DE212463C

DE212463C -

Info

Publication number: DE212463C
Application number: DENDAT212463D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

abgeleitet wird.is derived.

Die Erfindung betrifft eine.staubdichte Spülvorrichtung für Gesteinbohrniaschinen, bei welcher eine biegsame Haube mit Abdichtung um die Bohrlochmündung gepreßt und der Schlamm in einen Setzbehältei: abgeleitet wird. Gegenüber bekannten Spülvorrichtungen dieser Art ist die vorliegende dadurch gekennzeichnet, daß das Andrücken an verschiedenen um den Umfang des Bohrloches verteilten Punkten des Randes der elastischen Haube erfolgt. Hierdurch wird erreicht, daß sich die elastische Haube auch erheblichen Unebenheiten an der Oberfläche der Bohiiochmündung leicht anpassen kann und dadurch einen luftdichten Abschluß erzielt, wie er infolge des innerhalb der Haube herrschenden Überdruckes in diesem Falle notwendig ist. Das Anpressen an den verschiedenen Stellen des elastischen Randes erfolgt dabei vorteilhaft durch eine- Anzahl einzelner nachstellbarer Druckstücke. Die Nachstellung kann durch Spannschrauben mit Überwurfmuttern erfolgen, die sich 'gelenkig gegen den feststehenden Zylinder der Bohrmaschine abstützen. Es kann aber statt dessen auch das Anpressen dieser Druckstücke unter Beibehaltung ihres nachstellbaren Gestänges mittels Druckluftkolben erfolgen. Die Zylinder dieser Kolben können an die Druckmittelquelle für den Betrieb der Bohrmaschine angeschlossen sein, es muß nur durch Wahl eines richtigen Kolben querschnittes dafür Sorge getragen werden, daß der Anpressungsdruck genügend den in der Haube herrschenden Überdruck übersteigt, um ein druckdichtes , Anliegen der elastischen Haube an der Bohrlochmündung zu gewährleisten.The invention relates to a dust-tight flushing device for rock drilling machines, which have a flexible hood with seal pressed around the borehole mouth and the mud is drained into a settling container. Compared to known flushing devices of this type, the present one is characterized in that the pressing on different around the circumference of the borehole distributed points of the edge of the elastic hood takes place. This ensures that the elastic hood also has considerable bumps on the Surface of the Bohiioch mouth can easily adapt and thus an airtight Achieved conclusion, as it is due to the overpressure inside the hood in this Case is necessary. The pressing on the different points of the elastic edge takes place advantageously by a number of individual adjustable pressure pieces. the Adjustment can be done by means of clamping screws with union nuts, which are 'articulated support against the stationary cylinder of the drill. But it can take place also the pressing of these pressure pieces while maintaining their adjustable linkage by means of a compressed air piston. The cylinders of these pistons can be connected to the pressure medium source be connected for the operation of the drill, it only needs to be ensured by choosing the correct piston cross-section be worn that the contact pressure is sufficient to that prevailing in the hood Excess pressure exceeds the pressure-tight fit of the elastic hood at the borehole mouth to ensure.

Fig. ι der Zeichnung zeigt die Vorrichtung an einer drehenden Gesteinbohrmaschine teils in Ansicht, teils im Schnitt, währendFig. Ι of the drawing shows the device on a rotating rock drilling machine in part in view, partly in section, while

Fig. 2 eine Seitenansicht des Spülkopfes in vergrößertem Maßstabe ist.Fig. 2 is a side view of the flush head on an enlarged scale.

Die Bohrkrone 1 des hohlen Bohrers ist mit Kanälen 2 für den Durchtritt des .Wassers versehen; der hohle Bohrerschaft wird von einer Pumpe b durch eine Leitung c mit Wasser gespeist. Gegebenenfalls kann die Zuführung des' Wassers auch aus einem natürlichen Hochbehälter erfolgen. Nachdem das Wasser durch die Kanäle 2 und den Bohrkopf ι vor Ort des Bohrloches gedrückt ist, gelangt es in bekannter Weise an der Bohrlochwandung 6 entlang in die staubdichte Kammer e. In ihr setzt das Wasser den Schlamm ab, der beim Bohren entsteht. Die Kammer e ist von einer kegelförmigen oder ähnlich geformten Haube umschlossen, die den Bohrerschaft und die .Bohrlochmündung rings umgibt. Die biegsame Wand 7 besteht aus einem kegelförmigen Stück Gummi oder Guttapercha, starkem wasserdichten Kanevas, Leder, Fell oder anderem geeigneten Stoff mit einem verstärkten Flansch 8, mit welchem es luftdicht unter Einschaltung einer entsprechenden Packung 12 gegen das unebene Gestein gepreßt wird, derart, daß eine gute Abdichtung für die in die Kammer zu leitende Flüssig-The drill bit 1 of the hollow drill is provided with channels 2 for the passage of the .Wassers; the hollow drill shaft is fed with water by a pump b through a line c. If necessary, the water can also be supplied from a natural elevated tank. After the water has been pressed through the channels 2 and the drill head ι on site of the borehole, it passes in a known manner along the borehole wall 6 into the dust-tight chamber e. In it, the water deposits the sludge that is created during drilling. The chamber e is enclosed by a conical or similarly shaped hood which surrounds the drill shaft and the .Bohrlochmündmündung. The flexible wall 7 consists of a conical piece of rubber or gutta-percha, strong waterproof canvas, leather, fur or other suitable material with a reinforced flange 8, with which it is pressed airtight with the inclusion of a corresponding packing 12 against the uneven rock, such that a good seal for the liquid to be conducted into the chamber

Claims

arises. Since there is overpressure in chamber e , the flange of the flexible hood must be pressed against by mechanical means, which is advantageously done by means of the turnbuckle-like clamping screw 9 with right and left threads, which are inserted into union nuts 10 and have articulated connections 11. Instead, compressed air could also be used to press the sealing flange. The pressure would then have to be so high that it is always greater than the highest overpressure that can arise inside the hood e , so that this overpressure does not push the drill off the work site. The air pressure could in this case take place against the flange 8 of the flexible hood by means of a group of articulated or angular pressure pieces which are connected by joints to a pressure plate or to pistons for receiving the air pressure. The length of the connection could also be adjusted by using screws or a similar adjusting device.

. can be made adjustable.

If the hood e is made airtight and watertight in the manner described, the sludge water contained in it cannot escape at any point other than through the line 13 into the setting tank f. The end of the drilling cylinder d, which is fastened in a known manner to a tensioning column is, and the sealing chamber e are held in their set position during work by the turnbuckles mentioned. The turnbuckles find their abutment on the cylinder. The space in the chamber e is connected by a hose 13 to the settling container f , which advantageously stands on rails in a movable manner. This container is used to carry away the collected drilling dust. At the same time, the drilling mud entering the settling tank can serve as a sample for analyzes; After the sludge has settled, the water can be sucked off through perforated screens or reused for rinsing using a suitable filter material 14 and fed back to the pressure pump b. This pump b can, if a natural elevated tank is present, also serve to increase the pressure.

The rear end of the drill shaft is passed through a waterproof stuffing box 15, 16 connected to the pressure line c of the pump.

A major advantage of the flushing device according to the invention is that it is permanent dust-tight seal with the formation of a water chamber directly at the borehole mouth, which immediately collects all resulting dust as sludge and from the Work site leads away to a remote settling container without risk to workers. Particularly this advantage is important when it comes to ridge drill holes or inclined holes upward holes are.

Ρλ τ ε ν τ - A N s ρ R ϋ c H E:

ι. Dust-proof flushing device for rock drilling machines, in which a flexible hood with a seal around the borehole mouth pressed and the sludge is discharged into a settling tank, characterized in that the pressing at different points of the edge distributed around the circumference of the borehole the elastic hood takes place, for better adaptation to unevenness of the surface of the borehole mouth.

2. Dust-tight flushing device according to claim i, characterized in that the Pressing the elastic edge of the hood by a number of individual adjustable Pressure pieces (11) support themselves against the stationary cylinder by means of articulated. the clamping screws (9, 10) takes place.

3. Dust-tight flushing device according to claim 1 and 2, modified to the effect that the pressing of the articulated pressure pieces (11) by means of air pistons and cylinders he follows.

1 sheet of drawings.