DE2553052A1 - CORE DRILLING DEVICE, IN PARTICULAR FOR BUILDING BASE INVESTIGATIONS - Google Patents

Description

Core drilling device, in particular for subsoil investigations

The invention relates to a core drilling device, in particular for building ground investigations.

There are drilling rigs known which are primarily used for identification the stratification of the soil can be applied by taking samples from a z. B. by a Internal combustion engine driven vibrators exist, wherein the vibrator is provided with a clamping head in which the upper end of a drill pipe set is attached, which is equipped at its lower end with a simple core drill is, such as B. a core drill bit. The basic sampling is carried out by inserting the core drill bit into the ground Vibration - being both the core drill and the

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associated drill pipe assembly through the interior of a clearing device be introduced to the sampling depth. The sample is in the core drill by means of a catcher with above the lamellas attached to the core drill bit. The core drill is also brought to the surface by vibration pulled out.

The main disadvantages of such drilling devices are that samples (cores) are not can be taken and that the samples are mostly affected by the vibrations that occur.

The device according to the invention eliminates these disadvantages in that it has a vibrator from which the vibrations be transferred to a drill pipe, at the lower end of which sits a ground feed knife; are within of the drill string, mounted over its entire length cylindrical jacket, which are divided along two surface lines. The pulling out of the set is carried out either with the help of a fixed to it and actuated from the surface Cable, or by shaking with the help of a safety catch, which is provided with jaws, which the set itself can only move upwards. In the case of sampling from plastic flowing soils is between the knife and attached to the lower part of the drill string a sampler provided with an inner flap, the shape of which changes from the intersection of two cylinders with mutually perpendicular axes, and from its upper position in

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a position placed on a seat can be moved so that the sample is held by means of the cable within the jacket will.

The following is an embodiment of the invention in various Variations described with reference to the drawing.

Pig. 1 shows the embodiment in view, partly in longitudinal section,

Pig. 2 shows a longitudinal section through on a larger scale a cutting head with a sample catcher attached above the cutting edge , '

Pig. 3 shows the Pig sample catcher. 2 in the locked position,

Pig. 4 also shows a cutting head in longitudinal section a sample collector modified in the manner of a ball valve,

Pig. 5 also shows another longitudinal section (on one side) Design of a sample catcher with springy lamellae pointing diagonally upwards,

Pig. 6 shows a device for pulling the drill rod, in particular by means of smacking or vibrations.

The drilling device according to Pig. 1 has one on a baseplate 4- mounted vibrator 1, which is operated by means of a V-belt 3

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and pulley 2 of one also on the base plate mounted (not shown) engine is driven (preferably an internal combustion engine is used). The vibrator 1 but can also be driven electrically, pneumatically or hydraulically will.

At two opposite ends of the base plate 4 handles 6 are provided for handling the device. The handles 6 do not grip directly on the base plate, but about damping springs 5 · And that are each above and below the base plate 4 a damping spring 5 is provided, through each of which a clamping screw extends; each sits at the lower end of the clamping screw a handle 6. It is therefore preferably a portable device. The handles 6 also become the feed applied pressure required during drilling.

The vibrations caused by the operation of the vibrator 1 can either be longitudinal or both longitudinal as well as be transversal.

Below the vibrator 1, below the base plate 4, is a Clamping head 7 for fastening at the upper end of the topmost Boring bar provided. The clamping of the drill string set 8 and the clamping head 7 can, for. B. be achieved by screwing, d. H. one with radial handles Union nut is screwed onto the thread of the boring bar, which means that it trains an attachment on the clamping head

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frontal ring surface of the boring bar is pressed.

Cylindrical jackets 9 are located inside the drill rod 8 appropriate. The mangles 9 are preferably along two surface lines divided. The entire inner wall of the drill string is thus made up of loosely fitting, cylindrical shells or jackets 9 lined. These sheaths are used to hold and protect the drill sample that penetrates the interior during drilling. In particular, the drill samples remain enclosed by the cylindrical defects 9 after the drill rod has been pulled and can remain on or in the jackets 9 ″ and from these carried and protected from the boring bars and further handled. Even with loose, crumbly items, at least Coherent drill samples can thus be taken from material that is not very dimensionally stable, showing the sequence of layers of the subsurface exactly.

At the lower end of the drill string a knife 10 or a cutting head is attached, which depending on the nature of the traversed Soil has different shapes. According to the drawing, the cutting head has a relatively simple, conical ring cutting edge on.

Above the knife 10, outside the drill pipe set 8, is in a manner known per se, such. B. by welding, a fastening handle, not shown in the drawings, through which a cable 11 is inserted which is attached to the handle by means of one in the drawings

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not shown wedge is stretched. For example, the cable 11 can be operated manually from the surface with the aid a winch 12 set up in the vicinity of the ßohrgestangegarnitur 8.

If samples are to be taken from a plastically flowing subsurface, between the cutting head IO and the lower one At the end of the drill string 8, a sample catcher A is inserted (FIGS. 1 and 3). The sample catcher has an intermediate cutting head and linkage interposed cylindrical jacket 13 on to which a flap 14 is articulated by means of pivot pin 15, which has a radially protruding lever b on which at c a cable 11 for actuating the flap from the surface from attacks. The shape of the flap results from the cutting through or penetration of two cylinders with axes perpendicular to each other. The flap 14 thus represents a section of a cylinder with the same diameter as the interposed sleeve 13, so that the flap 14 in the pivoted up position completely against the wall of the Bushing 13 (coat 13) is applied. The sample material has a free, unimpeded passage despite the flap. Of the The edge of the flap corresponds to the intersection line Curved arched and comes in the locked position on an inserted, correspondingly arched seat sealingly to the plant.

The fastening of the flap 14 on the jacket 13 is carried out by means of a bolt 15 which controls the movement of the flap allows their upper to their lower position and vice versa;

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25b30b2

they are operated by means of the cable 11, which for this purpose passes through a hole made in the tongue b is introduced. On the outer part of the jacket 13 is, in a manner known per se, such as by welding, a protective plate 16 is attached, the role of which is to protect the tongue b of the flap 14. By operating the cable from the surface, the flap 14 is shifted downwards, where it is arranged on a shoulder d

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Seat 17 seen, by means of which it is fastened between the knife 10 and the jacket 13. The seat 17 is on its upper part is processed in such a way that it seals the space above by placing the flap 14 on it the flap 14 with respect to the surrounding means. By lowering the flap 14, the one below it becomes Sample portion ejected.

If there are layers of sand below the groundwater level are pierced, a sample catcher B is attached to the lower part of the drill pipe set 8, which consists of a body 18 consists, the lower part of which expires in a knife e (Fig. 4). Above the knife e is a seat f is provided on the si'ch a ball 19 can put on, with the help of which the seal of the hem located above the same sphere can be achieved in relation to the surrounding means. In order to avoid that the ball 19 does not penetrate simultaneously with the inlet of the samples into the jacket 9, is in an im Inside the body 18 provided locking g a support 20 is provided.

When traversing greasy floors is on the lower one Part of the drill string set 8, another catcher C (Fig. 5) attached, which consists of a body 21, the lower part of which terminates in a knife 4, above which in the interior circular seat i is provided, in which there is a ring 22 with elastic blades j, whereby the sample in

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the jackets 9 can penetrate and is retained during the extraction of the drill string assembly 8.

The drill pipe can, if the reason allows, be pulled by vibration, in which case around the surface a safety gear is attached to the set 8. This consists of the jaws 23 (! "Fig. 6), which by means of axes 24 are hingedly attached to the supports 25 arranged on a base 26. The jaws 23 are provided with extensions K, which are exposed to the pressure of the coil springs 27, so that the drill string assembly 8 is pulled out upwards but cannot sink downwards.

The device according to the invention has the following advantages:

- Sampling along the entire drilling depth, in the form of a continuous column;

- Favorable recovery of the sample, whatever the nature of the soil penetrated;

- Achieving relatively high feed rates in the ground;

- Simple and easy-to-use construction according to the site conditions.

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Claims (7)

Patent application 1. Drilling device for taking soil samples with a acted upon by a shaker (vibrator), with a cutting head that corresponds to the nature of the subsurface or core drill bit provided drill rods, characterized in that that the drill pipe (8) is lined inside over its entire length with cylindrical jackets (9), which are longitudinally cut along two surface lines and into which the soil sample during the advance of the drill string (8) penetrates, whereby to hold back the soil sample in the rod or inside the jacket at the bottom End of the drill string, above the cutting head (10) one preferably from the surface via cable (11) actuatable flap (14-) or automatically acting safety gear are provided. 2. Device according to claim 1,
characterized, that a sample collector sleeve (13) is interposed between rods and cutting head (10), in particular for taking samples from plastic flowing soils, in which a flap (14) is arranged to be pivotable about a transverse bolt (15) on which an outwardly protruding arm ( b) is provided, on which an actuating cable (11) engages, which on the surface can preferably be wound onto a winch (12) when the rod is pulled. 609846/0239 f- 2553Q52 3. Device according to claim 2,
characterized, that the shape of the flap (14) by the cut or the penetration of two mutually perpendicular cylinders given is. 4. Device according to claims 2 and 3 »characterized in that that the flap (14) is worn in the closed position on a seat, which is preferably by the upper hand an inserted sleeve (17) is formed. 5 device according to claim 1,
characterized, that a safety device in the form of a check valve (18, 19, 20; Fig. 4) is provided. 6. Apparatus according to claim 1, characterized, that as a safety device in the cutting head (21) above the cutting edge (H) is provided with a ring with resilient tongues (J) pointing obliquely inwards / upwards. 7. The device according to at least one of the preceding claims with one acting on the upper end of the drill string Clamping device for pulling the drill string, preferably by means of vibrations, 609846/0239 ~ characterized, that on a horizontal plate (26) two clamping jaws (23) diametrically opposite the drill rod (8) and around horizontal Axes (24) are arranged pivotably, which have outwardly pointing arms (k), and that between the arms (k) and the plate (26) compression springs (27) are interposed. Bibliography: _t Patent People's Republic of Poland No. 49466
Patent Federal Republic of Germany No. 1 634 524 Prospectus, People's Republic of Poland: "Equipment for geological work, driven by a vibrating hammer". -frfr9-