US1564793A - Water-tube guide - Google Patents

Description

Patented Dec. 8, 1925.

UNITED STAT Es PATENT fo 1,564,793 FFlcE'..

SOLL-RAND COMPANY, J'ERSEY. I

OFJERSEY CITY, NEW JERSY, A CORBORATION 013' NEW Warns-munn GUIDE.

Appncation fllea 'september ao, 1924. serien Na. 740,709.

To all whom z't may concern:

Be it known that I, GEORGE W. HULsHIzER, a c'itizen of the United States, and a resident of Stewartsville, county of `Warren, and State of New Jersey, have invented a certain Water-Tube Guide, of which the following is a specification, accompanied by drawings.

This invention relates to vfluid actuated percussive machines, and more particularly to rock drills of thehammer type which employ means'forconducting cleansing liquid to a hollow drill steel for removing cuttings from a drill hele and allaying dust incident to drilling. The liquid conducting member so employed is usually in theform of a tube supported at its rearward end and extending through a reciprocating element into a drill steel, thus leaving the forward end of the tube suspended throughout its length, and subjecting it to severe strains and wear due to vibration of the drill. p By arranging an vadditional support for the Vwater tube near vits forward end, thus eliminating vibration thereof. it has' been found that'fthe life of the tube may be considerably lengthened' In some rock drills two longitudi-nally arranged tubes are employed, one of which is adapted to convey water and the other aV pressure fluid, usually air, the motive fluid being employed to augmentthe water pressure. AIlthough the tubes thus employed conduct their respective fluids directly from a source of supply to the drill steel, there is no assurance of their proper intermingling at regular intervals, whereas, byl using only one tube, fluid pressure may be provided through controlled leakage past the piston and associated parts, the leakage thus employed preferably being supplied directly om a source of supply, thus causing water and air to inter'mix in suitable proportions for removing cuttings from the drill hele.

One object of this invention is to support the water tube near its front end in a rock drill of the hammer type. v

Further objects will hereinafter appear in the following description and the accom-v panying drawings illustrating' the invention in one of its preferred forms.

Figure 1 is a longitudinal view partly in section of a hammer type rock drill equipped with a water tube guide in accordance with the practice of the invention.

1 Figure 2 taken on the line 2-2 of Figure 1 is a transverse sectional view of a hammer type rock drill vshowing'the water tube guide and adjacen'tl parts, and

Figure is a perspective View of the wateritube guide.,` 'i

Referring to the drawings, the invention is shown embodiedfl'in va rockdrill of the drifter'type in which a back lcylinder A, a front cylinder B, al front head C supported within the hollow bore of the front cylinder B and a back head 'D are secured in oper--` atve relation by the usual side bolts (not' shown). A hollow drill Steel Efsupported within the front headO isv adaptedv to rercelve impact blows-of a reciprocatory hammer'piston F.

Distribution ofthe actuatingfluid isin this instance controlled by means ofthe rearwardly reduced endG of the hammer piston F. A throttle Valve H disposed within the cylinder A is adaptedl to control the supply of actuating fluid, said throttle Valve communicating with a supply pipe J through a passage K and .with'the dstributing element through a port L. i t

In order to'imparta rotary movement to` the drill' steiel E, thus keping it free'within the drillhole, a train of int'erl'ocking elementsis employed. To this end the piston'F is shown in slidable engagement at its v`rearward end Grwith a rifiebar O. and in 'sim y ilar engagement at its forward end with a chuck P through the medium of a chuck nut Q. Disposed within the forward end of the front head C is a chuckiaw R, rotatively engaged with the chuck P by means of clutch members S and T. the chuck jawR in turn interlocking with wings U of the drill steel E by means of flat sides V in a recess W. Withinthe head X vof the rifle bar O are arranged a plurality of pawls adapted. to engage a rotation ratchet Y.V

ssV

By arranging the rotative elements in this manner a rotary movement is imparted to the drill steel on' the backward stroke of the hammer piston` thus using the energy of the piston on its forward stroke for impact purposes only.

In accordance-with the invention, a cylin- .are formed in the wall of the guide Z. The

holes e are so disposed that one side cuts into the bore c as at c' and communica'tes with the drill steel E through the recess f and the passage g Vin the nose h of the hammer piston IT.

In Operation the end G of the piston F ls in Continuous contact with the motive fluid, air is therefore constantly leaking past the .flutes j of the rifle bar O into the interior la of the piston F, irrespective of the position of the hammer piston, and as the piston F travels on the upward stroke air continues to flow through the piston to the=drill steel until thel point m of the bore g comes in contact with the enlarged portion 'd of the water tube Z). 'Since the bore g is of substantially the same diameter as the enlarged portion d of the water tube b, a seal is ef- 'fected and the flow of air to the drill steel is checked until the piston again reaches va point in its forward travel where the sealing contact between the bore g and the enlarged Iportion d of the tube b is removed. In this manner an intermittent flow of motive fluid is admitted to the drill steel where it will intermix with the eleansing fluid near the tapered end p of the tube Z).

In some cases the water tube'is supported only at its rearward end without additional support throughout its length, but when the rock drill is in Operation, the vibration caused by the reciprocating elements imparts a whipping motion to the tube, thereby causing. it to strike against the walls of the ad'j'a'cent parts. This, in addition to stresses set up within 'the walls of the tube, often results in a comparatively short period of service for a tube thus secured.

'In the present invention thev guide'Z disposed within the bore qV of the piston F and secured either by a press fit as shown, or by other well known means, is adapted to support the water tube Z) slidably near its forward end. By so doing 'indiurious vibration of the tube b is eliminated and the all a guide litted into the-piston to recifprocate therewith and embrac'ing the water tubeito prevent vibration of saidtu-be, said guide having perforations throughout its iength for admitting pressure fluid to a'drill steel when the piston nears the end ofits for- Ward stroke.

2. In a fluid actuated rock drill, the com reciprocatory hammer piston having a rreduced bore inl its forward end, a water tube `bination of a cylinder with a -back head, va

said guide havinglongitudinal perforations communicating throughout their length with :the bore f in said fguide for admitting pressure fluid to a drill steel-'whenthe piston nears the end of its forward stroke. 1

In testi-mony whereof Ihave signed this specification. f p v GEORGE W HULSHIZEB.

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