end of the stroke, the spreaders, Sh, stop at 16 and 17, and the pistons slide out of Sh, up to the stop of the steps 15 and into the bottom of the large steps of the orifice. Spreading U leads to a spall crack, and the pistons push the crack apart. 2 Il.

The invention relates to mining and can be used in the extraction of stones, the destruction of oversize and foundations, in the conduct of mining, and the study of the stress state of an array of jural species.

The purpose of the invention is to increase the efficiency of work by increasing the expansion stroke.

Figure 1 presents a General view of the device in the direction of separation of the inserts with a partial longitudinal section; figure 2 - section aa in figure 1.

Hydraulic power device consists of a working chamber 1, made in the form of a thick-walled tube of elastic material, for example, vacuum rubber. The opposite ends of the working chamber 1 are put on the fittings 2 for supplying the working fluid, and its ends are in contact with the dies 3. The fitting 2 with the dies 3 are installed in the 4 Vi coupling is clamped with a nut 5. On the outer surface of the fitting 2 there is a stop 6 with an annular protrusion. The clutch 4 at one end contains a flange 7 on which sliding cheeks 8 are put on the annular inner groove. To limit the progress of the cheeks 8, they contain elements of limiting the stroke of the sliding stroke in the form of annular projections 9 at opposite ends. To keep the cheeks e assembled, they have grooves 10 in which elastic rings are laid 11.

The 8 cheeks 8 are perpendicular to the longitudinal axis. Two-sided through radial holes 12 are made into which the stroke increase pistons 13 are installed, consisting of smaller 14 m large 15 stages. Between the cheeks 8, trapezoidal cross-section inserts 16 and 17 are installed longitudinally, with inclined faces adjacent to the transverse bevels of the inner surfaces of the cheeks 8 and facing the large bases of the trapezoid towards each other. Dies 3, couplings 4, nuts 5 and flange 7 form an end cap. These plugs, cheeks and inserts form a body, in the cavity of which a longitudinal tube is located. Hole 12 in series

are along the length of the cheeks 8 and are turned in large steps inside the body. Pistons 13 are installed in holes 12 with the possibility of radial separation and stop at the end of the stroke.

with their large steps into the bottom parts of the large1 steps of the openings 12. The end surfaces of the steps 14 and 15 of the pistons 13, respectively, have the shape of the outer and inner surfaces of the cheeks 18. The width

stages 15 in the direction of the sliding inserts less than the width of the total stroke of the sliding inserts 16 and 17.

The outer diameter of the stroke limiter does not exceed the diameter of the device along the cheeks in a compressed state, and the diameters of the interacting annular protrusion of the stroke limiter 6 and the annular protrusion 9 of the cheeks 8 differ by an amount equal to the stroke of the cheeks 8.

Hydraulic power device operates as follows.

A device is inserted into the drilled hole and connected to the hydraulic

high pressure pump. When the working medium enters the working chamber 1 under pressure, it presses against the walls of the working chamber 1 and expands it in diameter. When expanding, its walls with force act on the cheeks 8 and inserts 16 and 17 and thus move the cheeks 8 in the radial direction. The cheeks 8 and the pistons 13 force the wall of the hole and cause a crack under it at a certain pressure. The cracks increase until the limit stops 6 are activated. With the appearance of a crack, a pressure much lower than the initial pressure is needed to further increase it. After the stroke 6 stops moving, the further movement of the cheeks 8 is stopped, and the movement is continued under the influence of pressure in the working chamber 1 of the pistons 13 mounted in the holes 12. In this case the steps

14 forcefully acts on the wall of the bore-hole and widens the crack until part of the array is broken off.

During operation of the device, the flange 7 of the coupling 4 interacts with the internal groove

cheeks 8 and prevents longitudinal (axial) movement of the nozzle 2 and dies 3

Nut 5 regulate the clip of the vacuum rubber in the coupling 4.

Upon completion of the destruction of the array, the hydraulic power unit is removed from the hole and the pistons 13 are returned to their original condition.

Claims (1)

Claims of the Invention A hydraulic power device comprising a body formed by longitudinal sliding cheeks with transverse bevels on surfaces facing each other, inserts of trapezoidal cross section longitudinally mounted between the cheeks, adjacent inclined faces to the bevels of the cheeks and facing large bases of the trapezium each to a friend, end caps with fittings for supplying the working fluid and elements of limiting the stroke of the cheeks, a tube of elastic material, lengthwise five bz {8 a a  h g but installed in the cavity of the body ofyja called cheeks, inserts and plugs and communicated with the fittings for supplying the working body, characterized in that, with In order to increase the efficiency of the device by increasing the expansion stroke, it is equipped with two-piston pistons, and the cheeks are made with two-step radial through holes, arranged in series along their length and facing large steps inside the housing, while the pistons are installed in the holes with possibility of radial separation and stop at the end of the turn with their large steps to the bottom parts of the large steps of the holes, with the end surfaces of the smaller and larger piston steps having the shape of the outer and inner surfaces of the cheeks, respectively, and the width of the large piston steps in the direction of the expansion of the inserts is less than the total stroke of the expansion of the inserts. Fig