Forward and reverse drilling and reaming branch pile machine and its internal circulation hole cleaning construction method

Abstract

The application discloses a positive and reverse drilling rotary expanding branch disc pile machine and an inner circulation hole cleaning construction method thereof, belongs to the forming technical field of the cast branch disc pile, and comprises a rack, a hydraulic column and a mud pump, an inner pipe is arranged in the hydraulic column and fixed, a liquid inlet of the mud pump is communicated with one end of the inner pipe, an outer pipe is arranged in the bottom of the perforator, a drill bit is fixedly arranged on the outer pipe, a mud channel is arranged in the drill bit, and the mud channel is communicated with the outer pipe. The application has the effects of improving the work efficiency and saving the construction period.

Description

Technical Field

[0001] This application relates to the field of cast-in-place pile forming technology, and in particular to forward and reverse drilling rotary expansion pile machine and its internal circulation hole cleaning construction method. Background Technology

[0002] Supported piles are a new type of pile foundation technology. By expanding the soil layer in a suitable soil layer, ordinary friction piles or friction end bearing piles in relatively weak soil layers can increase the bearing capacity of the pile end by setting a bearing plate or bearing branch within a limited soil layer of the pile body. This can reduce the pile diameter and pile length, thereby increasing the bearing capacity of a single cubic meter of concrete, saving costs or shortening the construction period.

[0003] In the prior art, the pile driver includes a hydraulic column and a frame; the top of the hydraulic column is driven by a hydraulic device, and the hydraulic column passes through and slides on the frame; the side wall of the frame has a through hole, the bottom end of the hydraulic column is hinged to two upper rotating expansion arms, the bottom end of the through hole is hinged to two lower rotating expansion arms, and the two upper rotating expansion arms and the two lower rotating expansion arms are correspondingly hinged; and the upper rotating expansion arms and the lower rotating expansion arms can pass through the through hole.

[0004] Regarding the aforementioned technologies, the inventors believe that traditional bearing piles consist of several steps: workers first operate a drilling rig to drill a hole, then remove the drilling rig, expand the bearing plate using a bearing machine, then use a crane to lift the drilling rig for secondary hole cleaning, and finally place the reinforcing cage and pour concrete to form the pile. Workers follow these steps sequentially, which may result in low construction efficiency and a long construction period. Summary of the Invention

[0005] In order to improve work efficiency and save construction time, this application provides a forward and reverse drilling rotary expansion pile driver and its internal circulation hole cleaning construction method.

[0006] The forward and reverse drilling rotary expansion pile driver provided in this application adopts the following technical solution:

[0007] The forward and reverse drilling and rotary expansion pile driver includes a frame, a borehole opened inside the frame, a hydraulic column, and a mud pump. An inner tube is fixed inside the hydraulic column, and the inlet of the mud pump is connected to one end of the inner tube. An outer tube is inserted through the bottom of the borehole, and a drill bit is fixedly installed on the outer tube. A mud channel is opened inside the drill bit, and the mud channel is connected to the outer tube.

[0008] By adopting the above technical solution, workers can first drive the frame to rotate forward, which in turn drives the drill bit to rotate, enabling drilling. Then, water is introduced through the inner pipe, flowing through the outer pipe into the soil and diluting it into mud. The mud pump's inlet is then connected to one end of the inner pipe to remove all the mud from the hole. Finally, the frame is driven to rotate in reverse, and the hydraulic system is activated to drive the hydraulic column for pile foundation work. This improves overall work efficiency and saves time.

[0009] Preferably, the outer tube has a through hole on its side wall, a sliding plate slides in the inner cavity of the outer tube, and a plug block is fixedly installed on the sliding plate. The plug block can be inserted into the through hole. The inner cavity of the outer tube is also provided with a drive assembly for driving the sliding plate to move.

[0010] By adopting the above technical solution, the through hole can increase the speed of water diluting the soil, thereby further improving work efficiency. During the drilling process, the plug block is inserted into the through hole, thereby reducing the possibility of soil in the hole entering the outer pipe and thus reducing the possibility of the outer pipe being blocked. When it is necessary to dilute the soil, the sliding plate can be driven by the drive component to move away from the through hole. The movement of the sliding plate drives the plug block to move. After the plug block moves to a position away from the through hole, it is easy for water to flow out from the through hole.

[0011] Preferably, the drive assembly includes a waterwheel and a lead screw, a connecting frame is fixedly provided on the inner wall of the outer tube, the waterwheel shaft is rotatably disposed on the inner wall of the connecting frame, a rotating rod is rotatably disposed on the inner wall of the connecting frame, and a connecting assembly for connecting the rotating rod is provided on the waterwheel shaft.

[0012] The lead screw is rotatably mounted on the inner wall of the outer tube. A slider is threaded onto the lead screw, and a connecting rod is movably connected to the slider. The end of the connecting rod away from the slider is movably connected to the slide plate. A first gear is fixedly mounted on the rotating rod, and a second gear is fixedly mounted on the lead screw. The first gear and the second gear mesh with each other.

[0013] By adopting the above technical solution, when the staff introduces water, the water flow inside the outer pipe will first drive the waterwheel to rotate. The waterwheel's shaft is connected to the rotating rod through a connecting component. During the rotation of the waterwheel, the rotating rod can drive the rotating rod to rotate. The rotating rod drives the first gear to rotate, the first gear drives the second gear to rotate, the second gear drives the lead screw to rotate, the lead screw drives the slider to move in the vertical direction, the slider's movement drives the connecting rod to rotate, the connecting rod's rotation can drive the sliding plate to move, and the sliding plate's movement drives the insertion block to move, thereby reducing the difficulty of moving the insertion block.

[0014] Preferably, the rotating shaft on the waterwheel has a storage groove, and the connecting assembly is disposed in the storage groove. The connecting assembly includes a push block and a first spring. The push block slides in the storage groove, and the two ends of the first spring are respectively fixedly connected to the storage groove and the push block. The push block has an inclined surface, and the rotating rod has a slot for the rotating shaft on the waterwheel to be inserted. The inner wall of the slot has a limiting groove for the push block to be inserted.

[0015] By adopting the above technical solution, when water flows through the outer pipe, the water flow can drive the waterwheel to rotate, and the waterwheel's shaft can drive the push block to rotate. During this time, the push block is slidably connected to the inner wall of the slot, and the first spring is in a compressed state. When the waterwheel's shaft rotates to the position corresponding to the push block and the limiting groove, the elastic force of the first spring can push the push block to insert into the limiting groove. Afterwards, during the rotation of the waterwheel's shaft, the side wall of the push block can abut against the inner wall of the limiting groove and push the rotating rod to rotate, thereby reducing the difficulty of rotating the rod. When pumping out mud, the mud flows back, thereby driving the waterwheel to rotate in the opposite direction. At this time, the shaft on the waterwheel drives the push block to rotate, and the inclined surface on the push block can abut against the inner wall of the limiting groove and compress the first spring. Afterwards, the push block is always slidably connected to the inner wall of the slot, thus preventing the rotating rod from rotating in the opposite direction, thereby reducing the possibility of the screw rotating in the opposite direction. Therefore, the insertion block can always be kept away from the through hole, reducing the difficulty of mud entering the outer pipe from the through hole.

[0016] Preferably, a sealing cover is slidably provided at the opening of the mud channel, and a second driving component for driving the sealing cover to move is provided inside the outer tube.

[0017] By adopting the above technical solution, when drilling is carried out, the sealing cap is inserted into the opening of the mud channel, thereby reducing the possibility of soil entering the outer pipe; when water is needed for dilution, the sealing cap can be driven to move away from the opening of the mud channel by the second drive component, thereby facilitating the outflow of water.

[0018] Preferably, a fixing plate is fixedly provided on the inner wall of the outer tube, and the second drive assembly includes a threaded rod, one end of which is fixedly provided on one end of the lead screw, the threaded rod is rotatably provided on the fixing plate, and the threaded rod is threadedly engaged with the sealing cover.

[0019] By adopting the above technical solution, the lead screw can drive the threaded rod to rotate during the rotation process, and the rotation of the threaded rod can drive the sealing cover to move, thereby reducing the difficulty of moving the sealing cover.

[0020] Preferably, a first sleeve is fixedly installed on the slide plate, and a first guide rod is fixedly installed on the inner wall of the outer tube, with the first guide rod sliding on the first sleeve.

[0021] By adopting the above technical solution, when the skateboard moves, the first guide rod can slide within the first sleeve, thereby guiding the skateboard and reducing the difficulty of moving the skateboard.

[0022] Preferably, a second sleeve is fixedly provided on the sealing cover, and a second guide rod is fixedly provided on the fixing plate, the second guide rod sliding inside the second sleeve.

[0023] By adopting the above technical solution, the second guide rod can slide inside the second sleeve, thereby guiding the sealing cover and reducing the difficulty of moving the sealing cover.

[0024] Preferably, a motor is installed on the side wall of the outer tube, a connecting rod is rotatably arranged inside the connecting frame, one end of the connecting rod is fixedly arranged on the rotating shaft of the motor, and a third gear is fixedly arranged on the connecting rod, the third gear meshing with the second gear.

[0025] By adopting the above technical solution, when workers need to re-block the openings of the through hole and the mud channel, the motor can be turned on. When the motor rotates, it can drive the connecting rod to rotate. The rotation of the connecting rod drives the third gear to rotate. The rotation of the third gear drives the second gear to rotate. The rotation of the second gear drives the lead screw to rotate in the opposite direction, thereby driving the slide plate to move closer to the through hole and simultaneously driving the sealing cover to move closer to the opening of the mud channel, thus re-blocking the openings of the through hole and the mud channel.

[0026] The internal circulation hole cleaning method for forward and reverse drilling rotary expansion pile drivers includes the following construction steps:

[0027] S1. Drilling: Drive the entire frame to rotate forward, and the rotation of the frame drives the drill bit to perform drilling work;

[0028] S2. Hole cleaning: After the hole is formed, water is pumped into the inner tube to dilute the soil in the hole and form mud. Then, the mud pump is connected to one end of the inner tube to extract the diluted mud, thereby completing the hole cleaning.

[0029] S3, Spreading Support: Drives the entire frame to rotate in reverse, and drives the upper and lower spreading arms through the hydraulic device to perform the spreading support operation;

[0030] S4. Pile casting: A steel cage is placed inside the hole, and concrete is poured into the hole to form a pile.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. The operator can first drive the frame to rotate forward, which in turn drives the drill bit to rotate, allowing the drill bit to perform drilling. Then, water can be introduced through the inner pipe, flowing through the outer pipe into the soil and diluting it into mud. Next, the mud pump's inlet is connected to one end of the inner pipe to remove all the mud from the hole. Finally, the frame is driven to rotate in reverse, and the hydraulic system is activated to drive the hydraulic column for pile foundation work. This improves overall work efficiency and saves time.

[0033] 2. The through hole can increase the speed at which water dilutes the soil, thereby further improving work efficiency; during the drilling process, the plug block is inserted into the through hole, thereby reducing the possibility of soil in the hole entering the outer pipe, thus reducing the possibility of the outer pipe being blocked. Afterwards, when soil dilution is required, the sliding plate can be driven by the drive component to move away from the through hole. The movement of the sliding plate drives the plug block to move. After the plug block moves to a position away from the through hole, it facilitates the flow of water out of the through hole.

[0034] 3. When the staff introduces water, the water flows inside the outer pipe, which first drives the waterwheel to rotate. The waterwheel's shaft is connected to the rotating rod through a connecting assembly. As the waterwheel rotates, it drives the rotating rod to rotate. The rotating rod then drives the first gear to rotate, which in turn drives the second gear to rotate. The second gear then drives the lead screw to rotate, which in turn drives the slider to move vertically. The slider's movement drives the connecting rod to rotate, which in turn drives the sliding plate to move. The sliding plate's movement then drives the insertion block to move, thus reducing the difficulty of moving the insertion block. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the forward and reverse drilling rotary expansion pile driver;

[0036] Figure 2 This is a schematic diagram of the structure of the skateboard highlighted in the embodiments of this application;

[0037] Figure 3 This is a schematic diagram of the structure of the rotating rod in the embodiments of this application;

[0038] Figure 4 This is a schematic diagram of the structure of the push block in the embodiment of this application;

[0039] Figure 5 yes Figure 2 Enlarged view of point A in the middle;

[0040] Figure 6 yes Figure 2 Enlarged view of point B in the middle.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Frame; 2. Mud pump; 3. Inner pipe; 4. Outer pipe; 5. Drill bit; 6. Mud channel; 7. Through hole; 8. Slide plate; 9. Insert block; 10. First drive assembly; 11. Waterwheel; 12. Lead screw; 13. Connecting frame; 14. Connecting assembly; 15. Slider; 16. Connecting rod; 17. First gear; 18. Second gear; 19. Storage tank; 20. Push block; 21. First spring; 22. Slot; 23. Limiting slot; 24. Sealing cover; 25. Second drive assembly; 26. Fixing plate; 27. Threaded rod; 28. First sleeve; 29. ​​First guide rod; 30. Second sleeve; 31. Second guide rod; 32. Motor; 33. Connecting rod; 34. Third gear; 35. Hydraulic column; 36. Through hole; 37. Rotating rod. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0044] This application discloses a forward and reverse drilling rotary expansion pile driver. For example... Figure 1 and Figure 2 As shown, the forward and reverse drilling rotary expansion pile driver includes a frame 1, a perforation 36 opened inside the frame 1, a hydraulic column 35, and a mud pump 2. An inner tube 3 is fixedly installed inside the hydraulic column 35 along its axial direction. The inlet of the mud pump 2 is connected to the top of the inner tube 3. An outer tube 4 is installed at the bottom of the perforation 36. The outer tube 4 extends along the axial direction of the frame 1. A drill bit 5 is welded and fixed at the bottom of the outer tube 4. A mud channel 6 is opened inside the drill bit 5. The mud channel 6 extends vertically and is connected to the outer tube 4.

[0045] like Figure 1 and Figure 2 As shown, the operator can first drive the frame 1 to rotate forward, which in turn drives the drill bit 5 to rotate, allowing the drill bit 5 to perform drilling. Then, the operator can introduce water through the inner pipe 3, which flows through the outer pipe 4 into the soil and dilutes the soil into mud. Next, the inlet of the mud pump 2 is connected to one end of the inner pipe 3 to extract all the mud from the hole. Finally, the operator drives the frame 1 to rotate in reverse and activates the hydraulic device to drive the hydraulic column 35 to perform the pile foundation work. This improves the overall work efficiency and saves time.

[0046] like Figure 1 and Figure 2As shown, the outer tube 4 has multiple through holes 7 symmetrically opened along its axis on its side wall. The multiple through holes 7 are arranged sequentially along the axial direction of the outer tube 4. The inner cavity of the outer tube 4 has two sliding plates 8 that slide towards each other or backward along its radial direction. The sliding plates 8 are cuboid in shape. The two sliding plates 8 are arranged corresponding to the through holes 7 on both sides. Multiple plug-in blocks 9 are welded and fixed on the side of the sliding plate 8 near the through holes 7. The multiple plug-in blocks 9 are plugged into the multiple through holes 7 one by one. The inner cavity of the outer tube 4 is also provided with a first driving component 10 for driving the sliding plates 8 to move.

[0047] like Figure 3 and Figure 4 As shown, combined with Figure 2 The first drive assembly 10 includes a waterwheel 11 and a lead screw 12. A connecting frame 13 is welded and fixed on the inner wall of the outer pipe 4. The connecting frame 13 is located above the slide plate 8. One end of the waterwheel 11 shaft is rotatably connected to one side of the inner wall of the connecting frame 13. A rotating rod 37 is rotatably connected to the opposite side of the inner wall of the connecting frame 13. The rotating rod 37 is horizontally arranged. A connecting assembly 14 for connecting the rotating rod 37 is provided on the waterwheel 11 shaft.

[0048] like Figure 3 and Figure 4 As shown, combined with Figure 2 The lead screw 12 is vertically arranged along the axial direction of the outer tube 4. The top end of the lead screw 12 passes through the bottom side wall of the connecting frame 13 and extends into the interior of the connecting frame 13. A slider 15 is threaded onto the lead screw 12. The slider 15 is rectangular. Connecting rods 16 are hinged to the opposite sides of the slider 15. The two connecting rods 16 are hinged to the two sliding plates 8 respectively. A first gear 17 is sleeved and fixed on the rotating rod 37. A second gear 18 is sleeved and fixed on the top end of the lead screw 12. The second gear 18 is a crown gear. The first gear 17 and the second gear 18 mesh.

[0049] like Figure 2 As shown, the through hole 7 can increase the speed at which water dilutes the soil, thereby further improving work efficiency; during the drilling process, the plug block 9 is plugged into the through hole 7, thereby reducing the possibility of soil in the hole entering the outer pipe 4, thus reducing the possibility of the outer pipe 4 being blocked.

[0050] like Figure 3 and Figure 4 As shown, combined with Figure 2Then, when it is necessary to dilute the soil, the staff introduces water into the outer pipe 4. When the water flows in the outer pipe 4, it first drives the waterwheel 11 to rotate. The rotating shaft of the waterwheel 11 is connected to the rotating rod 37 through the connecting component 14. During the rotation of the waterwheel 11, it can drive the rotating rod 37 to rotate. The rotation of the rotating rod 37 drives the first gear 17 to rotate. The rotation of the first gear 17 drives the second gear 18 to rotate. The rotation of the second gear 18 drives the lead screw 12 to rotate. The rotation of the lead screw 12 drives the slider 15 to move in the vertical direction. The movement of the slider 15 drives the connecting rod 16 to rotate. The rotation of the connecting rod 16 can drive the slide plate 8 to move. The movement of the slide plate 8 drives the insertion block 9 to move, thereby reducing the difficulty of moving the insertion block 9. Then, when the insertion block 9 moves to a position away from the through hole 7, it is easier for the water to flow out from the through hole 7.

[0051] like Figure 3 and Figure 4 As shown, two storage slots 19 are provided on the side wall of the waterwheel 11 shaft near the rotating rod 37. The storage slots 19 extend radially along the waterwheel 11 shaft. Two sets of connecting components 14 are provided and are respectively located in the two storage slots 19. The connecting components 14 include a push block 20 and a first spring 21. The push block 20 is cuboid in shape and slides radially along the waterwheel 11 shaft in the storage slot 19. The first spring 21 is arranged radially along the waterwheel 11 shaft, and the two ends of the first spring 21 are welded and fixed to the storage slot 19 and the push block 20 respectively. The push block 20 is provided with an inclined surface. The rotating rod 37 near the waterwheel 11 has a slot 22 for the rotating shaft of the waterwheel 11 to be inserted. The slot 22 is arranged axially along the rotating rod 37. The inner wall of the slot 22 has two limiting slots 23 for the push block 20 to be inserted.

[0052] like Figure 3 and Figure 4 As shown, combined with Figure 2When water flows through the outer pipe 4, the water flow drives the waterwheel 11 to rotate. The rotating shaft of the waterwheel 11 drives the push block 20 to rotate. During this time, the push block 20 is slidably connected to the inner wall of the slot 22, and the first spring 21 is in a compressed state. When the rotating shaft of the waterwheel 11 rotates to the position corresponding to the push block 20 and the limiting groove 23, the elastic force of the first spring 21 can push the push block 20 to insert into the limiting groove 23. Afterwards, during the rotation of the waterwheel 11, the side wall of the push block 20 can abut against the inner wall of the limiting groove 23 and push the rotating rod 37 to rotate, thereby lowering the rotating rod 37. 7. Difficulty of rotation: When the mud is extracted, the mud flows back, which can drive the waterwheel 11 to rotate in the opposite direction. At this time, the rotating shaft on the waterwheel 11 drives the push block 20 to rotate. The inclined surface on the push block 20 can abut against the inner wall of the limiting groove 23 and compress the first spring 21. After that, the push block 20 is always slidably connected to the inner wall of the slot 22, so it cannot drive the rotating rod 37 to rotate in the opposite direction, thereby reducing the possibility of the screw 12 rotating in the opposite direction. Therefore, the plug block 9 can always be kept in a position away from the through hole 7, reducing the difficulty of mud entering the outer tube 4 from the through hole 7.

[0053] like Figure 2 As shown, a sealing cover 24 is slidably installed at the opening of the mud channel 6 in the vertical direction, and a second drive assembly 25 for driving the sealing cover 24 to move is provided inside the outer tube 4. When drilling is performed, the sealing cover 24 is inserted into the opening of the mud channel 6, thereby reducing the possibility of mud entering the outer tube 4. Afterwards, when water is needed for dilution, the sealing cover 24 can be driven to move away from the opening of the mud channel 6 by the second drive assembly 25, thereby facilitating the outflow of water.

[0054] like Figure 2 As shown, a fixing plate 26 is welded and fixed to the inner wall of the outer tube 4. The second drive assembly 25 includes a threaded rod 27, which is vertically arranged. The top end of the threaded rod 27 is welded and fixed to the bottom end of the lead screw 12. The threaded rod 27 passes through and is rotatably connected to the fixing plate 26. The sealing cover 24 has a threaded groove, and the threaded rod 27 is threadedly engaged with the sealing cover 24 through the threaded groove. During the rotation of the lead screw 12, the threaded rod 27 can be driven to rotate, and the rotation of the threaded rod 27 can drive the sealing cover 24 to move, thereby reducing the difficulty of moving the sealing cover 24.

[0055] like Figure 2 and Figure 5As shown, the upper and lower ends of the slide plate 8 near the through hole 7 are welded and fixed with first sleeves 28. The first sleeves 28 are set horizontally along the radial direction of the outer tube 4. Two first guide rods 29 are welded and fixed to the inner wall of the outer tube 4. The two first guide rods 29 are set horizontally along the radial direction of the outer tube 4. The two first guide rods 29 slide in the two first sleeves 28 respectively. When the slide plate 8 moves, the first guide rods 29 can slide in the first sleeves 28, thereby guiding the slide plate 8 and reducing the difficulty of moving the slide plate 8.

[0056] like Figure 2 and Figure 6 As shown, a second sleeve 30 is welded and fixed to the sealing cover 24. The second sleeve 30 is vertically arranged. A second guide rod 31 is welded and fixed to the bottom of the fixing plate 26. The second guide rod 31 is vertically arranged and slides in the second sleeve 30 in the vertical direction. The second guide rod 31 can slide in the second sleeve 30, thereby guiding the sealing cover 24 and reducing the difficulty of moving the sealing cover 24.

[0057] like Figure 2 and Figure 3 As shown, a motor 32 is fixedly installed on the side wall of the outer tube 4 by bolts, and a protective cover for protecting the motor 32 is welded and fixed on the side wall of the outer tube 4. The rotating shaft on the motor 32 is horizontally arranged, and a connecting rod 33 is provided in the connecting frame 13. The connecting rod 33 is horizontally arranged, and one end of the connecting rod 33 passes through and is rotatably connected to the side wall of the outer tube 4. One end of the connecting rod 33 is welded and fixed to the rotating shaft on the motor 32. A third gear 34 is sleeved and fixed on the connecting rod 33, and the third gear 34 meshes with the second gear 18.

[0058] like Figure 2 and Figure 3 As shown, when the workers need to re-block the openings of the through hole 7 and the mud channel 6, the motor 32 can be turned on. When the motor 32 rotates, it can drive the connecting rod 33 to rotate. The rotation of the connecting rod 33 drives the third gear 34 to rotate. The rotation of the third gear 34 drives the second gear 18 to rotate. The rotation of the second gear 18 drives the lead screw 12 to rotate in the opposite direction, thereby driving the slide plate 8 to move closer to the through hole 7, and at the same time driving the sealing cover 24 to move closer to the opening of the mud channel 6, thereby re-blocking the openings of the through hole 7 and the mud channel 6.

[0059] The implementation principle of this application embodiment is as follows: The operator can first drive the frame 1 to rotate forward, and then the rotation of the frame 1 can drive the drill bit 5 to rotate, and the drill bit 5 can perform drilling work; then the operator can introduce water through the inner pipe 3, and the water can flow into the soil through the outer pipe 4, and dilute the soil into mud; then the inlet end of the mud pump 2 is connected to one end of the inner pipe 3 to extract all the mud in the hole; finally, the operator drives the frame 1 to rotate in reverse and turns on the hydraulic device to drive the hydraulic column 35 to perform the support pile work; thereby improving the overall work efficiency and saving construction time.

[0060] The internal circulation hole cleaning method for forward and reverse drilling rotary expansion pile drivers includes the following construction steps:

[0061] S1. Drilling: Drive the overall frame 1 to rotate forward, and the rotation of the frame 1 drives the drill bit 5 to perform drilling work.

[0062] S2. Hole cleaning: After the hole is formed, water is passed through the inner tube 3 to dilute the soil in the hole and form mud. Then, the mud pump 2 is connected to one end of the inner tube 3 to extract the diluted mud, thereby completing the hole cleaning.

[0063] S3, Spinning support plate: Drives the overall frame 1 to rotate in reverse, and drives the upper and lower spinning arms through the hydraulic device to perform the work of the spreading support plate;

[0064] S4. Pile casting: A steel cage is placed inside the hole, and concrete is poured into the hole to form a pile.

[0065] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A forward and reverse drilling and rotary expansion pile driver, characterized in that: The device includes a frame (1), a perforation (36) inside the frame (1), a hydraulic column (35), and a mud pump (2). An inner tube (3) is fixed inside the hydraulic column (35). The inlet of the mud pump (2) is connected to one end of the inner tube (3). An outer tube (4) is installed at the bottom of the perforation (36). A drill bit (5) is fixedly installed on the outer tube (4). A mud channel (6) is opened inside the drill bit (5). The mud channel (6) is connected to the outer tube (4). The outer tube (4) has a through hole (7) on its side wall, and a sliding plate (8) slides in the inner cavity of the outer tube (4). A plug-in block (9) is fixedly installed on the sliding plate (8), and the plug-in block (9) can be inserted into the through hole (7). The inner cavity of the outer tube (4) is also provided with a first driving component (10) for driving the sliding plate (8) to move. The first drive assembly (10) includes a waterwheel (11) and a lead screw (12). A connecting frame (13) is fixedly provided on the inner wall of the outer tube (4). The rotating shaft of the waterwheel (11) is rotatably provided on the inner wall of the connecting frame (13). A rotating rod (37) is rotatably provided on the inner wall of the connecting frame (13). A connecting assembly (14) for connecting the rotating rod (37) is provided on the rotating shaft of the waterwheel (11). The lead screw (12) is rotatably mounted on the inner wall of the outer tube (4). A slider (15) is threaded onto the lead screw (12). A connecting rod (16) is movably connected to the slider (15). The end of the connecting rod (16) away from the slider (15) is movably connected to the slide plate (8). A first gear (17) is fixedly mounted on the rotating rod (37). A second gear (18) is fixedly mounted on the lead screw (12). The first gear (17) and the second gear (18) mesh with each other.

2. The forward and reverse drilling rotary expansion pile driver according to claim 1, characterized in that: The waterwheel (11) has a storage groove (19) on its rotating shaft. The connecting assembly (14) is located in the storage groove (19). The connecting assembly (14) includes a push block (20) and a first spring (21). The push block (20) slides in the storage groove (19), and the two ends of the first spring (21) are fixedly connected to the storage groove (19) and the push block (20) respectively. The push block (20) has an inclined surface. The rotating rod (37) has a slot (22) for the rotating shaft of the waterwheel (11) to be inserted into. The inner wall of the slot (22) has a limiting groove (23) for the push block (20) to be inserted into.

3. The forward and reverse drilling rotary expansion pile driver according to claim 1, characterized in that: A sealing cap (24) is slidably provided at the opening of the mud channel (6), and a second driving component (25) for driving the sealing cap (24) to move is provided inside the outer tube (4).

4. The forward and reverse drilling rotary expansion pile driver according to claim 3, characterized in that: The inner wall of the outer tube (4) is fixedly provided with a fixing plate (26), and the second drive assembly (25) includes a threaded rod (27). One end of the threaded rod (27) is fixedly provided to one end of the lead screw (12), and the threaded rod (27) is rotatably provided on the fixing plate (26). The threaded rod (27) is threadedly engaged with the sealing cover (24).

5. The forward and reverse drilling rotary expansion pile driver according to claim 1, characterized in that: A first sleeve (28) is fixedly installed on the slide plate (8), and a first guide rod (29) is fixedly installed on the inner wall of the outer tube (4). The first guide rod (29) slides on the first sleeve (28).

6. The forward and reverse drilling rotary expansion pile driver according to claim 4, characterized in that: A second sleeve (30) is fixedly installed on the sealing cover (24), and a second guide rod (31) is fixedly installed on the fixing plate (26). The second guide rod (31) slides inside the second sleeve (30).

7. The forward and reverse drilling rotary expansion pile driver according to claim 1, characterized in that: A motor (32) is installed on the side wall of the outer tube (4). A connecting rod (33) is rotatably arranged inside the connecting frame (13). One end of the connecting rod (33) is fixedly arranged on the shaft of the motor (32). A third gear (34) is fixedly arranged on the connecting rod (33). The third gear (34) meshes with the second gear (18).

8. A method for internal circulation hole cleaning construction using a forward and reverse drilling and rotary expansion pile driver, based on the forward and reverse drilling and rotary expansion pile driver described in claim 1, characterized in that: The construction steps include the following: S1. Drilling: Drive the overall frame (1) to rotate forward. The rotation of the frame (1) drives the drill bit (5) to perform drilling work. S2. Hole cleaning: After the hole is formed, water is passed through the inner tube (3) to dilute the soil in the hole and form mud. Then, the mud pump (2) is connected to one end of the inner tube (3) to extract the diluted mud, thereby completing the hole cleaning. S3, Spinning support plate: Drive the overall frame (1) to reverse, and drive the upper and lower spinning arms through the hydraulic device to perform the work of the spreading support plate; S4. Pile casting: A steel cage is placed inside the hole, and concrete is poured into the hole to form a pile.

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