Large-diameter well drilling device under complex geological conditions

Abstract

The invention relates to the technical field of drilling, in particular to a complex geological condition large-diameter drilling device which comprises a platform and a drill rod vertically penetrating through the platform. A centrifugal ring, a centrifugal plate, a transmission unit and a temporary storage bin are arranged in the platform; the centrifugal ring sleeves the periphery of the drill rod along the axis of the drill rod; the centrifugal plates are fixedly arranged on the lower portion of the centrifugal ring in the radial direction of the centrifugal ring, and the multiple centrifugal plates are evenly distributed around the axis of the centrifugal ring. The multiple conveying units are of an annular structure and are sequentially arranged in a sleeving mode in the radial direction of the centrifugal ring, the bottoms of all the conveying units are higher than the lower portion of the centrifugal plate, and the smaller the outer diameter of each conveying unit is, the lower the height of the bottom of each conveying unit is; the temporary storage bin is of an annular structure and is arranged outside the transmission unit located on the outermost layer in a sleeving mode. Risks of drill hole collapse, hole shrinkage, drill rod operation hindering and the like caused by accumulation of soil and stones around the drill rod are effectively avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the field of drilling technology, in particular to a large-diameter drilling device under complex geological conditions. BACKGROUND

[0002] When drilling under complex geological conditions, the soil near the drilling hole needs to be cleaned in time, so that the working conditions of the drill bit and the drill pipe can be clearly observed, and the soil and gravel discharged through the drilling hole can also be prevented from forming a pile at the drilling hole, thereby causing the soil and gravel around the drilling hole to fall back into the drilling hole.

[0003] Chinese Patent No. CN118815365B discloses a drilling equipment, which comprises a base, a supporting rod installed on the lower surface of the base, an installation block installed on the base, a lifting groove formed in the installation block, a lifting rod and a screw rod installed in the lifting groove, the screw rod driving the lifting rod to move up and down, a horizontal plate installed at the upper end of the lifting rod, a lifting motor and a fixed plate installed on the horizontal plate, the lifting motor driving the screw rod to rotate, a drilling motor and a connecting head installed on the fixed plate, the drilling motor driving the connecting head to rotate, and a drill pipe installed at the lower end of the connecting head; a working window is formed in the base, and the lower end of the drill pipe passes through the working window; a pressing plate is installed below the base, the pressing plate is connected to the base through an extension rod, an electric push rod is installed in the installation block, the lower end of the electric push rod is connected to the pressing plate, a through hole is formed in the middle of the pressing plate, the drill pipe passes through the through hole, a contact plate is installed on the inner wall of the through hole, and the other end of the contact plate is in contact with the drill pipe; a connecting cylinder is installed below the pressing plate, and the connecting cylinder is inserted into the wellbore drilled by the drill pipe.

[0004] Although the above-mentioned scheme can push the soil and rock accumulated around the drill pipe away to a certain extent, the soil and rock cannot be reasonably guided and collected during the process of pushing the soil and rock away, and the soil and rock around the drill pipe will accumulate more and more as the drilling deepens, resulting in a circle of soil and rock accumulation around the drilling hole, which affects the observation of the state of the drill pipe by the workers and easily hinders the operation near the drill pipe. In addition, the pressing plate also hinders the normal discharge of the soil and rock, resulting in poor discharge of the soil and rock during the drilling process. SUMMARY

[0005] In view of the above problems, the complex geological condition large-diameter drilling device is provided, the centrifugal ring and the centrifugal plate are driven to rotate by starting the first rotary driver, the earth and stone discharged from the drilling are stirred and thrown into the transmission unit by the centrifugal force generated by the rotation of the centrifugal plate, and the earth and stone are classified and transmitted by the centrifugal force generated by the transmission unit which is sequentially sleeved in the radial direction and has a larger outer diameter and a higher bottom, so that the earth and stone are discharged into the temporary storage bin which is higher than the ground by a certain distance, and finally the earth and stone can be uniformly conveyed to the designated position by the belt conveyor placed at the lower part of the temporary storage bin, so that the earth and stone can be timely pushed away, classified and transmitted, temporarily stored and uniformly collected during the drilling operation under the complex geological condition.

[0006] To solve the problems in the prior art, the present application provides a complex geological condition large-diameter drilling device, which comprises a platform and a drill rod vertically penetrating the platform. The centrifugal ring, the centrifugal plate, the transmission unit and the temporary storage bin are arranged in the platform. The centrifugal ring is sleeved on the periphery of the drill rod along the axis of the drill rod. The centrifugal plate is fixedly arranged at the lower part of the centrifugal plate in the radial direction of the centrifugal ring, and a plurality of centrifugal plates are uniformly distributed around the axis of the centrifugal ring. The transmission unit has a ring structure and is provided with a plurality of transmission units, the transmission units are sequentially sleeved in the radial direction of the centrifugal ring, the bottoms of all the transmission units are higher than the lower part of the centrifugal plate, and the smaller the outer diameter of the transmission unit, the lower the height of the bottom of the transmission unit. The temporary storage bin has a ring structure and is sleeved outside the transmission unit in the outermost layer.

[0007] Preferably, the transmission unit comprises a transmission groove, the transmission groove is arranged on the periphery of the centrifugal ring, and the transmission groove has a concave ring structure.

[0008] Preferably, the transmission unit further comprises a rotating plate and a driving unit. The rotating plate is arranged in the transmission groove and rotates around the axis of the transmission groove. The driving unit is arranged on one side of the rotating plate and is used to drive the rotating plate to rotate.

[0009] Preferably, the rotating plate forms a ring-shaped sweeping area when rotating, and a ring-shaped baffle is vertically arranged on the inner side of the ring-shaped sweeping area.

[0010] Preferably, a scraper is arranged in the temporary storage bin and rotates around the axis of the temporary storage bin, and a discharge port for discharging the earth and stone is formed in the bottom of the temporary storage bin.

[0011] Preferably, the extension direction of the scraper and the radial direction of the temporary storage bin form an included angle.

[0012] Preferably, a maintenance bin for placing the driving unit is arranged in the platform, and a cover plate is arranged at the upper part of the maintenance bin.

[0013] Preferably, a wear-resistant sleeve is arranged at the lower part of the centrifugal plate.

[0014] Preferably, a belt conveyor is arranged below the discharge port.

[0015] Preferably, the belt conveyor comprises a conveying belt, and material grooves for conveying the earth and stones are uniformly arranged on the conveying belt.

[0016] The beneficial effects of the present application compared with the prior art are: 1. The centrifugal ring drives the centrifugal plate to rotate to generate centrifugal force to push away the earth and stones, combined with a plurality of transmission units arranged according to the rule of "the larger the outer diameter, the higher the bottom", which are used for hierarchical conveying, and then the temporary storage bin is used for centralized storage and the belt conveyor is used for unified transfer, so that the whole process of "timely pushing away-hierarchical transmission-centralized temporary storage-unified collection" is realized, which effectively avoids the risks of borehole collapse, reduced diameter and hindered operation of the drill rod caused by the accumulation of earth and stones around the drill rod, eliminates the problem of water flow aggregation caused by the annular earth and stone pile, and provides a clear operation field of view for the workers, thereby ensuring the safety and continuity of the drilling operation.

[0017] 2. By arranging a replaceable wear-resistant sleeve at the lower part of the centrifugal plate, installing a ring-shaped baffle on the inner ring side of the rotating plate, and designing the transmission groove as a concave structure, the direct wear between the centrifugal plate and the earth and stones is reduced, the earth and stones are prevented from impacting the rotating plate, and the earth and stones are prevented from falling back during the transmission process; the design of the material groove of the belt conveyor avoids the rolling and scattering of the earth and stones during the conveying process, thereby reducing the equipment wear and tear in multiple aspects and significantly improving the stability and service life of the device operation.

[0018] 3. By centrally arranging the first rotary driver, the second rotary driver and the third rotary driver in the maintenance bin with a cover plate, quick opening and maintenance are facilitated; the replaceable design of the centrifugal plate wear-resistant sleeve simplifies the maintenance process of the vulnerable parts; the design of the scraper in the temporary storage bin at an angle with the radial direction reduces the difficulty of controlling the overflow of the earth and stones during operation, and overall improves the maintenance convenience and operation practicality of the device. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of a large-diameter drilling device under complex geological conditions according to the present application Figure 1 .

[0020] Figure 2 is a perspective view of a large-diameter drilling device under complex geological conditions according to the present application Figure 2 .

[0021] Figure 3 is a side view of a large-diameter drilling device under complex geological conditions according to the present application.

[0022] Figure 4is a large-diameter drilling device under complicated geological conditions Figure 3 is a sectional view of the middle A-A.

[0023] Figure 5 is a large-diameter drilling device under complicated geological conditions Figure 4 is an enlarged view of the middle B.

[0024] Figure 6 is a sectional view of the large-diameter drilling device under complicated geological conditions.

[0025] Figure 7 is an enlarged view of the middle C. Figure 6

[0026] Figure 8 is an enlarged view of the middle D. Figure 6

[0027] Figure 9 is a three-dimensional view of the large-diameter drilling device under complicated geological conditions after removing the cover plate and part of the platform.

[0028] Figure 10 is a three-dimensional view of the large-diameter drilling device under complicated geological conditions after removing the belt conveyor, cover plate and part of the platform.

[0029] In the figure, the reference numerals are: 1, drill rod; 2, platform; 21, centrifugal ring; 211, first rotary driver; 212, first tooth ring; 213, first gear; 22, centrifugal plate; 221, wear-resistant sleeve; 23, conveying unit; 231, conveying groove; 232, rotating plate; 233, driving unit; 2331, second rotary driver; 2332, second gear; 2333, second tooth ring; 234, annular baffle; 24, temporary storage bin; 241, scraper; 242, discharge port; 243, third rotary driver; 244, third gear; 245, third tooth ring; 25, maintenance bin; 251, cover plate; 3, belt conveyor; 31, conveying belt; 32, material groove. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in conjunction with the drawings and specific embodiments.

[0031] Reference Figures 1-6 and Figure 8 : A large-diameter drilling device under complicated geological conditions, comprising a platform 2 and a drill rod 1 vertically penetrating the platform 2; ​​A centrifugal ring 21, a centrifugal plate 22, a conveying unit 23 and a temporary storage bin 24 are arranged in the platform 2. The centrifugal ring 21 is sleeved on the outer periphery of the drill rod 1 along the axis of the drill rod 1. The centrifugal plate 22 is fixedly arranged at the lower part of the centrifugal plate 22 along the radial direction of the centrifugal ring 21, and a plurality of centrifugal plates 22 are arranged uniformly around the axis of the centrifugal ring 21. The conveying unit 23 is annular in structure and is arranged in multiple, and the conveying units 23 are sequentially sleeved along the radial direction of the centrifugal ring 21, the bottom of all the conveying units 23 is higher than the lower part of the centrifugal plate 22, and the smaller the outer diameter of the conveying unit 23 is, the lower the height of the bottom of the conveying unit 23 is. The temporary storage bin 24 is annular in structure and is sleeved outside the outermost conveying unit 23.

[0032] In drilling operations, especially in the face of complex geological conditions, it is crucial to timely push away the soil and stones accumulated around the drill rod 1. This is not only to avoid the risk of excessive accumulation of soil and stones near the drilling hole, falling into the drilling hole due to gravity or construction vibration, causing the drilling hole to collapse, shrinkage, and other risks, affecting the smooth progress of drilling; at the same time, cleaning up the accumulated soil and stones can provide a clear operating field of view for the workers, facilitating real-time observation of the wear degree of the drill rod 1, the drilling angle and the working state of the drill bit, and once drill tool failure or drilling anomaly is found, timely stop processing can be performed to avoid more serious equipment damage or safety accidents caused by delayed disposal due to obstructed vision. In addition, pushing away the soil and stones around the drill rod 1 can also provide enough space for the normal operation of the drilling equipment, prevent the soil and stones from winding around the drill rod 1 and hindering the lifting of the drill rod 1, and ensure the continuity and efficiency of the drilling operation. In the prior art, although there are devices that can push away the soil and stones around the drill rod 1, they cannot reasonably collect the pushed away soil and stones. Although a large amount of soil and stones can be pushed away from the drill rod 1, a ring-shaped soil and stone pile will be formed around the drill rod 1, which makes it inconvenient for workers to approach the drill rod 1 for installation, and when drilling to a specified position, such as the presence of water sources in the well, water flow will also flow out of the drilling hole, and the ring-shaped soil and stone pile will cause the water flow to gather above the drilling hole, which cannot be discharged.

[0033] In order to avoid the above situation, the structure of the existing drilling device is optimized, so that the drilling device can not only push away the discharged soil and stones from the drill rod 1, but also reasonably collect the pushed away soil and stones when drilling. The specific structure and working process of the present application are as follows: The transmission unit 23 comprises a first rotary driver 211, a first tooth ring 212 and a first gear 213, the first tooth ring 212 is fixedly arranged on the upper portion of the centrifugal ring 21 along the axis of the centrifugal ring 21, the first gear 213 is rotatably arranged on one side of the first tooth ring 212, the first gear 213 and the first gear 213 are mutually engaged, the first rotary driver 211 is arranged at the end of the first gear 213 and is used to drive the first gear 213 to rotate, and the first rotary driver 211 is preferably a servo motor. A first slope is arranged on the inner ring side of the transmission unit 23 adjacent to the centrifugal plate 22, and the first slope facilitates the soil and stones to smoothly enter the transmission unit 23 under the action of the centrifugal force. In addition, an inclined second slope is arranged between the adjacent two transmission units 23, and the function of the second slope is the same as that of the first slope.

[0034] When the drilling device is working by using the drill pipe 1, the drill pipe 1 extends into the borehole, and as the drill pipe 1 descends, the soil and stones are continuously discharged from the borehole, at this time, the first rotary driver 211 and the transmission unit 23 are started at the same time, the centrifugal ring 21 is rapidly rotated under the driving of the first gear 213 and the first tooth ring 212, the centrifugal ring 21 drives the centrifugal plate 22 to rotate, when the soil and stones are discharged from the borehole, the rotating centrifugal plate 22 stirs the discharged soil and stones, the rotating centrifugal plate 22 produces a pushing action on the soil and stones, and as the rotating speed of the centrifugal ring 21 continuously increases, the centrifugal force generated by the centrifugal plate 22 when pushing the soil and stones also gradually increases, under the action of the continuously increasing centrifugal force, the soil and stones are thrown into the transmission unit 23, since the transmission unit 23 is arranged in multiple and is sequentially sleeved along the radial direction of the centrifugal ring 21, therefore, the outer diameters of different transmission units 23 are different, the transmission unit 23 can also generate a centrifugal force after being started, the transmission unit 23 transmits the soil and stones through the centrifugal force generated by itself, so that the soil and stones are discharged into the temporary storage bin 24 under the transmission of multiple transmission units 23, and finally are uniformly collected. In addition, since the soil and stones collected in the temporary storage bin 24 need to be uniformly collected, the height of the temporary storage bin 24 needs to be higher than the ground by a certain distance, so that the lower portion of the temporary storage bin 24 can be placed into a belt conveyor 3, and the soil and stones in the temporary storage bin 24 are conveyed to a designated position by using the belt conveyor 3. Therefore, in order to ensure the stability of the soil and stones when being pushed away from the drill pipe 1, the soil and stones need to be transported in stages, so that the soil and stones will not fall back when being pushed. Therefore, the smaller the outer diameter of the transmission unit 23 is, the lower the bottom height is, and vice versa, the larger the outer diameter of the transmission unit 23 is, the higher the bottom height is, so that the soil and stones can be transported in stages when being transported, and the soil and stones can be smoothly pushed into the temporary storage bin 24 for storage. In addition, it is worth noting that there is still a certain distance between the bottom of the centrifugal plate 22 and the ground, and such arrangement can ensure that the centrifugal plate 22 will not directly rub against the ground when rotating, and the soil and stones discharged through the borehole are all in loose state, and the wear of the centrifugal plate 22 is low.

[0035] The centrifugal ring 21 and the centrifugal plate 22 are driven to rotate by starting the first rotary driver 211, the soil and stones discharged from the drilling hole are stirred and thrown into the transmission unit 23 by the centrifugal force generated by the rotation of the centrifugal plate 22, and the soil and stones are classified and transmitted by the centrifugal force generated by the transmission unit 23 which is sequentially sleeved in the radial direction and has a larger outer diameter and a higher bottom height, so that the soil and stones are discharged into the temporary storage bin 24 which is higher than the ground by the transmission unit 23, and finally the soil and stones can be uniformly conveyed to the designated position by the belt conveyor 3 placed at the lower part of the temporary storage bin 24, which realizes the timely pushing away, classified transmission, centralized temporary storage and unified collection of the soil and stones in the drilling operation under complex geological conditions, effectively avoids the problems of drilling hole collapse, diameter reduction, hindering the operation of the drill pipe 1, affecting the operation field of view and water flow aggregation caused by the accumulation of soil and stones around the drill pipe 1, and the distance between the bottom of the centrifugal plate 22 and the ground can avoid the friction between the centrifugal plate 22 and the ground, and the loose soil and stones have low wear on the centrifugal plate 22, which ensures the stability and continuity of the device operation.

[0036] With reference to Figure 5 The transmission unit 23 comprises a transmission groove 231, and the transmission groove 231 is arranged on the periphery of the centrifugal ring 21 and has a concave annular structure.

[0037] The bottom of the transmission unit 23 refers to the bottom of the transmission groove 231, and the centrifugal force generated by the synchronous rotation of the centrifugal plate 22 and the centrifugal ring 21 pushes the soil and stones into the transmission unit 23 adjacent to the centrifugal plate 22, and since the transmission groove 231 has a concave annular structure, when the soil and stones at a lower position are pushed into the transmission groove 231, the transmission groove 231 can temporarily store the entering soil and stones, avoiding the phenomenon of falling back of the pushed-in soil and stones.

[0038] With reference to Figure 6 and Figure 7 The transmission unit 23 further comprises a rotating plate 232 and a driving unit 233. The rotating plate 232 is arranged in the transmission groove 231 and rotates around the axis of the transmission groove 231. The driving unit 233 is arranged on one side of the rotating plate 232 and is used to drive the rotating plate 232 to rotate.

[0039] The driving unit 233 drives the rotating plate 232 to rotate in the transmission groove 231, so that the earth and stone temporarily stored in the transmission groove 231 is discharged under the action of centrifugal force into the next stage transmission unit 23, and then falls into the temporary storage bin 24, and the earth and stone is stored by the temporary storage bin 24. The driving unit 233 comprises a second rotary driver 2331, a second gear 2332 and a second gear ring 2333, the second rotary driver 2331 is arranged above the rotating plate 232, the second gear 2332 is fixedly arranged on the output end of the second rotary driver 2331, and the second gear ring 2333 is fixedly arranged on the upper portion of the rotating plate 232 along the axis of the centrifugal ring 21. The second rotary driver 2331 is preferably a servo motor, when the second rotary driver 2331 is started, the second rotary driver 2331 drives the second gear ring 2333 to rotate through the second gear 2332, so that the rotating plate 232 rotates smoothly.

[0040] With reference to Figure 5 And Figure 7 : When the rotating plate 232 rotates, an annular sweeping area is formed, and an annular baffle 234 is vertically arranged on the inner ring side of the annular sweeping area.

[0041] Since the movement of the earth and stone needs to be affected by the centrifugal force, the just pushed out earth and stone has a certain inertia. Taking the transmission unit 23 adjacent to the centrifugal plate 22 as an example, when the centrifugal plate 22 rotates, the earth and stone is thrown out under the thrust of the centrifugal plate 22, at this time, the rotating plate 232 in the transmission unit 23 is also in a rotating state, and the thrown out earth and stone invades the path of the rotating rotating plate 232, causing the rotating rotating plate 232 to be greatly worn. In order to avoid the above situation, the annular baffle 234 is installed, which blocks the just thrown out earth and stone, avoiding the direct impact of the thrown out earth and stone on the rotating plate 232, and reducing the wear of the rotating plate 232 when rotating.

[0042] With reference to Figure 5 And Figure 6 : A scraper 241 is arranged to rotate around the axis of the temporary storage bin 24 in the temporary storage bin 24, and a discharge port 242 for discharging the earth and stone is arranged at the bottom of the temporary storage bin 24.

[0043] After the soil and stones enter the temporary storage bin 24, the scraper 241 rotates, and the scraper 241 pushes the soil and stones accumulated in the temporary storage bin 24 to the discharge port 242 to be discharged, so that the soil and stones accumulated in a ring shape are pushed to the discharge port 242 by the scraper 241 and are uniformly discharged. A third gear ring 245 is fixedly arranged at the upper portion of the scraper 241 along the axis of the temporary storage bin 24, a third gear wheel 244 is rotatably arranged on one side of the third gear ring 245, the third gear wheel 244 is in mesh with the third gear ring 245, a third rotary driver 243 is arranged at the upper portion of the third gear wheel 244, and the third rotary driver 243 is used to drive the third gear wheel 244 to rotate. The third rotary driver 243 is preferably a servo motor.

[0044] With reference to Figure 10 : The extending direction of the scraper 241 and the radial direction of the temporary storage bin 24 form an angle.

[0045] By making the extending direction of the scraper 241 and the radial direction of the temporary storage bin 24 form an angle, it is ensured that the front end of the scraper 241 can provide more soil and stones for accumulation when the scraper 241 pushes the soil and stones in the temporary storage bin 24 to move, thereby avoiding the situation that the soil and stones fall from the temporary storage bin 24 into the transmission unit 23 when the scraper 241 pushes the soil and stones to move.

[0046] With reference to Figure 6 and Figure 9 : The maintenance bin 25 for placing the driving unit 233 is arranged in the platform 2, and the upper portion of the maintenance bin 25 is provided with a cover plate 251.

[0047] The first rotary driver 211, the second rotary driver 2331 and the third rotary driver 243 are all located in the maintenance bin 25, and when the first rotary driver 211, the second rotary driver 2331 and the third rotary driver 243 fail, the upper cover plate 251 of the maintenance bin 25 can be removed to directly perform maintenance work.

[0048] With reference to Figure 10 : The wear-resistant sleeve 221 is arranged at the lower portion of the centrifugal plate 22.

[0049] Since the soil and stones are in contact with the lower side of the centrifugal plate 22 when the centrifugal plate 22 rotates, in order to facilitate subsequent maintenance, the replaceable wear-resistant sleeve 221 is arranged at the lower portion of the centrifugal plate 22, and when the wear-resistant sleeve 221 is worn, the wear-resistant sleeve 221 can be replaced.

[0050] With reference to Figure 6 : The belt conveyor 3 is arranged below the discharge port 242.

[0051] After the soil and stones are discharged from the discharge port 242 and fall on the belt conveyor 3, the belt conveyor 3 uniformly conveys the soil and stones to a designated position, which is convenient for subsequent collection and transportation.

[0052] Reference Figure 9 : The belt conveyor 3 comprises a conveying belt 31, on which material grooves 32 for conveying earth and stones are evenly arranged.

[0053] By arranging the material grooves 32 on the conveying belt 31, the random rolling of the earth and stones falling on the conveying belt 31 is avoided.

[0054] Working principle: During operation, the drill rod 1 drills downward and continuously discharges earth and stones, at this time, the first rotary driver 211 is started, and the centrifugal ring 21 sleeved on the outer periphery of the drill rod 1 is driven to rotate at high speed through the meshing of the first gear 213 and the first tooth ring 212, and the plurality of centrifugal plates 22 evenly arranged at the lower part of the centrifugal ring 21 rotate, and the earth and stones accumulated at the drilling hole are pushed away by using the centrifugal force. The bottom of the centrifugal plate 22 is spaced from the ground to avoid friction, and the lower part is also provided with a replaceable wear-resistant sleeve 221 to reduce wear and ensure long-term stable operation.

[0055] The earth and stones pushed away are slid into a plurality of transmission units 23 arranged along the radial direction in sequence under the action of the centrifugal force through the first slope and the second slope. These transmission units 23 are arranged in stages according to the rule that "the larger the outer diameter, the higher the bottom of the transmission groove 231". Each unit contains a recessed transmission groove 231, a rotating plate 232 and a driving unit 233. The second rotary driver 2331 in the driving unit 233 drives the rotating plate 232 to rotate to generate centrifugal force, which pushes the earth and stones temporarily stored in the transmission groove 231 to the outer transmission unit 23 in stages, and finally to the outermost transmission unit 23; the annular baffle 234 on the inner ring side of the sweeping area of the rotating plate 232 can block the inertia of the earth and stones from hitting the rotating plate 232, thereby reducing wear.

[0056] The outermost transmission unit 23 discharges the earth and stones into the annular temporary storage bin 24, and the bottom of the temporary storage bin 24 is higher than the ground to reserve space for the belt conveyor 3. The third rotary driver 243 drives the scraper 241 in the bin to rotate through the third gear 244 and the third tooth ring 245, and the scraper 241 is radially at an angle with the temporary storage bin 24, which can not only push the earth and stones to move towards the discharge port 242 at the bottom, but also prevent the earth and stones from piling up and overflowing from the upper part of the temporary storage bin 24 when being pushed. The earth and stones falling from the discharge port 242 are received by the belt conveyor 3 below, and the material grooves 32 on the conveying belt 31 of the conveyor can avoid the rolling of the earth and stones, and finally stably convey the earth and stones to the designated position for collection. In addition, the first rotary driver 211, the second rotary driver 2331 and the third rotary driver 243 of the device are all arranged in the maintenance bin 25 of the platform 2, and the cover plate 251 can be opened for convenient maintenance, which further ensures the continuity of the earth removal process.

[0057] The above embodiments only express one or several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the protection scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A large-diameter drilling device for complex geological conditions, comprising a platform (2) and a drill pipe (1) vertically penetrating through the platform (2); characterized in that a centrifugal ring (21), a centrifugal plate (22), a transmission unit (23) and a temporary storage bin (24) are arranged in the platform (2); the centrifugal ring (21) is sleeved on the outer periphery of the drill pipe (1) along the axis of the drill pipe (1); the centrifugal plate (22) is fixedly arranged at the lower part of the centrifugal plate (22) along the radial direction of the centrifugal ring (21), and a plurality of centrifugal plates (22) are arranged, which are uniformly arranged around the axis of the centrifugal ring (21); the transmission unit (23) is annular and has a plurality of transmission units (23), which are sequentially sleeved along the radial direction of the centrifugal ring (21), the bottoms of all the transmission units (23) are higher than the lower part of the centrifugal plate (22), and the smaller the outer diameter of the transmission unit (23) is, the lower the height of the bottom of the transmission unit (23) is; the temporary storage bin (24) is annular and is sleeved outside the outermost transmission unit (23).

2. The large-diameter drilling device for complex geological conditions according to claim 1, characterized in that, The transmission unit (23) comprises a transmission groove (231), which is arranged on the outer periphery of the centrifugal ring (21) and has a concave annular structure.

3. The large-diameter drilling device for complex geological conditions according to claim 2, characterized in that, The transmission unit (23) further comprises a rotating plate (232) and a driving unit (233); the rotating plate (232) is rotatably arranged in the transmission groove (231) around the axis of the transmission groove (231); the driving unit (233) is arranged on one side of the rotating plate (232) and is used for driving the rotating plate (232) to rotate.

4. The large-diameter drilling device for complex geological conditions according to claim 3, characterized in that, The rotating plate (232) forms an annular sweeping area when rotating, and an annular baffle (234) is vertically arranged on the inner side of the annular sweeping area.

5. The apparatus according to claim 1, wherein, A scraper (241) is rotatably arranged around the axis of the temporary storage bin (24) in the temporary storage bin (24), and a discharge port (242) for discharging soil and rocks is formed in the bottom of the temporary storage bin (24).

6. The apparatus according to claim 5, wherein, The extension direction of the scraper (241) and the radial direction of the temporary storage bin (24) form an included angle.

7. The large-diameter drilling device for complex geological conditions according to claim 3, characterized in that, An inspection bin (25) for placing the driving unit (233) is arranged in the platform (2), and a cover plate (251) is arranged on the upper part of the inspection bin (25).

8. The apparatus according to claim 1, wherein, A wear-resistant sleeve (221) is arranged at the lower part of the centrifugal plate (22).

9. The apparatus according to claim 5, wherein, A belt conveyor (3) is arranged below the discharge port (242).

10. The apparatus according to claim 9, wherein, The belt conveyor (3) comprises a conveying belt (31), and material grooves (32) for conveying soil and rocks are uniformly arranged on the conveying belt (31).

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