CN220815546U - High-precision drilling device for geotechnical engineering survey - Google Patents
High-precision drilling device for geotechnical engineering survey Download PDFInfo
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- CN220815546U CN220815546U CN202321638889.7U CN202321638889U CN220815546U CN 220815546 U CN220815546 U CN 220815546U CN 202321638889 U CN202321638889 U CN 202321638889U CN 220815546 U CN220815546 U CN 220815546U
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- 238000005553 drilling Methods 0.000 title claims abstract description 60
- 239000002689 soil Substances 0.000 claims abstract description 91
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 239000011435 rock Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to a high-precision drilling device for geotechnical engineering survey; the drilling device comprises a driving mechanism and a drill rod, wherein the drill rod is connected to a rotating shaft of the driving mechanism, a holding ring is arranged at the joint of the rotating shaft and the drill rod, the holding ring holds the rotating shaft and the drill rod respectively, and a soil turning assembly is arranged at the bottom of the holding ring. According to the utility model, the embracing ring is arranged at the joint of the rotating shaft and the drill rod, and the embracing ring respectively embraces the rotating shaft and the drill rod, so that the phenomenon that the joint of the drill rod and the rotating shaft excessively shakes due to the problem of rock stratum, the drilling position is deviated, the accuracy of the drilling position is improved, and the accuracy of the drilling device is improved; and the bottom of the embracing ring is provided with a soil turning assembly, so that the soil gathered around the survey pit can be evacuated.
Description
Technical Field
The utility model relates to the technical field of surveying, in particular to a high-precision drilling device for geotechnical engineering surveying.
Background
Geotechnical engineering investigation is to find out, analyze and evaluate the geological and environmental characteristics of a construction site and activities of geotechnical engineering condition compiling investigation files, which are the basis of design and construction, if the investigation work is not in place, poor engineering geological problems are revealed, even if the design and construction of an upper structure are high-quality, the upper structure is not damaged, and engineering activities of different types and scales bring different degrees of influence to geological environments;
Generally when river course border sets up protective structure, can survey the soil layer at the river bank limit, need survey rock structure and soil structure, thereby do benefit to the pre-buried protective structure of later stage construction, the condition that drilling rod and motor output exist when the use of current survey device, still can lead to the drilling rod to break away from the problem of output to appear when very easy off tracking is serious, the soil of some earth's surface is transported up when surveying simultaneously, all gather and survey the circumstances that very easily take place to block up around the hole, in order to solve this problem, need a high accuracy drilling rig that geotechnical engineering surveyed is used to solve above-mentioned problem.
Disclosure of utility model
In order to solve the problems, the utility model provides a high-precision drilling device for geotechnical engineering survey, which comprises a driving mechanism and a drill rod, wherein the drill rod is connected to a rotating shaft of the driving mechanism, a holding ring is arranged at the joint of the rotating shaft and the drill rod, the holding ring holds the rotating shaft and the drill rod respectively, and a soil turning assembly is arranged at the bottom of the holding ring.
Further, the soil turning assembly comprises a soil turning support connected to the bottom of the holding ring, and a soil turning inclined plate and/or a soil shifting assembly is arranged on the soil turning support.
Further, when the bulldozing assembly is arranged, the bulldozing assembly comprises an air cylinder and a push plate, the air cylinder is arranged on the soil turning support, and the push plate is installed at the output end of the air cylinder.
Further, when the soil turning inclined plate is arranged, the soil turning inclined plate is arranged at the bottom of the soil turning support, the soil turning inclined plate is inclined downwards, and the distance between the soil turning inclined plate and the drill rod is gradually increased from top to bottom.
Further, the soil turning support is an annular cover body with upper and lower openings, and the annular cover body is connected to the holding ring through a connecting frame.
Further, when the soil turning inclined plate and the bulldozer assembly are simultaneously arranged, the bulldozer assembly is arranged above the soil turning inclined plate.
Further, the embracing ring comprises two fan-shaped ring frames which are detachably connected, the inner ring of each fan-shaped ring frame is respectively abutted to the rotating shaft and the drill rod, and the bottom of at least one fan-shaped ring frame is provided with a soil turning assembly.
Further, the sector ring frame comprises an upper sector plate and a lower sector plate, the upper sector plate and the lower sector plate are connected through a plurality of connecting posts, and the upper sector plate and the lower sector plate are coaxial with the rotating shaft.
Further, the lifting mechanism is arranged at the top of the fixing frame, the telescopic end of the lifting mechanism is connected with the connecting seat, and the driving mechanism is arranged on the connecting seat.
Further, the fixing frame is further provided with a stabilizing component, the stabilizing component comprises a supporting seat, one end of the supporting seat is connected to the fixing frame, two sides of the other end of the supporting seat are respectively provided with a guide rod, and the guide rods penetrate through the connecting seat.
Compared with the prior art, the utility model has the following beneficial effects due to the adoption of the technical scheme:
1) According to the high-precision drilling device for geotechnical engineering survey, the embracing rings are arranged at the joints of the rotating shaft and the drill rod and respectively embrace the rotating shaft and the drill rod, so that the phenomenon that the joint of the drill rod and the rotating shaft excessively shakes due to the problem of rock stratum to cause the deviation of the drilling position is avoided, the accuracy of the drilling position is improved, and the accuracy of the drilling device is improved; the bottom of the embracing ring is provided with a soil turning assembly which can disperse the soil gathered around the survey pit;
2) The utility model provides a high-precision drilling device for geotechnical engineering survey, wherein a soil turning assembly comprises a soil turning inclined plate, and the soil turning inclined plate can be used for poking away soil gathered around a survey pit; the soil turning assembly further comprises a bulldozing assembly, and the pushing plate further pushes soil away from the survey pit under the action of the air cylinder, so that the soil is prevented from being accumulated around the survey pit to cause blockage.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a drilling apparatus according to the present utility model;
FIG. 2 is a schematic view of a portion of a drilling apparatus according to the present utility model;
fig. 3 is a schematic structural view of a fan-shaped ring frame and a soil turning assembly in the drilling device provided by the utility model.
1-A driving mechanism; 11-a rotating shaft; 2-a drill rod; 21-leaf; 3-a fan-shaped ring frame; 31-an extension plate; 32-a fixed assembly; 33-an upper sector plate; 34-lower sector plate; 35-connecting columns; 4-a soil turning assembly; 41-an arc-shaped cover body; 42-soil turning inclined plates; 43-cylinder; 44-push plate; 45-arc-shaped plates; 5-fixing frame; 6-connecting seats; 7-a mounting seat; 71-a bracket; 8-a hydraulic cylinder; 81-a telescopic rod; 9-a supporting seat; 10-a guide rod.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are included in the protection scope of the present utility model. In the drawings, the size and relative sizes of certain parts may be exaggerated for clarity.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected" and "coupled" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be used in any form, such as directly or indirectly through an intermediate medium, or may be used in any form of communication between two elements or in any form of interaction between two elements, and the terms are specifically understood by those of ordinary skill in the art.
In the description of the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "center", "horizontal", "vertical", "top", "bottom", "inner", "outer", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, in the description of the present utility model, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not necessarily for indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.
As shown in fig. 1 of the specification, the utility model provides a high-precision drilling device for geotechnical engineering survey, which comprises a driving mechanism 1 and a drill rod 2, wherein the drill rod 2 is connected to a rotating shaft 11 of the driving mechanism 1, a holding ring is arranged at the joint of the rotating shaft 11 and the drill rod 2, the holding ring holds the rotating shaft 11 and the drill rod 2 respectively, and a soil turning component 4 is arranged at the bottom of the holding ring; specifically, the drilling rod 2 pass through the axle sleeve with pivot 11 is connected, under the rotation of actuating mechanism 1, drives drilling rod 2 and bores, actuating mechanism 1 can be motor or rig, sets up according to actual demand, armful ring setting is in the outside of drilling rod 2 and pivot 11 junction for strengthen the joint strength between drilling rod 2 and the pivot 11, armful ring's both ends are embraced respectively drilling rod 2 and pivot 11, strengthen the stability of pivot 11 and drilling rod 2 junction, thereby avoid leading to the junction to rock to take place to bore the problem of off-set and taking off-rod because of long-term use.
In an optimized embodiment, the soil turning assembly 4 includes a soil turning support connected to the bottom of the hugging ring, and a soil turning inclined plate 42 and/or a soil shifting assembly is/are arranged on the soil turning support, specifically, a soil turning inclined plate 42 is arranged on the soil turning support, or a soil shifting assembly is arranged on the soil turning support, or a soil turning inclined plate 42 and a soil shifting assembly are arranged on the soil turning support, and preferably, in this embodiment, a soil turning inclined plate 42 and a soil shifting assembly are arranged on the soil turning support.
Further, the soil-turning inclined plate 42 is disposed at the bottom of the soil-turning support, the soil-turning inclined plate 42 is inclined downward and the distance between the soil-turning inclined plate 42 and the drill rod 2 gradually increases from top to bottom, and preferably, at least one inclined plate 42 is disposed on the soil-turning support.
Further, the bulldozing assembly comprises an air cylinder 43 and a push plate 44, the air cylinder 43 is arranged on the soil turning support, the push plate 44 is arranged at the output end of the air cylinder 43, the movement direction of the push plate 44 is towards the outer side of the soil turning support and is used for pushing soil away from a survey pit, preferably, at least one bulldozing assembly is arranged on the soil turning support, and the bulldozing assembly can be staggered with the inclined plate 42, can be arranged above the soil turning inclined plate 42 and can be arranged according to actual requirements.
In an optimized embodiment, the soil turning support is an annular cover body 41 with an upper opening and a lower opening, the annular cover body is connected to the holding ring through a connecting frame, namely one end of the connecting frame is connected to the holding ring, the other end of the connecting frame is connected with the arc-shaped cover body 41, and the soil turning inclined plate 42 and/or the bulldozing assembly is/are arranged on the arc-shaped cover body 41; specifically, the arc-shaped cover 41 is arranged around the drill rod 2, specifically, a material opening is formed in the upper end of the arc-shaped cover 41 and located above the drill rod blade, the bottom of the arc-shaped cover 41 is connected with a soil turning inclined plate 42, one end, far away from the arc-shaped cover 41, of the soil turning inclined plate 42 is inclined downwards, and a bulldozing assembly is arranged on the side wall of the arc-shaped cover 41; specifically, when drilling is performed on the drill rod 2, the blades 21 can drive the soil to move upwards, the soil is flushed out from the material through holes of the arc-shaped cover body 41 and is accumulated around the arc-shaped cover body 41, the soil can move around along the soil turning inclined plate 42, the soil turning inclined plate 42 rotates along with the rotating shaft 11, the soil can be pushed outwards, meanwhile, the soil can be further pushed outwards by the bulldozing assembly on the arc-shaped cover body 41, and the soil is prevented from being accumulated at a survey pit to cause blockage.
In an optimized embodiment, an arc-shaped plate 45 is arranged on the side wall of the arc-shaped cover 41, on one hand, the arc-shaped plate 45 can enhance the strength of the arc-shaped cover 41, and on the other hand, the air cylinder 43 can be arranged on the arc-shaped plate 45; of course, the cylinder 43 may also be provided directly on the side wall of the arc-shaped housing 41.
According to the refinement embodiment, at least one arc-shaped plate 45 is arranged on the side wall of the arc-shaped cover body 41, so that the cylinder 43 can be arranged at the bottom of the arc-shaped plate 45 to avoid damage to the cylinder 43 caused by soil, and the cylinder 43 can be prevented from being damaged due to impact of falling soil to the cylinder 43.
In an optimized embodiment, the spiral blades 21 are arranged on the outer side of the drill rod 2, the drill rod is suitable for drilling work at the edge of a river channel, and the length of the drill rod meets the surveying working depth of the river channel drilling in a normal range.
In an optimized embodiment, the embracing ring comprises two fan-shaped ring frames 3 which are detachably connected, the inner ring of each fan-shaped ring frame 3 is respectively abutted against the rotating shaft 11 and the drill rod 2, and the bottom of at least one fan-shaped ring frame 3 is provided with a soil turning component 4; specifically, two fan-shaped circle frames 3 enclose and close and form the hollow post, and the cover is established in the junction outside of drilling rod 2 and pivot 11, promptly two fan-shaped circle frame 3 encircles the junction setting of drilling rod 2 and pivot 11, two fan-shaped circle frame 3 both sides all are provided with extension board 31, and correspond and put two connect through fixed subassembly 32 between the extension board 31, this fixed subassembly 32 can be hinge or bolt etc..
As one of the embodiments, one side of the two fan-shaped ring frames 3 is hinged, the other side is detachably connected through bolts, specifically, a hinge is arranged between the extending plates 31 on the corresponding side of one side of the two fan-shaped ring frames 3, the two extending plates on the other side are fixed through bolts, and in the process of installation or disassembly, the two fan-shaped ring frames are connected together, so that the installation is convenient, meanwhile, the loss can be avoided, and the whole set of holding ring is convenient to preserve.
As one embodiment, the extension plates 31 on two corresponding sides of the two fan-shaped ring frames 3 are fixed by bolts, and the two fan-shaped ring frames 3 have the same structure, so that the modular assembly is facilitated; the extension plate 31 is provided with a plurality of threaded holes, and can be fixed through a plurality of bolts, so that the connection of the fan-shaped ring frame 3 is firmer.
In an optimized embodiment, as shown in fig. 2 and 3 of the specification, the fan-shaped ring frame 3 comprises an upper fan-shaped plate 33 and a lower fan-shaped plate 34, the upper fan-shaped plate 33 and the lower fan-shaped plate 34 are connected through a plurality of connecting posts 35, and the upper fan-shaped plate 33 and the lower fan-shaped plate 34 are coaxial with the rotating shaft 11; in this embodiment, the upper sector plate 33 is wrapped around the rotating shaft 11, the lower sector plate 34 is wrapped around the drill rod 2, if the upper sector plate 33 is not fit with the rotating shaft 11, the upper sector plate 33 cannot be wrapped around the rotating shaft 11, the sleeve 12 may be disposed on the rotating shaft 11, so that the upper sector plate 33 of the sector frame 3 is wrapped around the sleeve 12, and similarly, if the lower sector plate 34 is not fit with the drill rod 2, the lower sector plate 34 cannot be wrapped around the drill rod 2, the sleeve may be disposed on the drill rod 2, so that the lower sector plate 34 of the sector frame 3 is wrapped around the sleeve; the curvatures of the upper sector plate 33 and the lower sector plate 34 may be the same or may be set to be different according to the need.
The optimized implementation mode further comprises a fixing frame 5, wherein the top of the fixing frame 5 is provided with a lifting mechanism, the lifting mechanism can adopt conventional linear motion equipment such as a hydraulic cylinder, a telescopic rod, a screw rod or a linear motion module, the telescopic end of the lifting mechanism is connected with a connecting seat 6, and the driving mechanism 1 is arranged on the connecting seat 6; in this embodiment, the driving mechanism 1 is disposed at a telescopic end of the lifting mechanism, and the driving mechanism 1 can be driven by the lifting mechanism to move in a vertical direction, so as to adjust a position of the driving mechanism 1 in the vertical direction, so that the height of the drill rod 2 is convenient to be adjusted for drilling.
In the optimized embodiment, the drilling device further comprises a mounting seat 7, the fixing frame 5 is arranged on the mounting seat 7, the mounting seat 7 is placed on the ground, and preferably, in order to enable the fixing frame 5 to be stably arranged on the mounting seat 7, the mounting seat 7 is provided with a counterweight, so that the drilling operation is more stable; preferably, the bottom of the mounting seat 7 is provided with a bracket 71, and further, the bracket 71 may be locked on the ground by a bolt or an anchor bolt.
In an optimized embodiment, the lifting mechanism comprises a hydraulic cylinder 8 arranged at the top of the fixed frame 5, the telescopic end of the hydraulic cylinder 8 penetrates through the inner side of the fixed frame 5 and the end part of the hydraulic cylinder is connected with the connecting seat 6, a stabilizing component is further arranged on the fixed frame 5, and the stabilizing component is positioned below the hydraulic cylinder 8; in this embodiment, firm subassembly is located hydraulic cylinder 8 below, and firm subassembly is connected with mount 5, and firm subassembly is used for leading in the elevating process of connecting seat 6 for connecting seat 6 is more stable in the ascending operation of vertical direction.
In an optimized mode, the stabilizing component comprises a supporting seat 9, one end, close to the fixing frame 5, of the supporting seat 9 is connected with the fixing frame 5, the other end is U-shaped, a middle notch of the U-shaped is capable of avoiding the telescopic end of the hydraulic cylinder 8, an installation position is reserved for a telescopic rod 81 of the hydraulic cylinder 8, two ends of the U-shaped are respectively provided with a guide rod 10, the guide rods 10 are vertically arranged, through holes are formed in two ends of the connecting seat 6, the guide rods 10 can penetrate through the through holes, the connecting seat 6 can slide along the guide rods 10 in the lifting process, and the length of the guide rods 10 is larger than the stroke of the hydraulic cylinder 8 for driving the connecting seat 6 to move up and down.
In a refinement embodiment, in order to make the guide rod 10 more stable, the upper end of the guide rod 10 can be connected with the top end of the fixing frame 5, the lower end of the guide rod 10 can be connected with the bottom of the fixing frame 5, and the connecting seat 6 can be lifted under the guidance of the guide rods 10 at two ends, so that the movement is more stable.
The working principle of the drilling device is that the drilling device is moved to a surveying position, components such as a driving mechanism 1, a connecting seat 6 and the like can move downwards under the driving of a hydraulic cylinder 8, the driving mechanism 1 is connected with an external connecting power supply at the moment, a drilling rod 2 is driven to drill soil at the surveying position, the underground soil layer is surveyed, in order to ensure that the connecting position of the drilling rod 2 and the driving mechanism 1 is more stable when the drilling rod 2 is used, the problem that the drilling rod 2 is drilled due to shaking is avoided, or the problem that the drilling rod 2 falls off is solved, two groups of half-circle frames 3 are sleeved on the outer side of the connecting position of a rotating shaft 11 and the drilling rod 2, then the connecting position of the rotating shaft 11 and the drilling rod 2 is fixed through a plurality of groups of bolts and nuts, so that the connecting position of the rotating shaft 11 and the drilling rod 2 is ensured to be firmer, the soil is pushed to the ground surface from a material through hole of an arc-shaped cover body 41 and then falls to one side surface of an inclined plate 42, the inclined plate 42 guides the soil to two sides, and the cylinder 43 can push a pushing plate 44 to separate a poking path along with the accumulation of the soil, so that the soil can be far away from the drilling hole to a better use position.
And all that is not described in detail in this specification is well known to those skilled in the art.
It will be appreciated by those skilled in the art that the utility model can be embodied in many other specific forms without departing from the spirit or scope of the utility model. Although an embodiment of the present utility model has been described, it is to be understood that the utility model is not limited to this embodiment, and that variations and modifications may be effected by one skilled in the art within the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. The utility model provides a high accuracy drilling equipment that geotechnical engineering surveyed usefulness, includes actuating mechanism and drilling rod, the drilling rod is connected in actuating mechanism's pivot, its characterized in that the pivot with the drilling rod junction is equipped with the armful ring, armful ring is embraced respectively the pivot with the drilling rod the bottom of armful ring is equipped with the soil turning assembly.
2. A high precision drilling apparatus for geotechnical engineering survey according to claim 1, wherein the soil turning assembly comprises a soil turning bracket connected to the bottom of the holding ring, and a soil turning sloping plate and/or a bulldozer assembly is arranged on the soil turning bracket.
3. A high precision drilling apparatus for geotechnical engineering survey according to claim 2, wherein when the bulldozer assembly is provided, the bulldozer assembly comprises a cylinder and a push plate, the cylinder is provided on the soil turning support, and the push plate is mounted at an output end of the cylinder.
4. The high precision drilling apparatus for geotechnical engineering survey according to claim 2, wherein the soil turning inclined plate is disposed at the bottom of the soil turning support when the soil turning inclined plate is disposed, the soil turning inclined plate is inclined downward and the interval between the soil turning inclined plate and the drill rod is gradually increased from top to bottom.
5. The high precision drilling apparatus for geotechnical engineering survey according to claim 2, wherein the soil turning support is an annular cover body with upper and lower openings, and the annular cover body is connected to the holding ring through a connecting frame.
6. The high precision drilling apparatus for geotechnical engineering survey according to claim 2, wherein the bulldozer assembly is disposed above the soil turning sloping plate when the soil turning sloping plate and the bulldozer assembly are simultaneously provided.
7. The high precision drilling apparatus for geotechnical engineering survey according to claim 1, wherein the holding ring comprises two fan-shaped ring frames detachably connected, an inner ring of each fan-shaped ring frame is respectively abutted against the rotating shaft and the drill rod, and a soil turning assembly is arranged at the bottom of at least one of the fan-shaped ring frames.
8. The high precision drilling apparatus for geotechnical engineering survey according to claim 7, wherein the fan-shaped ring frame comprises an upper fan-shaped plate and a lower fan-shaped plate, the upper fan-shaped plate and the lower fan-shaped plate are connected through a plurality of connecting posts, and the upper fan-shaped plate and the lower fan-shaped plate are coaxial with the rotating shaft.
9. The high precision drilling apparatus for geotechnical engineering survey according to claim 1, further comprising a fixing frame, wherein a lifting mechanism is arranged at the top of the fixing frame, a connecting seat is connected to a telescopic end of the lifting mechanism, and the driving mechanism is arranged on the connecting seat.
10. The high-precision drilling device for geotechnical engineering survey according to claim 9, wherein a stabilizing component is further arranged on the fixing frame and comprises a supporting seat, one end of the supporting seat is connected to the fixing frame, guide rods are arranged on two sides of the other end of the supporting seat, and the guide rods penetrate through the connecting seat.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202321638889.7U CN220815546U (en) | 2023-06-27 | 2023-06-27 | High-precision drilling device for geotechnical engineering survey |
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Application Number | Priority Date | Filing Date | Title |
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CN202321638889.7U CN220815546U (en) | 2023-06-27 | 2023-06-27 | High-precision drilling device for geotechnical engineering survey |
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CN220815546U true CN220815546U (en) | 2024-04-19 |
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CN202321638889.7U Active CN220815546U (en) | 2023-06-27 | 2023-06-27 | High-precision drilling device for geotechnical engineering survey |
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2023
- 2023-06-27 CN CN202321638889.7U patent/CN220815546U/en active Active
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