Drilling rig for lithium ore exploration sampling

Abstract

The invention relates to a drilling rig for lithium ore exploration sampling, and belongs to the field of geological exploration equipment, the drilling rig comprises a fixing frame, a driving mechanism, an excavation drill rod and a sampling drill bit, the sampling drill bit comprises a sampling barrel and a sampling auger, the excavation drill rod comprises a screw-in drill rod and a straight drill rod, and the sampling auger comprises a center rod and a spiral blade; the center rod is connected to the end of the screw-in drill rod, the sampling barrel is connected to the end of the straight drill rod, the spiral blade comprises a plurality of fixed pieces and a plurality of movable pieces, the fixed pieces and the movable pieces are alternately arranged along the track of the spiral blade, a soil falling space for the movable pieces to exist is formed between every two adjacent fixed pieces, and the fixed pieces are fixedly connected with the side wall of the center rod. The movable piece and the center rod are movably connected relatively. Opening or closing of the soil falling space is controlled through movement of the movable piece relative to the center rod, the soil falling space is closed during drilling, the spiral blade works normally, the soil falling space is opened during sample collection, rock soil is smoothly discharged out of the sampling barrel, and the sampling efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of geological exploration equipment, and in particular to a drilling device for lithium ore exploration and sampling. Background Art

[0002] Lithium ore refers to naturally generated lithium resources that can be economically mined. More than 150 lithium minerals and lithium-containing ores have been discovered in nature. The main mineral raw materials for producing lithium are spodumene, lepidolite, pyroxenite, petalite and ferrolithium mica.

[0003] Before the formal mining of lithium ore, the geological conditions of the mine site must be surveyed first, and drilling equipment with sampling function is required. In the related technology, the drilling equipment includes a frame, a drive mechanism, a drill rod and a drill bit. The drive mechanism is used to control the lifting and rotation of the drill rod relative to the frame. The drill bit is located at the end of the drill rod. The drill bit includes a sampling barrel and a sampling auger. The sampling auger is located inside the sampling barrel and the two are coaxial. The sampling auger can rotate relative to the sampling barrel. When the drill bit goes deep into the ground, the underground rock and soil materials enter the sampling barrel. The sampling auger rotates to improve the smoothness of drilling and soil sampling. When the blades of the sampling auger carry a certain amount of rock and soil, the drill rod is lifted until the drill bit is above the ground. During this process, the sampling auger remains relatively still relative to the sampling barrel, and the rock and soil materials inside it can remain stable. Then the sampling auger is removed from the sampling barrel, and the rock and soil collected by it can be taken out.

[0004] According to the above operation process, it is known that when on the ground, the sampling auger and the sampling barrel must be relatively separated before the rock and soil samples can be taken out, and then the two are combined to continue drilling. The operation process is relatively cumbersome, resulting in reduced drilling efficiency. Summary of the invention

[0005] In order to improve the above problems, the present application provides a drilling device for lithium ore exploration and sampling.

[0006] The present application provides a drilling device for lithium ore exploration and sampling, which adopts the following technical solution: A drilling device for lithium ore exploration and sampling, comprising a fixed frame, a driving mechanism, an excavation drill rod and a sampling drill bit, the sampling drill bit is located at the end of the excavation drill rod, the sampling drill bit comprises a sampling barrel and a sampling auger, the excavation drill rod comprises a screw-in drill rod and a straight drill rod, the driving mechanism is used to control the rotation and vertical movement of the screw-in drill rod relative to the fixed frame, and control the vertical movement of the straight drill rod, the sampling auger comprises a center rod and spiral blades located around the center rod, the center rod is coaxially connected to the end of the screw-in drill rod, the sampling barrel is fixedly connected to the end of the straight drill rod, the spiral blades comprise a plurality of fixed plates and a plurality of movable plates, the fixed plates and the movable plates are alternately arranged along the trajectory of the spiral blades, and a soil-falling space for the movable plate is formed between two adjacent fixed plates, the fixed plate is fixedly connected to the side wall of the center rod, and the movable plate and the center rod are relatively movably connected.

[0007] By adopting the above technical solution, the spiral blade can form a soil falling space through the movement of the movable plate after the spiral sampling is completed. The rock and soil materials carried by the spiral blade can directly slide out of the sampling tube through the soil falling space. There is no need to remove the sampling auger from the sampling tube, thereby improving the operating efficiency.

[0008] Preferably, the movable sheet and the central rod slide relative to each other, and the sliding direction is parallel to the trajectory of the spiral blade.

[0009] By adopting the above technical solution, the movable sheet slides relative to the central rod, and then the movable sheet slides to a position where it overlaps with the fixed sheet, and at this time the soil-falling space is opened.

[0010] Preferably, an adjustment space is opened in the center rod, an adjustment rod is coaxially sleeved in the center rod, an adjustment slot hole connected to the adjustment space is opened on the side wall of the center rod, the trajectory of the adjustment slot hole is parallel to the trajectory of the spiral blade, a connecting part is fixedly connected to the movable plate, the connecting part passes through the adjustment slot hole and is fixedly connected to the adjustment rod, the two ends of the adjustment slot hole are a working part and a soil falling part respectively, when the connecting part is located at the working part, the movable plate closes the soil falling space, and when the connecting part is located at the soil falling part, the movable plate is located above the fixed plate.

[0011] By adopting the above technical solution, the adjusting rod is spirally rotated relative to the central rod, thereby controlling all movable pieces to synchronously spirally rotate to change their own positions.

[0012] Preferably, an operating slot is provided on the center rod, the trajectory of the operating slot is parallel to the trajectory of the spiral blade, an operating pin is fixedly connected to the adjusting rod, one end of the operating pin is fixedly connected to the side wall of the adjusting rod, and the other end extends from the operating slot, and a limiting member is slidably provided on the center rod, and the limiting member is used to control the change of the fixed state of the operating pin in the operating slot.

[0013] Preferably, the limiting member is a limiting slide rod, the sliding direction of the limiting slide rod is parallel to the axis of the center rod, the height of the working part is lower than the height of the soil landing part, when the movable sheet is located in the working part, the side wall of the limiting slide rod abuts against the side wall of the operating pin, and a limiting cylinder is provided on the rod wall of the center rod for the limiting slide rod to be coaxially inserted.

[0014] By adopting the above technical solution, the operating pin, the adjusting rod and each movable piece are fixed to each other, and their movable states are also kept consistent. The limiting slide rod and the inner wall of the end of the operating slot hole clamp and abut the operating pin in opposite directions, so that the operating pin remains stable in the operating slot hole, that is, each movable piece is located in the working part and remains relatively fixed with the center rod.

[0015] Preferably, a thrust block is fixedly connected to the fixing frame, and the thrust block is used to abut against a side of the operating pin that is away from the limiting sliding rod.

[0016] By adopting the above technical solution, after the limit slide rod is pulled out, the thrust block and the operating pin originally abut against the side facing away from the limit slide rod and when the center rod rotates relative to the thrust block, the operating pin is subjected to thrust and moves along the operating slot, thereby realizing the spiral rotation control of the adjusting rod.

[0017] Preferably, a retaining plate is slidably provided on the fixed frame, the plate surface of the retaining plate is a vertical plane, the sliding direction is the radial direction of the sampling tube, a soil-moving gap for inserting the retaining plate is opened on the wall of the sampling tube, the height of the retaining plate is smaller than the spiral lead of the spiral blade, and a sealing elastic strip is fixedly connected on the wall of the sampling tube and in the soil-moving gap, and in a natural state, the sealing elastic strip closes the soil-moving gap.

[0018] By adopting the above technical solution, the retaining plate extends into the sampling tube, and when the sampling auger rotates, the retaining plate moves relative to the sampling auger. The rock and soil on the spiral blades move due to the relative push of the retaining plate, and are more likely to fall through the soil falling space.

[0019] Preferably, a scraper strip is slidably provided below the retaining plate, and the sliding direction is vertical. The scraper strip is used to contact the upper surface of the spiral blade. A control component for controlling the sliding of the scraper strip is provided on the retaining plate.

[0020] By adopting the above technical solution, when the retaining plate passes through the soil-moving gap, the scraper strips need to be retracted into the retaining plate. When the retaining plate is completely located in the thread gap of the spiral blade, the scraper strips need to move downward and extend from the lower edge of the retaining plate to contact and abut the movable plate or the fixed plate.

[0021] Preferably, the control component includes a push slide, a force-bearing slide and a return spring, the force-bearing slide and the scraper strip are fixedly connected, the push slide and the force-bearing slide are both slidably connected to the earth retaining plate and the plate surfaces are parallel to each other, the sliding direction of the push slide is parallel to the sliding direction of the earth retaining plate, the sliding direction of the force-bearing slide is vertical, the push slide is provided with a thrust wedge surface, the force-bearing slide is provided with a response wedge surface, the thrust wedge surface abuts against the response wedge surface, one end of the return spring is connected to the earth retaining plate, and the other end is connected to the force-bearing slide. In a natural state, the scraper strip is located inside the earth retaining plate, the edge of the push slide extends from the earth retaining plate toward one end of the center rod, and an abutment ball is embedded in the end of the push slide close to the center rod, and the abutment ball is used to abut against the side wall of the center rod.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the setting of the fixed plate and the movable plate, the spiral blade can form a soil falling space through the activity of the movable plate after the spiral sampling is completed. The rock and soil materials carried by the spiral blade slide directly out of the sampling tube through the soil falling space, and there is no need to remove the sampling auger from the sampling tube, which improves the operation efficiency; 2. Through the setting of the retaining plate, during the process of extracting the sampled rock and soil, the retaining plate is extended into the sampling tube, the sampling auger rotates, and the rock and soil on the spiral blades abut against the retaining plate. Under the relative propulsion of the retaining plate, the rock and soil can more easily reach the soil falling space, thereby improving the soil falling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a drilling device for lithium ore exploration and sampling in an embodiment of the present application.

[0024] Figure 2 It is a structural schematic diagram used to embody the sampling auger in the embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the control principle structure of the adjustment rod in the embodiment of the present application.

[0026] Figure 4 It is a schematic structural cross-sectional view used to illustrate the working principle of the retaining plate in the embodiment of the present application.

[0027] Description of reference numerals: 1, fixed frame; 11, driving mechanism; 12, thrust block; 13, lifting cylinder; 2, digging drill rod; 21, screwing drill rod; 22, straight drill rod; 3, sampling drill bit; 31, sampling tube; 311, soil-moving gap; 312, sealing elastic strip; 32, sampling auger; 321, center rod; 3211, adjusting slot; 3212, working part; 3213, soil-falling part; 3214, operating slot; 322, spiral blade; 3221, movable piece; 3222, connecting part; 3223, fixed piece; 323, adjusting rod; 3231, operating pin; 324, limiting slide rod; 325, limiting cylinder; 4, earth retaining plate; 41, scraper strip; 42, control assembly; 421, push slide plate; 422, thrust wedge surface; 423, force slide plate; 424, response wedge surface; 425, return spring; 426, abutting ball. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] The present application embodiment discloses a drilling device for lithium ore exploration and sampling, such as Figure 1 As shown, it includes a fixed frame 1, a driving mechanism 11, an excavation drill rod 2 and a sampling drill bit 3. The fixed frame 1 is fixedly arranged on the ground, and the sampling drill bit 3 is located at the lower end of the drill rod. The driving mechanism 11 is used to control the excavation drill rod 2 and the drill bit to drill into the ground below the fixed frame 1 and collect rock and soil samples.

[0030] like Figure 1 and 2 As shown, the sampling drill bit 3 includes a sampling barrel 31 and a sampling auger 32, and the excavation drill rod 2 includes a screw-in drill rod 21 and a straight drill rod 22. There are two straight drill rods 22 and they are respectively located on opposite sides of the screw-in drill rod 21. The length directions of the three drill rods are parallel and vertical. The sampling auger 32 is located in the sampling barrel 31 and the two are coaxial. The sampling auger 32 includes a center rod 321 and a spiral blade 322 located around the center rod 321. The center rod 321 is coaxially connected to the lower end of the screw-in drill rod 21, and the sampling barrel 31 is fixedly connected to the lower end of the straight drill rod 22. The driving mechanism 11 can control the screw-in drill rod 21 to rotate and move vertically relative to the fixed frame 1, and control the vertical movement of the straight drill rod 22. When the drill bit is drilling downward, the sampling auger 32 rotates in the sampling barrel 31, and the spiral blades 322 can carry the rock and soil materials in the sampling barrel 31 while drilling into the rock and soil. After each drilling, the drilling rod 2 is lifted to move the drill bit out of the ground, and the rock and soil materials in the sampling barrel 31 can be discharged and collected.

[0031] like Figure 1 and 2As shown, the spiral blade 322 is spirally coaxially wound around the center rod 321, and the spiral blade 322 includes a plurality of fixed pieces 3223 and a plurality of movable pieces 3221. The fixed pieces 3223 and the movable pieces 3221 are alternately arranged along the track of the spiral blade 322, the fixed pieces 3223 and the side wall of the center rod 321 are fixedly connected, and the movable pieces 3221 and the center rod 321 are relatively movable. A soil falling space for the movable pieces 3221 is formed between two adjacent fixed pieces 3223. When the sampling drill 3 is screwed downward, the movable pieces 3221 are located at the soil falling space to close it, and the spiral blade 322 is in a complete auger shape; when the sample is discharged and collected on the ground, the movable pieces 3221 will move relative to the center rod 321 to open the soil falling space, so that a channel space is formed on the spiral blade 322 to allow the rock and soil to fall.

[0032] like Figure 1 and 2 As shown, the center rod 321 is hollow and has an adjustment space therein. An adjustment rod 323 is coaxially sleeved inside the center rod 321. An adjustment slot 3211 connected to the adjustment space is provided on the side wall of the center rod 321. The trajectory of the adjustment slot 3211 is parallel to the spiral trajectory of the spiral blade 322. The number of the adjustment slots 3211 is consistent with the number of the movable plates 3221 and the two correspond one to one. The trajectory of the adjustment slot 3211 is the sliding trajectory of the movable plate 3221 relative to the center rod 321. A single adjustment slot 3211 is located between two adjacent fixed plates 3223. A connecting portion 3222 is fixedly connected to the movable sheet 3221, and the connecting portion 3222 passes through the adjusting slot 3211 and is fixedly connected to the adjusting rod 323. The two ends of the adjusting slot 3211 are respectively the working portion 3212 and the soil falling portion 3213. The soil falling portion 3213 is higher than the working portion 3212. When the connecting portion 3222 is located at the working portion 3212, the movable sheet 3221 closes the soil falling space. When the connecting portion 3222 is located at the soil falling portion 3213, the movable sheet 3221 is located above the fixed sheet 3223. In this embodiment, one circle span of the spiral blade 322 includes two fixed plates 3223 and two movable plates 3221; the rotation of the adjusting rod 323 can simultaneously control the synchronous movement of all movable plates 3221. During the drilling process, the movable plates 3221 are located at the working part 3212. When discharging the sample, the adjusting rod 323 spirally rotates 90° relative to the center rod 321, and the movable plates 3221 move to the soil landing part 3213. A single movable plate 3221 is located above a fixed plate 3223, that is, the two are stacked on each other, and the soil landing space is given up.

[0033] like Figure 1 , 2As shown in FIG. 3 , an operation slot 3214 is provided on the center rod 321 and above the sampling drill bit 3. The trajectory of the operation slot 3214 is parallel to the trajectory of the spiral blade 322, and is also spiral-shaped, with a circumferential span of 90°. An operation pin 3231 is fixedly connected to the adjustment rod 323. One end of the operation pin 3231 is fixedly connected to the side wall of the adjustment rod 323, and the other end extends from the operation slot 3214. When the operation pin 3231 is located at the lower end of the operation slot 3214, the movable sheet 3221 is located at the working part 3212. A limiter is slidably provided on the center rod 321, and the limiter is used to control and change the fixed state of the operation pin 3231 in the operation slot 3214. The limiting member is a limiting slide bar 324, the sliding direction of which is parallel to the axis of the center rod 321, and a limiting cylinder 325 is provided on the rod wall of the center rod 321 for the limiting slide bar 324 to be coaxially inserted into. When the movable sheet 3221 is located at the working part 3212, the limiting slide bar 324 is inserted into the limiting cylinder 325 from top to bottom, and the side wall of the limiting slide bar 324 abuts against the side wall of the operating pin 3231, and the lower end hole wall of the operating slot hole 3214 and the limiting slide bar 324 clamp and abut against the operating pin 3231, so that the operating pin 3231 cannot move, and the adjusting rod 323 and the center rod 321 maintain a relatively stable angular relationship.

[0034] like Figure 3 As shown, a thrust block 12 is fixedly connected to the fixing frame 1 and located beside the screwed-in drill rod 21, and a lifting cylinder 13 is fixedly arranged on the fixing frame 1, and an electromagnet is fixedly arranged at the piston rod end of the lifting cylinder 13. When the screwed-in drill rod 21 is lifted to the position where the operating slot 3214 is located at the same height as the thrust block 12, the piston rod of the lifting cylinder 13 moves down and activates the electromagnet, and the limit slide bar 324 is lifted out of the limit cylinder 325 by magnetic attraction, and the position limiting effect of the limiter on the operating pin 3231 is released. Then the screwed-in drill rod 21 is spirally rotated, so that the thrust block 12 and the operating pin 3231 originally away from the limit slide bar 324 abut against each other, and continue to spirally rotate, and the operating pin 3231 can move along the operating slot 3214, so that the adjustment rod 323 carries each movable piece 3221 to spirally rotate relative to the center rod 321 to open the soil landing space. The thrust block 12 can rotate one circle relative to the central rod 321 , that is, a single retaining plate 4 can move one circle relative to the sampling auger 32 when entering the soil-moving gap 311 once.

[0035] like Figure 1 and 4As shown, a plurality of retaining plates 4 are slidably arranged on the fixed frame 1, the plate surface of the retaining plates 4 is a vertical plane, the sliding direction is the radial direction of the sampling tube 31, the retaining plates 4 are distributed on the opposite sides of the sampling tube 31, and a cylinder for controlling the movement of the retaining plates 4 is arranged on the fixed frame 1. A soil-moving gap 311 for inserting the retaining plates 4 is provided on the wall of the sampling tube 31, and a sealing elastic strip 312 made of rubber material is fixedly connected on the wall of the sampling tube 31 and in the soil-moving gap 311. In a natural state, the sealing elastic strip 312 closes the soil-moving gap 311, and the retaining plates 4 can push the sealing elastic strip 312 open when passing through the soil-moving gap 311. After the retaining plate 4 enters the sampling tube 31, it is located in the spiral gap of the spiral blade 322. In order to improve the smoothness of the retaining plate 4 entering the spiral gap, the height of the retaining plate 4 is smaller than the spiral lead of the spiral blade 322. When the sampling auger 32 carrying the sampling tube 31 spirally rotates, the sampling tube 31 and the retaining plate 4 remain stationary relative to the fixed frame 1, and the retaining plate 4 has a pushing effect on the rock and soil on the spiral blade 322.

[0036] like Figure 4As shown, a scraper strip 41 made of hard rubber is slidingly provided under the retaining plate 4, and the sliding direction is vertical. When the retaining plate 4 passes through the soil-moving gap 311, the scraper strip 41 needs to be retracted into the retaining plate 4. When the retaining plate 4 is completely located in the thread gap of the spiral blade 322, the scraper strip 41 needs to move downward and extend from the lower edge of the retaining plate 4, and contact and abut with the movable plate 3221 or the fixed plate 3223. A control component 42 for controlling the sliding of the scraper strip 41 is provided on the retaining plate 4. The control assembly 42 includes a push slide 421, a force slide 423 and a return spring 425. The force slide 423 is fixedly connected to the scraper strip 41. The push slide 421 and the force slide 423 are both slidably connected to the retaining plate 4 and the plate surfaces are parallel to each other. The sliding direction of the push slide 421 is parallel to the sliding direction of the retaining plate 4. The sliding direction of the force slide 423 is also vertical to the scraper strip 41. The push slide 421 is provided with a thrust wedge surface 422, and the force slide 423 is provided with a response wedge surface 424. The thrust wedge surface 422 is in contact with the response wedge surface 424. One end of the return spring 425 is connected to the retaining plate 4, and the other end is connected to the retaining plate 4. The end of the push plate 422 is connected to the force-bearing slide plate 423, and the return spring 425 applies an upward pulling force to the force-bearing slide plate 423. In the natural state, the scraper strip 41 is located in the retaining plate 4, and the edge of the push plate 421 extends from the retaining plate 4 toward one end of the center rod 321. The end of the push plate 421 close to the center rod 321 is embedded with a contact ball 426. When the retaining plate 4 enters the thread gap between the spiral blades 322, the contact ball 426 rolls and abuts against the side wall of the center rod 321, thereby pushing the push plate 421 to move, and the force-bearing slide plate 423 is moved downward through the wedge surface transmission, and the scraper strip 41 extends from the lower edge of the retaining plate 4. The telescopic distance of the scraper strip 41 is greater than the thickness of the movable sheet 3221, so that the scraper strip 41 can scrape the movable sheet 3221 and the fixed sheet 3223 by friction.

[0037] The implementation principle of a drilling device for lithium ore exploration and sampling in the embodiment of the present application is as follows: During normal drilling and rotary excavation, the movable piece 3221 is located in the soil falling space; after a single drilling sampling is completed and the sampling drill bit 3 is lifted above the ground, the lifting cylinder 13 pulls out the limit slide rod 324, and the retaining plate 4 is laterally inserted into the sampling tube 31, and the drill rod 21 is screwed in and rotated spirally. When the side of the operating pin 3231 abuts the thrust block 12, the fixed piece 3223 continues to rotate spirally while the movable piece 3221 remains stationary, and the soil falling space is opened. The rock and soil on the spiral blade 322 can fall through the soil falling space after being pushed by the retaining plate 4.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A drilling device for lithium ore exploration and sampling, comprising a fixed frame (1), a driving mechanism (11), an excavation drill rod (2) and a sampling drill bit (3), wherein the sampling drill bit (3) is located at the end of the excavation drill rod (2), the sampling drill bit (3) comprises a sampling barrel (31) and a sampling auger (32), the excavation drill rod (2) comprises a screw-in drill rod (21) and a straight drill rod (22), the driving mechanism (11) is used to control the rotation and vertical movement of the screw-in drill rod (21) relative to the fixed frame (1), and to control the vertical movement of the straight drill rod (22), the sampling auger (32) comprises a center rod (321) and a spiral blade (322) located around the center rod (321), the center rod (321) is coaxially connected to the end of the screw-in drill rod (21), and the sampling barrel (31) is fixedly connected to the end of the straight drill rod (22), characterized in that: The spiral blade (322) comprises a plurality of fixed plates (3223) and a plurality of movable plates (3221); the fixed plates (3223) and the movable plates (3221) are alternately arranged along the trajectory of the spiral blade (322); a soil-falling space for the movable plates (3221) is formed between two adjacent fixed plates (3223); the fixed plates (3223) and the side walls of the center rod (321) are fixedly connected; and the movable plates (3221) and the center rod (321) are relatively movably connected.

2. A drilling device for lithium ore exploration and sampling according to claim 1, characterized in that: The movable sheet (3221) and the central rod (321) slide relative to each other, and the sliding direction is parallel to the trajectory of the spiral blade (322).

3. A drilling device for lithium ore exploration and sampling according to claim 2, characterized in that: An adjustment space is provided in the center rod (321), an adjustment rod (323) is coaxially sleeved in the center rod (321), an adjustment slot (3211) communicating with the adjustment space is provided on the side wall of the center rod (321), the trajectory of the adjustment slot (3211) is parallel to the trajectory of the spiral blade (322), a connecting portion (3222) is fixedly connected to the movable sheet (3221), and the connecting portion (3222) passes through the adjustment slot The hole (3211) is fixedly connected to the adjusting rod (323); the two ends of the adjusting slot hole (3211) are respectively a working part (3212) and a soil landing part (3213); when the connecting part (3222) is located at the working part (3212), the movable piece (3221) closes the soil landing space; when the connecting part (3222) is located at the soil landing part (3213), the movable piece (3221) is located above the fixed piece (3223).

4. A drilling device for lithium ore exploration and sampling according to claim 3, characterized in that: An operating slot (3214) is provided on the center rod (321), and the trajectory of the operating slot (3214) is parallel to the trajectory of the spiral blade (322). An operating pin (3231) is fixedly connected to the adjusting rod (323), and one end of the operating pin (3231) is fixedly connected to the side wall of the adjusting rod (323), and the other end extends out of the operating slot (3214). A limiting member is slidably provided on the center rod (321), and the limiting member is used to control and change the fixed state of the operating pin (3231) in the operating slot (3214).

5. A drilling device for lithium ore exploration and sampling according to claim 4, characterized in that: The limiting member is a limiting slide bar (324), the sliding direction of the limiting slide bar (324) is parallel to the axis of the center rod (321), the height of the working portion (3212) is lower than the height of the soil landing portion (3213), when the movable sheet (3221) is located in the working portion (3212), the side wall of the limiting slide bar (324) abuts against the side wall of the operating pin (3231), and a limiting cylinder (325) is provided on the rod wall of the center rod (321) for the limiting slide bar (324) to be coaxially inserted.

6. A drilling device for lithium ore exploration and sampling according to claim 5, characterized in that: A thrust block (12) is fixedly connected to the fixing frame (1), and the thrust block (12) is used to abut against a side of the operating pin (3231) that is away from the limiting sliding rod (324).

7. A drilling device for lithium ore exploration and sampling according to claim 5 or 6, characterized in that: A retaining plate (4) is slidably arranged on the fixing frame (1); the plate surface of the retaining plate (4) is a vertical plane; the sliding direction is the radial direction of the sampling tube (31); a soil-moving gap (311) for inserting the retaining plate (4) is provided on the tube wall of the sampling tube (31); the height of the retaining plate (4) is less than the spiral lead of the spiral blade (322); a sealing elastic strip (312) is fixedly connected on the tube wall of the sampling tube (31) and inside the soil-moving gap (311); in a natural state, the sealing elastic strip (312) closes the soil-moving gap (311).

8. A drilling device for lithium ore exploration and sampling according to claim 7, characterized in that: A scraper strip (41) is slidably arranged below the retaining plate (4), and the sliding direction is a vertical direction. The scraper strip (41) is used to contact the upper surface of the spiral blade (322). A control component (42) for controlling the sliding of the scraper strip (41) is provided on the retaining plate (4).

9. A drilling device for lithium ore exploration and sampling according to claim 8, characterized in that: The control assembly (42) comprises a push slide (421), a force slide (423) and a return spring (425); the force slide (423) is fixedly connected to the scraper strip (41); the push slide (421) and the force slide (423) are both slidably connected to the retaining plate (4) and the plate surfaces are parallel to each other; the sliding direction of the push slide (421) is parallel to the sliding direction of the retaining plate (4); the sliding direction of the force slide (423) is vertical; the push slide (421) is provided with a thrust wedge surface (422); the force slide (423) is provided with a response spring (425); The wedge surface (424) is provided with a thrust wedge surface (422) and a response wedge surface (424) in abutment with each other. One end of the return spring (425) is connected to the retaining plate (4), and the other end is connected to the force-bearing slide plate (423). In a natural state, the scraper strip (41) is located inside the retaining plate (4). The edge of the push slide plate (421) extends from the retaining plate (4) toward one end of the center rod (321). An abutment ball (426) is embedded at one end of the push slide plate (421) close to the center rod (321). The abutment ball (426) is used to abut against the side wall of the center rod (321).

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