A construction-improved and transportation-convenient rotary drilling rig

Abstract

The present invention discloses a rotary drilling rig with construction improvement and convenient transportation, which is applied to the technical field of rotary drilling rigs. It includes a chassis, a turntable, a hoisting mechanism, an amplitude-changing mechanism, a driving mechanism, a drill bit, and a cleaning mechanism. The turntable is arranged on the top of the chassis and is rotatably connected to the chassis. The hoisting mechanism and the amplitude-changing mechanism are arranged on the turntable. The drill bit and the cleaning mechanism are arranged at the output end of the driving mechanism. The cleaning mechanism is arranged above the drill bit. The cleaning mechanism includes a protective cylinder, a rotating cylinder, a cleaning part, and a plurality of pressure sensors. The cleaning part includes a connecting block, a slider, and a spring. The connecting block includes a connecting center and a plurality of connecting arms. The outer wall of the connecting arm in the radial direction matches the inner diameter of the drill bit body. A second chute is opened at the bottom of the periphery of the connecting arm. In the present invention, the clay adhered to the inside of the drill bit cylinder of the rotary drilling rig can be cleaned, improving the construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary drilling rigs, and particularly to a rotary drilling rig with improved construction and convenient transportation. Background Technique

[0002] Due to the advantages of fast construction speed, flexibility, and high civilization degree at the construction site, rotary drilling rigs are often the preferred equipment in the hole-forming process of pile foundation construction. And the rotary drilling rig can obtain the best hole-forming efficiency by configuring different forms of drill bits. Among them, when the rotary drilling rig drills in cohesive soil layers, the barrel drill is often the preferred drill bit form.

[0003] However, due to the rich clay minerals in cohesive soil, after the rotary drilling rig drills a hole, clay will adhere to the inside of the rotary drill bucket it is equipped with, and then it is difficult for the sticky soil blocks in the barrel to automatically fall to the ground under the action of gravity. The clay blocks remaining in the barrel and unable to fall automatically occupy the space in the barrel, which will reduce the volume of clay that the barrel can accommodate during the next drilling, thus reducing the hole-forming efficiency.

[0004] The existing cleaning methods usually adopt manual cleaning or use the rotary drilling rig itself for cleaning. However, during manual cleaning, the labor intensity is high, manpower is wasted, and there are safety hazards when people operate under the barrel drill; when the rotary drilling rig itself is used for cleaning, if the drill pipe is suddenly stopped and rotated, and the clay blocks are thrown out by inertia and centrifugal force, the cleaning is often not thorough, and manual assistance is still required. Moreover, the acceleration of sudden stop and rotation will bring a large instantaneous force, causing certain damage to the structure of the drill pipe itself, reducing its service life, and throwing the sticky soil blocks out of the barrel may hit the surrounding construction workers, posing a safety hazard; if the winch is quickly lifted and lowered to make the barrel shake up and down quickly to shake out the clay blocks from the barrel, the cleaning is still not thorough, manual assistance is required, and it may cause damage to the structure of the rotary drilling rig itself.

[0005] Therefore, it is necessary to provide a rotary drilling rig with improved construction and convenient transportation to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a rotary drilling rig with improved construction and convenient transportation, which can clean the clay adhered to the inside of the drill bit barrel of the rotary drilling rig and improve the construction efficiency, so as to solve the problems raised in the above background technique.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a rotary drilling rig with improved construction and convenient transportation, including a chassis, a turntable, a hoisting mechanism, a luffing mechanism, a driving mechanism, a drill bit, and a cleaning mechanism. The turntable is arranged on the top of the chassis and is rotatably connected to the chassis. The hoisting mechanism and the luffing mechanism are arranged on the turntable. The drill bit and the cleaning mechanism are arranged at the output end of the driving mechanism. The cleaning mechanism is arranged above the drill bit;

[0008] The cleaning mechanism includes a protective cylinder, a rotating cylinder, a cleaning part, and a plurality of pressure sensors;

[0009] The cleaning part includes a connecting block, a sliding block, and a spring. The connecting block includes a connecting center and a plurality of connecting arms. The outer wall of the radial direction of the connecting arm matches the inner diameter of the drill bit. A second chute is opened at the bottom of the periphery of the connecting arm;

[0010] The pressure sensors are arranged in the second chute. The pressure sensors are fixedly connected to the connecting arms. The pressure sensors are electrically connected to a pressure analysis module. The pressure analysis module is signal-connected to a control end. The control end is also signal-connected to the hoisting mechanism, the luffing mechanism, the driving mechanism, and the cleaning mechanism.

[0011] According to the above technical solutions, an operation room and a support block are arranged on the turntable. The operation room is fixed on one side of the turntable near the drill bit at the top. The support block is fixed on the top of the turntable on the side far from the drill bit.

[0012] According to the above technical solutions, the hoisting mechanism includes a hoist, a plurality of pulleys, and a swivel. The hoist is arranged at the center of the top of the turntable. The hoist is connected with a hoisting rope. The end of the hoisting rope far from the hoist is connected to the swivel.

[0013] According to the above technical solutions, the luffing mechanism includes two groups of hydraulic cylinders I, a hydraulic cylinder II, two groups of boom arms, a tripod, and a mast. The mast includes three apex angles. Both the hydraulic cylinder I and the hydraulic cylinder II include an output end and a fixed end;

[0014] The fixed ends of the two groups of hydraulic cylinders I and the two groups of boom arms are all hinged to the top of the turntable on the side close to the drill bit. The two groups of hydraulic cylinders I are horizontally arranged. The two groups of boom arms are respectively located on the upper and lower sides of the two groups of hydraulic cylinders I. One group of boom arms located below the hydraulic cylinder I is hinged to an apex angle of the tripod. The apex angle of the tripod close to the drill bit is hinged to the mast. The apex angle of the tripod far from the drill bit is hinged to the boom arm located above the hydraulic cylinder I, the output end of the hydraulic cylinder I, and the fixed end of the hydraulic cylinder II. The output end of the hydraulic cylinder II is hinged to the mast. The hinge point of the hydraulic cylinder II and the mast is located above the hinge point of the tripod and the mast;

[0015] The bottom of the mast is slidably connected with a support leg. A plurality of the pulleys are connected to the mast by bearings.

[0016] According to the above technical solution, the driving mechanism includes a drill pipe, a power head and a hydraulic cylinder III. The power head is arranged on one side of the mast away from the turntable. The hoisting device is arranged at the top of the drill pipe. The power head is connected to the drill pipe through a spline. A chute I is arranged on one side of the mast close to the power head. The hydraulic cylinder III includes an output end and a fixed end. The hydraulic cylinder III is arranged in the chute I. The fixed end of the hydraulic cylinder III is fixedly connected to the mast. The output end of the hydraulic cylinder III is fixedly connected to the power head. The power head is slidably connected to the mast;

[0017] The drill bit is fixed to the bottom of the drill pipe.

[0018] According to the above technical solution, the protective cylinder is fixed to the top of the drill bit. The rotating cylinder is arranged inside the protective cylinder and is rotatably connected to the protective cylinder. The cleaning part is arranged inside the drill bit. The pressure sensor is arranged inside the drill bit;

[0019] A half gear is fixedly connected to the side wall of the rotating cylinder. A motor I is fixedly connected to the bottom inside the protective cylinder. The output end of the motor I is fixedly connected to a gear. The gear meshes with the half gear.

[0020] According to the above technical solution, a moving plate group and a motor II are arranged inside the rotating cylinder. A plurality of abutting blocks are fixedly connected to the top inside the rotating cylinder. A plurality of guide columns I are fixedly connected inside the rotating cylinder. The moving plate group includes two groups of sliding plates and a plurality of sliding sleeves. The sliding sleeves are fixed between the two groups of sliding plates. The sliding sleeves are slidably sleeved around the outer periphery of the guide columns I;

[0021] The motor II is fixed to the top of the sliding plate above the sliding sleeve. The moving plate group is connected to a plurality of lead screws through bearings. The motor II is fixedly connected to one of the lead screws. A transmission part is arranged between the two groups of sliding plates. The transmission part is connected to the plurality of lead screws.

[0022] According to the above technical solution, the lead screw is threadedly connected to the bottom of the rotating cylinder. The connecting arm is fixedly connected to the connecting center. The connecting arm is T-shaped. The lead screw is connected to the connecting arm through a bearing. The slider is arranged in the chute II and is slidably connected to the connecting arm. A plurality of springs are fixed to the top of the slider. The other end of the spring is fixedly connected to the connecting arm.

[0023] According to the above technical solution, a plurality of guide columns II are fixedly connected to the bottom of the sliding plate below the sliding sleeve. The guide columns II are arranged inside the plurality of lead screws. The other end of the guide columns II is fixedly connected to the connecting arm. The guide columns II are slidably connected to the bottom of the rotating cylinder;

[0024] A plurality of arc-shaped grooves I and arc-shaped grooves II are arranged at the top of the protective cylinder.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the present invention, by providing a cleaning mechanism, it is possible to monitor the amount of soil inside the drill bit in real time. Combining with the dynamic adjustment of the cleaning part, the uniformization of the soil unloading resistance can be realized. It can also judge the difficulty of soil unloading according to the acquired pressure data when assisting the drill bit to unload soil. When the soil unloading difficulty is large, by evenly distributing the soil inside the drill bit during the next drilling, the adhesion problem inside the drill bit can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0027] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is a schematic diagram of the vertical state of the overall structure of the present invention;

[0029] Figure 3 is a schematic diagram of a partial structure of the present invention;

[0030] Figure 4 is a schematic sectional view of a partial structure of the present invention;

[0031] Figure 5 is a schematic diagram of a partial structure of the cleaning mechanism of the present invention;

[0032] Figure 6 is a schematic top view of a partial structure of the cleaning mechanism of the present invention;

[0033] Figure 7 is a schematic sectional view of a partial structure of the present invention;

[0034] Figure 8 is of the present invention Figure 7 schematic enlarged view of the structure of area A therein;

[0035] In the figure: 1, chassis; 2, turntable; 21, operation room; 22, support block; 3, hoisting mechanism; 31, hoist; 32, pulley; 33, hoisting rope; 34, swivel; 4, luffing mechanism; 41, hydraulic cylinder I; 42, hydraulic cylinder II; 43, boom; 44, tripod; 45, mast; 46, support leg; 5, drive mechanism; 51, drill pipe; 52, power head; 53, hydraulic cylinder III; 6, drill bit.

[0036] 7. Cleaning mechanism; 71. Protective cylinder; 72. Rotating cylinder; 73. Half gear; 74. Motor 1; 75. Block; 76. Guide post 1; 77. Moving plate group; 771. Slide plate; 772. Slide sleeve; 78. Motor 2; 79. Lead screw; 710. Transmission part; 711. Guide post 2; 712. Connecting block; 7121. Connection center; 7122. Connection arm; 713. Slide block; 714. Spring; 715. First arc-shaped groove; 716. Second arc-shaped groove; 717. Pressure sensor. Detailed implementation manner

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to Figures 1-8 , the present invention provides a technical solution: a rotary drilling rig with construction improvement and convenient transportation, including a chassis 1, a turntable 2, a hoisting mechanism 3, a luffing mechanism 4, a driving mechanism 5, a drill bit 6, and a cleaning mechanism 7. The turntable 2 is arranged on the top of the chassis 1 and is rotatably connected to the chassis 1. The hoisting mechanism 3 and the luffing mechanism 4 are arranged on the turntable 2. Both the hoisting mechanism 3 and the luffing mechanism 4 are used to connect the turntable 2 and the driving mechanism 5. The hoisting mechanism 3 is used to drive the driving mechanism 5 to lift and lower, and the luffing mechanism 4 is used to drive the driving mechanism 5 to rise and fall. The drill bit 6 and the cleaning mechanism 7 are arranged at the output end of the driving mechanism 5. The cleaning mechanism 7 is arranged above the drill bit 6. The driving mechanism 5 is used to provide a power source for the drill bit 6, and the cleaning mechanism 7 is used to clean the inside of the drill bit 6.

[0039] It should be noted that the chassis 1 is a crawler type, which is used to support the weight of the whole machine and provide the moving ability.

[0040] Specifically, as Figure 1 and Figure 2 shown, an operation room 21 and a support block 22 are arranged on the turntable 2. The operation room 21 is fixed on one side of the turntable 2 near the drill bit 6 at the top, and the support block 22 is fixed on the top of the turntable 2 on the side far from the drill bit 6. The operation room 21 is convenient for the staff to operate the rotary drilling rig to drill holes, and the support block 22 is used to support the driving mechanism 5 in a horizontal state.

[0041] Specifically, as Figure 2As shown in the figure, the hoisting mechanism 3 includes a hoist 31, several pulleys 32 and a swivel 34. The hoist 31 is arranged at the top center of the turntable 2. The hoist 31 is connected with a hoisting rope 33. The end of the hoisting rope 33 far from the hoist 31 is connected with the swivel 34. The hoist 31 is used to drive the hoisting and releasing of the hoisting rope 33, and the pulleys 32 are used to limit the position of the hoisting rope 33.

[0042] Specifically, as Figure 2 shown in the figure, the luffing mechanism 4 includes two groups of hydraulic cylinders I 41, hydraulic cylinders II 42, two groups of jibs 43, a tripod 44 and a mast 45. The mast 45 includes three apex angles. Both the hydraulic cylinders I 41 and the hydraulic cylinders II 42 include an output end and a fixed end;

[0043] The fixed ends of the two groups of hydraulic cylinders I 41 and the two groups of jibs 43 are all hinged to the top of the turntable 2 near the drill bit 6. The two groups of hydraulic cylinders I 41 are arranged horizontally. The two groups of jibs 43 are respectively located on the upper and lower sides of the two groups of hydraulic cylinders I 41. One group of jibs 43 located below the hydraulic cylinder I 41 is hinged to one apex angle of the tripod 44. The apex angle of the tripod 44 near the drill bit 6 is hinged to the mast 45. The apex angle of the tripod 44 far from the drill bit 6 is hinged to the jib 43 located above the hydraulic cylinder I 41, the output end of the hydraulic cylinder I 41 and the fixed end of the hydraulic cylinder II 42. The output end of the hydraulic cylinder II 42 is hinged to the mast 45. The hinged position of the hydraulic cylinder II 42 and the mast 45 is above the hinged position of the tripod 44 and the mast 45;

[0044] The bottom of the mast 45 is slidably connected with a support leg 46. The support leg 46 is used to further provide support for the mast 45 when the mast 45 is in a vertical state, increase the stability and prevent the mast 45 from tilting;

[0045] Several pulleys 32 are connected to the mast 45 by bearings.

[0046] In actual operation, when the hydraulic cylinder I 41 extends, it can drive the two groups of jibs 43 to rotate counterclockwise around the hinge with the turntable 2, and then drive the mast 45 to rotate counterclockwise around the hinge with the tripod 44 through the tripod 44 hinged to the jib 43, so that the mast 45 is in a propped state; when the hydraulic cylinder II 42 extends, it can further drive the mast 45 to rotate counterclockwise around the hinge with the tripod 44 to ensure that the mast 45 is fully propped up. At the same time, the tripod 44, the hydraulic cylinder II 42 and the mast 45 can form a triangular support, thus ensuring the stability of the mast 45 when it is propped up.

[0047] Specifically, as Figure 2As shown in the figure, the driving mechanism 5 includes a drill pipe 51, a power head 52, and a third hydraulic cylinder 53. The power head 52 is arranged on the side of the mast 45 away from the turntable 2. The elevating device 34 is arranged at the top of the drill pipe 51. The power head 52 is connected to the drill pipe 51 by a spline. A first chute is arranged on the side of the mast 45 close to the power head 52. The third hydraulic cylinder 53 includes an output end and a fixed end. The third hydraulic cylinder 53 is arranged in the first chute. The fixed end of the third hydraulic cylinder 53 is fixedly connected to the mast 45. The output end of the third hydraulic cylinder 53 is fixedly connected to the power head 52. The power head 52 is slidably connected to the mast 45;

[0048] The drill bit 6 is fixed to the bottom of the drill pipe 51. The drill bit 6 is a barrel drill. A lid is arranged at the bottom of the drill bit 6. Through holes are arranged at the top of the drill bit 6 and the lid. The through hole on the lid facilitates the soil generated by drilling to enter the drill bit 6. The hole at the top of the drill bit 6 facilitates the mud to gush out from the inside of the drill bit 6 when using mud to protect the wall during drilling.

[0049] In actual operation, the power head 52 is used to provide driving power for the drill pipe 51 to drive the drill pipe 51 to rotate. The winch 31 drives the retraction and release of the winch rope 33. Through the limitation of a number of pulleys 32, the drill pipe 51 is controlled to lift and lower smoothly, so as to adjust the depth when the drill bit 6 drills.

[0050] Specifically, as Figures 3-8 shown, the cleaning mechanism 7 includes a protective cylinder 71, a rotating cylinder 72, a cleaning part, and a number of pressure sensors 717. The protective cylinder 71 is fixed to the top of the drill bit 6. The rotating cylinder 72 is arranged inside the protective cylinder 71 and is rotatably connected to the protective cylinder 71. The cleaning part is arranged inside the drill bit 6. The pressure sensors 717 are arranged inside the drill bit 6. The cleaning part is used to assist the drill bit 6 in unloading soil and clean the inside of the drill bit 6.

[0051] Furthermore, as Figure 4 shown, a half gear 73 is fixedly connected to the side wall of the rotating cylinder 72. A first motor 74 is fixedly connected to the bottom inside the protective cylinder 71. The output end of the first motor 74 is fixedly connected to a gear. The gear meshes with the half gear 73. When the first motor 74 starts to rotate forward, it drives the gear to rotate forward. Through the meshing of the gear and the half gear 73, the rotating cylinder 72 can be driven to rotate in reverse. At the same time, when the first motor 74 starts to rotate in reverse, the rotating cylinder 72 can be driven to rotate forward.

[0052] Furthermore, as Figure 5 shown, a moving plate group 77 and a second motor 78 are arranged inside the rotating cylinder 72. A number of abutting blocks 75 are fixedly connected to the top inside the rotating cylinder 72. A number of first guide columns 76 are fixedly connected inside the rotating cylinder 72. The moving plate group 77 includes two groups of sliding plates 771 and a number of sliding sleeves 772. The sliding sleeves 772 are fixed between the two groups of sliding plates 771. The sliding sleeves 772 are slidably sleeved on the periphery of the first guide columns 76, so that the moving plate group 77 is slidably connected to the first guide columns 76;

[0053] The second motor 78 is fixed to the top of the slide plate 771 above the sliding sleeve 772. The moving plate group 77 is connected by bearings to a number of lead screws 79. The number of lead screws 79 and a number of first guide posts 76 are arranged staggeredly in the circumferential direction. The second motor 78 is fixedly connected to one group of lead screws 79. A transmission part 710 is arranged between the two groups of slide plates 771. The transmission part 710 is connected to the number of lead screws 79, so that after the second motor 78 is started, it drives the lead screw 79 fixedly connected to it to rotate, and then drives the rest of the lead screws 79 to rotate synchronously through the transmission of the transmission part 710. The transmission part 710 adopts chain wheel transmission.

[0054] Further, as Figure 2 、 Figure 5 、 Figure 7 and Figure 8 shown, the lead screw 79 is threadedly connected to the bottom of the rotating cylinder 72. The bottom of the lead screw 79 is connected to the cleaning part. The cleaning part includes a connecting block 712, a slider 713 and a spring 714. The connecting block 712 includes a connecting center 7121 and a number of connecting arms 7122. The connecting arms 7122 are fixedly connected to the connecting center 7121. The connecting arms 7122 are T-shaped. The lead screw 79 is connected to the connecting arms 7122 by bearings. The outer diameter of the radial wall of the connecting arms 7122 matches the inner diameter of the drill bit 6. A second chute is provided at the bottom of the periphery of the connecting arms 7122. The slider 713 is arranged in the second chute and is slidably connected to the connecting arms 7122. A number of springs 714 are fixedly connected to the top of the slider 713. The other end of the spring 714 is fixedly connected to the connecting arms 7122;

[0055] The pressure sensor 717 is arranged in the second chute, at the symmetry axis of the second chute. The pressure sensor 717 is fixedly connected to the connecting arms 7122. The pressure sensor 717 is electrically connected to a pressure analysis module. The pressure analysis module is signal-connected to a control end. The control end is arranged inside the operation room 21. The pressure analysis module is used to obtain the pressure data collected by the pressure sensor 717, and judge the amount of soil inside the drill bit 6 during drilling and the cleaning situation during soil unloading according to the obtained pressure data. The control end is also signal-connected to the hoisting mechanism 3, the luffing mechanism 4, the driving mechanism 5 and the cleaning mechanism 7. The control end is used to control soil drilling and display the data and judgment results obtained by the pressure analysis module.

[0056] Further, as Figure 5 and Figure 6 shown, a number of second guide posts 711 are fixedly connected to the bottom of the slide plate 771 below the sliding sleeve 772. The second guide posts 711 are arranged inside the number of lead screws 79. The other end of the second guide posts 711 is fixedly connected to the connecting arms 7122. The second guide posts 711 are slidably connected to the bottom of the rotating cylinder 72. The rotating cylinder 72 is used to distribute the force when the lead screw 79 drives the connecting arms 7122 to rotate synchronously when the rotating cylinder 72 rotates;

[0057] At the top of the protective cylinder 71, there are several first arc-shaped grooves 715 and second arc-shaped grooves 716. The first arc-shaped grooves 715 are used to limit the position of the second guide post 711 during rotation, and the second arc-shaped grooves 716 are used to limit the position of the lead screw 79 during rotation.

[0058] It should be noted that the number of the second motor 78, the first guide post 76, the second guide post 711, the connecting block 712, and the pressure sensor 717 is the same, and all are set to four groups in the drawings.

[0059] In actual operation, when the second motor 78 starts to rotate forward, it drives several lead screws 79 to rotate forward synchronously. Since the lead screw 79 is threadedly connected to the rotating cylinder 72, the rotating cylinder 72 moves upward on the lead screw 79. However, since the rotating cylinder 72 is fixed, that is, the moving plate group 77 shows a downward trend relative to the bottom of the rotating cylinder 72, thereby driving the connecting block 712 to move downward inside the drill bit 6 to assist the drill bit 6 in unloading soil. Similarly, when the second motor 78 starts to rotate reversely, it can drive the connecting block 712 to move upward inside the drill bit 6, facilitating the drill bit 6 to perform the next drilling. When the first motor 74 starts to rotate forward or reversely, it drives the gear to rotate forward. Through the meshing of the gear and the half gear 73, it can drive the rotating cylinder 72 to rotate reversely or forward. Then, through the second guide post 711 slidably connected to the rotating cylinder 72 and the lead screw 79 connected to the rotating cylinder 72, it can drive the connecting arm 7122 to rotate inside the drill bit 6, adjust the cleaning angle, so that the connecting part of the connecting arm 7122 and the connecting center 7121 can clean the top inside the drill bit 6.

[0060] Drilling method of a rotary drilling rig for construction improvement and convenient transportation:

[0061] Step 1: Drive the rotary drilling rig to the position where drilling is required, control the hoisting mechanism 3 and the luffing mechanism 4 to start, so that the mast 45 is vertical and corresponds to the drilling position.

[0062] Step 2: Control the power head 52 to start, drive the drill pipe 51 to rotate, and at the same time control the hoisting mechanism 3 to pay out the rope, and drill the hole to be drilled by the drill bit 6.

[0063] After drilling to a certain depth, lift the drill bit 6 out of the hole for soil unloading, drive the cleaning part to assist the drill bit 6 in unloading soil, and the pressure analysis module obtains the pressure data during drilling and soil unloading of the drill bit 6, and judges the soil volume situation inside the drill bit 6 during drilling and the cleaning situation inside the drill bit 6 during soil unloading according to the pressure data.

[0064] Specifically, a pressure threshold and a quantity threshold are set in the pressure analysis module. The pressure threshold is denoted as F, and the quantity threshold is denoted as N. F is used to determine whether the amount of soil inside the drill bit 6 reaches the maximum value during drilling, that is, to judge the resistance when unloading soil inside the drill bit 6. N is used to determine the number of pressure sensors 717 exceeding the pressure range, and then to judge the difficulty of unloading soil by the drill bit 6. N is at least more than half of the number of pressure sensors 717.

[0065] A counting sub-module is also set in the pressure analysis module. The counting sub-module is used to count the pressure sensors 717 whose actual pressure data exceeds the pressure threshold.

[0066] During drilling: The drill bit 6 moves downward and keeps rotating. The soil generated during drilling enters the inside of the drill bit 6, causing the slider 713 to slide upward relative to the inside of the drill bit 6 under the action of the connecting arm 7122 and the soil inside the drill bit 6 in the second chute of the connecting arm 7122, compressing the spring 714. The pressure sensor 717 obtains pressure data, and the pressure analysis module obtains the pressure data detected by several pressure sensors 717. The obtained actual pressure value is denoted as f i , i ∈ [1, k], k is the actual number of pressure sensors 717, N ≥ 0.5k;

[0067] When f i > F, the counting sub-module performs intermittent counting, and the count value is n. When n ≥ N, it means that the amount of soil inside the drill bit 6 reaches the expected set amount, and an alarm prompt is given. It is necessary to unload the soil to avoid the situation where the drill bit 6 is covered due to too much soil drilling when simply relying on the operator's experience to judge the amount of soil drilling, making it difficult to take out the drill bit 6 from the hole, and the situation where too little soil is drilled, resulting in frequent drilling and delaying the normal drilling progress. If the above situation does not occur after continuous drilling for a certain period of time, the pressure analysis module gives an alarm prompt and controls the unloading of soil at the same time. The specific continuous drilling time is set manually to avoid abnormal soil quality at the drilling site and damaging the drill bit 6.

[0068] When unloading soil: The operator operates the control end to drive the drill bit 6 to the edge of the hole, opens the lid on the top of the drill bit 6, and at the same time controls the motor two 78 to start rotating forward, driving the connecting arm 7122 downward, causing the slider 713 to slide upward relative to the inside of the drill bit 6 under the action of the connecting arm 7122 and the soil inside the drill bit 6 in the second chute of the connecting arm 7122, compressing the spring 714. The pressure sensor 717 obtains pressure data, and the pressure analysis module obtains the pressure data detected by several pressure sensors 717. The obtained time pressure value is denoted as f i ’, i ∈ [1, k], k is the actual number of pressure sensors 717;

[0069] When f iWhen f ’>F, the pressure data obtained by the corresponding pressure sensor 717 is large, the cleaning resistance of the corresponding connecting arm 7122 is large, and the counting sub-module performs intermittent counting, and the count value is x;

[0070] At f i When f ’≤F, the pressure data obtained by the corresponding pressure sensor 717 is normal, the cleaning resistance of the corresponding connecting arm 7122 is large, and the counting sub-module performs intermittent counting, and the count value is y;

[0071] When x = y, the resistance during soil discharge of the auxiliary drill bit 6 of the cleaning part is uneven. The first motor 74 starts to rotate forward and backward alternately, driving the connecting arm 7122 to rotate inside the drill bit 6, adjusting the contact position, so that the resistance during soil discharge of the auxiliary drill bit 6 of the cleaning part is uniform, thereby avoiding that when the resistance during soil discharge of the auxiliary drill bit 6 of the cleaning part is uneven, it tilts to one side, causing irreparable damage to the equipment of the cleaning mechanism 7 and the drill bit 6, such as deformation of the lead screw 79, scratches inside the drill bit 6, etc. If x = y still exists after adjustment for a certain period of time, the first motor 74 will no longer rotate forward and backward alternately, and the second motor 78 will no longer continue to drive the cleaning part to clean the inside of the drill bit 6, and the analysis and alarm module will give an alarm prompt for the staff to handle.

[0072] When x≠y, the resistance during soil discharge of the auxiliary drill bit 6 of the cleaning part is uniform:

[0073] Case 1: When x≥N, the viscosity between the soil during drilling and the inside of the drill bit 6 is large, resulting in a large resistance during soil discharge of the auxiliary drill bit 6 of the cleaning part. Control the second motor 78 to reduce the speed to avoid damage to the cleaning part caused by the high speed of the second motor 78, which drives the connecting arm 7122 to move downward quickly, until all the soil inside the drill bit 6 is cleaned. In the next drilling operation, abnormal handling operations are required;

[0074] Case 2: When y≥N, the resistance during soil discharge of the auxiliary drill bit 6 of the cleaning part is normal. Control the second motor 78 to maintain the current speed and drive the connecting arm 7122 to move downward to clean the inside of the drill bit 6;

[0075] Abnormal handling operation: When the drill bit 6 drills, the second motor 78 drives the cleaning part to be located at the bottom of the drill bit 6. Then, while the drill bit 6 is drilling, the second motor 78 starts to reverse, the first motor 74 starts to rotate forward and backward alternately, and keeps the pressure data obtained by several pressure sensors 717 not exceeding the pressure threshold until the soil volume inside the drill bit 6 reaches the maximum, and f i >F, n≥N, soil discharge is carried out. By this method, it can be ensured that the soil generated when entering the drill hole enters the drill bit 6 evenly, and the cleaning part can distribute it evenly inside the drill bit 6, avoiding the long strip-shaped soil generated directly adhering to the inner wall of the drill bit 6 and increasing the soil discharge difficulty.

[0076] In the above manner, it is possible to monitor the amount of soil inside the drill bit 6 during drilling, evenly distribute the soil entering the inside of the drill bit 6, avoid excessive accumulation at one place, which may cause the soil to adhere to the inner wall of the drill bit 6, thereby reducing the difficulty of soil discharge. It can also assist in soil discharge for the drill bit 6, further reducing the difficulty of soil discharge for the drill bit 6.

[0077] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0078] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rotary drilling rig with improved construction and convenient transportation, comprising a chassis (1), a turntable (2), a hoisting mechanism (3), a luffing mechanism (4), a driving mechanism (5), a drill bit (6), and a cleaning mechanism (7), characterized in that, The turntable (2) is arranged at the top of the chassis (1) and is rotationally connected to the chassis (1). The hoisting mechanism (3) and the luffing mechanism (4) are arranged on the turntable (2). The drill bit (6) and the cleaning mechanism (7) are arranged at the output end of the driving mechanism (5). The cleaning mechanism (7) is arranged above the drill bit (6). The cleaning mechanism (7) includes a protective cylinder (71), a rotating cylinder (72), a cleaning part, and a plurality of pressure sensors (717). The cleaning part includes a connecting block (712), a slider (713), and a spring (714). The connecting block (712) includes a connecting center (7121) and a plurality of connecting arms (7122). The outer wall of the radial direction of the connecting arm (7122) matches the inner diameter of the drill bit (6). A second chute is formed at the bottom of the periphery of the connecting arm (7122). The slider (713) is arranged in the second chute and is slidably connected to the connecting arm (7122). A plurality of the springs (714) are fixed to the top of the slider (713), and the other end of the spring (714) is fixedly connected to the connecting arm (7122). The pressure sensor (717) is arranged in the second chute and is fixedly connected to the connecting arm (7122). The pressure sensor (717) is electrically connected to a pressure analysis module. The pressure analysis module is used to obtain the pressure data collected by the pressure sensor (717), and judge the internal soil volume situation during the drilling of the drill bit (6) and the cleaning situation during soil unloading according to the obtained pressure data. A pressure threshold and a quantity threshold are set in the pressure analysis module. A counting sub-module is also arranged in the pressure analysis module. The counting sub-module is used to count the pressure sensors (717) whose actual pressure data exceeds the pressure threshold. The pressure analysis module is signal-connected to a control end, and the control end is also signal-connected to the hoisting mechanism (3), the luffing mechanism (4), the driving mechanism (5), and the cleaning mechanism (7).

2. The rotary drilling rig according to claim 1, which is improved in construction and convenient for transportation, is characterized in that, An operation room (21) and a support block (22) are arranged on the turntable (2). The operation room (21) is fixed on one side of the turntable (2) near the drill bit (6) at the top. The support block (22) is fixed on the other side of the turntable (2) away from the drill bit (6) at the top.

3. The rotary drilling rig according to claim 2, which is improved in construction and convenient for transportation, is characterized in that, The hoisting mechanism (3) includes a hoist (31), a plurality of pulleys (32), and a swivel (34). The hoist (31) is arranged at the center of the top of the turntable (2). The hoist (31) is connected with a hoisting rope (33). The end of the hoisting rope (33) away from the hoist (31) is connected to the swivel (34).

4. A rotary drilling rig with improved construction and convenient transportation according to claim 3, characterized in that, The luffing mechanism (4) includes two groups of hydraulic cylinders I (41), a hydraulic cylinder II (42), two groups of jibs (43), a tripod (44), and a mast (45). The mast (45) includes three apex angles. Both the hydraulic cylinder I (41) and the hydraulic cylinder II (42) include an output end and a fixed end. The fixed ends of the two groups of the first hydraulic cylinders (41) and the two groups of the swing arms (43) are both hinged to one side of the top of the turntable (2) close to the drill bit (6). The two groups of the first hydraulic cylinders (41) are horizontally arranged. The two groups of the swing arms (43) are respectively located on the upper and lower sides of the two groups of the first hydraulic cylinders (41). One group of the swing arms (43) located below the first hydraulic cylinder (41) is hinged to a vertex angle of the tripod (44). The vertex angle of the tripod (44) close to the drill bit (6) is hinged to the mast (45). The vertex angle of the tripod (44) far from the drill bit (6) is hinged to the swing arm (43) located above the first hydraulic cylinder (41), the output end of the first hydraulic cylinder (41), and the fixed end of the second hydraulic cylinder (42). The output end of the second hydraulic cylinder (42) is hinged to the mast (45). The hinge point of the second hydraulic cylinder (42) and the mast (45) is above the hinge point of the tripod (44) and the mast (45); A support leg (46) is slidably connected to the bottom of the mast (45), and a plurality of the pulleys (32) are connected to the mast (45) by bearings.

5. A rotary drilling rig with improved construction and convenient transportation according to claim 4, characterized in that, The driving mechanism (5) includes a drill pipe (51), a power head (52), and a third hydraulic cylinder (53). The power head (52) is arranged on one side of the mast (45) far from the turntable (2). The elevating gear (34) is arranged at the top of the drill pipe (51). The power head (52) and the drill pipe (51) are connected by a spline. A first chute is arranged on one side of the mast (45) close to the power head (52). The third hydraulic cylinder (53) includes an output end and a fixed end. The third hydraulic cylinder (53) is arranged in the first chute. The fixed end of the third hydraulic cylinder (53) is fixedly connected to the mast (45). The output end of the third hydraulic cylinder (53) is fixedly connected to the power head (52). The power head (52) is slidably connected to the mast (45); The drill bit (6) is fixed to the bottom of the drill pipe (51).

6. A rotary drilling rig with improved construction and convenient transportation according to claim 5, characterized in that, The protective cylinder (71) is fixed to the top of the drill bit (6). The rotating cylinder (72) is arranged inside the protective cylinder (71) and is rotatably connected to the protective cylinder (71). The cleaning part is arranged inside the drill bit (6). The pressure sensor (717) is arranged inside the drill bit (6); A semi-gear (73) is fixedly connected to the side wall of the rotating cylinder (72). A first motor (74) is fixedly connected to the bottom inside the protective cylinder (71). The output end of the first motor (74) is fixedly connected to a gear, and the gear meshes with the semi-gear (73).

7. A rotary drilling rig with improved construction and convenient transportation according to claim 6, characterized in that, A moving plate group (77) and a second motor (78) are arranged inside the rotating cylinder (72). A plurality of abutting blocks (75) are fixedly connected to the top inside the rotating cylinder (72). A plurality of first guide columns (76) are fixedly connected to the inside of the rotating cylinder (72). The moving plate group (77) includes two groups of sliding plates (771) and a plurality of sliding sleeves (772). The sliding sleeves (772) are fixed between the two groups of sliding plates (771). The sliding sleeves (772) are slidably sleeved on the periphery of the first guide columns (76); The second motor (78) is fixed to the top of the sliding plate (771) located above the sliding sleeve (772). The moving plate group (77) is connected by bearings to a number of lead screws (79). The second motor (78) is fixedly connected to one group of lead screws (79). A transmission part (710) is arranged between the two sliding plates (771), and the transmission part (710) is connected to a number of lead screws (79).

8. A rotary drilling rig with improved construction and convenient transportation according to claim 7, characterized in that, The lead screw (79) is threadedly connected to the bottom of the rotating cylinder (72). The connecting arm (7122) is fixedly connected to the connecting center (7121). The connecting arm (7122) is T-shaped. The lead screw (79) is connected by bearings to the connecting arm (7122).

9. A rotary drilling rig with improved construction and convenient transportation according to claim 8, characterized in that, A number of second guide posts (711) are fixedly connected to the bottom of the sliding plate (771) located below the sliding sleeve (772). The second guide posts (711) are arranged inside the inner circle of a number of lead screws (79). The other end of the second guide posts (711) is fixedly connected to the connecting arm (7122). The second guide posts (711) are slidably connected to the bottom of the rotating cylinder (72); A number of first arc-shaped grooves (715) and second arc-shaped grooves (716) are arranged at the top of the protective cylinder (71).

10. A rotary drilling rig with improved construction and convenient transportation according to claim 9, characterized in that, The drilling method of the construction-improved and transportation-convenient rotary drilling rig: Step 1: Drive the rotary drilling rig to the position where drilling is required. Control the hoisting mechanism (3) and the luffing mechanism (4) to start, so that the mast (45) is vertical and corresponds to the drilling position; Step 2: Control the power head (52) to start, drive the drill pipe (51) to rotate, and at the same time control the hoisting mechanism (3) to pay out the rope, and drill the hole to be drilled by the drill bit (6); Step 3: After drilling to a certain depth, lift the drill bit (6) out of the hole for soil unloading. Drive the cleaning part to assist the drill bit (6) in soil unloading. The pressure analysis module obtains the pressure data when the drill bit (6) drills and unloads soil, and judges the amount of soil inside the drill bit (6) during drilling and the cleaning condition inside the drill bit (6) during soil unloading according to the pressure data.

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