CN115263191A - Drilling, expanding and cleaning integrated reverse circulation rotating extruding and expanding disk pile supporting machine and construction method - Google Patents

Abstract

The present application discloses a drilling, expanding and cleaning integrated reverse circulation rotating squeeze-expanding pile pile driver and a construction method, and relates to the technical field of the pile pile driver equipment. It includes an inner pipe and an outer pipe. A drill bit is installed at the bottom of the pipe, a mud pump is installed on the top of the inner pipe, a two-way hydraulic pump is installed on the inner pipe, a lower rotating expanding arm is hinged on the two-way hydraulic pump, an upper rotating expanding arm is hinged on the lower rotating expanding arm, and the upper rotating expanding arm is hinged. Hinged on the outer tube, the inner tube is provided with a lifting hole, a driving rod is slidably installed in the lifting hole, a through slot is opened on the outer wall of the inner tube, and a second through slot is opened on the inner wall of the inner tube. A connecting block is installed in the first through slot, and the connecting block is used to connect the drive rod and the lower piston rod. The second through slot is slidably installed with a lower dredging arm. One end of the lower dredging arm is hinged to the driving rod, and the other end is hinged with an upper dredging arm. , one end of the upper dredging arm is hinged to the inner wall of the inner tube. The present application has the effect of facilitating the dredging of the inner pipe in the pile foundation hole.

Description

Drilling, expanding and clearing integrated reverse circulation rotary extruding and expanding supporting disc pile machine and its construction method

technical field

The present application relates to the technical field of support disc pile machine equipment, in particular to a drilling, expanding and clearing integrated reverse circulation rotary extruding and expanding support disc pile machine and its construction method.

Background technique

Drilling, expanding and clearing integrated rotary extruding and expanding support plate pile machine is a special construction machine for support plate cast-in-place piles which integrates the functions of drilling, rotating and expanding the bearing plate, cleaning the plate cavity and the bottom of the hole. or vehicle-mounted) mechanism, drill rod, drill expansion body lifting mechanism, drill bit forward drilling mechanism, rotary expansion arm rotary expansion mechanism, etc.

Drilling, expansion and clearing integrated rotary extruded and expanded branch pile machine usually includes an outer pipe and a hollow inner pipe. The pipe pumps the mud at the bottom of the pile foundation to the mud pool outside the pile foundation hole.

The inner pipe is not only the carrier of the drill bit and the mud pump, but also the channel for the mud pump to pump and discharge the mud. When the mud moves upward through the inner pipe, there is a possibility that the mud will be blocked inside the inner pipe. At this time, the operator needs to remove the inner pipe. The pipe is lifted to the outside of the pile foundation hole for dredging, which reduces the construction efficiency of the pile foundation drilling and increases the construction cost.

Contents of the invention

In order to facilitate the dredging of the mud blocked in the inner pipe in the pile foundation hole, on the one hand, the application provides a drilling, expanding and clearing integrated reverse circulation rotary extrusion and expansion branch pile machine, adopting the following technical solutions:

Drilling, expanding and clearing integrated reverse circulation rotary extruded and expanded branch pile machine, including hollow inner tube and outer tube, the inner tube is slidably installed in the outer tube, the bottom of the inner tube is equipped with a drill bit, the A mud pump is installed on the top of the inner pipe, and a two-way hydraulic pump is installed on the inner pipe. A lower rotary expansion arm is hinged on the two-way hydraulic pump. Rotary expansion arm, the upper rotary expansion arm is hinged to the outer tube, the upper piston rod of the two-way hydraulic pump pushes the outer tube to make the upper rotary expansion arm and the lower rotary expansion arm spread apart, and the inner A lifting hole is vertically opened inside the tube, and a driving rod is slid vertically inside the lifting hole, a through slot 1 is opened on the outer wall of the inner tube, and a through slot 2 is opened on the inner wall of the inner tube, and the through slot 2 is opened on the inner wall of the inner tube. Groove 1 and said through groove 2 are connected to said lifting hole, said through groove 1 is equipped with a connecting block, said connecting block is used to connect said drive rod and the lower piston rod of said two-way hydraulic pump, so A lower dredging arm is slidingly installed in the second through slot, one end of the lower dredging arm is hinged to the drive rod, and the other end of the lower dredging arm is hinged to an upper dredging arm, and the upper dredging arm is far away from the lower dredging arm. One end of the arm is hinged to the inner wall of the inner tube.

Through the above technical solution, when the operator needs to expand the diameter at the current depth in the pile foundation hole, by starting the upper piston rod of the two-way hydraulic pump, the upper piston rod moves downward, and the outer pipe moves downward under the action of gravity. At this time, the up-rotating expansion arm and the down-rotating expansion arm are stretched, and the outer tube and the inner tube are rotated at this time, and the inner wall of the pile foundation hole can be cut through the up-rotating expanding arm and the down-rotating expanding arm, so as to achieve the diameter expansion. Purpose.

When the mud in the inner pipe is blocked, by starting the lower piston rod, the lower piston rod drives the drive rod to move upward through the connecting block, and the upper dredging arm and the lower dredging arm are gradually opened. On the one hand, the blocked mud is driven to move upward. On the one hand, it can reduce the adhesion of the clogged mud on the inner wall of the inner pipe, so that the mud pump can pump up the mud in the inner pipe. By repeating the reciprocating motion of the lower piston rod, a better dredging effect can be achieved. Since the device can dredge the inner pipe in the pile foundation hole, the construction efficiency of the pile foundation drilling is improved.

In a preferred example of the present application, it can be further configured as follows: the bottoms of the upper dredging arm and the lower dredging arm are pointed, and the tops of the upper dredging arm and the lower dredged arm are planar.

Through the above technical scheme, since the tops of the upper dredging arm and the lower dredging arm are planar, the planar tops of the upper dredging arm and the lower dredging arm can push the blocked mud when the upper dredging arm and the lower dredging arm are stretched Moving upwards is convenient for the mud pump to pump up the mud in the inner pipe.

In addition, since the bottom of the upper dredge arm and the lower dredge arm are pointed, when the upper dredge arm and the lower dredge arm are retracted, the bottom of the upper dredge arm and the lower dredge arm are pointed, which not only facilitates the movement of the upper dredge arm and the lower dredge arm. When the dredging arm moves downward, the mud blocked in the inner pipe can also be cut, thereby further facilitating the mud pump to pump out the mud in the inner pipe.

In a preferred example, the present application can be further configured as follows: the inner wall of the inner tube is provided with a rotating groove, and a booster block is rotatably installed in the rotating groove, and the side of the booster block away from the inner wall of the inner tube is set as Arc-shaped, the booster block and the rotating groove match each other.

Through the above technical solution, when the mud in the inner pipe is blocked, the operator can turn the lower half of the booster block to the center of the inner pipe by rotating the booster block, so that the lower half of the booster block can push the inner The mud in the pipe moves upwards, thereby further facilitating the mud pump to pump out the mud in the inner pipe.

In a preferred example, the present application can be further configured as: after the upper dredge arm and the lower dredge arm are stretched, the projected lengths of the upper dredge arm and the lower dredge arm in the horizontal direction are larger than the inner The inner diameter of the pipe and the movement track of the hinge point of the upper dredging arm and the lower dredging arm can pass through the upper half of the rotating slot.

Through the above technical scheme, when the upper dredging arm and the lower dredging arm are stretched, the hinged ends of the two can gradually move towards the rotation groove, and after the hinged end contacts the upper half of the booster block, the booster The lower half of the block rotates towards the center of the inner tube, so that the mud pushing effect of the booster block can be exerted.

In a preferred example, the present application can be further configured as follows: a limiting block is installed on the arc-shaped side wall of the booster block, a limiting slot is opened on the inner wall of the rotating groove, and the limiting block is slidably arranged on the inside the limit slot.

Through the above technical solution, the booster block reduces the possibility of overturning of the booster block under the limiting action of the limiter block.

In a preferred example, the present application can be further configured as follows: a spring is installed between the side wall of the limiting block and the inner wall of the limiting groove, and one end of the spring is fixedly connected to the limiting block, so The other end of the spring is fixedly connected to the inner wall of the limiting groove.

Through the above technical scheme, when the lower piston rod drives the upper dredging arm and the lower dredging arm to prop up, the hinged ends of the upper dredging arm and the lower dredging arm push the booster block to turn over, so that the spring is in a stretched state; In the process of driving the upper dredging arm and the lower dredging arm to be retracted, after the hinged ends of the upper dredging arm and the lower dredged arm leave the booster block, the booster block can be rotated again to in the rotating tank.

In a preferred example, the present application can be further configured as follows: a guide hole is opened on the inner wall of the limiting groove, a guide rod is slidably installed in the guide hole, and one end of the guide rod is fixedly connected to the limit block , the spring is sheathed on the guide rod.

Through the above technical solution, in the process of stretching and returning to the original length of the spring, since the spring is sleeved on the guide rod, the possibility of bending of the spring is reduced, thereby prolonging the service life of the spring.

In a preferred example, the present application may be further configured as follows: a reinforcing groove is opened on the side wall of the booster block close to the inner wall of the inner tube, and a reinforcing plate is installed in the reinforcing groove.

Through the above technical scheme, the reinforcing plate in the reinforcing groove can be made of alloy material with high hardness, and the hinged ends of the upper dredging arm and the lower dredging arm are in contact with the reinforcing plate, so as to avoid the pressure directly acting on the booster block , thereby reducing the possibility of the booster block being deformed under pressure.

On the other hand, the present application provides a construction method of drilling, expanding, and clearing integrated reverse circulation rotary extruded and expanded branch pile machine, and adopts the following technical scheme.

Drilling, expansion and clearing integrated reverse circulation rotary extrusion and expansion branch pile machine construction method, when the inner pipe is blocked by mud, it is necessary to dredge the inner pipe, including the following steps:

S1. Stop the rotation of the drill bit to stop the output of bottom sediment;

S2. Start the two-way hydraulic pump, so that the lower piston rod moves upward, and the lower piston rod drives the driving rod to move upward, so that the upper dredging arm and the lower dredging arm are deployed in the inner tube, and the Dredge the mud blocked in the inner pipe;

S3, while starting the bidirectional hydraulic pump, start the mud pump to extract the mud in the inner pipe;

S4. After the dredging of the inner tube is completed, the lower piston rod of the two-way hydraulic pump is controlled to move downward, and the lower piston rod drives the driving rod to move downward, and the upper dredging arm and the lower dredging arm are put away, Reduce the interference of the upper dredging arm and the lower dredging arm to the operation of the mud pump;

S4. Recover the rotation of the drill bit, and resume the pile foundation drilling operation.

Through the above technical scheme, when the mud in the inner pipe is blocked, the lower piston rod drives the drive rod to move upward through the connecting block, and the upper dredging arm and the lower dredging arm are gradually opened, which can not only drive the blocked mud to move upward, but also reduce the blockage The adhesion of the mud on the inner wall of the inner pipe makes it easier for the mud pump to pump the mud in the inner pipe upwards.

In summary, the application includes the following beneficial technical effects:

1. When the mud in the inner pipe is blocked, the operator can control the upper dredging arm and the lower dredging arm to gradually open, which can not only drive the blocked mud to move upward, but also reduce the adhesion of the blocked mud to the inner wall of the inner pipe. This makes it easier for the mud pump to pump up the mud in the inner pipe;

2. Since the bottom of the upper dredge arm and the lower dredge arm are pointed, when the upper dredge arm and the lower dredge arm are retracted, the dredge arm and the lower dredge arm can cut the mud blocked in the inner pipe, thereby further facilitating the mud The pump pumps out the mud in the inner pipe;

3. When the upper dredging arm and the lower dredging arm are stretched, the hinged ends of the two can push the booster block to rotate, so that the lower half of the booster block rotates toward the center of the inner tube, so that the booster block can be played The effect of pushing mud.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the embodiment of the present application, mainly showing the structure of the outer tube, the inner tube, the bidirectional hydraulic pump, the upper rotary expansion arm and the lower rotary expansion arm.

Fig. 2 is a schematic cross-sectional view along the A-A direction in Fig. 1, mainly illustrating the structure of the lifting hole and the driving rod.

FIG. 3 is an enlarged schematic view of part B in FIG. 2 , mainly illustrating the structures of the connection block, the first slot and the second slot.

Fig. 4 is a partial structural schematic diagram of the embodiment of the present application, mainly illustrating the structure of the upper dredging arm and the lower dredging arm.

Fig. 5 is a structural schematic view from another perspective of Fig. 4, mainly illustrating the top and bottom structures of the upper and lower dredging arms.

FIG. 6 is an enlarged schematic view of part C in FIG. 2 , mainly illustrating the structures of the booster block, the limit block, the spring and the reinforcement plate.

Explanation of reference signs:

1, inner tube; 101, drill bit; 11, lifting hole; 111, driving rod; 12, through slot one; 121, connection block; 13, through slot two; 14, rotation slot; 15, limit slot; 16, guide Hole; 2, outer tube; 3, two-way hydraulic pump; 31, upper piston rod; 32, lower piston rod; 41, lower rotary expansion arm; 42, upper rotary expansion arm; 51, lower dredging arm; 52, upper dredging arm ; 6, booster block; 61, limit block; 62, spring; 63, guide rod; 64, reinforcement groove; 65, reinforcement plate; 66, bolt.

Detailed ways

The present application will be described in further detail below in conjunction with accompanying drawings 1-6.

The embodiment of the present application discloses a drilling, expanding and clearing integrated reverse circulation rotating extruded and expanded branch pile machine. Referring to Fig. 1, the drilling, expanding and clearing integrated reverse circulation rotary extruded and expanded branch pile machine includes a hollow inner tube 1 and an outer tube 2, the inner tube 1 is vertically slid and installed in the outer tube 2, and the inner tube The outer wall of 1 and the inner wall of the outer pipe 2 are attached to each other, a mud pump (not shown in the drawings) is installed on the top of the inner pipe 1, and a drill bit 101 is installed at the bottom of the inner pipe 1, and there is a gap between the drill bit 101 and the bottom of the inner pipe 1 The gap is convenient for the mud pump to pump and discharge the mud.

Referring to Fig. 1, a two-way hydraulic pump 3 is installed on the inner tube 1, and the two-way hydraulic pump 3 is located directly below the outer tube 2. Two down-rotating expansion arms 41 are hinged on the two-way hydraulic pump 3. 41 are symmetrical to each other, and the end of each lower rotary expansion arm 41 away from the two-way hydraulic pump 3 is hinged with an upper rotary expansion arm 42, and the end of each upper rotary expansion arm 42 away from the lower rotary expansion arm 41 is hinged to the outer tube 2, bidirectional The upper piston rod 31 of the hydraulic pump 3 makes the upper rotary expansion arm 42 and the lower rotary expansion arm 41 stretch by pushing the outer tube 2, and the upper rotary expansion arm 42 and the lower rotary expansion arm 41 of the rotation can cut the inner wall of the pile foundation, so as to This enlarges the aperture.

Referring to Figures 2 and 3, the inner tube 1 is vertically provided with a lifting hole 11, and a driving rod 111 is vertically slidably mounted in the lifting hole 11, and the outer wall of the inner tube 1 is provided with a through groove 12, and the inner tube 1 The inner wall of 1 is provided with a second slot 13, the first slot 12 and the second slot 13 are connected to the lifting hole 11, and a connecting block 121 is installed vertically slidingly in the first slot 12, and the connecting block 121 is used to connect the driving rod 111 With the lower piston rod 32 of the two-way hydraulic pump 3, the lower dredging arm 51 is slidably installed in the slot two 13, and one end of the lower dredging arm 51 is hinged to the driving rod 111, and the other end of the lower dredging arm 51 is hinged with the upper dredging arm 52, One end of the upper dredging arm 52 away from the lower dredging arm 51 is hinged to the inner wall of the inner tube 1 . The upper dredging arm 52 and the lower dredging arm 51 are a group of dredging arms. There are several groups of dredging arms arranged in the inner pipe 1, and several groups of dredged arms are evenly arranged inside the inner pipe 1 vertically.

When the mud in the inner pipe 1 is blocked, the operator starts the two-way hydraulic pump 3, so that the lower piston rod 32 drives the drive rod 111 to move upward through the connecting block 121, and the upper dredging arm 52 and the lower dredging arm 51 are gradually opened, not only It can drive the blocked mud to move upwards, and can also reduce the adhesion of the blocked mud on the inner wall of the inner pipe 1, so that the mud pump can pump and discharge the mud in the inner pipe 1 upwards. Since the equipment can dredge the inner pipe in the pile foundation hole, the construction efficiency of pile foundation drilling is improved

With reference to Fig. 2, Fig. 4 and shown in Fig. 5, upper dredging arm 52 and lower dredging arm 51 bottoms are pointed, and in the process that upper dredging arm 52 and lower dredging arm 51 are packed up, upper dredging arm 52 and lower dredged arm The pointed bottom of the arm 51 not only facilitates the downward movement of the upper dredging arm 52 and the lower dredging arm 51, but also cuts the blocked mud in the inner pipe 1, so that the mud pump is convenient for pumping the mud in the inner pipe 1.

The tops of the upper dredging arm 52 and the lower dredging arm 51 are planar, and when the upper dredging arm 52 and the lower dredging arm 51 are stretched, the planar tops of the upper dredging arm 52 and the lower dredging arm 51 can push the blocked mud Move upwards, thereby further facilitating the mud pump to pump up the mud in the inner pipe 1.

Referring to Fig. 2 and Fig. 6, the inner wall of the inner tube 1 is provided with two arc-shaped rotating grooves 14, and the two rotating grooves 14 and the two groups of dredging arms are arranged in one-to-one correspondence, because the structures of the two rotating grooves 14 are consistent , and the structures in the two rotating grooves 14 are also consistent, and only one of the rotating grooves 14 and the structure in the rotating groove 14 will be described below.

In the rotating groove 14, a booster block 6 is installed for rotation, and the vertical section of the booster block 6 is semicircular. 14 matches each other. After the upper dredging arm 52 and the lower dredging arm 51 are stretched, the projected lengths of the upper dredging arm 52 and the lower dredging arm 51 in the horizontal direction are greater than the inner diameter of the inner tube 1, and the movement of the hinge point of the upper dredging arm 52 and the lower dredging arm 51 The trajectory can pass through the upper half of the rotating groove 14, and the highest point of the movement trajectory of the hinge point of the upper dredging arm 52 and the lower dredging arm 51 is lower than the highest point of the rotating groove 14.

In the process that the upper dredging arm 52 and the lower dredging arm 51 are stretched, the hinged ends of the two can gradually move towards the rotating groove 14, and after the hinged end contacts the upper half of the booster block 6, the The lower half rotates toward the center of the inner pipe 1, so that the lower half of the booster block 6 can push the mud in the inner pipe 1 to move upwards, thereby further facilitating the mud pump to pump out the mud in the inner pipe 1.

With reference to Fig. 2 and shown in Fig. 6, limit block 61 is installed on the arc-shaped side wall of booster block 6, limit groove 15 is opened in the inner wall of rotating groove 14, limit block 61 and limit groove 15 are along vertical The sections are fan-shaped, and the limiting block 61 is slidably installed in the limiting groove 15 . The boosting block 6 is limited by the limiting block 61 to reduce the possibility of overturning of the boosting block 6 .

2 and 6, an arc-shaped spring 62 is installed between the side wall of the limiting block 61 and the inner wall of the limiting groove 15, and one end of the spring 62 is fixedly connected to the limiting block 61, and the other end of the spring 62 One end is fixedly connected to the inner wall of the limiting groove 15 . The inner wall of the limit groove 15 is provided with an arc-shaped guide hole 16, and an arc-shaped guide rod 63 is slidably installed in the guide hole 16. One end of the guide rod 63 is fixedly connected to the limit block 61, and the spring 62 is sleeved on the guide. On the rod 63, the curvatures of the guide rod 63, the guide hole 16, and the spring 62 are all equal.

In the process that the lower piston rod 32 drives the upper dredging arm 52 and the lower dredging arm 51 to prop up, the hinged ends of the upper dredging arm 52 and the lower dredging arm 51 push the booster block 6 to turn over, so that the spring 62 is in a stretched state; In the process that the piston rod 32 drives the upper dredging arm 52 and the lower dredging arm 51 to pack up, after the hinged ends of the upper dredging arm 52 and the lower dredging arm 51 leave the booster block 6, the booster block 6 will move under the elastic force of the spring 62 Down, the booster block 6 can be rotated into the rotation groove 14 again. In addition, since the spring 62 is sheathed on the guide rod 63 , the possibility of the spring 62 being bent is reduced, thereby prolonging the service life of the spring 62 .

2 and 6, the side wall of the booster block 6 close to the inner wall of the inner tube 1 is provided with a reinforcement groove 64, and a reinforcement plate 65 is detachably installed in the reinforcement groove 64 through a bolt 66, and the reinforcement plate 65 adopts a higher hardness Made of alloy material, the hinged ends of the upper dredging arm 52 and the lower dredging arm 51 are in contact with the reinforcing plate 65, so as to prevent the pressure from directly acting on the booster block 6, thereby reducing the possibility of the booster block 6 being deformed under pressure sex.

The embodiment of the present application discloses the construction method of drilling, expanding and clearing integrated reverse circulation rotary extruding and expanding support disc pile machine. When the inner pipe 1 is blocked by mud, it is necessary to dredge the inner pipe 1, which includes the following steps:

S1. Stop the rotation of the drill bit 101 to stop the output of the bottom sediment;

S2. Start the two-way hydraulic pump 3, so that the lower piston rod 32 moves upward, and the lower piston rod 32 drives the driving rod 111 to move upward, so that the upper dredging arm 52 and the lower dredging arm 51 are deployed in the inner tube 1, and the inner tube 1 is blocked to dredge the mud;

S3, while starting the two-way hydraulic pump 3, start the mud pump to extract the mud in the inner pipe 1;

S4. After the dredging of the inner pipe 1 is completed, the lower piston rod 32 of the two-way hydraulic pump 3 is controlled to move downward, the lower piston rod 32 drives the driving rod 111 to move downward, and the upper dredge arm 52 and the lower dredge arm 51 are retracted to lower the upper dredge arm. The interference of the arm 52 and the lower dredge arm 51 on the operation of the mud pump;

S4, resume the rotation of the drill bit 101, resume the pile foundation drilling operation.

The embodiments of this specific implementation mode are all preferred embodiments of the present application, and do not limit the protection scope of the present application in turn, so: all equivalent changes made according to the structure, shape and principle of the present application should be covered by this application. within the scope of the application.

Claims (9)

1. Drilling, expanding and clearing integrated reverse circulation rotary extruded and expanded branch pile machine, including hollow inner tube (1) and outer tube (2), the inner tube (1) is slidably installed on the outer tube (2) ), the bottom of the inner pipe (1) is equipped with a drill bit (101), and the top of the inner pipe (1) is equipped with a mud pump. It is characterized in that: a two-way hydraulic pump is installed on the inner pipe (1) (3), said two-way hydraulic pump (3) is hinged with a lower rotary expansion arm (41), and one end of said lower rotary expansion arm (41) away from said two-way hydraulic pump (3) is hinged with an upper rotary expansion arm ( 42), the upper rotary expansion arm (42) is hinged to the outer tube (2), and the upper piston rod (31) of the two-way hydraulic pump (3) makes the upper rotary expansion The arm (42) is stretched apart from the lower rotary expansion arm (41), and a lifting hole (11) is provided in the inner tube (1) vertically, and a vertical sliding hole (11) is installed in the lifting hole (11). Drive rod (111), the outer wall of the inner tube (1) is provided with a through groove one (12), the inner wall of the inner tube (1) is provided with a through groove two (13), and the through groove one (12) and the second channel (13) are connected to the lifting hole (11), and a connecting block (121) is installed in the first channel (12), and the connecting block (121) is used to connect the drive Rod (111) and the lower piston rod (32) of the two-way hydraulic pump (3), the lower dredging arm (51) is slidably installed in the second through groove (13), and one end of the lower dredging arm (51) Hinged to the drive rod (111), the other end of the lower dredging arm (51) is hinged with an upper dredging arm (52), and the upper dredging arm (52) is hinged away from one end of the lower dredging arm (51) on the inner wall of the inner tube (1). 2. Drilling, expanding and clearing integrated type reverse circulation rotary extruding and expanding branch pile machine according to claim 1, characterized in that: the bottoms of the upper dredging arm (52) and the lower dredging arm (51) are in the shape of pointed, the tops of the upper dredging arm (52) and the lower dredging arm (51) are planar. 3. The drilling, expanding and clearing integrated reverse circulation rotary extruded and expanded branch pile machine according to claim 2, characterized in that: the inner wall of the inner pipe (1) is provided with a rotating groove (14), and the rotating A booster block (6) is installed in the groove (14), and the side of the booster block (6) away from the inner wall of the inner tube (1) is arranged in an arc shape, and the booster block (6) and the The rotating grooves (14) match each other. 4. The drilling, expanding and clearing integrated reverse circulation rotary extruded and expanded branch pile machine according to claim 3, characterized in that: after the upper dredging arm (52) and the lower dredging arm (51) are stretched, , the projected lengths of the upper dredging arm (52) and the lower dredging arm (51) in the horizontal direction are greater than the inner diameter of the inner pipe (1), and the upper dredging arm (52) and the lower dredged arm The movement trajectory of the hinge point of (51) can pass through the upper half of the rotating groove (14). 5. The drilling, expanding and clearing integrated reverse circulation rotary extruded and expanded branch pile machine according to claim 4, characterized in that: the arc-shaped side wall of the booster block (6) is equipped with a limit block ( 61), the inner wall of the rotating groove (14) is provided with a limiting groove (15), and the limiting block (61) is slidably arranged in the limiting groove (15). 6. The drilling, expanding and clearing integrated reverse circulation rotary extruding and expanding branch pile machine according to claim 5, characterized in that: the side wall of the limiting block (61) and the limiting groove (15) A spring (62) is installed between the inner walls, one end of the spring (62) is fixedly connected to the stop block (61), and the other end of the spring (62) is fixedly connected to the stop slot (15 ) of the inner wall. 7. The drilling, expanding and clearing integrated reverse circulation rotary extruded and expanded branch pile machine according to claim 6, characterized in that: the inner wall of the limit groove (15) is provided with a guide hole (16), the A guide rod (63) is slidably installed in the guide hole (16), and one end of the guide rod (63) is fixedly connected to the stop block (61), and the spring (62) is sleeved on the guide rod ( 63) on. 8. The drilling, expanding and clearing integrated reverse circulation rotary extruded and expanded branch pile machine according to claim 7, characterized in that: the side wall of the booster block (6) close to the inner wall of the inner pipe (1) is opened There is a reinforcement groove (64), and a reinforcement plate (65) is installed in the reinforcement groove (64). 9. The construction method of drilling, expanding and clearing integrated reverse circulation rotary extruded and expanded branch pile machine, based on the drilling, expanding and cleared integrated reverse circulation rotary extruded and expanded branch pile machine described in any one of claims 1-8 , is characterized in that: when the mud blockage occurs in the inner pipe (1), it is necessary to dredge the inner pipe (1), including the following steps; S1, stopping the rotation of the drill bit (101) to stop the output of bottom sediment; S2. Start the two-way hydraulic pump (3), so that the lower piston rod (32) moves upward, and the lower piston rod (32) drives the drive rod (111) to move upward, so that the upper dredging arm ( 52) deploying the lower dredging arm (51) in the inner tube (1) to dredge the mud blocked in the inner tube (1); S3. When starting the two-way hydraulic pump (3), start the mud pump to extract the mud in the inner pipe (1); S4. After the inner pipe (1) is cleared, control the lower piston rod (32) of the two-way hydraulic pump (3) to move downward, and the lower piston rod (32) drives the drive rod (111) to move downward , retracting the upper dredging arm (52) and the lower dredging arm (51), reducing the interference of the upper dredging arm (52) and the lower dredging arm (51) to the operation of the mud pump; S4. Recover the rotation of the drill bit (101), and resume the pile foundation drilling operation.

Images