FI98400C - drill Rig - Google Patents

Description

98400

PORALAITE - BORRANORDNING

The invention relates to a drilling rig according to claim 1, the drilling mechanism of which is detachable from the steel and can be reattached thereto when the rig is in a drilling situation.

Finnish patent 86571 discloses a device for drilling with a rotating and percussive blade, in which the percussion machine is behind the blade and there is a connection between the protective tube and the blade or the blade holder, by means of which the blade can pull the protective tube forward. In this solution, the blade is attached directly or via a blade holder to the impactor spindle with a conical thread. The threaded connection is tightened tightly so that it does not open when drilling. The thread may open when the blade hits soft ground with almost no abutment. Under drilling conditions, the threaded connection cannot be opened or tightened, allowing the blade to rotate freely. The percussion machine can be rotated in both directions from the mouth of the hole or tunnel, e.g. by means of the central tube of the drill, but at the same time the rotation of the blade cannot be prevented.

If there is a fault in the percussion machine, the hole ends in a closed space or the percussion machine and the conveyor thread or piping are otherwise desired in the middle of drilling, this is not possible with current solutions; list when using a one-piece blade. The connection between the percussion machine and the blade has only been openable with tools when the device is outside the hole. In addition, a large number of drilling rigs are known, the blade of which is solely under the control of the impact machine, i.e. the blade is not connected to the protective tube. In these cases, the blade may turn or escape in soft ground if ··· it has come loose from the impactor attachment for some reason. It is then impossible to get the blade back in the impact machine.

The solution according to the invention eliminates these problems and the invention is characterized by what is stated in the claims.

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The advantages of the invention are that even in drilling rigs in which the blade cannot be pulled out of the hole, at least the most valuable parts, such as the impact machine and conveyor devices, can be removed from the hole and back if drilling is continued. The blade can be made insignificant in advance, so that in certain cases, e.g. when drilling ends in a blind hole, the blade can be deliberately left at the bottom of the hole. On the other hand, the blade can also be made long-lasting, because with the solution according to the invention the percussion machine can be serviced even during drilling by pulling it out of the hole and thus the probability of successful drilling increases. The guide connection between the blade and the protective tube always keeps the blade in place in the hole when the impact machine is pulled out.

In the following, the invention will be explained in more detail with reference to the accompanying drawing, in which

Figure 1 shows a side view of the drilling rig.

Figure 2 shows the attachment between the impactor and the blade.

Figure 3 shows an end view of the attachment.

Figure 1 shows a drilling rig comprising an impact machine 1, a protective tube 2 to be left in the hole to be drilled outside it, an extendable conveyor piping 3 at the rear of the impact machine and an impact and rotating blade 4. The blade 4 is provided with working pins 5. The outer circumference of the blade 4 has a groove 12, in which the ring 8 fixed to the edge of the protective tube #t "2 is located, limiting the movement between the blade and: *; * in the axial direction. Through the blade 2 there is a channel 6 for conducting compressed air from the impact machine to the front of the blade, from where it carries back drilling debris through the channel 7. is in direct contact with the blade surface to the blade 4, to which the impacts are thus transmitted.The impact mechanism is further pushed from behind with a suitable force through the transport piping to maintain contact at the moment of impact at least at the moment of impact. 2 book. The solution to the figure is a simple version of the invention. However, in order to ensure safer operation, the connection between the blade 4 and the impactor must be provided with a lock 3 98400 or at least a control which ensures that the blade and the piston of the impactor remain concentric during rotation.

Figure 2 shows a version of the locking between the blade and the impact machine. The piston 9 of the percussion machine has pins 10 or similar projections, which are located with a small rotational movement behind the counterpiece 11, i.e. behind the corner pieces 11 formed in the blade 4. Figure 3 shows the same from the end. Such a joint also opens and engages in the hole due to a small locking force which is less than the rotational resistance of the blade.

The connection between the blade and the impactor can be made in a number of easily detachable ways, which have in common the formation of a buffer surface between the impactor piston or spindle and the blade to impart impact to the blade, the guide having guide surfaces or members to keep the piston in contact with the blade during rotation and machining; that when the impactor is placed back in the hole and as it approaches the blade, its spindle or piston is guided on the abutment surface of the blade.

There can also be a blade cheap and a simple one-piece blade that is left in the hole and pulled the other equipment out of the hole. In this case, the steel is made into a relatively thin disc and is supported by a mandrel which is pulled out with the impactor. This% * • · arrangement is most often displayed when drilling down holes, ..I: at which point they terminate to some depth.

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Claims (5)

98400 A drilling rig with a single impact and rotating blade (4), wherein the impact machine (1) generating impacts on the blade is immediately behind the blade (4), the impact machine (1) transmits rotational movement to the blade (4) and the circumference of said blade has a protective tube (2) and the connection between the blade (4), characterized in that the contact or secured attachment between the percussion machine (1) and the blade (4) can be opened and locked in a drilling position, such as a hole or tunnel, only by rotating and / or moving the percussion machine (1), and that the blade (4) is in place on the protective tube (2) by means of the connection (8), (12) with the impact machine (1) removed from the drilling station. Drilling rig according to Claim 1, characterized in that the piston (9) of the percussion machine (1) strikes the blade (4) directly. Drilling rig according to Claim 1, characterized in that the spindle attached to the impact machine strikes the blade (4) and there is a detachable connection between the spindle and the blade. Drilling rig according to Claim 1, 2 or 3, characterized in that the fastening (10, 11) between the impact device (1) and the blade (4) transmits rotational movement from the impact device (1) • · ..1! blade. • · · • · • · • · Drilling device according to one of the preceding claims 1 to 4, characterized in that a pressure medium channel: (6) is passed to the blade via a butt connection between the blade (4) and the impact machine. • · · • · · 98400 PAT ENTKRAV