Soil throwing device, rotary drilling rig applying same and method

Abstract

The invention discloses a soil throwing device, a rotary drilling rig applying the same and a method, and belongs to the technical field of rotary drilling rigs. The soil throwing device comprises a drill bit, a main shaft, a soil throwing assembly and a butt joint assembly. A soil throwing assembly is arranged on the main shaft, and the top of the soil throwing assembly is connected with a rotary excavating drill rod through a butt joint assembly. In the soil throwing assembly shell, a main gear of a main shaft is matched with a first gear and a second gear which are meshed, and the two gears are eccentrically provided with vertical rods and alternately clamped into teeth of the main gear to achieve forward and reverse rotation switching of the main shaft. The butt joint assembly achieves butt joint or disconnection of the rotary excavating drill rod and the main shaft through matching and separation of a spline shaft and a spline sleeve. The rotary drilling rig comprises the soil throwing device, and according to the soil throwing method, the drill rod and the main shaft are separated, the soil throwing assembly drives the drill bit to automatically rotate forwards and backwards to throw soil, and then butt joint reset drilling is conducted. Power head switching does not need to be manually controlled, impact of a driving system is avoided, the service life of equipment is prolonged, and the soil throwing efficiency and the energy utilization rate are improved.

Description

Technical Field

[0001] This invention belongs to the field of rotary drilling rig technology, specifically relating to a soil-throwing device and a rotary drilling rig and method using the device. Background Technology

[0002] In fields such as building foundation construction and municipal engineering drilling, rotary drilling rigs have become core equipment for foundation construction due to their advantages such as high drilling efficiency and wide adaptability to various geological formations. Their working principle mainly involves a power head driving the rotary drill rod to rotate, which in turn drives the bottom drill bit to cut through the rock and soil. After the drill bit has accumulated a certain amount of excavated soil, the drill rod and drill bit are lifted to the ground by a winch system. The excavated soil is then removed by a soil-throwing or unloading mechanism. The drilling operation is then repeated until the preset depth of drilling is completed.

[0003] In existing technologies, rotary drilling rigs use manual left and right pushing of hydraulic or motor handles to control the main pump opening or motor rotation and speed, thereby controlling the forward and reverse rotation and speed of the power head. The inertial impact from the forward and reverse rotation of the power head then throws the soil out of the drill bit. However, manually controlling the drill bit's forward and reverse rotation to achieve soil throwing has the following drawbacks: 1. Manually controlling the forward and reverse rotation of the power head to drive the drill bit to throw soil requires the operator to control the timing of switching between forward and reverse rotation. Since the main pump and motor need a certain reaction time when switching between forward and reverse rotation, if the dwell time is too short, the main pump may not build up enough pressure or the motor may not have enough switching time, thus affecting the soil throwing effect. If the dwell time is too long, it will result in excessive rotational inertia, and the instantaneous switching of rotation direction will reduce the service life of the main pump or motor.

[0004] 2. Frequent switching between forward and reverse rotation of the power head has a significant impact on the drive system (hydraulic system or drive motor system), which can damage the drive system and reduce its lifespan. Summary of the Invention

[0005] To address the problems existing in the prior art, a soil-throwing device, a rotary drilling rig using the device, and a method are proposed.

[0006] The technical solution to the technical problem solved by the present invention is as follows: First, a soil-throwing device is proposed, characterized in that: it includes a drill bit connected to a main shaft, and a soil-throwing component is also connected to the main shaft. The soil-throwing component can rotate in both directions to drive the main shaft and the drill bit to rotate in both directions. A docking component is connected to the top of the soil-throwing component, and a rotary drilling rod is connected to the top of the docking component. The docking component can realize the docking of the rotary drilling rod with the main shaft.

[0007] Preferably, the soil-throwing assembly includes a housing, a main shaft that can slide and rotate vertically within the housing, and the top and bottom of the main shaft extending out of the housing; a main gear is connected to the main shaft and is disposed within the housing; a first gear and a second gear that mesh with each other are also rotatably connected within the housing, the first gear being connected to a driving component to drive rotation; several vertical rods are eccentrically arranged on both the first gear and the second gear, the vertical rods being able to engage with the teeth of the main gear to drive the main gear to rotate, and when the vertical rods on the first gear are in transmission with the main gear, the vertical rods on the second gear are separated from the main gear.

[0008] Preferably, a bushing that reduces friction is also rotatably connected to the vertical rod.

[0009] Preferably, the docking assembly includes a cover connected to the top of the housing; a connecting shaft is rotatably connected to the cover, the top of the connecting shaft is connected to the rotary drill rod, and the bottom of the connecting shaft extends into the cover and is connected to a spline shaft; the top of the corresponding main shaft extends into the cover and is connected to a slider, the top of the slider is connected to a spline sleeve, and the outer wall of the slider fits against the inner wall of the cover so that the spline sleeve slides vertically inside the cover; the spline shaft can be inserted into the spline sleeve to drive the main shaft to rotate.

[0010] Preferably, a return spring is also provided outside the spline shaft. The top of the return spring is connected to the top of the cover, and the bottom of the return spring is connected to the outer wall of the spline sleeve. The return spring can drive the spline sleeve to separate from the spline shaft.

[0011] Preferably, a connecting plate is also circumferentially connected to the outside of the cover, and the connecting plate is fixed to the top of the shell by fixing bolts; the connecting plate is also connected to the outer wall of the cover by several reinforcing ribs.

[0012] Preferably, the bottom of the slider is connected to a plug, and a slot is opened at the top of the spindle, so that the plug can be inserted into the slot; a flat-head screw is threaded on the side wall of the spindle, and the flat-head screw passes through the plug and the slot to realize the detachable connection between the spindle and the slider. Preferably, a limit block is also provided at the connection between the bottom of the spindle and the drill bit, which can prevent the housing from contacting the drill bit when the spindle moves vertically.

[0013] Secondly, a rotary drilling rig is proposed, including a drilling rig body, on which a battery assembly is provided. The battery assembly is electrically connected to the main winch motor, rotary motor, auxiliary winch motor, travel motor and power head motor inside the drilling rig body; the rotary drilling rod of the drilling rig body passes through the power head and is connected to the aforementioned soil-throwing device.

[0014] Finally, a method for soil removal using the rotary drilling rig described above is proposed, comprising the following steps: S1. Drilling down; driving the drill bit down to drill a hole; S2. Drilling resumes; the drive head and main winch drive the rotary drilling rod upwards, moving the soil-throwing device and drill bit above the ground. S3. Separation; Under the action of gravity and the return spring, the spline shaft separates from the spline sleeve, thereby separating the rotary drilling rod from the main shaft; S4. Move; drive the drilling rig body to move, bringing the drill bit into the soil-throwing hood; S5. Soil Throwing: Start the drive unit to drive the first gear and the second gear to rotate. When the vertical rod on the first gear is driven by the main gear, the main shaft drives the drill bit to rotate in the forward direction. When the vertical rod on the second gear is driven by the main gear, the main shaft drives the drill bit to rotate in the reverse direction, realizing the forward and reverse rotation of the drill bit to throw soil. S6. Return; drive the drilling rig body to move, bringing the drill bit to the construction surface; S7. Positioning; Start the rotary motor and drive the drill bit to the target position for secondary drilling; S8. Secondary drilling: The drill bit presses down on the ground, causing the spline sleeve to move upward. The power head drives the rotary drill rod to rotate until the spline shaft engages with the spline sleeve. At this time, the rotary drill rod drives the drill bit to rotate, thus achieving drilling. S9. Repeat S1-S8 until drilling is complete.

[0015] Compared with existing technologies, the above technical solution has the following advantages or beneficial effects: 1. This invention, by setting a soil-throwing component between the drill bit and the rotary drilling rod, and connecting the soil-throwing component to the rotary drilling rod through a docking component, enables the drill bit to rotate in both directions without driving the power head to rotate forward and backward, thus reducing the learning cost for operators.

[0016] 2. This invention achieves automatic mechanical switching between forward and reverse rotation of the drill bit through the eccentric vertical rod transmission structure of the first gear, second gear, and main gear in the soil-throwing assembly, eliminating the need for manual control of the hydraulic or motor handles and switching timing. This design not only avoids the problem of poor soil-throwing effect caused by inaccurate reaction time control during manual operation, ensuring stable and efficient soil-throwing quality; at the same time, the smooth switching of the mechanical transmission significantly reduces the impact of frequent alternation between forward and reverse rotation on the drive system (hydraulic or motor system) of the rotary drilling rig, effectively solving the pain points of easy damage and short lifespan of the main pump and motor in the prior art, and extending the service life of the core components of the equipment.

[0017] 3. This invention, through the spline shaft and spline sleeve mating structure of the docking assembly, enables automatic separation of the rotary drilling rod and main shaft during the soil-throwing stage. This allows the soil-throwing action to be driven by an independent drive component, rather than relying on the drilling rig's original power head system. This separate drive design avoids the power head from idling or bearing additional load during the soil-throwing process, reducing overall power consumption. Simultaneously, the power head only participates in the drilling stage, further reducing its operating losses and improving the overall energy efficiency of the machine. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] Figure 1 This is a schematic diagram of a rotary drilling rig that includes a soil-throwing device.

[0020] Figure 2 This is a cross-sectional view of the soil-throwing device.

[0021] Figure 3 This is a schematic diagram of the soil-throwing device for removing soil from the sidewalls of the shell. Figure 1 .

[0022] Figure 4 This is a schematic diagram of the soil-throwing device for removing soil from the sidewalls of the shell. Figure 2 .

[0023] Figure 5 This is a sectional view of the connection between the main shaft and the slider.

[0024] Figure 6 This is a diagram of a soil-spraying cover.

[0025] Explanation of reference numerals in the attached figures: 1. Drilling rig body; 11. Battery assembly; 12. Rotary drill rod; 13. Power head; 14. Drill bit; 2. Soil-throwing assembly; 21. Housing; 22. Main shaft; 23. Main gear; 24. First gear; 25. Second gear; 26. Vertical rod; 27. Bushing; 28. Drive component; 29. ​​Limiting block; 3. Connecting assembly; 31. Cover; 32. Connecting shaft; 33. Splined shaft; 34. Return spring; 35. Splined sleeve; 36. Slider; 37. Connecting plate; 38. Fixing bolt; 39. Insert block; 310. Slot; 311. Flathead screw; 312. Reinforcing rib; 4. Spread soil cover. Detailed Implementation

[0026] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure of the invention, components and arrangements of specific examples are described below. Furthermore, reference numerals and / or letters may be repeated in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted to avoid unnecessarily limiting the invention. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Example 1: The commonly used method of soil dumping, alternating forward and reverse rotation, not only requires a high level of operator skill but also severely damages the structural and fatigue strength of the drill rod, drill bit 14, and drilling rig, significantly shortening their service life. This embodiment proposes a soil dumping device to address this problem. This device can be applied not only to rotary drilling rigs but also, with fine-tuning capabilities, to other engineering machinery such as bucket drilling rigs and tunnel boring machines.

[0028] Please see Figures 1-5This embodiment proposes a soil-throwing device, including a drill bit 14 for drilling operations in direct contact with rock and soil. The drill bit 14 is fixed to the bottom end of the main shaft 22 through a detachable connection structure such as a threaded connection or a flange connection. The main shaft 22 is vertically arranged, and a soil-throwing assembly 2 is fixedly connected to the middle area of ​​the main shaft 22. The soil-throwing assembly 2 is an independent power drive structure with forward and reverse drive functions. It can drive the main shaft 22 to rotate in the forward and reverse directions along its axis through its own transmission mechanism, thereby synchronously driving the drill bit 14 connected to the main shaft 22 to achieve forward and reverse movement. A docking assembly 3 is connected to the top of the soil-throwing assembly 2. The top of the docking assembly 3 is designed with a connection structure adapted to the rotary drilling rod 12. The bottom end of the rotary drilling rod 12 can be inserted into the docking assembly 3. The docking assembly 3 can realize the power transmission docking between the rotary drilling rod 12 and the main shaft 22 through mechanical cooperation, ensuring that the rotational power of the rotary drilling rod 12 can be effectively transmitted to the main shaft 22 and the drill bit 14.

[0029] By integrating the drill bit 14, spindle 22, soil-throwing assembly 2, and docking assembly 3 into one unit, the device can simultaneously perform drilling and soil-throwing functions. It eliminates the need for operators of rotary drilling rigs to manually control the forward and reverse rotation of the drill bit 14 for soil-throwing. The forward and reverse rotation is independently achieved through the soil-throwing assembly 2, which eliminates the dependence on the power of the rotary drilling rod 12, simplifies the construction process, and provides a foundation for subsequent efficient soil-throwing operations.

[0030] Example 2: Continue reading Figures 1-5Based on Embodiment 2, this embodiment further designs the soil-throwing component 2. The soil-throwing component 2 includes a hollow cylindrical shell 21 made of high-strength alloy steel, possessing good compressive strength and wear resistance. A main shaft 22 is installed through the shell 21, and the main shaft 22 is connected to the shell 21 through a combination of linear bearings and rotary bearings, allowing the main shaft 22 to slide vertically within the shell 21 and rotate freely around its own axis. The top of the main shaft 22 extends upward beyond the top end face of the shell 21, and the bottom extends downward beyond the bottom end face of the shell 21, with the extension length meeting the connection requirements with the docking component 3 and the drill bit 14. A main gear 23 is fixedly mounted on the portion of the main shaft 22 located within the shell 21. A first gear 24 and a second gear 25 are rotatably connected to the shell 21 near the top and bottom via bearing seats, respectively. The first gear 24 and the second gear 25 have the same number of teeth and mesh with each other. The central axis of the first gear 24 is axially... The gear extends outward and is fixedly connected to the output shaft of the drive component 28, such as a hydraulic motor or servo motor, via a coupling. The drive component 28 provides power to drive its rotation. Several vertical rods 26 are eccentrically arranged in the circumferential direction on the end faces of the first gear 24 and the second gear 25. The vertical rods 26 are perpendicular to the end faces of the gears and are fixed by welding. The vertical rods 26 are also rotatably connected to the bushings 27 to reduce friction. The bushings 27 convert the sliding friction between the vertical rods 26 and the main gear 23 into rolling friction, which greatly reduces the friction force in the transmission process, reduces the wear rate of the parts, and extends the service life of the vertical rods 26 and the main gear 23. The number of vertical rods 26 is matched with the tooth pitch of the main gear 23, so that they can be precisely engaged in the tooth grooves of the main gear 23 and drive the main gear 23 to rotate. Through the design of the gear meshing transmission relationship, when the vertical rods 26 on the first gear 24 are engaged with the tooth grooves of the main gear 23 to achieve transmission, the vertical rods 26 on the second gear 25 are exactly completely separated from the tooth grooves of the main gear 23, and vice versa.

[0031] When the rotary drill rod 12 moves upward and the drill bit 14 moves to the ground at the drilling site, the drive component 28 can be activated to drive the first gear 24 to rotate. The second gear 25, which meshes with the first gear 24, rotates in the opposite direction under the drive of the first gear 24. First, the vertical rod 26 on the first gear 24 contacts and drives the main gear 23 to rotate in the forward direction. The main gear 23 then drives the main shaft 22 and the drill bit 14 at the bottom to rotate in the forward direction, realizing forward soil throwing. When the last vertical rod 26 on the first gear 24 separates from the main gear 23, the vertical rod 26 on the second gear 25 begins to contact the main gear 23 and drives the main gear 23 to rotate in the reverse direction, thereby driving the main shaft 22 and the drill bit 14 to rotate in the reverse direction. The interval time between the transmission of the main gear 23 and the first gear 24 and the second gear 25 can be set to be longer, thereby reducing the shear force on the main gear 23 when switching between forward and reverse directions and extending the service life of the soil throwing component 2.

[0032] Example 3: Continue reading Figures 1-5 Based on Embodiment 2, a docking component 3 is designed for the soil-throwing component 2, including a cover 31. A connecting shaft 32 is rotatably connected to the cover 31. The top of the connecting shaft 32 is connected to the rotary drilling rod 12, and the bottom of the connecting shaft 32 extends into the cover 31 and is connected to a spline shaft 33. The top of the corresponding main shaft 22 extends into the cover 31 and is connected to a slider 36. The top of the slider 36 is connected to a spline sleeve 35. The outer wall of the slider 36 fits against the inner wall of the cover 31, allowing the spline sleeve 35 to slide vertically within the cover 31. The spline shaft 33 can be inserted into the spline sleeve 35, thereby driving the main shaft 22 to rotate. The cover 31 provides protection for the internal components, preventing dust, soil and other impurities from entering. At the same time, the tight fit between the slider 36 and the cover 31 effectively prevents radial swaying of the components during movement, improving the stability of the overall structure. The cover 31 is connected to the top of the housing 21. The sliding fit structure between the slider 36 and the cover 31, combined with the separable design of the spline shaft 33 and the spline sleeve 35, enables quick separation and docking between the rotary drilling rod 12 and the main shaft 22, meeting the switching requirements between soil dumping and drilling operations.

[0033] In addition, a return spring 34 is provided outside the spline shaft 33. The top of the return spring 34 is connected to the top of the cover 31, and the bottom of the return spring 34 is connected to the outer wall of the spline sleeve 35. The return spring 34 can drive the spline sleeve 35 to separate from the spline shaft 33. With the synergistic effect of the elastic force of the return spring 34 and gravity, the spline shaft 33 and the spline sleeve 35 are automatically separated without manual operation, improving work efficiency and reducing manual labor intensity. The return spring 34 provides a continuous and stable elastic force, ensuring that the spline sleeve 35 can completely disengage from the spline shaft 33 when separation is required, avoiding the impact of incomplete separation on subsequent soil-throwing operations.

[0034] During drilling operations, driven by the main winch, the rotary drill rod 12 moves downward, causing the drill bit 14 to contact the ground. Under the gravity of the rotary drill rod 12, the spline sleeve 35 gradually compresses the return spring 34 and gradually moves towards the spline shaft 33. The start-up power head 13 drives the rotary drill rod 12 to rotate slowly, so that the spline sleeve 35 and the spline shaft 33 are connected in a slow movement. After the connection is completed, the rotary drill rod 12 will have a downward displacement, and at the same time the drill bit 14 starts to rotate and drill down. At this time, the power of the power head 13 can be increased to start the drilling operation.

[0035] When soil needs to be thrown, the main winch moves the rotary drill rod 12 out of the ground and drives the drill body 1 to move to the side of the soil throwing cover 4 set on the ground, and moves the drill bit 14 into the soil throwing cover 4, but does not touch the ground; at this time, under the gravity of the drill bit 14 and the action of the return spring 34, the spline shaft 33 separates from the spline sleeve 35. At this time, the rotation of the main shaft 22 cannot be transmitted to the rotary drill rod 12, and the soil throwing assembly 2 is started to throw soil.

[0036] In this embodiment, a connecting plate 37 is also circumferentially connected to the outside of the cover 31. The connecting plate 37 is fixed to the top of the housing 21 by fixing bolts 38. Several reinforcing ribs 312 are also connected to the connecting plate 37 and the outer wall of the cover 31. The cover 31 and the housing 21 are detachably connected by fixing bolts 38, which facilitates the maintenance of the docking assembly 3 inside the cover 31.

[0037] Furthermore, in this embodiment, the bottom of the slider 36 is connected to the insert block 39, and a slot 310 is opened at the top of the spindle 22, allowing the insert block 39 to be inserted into the slot 310. A flat-head screw 311 is threaded onto the side wall of the spindle 22, passing through the insert block 39 and the slot 310 to achieve a detachable connection between the spindle 22 and the slider 36. When replacement is needed, the cover 31 is opened, and the drill bit 14 is placed vertically on the ground. Under the action of gravity, the spindle 22 at the position of the flat-head screw 311 will move upward and be exposed outside the housing 21. At this time, the flat-head screw 311 can be removed to separate the spline sleeve 35 from the spindle 22, thereby replacing the vulnerable part, the spline sleeve 35.

[0038] A limit block 29 is also provided at the connection between the bottom of the spindle 22 and the drill bit 14. The limit block 29 can prevent the housing 21 from contacting the drill bit 14 when the spindle 22 moves vertically.

[0039] Example 4: Please see Figure 1 This embodiment proposes a rotary drilling rig, which is an electrically driven rotary drilling rig, including a drilling rig body 1. The drilling rig body 1 is equipped with a battery assembly 11, which is electrically connected to the main winch motor, rotary motor, auxiliary winch motor, travel motor and power head 13 motor in the drilling rig body 1. The rotary drilling rod 12 of the drilling rig body 1 passes through the power head 13 and is connected to the soil-throwing device described in embodiments one to four.

[0040] The main controller of the rotary drilling rig is electrically connected to the battery pack 11. The main controller is suitable for connecting to and supplying power to one or more of the following devices: the main winch motor, the battery, the electric heater, the air conditioning system, and the travel motor. The auxiliary controller is also electrically connected to the battery pack 11. The auxiliary controller is suitable for connecting to and supplying power to one or more of the following devices: the rotary motor, the auxiliary winch motor, the travel motor, and the power head motor. By dividing the controller into a main controller and an auxiliary controller, and ensuring that the line current of each controller is met, the battery pack 11 can supply power to multiple drive motors through multiple controllers, thus achieving power supply to all motors and improving the power distribution capability of the purely motor-driven electric rotary drilling rig.

[0041] The aforementioned main winch motor is used to control the raising and lowering of the main winch wire rope of the electric rotary drilling rig. Specifically, the main winch motor includes a shaft. After the main controller controls the battery pack to energize the main winch motor, it can cause the shaft to rotate forward or backward, thereby realizing the winding and unwinding of the wire rope. The aforementioned battery mainly supplies power to the electrical equipment inside the vehicle. After the main controller controls the battery pack 11 to energize the battery, it can charge the battery. After the battery discharges, it can supply power to various electrical devices inside the vehicle, such as the main controller, auxiliary controller, and drive unit 28, etc. Those skilled in the art can determine the specific equipment connected to the battery according to actual working needs.

[0042] Example 5: Based on the above embodiments, a soil-spraying method is proposed, including the following steps: S1. Drilling down; drive drill bit 14 to drill a hole; S2. Drilling is completed; the drive head 13 and the main winch drive the rotary drilling rod 12 upward, which in turn moves the soil-throwing device and the drill bit 14 above the ground. S3. Separation; Under the action of gravity and return spring 34, spline shaft 33 separates from spline sleeve 35, thereby separating rotary drilling rod 12 from main shaft 22; S4. Move; drive the drilling rig body 1 to move, bringing the drill bit 14 into the soil-throwing cover 4; S5. Soil Throwing; Start the drive unit 28, which drives the first gear 24 and the second gear 25 to rotate. When the vertical rod 26 on the first gear 24 is driven by the main gear 23, the main shaft 22 drives the drill bit 14 to rotate in the forward direction. When the vertical rod 26 on the second gear 25 is driven by the main gear 23, the main shaft 22 drives the drill bit 14 to rotate in the reverse direction, thus realizing the forward and reverse rotation of the drill bit 14 to throw soil. S6. Return; drive the drilling rig body 1 to move, bringing the drill bit 14 to the construction road surface; S7. Positioning; Start the rotary motor and drive drill bit 14 to the target position for secondary drilling; S8. Secondary drilling: The drill bit 14 presses down on the ground, causing the spline sleeve 35 to move upward. The power head 13 drives the rotary drilling rod 12 to rotate until the spline shaft 33 engages with the spline sleeve 35. At this time, the rotary drilling rod 12 drives the drill bit 14 to rotate, realizing the drilling. S9. Repeat S1-S8 until drilling is complete.

[0043] Although the specific embodiments of the invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the invention. Based on the technical solutions of the invention, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the invention.

Claims

1. A soil-throwing device, characterized in that: Includes a drill bit (14), which is connected to the main shaft (22). The main shaft (22) is also connected to a soil-throwing assembly (2). The soil-throwing assembly (2) can rotate in both directions, driving the main shaft (22) and the drill bit (14) to rotate in both directions. The top of the soil-throwing assembly (2) is connected to a docking assembly (3). The top of the docking assembly (3) is connected to a rotary drilling rod (12). The docking assembly (3) can dock the rotary drilling rod (12) with the main shaft (22).

2. The soil-throwing device according to claim 1, characterized in that: The soil-throwing assembly (2) includes a housing (21), a main shaft (22) that can slide and rotate vertically within the housing (21), and the top and bottom of the main shaft (22) extending out of the housing (21); a main gear (23) is connected to the main shaft (22), and the main gear (23) is located inside the housing (21); a first gear (24) and a second gear (25) that mesh with each other are also rotatably connected inside the housing (21), and the first gear (24) is connected to a drive unit (28) to drive rotation; several vertical rods (26) are eccentrically arranged on the first gear (24) and the second gear (25), and the vertical rods (26) can be engaged in the teeth of the main gear (23) to drive the main gear (23) to rotate. When the vertical rods (26) on the first gear (24) are in transmission with the main gear (23), the vertical rods (26) on the second gear (25) are separated from the main gear (23).

3. The soil-throwing device according to claim 2, characterized in that: The vertical rod (26) is also rotatably connected to a bushing (27) to reduce friction.

4. A soil-throwing device according to claim 2, characterized in that: The docking assembly (3) includes a cover (31) connected to the top of the housing (21); a connecting shaft (32) is rotatably connected to the cover (31), the top of the connecting shaft (32) is connected to the rotary drilling rod (12), and the bottom of the connecting shaft (32) extends into the cover (31) and is connected to the spline shaft (33); the top of the corresponding main shaft (22) extends into the cover (31) and is connected to the slider (36), the top of the slider (36) is connected to the spline sleeve (35), and the outer wall of the slider (36) fits against the inner wall of the cover (31) so that the spline sleeve (35) slides vertically inside the cover (31); the spline shaft (33) can be inserted into the spline sleeve (35) to drive the main shaft (22) to rotate.

5. A soil-throwing device according to claim 4, characterized in that: A return spring (34) is also provided outside the spline shaft (33). The top of the return spring (34) is connected to the top of the cover (31), and the bottom of the return spring (34) is connected to the outer wall of the spline sleeve (35). The return spring (34) can drive the spline sleeve (35) to separate from the spline shaft (33).

6. A soil-throwing device according to claim 4, characterized in that: A connecting plate (37) is also circumferentially connected to the outside of the cover (31). The connecting plate (37) is fixed to the top of the shell (21) by fixing bolts (38). Several reinforcing ribs (312) are also connected to the connecting plate (37) and the outer wall of the cover (31).

7. A soil-throwing device according to any one of claims 2-6, characterized in that: The bottom of the slider (36) is connected to the insert (39), and a slot (310) is opened on the top of the spindle (22). The insert (39) can be inserted into the slot (310). A flat-head screw (311) is threaded on the side wall of the spindle (22). The flat-head screw (311) passes through the insert (39) and the slot (310) to realize the detachable connection between the spindle (22) and the slider (36).

8. A soil-throwing device according to any one of claims 2-6, characterized in that: A limit block (29) is also provided at the connection between the bottom of the spindle (22) and the drill bit (14). The limit block (29) can prevent the housing (21) from contacting the drill bit (14) when the spindle (22) moves vertically.

9. A rotary drilling rig, comprising a drilling rig body (1), wherein a battery assembly (11) is provided on the drilling rig body (1), and the battery assembly (11) is electrically connected to a main winch motor, a rotary motor, an auxiliary winch motor, a travel motor and a power head (13) motor within the drilling rig body (1); characterized in that: The rotary drilling rod (12) of the drilling rig body (1) passes through the power head (13) and connects to the soil-throwing device according to any one of claims 2-8.

10. A method for soil removal using the rotary drilling rig according to claim 9, characterized in that... Includes the following steps: S1. Drill down; drive the drill bit (14) to drill a hole; S2. Drilling is completed; the drive head (13) and the main winch drive the rotary drilling rod (12) upward, which in turn moves the soil-throwing device and the drill bit (14) above the ground. S3. Separation; Under the action of gravity and the return spring (34), the spline shaft (33) separates from the spline sleeve (35), thereby separating the rotary drilling rod (12) from the main shaft (22); S4. Move; drive the drilling rig body (1) to move, and move the drill bit (14) into the soil-throwing cover (4); S5. Soil Throwing; Start the drive unit (28), which drives the first gear (24) and the second gear (25) to rotate. When the vertical rod (26) on the first gear (24) is driven by the main gear (23), the main shaft (22) drives the drill bit (14) to rotate in the forward direction. When the vertical rod (26) on the second gear (25) is driven by the main gear (23), the main shaft (22) drives the drill bit (14) to rotate in the reverse direction, thereby realizing the forward and reverse rotation of the drill bit (14) to throw soil. S6. Return; drive the drilling rig body (1) to move, and bring the drill bit (14) to the construction road surface; S7. Positioning; Start the rotary motor and drive the drill bit (14) to the target position for secondary drilling; S8. Secondary drilling; The drill bit (14) presses down on the ground, causing the spline sleeve (35) to move upward. The power head (13) drives the rotary drilling rod (12) to rotate until the spline shaft (33) engages with the spline sleeve (35). At this time, the rotary drilling rod (12) drives the drill bit (14) to rotate, thus realizing the drilling. S9. Repeat S1-S8 until drilling is complete.

Images