Rotary excavating square pile drilling tool

Abstract

The invention discloses a rotary excavating square pile drilling tool, and relates to the technical field of square pile drill bits, the rotary excavating square pile drilling tool comprises a box body, excavating wheels are symmetrically and rotatably connected to the two sides of the box body, a soil removing mechanism is rotatably connected to the side, located between the two excavating wheels on the same side, of the box body, and the soil removing mechanism abuts against the excavating wheels and is used for removing soil layers attached to the excavating wheels; the soil removing mechanism is used for removing a soil layer attached to the excavating wheel, a drill bit on the excavating wheel can make full contact with a to-be-excavated soil layer, the situation that the excavating capacity of the soil layer is reduced is avoided, the working procedures of drill lifting and cleaning are reduced, the working efficiency is improved, and the working efficiency is improved. And the arranged soil discharging mechanism discharges soil obtained after rotary excavating in time, the situation that the soil obtained after rotary excavating is accumulated in the square pile is avoided, the rotary excavating resistance of the drilling tool is increased, and meanwhile the situation that the excavating capacity is reduced due to the fact that the soil adheres to the excavating wheel again is avoided.

Description

Technical Field

[0001] This invention relates to the field of square pile drill bit technology, specifically a rotary drilling tool for square piles. Background Technology

[0002] Water conservancy projects (such as reservoirs, dams, sluices, pumping stations, dikes, wharves, etc.) are usually built under complex geological and hydrological conditions, which place extremely high demands on the bearing capacity, stability, impermeability and durability of the foundation.

[0003] Hydraulic engineering projects often encounter soft soil, silt, sand layers, pebble layers, and even soft rock strata. Square pile drilling rigs (such as rotary drilling rigs with square drill bits) can create square holes in various strata through specific drilling techniques, paving the way for subsequent concrete square pile casting. Compared to round piles, square piles have natural advantages in bearing horizontal loads, bending resistance, and shear resistance, with a larger lateral surface area and higher lateral friction. This is particularly advantageous for the foundations of hydraulic structures (such as wharves, sluice gates, and guide walls) that primarily resist horizontal forces such as water flow impact, earth pressure, and ship collisions. Compared to traditional driven square piles (precast square piles hammered into the ground), bored cast-in-place square piles have less construction vibration and noise, causing less disturbance to existing buildings or dikes, making them more suitable for urban water conservancy, renovation and expansion projects, or vibration-sensitive areas.

[0004] Square pile drills are mainly used for drilling square piles in foundation engineering projects such as water conservancy construction. They form pile holes by mechanically or hydraulically driving the drill bit to break rock strata or soil. Conventional processes include drilling and excavation, hole repair with a rectangular drill bit, and cleaning and slag removal. Chinese patent with publication number "CN114016899B" provides a hydraulic square pile drill bit. This application drives the excavating wheel to rotate through an independent hydraulic system, thereby achieving cutting and pile driving. It no longer needs to obtain mechanical rotation power from the rotary drilling rig. The high-pressure oil input required by its hydraulic system is obtained by diverting hydraulic oil from the hydraulic system of the rotary drilling rig. The system is more independent and less dependent on external factors, making the equipment's operating environment more flexible. However, when the excavating wheel rotates to a cohesive soil layer, soil will adhere to the excavating wheel, significantly reducing the excavating wheel's ability to dig into the soil layer. The drill needs to be lifted for cleaning before continuing work, which greatly reduces the progress of rotary drilling. Summary of the Invention

[0005] The purpose of this invention is to provide a rotary drilling tool for square piles to solve the problems mentioned in the background art.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] The present invention provides a rotary drilling tool for square piles, comprising a housing, on both sides of which digging wheels are symmetrically and rotatably connected. A soil removal mechanism is rotatably connected to one side of the housing between the two digging wheels on the same side. The soil removal mechanism abuts against the digging wheels to remove the soil layer adhering to the digging wheels. A soil discharge mechanism is rotatably connected to one end of the housing near the soil removal mechanism.

[0008] Furthermore, the soil removal mechanism includes a first rotating shaft rotatably connected to the housing, a drive gear fixedly connected to the first rotating shaft, a drive rack slidably connected to the side of the housing near the drive gear, a scraper fixedly connected to the drive rack, a first through groove arrayed on the scraper, the first through groove matching the drill bit on the excavating wheel, a second through groove arrayed on the scraper near the first through groove, the first through groove and the second through groove being spaced apart, and a pusher assembly fixedly connected to the outer wall of the first rotating shaft near the drive gear.

[0009] Furthermore, the pushing assembly includes a first ratchet fixedly connected to the outer wall of the first rotating shaft near the drive gear. A second ratchet is fixedly connected to the end of the first ratchet away from the housing via a connecting rod. A first connecting shaft is rotatably connected to one end of the housing, passing through the first rotating shaft. A first pawl is hinged to the first connecting shaft, meshing with the first ratchet. A rotating sleeve is rotatably connected to the first connecting shaft, with a second pawl fixedly connected to the rotating sleeve. A conversion gear is fixedly connected to the end of the first connecting shaft located inside the rotating sleeve. A conversion gear ring is fixedly connected to the inner wall of the rotating sleeve, and the conversion gear ring and the conversion gear are connected via a connecting gear transmission. The second pawl meshes with the second ratchet. A rotating rod is fixedly connected to the end of the first connecting shaft away from the second pawl. A push rod is hinged to the rotating rod, slidingly connected to the housing. One end of the push rod is near the digging wheel, and the push rod is located above the scraper plate.

[0010] Furthermore, the soil discharge mechanism includes a rotating roller symmetrically rotatably connected to the housing, a transmission belt drivingly connected to the rotating roller, fixed plates fixedly connected in an array on the transmission belt, a storage compartment provided on the inner wall of the housing, a motor fixedly connected to one end of the rotating roller, a second rotating shaft rotatably connected inside the storage compartment, a synchronous belt fixedly connected to the second rotating shaft, a push plate fixedly connected to the synchronous belt, a discharge port opened at the upper end of the storage compartment, a discharge pipe fixedly connected to the housing at the position of the discharge port, a fixed shaft rotatably connected inside the discharge pipe, and a spiral blade fixedly connected to the fixed shaft.

[0011] Furthermore, a scraper is fixedly connected to one end of the push rod near the digging wheel.

[0012] Furthermore, the first through slot and the second through slot are spaced apart.

[0013] Furthermore, both the first and second through slots are inclined, and the inclination directions of the first and second through slots are opposite.

[0014] Furthermore, the upper and lower ends of the first and second through slots are offset by equal distances.

[0015] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0016] This invention removes the soil adhering to the excavating wheel through a soil removal mechanism, allowing the drill bit on the excavating wheel to fully contact the soil layer to be excavated, thus avoiding a reduction in the excavation capacity of the soil layer, reducing the need for drilling and cleaning, and increasing the progress of rotary drilling. The soil discharge mechanism promptly discharges the excavated soil, preventing it from accumulating inside the square pile, increasing the resistance of the drill bit, and preventing the soil from adhering to the excavating wheel again, thus reducing the excavation capacity.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. 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 the overall structure of the present invention;

[0020] Figure 2 This is a side sectional view of the present invention;

[0021] Figure 3 This is a partial structural schematic diagram of the soil removal mechanism of the present invention;

[0022] Figure 4 This is a schematic diagram of the connection structure between the scraper and the drive rack of the present invention;

[0023] Figure 5 This is a partial structural schematic diagram of the soil dumping mechanism of the present invention;

[0024] Figure 6 This is a partial structural schematic diagram of the push-out component of the present invention.

[0025] In the picture:

[0026] 1. Housing; 2. Excavating wheel; 3. Soil removal mechanism; 4. Soil discharge mechanism; 5. First rotating shaft; 6. Drive gear; 7. Drive rack; 8. Scraper; 9. First through groove; 10. Second through groove; 11. Pushing assembly; 12. First ratchet; 13. Second ratchet; 14. First connecting shaft; 15. First pawl; 16. Rotating sleeve; 17. Second pawl; 18. Converting gear; 19. Converting gear ring; 20. Rotating rod; 21. Push rod; 22. Rotating roller; 23. Transmission belt; 24. Fixed plate; 25. Storage bin; 27. Second rotating shaft; 28. Synchronous belt; 29. ​​Push plate; 30. Discharge pipe; 31. Fixed shaft; 32. Spiral blade; 33. Scraper. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] Please see Figures 1 to 6 The present invention provides a rotary drilling tool for square piles, including a housing 1, on both sides of the housing 1 being symmetrically and rotatably connected to digging wheels 2, and on one side of the housing 1 between the two digging wheels 2 on the same side being rotatably connected to a soil removal mechanism 3, the soil removal mechanism 3 abutting against the digging wheels 2 for removing the soil layer adhering to the digging wheels 2, and a soil discharge mechanism 4 being rotatably connected to one end of the housing 1 near the soil removal mechanism 3.

[0029] The soil removal mechanism 3 removes the soil adhering to the excavating wheel 2, allowing the drill bit on the excavating wheel 2 to fully contact the soil layer to be excavated, thus avoiding a reduction in the excavation capacity of the soil layer, reducing the need for drilling and cleaning, and increasing the progress of rotary drilling. The soil discharge mechanism 4 promptly discharges the excavated soil, preventing it from accumulating inside the square pile, increasing the resistance of the drill bit, and preventing the soil from adhering to the excavating wheel 2 again, thus reducing the excavation capacity.

[0030] Please see Figure 3 and Figure 4The soil removal mechanism 3 includes a first rotating shaft 5 rotatably connected to the housing 1, a drive gear 6 fixedly connected to the first rotating shaft 5, a drive rack 7 slidably connected to the side of the housing 1 near the drive gear 6, a scraper 8 fixedly connected to the drive rack 7, a first through groove 9 arrayed on the scraper 8, the first through groove 9 matching the drill bit on the excavating wheel 2, a second through groove 10 arrayed near the first through groove 9 on the scraper 8, the first through groove 9 and the second through groove 10 being spaced apart, and a pusher assembly 11 fixedly connected to the outer wall of the first rotating shaft 5 near the drive gear 6.

[0031] During excavation, the excavating wheel 2 rotates under the drive of the hydraulic system. As the excavating wheel 2 rotates, the drill bit on it also rotates. The drill bits on the excavating wheel 2 are staggered from the outside to the inside, so the drill bits will contact the first through groove 9 and the second through groove 10 in sequence. When the drill bit contacts the first through groove 9, it will slide along the inner wall of the first through groove 9, which will drive the scraper plate 8 to move. Subsequently, the adjacent drill bit will slide along the inner wall of the second through groove 10, which will drive the scraper plate 8 to move in the opposite direction. The above process is repeated in sequence. The scraper plate 8 will scrape off the soil layer adhering to the excavating wheel 2. When the scraper plate 8 changes its moving direction, it is at the front end of the drill bit, removing the soil layer adhering to the front end of the drill bit, exposing the drill bit again. This ensures that the drill bit can fully contact the soil layer, avoids reducing the excavation capacity of the soil layer, reduces the number of drilling and cleaning steps, and thus increases the progress of rotary drilling. The pusher assembly 11 will further clean the soil layer on the excavating wheel 2, reduce the running resistance of the excavating wheel 2, and increase the speed of rotary drilling.

[0032] Please see Figure 3 and Figure 6The push-off assembly 11 includes a first ratchet 12 fixedly connected to the outer wall of the first rotating shaft 5 near the drive gear 6. A second ratchet 13 is fixedly connected to the end of the first ratchet 12 away from the housing 1 via a connecting rod. A first connecting shaft 14 is rotatably connected to one end of the housing 1, passing through the first rotating shaft 5. A first pawl 15 is hinged to the first connecting shaft 14, meshing with the first ratchet 12. A rotating sleeve 16 is rotatably connected to the first connecting shaft 14, and a second pawl 17 is fixedly connected to the rotating sleeve 16. A conversion gear 18 is fixedly connected to one end of the first connecting shaft 14 located inside the rotating sleeve 16. A conversion gear ring 19 is fixedly connected to the inner wall of the rotating sleeve 16. The conversion gear ring 19 and the conversion gear 18 are connected by a connecting gear transmission. The second pawl 17 meshes with the second ratchet 13. A rotating rod 20 is fixedly connected to one end of the first connecting shaft 14 away from the second pawl 17. A push rod 21 is hinged to the rotating rod 20. The push rod 21 is slidably connected to the housing 1. One end of the push rod 21 is close to the digging wheel 2. The push rod 21 is located above the scraper plate 8.

[0033] During the movement of the scraper plate 8, the scraper plate 8 moves, causing the drive rack 7 to move. The drive rack 7 moves, causing the drive gear 6 to rotate. The drive gear 6 rotates, causing the first rotating shaft 5 to rotate. The first rotating shaft 5 rotates, causing the first ratchet 12 to rotate. The first ratchet 12 rotates, causing the first pawl 15 to rotate. The first pawl 15 rotates, causing the first connecting shaft 14 to rotate. At this time, the rotation of the first ratchet 12 drives the second ratchet 13 to rotate via the connecting rod. When the second ratchet 13 rotates, the second pawl 17 slides on the internal teeth of the second ratchet 13, and the second ratchet 13 does not drive the second pawl 17 to rotate. When the scraper plate 8 moves in the opposite direction, the scraper plate 8 drives the drive rack 7 to move in the opposite direction. The drive rack 7 moves in the opposite direction, causing the drive gear 6 to rotate in the opposite direction. The drive gear 6 rotates in the opposite direction, causing the first rotating shaft 5 to rotate in the opposite direction. The first rotating shaft 5 rotates in the opposite direction, causing the first ratchet 12 to rotate in the opposite direction. When the ratchet 12 rotates in the opposite direction, the first pawl 15 slides on the internal teeth of the first ratchet 12. The first ratchet 12 will not drive the first pawl 15 to rotate. At this time, the first ratchet 12 drives the second ratchet 13 to rotate through the connecting rod. The rotation of the second ratchet 13 drives the second pawl 17 to rotate. The rotation of the second pawl 17 drives the rotating sleeve 16 to rotate. The rotation of the rotating sleeve 16 drives the rotating gear ring to rotate. The rotation of the rotating gear ring drives the conversion gear 18 to rotate through the connecting gear. The rotation of the conversion gear 18 drives the first connecting shaft 14 to rotate. Therefore, when the scraper plate 8 moves, the first connecting shaft 14 rotates in one direction. The rotation of the first connecting shaft 14 drives the rotating rod 20 to rotate. The rotation of the rotating rod 20 drives the push rod 21 to move back and forth. The movement of the push rod 21 will push the soil layer on the digging wheel 2 to fall off, further cleaning the soil layer on the digging wheel 2, reducing the running resistance of the digging wheel 2, and increasing the speed of rotary digging.

[0034] Please see Figure 2 and Figure 5 The soil discharge mechanism 4 includes a rotating roller 22 symmetrically rotatably connected to the housing 1. A transmission belt 23 is driven to the rotating roller 22. Fixed plates 24 are fixedly connected to the transmission belt 23 in an array. A storage chamber 25 is provided on the inner wall of the housing 1. A motor is fixedly connected to one end of the rotating roller 22. A second rotating shaft 27 is rotatably connected inside the storage chamber 25. A synchronous belt 28 is fixedly connected to the second rotating shaft 27. A push plate 29 is fixedly connected to the synchronous belt 28. A discharge port is opened at the upper end of the storage chamber 25. A discharge pipe 30 is fixedly connected to the housing 1 at the position of the discharge port. A fixed shaft 31 is rotatably connected inside the discharge pipe 30. A spiral blade 32 is fixedly connected to the fixed shaft 31.

[0035] The rotating roller 22 and the second rotating shaft 27 are connected by a transmission structure. When the rotating roller 22 rotates, the second rotating shaft 27 rotates accordingly. During rotary drilling, the motor is started, and the motor drives the rotating roller 22 to rotate. The rotation of the rotating roller 22 drives the transmission belt 23 to rotate, and the rotation of the transmission belt 23 drives the fixed plate 24 to rotate. The soil layer will fall onto the fixed plate 24. When the fixed plate 24 rotates, it will move the soil into the storage bin 25. The rotation of the second rotating shaft 27 will drive the synchronous belt 28 to rotate, and the rotation of the synchronous belt 28 will drive the push plate 29 to rotate. The push plate 29 pushes the soil to one end of the storage bin 25. The fixed shaft 31 is rotated by a drive source. The drive source drives the fixed shaft 31 to rotate, and the rotation of the fixed shaft 31 drives the spiral blades 32 to rotate. The spiral blades 32 discharge the soil in the storage bin 25, avoiding the accumulation of soil in the square pile hole, reducing the steps of lifting the drill to clean the soil layer, and speeding up the progress of rotary drilling.

[0036] Please see Figure 3 The push rod 21 is fixedly connected to a scraper 33 at one end near the excavating wheel 2. The scraper 33 is elastic. When the push rod 21 moves, it will drive the scraper 33 to clean the excavating wheel 2. When the scraper 33 comes into contact with the drill bit during the movement, it will vibrate, making the soil on the scraper 33 easier to fall off.

[0037] Please see Figure 4 The first through groove 9 and the second through groove 10 are spaced apart, so that when the drill bit on the excavating wheel 2 passes through the first through groove 9, it will drive the scraper 8 to move, and when it passes through the second through groove 10, it will drive the scraper 8 back to the initial position.

[0038] Please see Figure 4The first through groove 9 and the second through groove 10 are both inclined. The first through groove 9 and the second through groove 10 are inclined in opposite directions. The inclined first through groove 9 and the second through groove 10 can drive the scraper 8 to move when the drill bit on the digging wheel 2 passes through the first through groove 9 and the second through groove 10. The opposite inclination of the first through groove 9 and the second through groove 10 can enable the scraper 8 to return to the initial position after moving.

[0039] Please see Figure 4 The upper and lower ends of the first through slot 9 and the second through slot 10 are offset by equal distances.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rotary drilling tool for square piles, characterized in that, The box (1) includes a housing (1), on both sides of which digging wheels (2) are symmetrically rotatably connected. A soil removal mechanism (3) is rotatably connected to one side of the housing (1) between the two digging wheels (2) on the same side. The soil removal mechanism (3) abuts against the digging wheels (2) to remove the soil layer adhering to the digging wheels (2). A soil discharge mechanism (4) is rotatably connected to one end of the housing (1) near the soil removal mechanism (3).

2. The rotary drilling tool for square piles according to claim 1, characterized in that, The soil removal mechanism (3) includes a first rotating shaft (5) rotatably connected to the housing (1), a drive gear (6) fixedly connected to the first rotating shaft (5), a drive rack (7) slidably connected to the side of the housing (1) near the drive gear (6), a scraper (8) fixedly connected to the drive rack (7), a first through groove (9) arrayed on the scraper (8), the first through groove (9) matching the drill bit on the excavating wheel (2), a second through groove (10) arrayed on the scraper (8) near the first through groove (9), the first through groove (9) and the second through groove (10) being spaced apart, and a pusher assembly (11) fixedly connected to the outer wall of the first rotating shaft (5) near the drive gear (6).

3. The rotary drilling tool for square piles according to claim 2, characterized in that, The push-off assembly (11) includes a first ratchet (12) fixedly connected to the outer wall of the first rotating shaft (5) near the drive gear (6). A second ratchet (13) is fixedly connected to the end of the first ratchet (12) away from the housing (1) via a connecting rod. A first connecting shaft (14) is rotatably connected to one end of the housing (1). The first connecting shaft (14) passes through the first rotating shaft (5). A first pawl (15) is hinged to the first connecting shaft (14), and the first pawl (15) meshes with the first ratchet (12). A rotating sleeve (16) is rotatably connected to the first connecting shaft (14), and a second pawl (17) is fixedly connected to the rotating sleeve (16). A connecting shaft (14) is fixedly connected to a conversion gear (18) at one end inside a rotating sleeve (16). A conversion gear ring (19) is fixedly connected to the inner wall of the rotating sleeve (16). The conversion gear ring (19) and the conversion gear (18) are connected by a connecting gear transmission. The second pawl (17) meshes with the second ratchet (13). A rotating rod (20) is fixedly connected to the end of the first connecting shaft (14) away from the second pawl (17). A push rod (21) is hinged on the rotating rod (20). The push rod (21) is slidably connected to the housing (1). One end of the push rod (21) is close to the excavator wheel (2). The push rod (21) is located above the scraper plate (8).

4. The rotary drilling tool for square piles according to claim 1, characterized in that, The soil discharge mechanism (4) includes a rotating roller (22) symmetrically rotatably connected to the box (1), a transmission belt (23) is connected to the rotating roller (22), and a fixed plate (24) is fixedly connected to the transmission belt (23) in an array. The inner wall of the box (1) is provided with a storage chamber (25). One end of the rotating roller (22) is fixedly connected to a motor. A second rotating shaft (27) is rotatably connected inside the storage chamber (25). A synchronous belt (28) is fixedly connected to the second rotating shaft (27). A push plate (29) is fixedly connected to the synchronous belt (28). A discharge port is opened at the upper end of the storage chamber (25). A discharge pipe (30) is fixedly connected to the box (1) at the position of the discharge port. A fixed shaft (31) is rotatably connected inside the discharge pipe (30). A spiral blade (32) is fixedly connected to the fixed shaft (31).

5. A rotary drilling tool for square piles according to claim 3, characterized in that, The push rod (21) is fixedly connected to a scraper (33) at one end near the digging wheel (2).

6. A rotary drilling tool for square piles according to claim 2, characterized in that, The first through slot (9) and the second through slot (10) are spaced apart.

7. A rotary drilling tool for square piles according to claim 2, characterized in that, The first through groove (9) and the second through groove (10) are both inclined, and the inclination directions of the first through groove (9) and the second through groove (10) are opposite.

8. A rotary drilling tool for square piles according to claim 2, characterized in that, The upper and lower ends of the first through slot (9) and the second through slot (10) are offset by the same distance.

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