CN103226070A - Novel hydraulic piston sampling machine tool - Google Patents
Novel hydraulic piston sampling machine tool Download PDFInfo
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- CN103226070A CN103226070A CN2013101090335A CN201310109033A CN103226070A CN 103226070 A CN103226070 A CN 103226070A CN 2013101090335 A CN2013101090335 A CN 2013101090335A CN 201310109033 A CN201310109033 A CN 201310109033A CN 103226070 A CN103226070 A CN 103226070A
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
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Abstract
The invention discloses a novel hydraulic piston sampling machine tool. A piston drill bit is in screwed connection with the lower end of a hollow core rod. The upper end of the hollow core rod is in screwed connection with the lower end of an upper piston. The upper end of the upper piston is in screwed connection with the lower end of a main shaft. The main shaft is of a driving drill pipe structure which is in a hexagonal prism shape or flat. A torque transmission connector is arranged on the main shaft in a sleeved mode and can move in the axial direction of the main shaft relative to the main shaft. The torque transmission connector and the main shaft rotate synchronously together. The lower end of the torque transmission connector is in screwed connection with the upper end of a hydraulic cylinder body. The inner diameter of the torque transmission connector is larger than that of the hydraulic cylinder body. An inner cavity of the cylinder body is matched with the upper piston in a sliding and sealing mode. The lower end of the cylinder body is in screwed connection with the upper end of a movable piston. The lower end of the movable piston is in spline fit with the upper end of a taper sleeve, connected and limited through screws. The lower end of the taper sleeve is in spline fit with the upper end of an outer tube and connected and limited through screws. The lower end of the outer tube is in screwed connection with an outer drill bit. Static pressure sampling, static pressure + rotation sampling and impact sampling are achieved. The pumping effect of the bottom of a hole when a drill tool is lifted is eliminated. Hidden danger of dropping of samples when the drill tool is lifted is eliminated, and the novel hydraulic piston sampling machine tool has the advantages of being high in reliability of sampling and high in adaptability to formation conditions.
Description
Technical field
The present invention relates to a kind of in the river, river, lake, mooring basin district carry out the waters Sampling driller of geological sampling, geochemical exploration sampling, environmental sampling, the novel hydraulic sampling piston facility that particularly a kind of reliability is high.
Background technology
It is to obtain the sedimental effective ways of waters mud matter that piston bores, but there is following shortcoming in traditional piston brill:
1, creep into function singleness, mainly pour into the stratum by static pressure, change when running into formation condition, use will be restricted;
2, carry brill and be subjected to suction in the hole, pulling force is excessive;
3, do not have the heart protective apparatus structure, cause sample to come off easily.
Summary of the invention
At the deficiencies in the prior art, the object of the present invention is to provide a kind of sampled functions variation, carry the little and sample of pulling force when boring and be not easy the novel hydraulic sampling piston facility that come off from stopple coupon.
Technical scheme of the present invention is achieved in that novel hydraulic sampling piston facility, piston drill bit and the lower end screwed connection of hollow core bar, hollow core bar upper end and the screwed connection of upper piston lower end, upper piston upper end and main shaft lower end are with screwed connection, main shaft is hexagonal columnar or flat-shaped kelly structure, with respect to main shaft and can be on main shaft along the torsion pass fitting sleeve of main shaft axially-movable, torsion pass joint and main shaft rotate together synchronously, torsion pass joint lower end and cylinder body upper end screwed connection, the internal diameter of torsion pass joint greater than with the internal diameter of cylinder body, inner chamber of cylinder block cooperates with the upper piston slipper seal, cylinder body lower end and the upper end screwed connection of moving piston, moving piston lower end is with tapered sleeve upper end spline fitted and be connected spacing by screw, moving piston bush cooperates on the hollow core bar and with the slipper seal of hollow core bar, the tapered sleeve lower end is with outer tube upper end spline fitted and be connected spacing by screw, outer tube lower end and outer drill bit screwed connection, taper ball card chord position is in tapered sleeve, and be positioned on the spring under the moving piston, spring is positioned on the ball deck, ball deck and the screwed connection of tapered sleeve lower end, be enclosed within single action axle and the screwed connection of ball deck on the hollow core bar, adorn thrust bearing on the single action axle from top to bottom in turn, interior tube head and radial roller bearing, inner pipe joint is fixedlyed connected with sample hose, the sample hose inner chamber cooperates with the slipper seal of piston drill bit, in the axial step through hole of upper piston guiding valve and spring are installed, the upper end of spring is against on the guiding valve lower surface, the lower end of spring is against on the step surface of axial step through hole of upper piston, the top of axial step through hole, the aperture of middle part and bottom reduces successively, the axial mesopore of main shaft, the axial mesopore of axial step through hole and hollow core bar is fluid communication successively, the upper piston outer wall, form the airtight hydraulic cavities of exerting pressure between inboard wall of cylinder block and the moving piston upper surface three to moving piston, offer a hole with airtight hydraulic cavities fluid communication on the upper piston inwall that contacts with guiding valve, offer the hydraulic pressure plugging hole of the axial mesopore that is used for conducting axial step through hole and main shaft on the guiding valve.
Above-mentioned novel hydraulic sampling piston facility, offer C hole on the piston drill bit with the axial mesopore fluid communication of hollow core bar, offer the b hole with the conducting of sample hose cavity fluid on the hollow core bar, offer on the outer drill bit and outer tube wall and sample hose outer wall between the e hole of annular gap fluid communication.
Above-mentioned novel hydraulic sampling piston facility, the torsion pass upper end of joint is connected with impact head.
Above-mentioned novel hydraulic sampling piston facility, the impact head upper end is got drilling rod with the formula rope of removing and is connected.
Above-mentioned novel hydraulic sampling piston facility, main drive shaft upper end and drilling coupling screwed connection, main drive shaft upper end and drilling coupling all are positioned at the drilling rod that impact head or the formula rope of removing are got.
Above-mentioned novel hydraulic sampling piston facility, the piston drill bit outside surface that contacts with the sample hose inwall is provided with the twice O-ring seals.
Above-mentioned novel hydraulic sampling piston facility, the tapered sleeve outside surface that contacts with outer tube wall is provided with O-ring seals.
Above-mentioned novel hydraulic sampling piston facility, the moving piston that contacts with the hollow core rod outer surface is provided with the twice O-ring seals.
Above-mentioned novel hydraulic sampling piston facility, the axial step through-hole wall that contacts with the guiding valve outside surface is provided with the twice O-ring seals.
Above-mentioned novel hydraulic sampling piston facility, the upper piston outside surface that contacts with inboard wall of cylinder block is provided with the twice O-ring seals.
The invention has the beneficial effects as follows:
(1) the former hydraulic pressure piston brill of inventor drilling tool is three layers of tubular construction, and bit wall thickness is to power and drilling rod rigidity requirement height.The present invention will move on the hydraulic piston cylinder, is about to move on the original hydraulic piston drilling tool outer tube, becomes three layers of pipe into two layers of tubular construction, has effectively reduced bit wall thickness.
(2) adopt comprehensive boring principle cleaning bottom of hole to sampling spot before the sampling, replaced static pressure and pushed the mode that pours into, time saving and energy saving, improved sample rate.
(3) during sample drilling, when running into than hard interbedded layer, but the auxiliary nothing in hydraulic feed limit, limit feeds rotary drilling bits, drill bit is in cuts sth. askew into the mode of creeping into, can effectively overcome the obstruction of hard sandwich, also can be lowered to and have the outer drilling rod that impacts joint, become the internal layer drilling rod and be the hollow core bar, the auxiliary mode that imposes static pressure or surge pressure is taken a sample, and improves the adaptability of piston brill to the stratum.
(4) carry that the relative sample hose of outer basket glides automatically when boring, make drill bit bottom and top ventilation, eliminate suction force at the bottom of the hole, make simultaneously and block spring and skid off gathering, prevent that sample from coming off.
Therefore, the sampled functions variation of this novel hydraulic sampling piston facility has realized static pressure sampling, revolution sampling and has impacted sampling, has eliminated and has put forward when boring swabbing action at the bottom of the hole, eliminated to carry and bored the hidden danger that up-to-date style product come off, had sampling reliability height and the adaptable characteristics of formation condition.Can be according to sampling condition and formation condition, transform sampling technology can realize that static pressure creeps into, different sampling modes such as percussion drilling or rotary drilling, has eliminated simultaneously to carry and has bored the hidden danger that suction and sample come off.
Description of drawings
Fig. 1 is the structure principle chart of multifunction sampling drilling tool of the present invention.
Among Fig. 1: 1. piston drill bit, 2. block spring, 3. outer drill bit, 4. outer tube, 5. hollow core bar, 6. single action axle, 7. interior tube head, 8. ball deck, 9. tapered sleeve, 10. ball card frame, 11. moving pistons, 12. guiding valves, 13. upper piston, 14. cylinder bodies, 15. main drive shafts, 16. torsion pass joints, 17. impact head, 1.,
-steel ball, 2., 8.,
-O RunddichtringO, 3.-sample hose, 4.-radial roller bearing, 6.-thrust bearing, 5., 7., 9.,
-screw, 10.,
-spring,
-drilling coupling,
-formula the rope of removing is got drilling rod.
Embodiment
As shown in Figure 1, in present embodiment novel hydraulic sampling piston facility: piston drill bit 1 and hollow core bar 5 lower ends are with screwed connection, hollow core bar 5 upper ends and upper piston 13 lower end screwed connections, upper piston 13 upper ends and main shaft 15 lower end screwed connections, main shaft 15 is hexagonal columnar or flat-shaped kelly structure, also can be enclosed within along the torsion pass joint 16 of main shaft 15 axially-movables on the main shaft 15 with respect to main shaft 15, torsion pass joint 16 and main shaft 15 rotate together synchronously, torsion pass joint 16 lower ends and cylinder body 14 upper end screwed connections, the internal diameter of torsion pass joint 16 greater than with the internal diameter of cylinder body 14, cylinder body 14 inner chambers cooperate with upper piston 13 slipper seals, cylinder body 14 lower ends and the 11 upper end screwed connections of moving piston, moving piston 11 lower ends and tapered sleeve 9 upper end spline fitted are also passed through screw
Connect spacing, moving piston 11 is enclosed within on the hollow core bar 5 and with 5 slipper seals of hollow core bar and cooperates, tapered sleeve 9 lower ends are with outer tube 4 upper end spline fitted and 9. be connected spacing by screw, outer tube 4 lower ends and outer drill bit 3 screwed connections, taper ball card frame 10 is positioned at tapered sleeve 9, and be positioned under the moving piston 11 spring 10. on, 10. spring is positioned on the ball deck 8, ball deck 8 and tapered sleeve 9 lower end screwed connections, be enclosed within single action axle 6 and 8 screwed connections of ball deck on the hollow core bar 5, adorn thrust bearing in turn 6. from top to bottom on the single action axle 6, interior tube head 7 and radial roller bearing are 4., 3. inner pipe joint 7 fixedlys connected with sample hose, sample hose 3. inner chamber cooperates with 1 slipper seal of piston drill bit, in the axial step through hole of upper piston 13 guiding valve 12 and spring is installed
Spring
The upper end be against on guiding valve 12 lower surfaces spring
The lower end be against on the step surface of axial step through hole of upper piston 13, the top of axial step through hole, the aperture of middle part and bottom reduces successively, the axial mesopore of main shaft 15, the axial mesopore of axial step through hole and hollow core bar 5 is fluid communication successively, upper piston 13 outer walls, form the airtight hydraulic cavities of exerting pressure between cylinder body 14 inwalls and the moving piston 11 upper surface threes to moving piston 11, offer a hole with airtight hydraulic cavities fluid communication on upper piston 13 inwalls that contact with guiding valve 12, offer the hydraulic pressure plugging hole of the axial mesopore that is used for conducting axial step through hole and main shaft 15 on the guiding valve 12.
In addition, in present embodiment novel hydraulic sampling piston facility: offer C hole on the piston drill bit 1 with the axial mesopore fluid communication of hollow core bar 5, offer on the hollow core bar 5 and the 3. b hole of cavity fluid conducting of sample hose, offer on the outer drill bit 2 and the 3. e hole of the annular gap fluid communication between the outer wall of outer tube 4 inwalls and sample hose.Torsion pass joint 16 upper ends are connected with impact head 17, impact head 17 upper ends with remove the formula rope and get drilling rod
Connect main drive shaft 15 upper ends and drilling coupling
Screwed connection, main drive shaft 15 upper ends and drilling coupling
All be positioned at the impact head 17 or the formula rope of removing and get drilling rod
Axial mesopore in.With sample hose 3. piston drill bit 1 outside surface that contacts of inwall be provided with the twice O-ring seals 2., 8. tapered sleeve 9 outside surfaces that contact with outer tube 4 inwalls are provided with O-ring seals, the moving piston 11 that contacts with hollow core bar 5 outside surfaces is provided with the twice O-ring seals
The axial step through-hole wall that contacts with guiding valve 12 outside surfaces is provided with the twice O-ring seals
Upper piston 13 outside surfaces that contact with cylinder body 14 inwalls are provided with the twice O-ring seals
Main shaft 15 rotary torques can pass to piston drill bit 1 by upper piston 13 and hollow core bar 5, and washing fluid is transported to the bottom through the axial mesopore of main shaft 15, the axial mesopore of hydraulic pressure plugging hole, axial step through hole on the upper piston 13 and hollow core bar 5 on the guiding valve 12 successively.Main shaft 15 is a non-cylindrical, can be square axis, six square shafts or splined shaft; Main shaft 15 matches with torsion pass joint 16, makes torsion pass joint 16 and main shaft 15 rotate synchronously together; The rotary torque of main shaft 15 passes to outer drill bit 3 by torsion pass joint 16, realizes hydraulic pressurization simultaneously, auxiliary rotary drilling; Propose outer tube 4 relative tapered sleeves 9 downslides when boring.
3. inner pipe joint 7 is pegged graft with sample hose and with screw the two is fixed simultaneously.During pressurization, moving piston 11 pressurizes downwards, and it is descending to drive ball card frame 10, and this moment, the ball card unclamped, and 3. outer drill bit 2 and sample hose promote the descending stratum that pours at moving piston 11; Carry when boring, moving piston 11 moves on relatively, under the spring force effect, the ball kayser is tight, keep piston drill bit 1 static relatively in 3., prevent that sample is elongated, simultaneously at sample hose, outer tube 4 drives outer drill bit 2 and glides relatively, block spring 2 gatherings and protect the heart, at this moment, ventilate with drill bit top at the bottom of the hole, prevent suction, reduce pulling force and prevent that sample from coming off; During revolution, under bearing cooperated, interior pipe did not turn round, and reduced the sample wearing and tearing.
The novel hydraulic sampling piston facility of present embodiment can be realized multiple force mechanism sampling in specific operation process: hydraulic piston drill sampling, core bar formula piston drill sampling, revolution auxiliary hydraulic pressure piston drill sampling or hydraulic pressure and mechanical combination pressure sampling piston.
One, hydraulic piston drill sampling
1. and steel ball after installing as shown in Figure 1, steel ball when beginning to creep into
Do not throw in, open pumps water, the revolution cleaning bottom of hole creeps into, and washing fluid comes downwards to piston drill bit 1 and is divided into two-way through guiding valve 12, hollow core bar 5 center pits, and one the tunnel directly at the bottom of the flushing port of C hole; One the tunnel through b hole, radial roller bearing 4. and the annular gap of thrust bearing bearing clearance, outer tube 4 and sample hose 6. between 3., the e hole of outer drill bit 2, washes outer drill bit, and up to getting into predetermined hole depth, termination of pumping, shutdown stop cleaning bottom of hole and creep into.1. and steel ball drop into steel ball afterwards in turn
Rotary drilling bits is not opened pumps water, under hydraulic action, and guiding valve 12 compression springs
Upper piston a hole is exposed, and water under high pressure enters moving piston 11 tops, and it is descending to promote moving piston 11, forces steel ball
Unclamp, make that drilling tool is descending to be pressed into sampling, this moment, hollow core bar 5 was motionless, only played positioning piston drill bit 1;
Cylinder body 14 follows up synchronously when creeping into, when upper piston 13 relative motions are in torsion pass joint 16, because of torsion pass joint 16 inner diameters greater than cylinder body 14 inner diameters, water pressure release in the hydraulic cylinder, face of land Pump pressure meter pressure reduces, and plays and creeps into the effect of notifying that ends, promptly when water-aspirator pressure reduces suddenly, show that drilling tool has been pressed onto the position, termination of pumping is carried brill, is cored then.
After the pressure release, steel ball
Under 10. spring oppresses, be stuck on the hollow core bar 5, drilling tool is fixed, to carry when boring, outer tube 4 relative sample hoses are 3. to lower slider, make to block spring 2 exposures and draw in and protect the heart, make the drilling tool full communication between the higher and lower levels simultaneously, prevent that the drilling tool bottom from aspirating.
Two, revolution auxiliary hydraulic pressure piston bores
Pour in the drilling process at hydraulic pressure; when getting into than hard interbedded layer; can keep drilling tool not feed, only do cast, at this moment; drilling tool is under hydraulic coupling and turning power effect; drill hard interbedded layer easily, in the turning course, sample hose is 3. under single acting connector (single action axle 6, thrust bearing 6., interior tube head 7 and radial roller bearing general name 4.) protection; do not do revolution, prevent the sample that weares and teares.All the other processes are same.
Three, the core bar sampling piston bores
When not having water pump, water pump fault or using water pump inconvenience, can utilize the outer drilling rod of the in advance supporting formula that removes because of intemperance
Implement core bar formula piston drill sampling.Concrete operations are interior drilling rod to be made core bar hang, and utilize outer drilling rod pressurization.
Four, the combination pressure piston bores
Limited in one's ability in the water pump pump pressure, or failure cause can adopt hydraulic piston pressurization+outer drilling rod machinery pressurization combination when adding not upward pressure, improves drilling ability.
The foregoing description only is for the invention example clearly is described, and is not the qualification to the invention embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being amplified out thus or change still are among the protection domain of the invention claim.
Claims (10)
1. novel hydraulic sampling piston facility, it is characterized in that, piston drill bit (1) and hollow core bar (5) lower end screwed connection, hollow core bar (5) upper end and upper piston (13) lower end screwed connection, upper piston (13) upper end and main shaft (15) lower end are with screwed connection, main shaft (15) is hexagonal columnar or flat-shaped kelly structure, also can be enclosed within along the torsion pass joint (16) of main shaft (15) axially-movable on the main shaft (15) with respect to main shaft (15), torsion pass joint (16) and main shaft (15) rotate together synchronously, torsion pass joint (16) lower end and cylinder body (14) upper end screwed connection, the internal diameter of torsion pass joint (16) greater than with the internal diameter of cylinder body (14), cylinder body (14) inner chamber cooperates with upper piston (13) slipper seal, cylinder body (14) lower end and moving piston (11) upper end screwed connection, moving piston (11) lower end and tapered sleeve (9) upper end spline fitted are also passed through screw
Connect spacing, moving piston (11) is enclosed within hollow core bar (5) and upward and with hollow core bar (5) slipper seal cooperates, tapered sleeve (9) lower end is with outer tube (4) upper end spline fitted and be connected spacing by screw (9.), outer tube (4) lower end and outer drill bit (3) screwed connection, taper ball card frame (10) is positioned at tapered sleeve (9), and be positioned on the spring (10.) under the moving piston (11), spring (10.) is positioned on the ball deck (8), ball deck (8) and tapered sleeve (9) lower end screwed connection, be enclosed within single action axle (6) and ball deck (8) screwed connection on the hollow core bar (5), adorn thrust bearing (6.) on the single action axle (6) from top to bottom in turn, interior tube head (7) and radial roller bearing (4.), inner pipe joint (7) is fixedlyed connected with sample hose (3.), sample hose (3.) inner chamber cooperates with piston drill bit (1) slipper seal, and guiding valve (12) and spring are installed in the axial step through hole of upper piston (13)
Spring
The upper end be against on guiding valve (12) lower surface spring
The lower end be against on the step surface of axial step through hole of upper piston (13), the top of axial step through hole, the aperture of middle part and bottom reduces successively, the axial mesopore of main shaft (15), the axial mesopore of axial step through hole and hollow core bar (5) is fluid communication successively, upper piston (13) outer wall, form the airtight hydraulic cavities of exerting pressure between cylinder body (14) inwall and moving piston (11) the upper surface three to moving piston (11), offer a hole with airtight hydraulic cavities fluid communication on upper piston (13) inwall that contacts with guiding valve (12), offer the hydraulic pressure plugging hole of the axial mesopore that is used for conducting axial step through hole and main shaft (15) on the guiding valve (12).
2. novel hydraulic sampling piston facility according to claim 1, it is characterized in that, offer C hole on the piston drill bit (1) with the axial mesopore fluid communication of hollow core bar (5), offer the b hole with the conducting of sample hose (3.) cavity fluid on the hollow core bar (5), offer on the outer drill bit (2) and outer tube (4) inwall and sample hose (3.) outer wall between the e hole of annular gap fluid communication.
3. novel hydraulic sampling piston facility according to claim 2 is characterized in that, torsion pass joint (16) upper end is connected with impact head (17).
4. novel hydraulic sampling piston facility according to claim 3 is characterized in that, impact head (17) upper end with remove the formula rope and get drilling rod
Connect.
5. novel hydraulic sampling piston facility according to claim 4 is characterized in that, main drive shaft (15) upper end and drilling coupling
Screwed connection, main drive shaft (15) upper end and drilling coupling
All be positioned at the impact head (17) or the formula rope of removing and get drilling rod
Axial mesopore in.
6. according to each described novel hydraulic sampling piston facility of claim 1-5, it is characterized in that piston drill bit (1) outside surface that contacts with sample hose (3.) inwall is provided with twice O-ring seals (2.).
7. according to each described novel hydraulic sampling piston facility of claim 1-5, it is characterized in that tapered sleeve (9) outside surface that contacts with outer tube (4) inwall is provided with O-ring seals (8.).
8. according to each described novel hydraulic sampling piston facility of claim 1-5, it is characterized in that the moving piston (11) that contacts with hollow core bar (5) outside surface is provided with the twice O-ring seals
9. according to each described novel hydraulic sampling piston facility of claim 1-5, it is characterized in that the axial step through-hole wall that contacts with guiding valve (12) outside surface is provided with the twice O-ring seals
10. according to each described novel hydraulic sampling piston facility of claim 1-5, it is characterized in that upper piston (13) outside surface that contacts with cylinder body (14) inwall is provided with the twice O-ring seals
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|---|---|---|---|
| CN201310109033.5A CN103226070B (en) | 2013-03-29 | 2013-03-29 | Novel hydraulic piston sampling machine tool |
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| CN201310109033.5A CN103226070B (en) | 2013-03-29 | 2013-03-29 | Novel hydraulic piston sampling machine tool |
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| CN103226070B CN103226070B (en) | 2015-04-22 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106121636A (en) * | 2016-08-23 | 2016-11-16 | 唐山市金石超硬材料有限公司 | A kind of drilling tool inner tube assembly puts in place mechanism and the method for notifying of notifying |
| CN106153392A (en) * | 2015-04-10 | 2016-11-23 | 泰安市康宇医疗器械有限公司 | Breast milk pipette device and absorption breast milk method |
| CN106240672A (en) * | 2016-09-25 | 2016-12-21 | 羊丁 | A kind of roof drilling robot |
| CN108414272A (en) * | 2018-04-18 | 2018-08-17 | 安徽中疆环境科技有限公司 | A kind of contaminated soil sampler of pollution control |
| CN109458148A (en) * | 2018-12-24 | 2019-03-12 | 中铁二院工程集团有限责任公司 | Three-layer pipe impacts core bit |
| CN109778824A (en) * | 2019-03-13 | 2019-05-21 | 中交第四航务工程勘察设计院有限公司 | A kind of weak soil Sampling driller of end card formula |
| CN113029647A (en) * | 2021-03-01 | 2021-06-25 | 毛鲲 | Pavement drilling sampling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109458148A (en) * | 2018-12-24 | 2019-03-12 | 中铁二院工程集团有限责任公司 | Three-layer pipe impacts core bit |
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| CN109778824B (en) * | 2019-03-13 | 2024-04-19 | 中交第四航务工程勘察设计院有限公司 | Weak soil sampling drilling tool with end clamping piece |
| CN113029647A (en) * | 2021-03-01 | 2021-06-25 | 毛鲲 | Pavement drilling sampling device |
| CN113029647B (en) * | 2021-03-01 | 2022-07-05 | 毛鲲 | Pavement drilling sampling device |
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