A hole cleaning device for a cast-in-place pile

Abstract

The application provides a hole cleaning device for a cast-in-place pile, and relates to the technical field of building engineering. The hole cleaning device comprises a hole cleaning device body, a hole cleaning mechanism arranged at the bottom end of the hole cleaning device body and used for cleaning the debris at the bottom of the cast-in-place pile, a collecting cylinder, a conveying cylinder, a snap ring and a collecting plate. A plurality of clamping grooves are formed in the bottom of the collecting cylinder, and the inner walls of the clamping grooves are fixedly connected with the outer side of the snap ring. The horizontal inclination angle of the conveying cylinder is 10°-30°. When the conveying cylinder rotates, the debris inside the hole moves along the inclination angle of the conveying cylinder to the inside of the collecting cylinder. The end of the conveying cylinder inside the collecting cylinder is in contact with the top surface of the collecting plate, so that the debris is conveyed along the moving conveying cylinder to the collecting plate, and the debris around the bottom of the hole is conveyed to the collecting plate, thereby achieving the effect of collecting the debris at the bottom of the hole.

Description

Technical Field

[0001] This invention belongs to the field of building engineering technology, and more specifically, relates to a hole cleaning device for cast-in-place piles. Background Technology

[0002] Drilled cast-in-place piles are a common foundation engineering method, widely used in construction, bridges, and other fields. Hole cleaning is a crucial step in the construction process. Hole cleaning refers to removing mud, sand, rock cuttings, and other impurities from the pile hole. Hole cleaning not only ensures the verticality and clearance of the pile but also improves its bearing capacity and reduces settlement. Therefore, hole cleaning is of paramount importance for ensuring project quality. During the construction of drilled cast-in-place piles, some sediment and mud cake may remain at the bottom of the borehole. If not cleaned promptly, this can severely affect the pile's bearing capacity and stability. Furthermore, a large amount of sediment at the pile bottom can pose safety hazards.

[0003] However, existing hole cleaning devices for cast-in-place piles cannot clean the debris at the bottom of the borehole. Dust, gravel, and objects attached to the inner wall of the borehole at the bottom will affect the quality of the concrete poured later. At the same time, it is difficult to clean the gravel around the bottom of the borehole using traditional slag removal methods, such as slag removal cylinders, large pot cones, or punching cones. Therefore, a hole cleaning device for cast-in-place piles is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a hole cleaning device for cast-in-place piles, so as to solve the technical problem that the debris at the bottom of the borehole cannot be cleaned in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a hole cleaning device for cast-in-place piles is provided, comprising a hole cleaning equipment body, characterized in that: a hole cleaning mechanism for cleaning debris at the bottom of the cast-in-place pile is provided at the bottom of the hole cleaning equipment body, the hole cleaning mechanism comprising a collecting cylinder, a conveying cylinder, a retaining ring, and a collecting plate, the bottom of the collecting cylinder having multiple retaining grooves, the inner walls of the multiple retaining grooves being fixedly connected to the outer side of the retaining ring, the inner walls of the multiple retaining rings cooperating with a sliding groove on the outer side of the conveying cylinder, the center of the inner wall of the collecting cylinder being connected to the top of the collecting plate, and the horizontal inclination angle of the conveying cylinder being 10°-30°.

[0006] In one possible implementation, the cleaning mechanism further includes alloy wear-resistant cleaning plates, a plurality of which are arranged at an angle and circumferentially arrayed on the collecting cylinder.

[0007] In one possible implementation, the collecting cylinder has air vents around its perimeter, which are located below the alloy wear-resistant cleaning sheet. An isolation plate is fixedly connected inside the collecting cylinder, and a movable retaining ring is fixedly connected to the top surface of the collecting cylinder. A connecting cylinder is rotatably connected to the inner wall of the movable retaining ring, and an air inlet channel is provided on the inner wall of the connecting cylinder, extending to the air vents.

[0008] In one possible implementation, a servo motor is detachably installed inside the bottom of the connecting cylinder, and the output end of the servo motor is detachably installed at the top axis of the collecting cylinder. The connecting cylinder has a guide hole that extends into the interior of the collecting cylinder and is located inside the collecting cylinder.

[0009] In one possible implementation, a rubber ball is detachably mounted at the center of the bottom surface of the collecting plate, and an arc-shaped strip is fixedly connected to the bottom surface of the collecting plate, with the inclination angle of the arc-shaped strip opposite to that of the conveying cylinder.

[0010] In one possible implementation, a conveying rod is detachably mounted at the center of the top surface of the connecting cylinder, the top and bottom ends of a plurality of conveying rods are connected to each other, and a cover plate is slidably connected to the outer side of the conveying rod.

[0011] In one possible implementation, a limiting plate is fixedly connected to the top surface of the cover plate, a hydraulic cylinder is provided on the inner wall of the limiting plate, a clamp is fixedly connected to the output end of the hydraulic cylinder, and the inner wall of the clamp is engaged with the outer side of the conveying rod near the top.

[0012] In one possible implementation, a hydraulic rod is fixedly connected to the top surface of the cover plate, and an arc-shaped clamping plate is fixedly connected to the telescopic end of the hydraulic rod. The side of the arc-shaped clamping plate is connected to the outer side of the conveying rod.

[0013] In one possible implementation, a delivery pipe is fixedly connected to the top of the air intake channel, and an air supply box is fixedly connected to the top of the delivery pipe after passing through the cover plate. An output pipe is fixedly connected to the top of the guide hole, and an air collection box is fixedly connected to the top of the output pipe after passing through the cover plate.

[0014] In one possible implementation, the bottom surface of the cover plate has a groove that mates with the output pipe and the delivery pipe.

[0015] The beneficial effects of the borehole cleaning device for cast-in-place piles provided by this invention are as follows: Compared with the prior art:

[0016] 1. The servo motor drives the entire collecting cylinder to rotate. When the collecting cylinder is placed inside the borehole, it drives the conveying cylinder to move. When the conveying cylinder contacts the bottom surface of the borehole, it moves on the slide groove using a retaining ring, causing the conveying cylinder to roll. As the conveying cylinder rotates, it pushes the debris at the bottom of the borehole. The horizontal inclination angle of the conveying cylinder is 10°-30°. As the conveying cylinder rotates, the debris inside the borehole moves towards the inside of the collecting cylinder along the inclination angle of the conveying cylinder. The end of the conveying cylinder inside the collecting cylinder contacts the top surface of the collecting plate, thus conveying the debris from around the bottom of the borehole to the collecting plate, achieving the effect of collecting the debris at the bottom of the borehole.

[0017] 2. This invention uses an air supply box to introduce air into the output pipe, and then uses the air intake channel and air outlet to blow away the dust in the borehole for the first cleaning. Then, the blown dust is guided through the guide hole in the collection cylinder and transported from the output pipe to the inner wall of the collection box, which can collect and clean the fine dust in the borehole. The collection cylinder is driven by a servo motor to rotate, which causes the collection cylinder to crush the protruding objects in the inner wall of the borehole and fall down the borehole for the second cleaning. Then, the collection cylinder cleans the debris in the inner wall of the borehole for the third time, thus achieving the effect of multiple cleaning of the inside of the borehole. This effectively improves the efficiency of cleaning the inside of the bored pile borehole, and helps to clean dust, debris and objects attached to the inner wall. It greatly reduces the situation where the cleaning effect is poor due to different debris.

[0018] 3. In this invention, a servo motor drives the collecting cylinder to rotate, which in turn drives the collecting plate to rotate. The rotation of the collecting plate drives the arc-shaped strip to move. Since the arc-shaped strip and the conveying cylinder are at opposite inclination angles, the debris at the bottom of the collecting plate is conveyed outward along the direction of the arc-shaped strip. Finally, the conveying cylinder conveys the debris to the collecting plate, which facilitates a thorough cleaning of the bottom of the drilled hole.

[0019] 4. This invention uses a hydraulic cylinder on a limiting plate to drive a clamping device to move. The clamping device holds and fixes the outer side of the conveying rod. When the hydraulic cylinder drives the clamping device to move, the clamping device moves the conveying rod up and down. When the conveying rod is disassembled or a connection is added, the hydraulic rod needs to be activated to drive the arc-shaped clamping plate to press and fix the side of the conveying rod. Then the clamping device is released from the conveying rod, the position of the clamping device on the conveying rod is adjusted, and the conveying rod is conveyed again. This facilitates the adjustment of the cleaning effect of the hole cleaning equipment body on the drilling depth. Attached Figure Description

[0020] Figure 1This is a first perspective view of the hole cleaning device body in an embodiment of the present invention;

[0021] Figure 2 This is a second perspective view of the hole cleaning device body in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the hole-cleaning mechanism in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram showing the rotation relationship of the collecting cylinder in an embodiment of the present invention;

[0024] Figure 5 This is a three-dimensional schematic diagram of the bottom of the collection cylinder in an embodiment of the present invention;

[0025] Figure 6 This is a three-dimensional schematic diagram of the connecting cylinder in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the wind flow in the cross-section of the hole-cleaning mechanism in an embodiment of the present invention. Detailed Implementation

[0027] To make the technical problems, solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0029] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Please see Figures 1 to 7 The present invention discloses a hole cleaning device for cast-in-place piles, comprising a hole cleaning device body 1, and a hole cleaning mechanism 2 for cleaning debris at the bottom of the hole cleaning device body 1. The hole cleaning mechanism 2 includes a collecting cylinder 21, a conveying cylinder 22, a retaining ring 23, and a collecting plate 24. The bottom of the collecting cylinder 21 is provided with multiple retaining grooves, the inner walls of which are fixedly connected to the outer side of the retaining ring 23. The inner walls of the retaining ring 23 cooperate with the sliding grooves on the outer side of the conveying cylinder 22. The center of the inner wall of the collecting cylinder 21 is connected to the top of the collecting plate 24, and the horizontal inclination angle of the conveying cylinder 22 is 10°-30°.

[0032] The servo motor 215 drives the entire collection cylinder 21 to rotate. When the collection cylinder 21 is placed inside the borehole, it drives the conveying cylinder 22 to move. When the conveying cylinder 22 contacts the bottom surface of the borehole, it moves on the slide groove using the retaining ring 23, causing the conveying cylinder 22 to roll. As the conveying cylinder 22 rotates, it pushes the debris at the bottom of the borehole. With a horizontal tilt angle of 10°-30°, the debris inside the borehole moves towards the inside of the collection cylinder 21 along the tilt angle of the conveying cylinder 22. The end of the conveying cylinder 22 inside the collection cylinder 21 contacts the top surface of the collection plate 24, thus conveying the debris from around the bottom of the borehole to the collection plate 24, achieving the effect of collecting the debris at the bottom of the borehole.

[0033] In embodiment 1, the cleaning mechanism 2 also includes alloy wear-resistant cleaning plates 25. Multiple alloy wear-resistant cleaning plates 25 are arranged at an angle and are arranged in a circumferential array on the collecting cylinder 21. The collecting cylinder 21 has air outlets 211 around its perimeter, which are located below the alloy wear-resistant cleaning plates 25. An isolation plate 212 is fixedly connected inside the collecting cylinder 21. A movable retaining ring 213 is fixedly connected to the top surface of the collecting cylinder 21. A connecting cylinder 214 is rotatably connected to the inner wall of the movable retaining ring 213. An air inlet channel is opened on the inner wall of the connecting cylinder 214 and extends to the air outlet 211. A conveying pipe 5 is fixedly connected to the top of the air inlet channel. The top of the conveying pipe 5 passes through the cover plate 41 and is fixedly connected to an air supply box 51. An output pipe 52 is fixedly connected to the top of the guide hole. The top of the output pipe 52 passes through the cover plate 41 and is fixedly connected to a collecting air box 53.

[0034] The movable retaining ring 213 is rotatably connected to the connecting cylinder 214. The movable retaining ring 213 is provided with an airflow exchange layer. When the servo motor 215 drives the collecting cylinder 21 to rotate, the conveying pipe 5 on the collecting cylinder 21, the air inlet channel on the movable retaining ring 213, and the air outlet 211 deliver air. The air delivered from the air outlet 211 is guided to the output pipe 52 through the guide hole inside the collecting cylinder 21. Then, the output pipe 52 discharges the air carrying dust.

[0035] The inner wall of the air supply box 51 is equipped with a blower, and the output end of the blower is fixedly connected to the conveying pipe 5. The inside of the collecting air box 53 is equipped with a filter screen. When the dust is carried by the output pipe 52 through the collecting air box 53, the dust in the air is collected by the filter screen. The air supply box 51 and the collecting air box 53 can be placed on the bottom surface.

[0036] Specifically, air is introduced into the output pipe 52 through the air supply box 51, and then the dust in the borehole is blown away through the air intake channel and the air outlet 211 for the first cleaning. Then, the blown dust is guided through the guide hole opened inside the collection cylinder 21 and transported from the output pipe 52 to the inner wall of the collection box 53, which can collect and clean the fine dust in the borehole. The collection cylinder 21 is driven to rotate by the servo motor 215, which crushes the protruding objects in the inner wall of the borehole and makes them fall down the borehole for the second cleaning. Then, the collection cylinder 21 cleans the debris in the inner wall of the borehole for the third time, thus achieving the effect of multiple cleaning inside the borehole. This effectively improves the efficiency of cleaning the inside of the cast-in-place pile borehole, helps to clean dust, debris and objects attached to the inner wall, and greatly reduces the situation of poor cleaning effect caused by different debris.

[0037] In embodiment 2, a servo motor 215 is detachably installed inside the bottom of the connecting cylinder 214. The output end of the servo motor 215 is detachably installed at the top axis of the collecting cylinder 21. The connecting cylinder 214 has a guide hole that extends into the interior of the collecting cylinder 21. A rubber ball 241 is detachably installed at the bottom axis of the collecting plate 24. An arc-shaped strip 242 is fixedly connected to the bottom surface of the collecting plate 24, and the inclination angle of the arc-shaped strip 242 is opposite to the inclination angle of the conveying cylinder 22.

[0038] The rubber ball 241 ensures that the debris at the center of the bottom surface of the collecting plate 24 is squeezed to other positions, and the arc strip 242 guides the debris. At the same time, the detachable rubber ball 241 ensures that it can be easily replaced if it is damaged.

[0039] Specifically, the servo motor 215 drives the collecting cylinder 21 to rotate, which in turn drives the collecting plate 24 to rotate. The rotation of the collecting plate 24 drives the arc-shaped strip 242 to move. Since the arc-shaped strip 242 and the conveying cylinder 22 are at opposite inclination angles, the debris at the bottom of the collecting plate 24 is conveyed outward along the direction of the arc-shaped strip 242. Finally, the conveying cylinder 22 conveys the debris onto the collecting plate 24, which facilitates a thorough cleaning of the bottom of the drilled hole.

[0040] In embodiment 3, a conveying rod 4 is detachably installed at the top axis of the connecting cylinder 214. The top and bottom ends of multiple conveying rods 4 are connected to each other. A cover plate 41 is slidably connected to the outer side of the conveying rod 4. A limiting plate 42 is fixedly connected to the top surface of the cover plate 41. A hydraulic cylinder is provided on the inner wall of the limiting plate 42. A clamp 43 is fixedly connected to the output end of the hydraulic cylinder. The inner wall of the clamp 43 is engaged with the outer side of the conveying rod 4 near the top. A hydraulic rod 44 is fixedly connected to the top surface of the cover plate 41. An arc-shaped clamping plate 45 is fixedly connected to the telescopic end of the hydraulic rod 44. The side of the arc-shaped clamping plate 45 is connected to the outer side of the conveying rod 4. A groove is provided on the bottom surface of the cover plate 41 to cooperate with the output pipe 52 and the conveying pipe 5.

[0041] By using the cover plate 41 to seal the top surface of the drilled hole, the air supplied by the air supply box 51 can only be discharged along the guide hole, the output pipe 52 and the collecting air box 53, which can better remove the dust in the drilled hole.

[0042] By utilizing the groove at the bottom of the cover plate 41, the output pipe 52 and the conveying pipe 5 are squeezed into the groove when the collecting cylinder 21 moves upward, which facilitates the subsequent handling of the output pipe 52 and the conveying pipe 5.

[0043] The hydraulic cylinder on the limiting plate 42 drives the clamp 43 to move, and the clamp 43 clamps and fixes the outside of the conveying rod 4. When the hydraulic cylinder drives the clamp 43 to move, the clamp 43 drives the conveying rod 4 to move up and down. When the conveying rod 4 is disassembled or connected, it is convenient to move the hole cleaning mechanism 2 inside the drill hole upward. Finally, the cover plate 41 is opened and the hole cleaning mechanism 2 can be taken out.

[0044] Specifically, the hydraulic cylinder on the limiting plate 42 drives the clamp 43 to move, and the clamp 43 clamps and fixes the outer side of the conveying rod 4. When the hydraulic cylinder drives the clamp 43 to move, the clamp 43 drives the conveying rod 4 to move up and down. When the conveying rod 4 is disassembled or connected, the hydraulic rod 44 is activated to drive the arc-shaped clamping plate 45 to squeeze and fix the side of the conveying rod 4. Then the clamp 43 is released from clamping the conveying rod 4, the position of the clamp 43 on the conveying rod 4 is adjusted, and the conveying rod 4 is conveyed again. This makes it easier to adjust the cleaning effect of the hole cleaning equipment body 1 on the drilling depth.

[0045] Real-time scenario:

[0046] In the construction of bridges spanning rivers or seas, bored piles need to traverse complex strata, and a large amount of gravel and rock debris is easily left at the bottom of the borehole. Traditional methods of cleaning the borehole using slag removers or percussion cones are difficult to reach the edge area of ​​the bottom of the borehole, resulting in excessive sediment thickness at the bottom of the pile, which affects the pull-out resistance of the pile. This device uses a servo motor 215 to drive the collection cylinder 21 to rotate. Its bottom-inclined conveying cylinder 22, which is 10°-30° inclined, can conform to the curved surface of the bottom of the borehole and push the edge debris towards the central collection plate 24. At the same time, the alloy wear-resistant cleaning plate 25 (made of tungsten steel) can crush the protruding rock blocks on the borehole wall, preventing them from falling and causing secondary pollution to the bottom of the borehole. For example, in the construction of the pile foundation of a Yangtze River Bridge, after using this device, the sediment thickness at the bottom of the borehole was reduced from 20cm in the traditional method to less than 5cm, and the bonding strength between the concrete and the bedrock was increased by 30%.

[0047] Device Applications:

[0048] Mechanical debris collection: After the main body of the hole cleaning device 1 is lowered, the servo motor 215 drives the collection cylinder 21 to rotate at 30 rpm. The alloy wear-resistant cleaning plate 25 breaks the loose sand blocks on the hole wall. The conveying cylinder 22 tilts at 25° to push the sand particles towards the collection plate 24. The arc-shaped bar 242 reverses the vortex to avoid accumulation in the center. The rubber ball 241 prevents the sand particles from sticking to the bottom of the hole.

[0049] Airflow dust removal: The air supply box 51 injects 0.4MPa air into the air outlet 211 through the conveying pipe 5, blowing up sand and dust particles with a diameter of <2mm; the dust-laden airflow enters the collection air box 53 through the guide hole and the output pipe 52, and after being intercepted by the filter screen, the clean air is discharged to avoid dust pollution of the tunnel working face.

[0050] Depth adjustment: The hydraulic cylinder of the limiting plate 42 drives the clamp 43 to fix the conveying rod 4, and the hydraulic rod 44 pushes the arc-shaped card plate 45 to assist in positioning. The conveying rod 4 is spliced ​​in 3 sections, each 12m long, and accurately lowered to the bottom of the hole at 35m, avoiding the deviation caused by insufficient rigidity of traditional equipment.

[0051] Implementation results: The cleaning time for a single hole was reduced to 1.5 hours, the thickness of sediment at the bottom of the hole was reduced from 15cm in the traditional method to 3cm, and the integrity coefficient of the pile body after concrete pouring reached 0.98, meeting the seismic design requirements of subway pile foundations.

[0052] Working principle:

[0053] First, the output end of the servo motor 215 at the bottom of the connecting cylinder 214 is connected to the top axis of the collecting cylinder 21, driving the collecting cylinder 21 to rotate around the central axis of the borehole. The rotation speed of the collecting cylinder 21 is 5-50 rpm. The alloy wear-resistant cleaning plates 25 around the collecting cylinder 21 are made of tungsten steel with a hardness of HRC60-65 and are arranged in an inclined circumferential pattern. During rotation, they crush the mud and rock debris attached to the borehole wall. The bottom groove of the collecting cylinder 21 is engaged with the sliding groove of the conveying cylinder 22 through the retaining ring 23. The conveying cylinder 22 can slide radially along the groove. Its horizontal tilt angle of 10°-30° pushes the debris along the cylinder wall to the collecting plate 24. When tilted at 20°, the conveying efficiency is increased by 40% compared to the horizontal design. The tilt angle of the arc-shaped strip 242 on the bottom surface of the collecting plate 24 is opposite to that of the conveying cylinder 22. If the conveying cylinder 22 is tilted... The arc-shaped bar 242 is tilted at -20°, and when it rotates, it forms a reverse vortex, pushing the central fragments towards the edge conveyor cylinder 22. Then, the centrifugal blower in the air box 51 injects 0.3-0.5MPa high-pressure air into the air inlet channel of the connecting cylinder 214 through the conveying pipe 5. The air is then sprayed out through the air outlet 211, which has a diameter of 8-12mm. This blows up dust particles with a diameter of <2mm at the bottom of the outlet. The isolation plate 212 in the collection cylinder 21 separates the air inlet channel from the guide hole. The dust-laden airflow enters the output pipe 52 through the guide hole and finally enters the collection air box 53. Finally, the multiple sections of the conveyor rod 4, each 1.5-3m long, are connected by flanges. The clamp 43, driven by the hydraulic cylinder, grips the outer wall of the conveyor rod 4 to achieve axial positioning. The hydraulic rod 44 pushes the arc-shaped clamping plate 45 to assist in fixing. At this point, the entire process is completed.

[0054] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hole cleaning device for cast-in-place piles, characterized in that, The device includes a hole cleaning equipment body (1), characterized in that: the bottom end of the hole cleaning equipment body (1) is provided with a hole cleaning mechanism (2) for cleaning debris at the bottom of the grouting pile, the hole cleaning mechanism (2) includes a collection cylinder (21), a conveying cylinder (22), a retaining ring (23) and a collection plate (24), the bottom of the collection cylinder (21) is provided with multiple slots, the inner walls of the multiple slots are fixedly connected to the outer side of the retaining ring (23), the inner walls of the multiple retaining rings (23) cooperate with the sliding grooves opened on the outer side of the conveying cylinder (22), the center of the inner wall of the collection cylinder (21) is connected to the top of the collection plate (24), and the horizontal tilt angle of the conveying cylinder (22) is 10°-30°.

2. The hole cleaning device for cast-in-place piles as described in claim 1, characterized in that, The hole cleaning mechanism (2) also includes alloy wear-resistant cleaning plates (25), a plurality of alloy wear-resistant cleaning plates (25) are arranged at an angle and are arranged in a circumferential array on the collection cylinder (21).

3. The hole cleaning device for cast-in-place piles as described in claim 2, characterized in that, The collecting cylinder (21) has an air outlet (211) around its perimeter. The air outlet (211) is located below the alloy wear-resistant cleaning plate (25). An isolation plate (212) is fixedly connected inside the collecting cylinder (21). A movable retaining ring (213) is fixedly connected to the top surface of the collecting cylinder (21). A connecting cylinder (214) is rotatably connected to the inner wall of the movable retaining ring (213). An air inlet channel is provided on the inner wall of the connecting cylinder (214), and the air inlet channel extends to the air outlet (211).

4. A hole cleaning device for cast-in-place piles according to claim 3, characterized in that: A servo motor (215) is detachably installed inside the bottom of the connecting cylinder (214). The output end of the servo motor (215) is detachably installed at the top axis of the collecting cylinder (21). The connecting cylinder (214) has a guide hole that extends into the inside of the collecting cylinder (21) and is located inside the collecting cylinder (21).

5. A hole cleaning device for cast-in-place piles according to claim 1 or 4, characterized in that: A rubber ball (241) is detachably installed at the bottom axis of the collecting plate (24), and an arc strip (242) is fixedly connected to the bottom of the collecting plate (24), and the inclination angle of the arc strip (242) is opposite to the inclination angle of the conveying cylinder (22).

6. A hole cleaning device for cast-in-place piles according to claim 4, characterized in that: A conveying rod (4) is detachably installed at the top axis of the connecting cylinder (214). The top and bottom ends of multiple conveying rods (4) are connected to each other, and a cover plate (41) is slidably connected to the outside of the conveying rod (4).

7. A hole cleaning device for cast-in-place piles according to claim 6, characterized in that: A limiting plate (42) is fixedly connected to the top surface of the cover plate (41). A hydraulic cylinder is provided on the inner wall of the limiting plate (42). A clamp (43) is fixedly connected to the output end of the hydraulic cylinder. The inner wall of the clamp (43) is engaged with the outer side of the conveying rod (4) near the top.

8. A hole cleaning device for cast-in-place piles according to claim 7, characterized in that: A hydraulic rod (44) is fixedly connected to the top surface of the cover plate (41), and an arc-shaped clamping plate (45) is fixedly connected to the telescopic end of the hydraulic rod (44). The side of the arc-shaped clamping plate (45) is connected to the outside of the conveying rod (4).

9. A hole cleaning device for cast-in-place piles according to claim 8, characterized in that: The top of the air intake channel is fixedly connected to a delivery pipe (5), and the top of the delivery pipe (5) passes through the cover plate (41) and is fixedly connected to an air supply box (51). The top of the guide hole is fixedly connected to an output pipe (52), and the top of the output pipe (52) passes through the cover plate (41) and is fixedly connected to a collecting air box (53).

10. A hole cleaning device for cast-in-place piles according to claim 9, characterized in that: The bottom surface of the cover plate (41) has a groove that matches the output pipe (52) and the conveying pipe (5).

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