Artificial hole digging pile water mill drill

Abstract

The present application relates to the technical field of basic drilling equipment, and particularly relates to a manual hole digging pile water mill drill, which comprises a base, a guide rail, a motor and a cylinder drill, a first sliding sleeve and a second sliding sleeve are slidably connected to the guide rail, a fixed arm is fixedly connected to the outside of the first sliding sleeve, a first guide hole is formed in the top of the cylinder drill, and a second guide hole is formed in the fixed arm. When the cylinder drill drills a disc of depth, a bolt is sequentially inserted downward through the second guide hole and the first guide hole, and finally inserted into the gap between the rock core and the inner side wall of the cylinder drill. The lower end of the bolt is inserted into the gap between the rock core and the inner side wall of the cylinder drill by the second driving assembly. Thus, the rock core is broken, and the rock core is fixed in the inner side of the cylinder drill, which facilitates the rock core to be taken out from the hole through the cylinder drill, and improves the construction efficiency. The technical scheme is mainly used for foundation excavation, and solves the problem that the existing water mill drill is inconvenient to take out the drilled rock core.

Description

Technical Field

[0001] This invention relates to the field of basic drilling equipment technology, specifically to a water-cooled drill for manually excavated pile foundations. Background Technology

[0002] Manually excavated bored piles refer to piles where the hole is dug manually, a reinforcing cage is placed inside, and concrete is poured to form the pile. Manually excavated bored piles generally have a larger diameter, with even the smallest exceeding 800 mm. They are capable of supporting structural main bodies with fewer floors but higher pressure, and are therefore widely used.

[0003] During the drilling of bored piles, water-cooled drills are commonly used to extract rock samples when encountering rock strata. The water-cooled drill cuts the rock strata from top to bottom using a tubular drill, creating a circular groove. As the tubular drill moves downwards, it gradually collects the rock core into the tubular drill. After drilling to a certain depth, the drilling stops, and the drill is then lifted. The rock core extracted from the tubular drill needs to be removed and placed in a hopper for transport away as slag.

[0004] However, with existing water-cooled drills, due to the relatively good integrity of some rock strata, the core samples obtained during the drilling process remain intact. After the drill is pulled out, the core remains connected to the original rock strata, making it difficult to remove the core from the hole. Construction workers usually try to break the core by repeatedly rotating the drill bit forward and backward, but this method is not very effective and has caused considerable trouble for the construction workers. Summary of the Invention

[0005] The purpose of this invention is to provide a water-jet drill for manually excavated piles, which solves the problem that existing water-jet drills are inconvenient for extracting the drilled rock core.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a water-cooled drill for manually excavated piles, comprising a base, a guide rail, a motor, and a cylindrical drill, wherein the guide rail is fixedly connected to the base, and a first sliding sleeve and a second sliding sleeve are slidably connected on the guide rail, the second sliding sleeve being located above the first sliding sleeve; a fixed arm is fixedly connected to the outside of the first sliding sleeve, and the cylindrical drill is rotatably mounted on the fixed arm, the opening of the cylindrical drill facing the base, and a plurality of cutting teeth are fixedly connected to the opening of the cylindrical drill along the circumference of the cylindrical drill, the inner surface of the cutting teeth protruding from the inner surface of the cylindrical drill;

[0007] A mounting box is fixedly connected to the fixed arm. A transmission assembly is provided inside the mounting box. The motor is fixedly mounted on the mounting box. The motor drives the drill to rotate through the transmission assembly.

[0008] The first sliding sleeve is provided with a first driving component, which is used to drive the first sliding sleeve to move vertically along the guide rail;

[0009] The top of the drill bit has a first guide hole, the horizontal projection of which is located inside the drill bit and tangent to its inner wall; the fixed arm has a second guide hole, the horizontal projection of which is located on the movement trajectory of the first guide hole; a pin is slidably connected inside the second guide hole, the lower end of which is wedge-shaped.

[0010] A pressure arm located directly above the second guide hole is fixedly connected to the outer side of the second sliding sleeve. A second drive assembly is installed on the second sliding sleeve, which is used to drive the second sliding sleeve to move vertically along the guide rail.

[0011] The principle and effect of the above technical solution are as follows: During drilling operations, the motor drives the core drill to rotate via the transmission assembly, and the first drive assembly drives the first sliding sleeve to move towards the base, thereby driving the core drill to move and drill into the rock strata. Drilling stops when the core drill has reached a depth of one plate. Because the inner surface of the cutting teeth protrudes from the inner surface of the core drill, the diameter of the drilled rock core is smaller than the inner diameter of the core drill, thus leaving a gap between the rock core and the inner wall of the core drill. The position of the core drill is adjusted so that the first guide hole and the second guide hole are vertically aligned, allowing the lower end of the pin to insert into the second guide hole. The wedge-shaped end of the pin is then inserted into the gap between the rock core and the inner wall of the core drill. The second drive assembly drives the lower pressure arm to move towards the base, causing the lower pressure arm to abut against the upper end of the pin, thus gradually pushing the lower end of the pin into the gap between the rock core and the inner wall of the core drill. Because the pin is inserted into the gap between the rock core and the inner wall of the drill bit, the upper side of the rock core is compressed, causing it to break and making it easier to remove. Furthermore, because the pin is firmly inserted into the gap between the rock core and the inner wall of the drill bit, the rock core is fixed inside the drill bit, making it easier to remove from the hole through the drill bit, thus improving construction efficiency.

[0012] The present invention is further configured such that the second drive assembly includes a second connecting seat, a second rotating shaft, and a second throttle; a rack arranged longitudinally is fixedly connected to the guide rail; the second connecting seat is fixedly connected to the outside of the second sliding sleeve; a second mounting cavity is formed in the second connecting seat and communicates with the second sliding sleeve; a second shaft hole is formed laterally on the second connecting seat; the second rotating shaft is rotatably connected to the second shaft hole; a second gear is fixedly connected to the second rotating shaft and meshes with the rack; one end of the second rotating shaft extends to the outside of the second connecting seat; a second sliding hole perpendicular to the axial direction is formed at the end of the second rotating shaft located outside the second connecting seat; and the second throttle passes through the second sliding hole.

[0013] By adopting the above technical solution, when it is necessary to adjust the position of the second sliding sleeve on the guide rail, the second rotary handle drives the second rotating shaft to rotate, thereby driving the second gear to rotate. The second gear and the rack cooperate with each other, causing the second connecting seat to drive the second sliding sleeve to move vertically along the guide rail, which in turn drives the lower pressure arm to move vertically. Since it is easier to drive the second rotating shaft to rotate via the second rotary handle, it is also easier to press the pin downwards with the lower pressure arm, thereby driving the lower end of the pin to push into the gap between the core and the drill bit.

[0014] The present invention is further configured such that a limiting component is installed on the outer side of the second sliding sleeve, the limiting component being used to prevent the second rotating shaft from rotating when the second sliding sleeve moves toward the base.

[0015] By adopting the above technical solution, since the second sliding sleeve remains in contact with the first sliding sleeve due to gravity when there is no vertical constraint, the power burden for adjusting the first sliding sleeve is increased. Because the limiting component prevents the second rotating shaft from rotating when the second sliding sleeve moves towards the base, the second sliding sleeve can be fixed on the guide rail away from the first sliding sleeve when it is not needed to move towards the base, thus avoiding any impact on the operation of the first sliding sleeve.

[0016] The present invention is further configured such that the limiting component includes a third connecting seat, a limiting pin, and a ratchet; the third connecting seat is located between the second throttle and the second connecting seat, and a third mounting cavity is formed on the inner side of the third connecting seat; a second shaft hole is formed on the third connecting seat for the second rotating shaft to pass through, the second shaft hole communicating with the third mounting cavity, and the second rotating shaft passing through the second shaft hole; the ratchet is fixedly connected to the second rotating shaft, and the ratchet is located in the third mounting cavity; a vertical first mounting hole is formed on the upper side of the third connecting seat, and the first mounting hole communicating with the third mounting cavity; a limiting ring is integrally formed on the lower section of the limiting pin, and a limiting ratchet is fixedly connected to the lower end of the limiting pin. The pawl, which is a limiting pawl, engages with a ratchet; a cover plate is fixedly connected to the upper side of the third connecting seat, and a second mounting hole is provided on the cover plate, which corresponds to the first mounting hole, and the diameter of the second mounting hole is smaller than that of the first mounting hole; a limiting pin passes through the second mounting hole and the first mounting hole, and a compression spring is provided in the first mounting hole, which is sleeved on the limiting pin, and the two ends of the compression spring abut against the cover plate and the limiting ring respectively; the limiting ring is slidably connected to the first mounting hole, and a slider is fixedly connected to the outside of the limiting ring; a first limiting groove is provided on the inner side of the first mounting hole for the slider to slide vertically, and the slider is slidably connected in the first limiting groove.

[0017] By adopting the above technical solution, in the initial state, the limiting pawl engages with the ratchet to prevent the ratchet from rotating forward, thereby preventing the second shaft from rotating forward. Furthermore, because the second gear meshes with the rack, it prevents the second sliding sleeve from moving towards the base. When it is necessary to use the lowering arm to push the pin forward, the limiting pin is lifted upward, causing the limiting pawl to disengage from the ratchet, thus releasing the limiting pawl's restriction on the ratchet. This facilitates the second drive assembly to drive the second sliding sleeve towards the base, thereby facilitating the pin-pushing operation of the fixed arm. When the pin is embedded in the gap between the core and the drill bit, and the core is broken, the limiting pin is released, and it resets under the action of the compression spring, thus restricting the forward rotation of the ratchet. Because the slider is slidably connected within the first limiting groove, it prevents the limiting pin from rotating, facilitating the reset of the limiting pawl. When the drill is lifted by the first drive assembly, the drill bit rises, and simultaneously the pin and the first sliding sleeve rise. The first sliding sleeve drives the second sliding sleeve to move upward. Since the limiting pawl does not restrict the ratchet from rotating in the opposite direction, the second gear can rotate when the second sliding sleeve moves upward, so that the second sliding sleeve will not hinder the first sliding sleeve from moving upward, thus smoothly lifting the rock core upward.

[0018] The present invention is further configured such that two first limiting slide grooves are symmetrically provided, and the plane formed by the two first limiting slide grooves is perpendicular to the axial direction of the second rotating shaft; a second limiting slide groove for the slider to pass through is provided circumferentially on the inner side of the first mounting hole, and the two ends of the second limiting slide groove are respectively connected to the two first limiting slide grooves.

[0019] The above-mentioned technical solution requires manually lifting the limiting pin when releasing the ratchet's restriction on the ratchet, and this is cumbersome as the second sliding sleeve moves downwards. In this solution, two first limiting grooves are provided. Initially, the slider is in the first first limiting groove. When it's necessary to release the restriction on the ratchet's forward rotation, the limiting pin is lifted, allowing the slider to enter the second limiting groove. After entering the second limiting groove, the limiting pin is rotated, moving the slider into the second first limiting groove. Releasing the limiting pin and resetting it restricts the ratchet's reverse rotation, but not its forward rotation, allowing the second sliding sleeve and the lower pressure arm to move smoothly towards the base without continuously lifting the limiting pin. When it's necessary to move the second sliding sleeve upwards, the limiting pin is lifted and rotated in the opposite direction, restoring the limiting pin to its initial state, thus releasing the restriction on the ratchet's reverse rotation and changing it to restricting its forward rotation. This makes the operation simple and convenient.

[0020] The invention is further configured such that the outer side of the cutting tooth protrudes from the outer surface of the barrel drill, and a spiral-shaped first wear-resistant strip is fixedly connected to the outer side of the barrel drill along the axial direction, the outer surface of the first wear-resistant strip being flush with the outer surface of the cutting tooth.

[0021] By adopting the above technical solution, water is injected into the barrel drill during drilling, thereby reducing the temperature and drilling resistance of the barrel drill. During the drilling process, a large amount of gravel and debris is generated in the gap between the barrel drill and the rock strata, increasing the frictional resistance of the barrel drill during drilling and also increasing the resistance when lifting the drill. Because the outer side of the cutting teeth protrudes from the outer surface of the barrel drill, the gap between the barrel drill and the drilled hole wall is larger, making it easier for the water flow to carry the gravel and debris outward from bottom to top. Furthermore, because the barrel drill has a spiral first wear-resistant strip on its outer side, the spiral first wear-resistant strip agitates the gravel and debris on the outer side of the barrel drill and discharges it upward from the hole, thereby reducing the amount of gravel and debris between the barrel drill and the rock strata, thus reducing the drilling resistance of the barrel drill and reducing the power consumption of the motor.

[0022] The present invention is further configured such that a second wear-resistant strip in a spiral shape arranged circumferentially is fixedly connected to the inner side of the barrel drill, the spiral direction of the second wear-resistant strip is opposite to the spiral direction of the first wear-resistant strip, and the inner surface of the second wear-resistant strip is flush with the inner surface of the cutting teeth.

[0023] By adopting the above technical solution, since a second wear-resistant strip is set on the inner side of the drill bit, and the spiral direction of the second wear-resistant strip is opposite to that of the first wear-resistant strip, when the drill bit is drilling, the crushed stone and debris on the inner side are continuously sent to the bottom by the second wear-resistant strip. The crushed stone and debris enter the outer side of the drill bit through the gap between the cutting teeth and the bottom of the drill bit, and after entering the outer side, they are carried to the ground by the first wear-resistant strip, which increases the efficiency of debris discharge between the inner and outer sides of the drill bit and the rock strata.

[0024] The present invention is further configured such that a blind hole is provided at the top of the guide rail, a top support is internally threaded into the blind hole, the upper section of the top support is located outside the blind hole, and a first through hole for the pin to pass through is provided laterally on the top support.

[0025] By adopting the above technical solution, when drilling holes with a water-jet drill on the construction site, scaffolding is usually used to fix the drill to prevent it from tilting and thus preventing the drilling of angled holes. When fixing it with scaffolding or other support rods, the pin is removed from the second guide hole and inserted into the first through hole. The pin drives the top support to rotate, thereby causing the top support to move upward and press against the scaffolding, thus fixing the water-jet drill and preventing it from tilting. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram from the front view of the embodiment;

[0027] Figure 2 This is a three-dimensional structural schematic diagram from the rear view of the embodiment;

[0028] Figure 3 This is a front view of an embodiment;

[0029] Figure 4 This is a three-dimensional structural diagram of the implementation of the middle cylinder drill and the first drive assembly;

[0030] Figure 5 yes Figure 4 A partial cross-sectional diagram;

[0031] Figure 6 This is a three-dimensional structural diagram of the second drive component and the limiting component;

[0032] Figure 7 yes Figure 6 An explosion diagram;

[0033] Figure 8 This is a cross-sectional view of the second mounting cavity in the embodiment;

[0034] Figure 9 This is a cross-sectional view of the limiting pin in the embodiment;

[0035] Figure 10 yes Figure 9 Enlarged view at point A in the middle;

[0036] Figure 11 This is a cross-sectional view of the tubular drill in the embodiment;

[0037] Figure 12 This is a three-dimensional structural diagram of the pin being assembled into the first guide hole and the second guide hole in the embodiment.

[0038] In the diagram: 1. Base; 2. Guide rail; 3. Motor; 4. Drill bar; 5. First drive assembly; 5. First connecting seat; 501. First rotating shaft; 502. First gear; 503. First throttle; 504. Second drive assembly; 6. Second connecting seat; 601. Second rotating shaft; 602. Second throttle; 603. Second mounting cavity; 604. Second shaft hole; 605. Second gear; 606. Limiting assembly; 7. Third connecting seat; 701. First mounting hole; 702. Limiting ring; 703. Limiting pin; 704. Limiting pawl; 705. Ratchet; 706. Cover plate; 7. 7. Second mounting hole 708, compression spring 709, slider 710, first limiting groove 711, second limiting groove 712, fourth shaft hole 713, third mounting cavity 714, rack 8, first sliding sleeve 9, second sliding sleeve 10, fixed arm 11, cutting tooth 12, first wear-resistant strip 13, second wear-resistant strip 14, mounting box 15, first guide hole 16, second guide hole 17, pin 18, first fixed head 19, lower pressure arm 20, second fixed head 21, positioning groove 22, top support 23, fastening bolt 24. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to the accompanying drawings.

[0040] A type of water-cooled drill for manually excavated piles, such as Figure 1-12 As shown, the device includes a base 1, a guide rail 2, a motor 3, and a cylindrical drill 4. The guide rail 2 is fixedly connected to the base 1 and is vertically arranged. A rack 8 is fixedly connected to the right side of the guide rail 2 and is arranged longitudinally along the guide rail 2. A first sliding sleeve 9 and a second sliding sleeve 10 are slidably connected to the guide rail 2, with the second sliding sleeve 10 located above the first sliding sleeve 9. A fixed arm 11 is fixedly connected to the left side of the outside of the first sliding sleeve 9, and the cylindrical drill 4 is rotatably mounted on the fixed arm 11. The upper end of the cylindrical drill 4 is closed, and the lower end is open, with the opening of the lower end facing the base 1. Several cutting teeth 12 are fixedly connected at intervals along the circumference of the opening of the cylindrical drill 4. The inner surface of the cutting teeth 12 protrudes from the inner surface of the cylindrical drill 4, and the outer surface of the cutting teeth 12 protrudes from the outer surface of the cylindrical drill 4. A spiral-shaped first wear-resistant strip 13 arranged axially is fixedly connected to the outside of the cylindrical drill 4, and the outer surface of the first wear-resistant strip 13 is flush with the outer surface of the cutting teeth 12. A spiral second wear-resistant strip 14 is fixedly connected to the inner side of the barrel drill 4. The spiral direction of the second wear-resistant strip 14 is opposite to that of the first wear-resistant strip 13. The inner surface of the second wear-resistant strip 14 is flush with the inner surface of the cutting tooth 12.

[0041] A mounting box 15 is fixedly connected to the upper side of the fixed arm 11, and the motor 3 is fixedly mounted on the mounting box 15. A vertical third shaft hole is opened on the fixed arm 11, which communicates with the mounting box 15. A transmission assembly is provided inside the mounting box 15. The transmission assembly is a reduction gear set in the prior art. The reduction gear set drives other components to rotate through the output shaft. The output shaft is rotatably connected in the third shaft hole, and the lower end of the output shaft is fixedly connected to the top center of the drill 4. The output end of the motor 3 drives the drill 4 to rotate through the reduction gear set, thereby increasing the output torque. A first drive assembly 5 is provided on the first sliding sleeve 9. The first drive assembly 5 is used to drive the first sliding sleeve 9 to move vertically along the guide rail 2. The first drive assembly 5 includes a first connecting seat 501, a first rotating shaft 502, a first gear 503, and a first throttle 504. The first connecting seat 501 is fixedly connected to the right side of the first sliding sleeve 9. A first mounting cavity is opened inside the first connecting seat 501, which communicates with the inside of the first sliding sleeve 9. The first connecting seat 501 has a first shaft hole that extends through both the front and rear sides, and the first shaft hole communicates with the first mounting cavity. The first rotating shaft 502 is rotatably connected in the first shaft hole, and the first gear 503 is fixedly connected to the first rotating shaft 502. The first gear 503 is located in the first mounting cavity and meshes with the rack 8. The front end of the first rotating shaft 502 extends outside the first shaft hole, and the end of the first rotating shaft 502 outside the first shaft hole has a first sliding hole. The opening direction of the first sliding hole is perpendicular to the axial direction of the first rotating shaft 502, and the first handle 504 passes through the first sliding hole. The top of the drill bar 4 is provided with a first guide hole 16. Three first guide holes 16 are provided at equal intervals along the circumference of the drill bar 4. The horizontal projection of the first guide hole 16 is located inside the drill bar 4 and is tangent to the inner wall of the drill bar 4. The upper end of the fixed arm 11 is provided with a second guide hole 17. The horizontal projection of the second guide hole 17 is located on the movement trajectory of the first guide hole 16. A pin 18 is slidably connected in the second guide hole 17. The upper end of the pin 18 is fixedly connected with a first fixing head 19. The first fixing head 19 is spherical and its outer diameter is larger than the diameter of the pin 18. The lower end of the pin 18 is wedge-shaped.

[0042] The second sliding sleeve 10 is fixedly connected to the left side of the outside of the second sliding sleeve 10. The lower pressure arm 20 is located directly above the second guide hole 17. The second driving assembly 6 is installed on the second sliding sleeve 10. The second driving assembly 6 is used to drive the second sliding sleeve 10 to move vertically along the guide rail 2. The second drive assembly 6 includes a second connecting seat 601, a second rotating shaft 602, and a second throttle 603. The second connecting seat 601 is fixedly connected to the outside right side of the second sliding sleeve 10. A second mounting cavity 604 is formed inside the second connecting seat 601, and the second mounting cavity 604 communicates with the second sliding sleeve 10. A second shaft hole 605 is formed laterally on the second connecting seat 601, and the second shaft hole 605 passes through the front and rear sides of the second connecting seat 601. The second rotating shaft 602 is rotatably connected inside the second shaft hole 605. A second gear 606 is fixedly connected to the second rotating shaft 602, and the second gear 606 meshes with the rack 8. The front end of the second rotating shaft 602 extends to the outside of the second connecting seat 601. A second sliding hole perpendicular to the axial direction is formed at one end of the second rotating shaft 602 located outside the second connecting seat 601. The second throttle 603 passes through the second sliding hole. The first throttle 504 and the second throttle 603 are both cylindrical and have the same diameter. Both ends of the first throttle 504 and the second throttle 603 are threaded with a second fixing head 21. The second fixing head 21 is spherical, and its outer diameter is larger than that of the first throttle 504. A positioning groove 22 is provided on the lower side of the lower pressure arm 20, and the position of the positioning groove 22 corresponds to the position of the second guide hole 17. The size of the positioning groove 22 matches the size of the first fixing head 19, allowing the first fixing head 19 to be vertically inserted into the positioning groove 22. When the lower pressure arm 20 moves downward and presses against the first fixing head 19 corresponding to the pin 18, the first fixing head 19 is inserted into the positioning groove 22, preventing the first fixing head 19 from shifting laterally and enhancing the stability of the pin 18.

[0043] A limiting component 7 is installed on the outer rear side of the second sliding sleeve 10. The limiting component 7 is used to prevent the second rotating shaft 602 from rotating when the second sliding sleeve 10 moves toward the base 1. The limiting component 7 includes a third connecting seat 701, a limiting pin 704, and a ratchet 706. The third connecting seat 701 is fixedly connected to the outer rear side of the second sliding sleeve 10. The third connecting seat 701 is located between the second throttle 603 and the second connecting seat 601. A third mounting cavity 714 is formed on the inner side of the third connecting seat 701. A fourth shaft hole 713 is formed on the third connecting seat 701 for the second rotating shaft 602 to pass through. The fourth shaft hole 713 communicates with the third mounting cavity 714. The second rotating shaft 602 passes through the fourth shaft hole 713; the ratchet 706 is fixedly connected to the second rotating shaft 602 and is located in the third mounting cavity 714; the upper side of the third connecting seat 701 is provided with a vertical first mounting hole 702, which communicates with the third mounting cavity 714; the lower section of the limiting pin 704 is integrally formed with a limiting ring 703, and the lower end of the limiting pin 704 is fixedly connected to a limiting pawl 705, which cooperates with the ratchet 706. A cover plate 707 is fixedly connected to the upper side of the third connecting seat 701. A second mounting hole 708 is provided on the cover plate 707, corresponding to the first mounting hole 702. The diameter of the second mounting hole 708 is smaller than that of the first mounting hole 702. A limiting pin 704 passes through the second mounting hole 708 and the first mounting hole 702. A compression spring 709 is provided in the first mounting hole 702, and the compression spring 709 is sleeved on the limiting pin 704. The upper end of the compression spring 709 abuts against the lower side of the cover plate 707, and the lower end of the compression spring 709 abuts against the upper side of the limiting ring 703. The limiting ring 703 is slidably connected to the first mounting hole 702. A slider 710 is fixedly connected to the outer side of the limiting ring 703. A first limiting groove 711 is provided on the inner side of the first mounting hole 702 for the slider 710 to slide vertically. The slider 710 is slidably connected within the first limiting groove 711. Two first limiting slide grooves 711 are symmetrically provided on the left and right sides. The plane formed by the two first limiting slide grooves 711 is perpendicular to the axial direction of the second rotating shaft 602. A second limiting slide groove 712 is provided circumferentially on the inner side of the first mounting hole 702 for the slider 710 to pass through. The two ends of the second limiting slide groove 712 are respectively connected to the two first limiting slide grooves 711. A blind hole is provided at the top of the guide rail 2. A top support 23 is threaded into the blind hole. The upper part of the top support 23 is located outside the blind hole. A first through hole is provided laterally on the top support 23 for the pin 18 to pass through. A second through hole is provided on the rear side of the first sliding sleeve 9. A fastening bolt 24 is threaded into the second through hole. The fastening bolt 24 is tightened against the guide rail 2 by engaging with the thread of the second through hole, thereby fixing the first sliding sleeve 9 on the guide rail 2.

[0044] Working principle: During drilling operations, motor 3 drives the core drill 4 to rotate via the transmission assembly, and the first drive assembly 5 drives the first sliding sleeve 9 to move towards the base 1, thereby driving the core drill 4 to drill through the rock strata. Drilling stops when the core drill 4 has drilled to a depth of one plate. Because the inner surface of the cutting teeth 12 protrudes from the inner surface of the core drill 4, the diameter of the drilled rock core is smaller than the inner diameter of the core drill 4, leaving a gap between the rock core and the inner wall of the core drill 4. The position of the core drill 4 is adjusted so that the first guide hole 16 and the second guide hole 17 are vertically aligned, allowing the lower end of the pin 18 to be inserted into the second guide hole 17. The wedge-shaped end of the pin 18 is then inserted into the gap between the rock core and the inner wall of the core drill 4. The second drive assembly 6 drives the lower pressure arm 20 to move towards the base 1, causing the lower pressure arm 20 to abut against the upper end of the pin 18, thus gradually pushing the lower end of the pin 18 deeper into the gap between the rock core and the inner wall of the core drill 4. Because the pin 18 is inserted into the gap between the rock core and the inner wall of the drill 4, the upper side of the rock core is compressed, causing it to break and making it easier to remove. Furthermore, because the pin 18 is firmly inserted into the gap between the rock core and the inner wall of the drill 4, the rock core is fixed inside the drill 4, making it easier to remove from the hole through the drill 4, thus improving construction efficiency.

[0045] When the position of the second sliding sleeve 10 on the guide rail 2 needs to be adjusted, the second rotating shaft 602 is rotated by the second throttle 603, which in turn drives the second gear 606 to rotate. The second gear 606 cooperates with the rack 8, causing the second connecting seat 601 to drive the second sliding sleeve 10 to move vertically along the guide rail 2, which in turn drives the lower pressure arm 20 to move vertically. Since it is easier to rotate the second rotating shaft 602 by the second throttle 603, it is easier to press the pin 18 downward by the lower pressure arm 20, thereby driving the lower end of the pin 18 to push into the gap between the core and the drill 4. Since the second sliding sleeve 10 is not constrained vertically, it is always in contact with the first sliding sleeve 9 due to gravity, which increases the power burden of adjusting the first sliding sleeve 9. Since the limiting component 7 prevents the second rotating shaft 602 from rotating when the second sliding sleeve 10 moves toward the base 1, the second sliding sleeve 10 can be fixed on the guide rail 2 away from the first sliding sleeve 9 when it is not necessary for the second sliding sleeve 10 to move toward the base 1, thereby avoiding the second sliding sleeve 10 from affecting the operation of the first sliding sleeve 9.

[0046] In the initial state, the limiting pawl 705 engages with the ratchet 706 to prevent the ratchet 706 from rotating forward, thereby preventing the second shaft 602 from rotating forward. Furthermore, because the second gear 606 meshes with the rack 8, it prevents the second sliding sleeve 10 from moving towards the base 1. When it is necessary to use the lowering arm 20 to push the pin 18 forward, the limiting pin 704 is lifted upward, causing the limiting pawl 705 to disengage from the ratchet 706, thus releasing the limitation of the limiting pawl 705 on the ratchet 706. This facilitates the second drive assembly 6 to drive the second sliding sleeve 10 towards the base 1, thereby facilitating the pushing operation of the fixed arm 11 on the pin 18. When the pin 18 is embedded in the gap between the rock core and the drill 4, and the rock core is broken, the limiting pin 704 is released. The limiting pin 704 resets under the action of the compression spring 709, thereby limiting the forward rotation of the ratchet 706. Because the slider 710 is slidably connected within the first limiting groove 711, it prevents the limiting pin 704 from rotating, facilitating the reset of the limiting pawl 705. When the drill is lifted by the first drive assembly 5, the barrel drill 4 rises, and simultaneously the pin 18 and the first sliding sleeve 9 rise. The first sliding sleeve 9 drives the second sliding sleeve 10 to move upward. Since the limiting pawl 705 does not restrict the ratchet 706 from rotating in the opposite direction, the second gear 606 can rotate when the second sliding sleeve 10 moves upward, thus ensuring that the second sliding sleeve 10 does not obstruct the upward movement of the first sliding sleeve 9, thereby smoothly lifting the core upward. When releasing the limiting pawl 705 from the ratchet 706, the limiting pin 704 needs to be lifted upward by hand. During the downward movement of the second sliding sleeve 10, the limiting pin 704 needs to be continuously lifted, making the operation cumbersome. In this design, since there are two first limiting slide grooves 711, the slider 710 is initially located in the first first limiting slide groove 711. When it is necessary to release the restriction of the limiting pawl 705 on the forward rotation of the ratchet 706, the limiting pin 704 is lifted upward, allowing the slider 710 to enter the second limiting slide groove 712. After the slider 710 enters the second limiting slide groove 712, the limiting pin 704 is rotated, thereby driving the slider 710 into the second first limiting slide groove 711. The limiting pin 704 is released, and after the limiting pin 704 is reset, the limiting pawl 705 restricts the reverse rotation of the ratchet 706, but does not restrict the forward rotation of the ratchet 706. This allows the second sliding sleeve 10 and the lower pressure arm 20 to move smoothly towards the base 1 without the need to continuously lift the limiting pin 704 upward by hand. When it is necessary to move the second sliding sleeve 10 upward, lift the limit pin 704 upward and rotate the limit pin 704 in the opposite direction, thereby restoring the limit pawl 705 to its initial state, thereby releasing the restriction on the reverse rotation of the ratchet 706 and changing it to the restriction on the forward rotation of the ratchet 706. The operation is simple and convenient.

[0047] During drilling, water is injected into the drill bit 4 to reduce its temperature and drilling resistance. During drilling, a large amount of gravel and debris is generated between the drill bit 4 and the rock strata, increasing frictional resistance and lifting resistance. Because the cutting teeth 12 protrude beyond the outer surface of the drill bit 4, the gap between the drill bit 4 and the borehole wall is larger, making it easier for water to carry the gravel and debris outwards from bottom to top. Furthermore, the presence of a spiral first wear-resistant strip 13 on the outside of the drill bit 4 agitates the gravel and debris on its outer side, discharging them upwards out of the hole, thus reducing the amount of gravel and debris between the drill bit 4 and the rock strata, further reducing drilling resistance and lowering the power consumption of the motor 3. Because a second wear-resistant strip 14 is provided on the inner side of the drill rig 4, and the spiral direction of the second wear-resistant strip 14 is opposite to that of the first wear-resistant strip 13, during drilling, the crushed stone and debris on the inner side of the drill rig 4 are continuously fed to the bottom by the second wear-resistant strip 14. The crushed stone and debris enter the outer side of the drill rig 4 through the gap between the cutting teeth 12 and the bottom of the drill rig 4, and are then carried to the ground by the first wear-resistant strip 13, increasing the efficiency of debris removal between the inner and outer sides of the drill rig 4 and the rock strata. When drilling with a water-cooled drill on site, scaffolding is usually used to fix the water-cooled drill to prevent it from tilting and thus preventing the drilling of a skewed hole. When fixing it with scaffolding or other support rods, the pin 18 is removed from the second guide hole 17 and inserted into the first through hole. The pin 18 drives the top support 23 to rotate, thereby causing the top support 23 to move upward and press against the scaffolding, thus fixing the water-cooled drill and preventing it from tilting.

[0048] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A water-cooled drill for manually excavated pile foundations, characterized in that: The device includes a base, a guide rail, a motor, and a drill bit. The guide rail is fixedly connected to the base, and a first sliding sleeve and a second sliding sleeve are slidably connected to the guide rail, with the second sliding sleeve located above the first sliding sleeve. A fixed arm is fixedly connected to the outside of the first sliding sleeve, and the drill bit is rotatably mounted on the fixed arm. The opening of the drill bit faces the base, and a plurality of cutting teeth are fixedly connected to the opening of the drill bit along the circumference of the drill bit. The inner surface of the cutting teeth protrudes from the inner surface of the drill bit. A mounting box is fixedly connected to the fixed arm. A transmission assembly is provided inside the mounting box. The motor is fixedly mounted on the mounting box. The motor drives the drill to rotate through the transmission assembly. The first sliding sleeve is provided with a first driving component, which is used to drive the first sliding sleeve to move vertically along the guide rail; The top of the drill bit has a first guide hole, the horizontal projection of which is located inside the drill bit and tangent to its inner wall; the fixed arm has a second guide hole, the horizontal projection of which is located on the movement trajectory of the first guide hole; a pin is slidably connected inside the second guide hole, the lower end of which is wedge-shaped. A pressure arm located directly above the second guide hole is fixedly connected to the outer side of the second sliding sleeve. A second drive assembly is installed on the second sliding sleeve, which is used to drive the second sliding sleeve to move vertically along the guide rail.

2. The water-cooled drill for manually excavated piles as described in claim 1, characterized in that: The second drive assembly includes a second connecting seat, a second rotating shaft, and a second throttle; a rack arranged longitudinally is fixedly connected to the guide rail; the second connecting seat is fixedly connected to the outside of the second sliding sleeve; a second mounting cavity is opened in the second connecting seat and communicates with the second sliding sleeve; a second shaft hole is opened laterally on the second connecting seat, and the second rotating shaft is rotatably connected in the second shaft hole; A second gear is fixedly connected to the second shaft, and the second gear meshes with the rack; one end of the second shaft extends to the outside of the second connecting seat, and a second sliding hole perpendicular to the axial direction is opened at the end of the second shaft located outside the second connecting seat, and the second throttle is inserted into the second sliding hole.

3. The water-cooled drill for manually excavated piles as described in claim 2, characterized in that: A limiting component is installed on the outer side of the second sliding sleeve, which is used to prevent the second rotating shaft from rotating when the second sliding sleeve moves toward the base.

4. The water-cooled drill for manually excavated piles as described in claim 3, characterized in that: The limiting assembly includes a third connecting seat, a limiting pin, and a ratchet; the third connecting seat is located between the second throttle and the second connecting seat, and a third mounting cavity is formed inside the third connecting seat; a second shaft hole is formed on the third connecting seat for the second rotating shaft to pass through, the second shaft hole communicating with the third mounting cavity, and the second rotating shaft passing through the second shaft hole; the ratchet is fixedly connected to the second rotating shaft and is located inside the third mounting cavity; a vertical first mounting hole is formed on the upper side of the third connecting seat, the first mounting hole communicating with the third mounting cavity; the lower section of the limiting pin is integrally formed with a limiting ring, and the lower end of the limiting pin is fixedly connected to a limiting pawl, the limiting... The pawl engages with the ratchet; a cover plate is fixedly connected to the upper side of the third connecting seat, and a second mounting hole is provided on the cover plate, which corresponds to the first mounting hole, and the diameter of the second mounting hole is smaller than that of the first mounting hole; the limiting pin passes through the second mounting hole and the first mounting hole, and a compression spring is provided in the first mounting hole, which is sleeved on the limiting pin, and the two ends of the compression spring abut against the cover plate and the limiting ring respectively; the limiting ring is slidably connected to the first mounting hole, and a slider is fixedly connected to the outside of the limiting ring; a first limiting groove is provided on the inner side of the first mounting hole for the slider to slide vertically, and the slider is slidably connected in the first limiting groove.

5. The water-cooled drill for manually excavated piles as described in claim 4, characterized in that: Two first limiting slide grooves are symmetrically provided, and the plane formed by the two first limiting slide grooves is perpendicular to the axis of the second rotating shaft; a second limiting slide groove for the slider to pass through is provided circumferentially inside the first mounting hole, and the two ends of the second limiting slide groove are respectively connected to the two first limiting slide grooves.

6. The water-cooled drill for manually excavated piles as described in claim 1, characterized in that: The outer side of the cutting tooth protrudes from the outer surface of the drill bit, and a first wear-resistant strip in a spiral shape arranged circumferentially is fixedly connected to the outer side of the drill bit. The outer surface of the first wear-resistant strip is flush with the outer surface of the cutting tooth.

7. The water-cooled drill for manually excavated piles as described in claim 6, characterized in that: A second wear-resistant strip, spirally arranged circumferentially, is fixedly connected to the inner side of the barrel drill. The spiral direction of the second wear-resistant strip is opposite to that of the first wear-resistant strip, and the inner surface of the second wear-resistant strip is flush with the inner surface of the cutting teeth.

8. The water-cooled drill for manually excavated piles as described in claim 1, characterized in that: The top of the guide rail is provided with a blind hole, and a top support is internally threaded into the blind hole. The upper section of the top support is located outside the blind hole, and a first through hole for the pin to pass through is provided on the top support laterally.

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