CN116291424A - Drilling sampling device for geotechnical engineering investigation - Google Patents
Drilling sampling device for geotechnical engineering investigation Download PDFInfo
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- CN116291424A CN116291424A CN202310556177.9A CN202310556177A CN116291424A CN 116291424 A CN116291424 A CN 116291424A CN 202310556177 A CN202310556177 A CN 202310556177A CN 116291424 A CN116291424 A CN 116291424A
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- 238000005070 sampling Methods 0.000 title claims abstract description 209
- 238000005553 drilling Methods 0.000 title claims abstract description 73
- 238000011835 investigation Methods 0.000 title claims abstract description 20
- 230000000903 blocking effect Effects 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000007790 scraping Methods 0.000 claims description 19
- 239000012528 membrane Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 40
- 239000002689 soil Substances 0.000 abstract description 36
- 238000000034 method Methods 0.000 abstract description 29
- 230000008569 process Effects 0.000 abstract description 20
- 230000000630 rising effect Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 12
- 230000007246 mechanism Effects 0.000 description 9
- 230000002745 absorbent Effects 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 4
- 238000006424 Flood reaction Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
- E21B49/06—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil using side-wall drilling tools pressing or scrapers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Soil Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention belongs to the technical field of drilling equipment, in particular to a drilling sampling device for geotechnical engineering investigation, which comprises a drill bit, wherein a sampling rod is connected with the upper end of the drill bit in a threaded manner; the upper end of the sampling rod is connected with a drill rod through threads; the lower end of the electric telescopic rod is fixedly connected with a blocking block, and the blocking block is in sliding sealing connection with the inner side of the sampling rod; sampling ports are circumferentially and uniformly distributed on the surface of the sampling rod at positions close to the plugging block; in the drilling process, the plugging block is aligned with the sampling port, when the sampling rod reaches the core position of the target depth, the electric telescopic rod is controlled to shrink, the plugging block is driven to move upwards and the sampling port is opened, the drilling machine drives the sampling rod to rotate, rock soil in drilling enters the sampling rod through the sampling port, the sampling port is plugged again, external rock soil in the rising process of the device is prevented from entering the sampling rod, the sample is polluted, and the accuracy and precision of core sampling are improved.
Description
Technical Field
The invention belongs to the technical field of drilling equipment, and particularly relates to a drilling sampling device for geotechnical engineering investigation.
Background
In the engineering investigation process, the core needs to be sampled to analyze the local geological condition, usually a drill rod with a sampler is drilled into the ground by a drilling machine, the rock and soil at the target core is sampled, and then the drill rod and the sampler are taken out to obtain a core sample, and the components of the sample are analyzed.
The Chinese patent with publication number of CN109488232A discloses a rod taking mechanism for a core sampling drilling machine, which comprises a lifting mechanism, a main grabbing shaft posture changing mechanism and a manipulator grabbing mechanism, wherein the lifting mechanism is used for assisting in lifting or lowering a movable slide block on a guide rail; the grabbing main shaft gesture changing mechanism is used for assisting in changing the operation angle of the corner connecting block and the grabbing main shaft; the manipulator grabbing mechanism is used for assisting the tail end manipulator to automatically and alternately grab more than two rod pieces with different sizes from the rod storage box. By applying the technical scheme of the invention, the rod taking mechanism is arranged on the core sampling drilling machine through the drilling machine mast connecting pair, and is convenient to assemble; the rod taking mechanism can realize alternate automatic grabbing of two or more rod pieces (such as drill rods, sleeves and the like) with different sizes, automatically installs the rod pieces in the rod storage box at an inclined or vertical power head or dismantles the rod pieces at the power head into the rod storage box, reduces the labor intensity of workers, and greatly improves the construction efficiency and the construction safety.
With respect to the above-described existing related art, the inventors consider that the following drawbacks often exist: in the prior art, a sampling port of a core drilling sampling device is usually set to be in an open state, in the drilling process, the sampling device does not reach the target depth yet, and external rock and soil enter the device in advance through the sampling port, so that a core sample with the target depth cannot be accurately obtained, and the problem of lower sampling precision exists.
Therefore, the invention provides a drilling sampling device for geotechnical engineering investigation.
Disclosure of Invention
In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved.
The technical scheme adopted by the invention is as follows: the invention relates to a drilling sampling device for geotechnical engineering investigation, which comprises:
the upper end of the drill bit is connected with a sampling rod in a threaded manner; the upper end of the sampling rod is connected with a drill rod through threads; the sampling rod and the drill rod are both arranged in a hollow structure; the upper end of the sampling rod is in a closed state, and the lower end of the sampling rod is in an open state;
the electric telescopic rod is fixedly connected to the inside of the upper end of the sampling rod; the lower end of the electric telescopic rod is fixedly connected with a blocking block, and the blocking block is in sliding sealing connection with the inner side of the sampling rod;
the sampling ports are provided with a group of sampling ports, and the circumference of the sampling ports is uniformly distributed on the surface of the sampling rod at the position close to the plugging block;
in the prior art, a sampling port of a core drilling sampling device is usually set to be in an open state, and in the drilling process, the sampling device does not reach a target depth yet, and external rock and soil enter the device in advance through the sampling port, so that a core sample with the target depth cannot be accurately obtained, and the problem of lower sampling precision exists; at the moment, the electric telescopic rod and the plugging block are arranged, the plugging block is aligned with the sampling port and plugs the sampling port in the drilling process, when the sampling rod reaches a core of a target depth, the electric telescopic rod is controlled to shrink to drive the plugging block to move upwards and open the sampling port, at the moment, the drilling machine on the ground drives the drilling rod, the sampling rod and the drill bit to rotate, rock soil in the drilling well enters the sampling rod through the sampling port (the lower end of the sampling rod is plugged by the drill bit), the electric telescopic rod drives the plugging block to descend, and the sampling port is plugged again, so that the sampling rod is sealed, the problem that external rock soil enters the sampling rod in the rising process of the device and pollutes a sample is solved, and the accuracy and precision of core sampling are improved.
Preferably, the inside of the sampling port is provided with a scraping blade; through setting up the doctor-bar, the sampling rod is at the rotation in-process, and the rock soil on the drilling lateral wall can be scraped to the doctor-bar, improves the acquisition efficiency of rock soil to the doctor-bar can also play the guide effect, will scrape the rock soil of taking off along the leading-in sampling connection inside of doctor-bar surface, improves the collection efficiency of rock soil sample.
Preferably, the scraping blade is rotationally connected with the sampling port through a rotary pin, and a torsion spring is arranged between the rotary pin and the sampling port; the lower side of the plugging block is fixedly connected with a mounting column; a group of sleeves are uniformly distributed on the surface of the mounting column; a push rod is connected inside the sleeve in a sliding way; a compression spring is fixedly connected between the push rod and the mounting column; the bottom of the sampling port is provided with a chamfer; the doctor-bar is not outstanding in the sample pole surface all the time, the doctor-bar is accomodate inside the sample connection under the normal condition, can prevent to creep into the in-process doctor-bar and be damaged, can also reduce the resistance that drills into, after reaching the target degree of depth, electric telescopic handle drives the shutoff piece and rises, and then the push rod aligns with the sample connection, the pressure spring promotes the push rod and slides in the sleeve pipe inside, and then the push rod is outwards ejecting with the doctor-bar, make the doctor-bar outstanding in the sample pole surface and can scrape the rock soil, collect the sample after, the shutoff piece moves down and with the shutoff of sample connection, the push rod descends along the chamfer and reentrants sleeve pipe inside this moment, the doctor-bar then reentrants sample connection inside under the effect of torsional spring.
Preferably, a stop block is fixedly connected in the sampling port; through setting up the dog, can carry out spacingly to the doctor-bar, prevent that the outside turned angle of doctor-bar from being too big to lead to the problem with the torsional spring damage, the dog can also support the doctor-bar when scraping the ground simultaneously, prevents that the doctor-bar from damaging.
Preferably, one end of the push rod far away from the mounting column is fixedly connected with a pair of support plates; a central shaft is fixedly connected between the pair of support plates; the outer side of the central shaft is rotationally connected with a guide wheel, and the guide wheel is attached to the inner side of the sampling rod; through setting up the guide pulley, the in-process of shutoff piece up-and-down motion, the guide pulley can roll at the inboard surface of sampling rod to reduce the wearing and tearing condition, and the setting of guide pulley can be convenient for the push rod through chamfer department, improves the smoothness nature of this device operation.
Preferably, a pair of elastic rings are arranged on the outer side of the sampling rod, and the sampling port is positioned between the pair of elastic rings; a pair of corrugated elastic folding films are fixedly connected between the inner side of the elastic ring and the sampling rod; the elastic ring, the folding membrane and the sampling rod form an air cavity, and a pair of air cavities are mutually communicated through a pipeline; an air pipe and a liquid pipe are arranged in the sampling rod; one end of the air pipe is communicated with the air cavity, and the other end of the air pipe penetrates through the interior of the drill rod and is communicated with an external air source; one end of the liquid pipe extends to the surface of the sampling rod between the pair of elastic rings, and the other end of the liquid pipe penetrates through the inside of the drill rod and is communicated with an external negative pressure pump; during drilling, drilling fluid (with the functions of lubricating, reducing abrasion, bringing out rock scraps and the like) is generally required to be injected into a well, air is required to be filled into the air cavity through an air source and an air pipe before sampling, so that the folded films are stretched outwards to expand, a pair of elastic ring supports are deformed and pressed on the surface of the side wall of the well, a relatively independent cavity is formed among the well wall, a sampling rod and two pairs of folded films, the drilling fluid in the cavity is pumped out through a negative pressure pump and a liquid pipe, then sample collection work is performed, the problem that a large amount of drilling fluid floods into the inside of the sampling rod after a sampling port is opened, the sample capacity is reduced is solved, and the pollution of the drilling fluid to a sample is reduced.
Preferably, an annular groove is formed in the outer side of the sampling rod and close to the elastic ring; the elastic ring and the folding membrane are both positioned in the annular groove; through setting up the ring channel, elastic ring and folding membrane are accomodate inside the ring channel under the normal condition, can prevent to creep into in-process elastic ring and folding membrane and be damaged to reduce the resistance of boring.
Preferably, the outer side surface of the elastic ring is coated with a wear-resistant coating; after the elastic ring is pressed on the surface of the well wall, the sampling rod can drive the elastic ring to rotate together, and the wear resistance of the elastic ring can be improved and the service life of the elastic ring can be prolonged by arranging the wear-resistant coating.
Preferably, the electric telescopic rod is a multi-stage telescopic rod; the expansion range of multistage telescopic link is wider, promotes this device to ground after, pulls down the drill bit from the sampling rod, and then control electric telescopic handle extension, outwards releases the rock soil sample in the sampling rod through the shutoff piece, realizes the quick recovery of sample, need not to adopt the mode of shock or mud washing.
Preferably, a group of elastic pads are uniformly distributed on the circumference of the surface of the guide wheel; an elastic water absorption block is fixedly connected in a cavity formed between the elastic pad and the guide wheel; a gap is formed in the middle of the elastic pad; a guide hole is formed between the inner side of the guide wheel and the water absorption block; after pushing out the sample, need adopt clear water to wash inside the sample pole to use next time, constantly flexible through control electric telescopic handle in the cleaning process, thereby make the shutoff piece scrape the inboard of wiping the sample pole, and constantly release abluent sewage outwards, improve cleaning efficiency, the guide pulley also constantly rotates at the inboard surface of sample pole, water can get into inside the elastic pad through the breach and be absorbed by the water absorption piece, when the elastic pad rotates to the sample pole surface, the breach is shutoff by the sample pole, and the water absorption piece receives the extrusion, the water that is extruded in the water absorption piece washes the gap between guide pulley inboard and the center pin through the guide hole (this position is the dead angle, ordinary water washes and is difficult to the sanitize), the remaining ground in clearance gap, thereby improve the rotation efficiency of the follow-up during operation of guide pulley.
The beneficial effects of the invention are as follows:
1. according to the drilling sampling device for geotechnical engineering investigation, the electric telescopic rod and the plugging block are arranged, in the drilling process, the plugging block is aligned with the sampling port and plugs the sampling port, when the sampling rod reaches a core with a target depth, the electric telescopic rod is controlled to shrink to drive the plugging block to move upwards and open the sampling port, at the moment, the drilling rod, the sampling rod and the drill bit are driven to rotate by the drilling machine on the ground, then rock and soil in drilling enters the sampling rod through the sampling port, the electric telescopic rod drives the plugging block to descend, and the sampling port is plugged again, so that the sampling rod is sealed, the problem that external rock and soil enter the sampling rod in the rising process of the device pollute the sample is prevented, and the accuracy and precision of sampling are improved.
2. According to the drilling and sampling device for geotechnical engineering investigation, the scraping blade is arranged, the scraping blade can scrape the rock and soil on the side wall of the drilling well in the rotation process of the sampling rod, so that the acquisition efficiency of the rock and soil is improved, the scraping blade can also play a guiding role, the scraped rock and soil is guided into the sampling port along the surface of the scraping blade, and the collection efficiency of a rock and soil sample is improved.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a cross-sectional view of a sampling wand of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at B;
FIG. 5 is an enlarged view of a portion of FIG. 4 at C;
FIG. 6 is a cross-sectional view of a guide wheel of the present invention.
In the figure: 1. a drill bit; 2. a sampling rod; 3. a drill rod; 4. an electric telescopic rod; 5. a block; 6. a sampling port; 7. a wiper blade; 8. a rotary pin; 9. a mounting column; 10. a sleeve; 11. a push rod; 12. a pressure spring; 13. a stop block; 14. a central shaft; 15. a guide wheel; 16. an elastic ring; 17. folding the film; 18. an air pipe; 19. a liquid pipe; 20. an annular groove; 21. an elastic pad; 22. a water absorption block; 23. a notch; 24. and (5) a guide hole.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Embodiment one:
as shown in fig. 1 to 5, a drilling and sampling device for geotechnical engineering investigation according to an embodiment of the present invention includes:
the drill bit 1, the upper end of the drill bit 1 is connected with a sampling rod 2 through threads; the upper end of the sampling rod 2 is connected with a drill rod 3 through threads; the sampling rod 2 and the drill rod 3 are both arranged in a hollow structure; the upper end of the sampling rod 2 is in a closed state, and the lower end of the sampling rod is in an open state;
the electric telescopic rod 4 is fixedly connected to the inside of the upper end of the sampling rod 2; the lower end of the electric telescopic rod 4 is fixedly connected with a blocking block 5, and the blocking block 5 is in sliding sealing connection with the inner side of the sampling rod 2;
the sampling ports 6 are provided with a group of sampling ports 6, and the sampling ports are circumferentially and uniformly distributed on the surface of the sampling rod 2 at the position close to the plugging block 5;
in the prior art, a sampling port 6 of a core drilling sampling device is usually set to be in an open state, and in the drilling process, the sampling device does not reach a target depth yet, and external rock and soil enter the device in advance through the sampling port 6, so that a core sample with the target depth cannot be accurately obtained, and the problem of lower sampling precision exists; at this time, in the drilling process, the electric telescopic rod 4 and the plugging block 5 are arranged, the plugging block 5 is aligned with the sampling port 6 and plugs the sampling port 6, when the sampling rod 2 reaches a core of a target depth, the electric telescopic rod 4 is controlled to shrink to drive the plugging block 5 to move upwards and open the sampling port 6, at this time, the drilling machine on the ground drives the drill rod 3, the sampling rod 2 and the drill bit 1 to rotate, rock in a drilling well enters the sampling rod 2 through the sampling port 6 (the lower end of the sampling rod 2 is plugged by the drill bit 1), and then the electric telescopic rod 4 drives the plugging block 5 to descend and re-plug the sampling port 6, so that the sampling rod 2 is sealed, the problem that external rock enters the inside of the sampling rod 2 in the ascending process of the device and pollutes a sample is prevented, and the accuracy and precision of core sampling are improved.
The inside of the sampling port 6 is provided with a scraping blade 7; through setting up doctor-bar 7, sampling rod 2 is at the rotation in-process, and the rock soil on the drilling lateral wall can be scraped to doctor-bar 7, improves the acquisition efficiency of rock soil to doctor-bar 7 can also play the guide effect, will scrape the rock soil of taking off along inside the leading-in sampling connection 6 of doctor-bar 7 surface, improves the collection efficiency of rock soil sample.
The scraping blade 7 is rotationally connected with the sampling port 6 through a rotary pin 8, and a torsion spring is arranged between the rotary pin 8 and the sampling port 6; the lower side of the plugging block 5 is fixedly connected with a mounting column 9; a group of sleeves 10 are uniformly distributed on the surface of the mounting column 9; a push rod 11 is connected inside the sleeve 10 in a sliding manner; a pressure spring 12 is fixedly connected between the push rod 11 and the mounting column 9; the bottom of the sampling port 6 is provided with a chamfer; the doctor-bar 7 is not outstanding in sample rod 2 surface all the time, the doctor-bar 7 is accomodate inside sample connection 6 under the normal condition, can prevent to creep into in-process doctor-bar 7 and be damaged, can also reduce the resistance of creep into, after reaching the target degree of depth, electric telescopic handle 4 drives shutoff piece 5 and rises, and then push rod 11 aligns with sample connection 6, pressure spring 12 promotes push rod 11 and slides in sleeve pipe 10 inside, and then push rod 11 is outwards ejecting with doctor-bar 7, make doctor-bar 7 outstanding in sample rod 2 surface and can scrape the rock soil, collect the sample back, shutoff piece 5 downward movement and with sample connection 6 shutoff, push rod 11 descends along the chamfer and reentrantly inside sleeve pipe 10 this moment, doctor-bar 7 then reentrantly is inside sample connection 6 under the effect of torsional spring.
A stop block 13 is fixedly connected inside the sampling port 6; through setting up dog 13, can carry out spacingly to doctor-bar 7, prevent that doctor-bar 7 outside turned angle from being too big to lead to the problem with the torsional spring damage, doctor-bar 7 can also support doctor-bar 7 when scraping the ground simultaneously, prevents that doctor-bar 7 from damaging.
One end of the push rod 11, which is far away from the mounting column 9, is fixedly connected with a pair of support plates; a central shaft 14 is fixedly connected between the pair of support plates; the outer side of the central shaft 14 is rotatably connected with a guide wheel 15, and the guide wheel 15 is attached to the inner side of the sampling rod 2; through setting up guide pulley 15, the in-process of shutoff piece 5 up-and-down motion, guide pulley 15 can roll at the inboard surface of sampling rod 2 to reduce the wearing and tearing condition, and the setting up of guide pulley 15 can be convenient for push rod 11 through chamfer department, improves the smoothness nature of this device operation.
A pair of elastic rings 16 are arranged on the outer side of the sampling rod 2, and the sampling port 6 is positioned between the pair of elastic rings 16; a pair of corrugated and elastic folding films 17 are fixedly connected between the inner side of the elastic ring 16 and the sampling rod 2; the elastic ring 16, the folding membrane 17 and the sampling rod 2 form an air cavity, and a pair of air cavities are communicated with each other through a pipeline; an air pipe 18 and a liquid pipe 19 are arranged in the sampling rod 2; one end of the air pipe 18 is communicated with the air cavity, and the other end of the air pipe passes through the interior of the drill rod 3 and is communicated with an external air source; one end of the liquid pipe 19 extends to the surface of the sampling rod 2 between the pair of elastic rings 16, and the other end of the liquid pipe passes through the inside of the drill rod 3 and is communicated with an external negative pressure pump; during drilling, drilling fluid (with lubrication, abrasion reduction, detritus taking out and the like) is generally required to be injected into a well (in the prior art), at this time, before sampling, air is required to be filled into the air cavity through an air source and an air pipe 18, so that a folded membrane 17 is stretched and expanded outwards, a pair of elastic rings 16 are stretched and deformed and are tightly pressed on the surface of the side wall of the well, a relatively independent cavity is formed among the well wall, a sampling rod 2 and two pairs of folded membranes 17, the drilling fluid in the cavity is pumped out through a negative pressure pump and a liquid pipe 19, then sample collection work is performed, and the problem that the sample capacity is reduced due to the fact that a large amount of drilling fluid floods into the sampling rod 2 after a sampling port 6 is opened is solved, and the pollution of the drilling fluid to a sample is reduced.
An annular groove 20 is formed in the outer side of the sampling rod 2 and close to the elastic ring 16; the elastic ring 16 and the folding membrane 17 are both positioned inside the annular groove 20; by providing the annular groove 20, the elastic ring 16 and the folding membrane 17 are normally accommodated inside the annular groove 20, and the elastic ring 16 and the folding membrane 17 can be prevented from being damaged during drilling, and the resistance to drilling can be reduced.
The outer side surface of the elastic ring 16 is coated with a wear-resistant coating; after the elastic ring 16 is pressed on the surface of the well wall, the sampling rod 2 can drive the elastic ring 16 to rotate together, and the wear resistance of the elastic ring 16 can be improved and the service life of the elastic ring 16 can be prolonged by arranging the wear-resistant coating.
The electric telescopic rod 4 is a multi-stage telescopic rod; the expansion range of multistage telescopic link is wider, promotes this device to ground after, pulls down drill bit 1 from sampling rod 2, and then control electric telescopic handle 4 extension, outwards releases the rock soil sample in the sampling rod 2 through shutoff piece 5, realizes the quick recovery of sample, need not to adopt the mode of shock or mud washing.
Embodiment two:
as shown in fig. 6, in comparative example one, another embodiment of the present invention is: a group of elastic pads 21 are uniformly distributed on the circumference of the surface of the guide wheel 15; an elastic water absorption block 22 is fixedly connected in a cavity formed between the elastic pad 21 and the guide wheel 15; a notch 23 is formed in the middle of the elastic pad 21; a guide hole 24 is formed between the inner side of the guide wheel 15 and the water absorption block 22; after pushing out the sample, need adopt clear water to wash sample pole 2 inside to use next time, constantly flexible through control electric telescopic handle 4 in the cleaning process, thereby make shutoff piece 5 scrape the inboard of sample pole 2, and constantly release abluent sewage outwards, improve cleaning efficiency, simultaneously the guide pulley 15 also constantly rotates at sample pole 2 inboard surface, water can get into inside the elastic pad 21 through breach 23 and by the absorbent block 22 absorption, when elastic pad 21 rotates to sample pole 2 surface, breach 23 is shutoff by sample pole 2, and absorbent block 22 receives the extrusion, the water that is extruded in the absorbent block 22 washes the gap (this position is the dead angle between guide pulley 15 inboard and the center pin 14 through guide hole 24, ordinary water washes and is difficult to wash clean), the rock and soil of remaining in the clearance gap, thereby the rotational efficiency of the follow-up during operation of guide pulley 15 improves.
Working principle: through setting up electric telescopic rod 4 and shutoff piece 5, in the drilling process, shutoff piece 5 aligns with sampling port 6 and blocks off sampling port 6, when sampling rod 2 reaches the rock core department of target depth, through controlling electric telescopic rod 4 shrink, drive shutoff piece 5 upward motion and open sampling port 6, drive drilling rod 3 through subaerial rig at this moment, sampling rod 2 and drill bit 1 rotate, then rock soil in the drilling gets into inside sampling rod 2 through sampling port 6 (sampling rod 2 lower extreme is blocked by drill bit 1), then drive shutoff piece 5 through electric telescopic rod 4 descends, and block off sampling port 6 again, thereby seal sampling rod 2, prevent the device in-process external rock soil from getting into inside sampling rod 2, and cause the problem of pollution to the sample, improve rock core sampling accuracy and precision; through setting up doctor-bar 7, sampling rod 2 is in the rotation in-process, and doctor-bar 7 can scrape the rock soil on the drilling lateral wall, improves the acquisition efficiency of rock soil to doctor-bar 7 can also play the guide effect, will scrape the rock soil of getting down along doctor-bar 7 surface introduction sampling port 6 inside, improves the collection efficiency of rock soil sample; the scraping blade 7 does not always protrude out of the surface of the sampling rod 2, the scraping blade 7 is contained in the sampling port 6 under normal conditions, the scraping blade 7 can be prevented from being damaged in the drilling process, drilling resistance can be reduced, after the target depth is reached, the electric telescopic rod 4 drives the plugging block 5 to ascend, the push rod 11 is aligned with the sampling port 6, the pressure spring 12 pushes the push rod 11 to slide in the sleeve 10, the push rod 11 ejects the scraping blade 7 outwards, the scraping blade 7 protrudes out of the surface of the sampling rod 2 and can scrape rock and soil, after samples are collected, the plugging block 5 moves downwards and plugs the sampling port 6, at the moment, the push rod 11 descends along a chamfer and is retracted into the sleeve 10 again, and the scraping blade 7 is retracted into the sampling port 6 again under the action of the torsion spring; through setting up dog 13, can carry out spacing to doctor-bar 7, prevent that doctor-bar 7 from outwards turning angle too big to lead to damaging the problem with the torsional spring, simultaneously doctor-bar 7 can also support doctor-bar 7 when scraping the ground, prevents that doctor-bar 7 from damaging; by arranging the guide wheel 15, the guide wheel 15 can roll on the inner side surface of the sampling rod 2 in the process of up-and-down movement of the plugging block 5, so that the abrasion condition is reduced, and the arrangement of the guide wheel 15 can facilitate the push rod 11 to pass through the chamfer, so that the running fluency of the device is improved; during drilling, drilling fluid (with lubrication, abrasion reduction, detritus taking out and other functions) is usually required to be injected into a well (in the prior art), at this time, before sampling, air is required to be filled into the air cavity through an air source and an air pipe 18, so that a folded membrane 17 is stretched and expanded outwards, a pair of elastic rings 16 are stretched and deformed and are tightly pressed on the surface of the side wall of the well, a relatively independent cavity is formed among the well wall, a sampling rod 2 and two pairs of folded membranes 17, the drilling fluid in the cavity is pumped out through a negative pressure pump and a liquid pipe 19, then sample collection work is performed, the problem that a large amount of drilling fluid floods into the sampling rod 2 after a sampling port 6 is opened, the sample capacity is reduced is solved, and the pollution of the drilling fluid to a sample is reduced; by providing the annular groove 20, the elastic ring 16 and the folding membrane 17 are normally accommodated inside the annular groove 20, so that the elastic ring 16 and the folding membrane 17 can be prevented from being damaged in the drilling process, and the drilling resistance can be reduced; after the elastic ring 16 is pressed on the surface of the well wall, the sampling rod 2 can drive the elastic ring 16 to rotate together, and the wear resistance of the elastic ring 16 can be improved and the service life of the elastic ring 16 can be prolonged by arranging the wear-resistant coating; the expansion range of the multi-stage expansion link is wider, after the device is lifted to the ground, the drill bit 1 is detached from the sampling rod 2, so that the electric expansion link 4 is controlled to be elongated, a rock-soil sample in the sampling rod 2 is pushed out through the plugging block 5, the sample is quickly recovered, and a vibration or slurry flushing mode is not needed; after pushing out the sample, need adopt clear water to wash sample pole 2 inside to use next time, constantly flexible through control electric telescopic handle 4 in the cleaning process, thereby make shutoff piece 5 scrape the inboard of sample pole 2, and constantly release abluent sewage outwards, improve cleaning efficiency, simultaneously the guide pulley 15 also constantly rotates at sample pole 2 inboard surface, water can get into inside the elastic pad 21 through breach 23 and by the absorbent block 22 absorption, when elastic pad 21 rotates to sample pole 2 surface, breach 23 is shutoff by sample pole 2, and absorbent block 22 receives the extrusion, the water that is extruded in the absorbent block 22 washes the gap (this position is the dead angle between guide pulley 15 inboard and the center pin 14 through guide hole 24, ordinary water washes and is difficult to wash clean), the rock and soil of remaining in the clearance gap, thereby the rotational efficiency of the follow-up during operation of guide pulley 15 improves.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.
Claims (10)
1. Drilling sampling device for geotechnical engineering investigation, its characterized in that: comprising the following steps:
the drill bit (1), the upper end of the drill bit (1) is connected with a sampling rod (2) through screw threads; the upper end of the sampling rod (2) is connected with a drill rod (3) through threads; the sampling rod (2) and the drill rod (3) are both arranged in a hollow structure; the upper end of the sampling rod (2) is in a closed state, and the lower end of the sampling rod is in an open state;
the electric telescopic rod (4) is fixedly connected to the inside of the upper end of the sampling rod (2); the lower end of the electric telescopic rod (4) is fixedly connected with a blocking block (5), and the blocking block (5) is in sliding sealing connection with the inner side of the sampling rod (2);
sampling port (6), sampling port (6) are provided with a set of to circumference equipartition is in the position that is close to shutoff piece (5) on sampling rod (2) surface.
2. A drilling and sampling device for geotechnical engineering investigation according to claim 1, wherein: the sampling port (6) is internally provided with a scraping blade (7).
3. A drilling and sampling device for geotechnical engineering investigation according to claim 2, wherein: the scraping blade (7) is rotationally connected with the sampling port (6) through a rotary pin (8), and a torsion spring is arranged between the rotary pin (8) and the sampling port (6); the lower side of the plugging block (5) is fixedly connected with a mounting column (9); a group of sleeves (10) are uniformly distributed on the surface of the mounting column (9); a push rod (11) is connected inside the sleeve (10) in a sliding manner; a compression spring (12) is fixedly connected between the push rod (11) and the mounting column (9); and a chamfer is arranged at the bottom of the sampling port (6).
4. A drilling and sampling device for geotechnical engineering investigation according to claim 3, wherein: and a stop block (13) is fixedly connected inside the sampling port (6).
5. A drilling and sampling device for geotechnical engineering investigation according to claim 3, wherein: one end of the push rod (11) far away from the mounting column (9) is fixedly connected with a pair of support plates; a central shaft (14) is fixedly connected between the pair of support plates; the outside of the central shaft (14) is rotationally connected with a guide wheel (15), and the guide wheel (15) is attached to the inner side of the sampling rod (2).
6. A drilling and sampling apparatus for geotechnical engineering investigation according to claim 5, wherein: a pair of elastic rings (16) are arranged on the outer side of the sampling rod (2), and the sampling port (6) is positioned between the pair of elastic rings (16); a pair of corrugated and elastic folding films (17) are fixedly connected between the inner side of the elastic ring (16) and the sampling rod (2); the elastic ring (16), the folding membrane (17) and the sampling rod (2) form an air cavity, and a pair of air cavities are mutually communicated through a pipeline; an air pipe (18) and a liquid pipe (19) are arranged in the sampling rod (2); one end of the air pipe (18) is communicated with the air cavity, and the other end of the air pipe passes through the interior of the drill rod (3) and is communicated with an external air source; one end of the liquid pipe (19) extends to the surface of the sampling rod (2) between the pair of elastic rings (16), and the other end of the liquid pipe passes through the inside of the drill rod (3) and is communicated with an external negative pressure pump.
7. A drilling and sampling apparatus for geotechnical engineering investigation according to claim 6, wherein: an annular groove (20) is formed in the outer side of the sampling rod (2) and close to the elastic ring (16); the elastic ring (16) and the folding membrane (17) are both positioned inside the annular groove (20).
8. A drilling and sampling apparatus for geotechnical engineering investigation according to claim 7, wherein: the outer side surface of the elastic ring (16) is coated with a wear-resistant coating.
9. A drilling and sampling device for geotechnical engineering investigation according to claim 1, wherein: the electric telescopic rod (4) is a multistage telescopic rod.
10. A drilling and sampling apparatus for geotechnical engineering investigation according to claim 5, wherein: a group of elastic pads (21) are uniformly distributed on the circumference of the surface of the guide wheel (15); an elastic water absorption block (22) is fixedly connected in a cavity formed between the elastic pad (21) and the guide wheel (15); a gap (23) is formed in the middle of the elastic pad (21); and a guide hole (24) is formed between the inner side of the guide wheel (15) and the water absorption block (22).
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| CN116698474A (en) * | 2023-08-03 | 2023-09-05 | 北京建工环境修复股份有限公司 | High-fidelity sampling device for soil in industrial contaminated site |
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| CN116291424B (en) | 2023-09-29 |
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