Sampling device for rock-soil drilling

Abstract

The invention relates to the technical field of geotechnical engineering, and discloses a geotechnical drilling sampling device which comprises a sampling drilling tool and a movable drilling rig, the sampling drilling tool is arranged on the movable drilling rig, and the sampling drilling tool comprises a transmission mechanism, a drill bit mechanism, a driving mechanism, a discharging pipe, a drilling barrel and a drilling rod; the drill bit mechanism is arranged at the lower end of the drill rod, a conveying platform is arranged on the peripheral wall of the drill rod, and the rotary drum sleeves the periphery of the conveying platform; the transmission mechanism comprises a transmission sleeve, an inner drive connecting rod and a transmission assembly, the transmission sleeve is arranged at the upper end of the rotary drum in a sleeving mode and connected with the rotary drum, the upper end of the drill rod is connected with the lower end of the inner drive connecting rod, the peripheral wall of the inner drive connecting rod is in transmission connection with the rotary drum through the transmission assembly, and a discharging port communicating with the upper end of the conveying platform is formed in the peripheral wall of the rotary drum. The discharging pipe is arranged on the peripheral wall of the transmission sleeve in a penetrating manner and is communicated with the discharging hole; the driving mechanism is arranged at the upper end of the transmission sleeve and is in transmission connection with the inner driving connecting rod. According to the device, a drilled hole can be tamped and consolidated, and soil backfilling after equipment evacuation is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of geotechnical engineering, and particularly to a geotechnical drilling and sampling device. Background Art

[0002] In the field of geotechnical engineering investigation, the structural design and functional completeness of the sampling device directly affect the accuracy of investigation data and the operation efficiency. At present, there are already some portable sampling devices. These devices usually adopt simple drilling mechanisms. For example, a sampling rod is driven by a slider for drilling and sampling. After sampling, a spring or other mechanism is used to retract the sampling rod, and a folding mechanism is used to reduce the volume, so as to facilitate carrying. However, there are still significant technical bottlenecks in such sampling devices: firstly, there is a lack of an immediate hole wall reinforcement function during the drilling and sampling process. When the sampling rod is withdrawn from the formation, the untreated loose soil layer around the drill hole is extremely prone to collapse under the action of gravity or groundwater, resulting in the hole formed by sampling being backfilled within a few minutes. This phenomenon is particularly prominent under unstable geological conditions such as sandy soil layers and silt, which not only causes low efficiency of repeated sampling, but also affects the implementation of subsequent in-situ testing, hydrogeological observation and other series of investigation processes. Therefore, developing a geotechnical sampling device with a dynamic hole wall reinforcement mechanism has become a key technical requirement for improving the quality of engineering investigation. Summary of the Invention

[0003] The purpose of the present invention is to design a geotechnical drilling and sampling device that can avoid drill hole collapse.

[0004] To achieve the above purpose, the present invention provides a geotechnical drilling and sampling device, including: a sampling drill and a mobile drill rig. The sampling drill is arranged on the mobile drill rig. The sampling drill includes a transmission mechanism, a drill bit mechanism, a driving mechanism, a discharge pipe, and a drill barrel and a drill rod that both extend in the vertical direction.

[0005] The drill bit mechanism is arranged at the lower end of the drill rod. A helically rising conveying platform is provided on the outer peripheral wall of the drill rod. The rotating cylinder is coaxially sleeved on the outer periphery of the conveying platform.

[0006] The transmission mechanism includes a transmission sleeve, an inner driving link, and a transmission component. The transmission sleeve is sleeved on the upper end of the rotating cylinder and is connected to the rotating cylinder through a bearing. The upper end of the drill rod is coaxially connected to the lower end of the inner driving link. The outer peripheral wall of the inner driving link is in transmission connection with the rotating cylinder through the transmission component. An outlet is provided on the outer peripheral wall of the rotating cylinder and is communicated with the upper end of the conveying platform. The discharge pipe penetrates through the outer peripheral wall of the transmission sleeve from outside to inside and is communicated with the outlet.

[0007] The driving mechanism is arranged at the upper end of the transmission sleeve and is in transmission connection with the inner driving link.

[0008] Furthermore, the drill bit mechanism also includes a three-roller drill bit and a plurality of cutting teeth. The three-roller drill bit is coaxially arranged at the lower end of the drill rod. The plurality of cutting tooth rings are arranged on the outer periphery of the three-roller drill bit and connected to the drill rod. The cutting teeth are arranged corresponding to the peripheral wall of the rotating drum along the up and down directions.

[0009] Furthermore, the drill bit mechanism also includes a scraper, which is connected to the lower end of the conveying platform, and the side of the scraper facing away from the conveying platform is gradually inclined downward.

[0010] Furthermore, the transmission assembly includes a sleeve, a co-located gear and an inner ring gear, the sleeve is fixedly mounted on the outer periphery of the inner drive connecting rod, the co-located gear is mounted on the outer periphery of the inner drive connecting rod and is fixedly connected to the sleeve, the inner ring gear is mounted on the outer periphery of the co-located gear and is transmission-connected to the co-located gear, and the inner ring gear is coaxially connected to the rotating drum.

[0011] Furthermore, the driving mechanism includes a driving motor and a driving gear shaft, a driving gear is fixedly sleeved on the inner driving connecting rod, a power output end of the driving motor is drivingly connected to the driving gear shaft, and the driving gear shaft is drivingly connected to the driving gear.

[0012] Furthermore, it comprises two driving mechanisms, and the two driving gear shafts of the two driving mechanisms are both drivingly connected with the driving gear.

[0013] Furthermore, the mobile drilling rig includes a drilling platform, a lifting mechanism and a track wheel group, the track wheel group is arranged at the bottom of the drilling platform and is rotatably connected to the drilling platform, the lifting mechanism is arranged on the drilling platform, and the sampling drill is connected to the drilling platform through the lifting mechanism.

[0014] Furthermore, the lifting mechanism includes a lifting component and an adjusting support shaft, the lifting component is arranged on the drilling platform, the adjusting support shaft is connected to the lifting component and can be moved up and down through the lifting component, and the sampling drill is rotatably connected to the adjusting support shaft.

[0015] Furthermore, the track wheel assembly includes a wheel frame, a driving member, a driving wheel, a tensioning wheel and a track, the wheel frame is connected to the drilling platform, the driving wheel and the tensioning wheel are both rotatably arranged on the wheel frame, the track sleeve is arranged on the outer periphery of the driving wheel and the tensioning wheel and is respectively connected to the driving wheel and the tensioning wheel in transmission, and the driving member is arranged on the wheel frame and is connected to the driving wheel in transmission.

[0016] Further, the crawler wheel set further includes a support wheel and two tension wheels. The two tension wheels are respectively arranged on both sides of the driving wheel and are both located below the driving wheel. The support wheel is arranged between the two tension wheels. The crawler is sleeved on the support wheel and is in transmission connection with the support wheel.

[0017] Compared with the prior art, the beneficial effect of the geotechnical drilling and sampling device according to the embodiment of the present invention lies in:

[0018] In the geotechnical drilling and sampling device according to the embodiment of the present invention, the inner driving connecting rod is connected to the drill pipe at the lower end. When the inner driving connecting rod rotates under the driving of the driving mechanism, the drill pipe will also rotate at a high speed, driving the drill bit mechanism to extrude and crush the surface soil. And a transmission assembly is further arranged outside the inner driving connecting rod, so that the drill cylinder connected to the transmission assembly also rotates under the drive of the inner driving connecting rod. In this way, both the drill cylinder and the drill pipe can perform drilling operations. While the drill pipe drives the drill bit mechanism to break the soil and probe downward, the drill cylinder continuously rotates to compact the soil at the edge of the hole, making the inner wall of the hole smooth. This not only reduces the frictional resistance between the drill cylinder and the upper soil layer during penetration, but also effectively avoids the soft soil layer closing towards the center of the drill pipe during the initial drilling process, resulting in the situation of hole backfilling after the equipment is withdrawn. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the geotechnical drilling and sampling device according to the embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of the sampling drill in the geotechnical drilling and sampling device according to the embodiment of the present invention;

[0021] Figure 3 is a sectional view of the sampling drill in the geotechnical drilling and sampling device according to the embodiment of the present invention;

[0022] Figure 4 is a partial sectional view of the sampling drill in the geotechnical drilling and sampling device according to the embodiment of the present invention;

[0023] Figure 5 is a schematic structural diagram of the transmission mechanism and the driving mechanism in the geotechnical drilling and sampling device according to the embodiment of the present invention;

[0024] Figure 6 is a schematic structural diagram of the drill bit mechanism in the geotechnical drilling and sampling device according to the embodiment of the present invention;

[0025] Figure 7 is a schematic structural diagram of the crawler wheel set in the geotechnical drilling and sampling device according to the embodiment of the present invention;

[0026] Figure 8 is a schematic internal structure diagram of the crawler wheel set in the geotechnical drilling and sampling device according to the embodiment of the present invention.

[0027] In the figure, 1 is a sampling drill tool; 11 is a transmission mechanism; 111 is a transmission sleeve; 112 is an inner drive connecting rod; 113 is a transmission component; 1131 is a seal; 1132 is a coaxial gear; 1133 is an inner ring gear; 114 is a drive gear; 12 is a drill bit mechanism; 121 is a three-cone bit; 122 is a cutting tooth; 123 is a scraper; 13 is a drive mechanism; 131 is a drive motor; 132 is a drive gear shaft; 133 is a speed reduction component; 14 is a discharge pipe; 15 is a drill barrel; 151 is a discharge port; 16 is a drill pipe; 161 is a transfer platform.

[0028] 2 is a mobile drill rig; 21 is a drilling platform; 22 is a lifting mechanism; 221 is a lifting component; 222 is an adjusting support shaft; 23 is a crawler wheel set; 231 is a wheel frame; 233 is a drive wheel; 234 is a tensioning wheel; 235 is a crawler; 236 is a support wheel; 237 is a brake; 238 is a shock absorber frame; 24 is a cross chassis; 25 is a steering straight shaft. Specific embodiments

[0029] The following will further describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. used in the present invention indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "connected", "connected", "fixed", etc. used in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or a welded connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The terms "first", "second", etc. are used in the present invention to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information.

[0033] Referring to Figures 1 to 4 , a geotechnical drilling and sampling device according to an embodiment of the present invention includes: a sampling drill 1 and a mobile drill rig 2. The sampling drill 1 is disposed on the mobile drill rig 2. The sampling drill 1 includes a transmission mechanism 11, a drill bit mechanism 12, a driving mechanism 13, a discharge pipe 14, and a drill barrel 15 and a drill rod 16 that both extend in the vertical direction;

[0034] The drill bit mechanism 12 is disposed at the lower end of the drill rod 16. A helically rising conveying platform 161 is provided on the outer peripheral wall of the drill rod 16. The rotating cylinder is coaxially sleeved on the outer periphery of the conveying platform 161;

[0035] The transmission mechanism 11 includes a transmission sleeve 111, an inner driving connecting rod 112, and a transmission assembly 113. The transmission sleeve 111 is sleeved on the upper end of the rotating cylinder and is rotatably connected to the rotating cylinder through a bearing. The upper end of the drill rod 16 is coaxially connected to the lower end of the inner driving connecting rod 112. The outer peripheral wall of the inner driving connecting rod 112 is drivingly connected to the rotating cylinder through the transmission assembly 113. A discharge port 151 communicating with the upper end of the conveying platform is provided on the outer peripheral wall of the rotating cylinder. The discharge pipe 14 passes through the outer peripheral wall of the transmission sleeve 111 from outside to inside and communicates with the discharge port 151.

[0036] The driving mechanism 13 is disposed at the upper end of the transmission sleeve and is drivingly connected to the inner driving connecting rod 112. The driving mechanism 13 drives the drill rod 16 and the drill bit mechanism 12 to rotate through the inner driving connecting rod 112. The drill bit mechanism 12 drills in the rock and soil layer. The rock and soil sample is conveyed upward through the conveying platform 161 and discharged through the discharge port 151 and the discharge pipe 14.

[0037] The inner driving connecting rod 112 is connected to the lower drill rod 16. When the inner driving connecting rod 112 rotates under the action of the driving mechanism 13, the drill rod 16 will also rotate at a high speed, driving the drill bit mechanism 12 to extrude and crush the surface soil; and a transmission assembly 113 is further provided on the outer side of the inner driving connecting rod 112, so that the drill barrel 15 connected to the transmission assembly 113 also rotates under the drive of the inner driving connecting rod 112. In this way, both the drill barrel 15 and the drill rod 16 can perform drilling operations. While the drill rod 16 drives the drill bit mechanism 12 to break the soil and probe downward, the drill barrel 15 continuously rotates to tamp the soil at the edge of the hole, making the inner wall of the hole smooth. This not only reduces the frictional resistance between the drill barrel 15 and the upper soil layer during penetration, but also effectively avoids the soft soil layer closing in towards the center of the drill rod 16 during the initial drilling process, resulting in the hole being backfilled after the equipment is withdrawn.

[0038] Specifically, the drill barrel 15 can be formed by connecting multiple sub-drill barrels 15 through flanges. The drill pipe 16 can also be formed by connecting multiple sub-drill pipes 16 through a locking shaft and a locking sleeve. With this multi-section splicing design for the drill barrel 15 and the drill pipe 16, the lengths of the drill barrel 15 and the drill pipe 16 can be replaced and adjusted according to different drilling depth requirements.

[0039] Referring to Figure 6 , in some embodiments of the present application, the drill bit mechanism 12 further includes a roller cone bit 121 and a plurality of cutting teeth 122. The roller cone bit 121 is coaxially arranged at the lower end of the drill pipe 16. The plurality of cutting teeth 122 are annularly arranged on the outer periphery of the roller cone bit 121 and are connected to the drill pipe 16. The cutting teeth 122 are arranged corresponding to the peripheral wall of the rotating cylinder in the up and down direction. In a preferred embodiment, a pressure compensator is provided at the upper end of the roller cone bit 121; there are a plurality of cutting teeth 122, and the plurality of cutting teeth 122 are arranged at equal intervals along the circumferential direction of the rotating cylinder. During drilling, the roller cone bit 121 is used to extrude and crush the surface soil outward. At the same time, the plurality of cutting teeth 122 rotate to break the soil and rock around the drill pipe 16, enabling the entire drill barrel 15 to enter the soil layer more quickly.

[0040] In some embodiments of the present application, the drill bit mechanism 12 further includes a scraper 123. The scraper 123 is connected to the lower end of the conveying platform 161, and the side of the scraper 123 facing away from the conveying platform 161 is gradually inclined downward. The drill barrel 15 and the internal drill pipe 16 rotate at high speed simultaneously. The scraper 123 at the front end is used to quickly lift the crushed rock layer and soil upward, and cooperate with the conveying platform 161 on the surface of the drill pipe 16 to timely discharge the soil from the discharge pipe 14 above the drill barrel 15. Specifically, the conveying platform 161 can be set in the shape of a spiral blade.

[0041] Referring to Figure 5 , in some embodiments of the present application, the transmission assembly 113 includes a sleeve 1131, a coaxial gear 1132, and an internal ring gear 1133. The sleeve 1131 is fixedly sleeved on the outer periphery of the inner driving link 112. The coaxial gear 1132 is sleeved on the outer periphery of the inner driving link 112 and is fixedly connected to the sleeve 1131. The internal ring gear 1133 is sleeved on the outer periphery of the coaxial gear 1132 and is in transmission connection with the coaxial gear 1132. The internal ring gear 1133 is coaxially connected to the rotating cylinder. Specifically, the sleeve 1131 is connected to the inner driving link 112 by bolts. The coaxial gear 1132 is located in the middle section of the sleeve 1131 and is connected to the sleeve 1131 by a flange. The internal ring gear 1133 is connected to the rotating cylinder by a flange.

[0042] In a preferred embodiment, the internal ring gear 1133 is also rotatably connected to the transmission sleeve 111 through a slewing bearing.

[0043] In some embodiments of the present application, the driving mechanism 13 includes a driving motor 131 and a driving gear shaft 132. A driving gear 114 is fixedly sleeved on the inner driving connecting rod 112. The power output end of the driving motor 131 is in transmission connection with the driving gear shaft 132, and the driving gear shaft 132 is in transmission connection with the driving gear 114, that is, the driving gear 114 and the driving gear shaft 132 are in meshing transmission. In a preferred embodiment, the driving mechanism 13 further includes a speed reduction assembly 133, and the power output end of the driving motor 131 is in transmission connection with the driving gear shaft 132 through the speed reduction assembly 133.

[0044] In some embodiments of the present application, there are two driving mechanisms 13, and the two driving gear shafts 132 of the two driving mechanisms 13 are both in transmission connection with the driving gear 114. Specifically, the two driving gear shafts 132 are oppositely arranged on the outer periphery of the driving gear 114. The two groups of driving motors 131 drive the driving gear 114 at the same time, further improving the drilling efficiency.

[0045] The support systems of existing geotechnical drilling and sampling devices mostly adopt fixed or simple hinge structures. When facing uneven ground such as slopes, gullies, and gravel accumulations, it is difficult to maintain the vertical state of the drill pipe 16 through adaptive adjustment. The contact stability between its support feet and the ground is insufficient, which is likely to cause equipment deviation or even tipping. In severe cases, it may lead to sampling angle deviation or equipment damage, restricting the exploration operation range under complex terrain conditions.

[0046] Therefore, in order to adapt to multi-terrain working conditions, in some embodiments of the present application, the mobile drill rig 2 includes a drilling platform 21, a lifting mechanism 22, and a crawler wheel set 23. The crawler wheel set 23 is arranged at the bottom of the drilling platform 21 and is rotationally connected to the drilling platform 21. The lifting mechanism 22 is arranged on the drilling platform 21, and the sampling drill 1 is connected to the drilling platform 21 through the lifting mechanism 22. In a preferred embodiment, the mobile drill rig 2 further includes a cross chassis 24 arranged at the bottom of the drilling platform 21. The cross chassis 24 can be fixed to the drilling platform 21 by bolts. There are multiple groups of crawler wheel sets 23, and they are all connected to the drilling platform 21 through the cross chassis 24. Specifically, a steering support shaft is arranged between each group of crawler wheel sets 23 and the cross chassis 24. The steering support shaft is telescopically connected to the cross chassis 24 and is rotationally connected to the crawler wheel set 23. Each group of crawler wheel sets 23 can be independently driven, and with the cooperation of the steering support shaft, it can perform in-situ steering operations, ensuring the normal operation of the equipment even in a relatively complex terrain environment. The entire drilling and sampling device of the present application consists of the sampling drill 1 responsible for drilling deep into the hole and the crawler-type mobile drill rig 2 responsible for movement.

[0047] In some embodiments of the present application, the lifting mechanism 22 includes a lifting component 221 and an adjusting support shaft 222. The lifting component 221 is provided on the drilling platform 21. The adjusting support shaft 222 is connected to the lifting component 221 and can move up and down through the lifting component 221. The sampling drill 1 is rotatably connected to the adjusting support shaft 222. In a preferred embodiment, two sets of lifting components 221 are provided, respectively located on both sides of the drilling platform 21, and the sampling drill 1 is provided between the two lifting components 221. Specifically, the lifting component 221 can be implemented by a hydraulic component.

[0048] Referring to Figure 7 , in some embodiments of the present application, the crawler wheel set 23 includes a wheel frame 231, a driving member, a driving wheel 233, a tensioning wheel 234, and a crawler 235. The wheel frame 231 is connected to the drilling platform 21. The driving wheel 233 and the tensioning wheel 234 are both rotatably provided on the wheel frame 231. The crawler 235 is sleeved on the outer circumferences of the driving wheel 233 and the tensioning wheel 234 and is respectively in transmission connection with the driving wheel 233 and the tensioning wheel 234. The driving member is provided on the wheel frame 231 and is in transmission connection with the driving wheel 233. The peripheral wall of the driving wheel 233 can be designed as a grid structure, and this structure can be well meshed with the grooves on the inner circumferential wall of the crawler 235 to achieve transmission connection, thereby effectively preventing the crawler 235 from slipping during driving. Specifically, the crawler 235 is a metal crawler 235, and the driving member can be set as a motor, and the motor can be provided between the driving wheel 233 and the steering support shaft.

[0049] Referring to Figure 8 , in some embodiments of the present application, the crawler wheel set 23 further includes a support wheel 236 and two tensioning wheels 234. The two tensioning wheels 234 are respectively provided on both sides of the driving wheel 233 and are both located below the driving wheel 233. The support wheel 236 is provided between the two tensioning wheels 234. The crawler 235 is sleeved on the support wheel 236 and is in transmission connection with the support wheel 236. The two tensioning wheels 234 are respectively distributed on both sides of the entire crawler wheel set 23, and together with the support wheel 236, they can enhance the contact area between the crawler 235 and the ground, avoiding the crawler 235 from sinking into the soil during driving. Specifically, the support wheel 236 is rotatably connected to the wheel frame 231, and multiple support wheels 236 can be provided.

[0050] Brakes 237 and shock-absorbing frames can be respectively provided on both sides of the driving wheel 233. One of the tensioning wheels 234 is connected to the brake 237, and the other tensioning wheel 234 is connected to the shock-absorbing frame, respectively playing the roles of braking and shock absorption.

[0051] The present invention also provides a sampling method for a geotechnical drilling sampling device, including the following steps:

[0052] S1 controls the mobile drill rig 2 to move the sampling drill tool 1 to the designated exploration area. After reaching the designated area, the brake 237 inside the crawler wheel set 23 locks up, and the drilling angle of the sampling drill tool 1 is adjusted by adjusting the support shaft 222. Then, the sampling drill tool 1 is driven by the lifting assembly 221 to rotate downward for drilling;

[0053] S2 The drill bit mechanism 12 at the front end of the sampling drill tool 1 uses the roller cone bit 121 to extrude and crush the surface soil outward. At the same time, the cutting teeth 122 break the surrounding soil and rock, enabling the entire drill barrel 15 to quickly enter the soil layer. The drill barrel 15 can effectively prevent the soft soil layer from closing in towards the center of the drill pipe 16 during the initial drilling process;

[0054] S3 While the drill barrel 15 rotates, the drill pipe 16 inside also rotates at a high speed. The crushed rock layer and soil are quickly output using the front shovel 123, and the soil is timely discharged upward from the inside of the drill barrel 15 through the transfer platform 161 on the outer peripheral wall of the drill pipe 16.

[0055] In summary, the embodiment of the present invention provides a geotechnical drilling and sampling device, which has the following advantages:

[0056] 1) The entire geotechnical drilling and sampling device is composed of the sampling drill tool 1 responsible for deep drilling and the crawler mobile drill rig 2 responsible for movement. Among them, multiple crawler wheel sets 23 are designed at the bottom of the drilling platform 21 of the mobile drill rig 2. Each crawler wheel set 23 can perform in-situ steering operations and can be independently driven in cooperation with the driving member, ensuring the normal operation of the equipment even in a relatively complex terrain environment;

[0057] 2) The roller cone bit 121 is used to extrude and crush the surface soil outward. At the same time, the cutting teeth 122 break the surrounding soil and rock, enabling the entire drill barrel 15 to quickly enter the soil layer. After the drill barrel 15 enters the soil layer under the action of the cutting teeth 122, it can compact the soil at the edge of the hole through its own rotation, making the inner wall of the hole smooth. This can not only reduce the frictional resistance between the drill barrel 15 and the upper soil layer during penetration but also effectively prevent the soft soil layer from closing in towards the center of the drill pipe 16 during the initial drilling process, resulting in the backfilling of the hole after the equipment is withdrawn;

[0058] 3) Two sets of driving mechanisms 13 are used to drive the driving gear 114 simultaneously, which can improve the drilling efficiency. The inner driving connecting rod 112 is connected to the drill pipe 16 at the lower end. When the inner driving connecting rod 112 rotates, the drill pipe 16 will also rotate at a high speed. A set of sleeves 1131 and coaxial gears 1132 are arranged outside the inner driving connecting rod 112. The coaxial gears 1132 can also rotate following the inner driving connecting rod 112. The transmission drill cylinder 15 meshed with the coaxial gears 1132 rotates at a high speed driven by the gears. In this way, both the drill cylinder 15 and the drill pipe 16 can perform drilling operations.

[0059] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A rock and soil drilling sampling device, characterized in that: include: A sampling drill and a mobile drill frame, wherein the sampling drill is arranged on the mobile drill frame, and comprises a transmission mechanism, a drill bit mechanism, a drive mechanism, a discharge pipe, and a drill barrel and a drill rod extending in the up-and-down direction; The drill head mechanism is arranged at the lower end of the drill rod, the outer peripheral wall of the drill rod is provided with a spirally ascending conveying platform, and the rotating drum is coaxially sleeved on the outer periphery of the conveying platform; The transmission mechanism includes a transmission sleeve, an inner drive connecting rod and a transmission assembly, wherein the transmission sleeve is sleeved on the upper end of the rotating drum and is rotatably connected to the rotating drum, the upper end of the drill rod is coaxially connected to the lower end of the inner drive connecting rod, the outer peripheral wall of the inner drive connecting rod is transmission-connected to the rotating drum through the transmission assembly, a discharge port communicating with the upper end of the conveying platform is provided on the outer peripheral wall of the rotating drum, and the discharge pipe is penetrated from the outside to the inside through the outer peripheral wall of the transmission sleeve and is communicated with the discharge port; The driving mechanism is arranged at the upper end of the transmission sleeve and is transmission-connected with the inner driving connecting rod.

2. The rock drilling sampling device according to claim 1, characterized in that: The drill bit mechanism also includes a three-cone drill bit and a plurality of cutting teeth. The three-cone drill bit is coaxially arranged at the lower end of the drill rod. The plurality of cutting tooth rings are arranged on the outer periphery of the three-cone drill bit and connected to the drill rod. The cutting teeth are arranged corresponding to the peripheral wall of the rotating drum along the up and down directions.

3. The rock drilling sampling device according to claim 1, characterized in that: The drill mechanism also includes a scraper, which is connected to the lower end of the conveying platform, and the side of the scraper facing away from the conveying platform is gradually inclined downward.

4. The rock drilling sampling device according to claim 1, characterized in that: The transmission assembly includes a sleeve, a co-located gear and an inner ring gear. The sleeve is fixedly mounted on the outer periphery of the inner drive connecting rod. The co-located gear is mounted on the outer periphery of the inner drive connecting rod and is fixedly connected to the sleeve. The inner ring gear is mounted on the outer periphery of the co-located gear and is transmission-connected to the co-located gear. The inner ring gear is coaxially connected to the rotating drum.

5. The rock drilling sampling device according to claim 1, characterized in that: The driving mechanism comprises a driving motor and a driving gear shaft. A driving gear is fixedly sleeved on the inner driving connecting rod. The power output end of the driving motor is drivingly connected to the driving gear shaft, and the driving gear shaft is drivingly connected to the driving gear.

6. The rock drilling sampling device according to claim 5, characterized in that: It comprises two driving mechanisms, and the two driving gear shafts of the two driving mechanisms are both drivingly connected with the driving gear.

7. The rock drilling sampling device according to claim 1, characterized in that: The mobile drilling rig includes a drilling platform, a lifting mechanism and a track wheel group. The track wheel group is arranged at the bottom of the drilling platform and is rotatably connected to the drilling platform. The lifting mechanism is arranged on the drilling platform. The sampling drill is connected to the drilling platform through the lifting mechanism.

8. The rock drilling sampling device according to claim 7, characterized in that: The lifting mechanism comprises a lifting assembly and an adjusting support shaft. The lifting assembly is arranged on the drilling platform. The adjusting support shaft is connected to the lifting assembly and can be moved up and down by the lifting assembly. The sampling drill is rotatably connected to the adjusting support shaft.

9. The rock drilling sampling device according to claim 7, characterized in that: The track wheel assembly includes a wheel frame, a driving member, a driving wheel, a tensioning wheel and a track; the wheel frame is connected to the drilling platform; the driving wheel and the tensioning wheel are both rotatably arranged on the wheel frame; the track sleeve is arranged on the outer periphery of the driving wheel and the tensioning wheel and is respectively connected to the driving wheel and the tensioning wheel in transmission; the driving member is arranged on the wheel frame and is connected to the driving wheel in transmission.

10. The rock drilling sampling device according to claim 9, characterized in that: The track wheel assembly also includes a supporting wheel and two tensioning wheels, the two tensioning wheels are respectively arranged on both sides of the driving wheel and are both located below the driving wheel, the supporting wheel is arranged between the two tensioning wheels, and the track sleeve is arranged on the supporting wheel and is transmission-connected to the supporting wheel.

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