An auxiliary hole cleaning device and method for bored cast-in-place piles

Abstract

The present invention relates to the technical field of drilling construction, in particular to an auxiliary hole cleaning device and method for bored piles, comprising an exploration tube, and also comprising: a rotating tube, the rotating tube being rotatably connected to the bottom of the exploration tube, a hole expanding ring, the hole expanding ring being sleeved on the surfaces of the exploration tube and the rotating tube, a sealing block being provided below the sealing ring, the top of the sealing block being fixedly connected to a circular rod, the top end of the circular rod extending from the inside of the sealing ring to the top of the sealing ring and then being fixedly connected to a plurality of fixing bars; when the mud and gravel inside the borehole are pumped and cleaned, the present invention expands the inner wall of the borehole through the hole expanding ring, forms a mud skin at the hole wall, and prevents the borehole diameter from changing, thereby ensuring the effect of bored pile pouring, and improves the adhesion stability of the mud skin on the expanded hole wall through the rotating tube and the sprayed mud, reduces the flow sedimentation of the mud, and thus improves the effect after the mud skin is formed.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling construction, and in particular to an auxiliary hole cleaning device and method for bored cast-in-place piles. Background Art

[0002] Bored cast-in-place piles refer to piles made by forming pile holes in the foundation soil at the construction site through mechanical drilling, steel pipe squeezing or manual excavation, and placing steel cages and pouring concrete inside. Depending on the hole-forming method, cast-in-place piles can be divided into several categories, such as sunken pipe cast-in-place piles, bored cast-in-place piles and excavated cast-in-place piles.

[0003] The patent document with announcement number CN115012416B announces a bored pile hole cleaning device, which includes a sand and gravel pump movably installed above the pile hole, the bottom of the sand and gravel pump is connected to a pump pipe extending into the pile hole, the top of the sand and gravel pump is connected to a slag discharge pipe, and the slag discharge pipe is provided with a recovery mechanism at one end away from the sand and gravel pump. The recovery mechanism includes a recovery trough, and a screening component for screening mud and slag is provided in the recovery trough.

[0004] When existing hole cleaning equipment is working, the mud in the borehole is usually pumped out and then re-sprayed on the hole wall. After the mud is sprayed on the hole wall surface and solidifies, the thickness of the hole wall will increase, thereby reducing the borehole diameter and affecting the pouring specifications of the bored pile. The mud itself has a certain fluidity. It is difficult to ensure that the mud can be stably attached to the hole wall by spraying. The mud flows downward along the hole wall under the action of gravity, causing the mud to accumulate at the bottom of the borehole. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an auxiliary hole cleaning device and method for bored piles.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an auxiliary hole cleaning device for bored piles, comprising a probe pipe and:

[0007] A rotating tube, the rotating tube being rotatably connected to the bottom of the probe tube, the diameters of the rotating tube and the probe tube being the same as the inner diameter of the borehole, and a sealing ring being fixedly connected to the interior of the rotating tube;

[0008] A reaming ring, which is sleeved on the surface of the probe tube and the rotating tube, a sealing block is provided below the sealing ring, a round rod is fixedly connected to the top of the sealing block, the top of the round rod extends from the inside of the sealing ring to the top of the sealing ring and is then fixedly connected to a plurality of fixing bars, a plurality of movable grooves are opened on the surface of the rotating tube, one end of the fixing bar extends into the corresponding movable groove and is then fixedly connected to the inner wall of the reaming ring;

[0009] A spraying tank is provided on the rotating tube and is located inside the reaming ring;

[0010] A pumping assembly, the pumping assembly is used to pump the mud inside the borehole and return it after filtering;

[0011] A rotating assembly, the rotating assembly being used to drive the rotation of the reaming ring;

[0012] A lifting assembly is used to drive the reaming ring to vertically lift and lower on the rotating pipe.

[0013] Preferably, a first receiving groove is provided on the rotating tube. Before the lifting assembly drives the reaming ring to rise, the first receiving groove is located inside the reaming ring. An arc-shaped plate is slidably connected to the inside of the first receiving groove. The top of the sealing ring is fixedly connected to a connecting strip. One side of the connecting strip is fixedly connected to a limiting sleeve. A limiting pin is fixedly connected to the arc plate. One end of the limiting pin is slidably limited inside the limiting sleeve. A spring is provided inside the limiting sleeve. The spring is fixedly connected between the limiting pin and the connecting strip. A guiding slope is provided on the top of the arc plate.

[0014] Preferably, a second receiving groove is provided below the surface of the reaming ring, a mounting bracket is slidably connected to the interior of the second receiving groove, a contact roller is rotatably connected to the interior of the mounting bracket, a plurality of circular protrusions are fixedly connected to the surface of the contact roller, a first guide block is fixedly connected to the rotating tube, a second guide block is fixedly connected to the lower side of one side of the mounting bracket, the first guide block and the second guide block are both located between the mounting bracket and the rotating tube, the first guide block is located above the second guide block, and a guide slope is provided on the adjacent ends of the first guide block and the second guide block.

[0015] Preferably, the pumping assembly comprises:

[0016] A connecting pipe, the connecting pipe is fixedly connected to the upper side of the probe tube, and one end of the connecting pipe is fixedly connected to a circular shell;

[0017] a first delivery pipe, the first delivery pipe being fixedly connected to the circular shell, and the first delivery pipe being arranged opposite to the connecting pipe;

[0018] a second delivery pipe, the second delivery pipe being fixedly connected to the circular shell and located at the bottom of the circular shell;

[0019] A slurry storage tank is arranged on one side of the probe pipe, a vibrating screen is fixedly installed inside the slurry storage tank, a first sand and gravel pump and a second sand and gravel pump are fixedly installed on the top of the slurry storage tank, a first hose is fixedly connected between the feed end of the first sand and gravel pump and the first conveying pipe, the discharge end of the first sand and gravel pump is located above the vibrating screen, a second hose is fixedly connected between the discharge end of the second sand and gravel pump and the second conveying pipe, the feed end of the second sand and gravel pump is located in the slurry storage tank, and a conversion assembly is connected to the circular shell, and the conversion assembly is used to convert the connection between the first conveying pipe and the second conveying pipe.

[0020] Preferably, the conversion component includes:

[0021] A rotating block is rotatably connected to the interior of the circular shell. A connecting pipe is fixedly inserted into the rotating block, and both ends of the connecting pipe are in contact with the inner wall arc surface of the circular shell;

[0022] The swing cylinder is fixedly mounted on the circular shell, and the piston shaft of the swing cylinder is fixedly connected to the axis of one side of the rotating block.

[0023] Preferably, the lifting assembly includes:

[0024] A first connecting ring, the first connecting ring being fixedly connected to the probe tube and located above the reaming ring;

[0025] a second connecting ring, the second connecting ring being fixedly connected to the top of the reaming ring, the top of the second connecting ring being rotatably connected to a mating ring, the top of the mating ring being fixedly connected to a plurality of connecting pins, the connecting pins being slidably inserted into the first connecting ring;

[0026] A plurality of electric cylinders are fixedly mounted on the top of the first connecting ring, and piston shafts of the electric cylinders are fixedly connected to the top of the matching ring.

[0027] Preferably, the rotating assembly includes:

[0028] an outer gear ring, the outer gear ring being fixedly connected to a surface of the second connecting ring;

[0029] The motor is fixedly mounted on the matching ring, and a gear is fixedly connected to the output shaft of the motor, and the gear is meshed with the outer gear ring.

[0030] Preferably, the top end of the probe tube is fixedly connected to a flange, and a plurality of positioning holes are opened on the flange along the circumference.

[0031] Preferably, the bottom ends of the rotating tube and the sealing ring are both provided with guiding inclined surfaces, and the guiding inclined surfaces of the rotating tube and the sealing ring extend correspondingly.

[0032] A bored pile auxiliary hole cleaning method comprising the following steps:

[0033] Step 1: Fix the top of the probe tube on the crane, move the probe tube into the borehole through the crane, and the pumping assembly pumps the mud and sand inside the borehole;

[0034] Step 2: The lifting assembly drives the reaming ring to move upward, and the blocking block moves to the inside of the sealing ring and blocks the pump suction channel at the bottom end of the rotating tube. The spraying groove on the rotating tube is exposed below the reaming ring;

[0035] Step 3: The crane drives the probe tube to move in the opposite direction, and continues to pump the filtered mud back into the probe tube and the rotating tube through the action of the pumping assembly, and sprays it along the spraying trough to the expansion position of the borehole, and the rotating assembly drives the expansion ring to rotate.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. When the mud and gravel inside the borehole are pumped and cleaned, the present invention expands the inner wall of the borehole through the expansion ring, and the expansion ring moves to make way for the mud to fill the expansion position, forming a mud skin on the hole wall while preventing the borehole diameter from changing, ensuring the effect of the bored pile. The rotating tube is in rotational contact with the ejected mud, thereby improving the adhesion stability of the mud skin on the expanded hole wall, reducing the flow and sedimentation of the mud, and thus improving the effect after the mud skin is formed.

[0038] 2. The limit pin is squeezed by the elastic extension of the spring, so that one end of the limit pin moves inside the limit sleeve, thereby causing the arc plate to move toward the outside of the rotating tube along the sliding connection of the first receiving groove. When the arc plate rotates with the rotating tube, the mud in the expansion area is elastically squeezed through the outer arc surface of the arc plate, so that the mud is slightly compacted in the process of forming a mud skin inside the expansion area, thereby improving the smoothness of the mud skin surface and reducing the porosity of the mud skin.

[0039] 3. After the contact roller on the mounting frame moves to the outside of the reaming ring, it comes into contact with the inner wall of the reaming hole. When the reaming ring rotates through the rotating assembly, the contact roller revolves along with the reaming ring and rotates along the rotating connection of the mounting frame due to contact friction when contacting the inner wall of the reaming hole. The multiple circular protrusions on the surface of the contact roller form multiple circular depressions on the inner wall of the reaming hole during rotation. When the mud is located inside the reaming area, part of the mud enters the circular depressions on the inner wall of the reaming hole, thereby increasing the contact area and degree of fit between the inner wall of the reaming hole and the mud, and improving the stability of the mud skin after formation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the present invention;

[0041] Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement at point A;

[0042] Figure 3 This is a schematic diagram of the matching structure of the probe tube, the rotating tube and the expansion ring of the present invention;

[0043] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at point B in FIG.

[0044] Figure 5 It is a cross-sectional schematic diagram of the cooperation structure of the probe tube, the rotating tube and the expansion ring of the present invention;

[0045] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at position C in FIG;

[0046] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at D in FIG.

[0047] Figure 8 For the present invention Figure 6 A schematic diagram of the structure at E in FIG.

[0048] Figure 9 Schematic cross-section of the first matching structure of the circular housing, the rotating block and the connecting pipe of the present invention (the connecting pipe is connected to the connecting pipe and the first delivery pipe);

[0049] Figure 10 It is a cross-sectional schematic diagram of the second matching structure of the circular shell, the rotating block and the connecting pipe of the present invention (the connecting pipe is connected to the connecting pipe and the second delivery pipe).

[0050] Figure: 1, probe tube; 2, rotating tube; 3, sealing ring; 4, reaming ring; 5, blocking block; 6, circular rod; 7, fixing bar; 8, movable groove; 9, spraying groove; 10, first receiving groove; 11, curved plate; 12, connecting bar; 13, limiting sleeve; 14, limiting pin; 15, spring; 16, second receiving groove; 17, mounting bracket; 18, contact roller; 19, circular protrusion; 20, first guide block; 21, second guide block; 22, connecting pipe; 23, circular Shell; 24. First delivery pipe; 25. Second delivery pipe; 26. Slurry storage tank; 27. Vibrating screen; 28. First sand and gravel pump; 29. Second sand and gravel pump; 30. First hose; 31. Second hose; 32. Rotating block; 33. Connecting pipe; 34. Swinging cylinder; 35. First connecting ring; 36. Second connecting ring; 37. Matching ring; 38. Connecting pin; 39. Electric cylinder; 40. External gear ring; 41. Motor; 42. Gear; 43. Flange; 44. Positioning hole. DETAILED DESCRIPTION

[0051] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0052] like Figures 1 to 10 The auxiliary hole cleaning device for bored piles shown in the figure comprises a probe tube 1 and further comprises:

[0053] Rotating tube 2 is rotatably connected to the bottom of probe tube 1. The diameters of rotating tube 2 and probe tube 1 are the same as the inner diameter of the borehole. A sealing ring 3 (such as Figure 6 shown);

[0054] The reaming ring 4 is sleeved on the surface of the probe tube 1 and the rotating tube 2. A blocking block 5 is provided below the sealing ring 3. A round rod 6 is fixedly connected to the top of the blocking block 5. The top of the round rod 6 extends from the inside of the sealing ring 3 to the top of the sealing ring 3 and is fixedly connected to a plurality of fixing bars 7. A plurality of movable grooves 8 are opened on the surface of the rotating tube 2. One end of the fixing bar 7 extends to the inside of the corresponding movable groove 8 and is fixedly connected to the inner wall of the reaming ring 4;

[0055] A spraying tank 9 is provided on the rotating tube 2 and is located inside the reaming ring 4;

[0056] A pumping assembly is used to pump the mud inside the borehole and return it after filtering;

[0057] A rotating assembly, which is used to drive the rotation of the reaming ring 4;

[0058] A lifting assembly is used to drive the vertical lifting of the reaming ring 4 on the rotating tube 2;

[0059] When existing hole cleaning equipment is working, the mud in the borehole is usually pumped and then re-sprayed on the hole wall. After the mud is sprayed on the hole wall surface and solidifies, the thickness of the hole wall increases, thereby reducing the borehole diameter and affecting the pouring specifications of the bored pile. The mud itself has a certain fluidity. It is difficult to ensure that the mud can be stably attached to the hole wall by spraying. The mud flows downward along the hole wall under the action of gravity, causing the mud to accumulate at the bottom of the borehole.

[0060] Before cleaning the borehole, the top of the probe tube 1 is fixed on the crane, and the probe tube 1 is moved into the borehole by the crane. The rotating tube 2 at the bottom of the probe tube 1 first contacts the borehole, and when the probe tube 1 drives the rotating tube 2 to move into the borehole, the pumping assembly pumps the mud and sand inside the borehole, so that the mud and sand enter the rotating tube 2 and the probe tube 1 along the cavity of the sealing ring 3 and continue to be transported;

[0061] The diameters of the rotating tube 2 and the probe tube 1 are the same as the inner diameter of the borehole, and the reaming ring 4 is sleeved on the probe tube 1 and the rotating tube 2, so that when the reaming ring 4 moves synchronously into the borehole, the reaming ring 4 squeezes and reams the inner wall of the borehole;

[0062] When the rotating tube 2 moves to the bottom of the borehole, the mud and gravel inside the borehole are cleaned, and then the reaming ring 4 is driven by the action of the lifting assembly to move vertically upward along the surface of the probe tube 1 and the rotating tube 2. During the movement, the reaming ring 4 drives multiple fixing bars 7 to move upward inside the movable groove 8, so that the circular rod 6 and the blocking block 5 move upward synchronously, and the blocking block 5 moves to the inside of the sealing ring 3 and blocks the pumping channel at the bottom end of the rotating tube 2. When the reaming ring 4 moves upward, the spraying groove 9 on the rotating tube 2 is exposed under the reaming ring 4, and then the filtered mud is pumped back into the probe tube 1 and the rotating tube 2 through the action of the pumping assembly, and sprayed along the spraying groove 9 to the reaming position of the borehole;

[0063] The crane drives the probe tube 1 to move in the opposite direction in the borehole, and the rotating assembly drives the reaming ring 4 to rotate, and through the fixation of the reaming ring 4 and the fixing bar 7 and the limitation of the fixing bar 7 inside the movable groove 8, the rotating tube 2 rotates synchronously with the reaming ring 4, so that the spraying tank 9 rotates continuously and sprays the mud to the reaming area of the borehole, and the rotation of the rotating tube 2 is in rotational contact with the sprayed mud, so that the mud remains in a uniform suspension state in the reaming area of the borehole, ensuring that the fixed particles are effectively deposited on the surface of the reaming hole wall. When the rotating tube 2 rotates, the centrifugal force generated by the rotation of the rotating tube 2 causes the solid particles in the mud to diffuse toward the reaming hole wall, thereby enhancing the contact efficiency between the particles and the reaming hole wall, reducing the flow sedimentation of the mud, and improving the formation effect of the mud skin on the hole wall.

[0064] When the present invention is pumping and cleaning the mud and gravel inside the borehole, the inner wall of the borehole is expanded by the expansion ring 4, and the expansion ring 4 is moved to make way for the mud to fill the expansion position, forming a mud skin on the hole wall while preventing the borehole diameter from changing, ensuring the effect of the bored pile pouring, and rotating the rotating tube 2 in rotation with the ejected mud to improve the adhesion stability of the mud skin on the expanded hole wall, reduce the flow and sedimentation of the mud, and thus improve the effect after the mud skin is formed.

[0065] As a further embodiment of the present invention, a first receiving groove 10 (such as Figure 7As shown in the figure, before the lifting assembly drives the reaming ring 4 to rise, the first receiving groove 10 is located inside the reaming ring 4, and the interior of the first receiving groove 10 is slidably connected to the arc-shaped plate 11, and the top of the sealing ring 3 is fixedly connected to a connecting strip 12, one side of the connecting strip 12 is fixedly connected to a limiting sleeve 13, and a limiting pin 14 is fixedly connected to the arc-shaped plate 11. One end of the limiting pin 14 is slidably limited inside the limiting sleeve 13, and a spring 15 is provided inside the limiting sleeve 13. The spring 15 is fixedly connected between the limiting pin 14 and the connecting strip 12, and a guiding slope is provided on the top of the arc-shaped plate 11;

[0066] When the reaming ring 4 moves upward by the action of the lifting assembly, the spraying groove 9 on the rotating tube 2 is exposed under the reaming ring 4, and at the same time, the reaming ring 4 moves to the top of the first receiving groove 10. After the arc plate 11 loses the limiting extrusion of the inner wall of the reaming ring 4, the limiting pin 14 is squeezed by the elastic extension of the spring 15, so that one end of the limiting pin 14 moves inside the limiting sleeve 13, thereby causing the arc plate 11 to move toward the outside of the rotating tube 2 along the sliding connection of the first receiving groove 10. When the arc plate 11 rotates with the rotating tube 2, the mud in the reaming area is elastically squeezed by the outer arc surface of the arc plate 11, so that the mud is slightly compacted in the process of forming a mud skin inside the reaming area, thereby improving the smoothness of the mud skin surface and reducing the porosity of the mud skin;

[0067] When the reaming ring 4 moves downward, the bottom of the reaming ring 4 contacts and squeezes the guiding slope on the top of the arc plate 11, so that the arc plate 11 moves in the opposite direction along the first receiving groove 10 and returns to the inside of the first receiving groove 10, and squeezes the spring 15, so that the spring 15 is in an elastically compressed state.

[0068] As a further embodiment of the present invention, a second receiving groove 16 (such as Figure 8 As shown in the figure, the interior of the second receiving groove 16 is slidably connected to a mounting bracket 17, the interior of the mounting bracket 17 is rotatably connected to a contact roller 18, the surface of the contact roller 18 is fixedly connected to a plurality of circular protrusions 19, a first guide block 20 is fixedly connected to the rotating tube 2, and a second guide block 21 is fixedly connected to the lower side of the mounting bracket 17. The first guide block 20 and the second guide block 21 are both located between the mounting bracket 17 and the rotating tube 2, the first guide block 20 is located above the second guide block 21, and the adjacent ends of the first guide block 20 and the second guide block 21 are both provided with a guiding inclined surface;

[0069] When the reaming ring 4 moves upward by the action of the lifting assembly, the mounting frame 17 in the second receiving groove 16 moves upward synchronously with the reaming ring 4, and drives the second guide block 21 to move upward. The second guide block 21 contacts the first guide block 20 during the movement, and the guide inclined surfaces on the first guide block 20 and the second guide block 21 contact and squeeze, so that the second guide block 21 drives the mounting frame 17 to move and make way, so that the mounting frame 17 moves along the second receiving groove 16 to the outside of the reaming ring 4, and the contact roller 18 on the mounting frame 17 moves to the reaming ring 4. After the outside of the ring 4, it comes into contact with the inner wall of the reaming hole. When the reaming ring 4 rotates through the rotating assembly, the contact roller 18 revolves along with the reaming ring 4 and rotates along the rotating connection of the mounting frame 17 due to the contact friction when contacting the inner wall of the reaming hole. The multiple circular protrusions 19 on the surface of the contact roller 18 form multiple circular depressions on the inner wall of the reaming hole during the rotation. When the mud is located inside the reaming area, part of the mud enters the circular depressions on the inner wall of the reaming hole, thereby increasing the contact area and the degree of fit between the inner wall of the reaming hole and the mud, and improving the stability of the mud skin after it is formed.

[0070] When the reaming ring 4 moves downward by the action of the lifting assembly, the second guide block 21 moves downward and loses the contact and extrusion of the first guide block 20. When the reaming ring 4 performs the next reaming, the contact roller 18 is squeezed during the reaming process and drives the mounting frame 17 to automatically return to the inside of the second receiving groove 16, thereby resetting the contact roller 18.

[0071] As a further embodiment of the present invention, the pumping assembly comprises:

[0072] Connecting pipe 22 (such as Figure 2 and Figure 9 As shown), the connecting pipe 22 is fixedly connected to the upper side of the probe 1, and one end of the connecting pipe 22 is fixedly connected to the circular shell 23;

[0073] A first delivery pipe 24, which is fixedly connected to the circular shell 23 and is disposed opposite to the connecting pipe 22;

[0074] The second delivery pipe 25 is fixedly connected to the circular shell 23 and is located at the bottom of the circular shell 23;

[0075] A slurry storage tank 26 is provided on one side of the probe 1. A vibrating screen 27 is fixedly installed inside the slurry storage tank 26. A first sand and gravel pump 28 and a second sand and gravel pump 29 are fixedly installed on the top of the slurry storage tank 26. A first hose 30 is fixedly connected between the feed end of the first sand and gravel pump 28 and the first delivery pipe 24. The discharge end of the first sand and gravel pump 28 is located above the vibrating screen 27. A second hose 31 is fixedly connected between the discharge end of the second sand and gravel pump 29 and the second delivery pipe 25. The feed end of the second sand and gravel pump 29 is located in the slurry storage tank 26. A conversion assembly is connected to the circular shell 23. The conversion assembly is used to convert the connection between the first delivery pipe 24 and the second delivery pipe 25;

[0076] The first gravel pump 28 operates to allow the mud and gravel in the borehole to enter the rotating pipe 2 and the probe pipe 1, and then enter the first conveying pipe 24 along the connecting pipe 22. Then, the mud and gravel enter the feed end of the first gravel pump 28 through the first hose 30, and then are transported to the vibrating screen 27 along the discharge end of the first gravel pump 28. The vibrating screen 27 separates the mud and gravel, and allows the mud to enter the slurry storage tank 26 along the sieve holes on the surface of the vibrating screen 27, and the gravel is filtered and separated on the vibrating screen 27.

[0077] When the rotating pipe 2 moves to the bottom of the borehole and moves upward by the crane, the first sand and gravel pump 28 stops working, and the connection between the connecting pipe 22 and the first delivery pipe 24 is closed through the action of the conversion component, and the connecting pipe 22 is connected with the second delivery pipe 25. Then, the second sand and gravel pump 29 is operated, so that the feed end of the second sand and gravel pump 29 pumps the mud inside the slurry storage tank 26 into the second hose 31, and transports it along the second delivery pipe 25 to the inside of the connecting pipe 22, and finally re-enters the rotating pipe 2 and the probe pipe 1, and is sprayed out from the spray tank 9.

[0078] As a further embodiment of the present invention, the conversion assembly comprises:

[0079] Rotating block 32 (such as Figure 9 and Figure 10 As shown), the rotating block 32 is rotatably connected to the inside of the circular shell 23, and a connecting pipe 33 is fixedly inserted into the rotating block 32, and both ends of the connecting pipe 33 are in contact with the inner wall arc surface of the circular shell 23;

[0080] The swing cylinder 34 is fixedly mounted on the circular housing 23, and the piston shaft of the swing cylinder 34 is fixedly connected to the axis of one side of the rotating block 32;

[0081] When the two ends of the connecting pipe 33 are connected to the connecting pipe 22 and the first delivery pipe 24 respectively, the mud and gravel enter the connecting pipe 33 along the connecting pipe 22 and enter the first delivery pipe 24 along the connecting pipe 33. When the first sand and gravel pump 28 stops working, the piston shaft of the swing cylinder 34 rotates to drive the rotating block 32 to rotate inside the circular shell 23, and drives the connecting pipe 33 to rotate synchronously, so that the two ends of the connecting pipe 33 are connected to the connecting pipe 22 and the second delivery pipe 25 respectively (as shown in FIG. Figure 10 As shown), the screened mud flows along the second delivery pipe 25 into the interior of the connecting pipe 33, and then flows along the connecting pipe 33 into the communicating pipe 22, so that the screened mud is transported in the reverse direction. During the transport process, the communicating passage of the first delivery pipe 24 is closed to prevent the mud from continuing to move into the interior of the first delivery pipe 24.

[0082] As a further embodiment of the present invention, the lifting assembly comprises:

[0083] A first connecting ring 35 is fixedly connected to the probe tube 1 and is located above the reaming ring 4;

[0084] A second connecting ring 36 is fixedly connected to the top of the reaming ring 4. A matching ring 37 is rotatably connected to the top of the second connecting ring 36. A plurality of connecting pins 38 are fixedly connected to the top of the matching ring 37. The connecting pins 38 are all slidably inserted into the first connecting ring 35.

[0085] Multiple electric cylinders 39, each of which is fixedly mounted on the top of the first connecting ring 35, and the piston shaft of the electric cylinder 39 is fixedly connected to the top of the matching ring 37;

[0086] The piston shafts of multiple electric cylinders 39 move upward synchronously, so that the matching ring 37 drives the connecting pin 38 to move upward synchronously, and the connecting pin 38 is slidably connected to the first connecting ring 35, so that the matching ring 37 is limited in vertical movement, and the second connecting ring 36 is rotatably connected to the bottom of the matching ring 37, so that when the matching ring 37 moves upward, the second connecting ring 36 moves upward synchronously with the matching ring 37, and drives the reaming ring 4 to move, so that the reaming ring 4 moves upward along the sleeve of the probe tube 1 and the rotating tube 2.

[0087] As a further embodiment of the present invention, the rotating assembly comprises:

[0088] An outer gear ring 40 , the outer gear ring 40 is fixedly connected to a surface of the second connecting ring 36 ;

[0089] Motor 41, motor 41 is fixedly mounted on the mating ring 37, a gear 42 is fixedly connected to the output shaft of motor 41, and gear 42 is meshed with the outer gear ring 40;

[0090] The output shaft of the motor 41 drives the gear 42 to rotate synchronously, and through the meshing action of the gear 42 and the outer gear ring 40, the second connecting ring 36 rotates unidirectionally along the rotating connection of the matching ring 37, and drives the reaming ring 4 to rotate synchronously.

[0091] As a further embodiment of the present invention, the top end of the probe 1 is fixedly connected to a flange 43 (such as Figure 2 As shown), a plurality of positioning holes 44 are provided on the flange 43 along the circumferential direction;

[0092] A flange 43 is fixed to the top end of the probe tube 1 , and is bolted to the lifting end of the crane through positioning holes 44 on the flange 43 , thereby fixing the probe tube 1 and the crane.

[0093] As a further embodiment of the present invention, the bottom ends of the rotating tube 2 and the sealing ring 3 are both provided with guiding inclined surfaces, and the guiding inclined surfaces of the rotating tube 2 and the sealing ring 3 extend correspondingly;

[0094] By providing guiding slopes at the bottom ends of the rotating tube 2 and the sealing ring 3, when the rotating tube 2 enters the borehole and pumps the mud and gravel, the mud and gravel move along the guiding slopes at the bottom ends of the rotating tube 2 and the sealing ring 3 into the cavity of the sealing ring 3, thereby improving the cleaning efficiency of the mud and gravel and reducing omissions and blockages during emptying.

[0095] A bored pile auxiliary hole cleaning method comprising the following steps:

[0096] Step 1: Fix the top of the probe tube 1 on the crane, move the probe tube 1 into the borehole through the crane, and pump the mud and sand in the borehole;

[0097] Step 2: The lifting assembly drives the reaming ring 4 to move upward, and the blocking block 5 moves to the inside of the sealing ring 3 and blocks the pump suction channel at the bottom end of the rotating tube 2. The spraying groove 9 on the rotating tube 2 is exposed below the reaming ring 4;

[0098] Step 3: The crane drives the probe tube 1 to move in the opposite direction, and continues to pump the filtered mud back into the probe tube 1 and the rotating tube 2 through the action of the pumping assembly, and sprays it along the spraying trough 9 to the reaming position of the borehole, and the rotating assembly drives the reaming ring 4 to rotate.

[0099] Working principle of the present invention:

[0100] Before cleaning the borehole, the top of the probe tube 1 is fixed on the crane, and the probe tube 1 is moved into the borehole by the crane. The rotating tube 2 at the bottom of the probe tube 1 first contacts the borehole, and when the probe tube 1 drives the rotating tube 2 to move into the borehole, the pumping assembly pumps the mud and sand inside the borehole, so that the mud and sand enter the rotating tube 2 and the probe tube 1 along the cavity of the sealing ring 3 and continue to be transported;

[0101] The diameters of the rotating tube 2 and the probe tube 1 are the same as the inner diameter of the borehole, and the reaming ring 4 is sleeved on the probe tube 1 and the rotating tube 2, so that when the reaming ring 4 moves synchronously into the borehole, the reaming ring 4 squeezes and reams the inner wall of the borehole;

[0102] When the rotating tube 2 moves to the bottom of the borehole, the mud and gravel inside the borehole are cleaned, and then the reaming ring 4 is driven by the action of the lifting assembly to move vertically upward along the surface of the probe tube 1 and the rotating tube 2. During the movement, the reaming ring 4 drives multiple fixing bars 7 to move upward inside the movable groove 8, so that the circular rod 6 and the blocking block 5 move upward synchronously, and the blocking block 5 moves to the inside of the sealing ring 3 and blocks the pumping channel at the bottom end of the rotating tube 2. When the reaming ring 4 moves upward, the spraying groove 9 on the rotating tube 2 is exposed under the reaming ring 4, and then the filtered mud is pumped back into the probe tube 1 and the rotating tube 2 through the action of the pumping assembly, and sprayed along the spraying groove 9 to the reaming position of the borehole;

[0103] The crane drives the probe tube 1 to move in the opposite direction in the borehole, and the rotating assembly drives the reaming ring 4 to rotate, and through the fixation of the reaming ring 4 and the fixing bar 7 and the limitation of the fixing bar 7 inside the movable groove 8, the rotating tube 2 rotates synchronously with the reaming ring 4, so that the spraying tank 9 rotates continuously and sprays the mud to the reaming area of the borehole, and the rotation of the rotating tube 2 is in rotational contact with the sprayed mud, so that the mud remains in a uniform suspension state in the reaming area of the borehole, ensuring that the fixed particles are effectively deposited on the surface of the reaming hole wall. When the rotating tube 2 rotates, the centrifugal force generated by the rotation of the rotating tube 2 causes the solid particles in the mud to diffuse toward the reaming hole wall, thereby enhancing the contact efficiency between the particles and the reaming hole wall, reducing the flow sedimentation of the mud, and improving the formation effect of the mud skin on the hole wall.

[0104] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention as claimed, and the scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A bored pile auxiliary hole cleaning device, comprising a probe tube (1), characterized in that: Also includes: A rotating tube (2), the rotating tube (2) being rotatably connected to the bottom of the probe tube (1), the diameters of the rotating tube (2) and the probe tube (1) being the same as the inner diameter of the borehole, and a sealing ring (3) being fixedly connected to the interior of the rotating tube (2); A hole-expanding ring (4), the hole-expanding ring (4) is sleeved on the surfaces of the probe tube (1) and the rotating tube (2), a blocking block (5) is provided below the sealing ring (3), a circular rod (6) is fixedly connected to the top of the blocking block (5), the top of the circular rod (6) extends from the inside of the sealing ring (3) to the top of the sealing ring (3) and is then fixedly connected to a plurality of fixing bars (7), a plurality of movable grooves (8) are provided on the surface of the rotating tube (2), one end of the fixing bar (7) extends to the inside of the corresponding movable groove (8) and is then fixedly connected to the inner wall of the hole-expanding ring (4); A spraying groove (9), wherein the spraying groove (9) is provided on the rotating tube (2) and is located inside the reaming ring (4); A pumping assembly, the pumping assembly is used to pump the mud inside the borehole and return it after filtering; A rotating assembly, the rotating assembly being used to drive the rotation of the reaming ring (4); A lifting assembly is provided, wherein the lifting assembly is used to drive the expansion ring (4) to vertically lift and lower on the rotating tube (2).

2. The bored pile auxiliary hole cleaning device according to claim 1, characterized in that: A first receiving groove (10) is provided on the rotating tube (2). Before the lifting assembly drives the reaming ring (4) to rise, the first receiving groove (10) is located inside the reaming ring (4). An arc plate (11) is slidably connected inside the first receiving groove (10). The top of the sealing ring (3) is fixedly connected to a connecting strip (12). One side of the connecting strip (12) is fixedly connected to a limiting sleeve (13). A limiting pin (14) is fixedly connected to the arc plate (11). One end of the limiting pin (14) is slidably limited inside the limiting sleeve (13). A spring (15) is provided inside the limiting sleeve (13). The spring (15) is fixedly connected between the limiting pin (14) and the connecting strip (12). A guiding slope is provided on the top of the arc plate (11).

3. The bored pile auxiliary hole cleaning device according to claim 2, characterized in that: A second receiving groove (16) is provided below the surface of the reamer ring (4), a mounting frame (17) is slidably connected inside the second receiving groove (16), a contact roller (18) is rotatably connected inside the mounting frame (17), and a plurality of circular protrusions (19) are fixedly connected to the surface of the contact roller (18), a first guide block (20) is fixedly connected to the rotating tube (2), a second guide block (21) is fixedly connected below one side of the mounting frame (17), the first guide block (20) and the second guide block (21) are both located between the mounting frame (17) and the rotating tube (2), the first guide block (20) is located above the second guide block (21), and a guide slope is provided at one adjacent end of the first guide block (20) and the second guide block (21).

4. The bored pile auxiliary hole cleaning device according to claim 1, characterized in that: The pumping assembly comprises: A connecting pipe (22), the connecting pipe (22) is fixedly connected to the upper side of the probe tube (1), and one end of the connecting pipe (22) is fixedly connected to a circular shell (23); a first delivery pipe (24), the first delivery pipe (24) being fixedly connected to the circular shell (23), and the first delivery pipe (24) being arranged opposite to the connecting pipe (22); a second delivery pipe (25), the second delivery pipe (25) being fixedly connected to the circular shell (23), and the second delivery pipe (25) being located at the bottom of the circular shell (23); A slurry storage tank (26) is provided on one side of the probe (1), a vibrating screen (27) is fixedly installed inside the slurry storage tank (26), a first sand and gravel pump (28) and a second sand and gravel pump (29) are fixedly installed on the top of the slurry storage tank (26), a first hose (30) is fixedly connected between the feed end of the first sand and gravel pump (28) and the first delivery pipe (24), a discharge end of the first sand and gravel pump (28) is located above the vibrating screen (27), a second hose (31) is fixedly connected between the discharge end of the second sand and gravel pump (29) and the second delivery pipe (25), a feed end of the second sand and gravel pump (29) is located in the slurry storage tank (26), and a conversion assembly is connected to the circular shell (23), and the conversion assembly is used to convert the communication between the first delivery pipe (24) and the second delivery pipe (25).

5. The bored pile auxiliary hole cleaning device according to claim 4, characterized in that: The conversion component includes: A rotating block (32), the rotating block (32) is rotatably connected to the inside of the circular shell (23), a connecting pipe (33) is fixedly inserted into the rotating block (32), and both ends of the connecting pipe (33) are in contact with the inner wall arc surface of the circular shell (23); The swing cylinder (34) is fixedly mounted on the circular housing (23), and the piston shaft of the swing cylinder (34) is fixedly connected to the axis of one side of the rotating block (32).

6. The bored pile auxiliary hole cleaning device according to claim 1, characterized in that: The lifting assembly comprises: a first connecting ring (35), the first connecting ring (35) being fixedly connected to the probe tube (1), the first connecting ring (35) being located above the reaming ring (4); a second connecting ring (36), the second connecting ring (36) being fixedly connected to the top of the reaming ring (4), the top of the second connecting ring (36) being rotatably connected to a matching ring (37), the top of the matching ring (37) being fixedly connected to a plurality of connecting pins (38), the connecting pins (38) being slidably inserted on the first connecting ring (35); A plurality of electric cylinders (39) are fixedly mounted on the top of the first connecting ring (35), and the piston shafts of the electric cylinders (39) are fixedly connected to the top of the matching ring (37).

7. The bored pile auxiliary hole cleaning device according to claim 6, characterized in that: The rotating assembly comprises: an outer toothed ring (40), the outer toothed ring (40) being fixedly connected to a surface of the second connecting ring (36); A motor (41) is fixedly mounted on the matching ring (37), a gear (42) is fixedly connected to the output shaft of the motor (41), and the gear (42) is meshed with the outer gear ring (40).

8. The bored pile auxiliary hole cleaning device according to claim 1, characterized in that: A flange (43) is fixedly connected to the top end of the probe tube (1), and a plurality of positioning holes (44) are formed on the flange (43) along the circumference.

9. The bored pile auxiliary hole cleaning device according to claim 1, characterized in that: The bottom ends of the rotating tube (2) and the sealing ring (3) are both provided with guiding inclined surfaces, and the guiding inclined surfaces of the rotating tube (2) and the sealing ring (3) extend correspondingly.

10. A boring pile auxiliary hole cleaning method, applicable to the boring pile auxiliary hole cleaning device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step 1: Fix the top end of the probe tube (1) on a crane, move the probe tube (1) into the borehole via the crane, and use the pumping assembly to pump the mud and sand in the borehole; Step 2: The lifting assembly drives the reaming ring (4) to move upward, and the blocking block (5) moves to the inside of the sealing ring (3) and blocks the pump suction channel at the bottom end of the rotating tube (2). The spraying groove (9) on the rotating tube (2) is exposed below the reaming ring (4); Step 3: The crane drives the probe pipe (1) to move in the reverse direction, and continues to pump the filtered mud back into the probe pipe (1) and the rotating pipe (2) through the action of the pumping assembly, and sprays it along the spraying trough (9) to the expansion position of the drill hole, and the rotating assembly drives the expansion ring (4) to rotate.

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