JP3254533B2 - Sludge sampling method using percussion drill and its equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

2. Description of the Related Art Conventionally, two types of ground sampling have been mainly performed: a wire line method for collecting cores by rotary excavation and a sludge sampling method by rotary excavation.

[0002] In the sludge sampling method by rotary excavation, a double pipe is attached to a rotary boring machine via a swivel, usually a drag bit is used, and a passage for compressed air is provided between the inner pipe and the outer pipe. Is a passage for sludge, and the sludge is pumped by compressed air from a compressor to collect mud in the stratum by means of a facility on the ground, for example, a cyclone.

[0003]

However, the conventional rotary sludge sampling method and its apparatus are an extension of rotary excavation, and the speed of excavation is slow to obtain a large amount of data in a short time, which is the greatest weak point. I was The present invention has been made in view of the above circumstances.

[0004]

According to the method of the present invention, a double pipe rod is mounted on a percussion drill head via a cleaning swivel, and a cross bit and a ring bit are respectively screwed to the tips of inner and outer pipes. While blowing air into the inner pipe from the cleaning swivel, and sucking it from the gap between the inner pipe and the outer pipe through a sludge collector with a suction blower, the percussion drill head hits and rotates the cross bit and ring bit. And sludge is collected in a sludge tank of a sludge collector.

Further, the cross bit used at that time is as follows:
A downward jet port and an upward jet port are provided,
A long groove is formed in a valley between the chips, and the cross bit projects approximately 20 mm from the ring bit.

An apparatus according to the present invention comprises a percussion drill, a double pipe rod mounted on the percussion drill head via a cleaning swivel, and an inner pipe tip and an outer pipe tip of the double pipe rod. A cross bit and a ring bit, a sludge tank having an open top surface at a lower portion, and a casing at an upper portion thereof. A filter is housed in the casing, and an exhaust port of the filter protrudes from the casing. A sludge collecting device provided with a port, and a compressed air pipe from the compressor is communicated to the inner tube through the cleaning swivel, and the outer tube passes through the cleaning swivel and communicates with the sludge inflow port of the sludge collecting device via a pipeline. From the suction blower to the exhaust port of the filter And butterflies.

[0007] The cross bit of the present invention is provided with a downward spout and an upward spout.
A long groove is formed in a valley between chips.

[0008]

Since the percussion drill head applies impact and rotation to the bit, the drilling speed is faster than in the case of the conventional rotation alone, and the sludge sampling efficiency is improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of an apparatus showing one embodiment of the present invention, FIG. 2 is a plan view of a cross bit showing one embodiment of the present invention, FIG. 3 is a front view of the same, and FIG. Sectional view,
FIG. 5 is a sectional view taken along line B-O in FIG.

In the figure, 100 is a percussion drill head, 200 is a cleaning swivel, 310 is an inner tube, 320 is an outer tube, 330 is a cross bit, 340 is a ring bit, 600 is a sludge collector, 400 is a compressor, and 500 is a suction blower. It is.

The inner tube 310 and the outer tube 3 of the double tube rod 300
Reference numeral 20 is attached to the percussion drill head 100 via a cleaning swivel 200. Inner tube 310
Is connected to the compressor 400 via a line 211 from a port 210 of the cleaning swivel 200.
Further, the compressor 400 is connected to a lower end of a cylinder 631 attached below the filter 630 incorporated in the sludge collector 600 via a pipe 410,
By operating the cylinder 631 and striking the filter 630, clogging of the filter 630 is prevented. This cylinder 631 is
It acts as a knocker that operates with pressure from the air.

The sludge collecting device 600 is a sludge tank 6
A casing 620 is mounted on the upper surface of the filter 10, and a filter 630 is built in the casing 620, and an exhaust port 622 of the filter 630 protrudes from the upper surface of the casing 620. The casing 620 is provided with a sludge inflow port 623, and the sludge inflow port 623 is connected to the port 22 of the cleaning swivel 200.
0 and communicates with a gap 350 between the inner and outer pipes via a pipe 222. The exhaust port 622 communicates with the suction blower 500 via a pipe 570.

As shown in FIGS. 2 and 4, the cross bit 330 screwed to the tip of the inner tube 310 has
1 are drilled, and four upward jet ports 332 are drilled as shown in FIGS.
In the valley between 33, a long groove 3 to improve the flow of fluid
34 is engraved. Reference numeral 335 denotes a bit body. A female screw 336 to which the inner pipe 320 is screwed is screwed to the bit body 335, and an ejection port 337 is provided at the axis. The cross bit 330 is, as shown in FIG.
Although it protruded from 0, the protruding length was set to about 20 mm according to the result of the experiment.

To carry out sludge sampling with the apparatus of the present invention, first, the compressor 400 and the suction blower 5 are used.
00, the percussion drill head 100 is started, and the double pipe 300 is hit against the ground to feed. The cross bit 330 and the ring bit 340 at the tip of the double pipe 300 are turned on.
Is hit and rotated to excavate the ground, so that the compressed air passing through the inner pipe 310
31, 332, 337, and the excavated sludge is sucked upward by the suction blower 500 from the gap 350 between the inner and outer pipes, passes through the pipe 222, and passes through the sludge tank 610.
Is stored in

The dust generated from the sludge is filtered by a filter 6.
The suction blower sucks clean air because it is attached to and collected by the suction blower 30. Also, since the cylinder 630 attached below the filter 630 hits the filter 630, dust adhering to the filter 630 falls into the lower sludge tank 610 without being clogged and is collected.

[0016]

According to the present invention described in detail above, the drilling efficiency is much higher than that of the conventional rotary type sludge sampling, and the sampling efficiency is improved. In addition, when bits are used as in the second and fourth inventions, bit clogging is reduced, and the efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of an apparatus showing an embodiment of the present invention.

FIG. 2 is a plan view of a cross bit showing one embodiment of the present invention.

FIG. 3 is a plan view of a cross bit showing one embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a sectional view taken along the line B-O in FIG. 2;

[Explanation of symbols]

 Reference Signs List 100 Percussion drill head 200 Cleaning swivel 210, 220 Port 211, 222 Pipe line 300 Double pipe rod 310 Inner pipe 320 Outer pipe 330 Cross bit 331, 332, 337 Spout 333 Chip 334 Groove 335 Bit body 336 Female screw 400 Compressor 500 Suction Blower 410, 510 Pipeline 600 Sludge collector 610 Sludge tank 620 Casing 622 Exhaust port 623 Sludge inflow port 630 Filter 631 Cylinder (knocker)

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E21B 49/00 E21B 21/00

Claims (4)

(57) [Claims] 1. A double pipe rod is mounted on a percussion drill head via a cleaning swivel, and a cross bit and a ring bit are screwed to the tips of the inner and outer pipes, respectively, and pressurized air is blown into the inner pipe from the cleaning swivel. And, while sucking through a sludge collecting device from a gap between the inner tube and the outer tube with a suction blower, the percussion drill head applies impact and rotation to the cross bit and the ring bit to feed the sludge collecting device. A sludge sampling method using a percussion drill, which collects sludge in a sludge tank. 2. The cross bit is provided with a downward ejection port and an upward ejection port, a long groove is formed between valleys between chips, and the cross bit projects approximately 20 mm from a ring bit. A sludge sampling method using a percussion drill according to claim 1. 3. A percussion drill, a double pipe rod attached to the percussion drill head via a cleaning swivel, and a cross bit screwed to an inner pipe tip and an outer pipe tip of the double pipe rod, respectively. And a ring bit, a sludge tank having an upper surface open at a lower portion, and a casing at an upper portion thereof. A filter is accommodated in the casing, and an exhaust port of the filter projects from the casing, and an inflow port of the sludge is provided. Provided with a provided sludge collector, a compressed air pipe from the compressor is communicated to the inner pipe via the cleaning swivel, from the outer pipe through the cleaning swivel, is communicated by pipe to the sludge inflow port of the sludge collector, The suction blower is connected to the exhaust port of the filter by a pipeline. Sludge sampling device according to the percussion drill. 4. The cross bit includes a downwardly directed ejection port,
4. The sludge sampling apparatus according to claim 3, wherein an upward ejection port is provided, and a long groove is formed in a valley between the chips.