Intelligent cast-in-place pile bottom sediment cleaning system and method based on air pressure difference driving

Abstract

The invention relates to the technical field of cast-in-place pile bottom sediment cleaning, and provides an intelligent cast-in-place pile bottom sediment cleaning system and method based on air pressure difference driving, and the system comprises a movable motor, a movable air compressor, a small bridge crane, a control computer, and a pile bottom sediment intelligent cleaning device. The intelligent pile bottom sediment cleaning device comprises a sediment storage bin, a sediment suction pipe, a pneumatic valve, a water level detector, an in-bin optical fiber visual sensor, a primary filter screen, a fine filter screen, a deep filter screen, a supporting frame and a pile bottom sediment thickness detection device. According to the principle of internal and external air pressure difference, pile bottom sediment is sucked into the bin for filtering by reducing air pressure in the device, the device is small in environmental pollution, high in efficiency, independent of slurry performance and high in informatization and automation degree, the thickness of the pile bottom sediment of the cast-in-place pile can be accurately detected in the cleaning process, and the device is suitable for sediment of various media; the influence of factors such as sediment transparency is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning sediment at the bottom of cast-in-place piles, and particularly to an intelligent cleaning system and method for sediment at the bottom of cast-in-place piles driven by air pressure difference. Background Art

[0002] In modern engineering, cast-in-place piles are widely used as a common foundation form. However, the generation of sediment at the bottom of the piles during construction is inevitable. The generation of sediment in cast-in-place piles mainly stems from the precipitation of some drill cuttings with the reduction of the mud circulation speed during mud slurry wall protection, the residue of drill cuttings due to incomplete hole cleaning, and the re-suspension of sediment during concrete pouring without timely covering. Its composition includes drill cuttings such as rock and soil broken by the drill bit during hole formation, solid particles adsorbed in the mud, and sundries mixed in during construction. Excessive sediment at the bottom of cast-in-place piles will seriously threaten the pile foundation and reduce the bearing capacity of the pile. Due to the reduction of the contact area between the pile and the soil body caused by the sediment and its large compressibility, the end bearing capacity decreases and the settlement increases. It will also affect the settlement characteristics of the pile, resulting in an increase in the settlement amount and unevenness, causing problems such as building inclination and cracking. At the same time, it will increase the construction risk, affect the integrity of the pile, and cause concrete pouring pipe blockage.

[0003] However, the existing sediment cleaning methods have many deficiencies, such as low hole cleaning efficiency, easy to cause hole collapse, and difficult to accurately measure the sediment height, resulting in great losses. Summary of the Invention

[0004] Aiming at the problems of low cleaning efficiency, poor effect, difficult to accurately detect the sediment thickness, and large environmental impact in the prior art for cleaning sediment at the bottom of cast-in-place piles, the present invention provides an intelligent cleaning system and method for sediment at the bottom of cast-in-place piles driven by air pressure difference. The device realizes efficient, accurate, and environmental-friendly sediment cleaning through the principle of internal and external air pressure difference, combined with a multi-stage filtration system and intelligent control technology.

[0005] The present invention provides an intelligent cleaning system for sediment at the bottom of cast-in-place piles driven by air pressure difference, including a small bridge crane, an intelligent sediment cleaning device at the bottom of the pile, a movable air compressor, and a movable motor; a slag storage bin, a slag suction pipe, and a pneumatic valve; the intelligent sediment cleaning device at the bottom of the pile is suspended and connected to the winch system on the small bridge crane through a hook; the movable air compressor and the movable motor are placed on both sides of the small bridge crane; the slag storage bin is located inside the intelligent sediment cleaning device at the bottom of the pile, and a slag suction pipe is arranged inside the slag storage bin. The disturbed mud is sucked into the slag storage bin by reducing the internal air pressure. A pneumatic valve is installed inside the slag suction pipe, and the pneumatic valve can be opened and closed according to a set program to balance the internal and external air pressures; the pneumatic valve is fixedly connected to the air compressor.

[0006] Further, the slag storage bin further includes a water level detector and an in-bin fiber optic vision sensor. The water level detector is installed at the top of the slag storage bin for detecting the water level height. An in-bin fiber optic vision sensor is installed below the water level detector for detecting the thickness of the sediment in the bin. Both the water level detector and the in-bin fiber optic vision sensor are connected to a control computer through cable wires.

[0007] Further, a primary filter screen, a fine filter screen, and a depth filter screen are sequentially installed from top to bottom at the bottom of the in-bin fiber optic vision sensor. There are spiral threads designed between the filter screens and the barrel wall, and the filter screens can be quickly replaced according to different sediment requirements to filter sediment with different particle sizes. A bin-in fiber optic vision sensor is installed at the bottom of both the primary filter screen and the fine filter screen. The in-bin fiber optic vision sensor is connected to a computer through a cable wire for detecting the thickness of the sediment in the bin, facilitating the slag cleaning operation for on-site workers.

[0008] Further, an air outlet is provided at the top of the slag storage bin. The air outlet is connected to a movable air compressor through an air delivery pipe. The air outlet is connected to a control computer and a movable motor through cable wires. The movable air compressor is used to balance the pressure in the slag storage bin and the mud at the bottom of the pile, and provide power for the pneumatic rotary machine and the pneumatic disturbance fan. The control computer is used to digitally display the thickness of the sediment at the bottom of the pile, the power of the movable air compressor, the height of the water level in the slag storage bin from the top, and the rotation speed of the pneumatic disturbance fan, and graphically display the height of the sediment in the slag storage bin.

[0009] The hoisting system in the small bridge crane is connected to the movable motor and the control computer on the left, and to the movable air compressor on the right. One end of the air delivery pipe is installed at the top of the intelligent sediment cleaning device at the bottom of the pile, and the other end is connected to the movable air compressor. The rest is wound in the hoisting system of the small bridge crane, and the air delivery pipe is lowered to the bottom of the pile through the rotation of the hoisting system. All the cable wires and air delivery pipes enter and exit through the air outlet.

[0010] The connection method of the slag suction pipe to the pneumatic valves, the pneumatic rotary machine, and the pneumatic disturbance fan in the drainage port with the movable compressor: The air delivery pipe from top to bottom is divided into two pipes at the top of the slag storage bin. One of the pipes is fixedly connected to the air outlet at the top of the slag storage bin. The inside of the air outlet is divided into two pipes. The first pipe pressurizes the slag storage bin, and the second pipe fits the slag suction pipe to reach the bottom and is again divided into two pipes. One of the pipes is connected to the pneumatic valves in the pneumatic valve and the drainage port to provide power for the pneumatic valves, and the other pipe provides power for the pneumatic rotary machine; the other pipe from top to bottom fits the outer wall of the slag storage bin and extends vertically to the pneumatic disturbance fan to directly provide power for the pneumatic disturbance fan.

[0011] Further, the pile bottom sediment thickness detection device is fixedly installed at the bottom of the slag storage bin. There are 4 pile bottom sediment thickness detection devices in total, with every two as a group and symmetrically distributed. A pneumatic rotary machine is connected to a group of pile bottom sediment detection devices to provide power for them. The sediment thickness detection device is connected to a control computer through a cable to detect the thickness of the sediment at the bottom of the cast-in-place pile.

[0012] Further, a pneumatic rotary machine is installed at the top of the sediment thickness detection device and is connected to a movable air compressor through an air delivery pipe to provide power for the pile bottom sediment thickness detection device.

[0013] Further, a support frame is installed at the lower part of the slag storage bin. The support frame is composed of several support rods. A pneumatic disturbance fan is installed at the top of the support frame. The pneumatic disturbance fan is connected to a movable air compressor through an air delivery pipe to disturb the sediment in the mud at the pile bottom.

[0014] Further, a drain outlet is provided at the bottom of the slag storage bin. By increasing the internal pressure, the filtered mud is discharged from the drain outlet. A pneumatic valve is installed inside the drain outlet. The pneumatic valve is connected to a movable air compressor through an air delivery pipe and can be opened and closed according to a set program to balance the internal and external air pressures.

[0015] Further, a hidden handle is fixedly installed on the outside of the slag storage bin to facilitate the rapid cleaning work of the slag storage bin.

[0016] The present invention also provides a cleaning method for an intelligent cast-in-place pile bottom sediment cleaning system driven by air pressure difference, including the following steps:

[0017] S1. Install the intelligent long cast-in-place pile bottom sediment cleaning device at the orifice of the cast-in-place pile, and connect the movable motor and the movable air compressor;

[0018] S2. Fix and install an air delivery pipe and a cable at the opening of the top of the slag storage bin;

[0019] S3. Set the pile hole depth and diameter through the control computer, set the specified required thickness of the pile bottom sediment, and set the sensor parameters;

[0020] S4. The operation control computer issues an instruction to start slag cleaning. The small bridge crane lowers the sediment cleaning device to the bottom of the pile according to the set program. During the lowering process, the movable air compressor pressurizes the inside of the storage bin through the air outlet at the top of the storage bin. The control computer controls the flow rate to balance the internal and external pressures so that the air pressure in the bin is slightly less than the pressure in the mud. After the sediment cleaning device is lowered to the bottom of the pile, the movable air compressor drives the pneumatic disturbance fan to disturb the sediment at the bottom of the pile. The rotation speed of the disturbance fan can be adjusted in the control computer according to the sediment thickness in different underlying layers. After the disturbance for a set time, the control computer controls the pneumatic valve in the slag suction pipe to open. The disturbed mud will be sucked into the storage bin through the slag suction pipe and filtered through the primary filter screen, fine filter screen and depth filter screen. After the water level detector at the top of the storage bin detects that the water level height reaches the set position, the control computer opens the pneumatic valve in the drain outlet at the bottom of the storage bin and closes the pneumatic valve in the slag suction pipe. The movable air compressor pressurizes the inside of the bin and discharges the filtered mud through the drain outlet from the storage bin. After multiple cycles, when the sediment thickness on the three-layer filter screen detected by the fiber optic vision sensor in the bin reaches the set height, the steps of discharging the mud are repeated to make the inside of the bin in a waterless environment. The bridge crane lifts the sediment cleaning device. During the lifting process, the movable air compressor decompresses the inside of the bin through the air outlet at the top of the storage bin. The control computer controls the flow rate to balance the internal and external pressures until the sediment cleaning device reaches the orifice. The above process can view the data parameters and operation process in real time through the control computer.

[0021] S5. After the first cleaning is completed, move out the bottom support frame, open the storage bin to clean the sediment to an open space, close the storage bin door, and repeat the above steps for the next cycle until the sediment height at the bottom of the pile set in the control computer is reached.

[0022] S7. Connect the control computer through a mobile phone or laptop computer, export the data and analyze the sediment height to calculate the finally cleaned sediment volume.

[0023] An intelligent cast-in-place pile bottom sediment cleaning system and method based on air pressure difference drive provided by an embodiment of the present invention forms a pressure difference at the bottom of the pile by using the principle of internal and external pressure differences. The mud will be sucked into the storage bin through the slag suction pipe and filtered through the filter screen. The movable air compressor pressurizes the inside of the bin and discharges the filtered mud through the drain outlet from the storage bin, overcoming the deficiencies of the existing methods, and having the advantages of high hole cleaning efficiency, good effect, simple equipment, and small damage to the hole wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structure of an intelligent long cast-in-place pile bottom sediment cleaning device provided by an embodiment of the present invention Figure 1 ;

[0025] Figure 2 is a three-dimensional structure diagram of the small bridge crane provided by an embodiment of the present invention;

[0026] Figure 3 This is a three-dimensional structure diagram of the intelligent cleaning device for pile bottom sediment provided by the embodiment of the present invention;

[0027] In the figure: 1 - small bridge crane; 2 - intelligent cleaning device for pile bottom sediment; 3 - movable air compressor; 4 - movable motor; 201 - slag storage bin; 202 - slag suction pipe; 203 - pneumatic valve; 204 - water level detector; 205 - in - bin fiber optic vision sensor; 206 - primary filter screen; 207 - fine filter screen; 208 - depth filter screen; 209 - support frame; 210 - pile bottom sediment thickness detection device; 211 - pneumatic rotary machine; 212 - pneumatic disturbance fan; 213 - drain outlet. Specific embodiments

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present 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 only used to explain the present invention and are not used to limit the present invention.

[0029] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0030] Such as Figures 1 - 3As shown in the figure, a structural diagram of an intelligent device for cleaning sediment at the bottom of a long large-diameter cast-in-place pile according to an embodiment of the present invention includes a small bridge crane 1, an intelligent sediment cleaning device 2 at the bottom of the pile, a movable press 3, and a movable motor 4. The intelligent sediment cleaning device 2 at the bottom of the pile is installed at the bottom of the small bridge crane 1. The slag suction pipe 202 is installed in the middle of the slag storage bin 201. An air-operated valve 203 is installed inside the slag suction pipe 202. A primary filter screen 206, a fine filter screen 207, and a depth filter screen 208 are installed around the slag suction pipe 202. An optical fiber visual sensor 205 inside the bin is installed at the bottoms of the primary filter screen 206 and the fine filter screen 207. The optical fiber visual sensor 205 inside the bin is connected to a control computer through a cable line passing through the top air outlet of the slag storage bin. The air-operated valve 203 is connected to the movable press 3 through an air pipe passing through the top air outlet of the slag storage bin. A water level detector 204 is installed at the top of the slag storage bin 201. The optical fiber visual sensor 205 inside the bin is installed below the water level detector 204. The water level detector 204 is connected to a control computer through a cable line passing through the top air outlet of the slag storage bin. A drain port 213 is designed at the bottom of the slag storage bin 201. An air-operated valve is installed inside the drain port 213. The air-operated valve is connected to the movable press 3 through an air pipe passing through the top air outlet of the slag storage bin. A sediment thickness detection device 210 at the bottom of the pile is installed at the bottom of the slag storage bin 201. The sediment thickness detection device 210 is connected to a pneumatic rotary machine 211 through an air pipe passing through the top air outlet of the slag storage bin. The pneumatic rotary machine 211 is fixedly installed at the bottom of the slag storage bin 201 and is connected to the movable press 3 through an air pipe passing through the top air outlet of the slag storage bin. The sediment thickness detection device 210 is connected to a control computer through a cable line passing through the top air outlet of the slag storage bin. A support frame 209 is installed at the bottom of the slag storage bin 201. An air-operated disturbance fan 212 is installed at the top of the support frame 209. The air-operated disturbance fan 212 is connected to the movable press 3 through an air pipe outside the slag storage bin. Among them, the top air outlet of the slag storage bin 201 is connected to the movable press 3 through an air pipe. The top air outlet of the slag storage bin 201 is connected to the movable motor 4 and the control computer through a cable line, used for digitally presenting the sediment thickness at the bottom of the pile, the power of the movable press, the height of the water level in the slag storage bin from the top, and the rotation speed of the air-operated disturbance fan, and graphically presenting the sediment height in the slag storage bin. A filter screen (206-208) is installed in the middle of the slag storage bin 201. There are spiral threads designed between the filter screen (206-208) and the cylinder wall, and the filter screen can be quickly replaced according to different sediment requirements to filter sediment with different particle sizes.

[0031] An intelligent cleaning device and method for sediment at the bottom of long and large cast-in-place piles provided by an embodiment of the present invention form a pressure difference at the bottom of the pile by utilizing the principle of internal and external pressure difference. Mud will be sucked into the slag storage bin through the slag suction pipe and filtered through a filter screen. A movable air compressor pressurizes the inside of the bin to discharge the filtered mud out of the slag storage bin through the drain port. The thickness of the sediment at the bottom of the pile, the air pressure intensity in the slag bin, the power of the movable press, the height of the water level in the slag storage bin from the top, and the rotation speed of the pneumatic disturbance fan can be digitally presented, and the height of the sediment in the slag storage bin can be graphically presented, overcoming the deficiencies of existing methods and having the advantages of high hole cleaning efficiency, good effect, simple equipment, and little damage to the hole wall.

[0032] In an example of the present invention, for an intelligent cleaning device for sediment at the bottom of long and large cast-in-place piles, it is characterized in that a hidden handle is fixedly installed on the outside of the slag storage bin 201 to facilitate the rapid cleaning work of the slag storage bin.

[0033] As Figure 3 shown, as a preferred embodiment of the present invention, for an intelligent cleaning device for sediment at the bottom of long and large cast-in-place piles, it is characterized in that an opening is provided at the top of the slag storage bin 201, and the opening is connected to a movable press 3 through an air delivery pipe to balance the pressure in the slag storage bin 201 and the mud at the bottom of the pile, and provide power for the pneumatic rotary machine 211 and the pneumatic disturbance fan 212.

[0034] As Figure 3 shown, as a preferred embodiment of the present invention, for an intelligent cleaning device for sediment at the bottom of long and large cast-in-place piles, it is characterized in that an air outlet is provided at the top of the slag storage bin 201, and the opening is connected to a control computer through a cable to digitally present the thickness of the sediment at the bottom of the pile, the air pressure intensity in the slag bin, the power of the movable press, the height of the water level in the slag storage bin from the top, and the rotation speed of the pneumatic disturbance fan, and graphically present the height of the sediment in the slag storage bin.

[0035] As Figure 3 shown, as a preferred embodiment of the present invention, for an intelligent cleaning device for sediment at the bottom of long and large cast-in-place piles, it is characterized in that a slag suction pipe 202 is fixedly installed inside the slag storage bin 201 to suck the disturbed mud into the slag storage bin 201 by reducing the internal air pressure.

[0036] As Figure 3 shown, as a preferred embodiment of the present invention, for an intelligent cleaning device for sediment at the bottom of long and large cast-in-place piles, it is characterized in that a pneumatic valve 203 is installed inside the slag suction pipe 202, and the pneumatic valve 203 can be opened and closed according to a set program to balance the internal and external air pressures.

[0037] As Figure 3As shown in the figure, as a preferred embodiment of the present invention, for an intelligent device for cleaning sediment at the bottom of a long bored pile, it is characterized in that a primary filter screen 206, a fine filter screen 207, and a depth filter screen 208 are fixedly installed inside the slag storage bin 201. There are spiral threads designed between the filter screens and the barrel wall, and the filter screens can be quickly replaced according to different sediment requirements to filter sediment with different particle sizes.

[0038] As Figure 3 shown in the figure, as a preferred embodiment of the present invention, for an intelligent device for cleaning sediment at the bottom of a long bored pile, it is characterized in that an in - bin fiber optic vision sensor 205 is installed on the bottom bin wall 201 of the primary filter screen 206 and the fine filter screen 207. The in - bin fiber optic vision sensor 205 is fixedly connected to a control computer, which is used to detect the thickness of the sediment in the bin, facilitating the slag cleaning operation for on - site workers.

[0039] As Figure 3 shown in the figure, as a preferred embodiment of the present invention, for an intelligent device for cleaning sediment at the bottom of a long bored pile, it is characterized in that a water level detector 204 is fixedly installed on the top of the slag storage bin 201. The water level detector 204 is fixedly connected to a control computer, which is used to detect the water level height.

[0040] As Figure 3 shown in the figure, as a preferred embodiment of the present invention, for an intelligent device for cleaning sediment at the bottom of a long bored pile, it is characterized in that an in - bin fiber optic vision sensor 205 is installed on the lower bin wall 201 of the water level detector 204, which is used to detect the thickness of the sediment in the bin.

[0041] As Figure 3 shown in the figure, as a preferred embodiment of the present invention, for an intelligent device for cleaning sediment at the bottom of a long bored pile, it is characterized in that a drain port 213 is designed at the bottom of the slag storage bin 201. By increasing the internal pressure, the filtered mud is discharged from the drain port 213.

[0042] As Figure 3 shown in the figure, as a preferred embodiment of the present invention, for an intelligent device for cleaning sediment at the bottom of a long bored pile, it is characterized in that a pneumatic valve is installed inside the drain port 213. The pneumatic valve is connected to a movable press 3, which can be opened and closed according to a set program to balance the internal and external air pressures.

[0043] As Figure 3 shown in the figure, as a preferred embodiment of the present invention, for an intelligent device for cleaning sediment at the bottom of a long bored pile, it is characterized in that a sediment thickness detection device 210 is installed at the bottom of the slag storage bin 201. The sediment thickness detection device 210 is fixedly connected to a control computer, which is used to detect the thickness of the sediment at the bottom of the bored pile.

[0044] As Figure 3 shown, as a preferred embodiment of the present invention, for an intelligent long bored cast-in-place pile bottom sediment cleaning device, it is characterized in that a pneumatic rotary machine 211 is installed at the top of the sediment thickness detection device 210, which is fixedly connected to the movable press 3 to provide power for the pile bottom sediment thickness detection device.

[0045] As Figure 3 shown, as a preferred embodiment of the present invention, for an intelligent long bored cast-in-place pile bottom sediment cleaning device, it is characterized in that a support frame 209 is installed at the lower part of the slag storage bin 201.

[0046] As Figure 3 shown, as a preferred embodiment of the present invention, for an intelligent long bored cast-in-place pile bottom sediment cleaning device, it is characterized in that a pneumatic disturbance fan 212 is installed at the top of the support frame 209, and the pneumatic disturbance fan 212 is connected to the movable press 3 to disturb the sediment in the pile bottom mud.

[0047] A sediment cleaning method for an intelligent long bored cast-in-place pile bottom sediment cleaning device includes the following steps:

[0048] S1. Install the intelligent long bored cast-in-place pile bottom sediment cleaning device 2 at the orifice of the bored pile, and connect the movable motor 4 and the movable press 3;

[0049] S2. Fix and install an air delivery pipe and a cable at the opening at the top of the slag storage bin 201;

[0050] S3. Set the pile hole depth and diameter through the control computer, set the specified required thickness of the pile bottom sediment, and set the sensor parameters;

[0051] S4. The operation control computer issues an instruction to start slag cleaning. The small bridge crane 1 lowers the sediment cleaning device 2 to the bottom of the pile according to the set program. During the lowering process, the movable press 3 pressurizes the inside of the storage bin 201 through the air outlet at the top of the storage bin 201. The control computer controls the flow rate to balance the internal and external pressures so that the pressure inside the bin 201 is slightly less than the pressure in the mud. After the sediment cleaning device 2 is lowered to the bottom of the pile, the movable press 3 drives the pneumatic disturbance fan 212 to disturb the sediment at the bottom of the pile. The rotation speed of the disturbance fan 212 can be adjusted in the control computer according to the sediment thickness in different underlying layers. After reaching the set disturbance time, the control computer controls the pneumatic valve 203 in the slag suction pipe 202 to open. The disturbed mud will be sucked into the storage bin 201 through the slag suction pipe 202 and filtered by the primary filter screen 206, the fine filter screen 207, and the depth filter screen 208. After the water level detector 204 at the top of the storage bin 201 detects that the water level height reaches the set position, the control computer opens the pneumatic valve at the bottom drainage port 213 of the storage bin 201 and closes the pneumatic valve 203 in the slag suction pipe 202. The movable press 3 pressurizes the inside of the bin 201 to discharge the filtered mud through the drainage port 213 out of the storage bin 201. After multiple cycles, when the sediment thickness on the three-layer filter screen (206 - 208) is detected by the fiber optic vision sensor 205 inside the bin to reach the set height, the steps of discharging the mud are repeated to make the inside of the bin 201 in a water-free environment. The bridge crane 1 lifts the sediment cleaning device 2. During the lifting process, the movable press 3 decompresses the inside of the storage bin 201 through the air outlet at the top of the storage bin 201. The control computer controls the flow rate to balance the internal and external pressures until the intelligent sediment cleaning device 2 at the bottom of the pile reaches the orifice. The above process can view the data parameters and operation process in real time through the control computer;

[0052] S5. After the first cleaning is completed, move out the bottom support frame 209, open the storage bin 201 to clean the sediment to an open space, close the storage bin door, and repeat the above steps for the next cycle until the sediment height at the bottom of the pile set in the control computer is reached;

[0053] S7. Connect to the control computer through a mobile phone or laptop computer, export the data and analyze the sediment height to calculate the finally cleaned sediment volume.

[0054] In this embodiment, the device utilizes the principle of internal and external air pressure difference, combines a multi-stage filtration system with intelligent control technology, and achieves efficient, precise, and environmentally friendly sediment cleaning. The device can significantly improve the hole cleaning efficiency, is applicable to sediments in various media, and is not affected by factors such as sediment transparency. The pile bottom sediment thickness detection device 210 and the in-chamber fiber optic vision sensor 205 achieve precise detection of the pile bottom sediment thickness of the cast-in-place pile, providing reliable data support for the sediment cleaning operation. The device causes less environmental pollution, does not rely on mud properties, and has high environmental friendliness. The intelligent control system realizes the automatic operation of the device through a control computer, monitors and adjusts the working states of each component in real time, and significantly improves the automation degree of the sediment cleaning process. The multi-stage filtration system can quickly replace the filter screen according to different sediment requirements, adapts to the filtration requirements of sediments with different particle sizes, and has wide applicability.

[0055] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

[0056] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An intelligent cleaning system for sediment at the bottom of cast-in-place piles driven by air pressure difference, comprising a small bridge crane (1), an intelligent cleaning device for sediment at the bottom of piles (2), a movable air compressor (3), and a movable motor (4); characterized in that, It also includes a slag storage bin (201), a slag suction pipe (202), and a pneumatic valve (203); The intelligent cleaning device for pile bottom sediment (2) is suspended and connected to the hoisting system on the small bridge crane (1) through a hook; The movable air compressor (3) and the movable motor (4) are placed on both sides of the small bridge crane; The slag storage bin (201) is located inside the intelligent cleaning device for pile bottom sediment (2). One slag suction pipe (202) is arranged inside the slag storage bin, and a pneumatic valve (203) is installed inside the slag suction pipe; the pneumatic valve (203) is fixedly connected to an air pressure pump.

2. The intelligent cast-in-place pile bottom sediment cleaning system driven by air pressure difference according to claim 1, wherein The slag storage bin (201) further includes a water level detector (204) and an in - bin optical fiber vision sensor (205). The water level detector (204) is installed at the top of the slag storage bin, and the in - bin optical fiber vision sensor (205) is installed below the water level detector (204). Both the water level detector (204) and the in - bin optical fiber vision sensor (205) are connected to a control computer through cable wires.

3. The intelligent cleaning system for sediment at the bottom of bored cast-in-place piles driven by air pressure difference according to claim 2, wherein At the bottom of the in - bin optical fiber vision sensor (205), a primary filter screen (206), a fine filter screen (207), and a depth filter screen (208) are installed in sequence from top to bottom. At the bottom of both the primary filter screen (206) and the fine filter screen (207), an in - bin optical fiber vision sensor (205) is installed. The in - bin optical fiber vision sensor (205) is connected to a computer through cable wires.

4. The intelligent cast-in-place pile bottom sediment cleaning system driven by air pressure difference according to claim 1, characterized in that, At the top of the slag storage bin (201), an air outlet is provided. An air delivery pipe and cable wires are fixed to the air outlet. The air delivery pipe is connected to the movable air compressor (3), and the cable wires are connected to the control computer and the motor (4).

5. The intelligent cast-in-place pile bottom sediment cleaning system driven by air pressure difference according to claim 1, characterized in that, At the bottom of the slag storage bin (201), a pile bottom sediment thickness detection device (210) is fixedly installed. There are 4 pile bottom sediment thickness detection devices (210) in total. Every two form a group and are symmetrically distributed. The sediment thickness detection device (210) is connected to a control computer through cable wires and is used to detect the thickness of pile bottom sediment of the cast - in - place pile.

6. The intelligent cleaning system for sediment at the bottom of bored piles driven by air pressure difference according to claim 5, wherein At the top of the sediment thickness detection device (210), a pneumatic rotary machine (211) is installed and connected to the movable air compressor (3) through an air delivery pipe.

7. The intelligent cleaning system for sediment at the bottom of bored cast-in-place piles driven by air pressure difference according to claim 1, wherein Below the slag storage bin (201), a support frame (209) is installed. The support frame is composed of several support rods. At the top of the support frame (209), a pneumatic disturbance fan (212) is installed. The pneumatic disturbance fan (212) is connected to the movable air compressor (3) through an air delivery pipe.

8. The intelligent cast-in-place pile bottom sediment cleaning system driven by air pressure difference according to claim 1, characterized in that At the bottom of the slag storage bin (201), a drain port (213) is provided. A pneumatic valve (203) is installed inside the drain port (213). The pneumatic valve (203) is connected to the movable air compressor through an air delivery pipe.

9. According to the intelligent cleaning system for pile bottom sediment of cast - in - place piles driven by air pressure difference as claimed in claim 1, a hidden handle is fixedly installed on the outer side of the slag storage bin.

10. The method of using the intelligent cast-in-place pile bottom sediment cleaning system driven by air pressure difference as described in claims 1-9, characterized in that, It includes the following steps: S1. Install the cleaning device for pile bottom sediment of the cast - in - place pile at the orifice of the cast - in - place pile hole, and connect the movable motor (4), the control computer, and the movable air compressor (3); S2. Fix and install an air delivery pipe and cable wires at the opening of the top of the slag storage bin; S3. Set the pile hole depth and diameter through the control computer, set the specified thickness of the sediment at the pile bottom, and set the sensor parameters; S4. Operate the control computer to issue an instruction to start cleaning the sediment. The small bridge crane (1) lowers the intelligent sediment cleaning device at the pile bottom (2) to the pile bottom according to the set program. During the lowering process, the movable air compressor (3) pressurizes the inside of the storage bin (201) through the air outlet at the top of the storage bin (201). The control computer controls the flow rate to balance the internal and external pressures so that the air pressure in the bin is slightly less than the pressure in the mud. After the intelligent sediment cleaning device at the pile bottom (2) is lowered to the pile bottom, the movable air compressor (3) drives the pneumatic disturbance fan (212) to disturb the sediment at the pile bottom. The rotation speed of the disturbance fan (212) can be adjusted in the control computer according to the sediment thickness in different underlying layers. After the disturbance for a set time, the control computer controls the pneumatic valve (203) in the slag suction pipe (202) to open. The disturbed mud will be sucked into the storage bin (201) through the slag suction pipe (202) and filtered through the primary filter screen (206), fine filter screen (207) and depth filter screen (208). After the water level detector (204) at the top of the storage bin (201) detects that the water level height reaches the set position, the control computer opens the pneumatic valve (204) in the drain outlet (213) at the bottom of the storage bin (201) and closes the pneumatic valve (203) in the slag suction pipe (202). The movable air compressor (3) pressurizes the inside of the bin to discharge the filtered mud through the drain outlet (213) from the storage bin (201). After multiple cycles, when the sediment thickness on the three-layer filter screen is detected by the fiber optic vision sensor (205) in the bin to reach the set height, repeat the step of discharging the mud to make the inside of the bin in a water-free environment. The bridge crane lifts the intelligent sediment cleaning device at the pile bottom (2). During the lifting process, the movable air compressor (3) decompresses the inside of the storage bin (201) through the air outlet at the top of the storage bin (201). The control computer controls the flow rate to balance the internal and external pressures until the sediment cleaning device reaches the hole opening. The above process can view the data parameters and operation process in real time through the control computer; S5. After the first cleaning is completed, move the small bridge crane (1) out of the hole opening, open the storage bin door to clean the sediment to an open space, close the storage bin door, and repeat the above steps for the next cycle until the sediment height at the pile bottom set in the control computer is reached; S7. Connect to the control computer through a mobile phone or laptop computer, export the data and analyze the sediment height to calculate the finally cleaned sediment volume.

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