A device for cleaning a borehole of a cast-in-place pile

Abstract

The application discloses a bored pile hole cleaning device, and relates to a hole cleaning device. The device comprises a sand pump and a recovery tank. The end of the extraction pipe is provided with a cyclone material loosening assembly for loosening the sand at the bottom of the bored pile hole. The recovery tank is provided with a vibrating screen assembly. The bottom of the recovery tank is provided with a recovery pipe with variable length. The two sides of the bored pile hole are provided with symmetrically arranged motor winding assemblies. A filling assembly for filling the mud at the missing position of the bored pile hole wall is movably arranged in the bored pile hole. The filling assembly is connected with the winding ends of the two motor winding assemblies. The recovery pipe is connected with the filling assembly. The application can fill the pits on the bored pile hole wall, and has reasonable and reliable structure and high hole cleaning efficiency.

Description

A hole cleaning device for cast-in-place piles Technical Field

[0001] This invention relates to a hole cleaning device, and more specifically, to a hole cleaning device for cast-in-place piles. Background Technology

[0002] Cast-in-place piles are piles formed in the foundation soil by means of mechanical drilling, steel pipe extrusion, or manual excavation on the engineering site, and then a steel cage is placed inside and concrete is poured in. Controlling the thickness of the sediment at the bottom of the casting-in-place pile cleaning device is one of the important indicators of the quality of the bored cast-in-place pile. Therefore, removing the sediment at the bottom of the casting-in-place pile cleaning device is one of the important links in controlling the quality of the cast-in-place pile.

[0003] In the prior art, a borehole cleaning device for bored piles, disclosed in publication number CN115012416A, employs a recycling mechanism to achieve mud recycling, thereby reducing underground mud waste. However, in on-site construction, the amount of mud in the bored pile hole is generally not much, usually less than half full. Furthermore, the missing areas (i.e., pits) on the borehole wall typically extend from the top to the bottom. Moreover, due to the relatively loose upper soil layer, the upper wall of the bored pile hole is prone to loosening and soil loss during drilling due to mechanical vibration, resulting in numerous small pits. If these pits are not repaired in time, they will grow larger due to mechanical vibration during subsequent construction. While the prior art achieves mud recycling, it cannot fill the portions of the bored pile hole that are not immersed in mud. Therefore, improvements are needed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a hole cleaning device for cast-in-place piles, which addresses the shortcomings of the prior art and solves the problem that the prior art cannot fill the part of the cast-in-place pile hole that is not soaked in mud.

[0005] The present invention discloses a hole cleaning device for cast-in-place piles, comprising a sand and gravel pump and a recovery tank; the sand and gravel pump is mounted above the cast-in-place pile hole via a bracket, the recovery tank is mounted on one side of the cast-in-place pile hole, an extraction pipe extending into the cast-in-place pile hole is installed at the input end of the sand and gravel pump, and an output pipe extending above the recovery tank is installed at the output end of the sand and gravel pump; a cyclone loosening component for loosening sand and gravel at the bottom of the cast-in-place pile hole is installed at the end of the extraction pipe; a vibrating screening component is installed in the recovery tank, and a recovery pipe of variable length is provided at the bottom of the recovery tank; symmetrically arranged motor winding components are installed on both sides of the cast-in-place pile hole, and a filling component for filling missing parts of the cast-in-place pile hole wall with mud is movably arranged in the cast-in-place pile hole, the filling component is connected to the winding ends of the two motor winding components, and the recovery pipe is connected to the filling component.

[0006] The filling assembly includes an upper seat, a middle seat, and a lower seat; the upper seat has a mud storage chamber, and a mud inlet connected to a recovery pipe is provided above the mud storage chamber; the middle seat has a mud outlet channel, and a pressure valve is installed in the mud outlet channel; the lower seat has a mud spraying channel, and the mud spraying channel faces the wall of the grouting pile hole; the circumferential sidewall of the middle seat is in contact with the wall of the grouting pile hole, and the diameters of the upper seat and the lower seat are both smaller than the diameter of the middle seat.

[0007] The connections between the upper and lower seats and the middle seat are all rounded.

[0008] A weighted lead block is installed below the lower seat.

[0009] The upper seat, middle seat, and lower seat are an integral structure, and each of the upper seat, middle seat, lower seat, and weighted lead block has a through hole for inserting the extraction tube, and a protective sleeve is installed in the through hole.

[0010] The recovery pipe consists of two rigid pipe sections and one corrugated pipe section; the corrugated pipe section is located between the two rigid pipe sections; a sludge pump is installed at the end of the recovery pipe that connects to the recovery tank.

[0011] The motor winding assembly includes a geared motor, a winding shaft, a winding wheel, and a steel cable. The geared motor is fixedly installed on the ground on one side of the grouting pile hole. The winding shaft is fixedly installed on the output end of the geared motor. The winding wheel is fixedly installed on the winding shaft. One end of the steel cable is wound around the winding wheel. Two symmetrically arranged lifting rings are welded on the upper body. The other end of the steel cable is fixedly tied to the lifting rings.

[0012] The cyclone loosening assembly includes a slip ring, a stirring cylinder, and multiple stirring frames evenly installed on the outer wall of the stirring cylinder; one end of the slip ring is installed at the end of the extraction tube, the stirring cylinder is installed at the other end of the slip ring, and the end of the stirring cylinder away from the slip ring is provided with a stirring tooth one; the bottom of the stirring frame is fixedly provided with a stirring tooth two.

[0013] An air pump is installed on the bracket. The air pump is connected to the air inlet end of the air slip ring through an air supply pipe. An exhaust pipe is installed at the air outlet end of the air slip ring and extends to the outside of the grouting pile hole.

[0014] The vibrating screening assembly includes a servo motor, a cam, a first slider, a second slider, a mounting plate, a spring, a first screen plate, and a second screen plate. The first slider is slidably mounted on one side of the recycling tank, and the second slider is slidably mounted on the other side of the recycling tank. The first screen plate and the second screen plate are mounted between the two sliders and are arranged at an angle. The servo motor is mounted on the side wall of the recycling tank, and the cam is fixedly mounted on the output end of the servo motor. The cam is in contact with the first slider. The mounting plate is fixedly mounted on the side wall of the recycling tank, and one end of the spring is fixedly connected to the mounting plate, while the other end of the spring is fixedly connected to the second slider.

[0015] Beneficial effects

[0016] The advantages of this invention are:

[0017] 1. The sand and gravel at the bottom of the grouting pile hole is loosened by the air cyclone loosening assembly consisting of air slip ring, agitator and agitator frame, so that the extraction pipe can better extract the sand and gravel, which can effectively improve the hole cleaning efficiency.

[0018] 2. The vibrating screening assembly with two screen plates is adopted, and the screen plates have a reciprocating movement effect through the setting of cam and slider, which not only improves the screening effect of sand and gravel slurry, but also improves the screening efficiency.

[0019] 3. The screened mud is sprayed onto the wall of the cast-in-place pile hole through the filling component to fill the pits on the wall of the cast-in-place pile hole; the filling component is driven by the motor winding component to move in the cast-in-place pile hole to level the wall of the cast-in-place pile hole, making the wall of the cast-in-place pile hole smoother, and at the same time, it can also squeeze the mud in the pits to reduce the amount of mud flowing out of the pits. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the hole cleaning device of the present invention;

[0021] Figure 2 is a schematic diagram of the internal structure of the filling component of the present invention;

[0022] Figure 3 is a schematic diagram of the structure of the recycling pool located on the discharge side of the vibrating screen assembly of the present invention;

[0023] Figure 4 is a schematic diagram of the structure after the installation plate in Figure 3 has been removed;

[0024] Figure 5 is a schematic diagram of the cross-sectional structure at point AA in Figure 3;

[0025] Figure 6 is a partial structural schematic diagram of the extraction tube of the present invention.

[0026] Among them: 1-grouting pile hole, 2-support, 3-sand and gravel pump, 4-extraction pipe, 5-air slip ring, 6-stirring cylinder, 7-stirring tooth one, 8-stirring frame, 9-stirring tooth two, 10-output pipe, 11-recovery pool, 12-recovery pipe, 13-filling component, 14-gear motor, 15-rewinding shaft, 16-rewinding wheel, 17-steel cable, 18-air pump, 19-air supply pipe, 20-mud pump, 21-servo motor, 22-cam, 23-first slider, 24-second slider, 25- - First screen plate, 26- Second screen plate, 27- Mounting plate, 28- Spring, 41- Steel pipe, 42- Corrugated pipe, 43- Positioning strip, 44- Positioning ring, 121- Rigid pipe section, 122- Corrugated pipe section, 130- Upper seat body, 131- Intermediate seat body, 132- Lower seat body, 133- Mud inlet, 134- Mud storage chamber, 135- Mud outlet channel, 136- Pressure valve, 137- Mud spraying channel, 138- Weighted lead block, 139- Through hole, 140- Protective sleeve, 141- Lifting ring. Detailed Implementation

[0027] The present invention will be further described below with reference to embodiments, but this does not constitute any limitation on the present invention. Any limited modifications made by any person within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0028] Referring to Figures 1-6, a hole cleaning device for cast-in-place piles according to the present invention includes a sand and gravel pump 3 and a recovery tank 11. The sand and gravel pump 3 is installed above the cast-in-place pile hole 1 via a bracket 2, and the recovery tank 11 is installed on one side of the cast-in-place pile hole 1. An extraction pipe 4 extending into the cast-in-place pile hole 1 is installed at the input end of the sand and gravel pump 3, and a cyclone loosening component for loosening the sand and gravel at the bottom of the cast-in-place pile hole 1 is installed at the end of the extraction pipe 4 so that the extraction pipe 4 can better extract the sand and gravel.

[0029] The cyclone loosening assembly of this embodiment includes an air slip ring 5, an agitator 6, and multiple agitator frames 8 uniformly installed on the outer wall of the agitator 6. One end of the air slip ring 5 is installed at the end of the extraction pipe 4, and the agitator 6 is installed at the other end of the air slip ring 5. The end of the agitator 6 away from the air slip ring 5 is provided with agitator teeth 7. Agitator teeth 9 are fixedly provided at the bottom of the agitator frame 8. An air pump 18 is installed on the bracket 2 above the grouting pile hole 1. The air pump 18 is connected to the air inlet end of the air slip ring 5 through an air supply pipe 19. An exhaust pipe is installed at the air outlet end of the air slip ring 5, and the exhaust pipe extends to the outside of the grouting pile hole 1.

[0030] When the air pump 18 supplies gas to the air slip ring 5, the air slip ring 5 rotates, thereby driving the agitator 6 and the agitator frame 8 to rotate. The rotating agitator teeth loosen the sand and gravel layer at the bottom of the grouting pile hole 1, thus enabling better extraction of these sand and gravel.

[0031] The extraction pipe 4 can be a combination of two steel pipes 41 and a corrugated pipe 42 of variable length. Its specific structure is shown in Figure 6. The corrugated pipe 42 is located between the two steel pipes 41. A positioning strip 43 is welded to the outer wall of one steel pipe 41, and a positioning ring 44 is welded to the other steel pipe 41. The positioning strip 43 is inserted into the positioning ring 44, thereby allowing the length of the extraction pipe 4 to be changed, making it suitable for use in grouting pile holes 1 with different bottom sand and gravel accumulation heights. To provide power for the raising or lowering of the extraction pipe 4, a winch can be installed on the support 2.

[0032] The output end of the sand and gravel pump 3 is equipped with an output pipe 10 extending above the recovery tank 11 to transport the sand, gravel, and mud extracted from the grouting pile hole 1 to the recovery tank 11. Due to differences in mud texture and the influence of the drill bit, some defects, i.e., pits, will exist on the wall of the drilled grouting pile hole 1. The mud can effectively fill these pits. Therefore, the extracted sand, gravel, and mud need to be separated to filter out the sand and gravel from the mud. For this purpose, the recovery tank 11 of the present invention is equipped with a vibrating screen assembly.

[0033] Specifically, the vibrating screening assembly includes a servo motor 21, a cam 22, a first slider 23, a second slider 24, a mounting plate 27, a spring 28, a first screen plate 25, and a second screen plate 26. The screening holes of the first screen plate 25 are larger than those of the second screen plate 26, allowing for two-stage screening of sand and gravel in the slurry, resulting in a purer slurry and improved screening efficiency. The first slider 23 is slidably mounted on one side of the recovery tank 11, and the second slider 24 is slidably mounted on the other side of the recovery tank 11. The first screen plate 25 and the second screen plate 26 are mounted between the two sliders and are arranged at an angle. The servo motor 21 is mounted on the side wall of the recovery tank 11, and the cam 22 is fixedly mounted on the output end of the servo motor 21, with the cam 22 in contact with the first slider 23. The mounting plate 27 is fixedly mounted on the side wall of the recovery tank 11, and one end of the spring 28 is fixedly connected to the mounting plate 27, while the other end of the spring 28 is fixedly connected to the second slider 24.

[0034] The combination of cam 22 and spring 28 causes the spring 28 to compress when the servo motor 21 drives cam 22 to move the first slider 23 towards the first slider 23; when cam 22 does not apply a pushing force to the first slider 23, spring 28 releases its spring force to push the screen plate towards the first slider 23, thus forming a reciprocating pushing action on the screen plate. Since the screen plate is arranged at an angle, the reciprocating screen plate can more efficiently separate the sand and slurry discharged onto it, improving the screening efficiency.

[0035] After the mud is screened out, it can be discharged into the grouting pile hole 1. Therefore, the bottom of the recovery tank 11 is provided with a recovery pipe 12 of variable length.

[0036] Specifically, the recovery pipe 12 consists of two rigid pipe sections 121 and one corrugated pipe section 122. The corrugated pipe section 122 is located between the two rigid pipe sections 121. A sludge pump 20 is installed at the end of the recovery pipe 12 that connects to the recovery tank 11 to remove sludge from the recovery tank. The corrugated pipe section 122 allows the length of the recovery pipe 12 to be variable, making it adaptable to the movement of the filling assembly 13.

[0037] Considering that during on-site construction, the slurry in the cast-in-place pile hole 1 will not completely fill it, and that the slurry will be further reduced after being extracted by the sand and gravel pump 3 and filtered by the recovery tank 11, resulting in missing slurry in the pits of the cast-in-place pile hole 1 where it is not submerged, this embodiment has a movably installed filling component 13 in the cast-in-place pile hole 1 for filling the missing slurry in the wall of the cast-in-place pile hole 1. The recovery pipe 12 is connected to the filling component 13. Symmetrically arranged motor winding components are installed on both sides of the cast-in-place pile hole 1, and the filling component 13 is connected to the winding ends of the two motor winding components. That is, by setting the filling component 13, which can move in the cast-in-place pile hole 1, the pit filling operation in the cast-in-place pile hole 1 can be realized.

[0038] Specifically, the filling component 13 includes an upper seat 130, an intermediate seat 131, a lower seat 132, and a weighted lead block 138. The upper seat 130, intermediate seat 131, and lower seat 132 are an integral structure, and each of these components, including the upper seat 130, intermediate seat 131, lower seat 132, and weighted lead block 138, has a through hole 139 for inserting the extraction tube 4. A protective sleeve 140 is installed in the through hole 139. The diameters of the upper seat 130 and lower seat 132 are smaller than the diameter of the intermediate seat 131, and the circumferential sidewall of the intermediate seat 1 is in contact with the wall surface of the grouting pile hole 1. This contact between the intermediate seat 131 and the wall surface of the grouting pile hole 1 creates a leveling operation on the wall surface, making it smoother and also squeezing the mud in the pit, reducing its outflow.

[0039] In addition, to prevent the connection between the seats from cutting the wall of the grouting pile hole 1 during the movement of the filling component 13, the connection between the upper seat 130 and the lower seat 132 and the middle seat 131 in this embodiment is a rounded corner structure.

[0040] The upper seat 130 has a mud storage chamber 134, and a mud inlet 133 connected to the recovery pipe 12 is provided above the mud storage chamber 134. The middle seat 131 has a mud outlet channel 135, and a pressure valve 136 is installed in the mud outlet channel 135. The lower seat 132 has a mud spraying channel 137, which faces the wall of the grouting pile hole 1.

[0041] When the mud is discharged into the mud storage chamber 134 through the recovery pipe 12, after the pressure of the mud in the mud storage chamber 134 is greater than or equal to the opening pressure of the pressure equalization valve 136, the mud will enter the mud spraying channel 137 through the mud outlet channel 135, thereby spraying the mud onto the wall of the cast-in-place pile hole 1 to fill the pits on the wall of the cast-in-place pile hole 1. The mud adhering to the wall of the cast-in-place pile hole 1 will be scraped off by the action of the intermediate seat 131.

[0042] It should be noted that the filling operation for the dent should be performed when the filling component 13 is moved down as a whole.

[0043] The motor winding assembly includes a geared motor 14, a winding shaft 15, a winding reel 16, and a steel cable 17. The geared motor 14 is fixedly installed on the ground on one side of the grouting pile hole 1. The winding shaft 15 is fixedly installed on the output end of the geared motor 14. The winding reel 16 is fixedly installed on the winding shaft 15. One end of the steel cable 17 is wound around the winding reel 16. Two symmetrically arranged lifting rings 141 are welded on the upper body 130. The other end of the steel cable 17 is fixedly tied to the lifting rings 141, thereby driving the filling assembly 13.

[0044] The working principle of this invention is as follows: Air pump 18 and sand pump 3 are started simultaneously. Air pump 18 sends compressed gas into air slip ring 5, driving air slip ring 5 to rotate agitator 6 and agitator frame 8. The length of extraction pipe 4 is adjusted by a winch so that agitator 6 and agitator frame 8 can contact the sand and gravel layer at the bottom of the grouting pile hole 1 and loosen it. This sand and gravel, along with some mud, is extracted through extraction pipe 4 and output from output pipe 10 to the vibrating screen assembly above recovery tank 11. Due to the driving action of servo motor 21 on cam 22 and the cooperation of spring 28, the two screen plates can move back and forth, thereby screening the sand and gravel mud. The screened mud falls into recovery tank 11.

[0045] The mud pump 20 is started to pump the mud from the recovery tank 11 into the filling assembly 13. When the mud is discharged into the mud storage chamber 134 through the recovery pipe 12, after the pressure of the mud in the mud storage chamber 134 is greater than or equal to the opening pressure of the pressure equalization valve 136, the mud will enter the mud spraying channel 137 through the mud outlet channel 135, thereby spraying the mud onto the wall of the cast-in-place pile hole 1 to fill the pits on the wall of the cast-in-place pile hole 1. The filling assembly 13 is driven by the motor winding assembly, so that the mud adhering to the wall of the cast-in-place pile hole 1 is scraped off by the downward movement of the intermediate seat 131.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A hole cleaning device for cast-in-place piles, comprising a sand and gravel pump (3) and a recovery tank (11); the sand and gravel pump (3) is installed above the cast-in-place pile hole (1) via a bracket (2), the recovery tank (11) is installed on one side of the cast-in-place pile hole (1), an extraction pipe (4) extending into the cast-in-place pile hole (1) is installed at the input end of the sand and gravel pump (3), and an output pipe (10) extending above the recovery tank (11) is installed at the output end of the sand and gravel pump (3); characterized in that, The extraction pipe (4) is equipped with a cyclone loosening assembly for loosening the sand and gravel at the bottom of the grouting pile hole (1); a vibrating screening assembly is installed in the recovery tank (11), and a recovery pipe (12) of variable length is provided at the bottom of the recovery tank (11); symmetrically arranged motor winding assemblies are installed on both sides of the grouting pile hole (1), and a filling assembly (13) for filling the missing parts of the wall of the grouting pile hole (1) is movably installed in the grouting pile hole (1), the filling assembly (13) is connected to the winding ends of the two motor winding assemblies, and the recovery pipe (12) is connected to the filling assembly (13); the filling assembly (13) includes an upper seat (1 30) An intermediate seat (131) and a lower seat (132); the upper seat (130) has a mud storage chamber (134), and a mud inlet (133) connected to the recovery pipe (12) is provided above the mud storage chamber (134); the intermediate seat (131) has a mud outlet channel (135), and a pressure valve (136) is installed in the mud outlet channel (135); the lower seat (132) has a mud spraying channel (137), and the mud spraying channel (137) faces the wall of the grouting pile hole (1); the circumferential sidewall of the intermediate seat (131) is in contact with the wall of the grouting pile hole (1), and the upper seat (130) and the lower seat (132) are connected. The diameter of (132) is smaller than that of the intermediate seat (131); the connection between the upper seat (130) and the lower seat (132) and the intermediate seat (131) is a rounded corner structure; a weighted lead block (138) is installed below the lower seat (132); the upper seat (130), the intermediate seat (131) and the lower seat (132) are an integral structure, and a through hole (139) for inserting the extraction tube (4) is opened in the upper seat (130), the intermediate seat (131), the lower seat (132) and the weighted lead block (138), and a protective sleeve (140) is installed in the through hole (139); the cyclone loosening assembly includes The air slip ring (5), the stirring cylinder (6), and a plurality of stirring frames (8) are evenly installed on the outer wall of the stirring cylinder (6); one end of the air slip ring (5) is installed at the end of the extraction pipe (4), the stirring cylinder (6) is installed at the other end of the air slip ring (5), and the end of the stirring cylinder (6) away from the air slip ring (5) is provided with stirring tooth one (7); the bottom of the stirring frame (8) is fixedly provided with stirring tooth two (9); an air pump (18) is installed on the bracket (2), the air pump (18) is connected to the air inlet end of the air slip ring (5) through the air supply pipe (19), and an exhaust pipe is installed at the air outlet end of the air slip ring (5), the exhaust pipe extending to the outside of the grouting pile hole (1).

2. The hole cleaning device for cast-in-place piles according to claim 1, characterized in that, The recovery pipe (12) consists of two rigid pipe sections (121) and one corrugated pipe section (122); the corrugated pipe section (122) is located between the two rigid pipe sections (121); a mud pump (20) is installed at one end of the recovery pipe (12) that is connected to the recovery tank (11).

3. The hole cleaning device for cast-in-place piles according to claim 1, characterized in that, The motor winding assembly includes a geared motor (14), a winding shaft (15), a winding wheel (16), and a steel cable (17). The geared motor (14) is fixedly installed on the ground on one side of the grouting pile hole (1). The winding shaft (15) is fixedly installed at the output end of the geared motor (14). The winding wheel (16) is fixedly installed on the winding shaft (15). One end of the steel cable (17) is wound around the winding wheel (16). Two symmetrically arranged lifting rings (141) are welded on the upper body (130). The other end of the steel cable (17) is fixedly tied to the lifting rings (141).

4. The hole cleaning device for cast-in-place piles according to claim 1, characterized in that, The vibrating screening assembly includes a servo motor (21), a cam (22), a first slider (23), a second slider (24), a mounting plate (27), a spring (28), a first screen plate (25), and a second screen plate (26). The first slider (23) is slidably mounted on one side of the recycling pool (11), and the second slider (24) is slidably mounted on the other side of the recycling pool (11). The first screen plate (25) and the second screen plate (26) are mounted between the two sliders, and the first screen plate (25) and the second screen plate (26) are arranged at an angle. The servo motor (21) is mounted on the side wall of the recycling pool (11), and the cam (22) is fixedly mounted on the output end of the servo motor (21). The cam (22) is in contact with the first slider (23). The mounting plate (27) is fixedly mounted on the side wall of the recycling pool (11). One end of the spring (28) is fixedly connected to the mounting plate (27), and the other end of the spring (28) is fixedly connected to the second slider (24).

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