Cast-in-situ bored pile sediment cleaning device

Abstract

The invention provides a cast-in-situ bored pile sediment cleaning device which comprises a guide pipe, the side wall of the guide pipe is provided with an inflation mechanism, the inflation mechanism comprises a mixing pipe, the side wall of the mixing pipe is provided with a spiral spraying pipe, and the side wall of the spraying pipe is obliquely provided with a plurality of spraying heads distributed annularly. The inclination angle of the spray head is gradually increased from bottom to top; the inflation pipe is communicated with the slurry supplementing mechanism, the slurry supplementing mechanism comprises an adjusting cylinder, and an adjusting mechanism is installed in the adjusting cylinder; a stirring mechanism for stirring sediment and mixing gas is mounted at the bottom end of the guide pipe, the stirring mechanism comprises a fixed cylinder, a plurality of supporting rods are obliquely mounted on the bottom surface of the fixed cylinder, and the bottom ends of the supporting rods penetrate through the baffle and are communicated with the cylinder body; a plurality of grooves are formed in the side wall of the cylinder body, and a plurality of guide plates are fixedly connected to the side wall of the cylinder body in an inclined mode. The sediment cleaning device for the cast-in-situ bored pile has the advantages of being high in sediment discharging efficiency and capable of preventing hole walls from being disturbed.

Description

Technical Field

[0001] This invention relates to the field of bored pile construction technology, and in particular to a device for cleaning sediment from bored piles. Background Technology

[0002] The working principle of air-lift reverse circulation borehole cleaning is to use the density difference between compressed air and drilling mud to suspend and remove sediment from the bottom of the bored pile. Compressed air is delivered to the slurry outlet pipe inside the pile hole through an air duct, where it mixes with the drilling mud to form an air-liquid mixture. Since the density of the air-liquid mixture is less than that of the drilling mud outside the pipe, the mixture moves upward along the pipe under the combined action of gravity and air pressure. The cross-sectional area inside the pipe is much smaller than the annular cross-sectional area between the outer wall of the pipe and the pile wall, resulting in a high-speed reverse circulation flow of the mixture inside the pipe. This flow creates negative pressure inside the pipe, further pushing the drilling mud upward and continuously replenishing it with new mud to maintain circulation. The air-liquid mixture carries the sediment from the bottom of the hole upward and is finally discharged from the hole through the pipe.

[0003] During the air-lift reverse circulation slag removal process, slurry needs to be continuously added to the inside of the pile hole, which can easily cause disturbance to the hole wall and lead to hole collapse. During the slag discharge process of the guide pipe, the difference between the three-phase flow density (ρn) inside the guide pipe and the liquid density (ρw) outside the guide pipe (ρw-ρn) directly affects the pressure difference. The greater the pressure difference, the stronger the slag discharge capacity. The three-phase flow inside the guide pipe consists of high-pressure air, pile bottom mud, and bottom sediment. Due to the action of gravity, the solid matter in the mud settles, resulting in the highest density of the pile bottom mud. Excessive solid matter in the pile bottom mud reduces the pressure difference, requiring an increase in the compressed air volume to reduce the density of the three-phase flow inside the guide pipe, increasing energy consumption. Moreover, after increasing the compressed air volume, the compressed air is prone to forming large air bubbles inside the guide pipe, resulting in poor three-phase flow stability and affecting the slurry discharge speed and sediment removal effect.

[0004] Therefore, it is necessary to develop a new device for cleaning sediment from bored piles to solve the above-mentioned technical problems. Summary of the Invention

[0005] The technical problem solved by this invention is to provide a slag removal device for bored piles that has high slag removal efficiency and prevents disturbance to the borehole wall.

[0006] To solve the above-mentioned technical problems, the present invention provides a borehole pile sediment cleaning device comprising: a guide pipe, an air-inflating mechanism installed on the side wall of the guide pipe, the air-inflating mechanism including a mixing pipe, a mixing pipe installed at the bottom end of the guide pipe, a spiral nozzle installed on the side wall of the mixing pipe, the bottom end of the nozzle connected to the air-inflating pipe, and multiple nozzles arranged in a ring on the side wall of the nozzle at an angle that gradually increases from bottom to top; the air-inflating pipe connected to a grouting mechanism, the grouting mechanism including an adjusting cylinder, a grouting pipe installed at the top end of the adjusting cylinder, and the grouting pipe connected to the air-inflating mechanism via a second air pipe. The pipe has an internal regulating mechanism for controlling the volume of high-pressure air inside the regulating cylinder; the bottom end of the pipe has an agitation mechanism for turning over sediment and mixing gas, the agitation mechanism includes a fixed cylinder, the fixed cylinder is fixed to the bottom end of the pipe, and multiple support rods are installed obliquely on the bottom surface of the fixed cylinder; the bottom end of the support rod passes through a conical baffle, and the cylinder body is rotatably connected inside the arc-shaped baffle; the conical cylinder body has multiple grooves on its sidewalls, and multiple guide plates are obliquely fixedly connected to the sidewalls of the cylinder body, with the guide plates located on one side of the grooves.

[0007] Preferably, the guide tube is inserted into the pile hole, a sedimentation tank is provided on one side of the pile hole, and the top end of the guide tube is connected to the sedimentation tank; a high-pressure air pump is provided on the other side of the pile hole, and the high-pressure air pump is connected to the air filling pipe; a first air pipe and a second air pipe are installed at the bottom end of the air filling pipe, and the inner diameter of the first air pipe is larger than the inner diameter of the second air pipe.

[0008] Preferably, a mud pit is provided on one side of the pile hole, and a mud pump is installed at the top of the mud pit, with the mud pump connected to the grouting pipe.

[0009] Preferably, a baffle is installed in the center of the interior of the regulating cylinder, and the grouting pipe and the first air pipe are respectively installed at the top of the regulating cylinder. One side of the regulating cylinder is connected to the spray pipe through a connecting pipe, and the other side of the regulating cylinder is connected to the fixed cylinder through a connecting pipe. The first air pipe and the connecting pipe are located on one side of the baffle, and the grouting pipe and the connecting pipe are located on the other side of the baffle.

[0010] Preferably, the adjusting mechanism includes an elastic rubber diaphragm, with the diaphragm having an arc-shaped sidewall installed at the center of the sidewall of the partition; a protective tube is installed on the sidewall of the partition, with a steel wire rope slidably connected inside the protective tube, and the two ends of the steel wire rope being connected to the rubber diaphragm and a piston, respectively; a fixing block is vertically installed on the sidewall of the second air pipe, with a piston slidably connected inside the fixing block, and the piston having a "T"-shaped sidewall being slidably connected to the inside of the second air pipe; a spring is installed inside the fixing block, with one end of the spring connected to the piston.

[0011] Preferably, the bottom end of the second air tube is inclined, and the air outlet of the second air tube is aligned with the inside of the top of the regulating cylinder.

[0012] Preferably, a bearing is installed at the connection between the baffle and the cylinder, and a sealing ring is installed at the bottom end of the bearing.

[0013] Preferably, a rotating shaft is installed inside the cylinder, and a spiral extrusion plate is installed on the side wall of the rotating shaft. The extrusion plate is located inside the cylinder, and the bottom end of the rotating shaft has a funnel-shaped structure.

[0014] Preferably, the maximum diameter of the cylinder is smaller than the maximum diameter of the baffle, and the center of the baffle and the center of the conduit are located on the same straight line.

[0015] Preferably, the support rod has a hollow frustum structure, multiple support rods are located around the feed inlet of the conduit, and the gap formed between adjacent support rods is funnel-shaped.

[0016] Compared with related technologies, the borehole pile sediment cleaning device provided by the present invention has the following beneficial effects: This invention provides a device for cleaning sediment from bored piles. During the air-lift reverse circulation cleaning process, high-pressure gas enters the mixing cylinder, creating suction at the bottom of the guide tube. A mud pump delivers upper layer mud slurry into the mixing cylinder. Inside the mixing cylinder, the mud is accelerated by the high-pressure gas and then transported into the cylinder body. The mixture of mud and high-pressure gas is sprayed into the sediment layer through the groove and along the guide plate, pushing the cylinder body to rotate within the sediment layer. This ensures the mixture of mud and high-pressure gas is evenly sprayed into the sediment layer, causing the sediment to rise and simultaneously mixing with the mud and high-pressure gas within the sediment. The sediment, mud, and high-pressure gas move around the baffle plate. The guide tube... The bottom end generates suction, and the sidewall of the baffle is arc-shaped, allowing sediment, mud, and high-pressure gas to enter the interior of the guide tube along the baffle, quickly carrying away the agitated sediment and accelerating the sediment cleaning efficiency. The three-phase flow entering the interior of the guide tube along the baffle contains air bubbles, and most of the mud entering the guide tube is mud sprayed from inside the cylinder. This mud is extracted from the upper clear liquid of the mud pool and has a low density, thereby reducing the density of the three-phase flow entering the guide tube, increasing the pressure difference inside the guide tube, and accelerating the slag discharge efficiency. During the slag discharge process, the mud used for replenishing the slurry enters directly into the bottom end of the pile hole through the cylinder, agitating the sediment, and most of the mud sprayed from the cylinder is sucked away by the guide tube, thus avoiding disturbance to the hole wall.

[0017] The three-phase flow inside the duct moves upward and enters the mixing tube, where the gas ejected from the nozzle mixes with the three-phase flow again. Because the high-pressure air moves upward inside the nozzle, the flow rate of the high-pressure air ejected from the nozzle gradually decreases from bottom to top. As the nozzle's tilt angle gradually increases from bottom to top, and from bottom to top, the high-pressure air ejected from the nozzle gradually approaches the inner wall of the mixing tube, pushing the mud and bubbles to rotate clockwise inside the mixing tube, forming turbulence. The nozzle at the lowest point ejects the highest flow rate of high-pressure air, and the high-pressure air ejected here is aimed at the center of the mixing tube. Increasing the travel distance of the high-pressure air and its impact on the mud facilitates the dispersion of high-pressure air into the mud's interior while preventing excessive impact on the mixing pipe. A nozzle with a higher high-pressure air flow rate is positioned lower in the mixing pipe, allowing a large amount of high-pressure air to be injected into the bottom of the pipe. This increases the mixing time and distance between the high-pressure gas and the mud, reducing bubble size. Furthermore, a high degree of turbulence is created at the top of the mixing pipe, and the high-speed turbulent rotation further mixes the mud and high-pressure gas, resulting in small bubbles being evenly distributed within the mud. This increases the stability of the three-phase flow inside the conduit, improving the discharge rate and sediment removal efficiency. Attached Figure Description

[0018] Figure 1 A schematic diagram of a preferred embodiment of the borehole pile sediment cleaning device provided by the present invention; Figure 2 for Figure 1 The diagram shows an enlarged view of the structure at point A. Figure 3 for Figure 1 The diagram shows the internal structure of the mixing tube. Figure 4 for Figure 3 The diagram shows an enlarged view of the structure at point B. Figure 5 for Figure 3 The diagram shows an enlarged view of the structure at point C. Figure 6 for Figure 2 The diagram shows a top view of the internal structure of the mixing tube. Figure 7 for Figure 2 The diagram shows a top view of the internal structure of the cylinder.

[0019] Numbered in the diagram: 1. Pile hole, 11. Sediment layer, 2. Conduit, 21. Sedimentation tank, 3. Grouting mechanism, 31. Grouting pipe, 32. Mud pump, 33. Mud tank, 34. Connecting pipe, 35. Adjusting cylinder, 36. Baffle, 4. Air inflation mechanism, 41. Air inflation pipe, 42. High-pressure air pump, 43. Mixing pipe, 44. Spray pipe, 45. Nozzle, 46. Connecting pipe, 47. First air pipe, 48. Second air pipe, 5. Tilting mechanism, 51. Fixed cylinder, 52. Support rod, 53. Cylinder body, 54. Guide plate, 55. Sealing ring, 56. Baffle, 57. Groove, 58. Rotating shaft, 59. Extrusion plate, 510. Bearing, 6. Adjusting mechanism, 61. Protective pipe, 62. Steel wire rope, 63. Rubber diaphragm, 64. Spring, 65. Fixing block, 66. Piston. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1 to 7 , Figure 1 A schematic diagram of a preferred embodiment of the borehole pile sediment cleaning device provided by the present invention; Figure 2 for Figure 1 The diagram shows an enlarged view of the structure at point A. Figure 3 for Figure 1 The diagram shows the internal structure of the mixing tube. Figure 4 for Figure 3 The diagram shows an enlarged view of the structure at point B. Figure 5 for Figure 3 The diagram shows an enlarged view of the structure at point C. Figure 6 for Figure 2 The diagram shows a top view of the internal structure of the mixing tube. Figure 7 for Figure 2The diagram shows a top view of the internal structure of the cylinder. A borehole pile sediment cleaning device includes a guide pipe 2. An air-inflating mechanism 4 is installed on the side wall of the guide pipe 2. The air-inflating mechanism 4 includes a mixing pipe 43. The mixing pipe 43 is installed at the bottom end of the guide pipe 2. A spiral nozzle 44 is installed on the side wall of the mixing pipe 43. The bottom end of the nozzle 44 is connected to an air-inflating pipe 41. Multiple nozzles 45 are installed obliquely in a ring-shaped arrangement on the side wall of the nozzle 44, with the inclination angle of the nozzles 45 gradually increasing from bottom to top. When high-pressure air enters the interior of the nozzle 44, the air spirals upward along the nozzle 44, and the high-pressure air is sprayed through the nozzles 45. Inside the mixing pipe 43, high-pressure gas mixes with the mud inside the mixing pipe 43 to form a gas-liquid mixture. The gas-liquid mixture moves upward and is quickly discharged through the conduit 2, simultaneously creating a negative pressure at the bottom of the conduit 2, drawing the pile bottom sediment into the conduit 2. Because the high-pressure air spirals upward inside the nozzle 44, the flow rate of the high-pressure air ejected from the nozzle 45 gradually decreases from bottom to top. Because the tilt angle of the nozzle 45 gradually increases from bottom to top, and from bottom to top, the high-pressure air ejected from the nozzle 45 gradually approaches the inner wall of the mixing pipe 43 (as shown in the attached diagram). Figure 6 As shown, the slurry and bubbles are propelled to rotate clockwise inside the mixing pipe 43, forming turbulence. The nozzle 45 at the lowest point emits the highest flow rate of high-pressure air, which is directed towards the center of the mixing pipe 43, increasing the travel distance of the high-pressure air and its impact on the slurry. This facilitates the high-pressure air's penetration into the slurry while preventing excessive impact on the mixing pipe 43. The nozzle 45 with a higher flow rate of high-pressure air is positioned lower in the mixing pipe 43, allowing a large amount of high-pressure air to be injected into the bottom of the mixing pipe 43. This increases the mixing time and distance between the high-pressure gas and the slurry, reduces the size of the bubbles, and creates high-speed turbulence at the top of the mixing pipe 43. The high-speed turbulent rotation further mixes the slurry and high-pressure gas, resulting in small bubbles being evenly distributed inside the slurry. This increases the stability of the three-phase flow inside the conduit 2, improving the discharge speed and sediment removal effect.

[0022] The air inflator 41 is connected to the grouting mechanism 3. The grouting mechanism 3 includes an adjusting cylinder 35. The grouting pipe 31 is installed at the top of the adjusting cylinder 35. The grouting pipe 31 is connected to the air inflator 41 through a second air pipe 48. A partition 36 is installed in the center of the interior of the adjusting cylinder 35. The grouting pipe 31 and the first air pipe 47 are respectively installed at the top of the adjusting cylinder 35. One side of the adjusting cylinder 35 is connected to the nozzle 44 through a connecting pipe 46, and the other side of the adjusting cylinder 35 is connected to the fixed cylinder 51 through a connecting pipe 34. The first air pipe 47 and the connecting pipe 46 are located on the partition 3. On one side of 6, the slurry filling pipe 31 and the connecting pipe 34 are located on the other side of the partition 36; when the slurry enters the interior of the regulating cylinder 35 through the slurry filling pipe 31, high-pressure air enters the interior of the regulating cylinder 35 through the first air pipe 47, and the partition 36 separates the gas from the slurry; during the process of the slurry entering the interior of the regulating cylinder 35, part of the high-pressure gas inside the air filling pipe 41 enters the interior of the slurry filling pipe 31 through the second air pipe 48, so that the slurry enters the interior of the regulating cylinder 35 quickly, increasing the flow rate of the slurry inside the regulating cylinder 35, and at the same time, allowing the gas to initially mix with the slurry.

[0023] A mud pit 33 is provided on one side of the pile hole 1, and a mud pump 32 is installed at the top of the mud pit 33. The mud pump 32 is connected to the grouting pipe 31. In order to facilitate the mud pump 32 to transport the clear liquid on the upper layer of the mud pit 33 into the grouting pipe 31 and reduce the density of the mud inside the grouting pipe 31.

[0024] An adjustment mechanism 6 for controlling the volume of high-pressure air inside the regulating cylinder 35 is installed inside the regulating cylinder 35. The adjustment mechanism 6 includes an elastic rubber diaphragm 63, with the diaphragm 63 having an arc-shaped sidewall installed at the center of the sidewall of the diaphragm 36. A protective tube 61 is installed on the sidewall of the diaphragm 36, and a steel wire rope 62 is slidably connected inside the protective tube 61. The two ends of the steel wire rope 62 are respectively connected to the rubber diaphragm 63 and a piston 66. A fixing block 65 is vertically installed on the sidewall of the second air pipe 48, and a piston 66 is slidably connected inside the fixing block 65. The piston 66, with a "T"-shaped sidewall, is slidably connected to the inside of the second air pipe 48. A spring 64 is installed inside the fixing block 65, and one end of the spring 64 is connected to the piston 66. High-pressure gas inside the air filling pipe 41 enters the interior of the regulating cylinder 35 through the air pipe, and a small amount of gas is used to treat the mud inside the regulating cylinder 35. As the flow rate and pressure increase, when the mud pressure on one side of the partition 36 is too low, the pressure of the high-pressure gas on the other side of the partition 36 on the rubber diaphragm 63 increases. The rubber diaphragm 63 deforms and moves towards the mud. The deformation of the rubber diaphragm 63 drives the steel wire rope 62 to move downward inside the protective tube 61. The movement of the steel wire rope 62 drives the piston 66 to move inside the fixed block 65, compressing the spring 64. The movement of the piston 66 increases the gap inside the second air pipe 48, allowing more gas from the air in the air inlet pipe 41 to enter the interior of the regulating cylinder 35 through the second air pipe 48, increasing the flow rate of the mud inside the regulating cylinder 35, making it easier for the mud to turn the sediment at the bottom of the hole upward. When the mud flow rate is appropriate, the rubber diaphragm 63 returns to its original position, and the spring 64 extends to push the piston 66 into the interior of the second air pipe 48, thereby reasonably controlling the flow rate of the mud inside the regulating cylinder 35.

[0025] A turning mechanism 5 for agitating sediment and mixing gas is installed at the bottom end of the conduit 2. The turning mechanism 5 includes a fixed cylinder 51, which is fixed to the bottom end of the conduit 2. Multiple support rods 52 are installed at an angle on the bottom surface of the fixed cylinder 51. The bottom end of each support rod 52 passes through a conical baffle 56, and the inside of the arc-shaped baffle 56 is rotatably connected to a cylinder 53. The conical cylinder 53 has multiple grooves 57 on its sidewalls, and the sidewalls of the cylinder 53 are inclined. Multiple guide plates 54 are fixedly connected, and the guide plates 54 are located on one side of the groove 57; when the slurry with increased speed passes through the regulating cylinder 35, it sequentially enters the interior of the cylinder body 53 through the fixed cylinder 51 and the support rod 52. The cylinder body 53 is conical, which facilitates the insertion of the cylinder body 53 into the interior of the sediment layer 11; the mixture of slurry and high-pressure gas is sprayed into the interior of the sediment layer 11 through the groove 57. The guide plates 54 are installed at an angle on one side of the groove 57. The slurry is sprayed obliquely into the interior of the sediment layer 11 along multiple guide plates 54, thereby pushing the cylinder 53 to rotate inside the sediment layer 11. This causes the mixture of slurry and high-pressure gas to be evenly sprayed into the interior of the sediment layer 11, causing the mixture to turn the sediment upwards. At the same time, the slurry and high-pressure gas are mixed into the interior of the sediment, causing the sediment, slurry, and high-pressure gas to move around the baffle 56. The bottom end of the guide 2 generates suction, and the sidewall of the baffle 56 is arc-shaped, causing the sediment, slurry, and high-pressure gas to move around the baffle 56. The sludge enters the interior of the conduit 2 along the baffle 56, quickly carrying away the stirred-up sediment and accelerating the sediment cleaning efficiency. The three-phase flow entering the interior of the conduit 2 along the baffle 56 contains air bubbles, and most of the sludge entering the interior of the conduit 2 is sludge sprayed from inside the cylinder 53. This sludge is extracted from the upper clear liquid of the sludge tank 33 and has a low density, thereby reducing the density of the three-phase flow entering the interior of the conduit 2, increasing the pressure difference inside the conduit 2, and accelerating the sludge discharge efficiency.

[0026] The conduit 2 is inserted into the pile hole 1. A sedimentation tank 21 is provided on one side of the pile hole 1. The top end of the conduit 2 is connected to the sedimentation tank 21 to facilitate the three-phase flow inside the conduit 2 into the sedimentation tank 21, allowing the sludge to settle inside the sedimentation tank 21. A high-pressure air pump 42 is provided on the other side of the pile hole 1. The high-pressure air pump 42 is connected to the air filling pipe 41 to facilitate the high-pressure airflow generated by the high-pressure air pump 42, which is then transported into the conduit 2 through the air filling pipe 41. A first air pipe 47 and a second air pipe 48 are installed at the bottom end of the air filling pipe 41. The inner diameter of the first air pipe 47 is larger than the inner diameter of the second air pipe 48. This is to ensure that the flow rate of the gas inside the first air pipe 47 is greater than the flow rate of the gas inside the second air pipe 48, allowing most of the high-pressure gas to enter the mixing cylinder 43.

[0027] The bottom end of the second air pipe 48 is inclined, and the air outlet of the second air pipe 48 is aligned with the top interior of the regulating cylinder 35. This is to facilitate the inclined injection of high-pressure gas from the second air pipe 48 into the interior of the regulating cylinder 35, and to quickly bring the slurry from the slurry filling pipe 31 into the interior of the regulating cylinder 35, thereby increasing the slurry speed.

[0028] A bearing 510 is installed at the connection between the baffle 56 and the cylinder 53, and a sealing ring 55 is installed at the bottom of the bearing 510. This is to facilitate the rotation of the cylinder 53 below the baffle 56, and the sealing ring 55 prevents impurities from entering the interior of the bearing 510, thus facilitating the operation of the bearing 510.

[0029] A rotating shaft 58 is installed inside the cylinder 53. A spiral extrusion plate 59 is installed on the side wall of the rotating shaft 58. The extrusion plate 59 is located inside the cylinder 53, and the bottom end of the rotating shaft 58 has a funnel-shaped structure. When the cylinder 53 rotates counterclockwise, it drives the rotating shaft 58 and the extrusion plate 59 to rotate. The extrusion plate 59 is spiral-shaped. When the mud and air flow inside the cylinder 53, turbulence is formed on the side wall of the extrusion plate 59, which makes the mud and high-pressure gas mix evenly and fills the mud with small air bubbles. This makes it easier for the mud filled with air bubbles to stir up the sediment upward. The spiral extrusion plate 59 rotates counterclockwise and squeezes the mud and air bubbles downward, increasing the force of the mud and air bubbles entering the sediment, thereby turning the sediment up.

[0030] The maximum diameter of the cylinder 53 is smaller than the maximum diameter of the baffle 56. The center of the baffle 56 and the center of the conduit 2 are on the same straight line. In order to facilitate the separation of the conduit 2 and the cylinder 53 by the baffle 56, the suction generated inside the conduit 2 draws the mixture around the baffle 56 into the conduit 2. The cylinder 53 agitates the sediment below the baffle 56. The baffle 56 separates the two processes to avoid mutual interference.

[0031] The support rod 52 has a hollow frustum structure, which facilitates the slurry and high-pressure gas to converge and accelerate before entering the interior of the cylinder 53. Multiple support rods 52 are located around the feed inlet of the guide tube 2, and the gaps formed between adjacent support rods 52 are funnel-shaped, so that the mixture around the baffle 36 can pass through the gaps between the support rods 52 into the interior of the guide tube 2 and quickly carry away the stirred-up sediment.

[0032] The working principle of the borehole pile sediment cleaning device provided by the present invention is as follows: The guide tube 2 is inserted into the interior of the pile hole 1, and the cylinder 53 is inserted into the interior of the sediment layer 11. There is a certain gap between the bottom end of the guide tube 2 and the diameter of the sediment layer 11. The device is connected to an external power source, and the high-pressure air pump 42 and the mud rod 32 are turned on. High-pressure air enters the interior of the nozzle 44 through the air filling pipe 41, the first air pipe 47 and the connecting pipe 46. The air moves spirally upward along the nozzle 44, and the high-pressure air is sprayed into the interior of the mixing pipe 43 through the nozzle 45. The high-pressure gas mixes with the mud inside the mixing pipe 43 to form a gas-liquid mixture. The gas-liquid mixture moves upward and is quickly discharged through the guide tube 2. At the same time, a negative pressure is formed at the bottom end of the guide tube 2, which draws the sediment at the bottom of the pile into the interior of the guide tube 2. As the mud enters the regulating cylinder 35 through the slurry filling pipe 31, some of the high-pressure gas inside the air filling pipe 41 enters the slurry filling pipe 31 through the second air pipe 48, causing the mud to enter the regulating cylinder 35 quickly, increasing the flow rate of the mud inside the regulating cylinder 35, and simultaneously allowing the gas to initially mix with the mud. When the mud flows inside the regulating cylinder 35, if the mud pressure on one side of the baffle 36 is too low, the pressure of the high-pressure gas on the other side of the baffle 36 increases on the rubber diaphragm 63. The rubber diaphragm 63 deforms and moves towards the mud. The deformation of the rubber diaphragm 63 drives the steel wire rope 62 to move downwards inside the protective pipe 61. The movement of the steel wire rope 62 drives the piston 66 to move inside the fixed block 65, compressing the spring 64. The movement of the piston 66 increases the gap inside the second air pipe 48, allowing more gas from the air filling pipe 41 to enter the regulating cylinder 35 through the second air pipe 48, increasing the flow rate of the mud inside the regulating cylinder 35. The mixture of mud and high-pressure gas is sprayed into the interior of the sediment layer 11 through the groove 57. The guide plate 54 is installed at an angle on one side of the groove 57. The mixture of mud and high-pressure gas is sprayed into the interior of the sediment layer 11 at an angle along the multiple guide plates 54, thereby pushing the cylinder 53 to rotate inside the sediment layer 11, so that the mixture of mud and high-pressure gas is evenly sprayed into the interior of the sediment layer 11, and the mixture of mud and high-pressure gas turns the sediment upward.When the slurry and airflow move inside the cylinder 53, turbulence is formed on the sidewall of the spiral extrusion plate 59, causing the slurry and high-pressure gas to mix evenly and fill the slurry with small air bubbles. This facilitates the upward stirring of the sediment by the bubble-filled slurry. Furthermore, the spiral extrusion plate 59 rotates counterclockwise to squeeze the slurry and air bubbles downwards, increasing the force of the slurry and air bubbles entering the sediment, thereby turning the sediment upside down. The sediment, slurry, and high-pressure gas move around the baffle 56, generating suction at the bottom of the guide tube 2. The sidewall of the baffle 56 is arc-shaped. The baffle 56 allows sediment, slurry, and high-pressure gas to enter the interior of the conduit 2, quickly carrying away the stirred-up sediment and accelerating the sediment cleaning efficiency. The three-phase flow entering the interior of the conduit 2 along the baffle 56 contains air bubbles, and most of the slurry entering the interior of the conduit 2 is slurry sprayed from inside the cylinder 53. This slurry is extracted from the upper clear liquid of the slurry tank 33 and has a low density, thereby reducing the density of the three-phase flow entering the interior of the conduit 2, increasing the pressure difference inside the conduit 2, and accelerating the sludge discharge efficiency. The mixture inside the conduit 2 moves upward and enters the mixing pipe 43, where the gas ejected from the nozzle 45 mixes with the mixture again. As the high-pressure air moves upward inside the nozzle 44, the flow rate of the high-pressure air ejected from the nozzle 45 gradually decreases from bottom to top. Because the tilt angle of the nozzle 45 gradually increases from bottom to top, and from bottom to top, the high-pressure air ejected from the nozzle 45 gradually approaches the inner wall of the mixing pipe 43, pushing the mud and bubbles to rotate clockwise inside the mixing pipe 43, forming turbulence. The lowest nozzle 45 ejects the highest flow rate of high-pressure air, and the high-pressure air ejected here is directly aimed at the mixing pipe 43. The nozzle 45 is positioned at the center, increasing the distance the high-pressure air travels and the impact force on the mud. This facilitates the high-pressure air's penetration into the mud while preventing excessive impact on the mixing pipe 43. The nozzle 45 with a larger high-pressure air flow rate is positioned lower in the mixing pipe 43, allowing a large amount of high-pressure air to be injected into the bottom of the mixing pipe 43. This increases the mixing time and distance between the high-pressure gas and the mud, reduces the size of the bubbles, and creates high turbulence at the top of the mixing pipe 43. The high-speed turbulent rotation causes the mud and high-pressure gas to mix again, resulting in small bubbles being evenly distributed inside the mud. This increases the stability of the three-phase flow inside the conduit 2, improves the discharge speed, and enhances the sediment removal effect.

[0033] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A device for cleaning sediment from bored piles, characterized in that, include: A conduit (2) is provided with an inflation mechanism (4) installed on its sidewall. The inflation mechanism (4) includes a mixing pipe (43). The mixing pipe (43) is installed at the bottom end of the conduit (2). A spiral nozzle (44) is installed on the sidewall of the mixing pipe (43). The bottom end of the nozzle (44) is connected to an inflation pipe (41). Multiple nozzles (45) are installed obliquely in a ring-shaped arrangement on the sidewall of the nozzle (44). The oblique angle of the nozzles (45) gradually increases from bottom to top. The air inflator (41) is connected to the grouting mechanism (3). The grouting mechanism (3) includes an adjusting cylinder (35). The grouting pipe (31) is installed at the top of the adjusting cylinder (35). The grouting pipe (31) is connected to the air inflator (41) through a second air pipe (48). An adjusting mechanism (6) for controlling the volume of high-pressure air inside the adjusting cylinder (35) is installed inside the adjusting cylinder (35). The bottom end of the conduit (2) is equipped with a turning mechanism (5) for turning the sediment and mixing the gas. The turning mechanism (5) includes a fixed cylinder (51) which is fixed to the bottom end of the conduit (2). Multiple support rods (52) are installed obliquely on the bottom surface of the fixed cylinder (51). The bottom end of the support rod (52) passes through a cone-shaped baffle (56). The inside of the baffle (56) with an arc-shaped sidewall is rotatably connected to the cylinder body (53). The sidewall of the cone-shaped cylinder body (53) is provided with multiple grooves (57). Multiple guide plates (54) are obliquely fixedly connected to the sidewall of the cylinder body (53), and the guide plates (54) are located on one side of the grooves (57).

2. The borehole pile sediment cleaning device according to claim 1, characterized in that, The conduit (2) is inserted into the interior of the pile hole (1). A sedimentation tank (21) is provided on one side of the pile hole (1), and the top end of the conduit (2) is connected to the sedimentation tank (21). A high-pressure air pump (42) is provided on the other side of the pile hole (1), and the high-pressure air pump (42) is connected to the air filling pipe (41). A first air pipe (47) and a second air pipe (48) are installed at the bottom end of the air filling pipe (41). The inner diameter of the first air pipe (47) is larger than the inner diameter of the second air pipe (48).

3. The borehole pile sediment cleaning device according to claim 2, characterized in that, A mud pit (33) is provided on one side of the pile hole (1), and a mud pump (32) is installed at the top of the mud pit (33). The mud pump (32) is connected to the grouting pipe (31).

4. The borehole pile sediment cleaning device according to claim 3, characterized in that, A partition (36) is installed in the center of the interior of the regulating cylinder (35). The top of the regulating cylinder (35) is respectively equipped with the grouting pipe (31) and the first air pipe (47). One side of the regulating cylinder (35) is connected to the spray pipe (44) through the connecting pipe (46), and the other side of the regulating cylinder (35) is connected to the fixed cylinder (51) through the connecting pipe (34). The first air pipe (47) and the connecting pipe (46) are located on one side of the partition (36), and the grouting pipe (31) and the connecting pipe (34) are located on the other side of the partition (36).

5. The borehole pile sediment cleaning device according to claim 4, characterized in that, The adjusting mechanism (6) includes an elastic rubber diaphragm (63), and the rubber diaphragm (63) with an arc-shaped sidewall is installed at the center of the sidewall of the partition (36); a protective tube (61) is installed on the sidewall of the partition (36), and a steel wire rope (62) is slidably connected inside the protective tube (61), with the two ends of the steel wire rope (62) respectively connected to the rubber diaphragm (63) and the piston (66); a fixing block (65) is vertically installed on the sidewall of the second air pipe (48), and a piston (66) is slidably connected inside the fixing block (65), with the piston (66) having a "T"-shaped sidewall slidably connected to the inside of the second air pipe (48); a spring (64) is installed inside the fixing block (65), and one end of the spring (64) is connected to the piston (66).

6. The borehole pile sediment cleaning device according to claim 5, characterized in that, The bottom end of the second air pipe (48) is inclined, and the air outlet of the second air pipe (48) is aligned with the inside of the top of the regulating cylinder (35).

7. The borehole pile sediment cleaning device according to claim 1, characterized in that, A bearing (510) is installed at the connection between the baffle (56) and the cylinder (53), and a sealing ring (55) is installed at the bottom of the bearing (510).

8. The borehole pile sediment cleaning device according to claim 1, characterized in that, A rotating shaft (58) is installed inside the cylinder (53). A spiral extrusion plate (59) is installed on the side wall of the rotating shaft (58). The extrusion plate (59) is located inside the cylinder (53), and the bottom end of the rotating shaft (58) has a funnel-shaped structure.

9. The borehole pile sediment cleaning device according to claim 1, characterized in that, The maximum diameter of the cylinder (53) is smaller than the maximum diameter of the baffle (56), and the center of the baffle (56) and the center of the conduit (2) are on the same straight line.

10. The borehole pile sediment cleaning device according to claim 1, characterized in that, The support rod (52) has a hollow frustum structure. Multiple support rods (52) are located around the feed inlet of the guide tube (2), and the gap formed between adjacent support rods (52) is funnel-shaped.

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