FI103430B - A drill device and method for drilling a hole into a variety of different soil types - Google Patents

Description

103450

DRILLING DEVICE AND METHOD FOR DRILLING A HOLE IN SEVERAL DIFFERENT SOILS

The invention relates to a drilling device for drilling holes both in rock or rocky soil and in soft clay. When making a hole, soft soil is forced aside and the rocks and rock are drilled.

Various stings are known in the prior art which are forced into the soil via a stubble. As it advances, the stall will displace the soil to the side of the hole. The mandrel is usually replaced by a tube that is inserted into the mandrel and left in the hole. Such a sting proceeds by forcing only in favorable soil.

Holes in soft soil have also been drilled, e.g., by rotating a blade or screw blade through which soft soil, as a large mass flow, is easily moved backward and deflated.

Em. drill rigs are drill rigs that are suited to a specific soil quality and can hardly make holes in other types of soil.

Surprisingly, the drill device and method according to the invention are applicable to all kinds of paints present and the invention is characterized by what is stated in the claims.

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The most important advantage of the invention can be seen that with the same 4 M 4 ^ ·. · ·:: Drill hole for all types of paint can be drilled. Soil quality does not need to be studied and no drill rigs or blades are required. joke to change as soil quality changes. When the blade is striking • · ... and rotating and equipped with workable elements, it is capable of drilling rock and stones. Further, the conical shape of the blade causes soil to sink to the outside of the blade * · 1 in soft soils without having to be removed from the hole.

: This happens automatically as the blade advances. For soft soil. . boring is usually quick and there is plenty of material to remove. When the bulk of the pulp is rolled out of the hole, there is virtually no removal of the 2 103430 pulp through the hole. The drilling operation is continuous without any blade change delays, which makes the use of such a universal drill device advantageous.

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

Figure 1 is a sectional view of a drill bit tip.

Figure 2 is a front view of the blade.

Figure 3 is a sectional view of the tip of another drill device. Figure 4 is a front view of the blade.

Figure 5 shows the blade in section from B to B.

Figure 1 shows a tip portion of a drill device having an impact machine 1 which strikes the blade assembly 2.3. The blade assembly is also rotated through the impact machine. The blade assembly includes an inner blade 2 and a ring blade 3 around it. The inner blade 2 can be pulled out of the hole with the impact machine in the middle of drilling. The outer blade 3 is supported by a guard tube 4 to be pulled into the hole by a connection allowing rotation and small length movement. The outer blade pulls the guard tube into 4 holes during drilling.

The impactor produces a pressurized medium, which is most often: Compressed air through duct 8 through the blade in front of the blade. This air: is led back through the blade from the ducts 6, whereby the air flow • I '·; takes with you drilling waste. When drilling a rock, you cut the rock 5 pins attached to the blade, removing the chips from it;

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through the back and out of the hole. When drilling soft ground, such as clay, • it does not pass through the channels 6 as part of the SS ', but due to the conical blade, it drops to the sides of the hole, even when partly sealed. When the blade strikes and also rotates the drive «i · · · ·. * easily puts pulp to the side of the blade.

t ·: When drilling on soft ground, a larger stone or rock is encountered, soft ground ceases to exist and the blade begins to blow: ”·: drilling the rock material and transporting it through the channel 6 through compressed air.

Figure 2 shows a front blade showing also channels 7 and 8.

3, 103430

Fig. 3 shows an embodiment of a blade assembly with a taper angle t> 4, less than 90 °, and channels 12 through the blade leaving each step surface. For the blade pins 5, there must be a front face and the surface must not deviate too much from the surface perpendicular to the drilling direction. The blade studs will not endure if they strike the stone at an angle. The stepped conical ski is also suitable for displacing soft soil.

Figures 4 and 5 show in greater detail the location of the passages 12 passing through the blade. Further, grooves 14 which are directed away from the center are milled on the blade surface. These are intended to grind the ground in front of the blade when the blade is rotating to soften the ground. Loose soil moves more easily from front to side. On the other hand, the holes passing through the blade are of such a small size that, when rapidly advancing to soft ground, the soil cannot escape through the holes 12 but is more easily displaced to the side.

The taper angle of the blade may also be less than 701. The taper need not be of the same order of magnitude over the entire length of the blade;

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Claims (6)

103430 A method of drilling a hole or tunnel into a plurality of different types of soil, such as rock, rocky soil or clay, using the same impact and rotating blade or blade assembly (2,3), (9,10), with blade head surfaces or drilling members mounted thereon (5) are designed only to stroke rock, characterized in that the tapered blade has an apex angle of less than 90 ° and the conical shape of the blade displaces a substantial portion of the soft ground outside the drill hole while striking and rotating and rocks, rock, etc., mainly to be drilled as back drilling through the blade. Method according to Claim 1, characterized in that the rinse aid is introduced in front of the blade or blade assembly during drilling and displacement of soil. 3. A drill device for drilling a hole or tunnel in several different types of soil, such as rock, rocky soil or clay, using the same impact and rotating blade or blade assembly (2,3), (9,10), the front face of said blade being drilling means (5) for machining, characterized in that the blade is conical forward with a cone tip angle of less than 90 ° and that the blade is tapered conically comprising planar surface and working members (5). • · · • «· A drill device according to claim 3, characterized in that the rinsing channels (12,13) are led from the planar surfaces backward through the blade. The drill device according to claims 3 and 4, characterized in that the blade surface has grooves (14) to the rear. . Drilling device according to one of the preceding claims 3 to 5, characterized in that the taper angle of the blade is less than 70 °. 103430