DE216717C - - Google Patents

Description

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IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 5 a. GROUP

Water hammer.

Patented in the German Empire on October 15, 1907.

A number of deep drilling devices are known which use water hammer. In all of these devices, the working piston is given a certain lively force by the water hammer, without the water column itself contributing when the chisel hits, also: the stroke is only small because the hydraulic recoil has to ^{open the Ar j beitsventils.}

ίο With the subject matter of the invention, on the other hand any stroke can be achieved through a special arrangement within wider limits, in addition, a double surge of water is generated with each stroke, the first of which

serves to initiate the downward movement of the chisel piston, while the second the impact water column applied force again at the moment the chisel was raised submit this.

The invention is on the drawing in one. vertical longitudinal section and a cross-section shown.

The cylinder b with the hollow piston c sliding in it and sitting on a spring e hangs on the linkage α. A poppet valve d is built into the piston c and is kept closed by the fixed bridge f when it is at rest. The drilling tool hangs on the piston c. The valve d has below and. above guide rods d ₁ and d ₂ . A slotted resilient ring g sits on the lower guide rod _{A 1} and is held in a holder h to prevent it from being displaced upwards and downwards. The ring g exerts a braking effect on the rod A ₁ and holds the valve d firmly in every position. This braking is known per se. The upper valve rod d ₂ goes through the fixed bridge f and a spring i standing on it and has an adjustable nut k at the upper end. The length of the spring i is dimensioned such that the nut k until the end of the downstroke of the piston of the valve c and d on the spring i comes to bear, and sets the valve under spring action. An air chamber to limit the impact water column is arranged in the usual way above the cylinder b. When the pressurized water comes out of the linkage during start-up, it pushes the piston c downwards; the valve d remains closed. ' Towards the end of the stroke, the nut k comes onto the spring i and tensions it; as the piston c advances further, the tension becomes so great that it overcomes the water pressure on the valve surface and the frictional resistance of the brake ring g on the valve rod H _1. and the valve ei opens so that the water flows out. As a result, the pressures on the two sides of the piston are equalized, and the spring e throws the piston upwards until the bridge f closes the valve ^ held open by the brake ring g. The water hammer that occurs throws the piston downwards, with greater force than with the first companionway; the hydraulic recoil occurring at the moment, however, is capable of the valve. d cannot be opened because it is not yet under spring action and the brake ring

Claims (1)

is kept closed. So the piston is driven by the moving water column pushed forward until the opening takes place as with the first stroke, when the chisel has the Bottom of the borehole does not hit. But if the chisel hits the rock at the end of the stroke, so at this moment there is a second water hammer; the entire living power of the Chisel and the water column will be on ίο released the bottom of the borehole. The hydraulic one that follows after the second water hammer. Recoil finds the valve d standing under spring action and causes its opening, whereupon the piston shoots up and the further play of the chisel piston c and the control valve d is initiated with two water hammers each time. The brake ring g can also be replaced by any other means that is able to hold the valve in a certain position. Likewise, the spring i can be replaced by two or more springs that come into effect one after the other. ■ Patent claim: Hydraulic impact deep drilling device, in which water hammer is caused by means of a piston valve control, characterized by a poppet valve (d) sitting on top of the opening of the hollow chisel piston (c ), which is held in every position by a braking device (g) and only at the end of the depression of the chisel piston (c) comes under the action of one (i) or several fixed springs due to the water pressure, which then open it, so that the chisel piston (c), as a result of pressure equalization on both sides through its spring (e), snaps upwards, the Valve (d) is closed by a stop on a fixed bridge (f) and a water hammer is caused, through which the chisel piston (c) with the valve (d) held down on its seat with greater force than during the first companionway (when starting up) is thrown down, so that when the chisel hits the bottom of the borehole, a second water hammer, intensifying the impact, takes place, wora uf the hydraulic recoil the valve (d) , which is now under spring pressure, opens and the further play of the chisel piston (c) and control valve (d) is initiated with two water hammers each time. 1 sheet of drawings.