CN117051903A - A construction engineering foundation pile detection device - Google Patents
A construction engineering foundation pile detection device Download PDFInfo
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- CN117051903A CN117051903A CN202311247682.1A CN202311247682A CN117051903A CN 117051903 A CN117051903 A CN 117051903A CN 202311247682 A CN202311247682 A CN 202311247682A CN 117051903 A CN117051903 A CN 117051903A
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- sampling
- foundation pile
- detection device
- pile detection
- drilling
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
本发明涉及相关技术领域，公开了一种建筑工程基桩检测装置，顶板通过取样机构带动沿滑槽进行上下移动，顶板的下表面设有取样电机，转盘上等角度开设有调节槽，调节槽内设有钻杆，通过控制钻杆的调节距离可以自由的控制需要取样的宽度，且在第一次钻孔的过程中，通过外筒上的钢齿可以在第一次钻孔的内壁形成凹凸不平的连接面，在调节钻杆位置的同时，对钢齿的位置进行调节，从而可以在第二次钻孔时在第二次钻孔的内壁形成凹凸不平的连接面，从而可以在回浇时，使回浇的混凝土可以与原有的基桩进行很好的结合，通过对基桩进行圆筒状取样同时使回浇的混凝土可以与原有的基桩进行很好的结合，从而可以减少采用钻芯法取样对原有基桩的影响。
The invention relates to the related technical field and discloses a construction engineering foundation pile detection device. The top plate is driven by a sampling mechanism to move up and down along the chute. The lower surface of the top plate is provided with a sampling motor. The turntable is provided with adjustment slots at equal angles. There is a drill pipe inside. By controlling the adjustment distance of the drill pipe, the width to be sampled can be freely controlled. During the first drilling process, the steel teeth on the outer cylinder can form a hole on the inner wall of the first drilling hole. The uneven connection surface is adjusted while adjusting the position of the drill pipe, so that an uneven connection surface can be formed on the inner wall of the second drilling during the second drilling, so that it can be drilled back during the drilling process. When pouring, the concrete poured back can be well combined with the original foundation piles. By taking cylindrical sampling of the foundation piles, the concrete poured back can be well combined with the original foundation piles, so that the concrete poured back can be well combined with the original foundation piles. It can reduce the impact of drilling core sampling on the original foundation piles.
Description
Technical Field
The invention relates to the technical field related to constructional engineering, in particular to a foundation pile detection device for constructional engineering.
Background
The construction engineering refers to engineering entity formed by construction of various house constructions and auxiliary facilities thereof and installation activities of matched lines, pipelines and equipment, wherein the house constructions refer to projects which are provided with top covers, beam columns, walls, foundations and can form inner spaces and meet the requirements of production, living, study and public activities, when the construction of houses is carried out, foundation piles of the houses are required to be firstly made, deep foundations consisting of piles and pile caps connected with pile tops or single-foundation piles connected with the foundation piles are required to be made for ensuring the stability of the houses, foundation piles are abbreviated to be called low-pile foundation piles if pile bodies are fully buried in soil, the bottom surfaces of the pile caps are contacted with the soil, and high-pile foundation piles are called high-pile foundation piles if the upper parts of the pile bodies are exposed out of the ground and the bottom surfaces of the pile caps are positioned above the ground, the foundation pile of the building is usually a low bearing platform foundation pile, the foundation pile is widely applied in high-rise buildings, after pouring and cooling forming of the foundation pile, various performances of the foundation pile are required to be detected, in the prior art, a static load test, a core drilling method, a low strain method, a high strain method and a sound wave transmission method are usually adopted for detection, wherein the core drilling method is one of common detection methods, when the detection is carried out, the existing core drilling method needs to drill holes on the foundation pile, then corresponding samples are taken out for detection, but when the sampling is carried out, larger drilled holes are left on the foundation pile, and when the casting is carried out, the side wall of the drilled holes is smooth, so the cast-back concrete cannot be well combined with the original foundation pile, and the integral performance of the foundation pile is reduced.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to overcome the problems presented above, a foundation pile detection device for construction engineering is provided, which solves the problems presented above.
The invention solves the technical problems by adopting the following technical scheme:
the utility model provides a building engineering foundation pile detection device, includes the base and locates the mounting bracket on the base, the middle part of base is equipped with the sample hole, the lateral wall of mounting bracket is equipped with the spout, it is equipped with the roof to slide in the spout, the roof passes through sampling mechanism and drives and reciprocate along the spout, the lower surface of roof is equipped with the sample motor, the output of sample motor is equipped with the carousel, the adjustment tank has been seted up to the equiangle on the carousel, be equipped with the drilling rod in the adjustment tank, the lower extreme of drilling rod is equipped with the sample sword, be equipped with shutdown mechanism between drilling rod and the sample sword, be equipped with the adjustment mechanism who is used for adjusting the drilling rod position in the adjustment tank, the adjustment distance of drilling rod equals the width that needs to sample.
Preferably, the adjusting mechanism comprises an adjusting screw rod arranged in the adjusting groove, the adjusting screw rod is in threaded connection with the upper end of the drill rod, and a nut is arranged at the end part of the adjusting screw rod.
Preferably, the adjusting distance of the drill rod is controlled by a distance measuring mechanism, the distance measuring mechanism comprises a distance measuring plate arranged at the upper end of the drill rod and four infrared distance measuring instruments arranged on the upper surface of the turntable and corresponding to the distance measuring plate, and the positions of the four infrared distance measuring instruments from the center of the turntable are the same.
Preferably, the power supply of the sampling motor can be switched on only when the distances between the four groups of infrared distance measuring devices and the distance measuring plate are the same.
Preferably, the sampling mechanism comprises a sampling screw rod arranged on the mounting frame, the sampling screw rod is in threaded connection with the top plate, and the two sampling screw rods synchronously rotate through the synchronizing mechanism.
Preferably, the synchronizing mechanism comprises four chain wheels and four chains, wherein two chain wheels are arranged at the lower end of the sampling screw rod, the other two chain wheels are rotatably arranged on the lower surface of the base, the four chain wheels are provided with the chains, and the chain wheels are driven by the external driving mechanism.
Preferably, the cutting mechanism comprises a rotating shaft for connecting the drill rod with the sampling knife, the drill rod is connected with the sampling knife in a rotating manner through the rotating shaft, an air cylinder is arranged at the position, corresponding to the upper end of the sampling knife, of the inner part of the lower end of the drill rod, the extending end of the air cylinder is connected with the end part of the sampling knife in a rotating manner, and the air cylinder is electrically connected with an external power supply through an electric slip ring for control.
Preferably, the outer side wall of the drill rod is provided with a mounting groove, the outer cylinder is rotationally connected with the mounting groove, steel teeth are continuously arranged on the outer side wall of the outer cylinder, the coverage area of the steel teeth is half of the side area of the outer cylinder, and the tooth directions of the steel teeth are randomly arranged.
Preferably, the lateral wall symmetry of urceolus is equipped with a set of pinhole, be equipped with the bolt in the pinhole, can link together urceolus and drilling rod through the bolt, after the bolt is installed in place, the tip of bolt does not surpass the lateral wall of urceolus.
Preferably, the side wall of roof is equipped with the mark board, the side wall of mounting bracket is equipped with the scale mark.
The invention has the advantages and positive effects that: when the core drilling sampling is carried out, can drive the carousel through the sampling motor and rotate, can drive drilling rod and sampling sword through the rotation of carousel and rotate, drive sampling sword through sampling mechanism and move downwards, thereby can drill out cylindric space on the foundation pile, then take out the sampling sword, adjust the position of drilling rod, carry out the secondary drilling, thereby can form another cylindric space on the foundation pile, can form a cylindric sample between two cylindric spaces, thereby can take out a cylindric sample from the foundation pile, thereby can avoid leaving great drilling on the foundation pile, can freely control the width that needs the sample through the regulation distance of control drilling rod, and in the in-process of first drilling, can form unsmooth junction surface at the inner wall of first drilling through the steel tooth on the urceolus, adjust the position of steel tooth, thereby can form unsmooth junction surface at the inner wall of second drilling when the secondary drilling, thereby can be when the back casting, make the back casting can well combine with the foundation pile and can be carried out the foundation pile well with the original foundation pile through the control, thereby can combine very good foundation pile and the concrete pile can be carried out to the original pile simultaneously.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the bottom structure of the present invention;
FIG. 3 is a schematic view of the internal structure of the drill pipe;
FIG. 4 is a schematic structural view of the outer cylinder and the steel teeth;
the index marks in the drawings are as follows:
1. a base; 2. a mounting frame; 3. a top plate; 4. a sampling motor; 5. an adjustment tank; 6. a drill rod; 7. a turntable; 8. an infrared range finder; 9. a ranging plate; 10. adjusting a screw; 11. a screw cap; 12. a marking plate; 13. scale marks; 14. a sampling hole; 15. a sampling knife; 16. a sprocket; 17. a chain; 18. a sampling screw; 19. a cylinder; 20. a rotating shaft; 21. a mounting groove; 22. an outer cylinder; 23. steel teeth; 24. a bolt.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
Embodiments of the invention are described in further detail below with reference to the attached drawing figures:
referring to fig. 1 to 4, the foundation pile detection device for construction engineering according to the present invention comprises a base 1 and a mounting frame 2 provided on the base 1, wherein a sampling hole 14 is provided in the middle of the base 1, a chute is provided on the side wall of the mounting frame 2, a top plate 3 is slidingly provided in the chute, the top plate 3 is driven by a sampling mechanism to move up and down along the chute, a sampling motor 4 is provided on the lower surface of the top plate 3, a turntable 7 is provided at the output end of the sampling motor 4, an adjusting groove 5 is provided on the turntable 7 at equal angles, a drill rod 6 is provided in the adjusting groove 5, a sampling knife 15 is provided at the lower end of the drill rod 6, a cutting mechanism is provided between the drill rod 6 and the sampling knife 15, an adjusting mechanism for adjusting the position of the drill rod 6 is provided in the adjusting groove 5, the adjusting distance of the drill rod 6 is equal to the sampling width, a mounting groove 21 is provided on the outer side wall of the drill rod 6, an outer cylinder 22 is rotatably connected in the mounting groove 21, the outer side wall of the outer cylinder 22 is continuously provided with steel teeth 23, the coverage area of the steel teeth 23 is half of the side area of the outer cylinder 22, the teeth of the steel teeth 23 are randomly arranged, the side wall of the outer cylinder 22 is symmetrically provided with a group of pin holes, pins 24 are arranged in the pin holes, the outer cylinder 22 and a drill rod 6 can be connected together through the pins 24, after the pins 24 are installed in place, the end parts of the pins 24 do not exceed the outer side wall of the outer cylinder 22, when core drilling and sampling are carried out, a rotary table 7 can be driven to rotate through a sampling motor 4, a drill rod 6 and a sampling cutter 15 can be driven to rotate through the rotation of the rotary table 7, the sampling cutter 15 is driven to move downwards through a sampling mechanism, so that a cylindrical space can be drilled on a foundation pile, then the sampling cutter 15 is taken out, the position of the drill rod 6 is adjusted, secondary drilling is carried out, and therefore, another cylindrical space can be formed on the foundation pile, a cylindrical sample can be formed between two cylindrical spaces, so that a cylindrical sample can be taken out of a foundation pile, a larger drilled hole can be prevented from being left on the foundation pile, the width required to be sampled can be freely controlled by controlling the adjusting distance of a drill rod 6, in the process of drilling for the first time, an uneven connecting surface can be formed on the inner wall of the first time through steel teeth 23 on an outer cylinder 22, the position of the drill rod 6 is adjusted, meanwhile, the position of the steel teeth 23 is adjusted, and accordingly an uneven connecting surface can be formed on the inner wall of the second time drilled hole during drilling for the second time, and accordingly recycled concrete can be well combined with the original foundation pile during recycling.
Further, adjustment mechanism is including setting up the adjusting screw 10 in adjusting slot 5, threaded connection between the upper end of adjusting screw 10 and drilling rod 6, the tip of adjusting screw 10 is equipped with nut 11, the adjustment distance of drilling rod 6 is controlled through range finding mechanism, range finding mechanism is including setting up in the range finding board 9 of drilling rod 6 upper end and setting up in the infrared range finder 8 that carousel 7 upper surface corresponds with range finding board 9, the position of four infrared range finders 8 is the same apart from carousel 7 center, the power of sampling motor 4 just can be put through when the distance between four infrared range finders 8 and the range finding board 9 is the same, the rotation through adjusting screw 10 can drive drilling rod 6 and slide along adjusting slot 5, thereby can adjust the position of drilling rod 6, the distance that measuring drilling rod 6 that can be accurate through range finding board 9 and infrared range finder 8, when making the distance between four infrared range finders 8 and the range finding board 9 the same, the power of sampling motor 4 just can be put through, thereby can guarantee that four drilling rods 6 rotate in same circumference.
Further, the sampling mechanism includes the sampling screw 18 of installing on mounting bracket 2, threaded connection between sampling screw 18 and the roof 3, two sampling screw 18 carry out synchronous rotation through synchro mechanism, synchro mechanism includes sprocket 16 and chain 17, sprocket 16 is four, wherein two sprocket 16 are arranged in the lower extreme of sampling screw 18, two other sprocket 16 rotate and set up in the lower surface of base 1, be equipped with chain 17 between four sprocket 16, sprocket 16 drives through external driving mechanism, can drive two sampling screw 18 through sprocket 16 and chain 17 and carry out synchronous rotation, can drive roof 3 through sampling screw 18 and reciprocate, thereby can make sampling sword 15 reciprocate.
Further, the shutdown mechanism is including the pivot 20 that is used for connecting drilling rod 6 and sampling sword 15, connect drilling rod 6 and sampling sword 15 and rotate through pivot 20 and be connected, the inside of drilling rod 6 lower extreme and the position that sampling sword 15 upper end corresponds are equipped with cylinder 19, rotate between the tip of cylinder 19 and sampling sword 15 and be connected, cylinder 19 passes through the electric slip ring electricity and connects external power source and control, after the completion of the secondary drilling, can drive the upper end of sampling sword 15 through cylinder 19, thereby can make sampling sword 15 rotate along pivot 20, thereby can make the lower extreme of sampling sword 15 incline, thereby can make sampling sword 15 cut off the lower extreme of cylindric sample, thereby can conveniently take out cylindric sample.
Further, the side wall of the top plate 3 is provided with a marking plate 12, the side wall of the mounting frame 2 is provided with scale marks 13, and the depth of sampling can be observed through the marking plate 12 and the scale marks 13.
It should be emphasized that the examples described herein are illustrative rather than limiting, and therefore the invention is not limited to the examples described in the detailed description, but rather falls within the scope of the invention as defined by other embodiments derived from the technical solutions of the invention by those skilled in the art.
Claims (10)
1. The utility model provides a building engineering foundation pile detection device, includes base (1) and locates mounting bracket (2) on base (1), the middle part of base (1) is equipped with sample hole (14), the lateral wall of mounting bracket (2) is equipped with the spout, the slip is equipped with roof (3), its characterized in that in the spout: roof (3) drive through sampling mechanism and follow the spout and reciprocate, the lower surface of roof (3) is equipped with sample motor (4), the output of sample motor (4) is equipped with carousel (7), adjustment tank (5) have been seted up to equiangle on carousel (7), be equipped with drilling rod (6) in adjustment tank (5), the lower extreme of drilling rod (6) is equipped with sample sword (15), be equipped with shutdown mechanism between drilling rod (6) and sample sword (15), be equipped with the adjustment mechanism who is used for adjusting drilling rod (6) position in adjustment tank (5) the adjustment distance of drilling rod (6) equals the width that needs to sample.
2. A construction foundation pile detection device according to claim 1, characterized in that: the adjusting mechanism comprises an adjusting screw (10) arranged in the adjusting groove (5), the adjusting screw (10) is in threaded connection with the upper end of the drill rod (6), and a screw cap (11) is arranged at the end part of the adjusting screw (10).
3. A construction foundation pile detection device according to claim 2, characterized in that: the adjusting distance of the drill rod (6) is controlled through a distance measuring mechanism, the distance measuring mechanism comprises a distance measuring plate (9) arranged at the upper end of the drill rod (6) and infrared distance measuring instruments (8) arranged on the upper surface of the rotary table (7) and corresponding to the distance measuring plate (9), and the positions of the four infrared distance measuring instruments (8) away from the center of the rotary table (7) are the same.
4. A construction foundation pile detection device according to claim 3, wherein: and when the distances between the four groups of infrared distance meters (8) and the distance measuring plate (9) are the same, the power supply of the sampling motor (4) can be switched on.
5. A construction foundation pile detection device according to claim 1, characterized in that: the sampling mechanism comprises sampling screws (18) arranged on the mounting frame (2), the sampling screws (18) are in threaded connection with the top plate (3), and the two sampling screws (18) synchronously rotate through the synchronizing mechanism.
6. The construction foundation pile detection device of claim 5, wherein: the synchronous mechanism comprises four chain wheels (16) and chains (17), wherein two chain wheels (16) are arranged at the lower end of a sampling screw rod (18), the other two chain wheels (16) are rotatably arranged on the lower surface of the base (1), the chains (17) are arranged between the four chain wheels (16), and the chain wheels (16) are driven by an external driving mechanism.
7. A construction foundation pile detection device according to claim 1, characterized in that: the cutting mechanism comprises a rotating shaft (20) used for connecting a drill rod (6) with a sampling knife (15), the drill rod (6) is connected with the sampling knife (15) in a rotating mode through the rotating shaft (20), an air cylinder (19) is arranged in the lower end of the drill rod (6) at a position corresponding to the upper end of the sampling knife (15), the extending end of the air cylinder (19) is connected with the end portion of the sampling knife (15) in a rotating mode, and the air cylinder (19) is connected with an external power supply through an electric slip ring to control.
8. A construction foundation pile detection device according to claim 1, characterized in that: the outer side wall of the drill rod (6) is provided with a mounting groove (21), the outer cylinder (22) is rotationally connected with the mounting groove (21), steel teeth (23) are continuously arranged on the outer side wall of the outer cylinder (22), the coverage area of the steel teeth (23) is half of the side area of the outer cylinder (22), and the tooth directions of the steel teeth (23) are randomly arranged.
9. The construction foundation pile detection device of claim 8, wherein: the side wall symmetry of urceolus (22) is equipped with a set of pinhole, be equipped with bolt (24) in the pinhole, can link together urceolus (22) and drilling rod (6) through bolt (24), after bolt (24) are installed in place, the tip of bolt (24) does not surpass the lateral wall of urceolus (22).
10. A construction foundation pile detection device according to claim 1, characterized in that: the side wall of roof (3) is equipped with marking plate (12), the side wall of mounting bracket (2) is equipped with scale mark (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311247682.1A CN117051903A (en) | 2023-09-25 | 2023-09-25 | A construction engineering foundation pile detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311247682.1A CN117051903A (en) | 2023-09-25 | 2023-09-25 | A construction engineering foundation pile detection device |
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| Publication Number | Publication Date |
|---|---|
| CN117051903A true CN117051903A (en) | 2023-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311247682.1A Pending CN117051903A (en) | 2023-09-25 | 2023-09-25 | A construction engineering foundation pile detection device |
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| CN (1) | CN117051903A (en) |
Citations (7)
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| CN102251522A (en) * | 2011-04-29 | 2011-11-23 | 常华北 | Filling pile coring method and combined concrete coring device |
| CN103244049A (en) * | 2012-02-10 | 2013-08-14 | 震东机械设备有限公司 | Method and apparatus for controlling operation of cluster drill of DTH hammers |
| CN111692424A (en) * | 2020-06-21 | 2020-09-22 | 江苏地龙重型机械有限公司 | Circular cutting pipe drawing construction process and circular cutting pipe drawing drilling machine |
| CN214066565U (en) * | 2020-12-31 | 2021-08-27 | 郭林江 | Geotechnical engineering reconnaissance probing sampling device that fetches earth |
| CN215004373U (en) * | 2021-05-12 | 2021-12-03 | 曹立阳 | A investigation sampling device for open mine ecological geology environment |
| CN216082133U (en) * | 2021-11-04 | 2022-03-18 | 王振佳 | Sampling equipment for geological mineral exploration |
| CN116480289A (en) * | 2023-02-21 | 2023-07-25 | 江苏东合南岩土科技股份有限公司 | A drilling machine for circular holes |
-
2023
- 2023-09-25 CN CN202311247682.1A patent/CN117051903A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251522A (en) * | 2011-04-29 | 2011-11-23 | 常华北 | Filling pile coring method and combined concrete coring device |
| CN103244049A (en) * | 2012-02-10 | 2013-08-14 | 震东机械设备有限公司 | Method and apparatus for controlling operation of cluster drill of DTH hammers |
| CN111692424A (en) * | 2020-06-21 | 2020-09-22 | 江苏地龙重型机械有限公司 | Circular cutting pipe drawing construction process and circular cutting pipe drawing drilling machine |
| CN214066565U (en) * | 2020-12-31 | 2021-08-27 | 郭林江 | Geotechnical engineering reconnaissance probing sampling device that fetches earth |
| CN215004373U (en) * | 2021-05-12 | 2021-12-03 | 曹立阳 | A investigation sampling device for open mine ecological geology environment |
| CN216082133U (en) * | 2021-11-04 | 2022-03-18 | 王振佳 | Sampling equipment for geological mineral exploration |
| CN116480289A (en) * | 2023-02-21 | 2023-07-25 | 江苏东合南岩土科技股份有限公司 | A drilling machine for circular holes |
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