Pile foundation rotary excavating device capable of efficiently cutting stones and using method of pile foundation rotary excavating device

Abstract

The invention discloses a pile foundation rotary excavating device capable of efficiently cutting stones and a using method of the pile foundation rotary excavating device, and relates to the technical field of pile foundation construction equipment. The pile foundation rotary excavating device capable of efficiently cutting stones comprises a bearing unit, a mast unit and a rotary excavating bucket, the mast unit is connected to the bearing unit, the rotary excavating bucket is connected to the bottom of the mast unit, the rotary excavating bucket comprises a bucket body, a rotary excavating disc and a clamping piece, the rotary excavating disc is provided with a plate body, and the clamping piece is arranged on the plate body. An impact hammer and dredging teeth are inserted into the inner side of the plate body, an oil return pipe is connected to the outer side of the impact hammer, and the oil return pipe is connected to the outer side of the dredging teeth and used for returning oil to the dredging teeth. According to the pile foundation rotary excavating device capable of efficiently cutting stones and the using method thereof, a closed-loop control system composed of the pressure sensor and the electromagnetic valve can monitor the stress state of the dredging teeth in real time, automatic pressure relief is achieved when the stress state exceeds a threshold value, meanwhile, element abrasion is reduced through a hydraulic oil circulating system, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This invention relates to the field of pile foundation construction equipment technology, specifically to a rotary drilling device for pile foundations that can efficiently cut rocks and its usage method. Background Technology

[0002] Pile foundation construction equipment is widely used in pile foundation projects in fields such as construction, municipal engineering, and transportation. Rotary drilling rigs are one of the commonly used pieces of equipment during pile foundation construction.

[0003] In existing technologies, when rotary drilling pile foundations encounter isolated boulders, the boulders are broken by grinding them with the rotation of the rotary drilling head. Since the grinding process relies on the passive friction between the cutting teeth and the boulders, the breaking efficiency is extremely low. This results in an excessively long time spent dealing with isolated boulders during single pile construction, which significantly prolongs the construction cycle. At the same time, long-term grinding will aggravate the wear of the cutting teeth of the rotary drilling head, requiring frequent shutdowns for replacement, which further increases construction costs and time.

[0004] When encountering hard geological conditions such as isolated boulders, traditional rotary drilling rigs often face the problem of low rock-cutting efficiency, which not only affects the construction progress, but also easily leads to equipment damage due to excessive continuous stress. Summary of the Invention

[0005] The purpose of this invention is to provide a rotary drilling device for pile foundations that can efficiently cut rocks and its method of use, so as to solve the problem mentioned in the background art that traditional rotary drilling devices often face the problem of low rock-cutting efficiency when encountering hard geological conditions such as isolated rocks, which not only affects the construction progress, but also easily leads to equipment damage due to excessive continuous stress.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rotary drilling device for pile foundations capable of efficiently cutting rocks and its method of use, comprising a bearing unit, a mast unit, and a rotary drilling bucket. The mast unit is connected to the bearing unit, and the rotary drilling bucket is connected to the bottom of the mast unit. The rotary drilling bucket includes a bucket body, a rotary drilling disc, and a clamping component. The rotary drilling disc is provided with a plate, and an impact hammer and dredging teeth are inserted into the inner side of the plate. A return oil pipe is connected to the outer side of the impact hammer and is connected to the outer side of the dredging teeth for returning oil to the dredging teeth. A one-way valve is provided on the return oil pipe. An oil outlet pipe is connected to the outer side of the cylinder of the dredging teeth, and the other end of the oil outlet pipe is connected to an oil tank. A solenoid valve is provided on the oil outlet pipe, and the solenoid valve is electrically connected to a pressure sensor. The pressure sensor is located inside the cylinder of the dredging teeth. A second oil injection pipe is connected to the outer side of the oil tank for injecting oil into the cylinder of the impact hammer. A one-way valve is provided on the second oil injection pipe.

[0007] Preferably, the carrying unit includes a tracked vehicle and a winch. The top of the tracked vehicle is connected to a positioning anchor point and a connecting anchor point. The positioning anchor point and the connecting anchor point are connected to a support structure. The support structure includes a main support plate, a support rod, and a triangular connecting plate. The main support plate and the support rod are inserted into the connecting anchor point.

[0008] Preferably, a rod is inserted into the inner side of the triangular connecting plate, and two sets of rods are provided, which are respectively inserted into the inner side of the main support plate and the support rod. An adjusting hydraulic rod is sleeved on the outer side of one set of rods, and an inclined hydraulic rod is sleeved on the outer side of the other set of rods; a cable is wound on the winch.

[0009] Preferably, the mast unit includes a main mast and a tube-rubbing power head. Sliding guide rails are connected to both sides of the main mast, a positioning block is connected to the front side of the main mast, a flag plate is connected to the top of the main mast, a pulley is inserted into the inner side of the flag plate, and a back wheel, an adjusting anchor point and a fixed anchor point are connected from top to bottom on the rear side of the main mast.

[0010] Preferably, the tube-rubbing power head is engaged with the outer side of the main rod and the sliding guide rail. A lifting hydraulic rod is connected to the top of the tube-rubbing power head, and the lifting hydraulic rod is connected to the bottom of the positioning block. A drill rod is inserted into the inner side of the tube-rubbing power head, and a cable is connected to the top of the drill rod. The cable is wound around the inner side of the back wheel and around the top of the pulley.

[0011] Preferably, a connector is inserted into the inner side of the drill pipe, a spring is sleeved on the outer side of the connector, a connector head is connected to the bottom of the connector, a rotating shaft is inserted into the connector head, a clamping block is sleeved on the outer side of the rotating shaft, and a sliding sleeve is sleeved on the outer side of the clamping block.

[0012] Preferably, a positioning sleeve is connected to the outer side of the bucket body, and a shaft is inserted into the inner side of the positioning sleeve; a millimeter-wave radar is installed on the inner side of the plate body for detecting boulders, and a mud-swallowing port is opened on the plate body; a toothed rod is inserted into the inner side of the dredging teeth; an output rod is inserted into the inner side of the impact hammer; a first oil injection pipe is connected to the outer side of the oil tank, and the first oil injection pipe is connected to the outer side of the impact hammer for injecting oil into the oil cylinder of the impact hammer to retract the output rod.

[0013] Preferably, a cutting component is connected to the bottom of the plate, the cutting component is configured as an arc-shaped plate, and the bottom of the cutting component has serrations for cutting boulders. A rotating assembly is connected to the top of the plate, the rotating assembly is sleeved on the outside of the shaft, and a sealing shell is connected to the top of the plate. The sealing shell is used to sleeve the impact hammer, dredging teeth, and oil tank.

[0014] Preferably, the rotary drilling disc is connected to the bottom of the bucket body, the clamping member is connected to the top of the bucket body, the clamping member is clamped by the clamping block and inserted into the inner side of the sliding sleeve.

[0015] A method for using a rotary drilling rig for pile foundations capable of efficiently cutting rock includes the following steps: S1: Drive the tracked vehicle to the construction position and adjust the adjusting hydraulic rod and tilting hydraulic rod of the support structure to make the main support plate and support rod firmly supported on the ground; S2: Start the winch and the pipe-rolling power head, and adjust the height and position of the drill rod through the cable and the lifting hydraulic rod to bring the rotary bucket to the designated construction position; S3: The drill rod drives the rotary bucket to rotate, and the dredging teeth on the rotary disc dig through the toothed rod. The excavated soil enters the bucket body through the mud inlet. S4: When the millimeter-wave radar detects a boulder, the oil tank injects oil into the cylinder of the impact hammer through the second oil injection pipe. The output rod of the impact hammer extends to impact the boulder, and at the same time, the saw teeth of the cutting part cut the boulder. S5: When the dredging tooth is working, when the dredging tooth encounters a boulder, the tooth rod retracts inward. The pressure sensor monitors the pressure inside the cylinder. When the set value is reached, the solenoid valve opens, and the oil flows back to the oil tank through the oil outlet pipe. At this time, the pressure inside the oil tank increases, forcing the impact hammer to start. When the output pipe of the impact hammer retracts, it generates return oil. The return oil flows back to the cylinder of the dredging tooth through the return oil pipe, causing the tooth rod to extend again for reset. S6: When the amount of excavated soil in the bucket reaches a certain level, lift the rotary excavator bucket and discharge the excavated soil. Repeat steps S3-S5 until the construction is completed.

[0016] The technical effects and advantages of this invention are as follows: This efficient rock-cutting rotary drilling device for pile foundations and its usage method, along with the closed-loop control system composed of pressure sensors and solenoid valves, can monitor the stress state of the dredging teeth in real time and automatically release pressure when the threshold is exceeded. At the same time, the hydraulic oil circulation system reduces component wear and improves the service life of the equipment.

[0017] This invention relates to a rotary drilling device for pile foundations that can efficiently cut rocks and its usage method. By setting an impact hammer, dredging teeth and cutting parts on the plate of the rotary drilling disc, and cooperating with millimeter-wave radar to detect boulders, the device can quickly activate the impact function when encountering boulders, which greatly improves the rock cutting efficiency and reduces construction time. 3. The rotary drilling device for pile foundations that can efficiently cut rocks and its usage method: The support structure of the bearing unit is composed of main support plate, support rod, triangular connecting plate, etc. The support angle and force can be adjusted by adjusting the hydraulic rod and tilting hydraulic rod, which improves the stability of the device in complex terrain and ensures construction accuracy and safety. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the bearing unit of the present invention; Figure 3 This is a schematic diagram of the supporting beam structure of the present invention; Figure 4 This is a schematic diagram of the mast structure of the present invention; Figure 5 This is a partial structural diagram of the drill pipe of the present invention; Figure 6 This is a schematic diagram of the structure of the rotary digging bucket of the present invention; Figure 7 This is a schematic diagram of the rotary drilling disc of the present invention; Figure 8 This is a schematic diagram of the top structure of the rotary drilling rig of the present invention; Figure 9 This is a schematic diagram of the dredging teeth and impact hammer of the present invention.

[0020] In the diagram: 1. Bearing unit; 11. Tracked vehicle; 111. Positioning anchor point; 112. Connecting anchor point; 113. Support structure; 1131. Main support plate; 1132. Support rod; 1133. Triangular connecting plate; 1134. Insert rod; 1135. Adjusting hydraulic rod; 1136. Inclining hydraulic rod; 12. Winch; 121. Cable; 2. Mast unit; 21. Main mast; 211. Sliding guide rail; 212. Positioning block; 213. Flag plate; 2131. Pulley; 214. Back wheel; 215. Adjusting anchor point; 216. Fixed anchor point; 22. Pipe rolling power head; 221. Lifting hydraulic rod; 222. Drill rod; 2221. 2222, spring; 2223, connector; 2224, rotating shaft; 2225, clamping block; 2226, sliding sleeve; 3, rotary bucket; 31, bucket body; 311, positioning sleeve; 312, shaft; 32, rotary disc; 321, plate; 3211, impact hammer; 32111, return oil pipe; 32112, output rod; 3212, dredging tooth; 32121, toothed rack; 32122, oil outlet pipe; 3213, mud inlet; 3214, oil tank; 32141, first oil injection pipe; 32142, second oil injection pipe; 322, cutting component; 323, rotating assembly; 324, sealing shell; 33, clamping component. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] This invention discloses a rotary drilling device for pile foundations capable of efficiently cutting rocks and its method of use, according to the appendix. Figure 1 As shown, it includes a support unit 1, a mast unit 2, and a rotary drilling bucket 3. The mast unit 2 is detachably connected to the support unit 1, and the rotary drilling bucket 3 is connected to the bottom of the mast unit 2 through a transmission structure.

[0023] This invention, by setting an impact hammer 3211, dredging teeth 3212, and cutting components 322 on the plate 321 of the rotary drilling disc 32, and cooperating with millimeter-wave radar to detect boulders, can quickly activate the impact function when encountering boulders, greatly improving rock cutting efficiency and reducing construction time. The hydraulic system of the impact hammer 3211 and dredging teeth 3212 is reasonably designed, with the setting of return oil pipe 32111, oil outlet pipe 32122, oil injection pipe, etc., and with the cooperation of one-way valve, solenoid valve, and pressure sensor, can achieve precise hydraulic control, avoid equipment damage due to excessive force, and extend the service life of the equipment. The support structure 113 of the bearing unit 1 is composed of a main support plate 1131, support rod 1132, triangular connecting plate 1133, etc. The support angle and force can be adjusted by adjusting the hydraulic rod 1135 and the tilting hydraulic rod 1136, which improves the stability of the device in complex terrain and ensures construction accuracy and safety.

[0024] According to the appendix Figures 1-8 As shown, the rotary drilling bucket 3 is the core component for achieving efficient rock cutting, and it includes a bucket body 31, a rotary drilling disc 32, and a clamping component 33. The rotary drilling disc 32 is rotatably connected to the bottom of the bucket body 31 via a rotating assembly 323. Its main body is a plate 321, and the inner side of the plate 321 is equipped with an impact hammer 3211 and dredging teeth 3212 using a modular plug-in structure. The two are alternately distributed to ensure uniform force during construction.

[0025] According to the appendix Figures 1-9As shown, furthermore, the impact hammer 3211 is connected to the cylinder of the dredging tooth 3212 via a return oil pipe 32111. A one-way valve is installed on the return oil pipe 32111 to direct the return oil generated by the impact hammer 3211 to the dredging tooth 3212, thus achieving hydraulic oil recycling. An oil outlet pipe 32122 is connected to the outside of the cylinder of the dredging tooth 3212. The other end of the oil outlet pipe 32122 is connected to an oil tank 3214, and a solenoid valve is connected in series on the pipe. This solenoid valve is electrically connected to a pressure sensor located inside the cylinder of the dredging tooth 3212, forming a pressure feedback regulation system. When the dredging tooth 3212 comes into contact with a hard object, causing the pressure inside the cylinder to exceed a threshold, the solenoid valve automatically opens to relieve pressure, preventing overload damage to the components.

[0026] According to the appendix Figures 1-9 As shown, the oil tank 3214 is connected to the impact hammer 3211 via two pipelines: one is the second oil injection pipe 32142, which is used to inject oil into the cylinder of the impact hammer 3211 to drive the output rod 32112 to extend; the other is the first oil injection pipe 32141, which is used to inject high-pressure oil to retract and reset the output rod 32112. Both pipelines are equipped with one-way valves to prevent oil backflow.

[0027] According to the appendix Figures 1-3 As shown, the load-bearing unit 1, serving as the foundation for the movement and support of the device, includes a tracked vehicle 11 and a winch 12. The tracked vehicle 11 has a positioning anchor point 111 and a connecting anchor point 112 welded to its top. A support structure 113, consisting of a main support plate 1131, a support rod 1132, and a triangular connecting plate 1133, is inserted into the connecting anchor point 112. The inner side of the triangular connecting plate 1133 is hinged to the main support plate 1131 and the support rod 1132 via two sets of insert rods 1134. Adjusting hydraulic rods 1135 and tilting hydraulic rods 1136 are respectively sleeved on the outer side of the insert rods 1134. Through the coordinated adjustment of the two hydraulic rods, stepless adjustment of the support angle and height can be achieved to adapt to the support requirements of different terrains. A cable 121 wound around the winch 12 is used to assist in the lifting and lowering of the drill rod 222.

[0028] According to the appendix Figures 1-4 As shown, it is particularly important to emphasize that the mast unit 2 includes a main mast 21 and a pipe-rolling power head 22. The main mast 21 has sliding guide rails 211 bolted to both sides, a positioning block 212 welded to the front, and a pulley 2131 mounted on the top via a flag plate 213. The rear side, from top to bottom, is equipped with a back wheel 214, an adjusting anchor point 215, and a fixed anchor point 216. The pipe-rolling power head 22 is engaged with the sliding guide rails 211 via a slider. The lifting hydraulic rod 221 connected to its top is hinged to the bottom of the positioning block 212, enabling stable lifting and lowering of the pipe-rolling power head 22. The drill rod 222 inserted inside is connected to a cable 121 at its top. The cable 121 is wound around the back wheel 214 and the pulley 2131 in sequence, forming a multi-point support structure.

[0029] According to the appendix Figures 1-5 As shown, it is particularly important to emphasize that the plug 2221 inserted into the inner side of the drill rod 222 is sleeved with a spring 2222 on the outer side, and the bottom is connected to the rotating shaft 2224 through the connector 2223. The clamping block 2225 on the outer side of the rotating shaft 2224 cooperates with the sliding sleeve 2226 to realize the quick assembly and disassembly of the counter-rotating bucket 3 clamping component 33 and stable transmission.

[0030] According to the appendix Figures 1-6 As shown, it is particularly important to emphasize that the positioning sleeve 311 welded to the outside of the bucket body 31 is internally connected to the shaft 312, which cooperates with the rotating assembly 323 on the top of the rotary drilling disc 32 to achieve rotational transmission. A millimeter-wave radar is embedded inside the plate body 321 for precise detection of isolated boulders. The serrated structure of the bottom arc-shaped cutting component 322 works in conjunction with the impact hammer 3211 to form a composite crushing mechanism of "impact + cutting". The mud inlet 3213 on the plate body 321 can quickly collect excavated soil, and the top sealing shell 324 protects the hydraulic components.

[0031] Working principle: The tracked vehicle 11 of the load-bearing unit 1 provides the power for the entire machine's movement. After reaching the construction position, the support structure 113 achieves rigid support by adjusting the extension and retraction of the hydraulic rods 1135 and 1136, evenly transferring the load of the entire machine to the ground. In the mast unit 2, the winch 12, through a multi-point transmission structure consisting of a cable 121, a back wheel 214, and a pulley 2131, works in conjunction with the lifting hydraulic rod 221 on top of the drill pipe power head 22 to achieve precise lifting and positioning of the drill pipe 222. The drill pipe power head 22 outputs rotational torque, which is transmitted to the rotary bucket 3 via the drill pipe 222, driving the rotary digging disc 32 to rotate at a set speed, forming continuous digging power. The rotary drilling rig 32, as the core operating component, integrates active detection and combined crushing functions: Detection trigger: The millimeter-wave radar inside plate 321 scans the working face in real time. When a boulder is detected, the breaking mode is triggered. Collaborative crushing: The impact hammer 3211 obtains high-pressure oil through the second oil injection pipe 32142, and the output rod 32112 impacts the boulder at high frequency. At the same time, the arc-shaped cutting part 322 rotates with the rotary digging disc 32, and the saw teeth form a circular cutting trajectory. The two form a composite crushing mechanism of "point impact + line cutting". Pressure feedback: When the dredging tooth 3212 contacts a boulder, the toothed rod 32121 contracts, causing the pressure inside the cylinder to rise sharply. When the pressure sensor detects that the value reaches the threshold, the solenoid valve opens immediately, and the oil flows back to the oil tank 3214 through the oil outlet pipe 32122 to relieve pressure and prevent the toothed rod 32121 from breaking due to overload. The device adopts a closed-loop hydraulic system to achieve efficient energy utilization: During the reset phase of the impact hammer 3211, high-pressure oil is injected into the first oil injection pipe 32141 to push the output rod 32112 to retract. The resulting return oil is transported unidirectionally to the dredging tooth 3212 cylinder through the return oil pipe 32111, providing power for the extension of the tooth rod 32121 and reducing the oil supply load of the oil tank 3214. The oil tank 3214, as the hydraulic hub, controls the extension and retraction of the impact hammer 3211 through the dual oil injection pipes. The check valve ensures the directional flow of oil, avoids pipeline pressure interference, and keeps the system pressure stable within the set range.

[0032] The dual hydraulic rods of the support structure 113 achieve overall machine leveling compensation through differential speed adjustment, cooperating with the adjusting anchor point 215 and fixed anchor point 216 on the rear side of the main rod 21. The connection between the drill rod 222 and the rotary drilling bucket 3 adopts a spring 2222 buffer structure. When encountering a sudden impact, the spring 2222 can absorb the impact force, prevent the drill rod 222 from bending and deforming, and ensure that the hole remains vertical.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A rotary drilling device for pile foundations capable of efficiently cutting rock, comprising a bearing unit (1), a mast unit (2), and a rotary drilling bucket (3), wherein the mast unit (2) is connected to the bearing unit (1), and the rotary drilling bucket (3) is connected to the bottom of the mast unit (2), characterized in that, The rotary drilling bucket (3) includes a bucket body (31), a rotary drilling disc (32), and a clamping member (33). The rotary drilling disc (32) is provided with a plate (321). An impact hammer (3211) and dredging teeth (3212) are inserted into the inner side of the plate (321). An oil return pipe (32111) is connected to the outer side of the impact hammer (3211). The oil return pipe (32111) is connected to the outer side of the dredging teeth (3212) for returning oil to the dredging teeth (3212). A one-way valve is provided on the oil return pipe (32111). The dredging teeth (3212) An oil outlet pipe (32122) is connected to the outside of the oil cylinder. The other end of the oil outlet pipe (32122) is connected to an oil tank (3214). An electromagnetic valve is installed on the oil outlet pipe (32122). The electromagnetic valve is electrically connected to a pressure sensor. The pressure sensor is installed inside the oil cylinder of the dredging tooth (3212). A second oil injection pipe (32142) is connected to the outside of the oil tank (3214). The second oil injection pipe (32142) is used to inject oil into the oil cylinder of the impact hammer (3211). A one-way valve is installed on the second oil injection pipe (32142).

2. The rotary drilling device for pile foundations capable of efficiently cutting rock according to claim 1, characterized in that, The bearing unit (1) includes a tracked vehicle (11) and a winch (12). The tracked vehicle (11) is connected to a positioning anchor point (111) and a connecting anchor point (112) on its top. The positioning anchor point (111) and the connecting anchor point (112) are connected to a support structure (113). The support structure (113) includes a main support plate (1131), a support rod (1132) and a triangular connecting plate (1133). The main support plate (1131) and the support rod (1132) are inserted into the connecting anchor point (112).

3. The rotary drilling device for pile foundations capable of efficiently cutting rock according to claim 2, characterized in that, The triangular connecting plate (1133) has a rod (1134) inserted into its inner side. There are two sets of rods (1134), which are inserted into the inner side of the main support plate (1131) and the support rod (1132), respectively. One set of rods (1134) has an adjusting hydraulic rod (1135) sleeved on its outer side, and the other set of rods (1134) has an inclined hydraulic rod (1136) sleeved on its outer side. The winch (12) has a cable (121) wound around it.

4. The rotary drilling device for pile foundations capable of efficiently cutting rock according to claim 3, characterized in that, The mast unit (2) includes a main mast (21) and a tube-rubbing power head (22). The main mast (21) is connected to sliding guide rails (211) on both sides. The main mast (21) is connected to a positioning block (212) on the front side. The main mast (21) is connected to a flag plate (213) on the top. The flag plate (213) is inserted into a pulley (2131) on the inner side. The main mast (21) is connected to a back wheel (214), an adjusting anchor point (215), and a fixed anchor point (216) from top to bottom on the rear side.

5. A rotary drilling device for pile foundations capable of efficiently cutting rock according to claim 4, characterized in that, The tube-rubbing power head (22) is snapped onto the outside of the main rod (21) and is snapped onto the sliding guide rail (211). The top of the tube-rubbing power head (22) is connected to a lifting hydraulic rod (221), which is connected to the bottom of the positioning block (212). A drill rod (222) is inserted into the inside of the tube-rubbing power head (22). A cable (121) is connected to the top of the drill rod (222). The cable (121) is wrapped around the inside of the back wheel (214) and around the top of the pulley (2131).

6. The rotary drilling device for pile foundations capable of efficiently cutting rock according to claim 5, characterized in that, A connector (2221) is inserted into the inner side of the drill rod (222), a spring (2222) is sleeved on the outer side of the connector (2221), a connector (2223) is connected to the bottom of the connector (2221), a rotating shaft (2224) is inserted into the connector (2223), a clamping block (2225) is sleeved on the outer side of the rotating shaft (2224), and a sliding sleeve (2226) is sleeved on the outer side of the clamping block (2225).

7. The rotary drilling device for pile foundations capable of efficiently cutting rock according to claim 1, characterized in that, The bucket body (31) is connected to a positioning sleeve (311) on the outside, and a shaft (312) is inserted into the inside of the positioning sleeve (311); a millimeter-wave radar is installed on the inside of the plate body (321) for detecting boulders, and a mud inlet (3213) is opened on the plate body (321); a toothed rod (32121) is inserted into the inside of the mud digging tooth (3212); an output rod (32112) is inserted into the inside of the impact hammer (3211); a first oil injection pipe (32141) is connected to the outside of the oil tank (3214), and the first oil injection pipe (32141) is connected to the outside of the impact hammer (3211) for injecting oil into the oil cylinder of the impact hammer (3211) to retract the output rod (32112).

8. A rotary drilling device for pile foundations capable of efficiently cutting rock according to claim 7, characterized in that, The bottom of the plate (321) is connected to a cutting component (322), which is an arc-shaped plate. The bottom of the cutting component (322) is provided with saw teeth for cutting boulders. The top of the plate (321) is connected to a rotating assembly (323), which is sleeved on the outside of the shaft (312). The top of the plate (321) is connected to a sealing shell (324), which is used to sleeve the impact hammer (3211), the dredging teeth (3212), and the oil tank (3214).

9. A rotary drilling device for pile foundations capable of efficiently cutting rock according to claim 6, characterized in that, The rotary drilling disc (32) is connected to the bottom of the bucket body (31), and the clamping member (33) is connected to the top of the bucket body (31). The clamping member (33) is clamped by the clamping block (2225) and inserted into the inner side of the sliding sleeve (2226).

10. A method of using a rotary drilling device for pile foundations capable of efficiently cutting rock according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Drive the tracked vehicle (11) to the construction position, adjust the adjusting hydraulic rod (1135) and tilting hydraulic rod (1136) of the support structure (113) so that the main support plate (1131) and support rod (1132) are firmly supported on the ground; S2: Start the winch (12) and the pipe-rolling power head (22), and adjust the height and position of the drill rod (222) through the cable (121) and the lifting hydraulic rod (221) so that the rotary drilling bucket (3) reaches the designated construction position; S3: The drill rod (222) drives the rotary bucket (3) to rotate. The digging teeth (3212) on the rotary disc (32) dig through the tooth rod (32121). The slag enters the bucket body (31) through the mud inlet (3213). S4: When the millimeter-wave radar detects a boulder, the oil tank (3214) injects oil into the cylinder of the impact hammer (3211) through the second oil injection pipe (32142). The output rod (32112) of the impact hammer (3211) extends out to impact the boulder, and at the same time, the saw teeth of the cutting part (322) cut the boulder. S5: When the dredging tooth (3212) is working, when the dredging tooth (3212) encounters a boulder, the tooth rod (32121) retracts inward. The pressure sensor monitors the pressure inside the cylinder. When the set value is reached, the solenoid valve opens, and the oil flows back to the oil tank (3214) through the oil outlet pipe (32122). At this time, the pressure inside the oil tank (3214) increases, forcing the impact hammer (3211) to start. When the output pipe of the impact hammer (3211) retracts, it generates return oil. The return oil flows through the return oil pipe (32111) to the cylinder of the dredging tooth (3212), causing the tooth rod (32121) to extend again for reset. S6: When the amount of slag in the bucket (31) reaches a certain amount, lift the rotary excavator bucket (3) and discharge the slag. Repeat steps S3-S5 until the construction is completed.

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