A pile cutter

Abstract

The present invention provides a pile cutter, comprising a machine base, a slewing mechanism and a pile cutting mechanism; a fixing device is provided on the outer wall surface of the machine base, the fixing device is used to fix the machine base, and the slewing mechanism is arranged in the machine base; the pile cutting mechanism is located below the slewing mechanism and is connected with the slewing mechanism; by arranging the fixing device for fixing the machine base, the machine base will not move during pile cutting; pile cutting is more stable; by arranging the slewing structure to drive the pile cutting mechanism to rotate, the pile cutting mechanism can cut piles from different positions on the same horizontal line of the steel piles; it is convenient to use and has a good pile cutting effect; by arranging the pile cutting extending device, the position of the pile cutting member can be moved; when pile cutting is required, the pile cutting member is extended out of the pile cutting support; after the pile cutting is completed, the pile cutting member is retracted into the pile cutting support; the space occupied is small; by arranging the pile cutting connecting device, the pile cutting extending device drives the pile cutting member to move along the moving direction of the pile cutting connecting device at the same time; the moving direction of the pile cutting member has directionality; and the movement is more stable.

Description

Technical Field

[0001] The invention relates to the field of pile foundation cutting, and in particular to a pile cutting machine. Background Art

[0002] With the development of urbanization and industrialization in my country, the demand for domestic and industrial water is growing. Different types of water diversion projects are being planned, expanded and newly built across the country. In order to ensure water quality, reduce water treatment costs and reduce future operating costs, water intakes are being expanded to the middle of rivers, lakes or lakes. Most of the expanded water intakes are located in deep water, fast currents and wide water areas. During the construction of water intakes, there is a process of driving steel piles and cutting steel pipe piles underwater. The existing steel pipe pile cutting construction is not in place and requires multiple manual underwater operations, which makes the cutting efficiency low, and it is not easy to judge whether the cutting is completed and the process is complicated.

[0003] An underwater pile cutting device is disclosed in a patent document with application number 201921149039.4 in China and publication date 2020.5.5; the underwater pile cutting device includes an operating platform arranged on the water surface; a horizontal bracket and a vertical bracket are arranged perpendicular to each other on the operating platform; the vertical bracket is a lifting bracket, and a driving wheel is provided on the vertical bracket, and the driving wheel is connected to a driving motor for driving it; a guide wheel group is provided on the horizontal bracket, and a support plate is connected to the bottom side of the horizontal bracket, and a driven wheel group including a first driven wheel and a second driven wheel is provided on the support plate.

[0004] However, the diamond wire saw of the pile cutting device is arranged on the outer wall of the pile foundation to be cut, and the diamond wire saw is driven by the driving mechanism to cut the pile foundation to be cut; the diamond wire saw can only cut the pile foundation to be cut in one direction; when cutting in this way, a large friction force will be generated between the diamond wire saw and the pile foundation to be cut, which will lead to low cutting efficiency and short service life of the diamond wire saw; at the same time, the diamond wire saw has a flexible structure, and when cutting the pile foundation to be cut, the cutting direction of the diamond wire saw is prone to change up and down; it cannot accurately cut a plane, and the cutting effect is poor; thus, the pile cutting device is not suitable for use in operating scenarios where precision requirements are placed on the cutting surface; at the same time, when cutting When the pile is cut, the diamond wire saw is forced to approach the operating platform, so that the diamond wire saw rubs against the pile to be cut, and then the diamond wire saw cuts the pile to be cut; the pile cutting device can only give the diamond wire saw a unidirectional force. When the diamond wire saw is cutting, the diamond wire saw cannot be separated from the pile to be cut. Only when the diamond wire saw completes the cutting of the pile to be cut, the diamond wire saw can be separated from the pile to be cut. Once the wrong cutting point is selected, the wrong cutting point cannot be reselected in time, and the only way is to complete the cutting once and then select the correct cutting point for cutting; the control effect is poor. Summary of the invention

[0005] The invention provides a pile cutter with good pile cutting effect.

[0006] To achieve the above object, the technical solution of the present invention is: a pile cutter, comprising a machine base, a slewing mechanism and a pile cutting mechanism; a fixing device is provided on the outer wall of the machine base, the fixing device is used to fix the machine base, and the slewing mechanism is arranged inside the machine base; the pile cutting mechanism is located below the slewing mechanism and connected to the slewing mechanism;

[0007] The slewing mechanism includes a slewing device and a transmission device; the transmission device is installed on the inner wall of the machine base, and the slewing device passes through the transmission device and is arranged in the machine base; the slewing device cooperates with the transmission device;

[0008] The pile cutting mechanism device comprises a pile cutting driving device, a pile cutting extending device, a pile cutting support, a pile cutting connecting device and a pile cutting piece; the pile cutting support is connected to a slewing device, and the slewing device drives the pile cutting support to rotate; the pile cutting driving device, the pile cutting extending device, the pile cutting connecting device and the pile cutting piece are all arranged in the pile cutting support; one end of the pile cutting connecting device and one end of the pile cutting extending device are respectively connected to the inner wall of the pile cutting support, and one end of the pile cutting connecting device rotates on the cross section of the pile cutting support around the connection point between the pile cutting connecting device and the inner wall of the pile cutting support, and the pile cutting piece is installed on the other end of the pile cutting connecting device, the pile cutting driving device is connected to the pile cutting piece, and the other end of the pile cutting extending device is connected to the pile cutting connecting device;

[0009] The pile cutting support is provided with a pile cutting opening; the pile cutting extending device drives the pile cutting piece to extend and retract the pile cutting support through the pile cutting opening along the movable direction of the pile cutting connecting device.

[0010] The above arrangement, by arranging a fixing device for fixing the machine base; in this way, the machine base will not move when cutting piles; the pile cutting is more stable; the pile cutting mechanism is driven to rotate by arranging a rotary structure, so that the pile cutting mechanism can cut piles from different positions on the same horizontal line of the steel pile; this is convenient to use and has a good pile cutting effect; the position of the pile cutting member is moved by arranging a pile cutting extension device; when pile cutting is required, the pile cutting member is extended from the pile cutting support; after the pile cutting is completed, the pile cutting member is retracted into the pile cutting support; this occupies less space; at the same time, the pile cutting support protects the pile cutting member; it prevents the pile cutting member from being hit and damaged when not working; by arranging a pile cutting connection device, the pile cutting extension device drives the pile cutting member to move along the activity direction of the pile cutting connection device; in this way, the movement direction of the pile cutting member is directional; and the movement is more stable.

[0011] Furthermore, the transmission device includes a transmission fixing member and a transmission member; the transmission member is installed on the transmission fixing member; and the transmission member is an internal gear ring.

[0012] In the above arrangement, the transmission member is fixed by arranging the transmission fixing member; and by arranging the transmission member, the rotary device rotates under the action of the transmission member.

[0013] Furthermore, the rotary device includes a rotating shaft, a rotary connecting member and a rotary driving device; the rotary connecting member is connected to the rotating shaft; the rotary driving device is fixed on the rotary connecting member; the rotary driving device is provided with a driving member, which is an external gear that cooperates with the transmission member.

[0014] The above arrangement is achieved by setting up a rotary drive device, which is installed on a rotary connecting member, and the rotary connecting member is installed on a rotating shaft; under the action of the rotary drive device, the driving member cooperates with the transmission member; the rotary drive device realizes its own rotation around the transmission member through self-rotation; thus, the rotary device realizes the rotation around the transmission member.

[0015] Furthermore, the pile cutting connection device includes an articulated movable part, a connecting part and a fixed part; the articulated movable part is hinged on the inner wall of the pile cutting support, the connecting part is connected to the articulated movable part, and the fixed part is connected to the connecting part; the pile cutting part is installed at the lower end of the fixed part, and the pile cutting drive device is installed at the upper end of the fixed part; the pile cutting drive device drives the pile cutting part to rotate.

[0016] The above arrangement is achieved by arranging an articulated movable part to be hinged to the inner wall of the pile cutting support; in this way, the movable direction of the articulated movable part is specified after articulation; it is connected to the articulated movable part through a connecting part; in this way, the connecting part will move along the movable direction of the articulated movable part; at the same time, a pile cutting part is installed on the fixed part and connected to the connecting part, so that the pile cutting part will also move along the movable direction of the articulated movable part; and a pile cutting driving device is provided to drive the pile cutting part to rotate and then cut the pile.

[0017] Furthermore, the pile cutting and extending device is connected to the connecting piece.

[0018] In the above arrangement, the pile cutting extending device is connected to the connecting member, and the pile cutting extending device drives the connecting member to move along the moving direction of the hinged movable member.

[0019] Furthermore, the fixing device includes a fixing support leg and an adjusting device; the fixing support leg and the adjusting device are each provided with at least one; the fixing support leg and the adjusting device are evenly distributed at the same horizontal height on the outer wall of the base.

[0020] The above arrangement enables the pile cutter to be fixed in the steel pile through the fixing device by arranging the fixing legs; and enables the pile cutter to be fixed in steel piles of different sizes by arranging the adjusting device.

[0021] Furthermore, the adjusting device includes an adjusting support foot and an adjusting drive device; the adjusting drive device is installed on the adjusting support foot.

[0022] The above arrangement enables the pile cutter to be fixed in steel piles of different sizes by adjusting the driving device away from and close to the outer wall of the machine base; when the driving device is adjusted away from the outer wall of the machine base, the distance between the driving device and the outer wall of the machine base is increased; at this time, the pile cutter can be installed in a steel pile with a larger inner diameter; when the driving device is adjusted close to the outer wall of the machine base, the distance between the driving device and the outer wall of the machine base is reduced; at this time, the pile cutter can be installed in a steel pile with a smaller inner diameter.

[0023] Furthermore, a sealing door communicating with the interior is provided on the outer wall of the base.

[0024] The above arrangement allows the rotary device installed in the machine base to be inspected and repaired by arranging a sealing door; at the same time, the sealing door is arranged in a sealed manner, so as to prevent water from entering the machine base under the action of pressure, thereby causing damage to the rotary device.

[0025] Furthermore, the pile cutter also includes a pile cutting detection device and a rotation detection device.

[0026] The above arrangement detects whether the pile cutting member has cut through the steel pile by setting a pile cutting detection device; detects the rotation angle of the rotary mechanism by setting a rotation detection device; thus, the pile cutter can be controlled according to the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention.

[0028] Figure 2 It is a structural schematic diagram of the pile cutting mechanism in the present invention.

[0029] Figure 3 for Figure 1 Enlarged view of a.

[0030] Figure 4 It is a schematic diagram of the distribution of the fixing device in the present invention.

[0031] Figure 5 This is a diagram showing the use status of the pile cutting member in the present invention when the pile cutting support is retracted.

[0032] Figure 6 This is a diagram showing the use state of the pile cutting member extending out of the pile cutting support in the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1-6As shown; a pile cutter comprises a machine base 1, a slewing mechanism 2, a pile cutting mechanism 3, a pile cutting detection device (not shown in the figure) and a slewing detection device (not shown in the figure); in this embodiment, the pile cutting detection device is a pressure detector. The pile cutting detection device is provided to detect whether the pile cutting member 35 cuts through the steel pile 5; the rotation angle of the slewing mechanism 2 is detected by providing a slewing detection device; in this way, the pile cutter can be controlled according to the detection result. A fixing device 4 is provided on the outer wall surface of the machine base 1, and the fixing device 4 is used to fix the machine base 1. The slewing mechanism 2 is provided in the machine base 1; the pile cutting mechanism 3 is located below the slewing mechanism 2 and is connected to the slewing mechanism 2.

[0035] There are more than one set of fixing devices 4; in this embodiment, there are two sets of fixing devices 4; one set is arranged at the upper end of the outer wall surface of the base 1; and the other set is arranged at the lower end of the outer wall surface of the base 1; this has a good fixing effect.

[0036] A set of fixing devices 4 includes fixing legs 41 and adjusting devices 42; each of the fixing legs 41 and adjusting devices 42 is provided with at least one; in this embodiment, two fixing legs 41 are provided, and one adjusting device 42 is provided. The fixing legs 41 and the adjusting devices 42 are evenly distributed at the same level on the outer wall of the base 1. By providing the fixing legs 41, the pile cutter can be fixed in the steel pile 5 through the fixing devices 4; by providing the adjusting devices 42, the pile cutter can be fixed in the steel piles 5 of different sizes.

[0037] The adjusting device 42 includes an adjusting support leg 421 and an adjusting driving device 422; in this embodiment, the adjusting driving device 422 is a hydraulic cylinder. The adjusting driving device 422 is installed on the adjusting support leg 421, and the adjusting driving device 422 is away from and close to the outer wall of the base 1. By adjusting the driving device 422 away from and close to the outer wall of the base 1, the pile cutter can be fixed in the steel piles 5 of different sizes; when the adjusting driving device 422 is away from the outer wall of the base 1, the distance between the adjusting driving device 422 and the outer wall of the base 1 increases; at this time, the pile cutter can be installed in the steel pile 5 with a larger inner diameter; when the adjusting driving device 422 is close to the outer wall of the base 1, the distance between the adjusting driving device 422 and the outer wall of the base 1 decreases; at this time, the pile cutter can be installed in the steel pile 5 with a smaller inner diameter.

[0038] The outer wall of the base 1 is provided with a sealing door 11 communicating with the interior. The sealing door 11 is provided so that the rotary device 21 installed in the base 1 can be inspected and repaired; at the same time, the sealing door 11 is provided in a sealed manner, so as to prevent water from entering the base 1 under pressure, thereby causing damage to the rotary device 21.

[0039] The rotary mechanism 2 includes a rotary device 21 and a transmission device 22; the transmission device 22 is installed on the inner wall of the base 1, and the rotary device 21 passes through the transmission device 22 and is arranged in the base 1; the rotary device 21 rotates around the transmission device 22; the rotary device 21 includes a rotating shaft 211, a rotary connecting member 212 and a rotary driving device 213; in this embodiment, the rotary driving device 213 is a hydraulic motor. The rotary connecting member 212 is connected to the rotating shaft 211; the rotary driving device 213 is fixed on the rotary connecting member 212; the rotary driving device 213 is provided with a driving member 214. The transmission device 22 includes a transmission connection fixing member 221 and a transmission member 222; the transmission member 222 is installed on the transmission connection fixing member 221; the transmission member 222 is an inner gear ring. The driving member 214 is an outer gear matched with the transmission member 222. The driving member 214 is meshed with the transmission member 222. When the driving member 214 rotates, the transmission member 222 should rotate. However, because the outer wall of the base 1 is connected to the fixing device 4, the fixing device 4 is fixed inside the steel pile. In this way, the base 1 is fixed, and the transmission member 222 is also fixed. When the driving member 214 rotates, the transmission member 222 cannot rotate, which will drive the rotary driving device 213 to rotate around the transmission member 222; at the same time, the rotary driving device 213 is connected to the rotating shaft 211 through the rotary connecting member 212. In this way, when the rotary driving device 213 rotates, it will drive the rotating shaft 211 to rotate, thereby realizing the rotation of the rotary device 21 around the transmission device 22.

[0040] By providing a rotary drive device 213, the rotary drive device 213 is installed on the rotary connection member 212, and the rotary connection member 212 is installed on the rotating shaft 211; under the action of the rotary drive device 213, the driving member 214 cooperates with the transmission member 222; the rotary drive device 213 realizes its own rotation around the transmission member 222 by self-rotation; and drives the rotating shaft 211 to rotate at the same time; thus, the rotary device 21 is realized to rotate around the transmission member 222. The transmission member 222 is fixed by providing a transmission connection fixing member 221; and the transmission member 222 is provided, so that the rotary device 21 rotates under the action of the transmission member 222.

[0041] The pile cutting mechanism 3 comprises a pile cutting driving device 32, a pile cutting extending device 33, a pile cutting support 31, a pile cutting connecting device 34 and a pile cutting member 35; in this embodiment, the pile cutting member 35 is a saw blade, the pile cutting driving device 32 is a hydraulic motor, and the pile cutting extending device 33 is a hydraulic cylinder. The pile cutting support 31 is connected to the rotating shaft 211, and the rotating shaft 211 drives the pile cutting support 31 to rotate; the pile cutting driving device 32, the pile cutting extending device 33, the pile cutting connecting device 34 and the pile cutting member 35 are all arranged in the pile cutting support 31; one end of the pile cutting connecting device 34 and one end of the pile cutting extending device 33 are respectively connected to the inner wall of the pile cutting support 31, and one end of the pile cutting connecting device 34 rotates on the cross section of the pile cutting support 31 around the connection between the pile cutting connecting device 34 and the inner wall of the pile cutting support 31, and the pile cutting member 35 is installed on the other end of the pile cutting connecting device 34, the pile cutting driving device 32 is connected to the pile cutting member 35, and the other end of the pile cutting extending device 33 is connected to the pile cutting connecting device 34; the pile cutting support 31 is provided with a pile cutting opening 311; the pile cutting extending device 33 drives the pile cutting member 35 to extend and retract the pile cutting support 31 through the pile cutting opening 311 along the movable direction of the pile cutting connecting device 34.

[0042] The pile cutting connection device 34 includes an articulated movable part 341, a connecting part 342 and a connecting fixed part 343; the articulated movable part 341 is articulated on the inner wall of the pile cutting support 31, the connecting part 342 is connected to the articulated movable part 341, and the connecting fixed part 343 is connected to the connecting part 342; the pile cutting member 35 is installed at the lower end of the connecting fixed part 343, and the pile cutting driving device 32 is installed at the upper end of the connecting fixed part 343; the pile cutting driving device 32 drives the pile cutting member 35 to rotate. The articulated movable part 341 is hinged to the inner wall of the pile cutting support 31; the movable direction of the articulated movable part 341 is specified after articulation; the connecting part 342 is connected to the articulated movable part 341; the connecting part 342 moves along the movable direction of the articulated movable part 341; at the same time, the connecting fixed part 343 is equipped with a pile cutting part 35 and connected to the connecting part 342, so that the pile cutting part 35 also moves along the movable direction of the articulated movable part 341; the pile cutting driving device 32 is provided to drive the pile cutting part 35 to rotate and then cut the pile. The pile cutting extension device 33 is connected to the connecting part 342. The pile cutting extension device 33 is connected to the connecting part 342, and the pile cutting extension device 33 drives the connecting part 342 to move along the movable direction of the articulated movable part 341.

[0043] By setting a fixing device 4 for fixing the machine base 1, the machine base 1 will not move when cutting piles, and the pile cutting is more stable. By setting a rotary structure to drive the pile cutting mechanism 3 to rotate, the pile cutting mechanism 3 can cut piles from different positions on the same horizontal line of the steel pile 5. This is convenient to use and has a good pile cutting effect. The position of the pile cutting member 35 is moved by setting a pile cutting extension device 33. When pile cutting is required, the pile cutting member 35 is extended from the pile cutting support 31. After the pile cutting is completed, the pile cutting member 35 is retracted into the pile cutting support 31. This occupies less space. At the same time, the pile cutting support 31 protects the pile cutting member 35, preventing the pile cutting member 35 from being hit and damaged when not working. By setting a pile cutting connection device 34, the pile cutting extension device 33 drives the pile cutting member 35 to move along the active direction of the pile cutting connection device 34. In this way, the moving direction of the pile cutting member 35 is directional and the movement is more stable.

[0044] The pile cutting method of the present invention comprises the following steps:

[0045] 1). The pile cutter is connected to the crane's hanging beam, and the crane moves the pile cutter into the steel pile; the steel pile and the crane's hanging beam are fixed; the pile cutting detection device and the rotation detection device are started;

[0046] 2). The drive device is adjusted away from the outer wall of the machine base, the drive device to be adjusted and the fixed support feet are in contact with the inner wall of the steel pile, and the fixing device is stably fixed inside the steel pile;

[0047] 3). Start the pile cutting drive device, which drives the pile cutting member to rotate;

[0048] 4). The cutting pile extension device drives the cutting pile piece to extend out of the cutting pile support, and the cutting pile piece cuts the steel pile; the cutting pile detection device performs real-time detection on the steel pile, and if the detection result is consistent, proceed to step 5);

[0049] 5). The cutting pile extension device drives the cutting pile member to retract the cutting pile support, and the rotary mechanism drives the cutting pile mechanism to rotate 25°; determine whether the cutting pile is completed, if not completed, repeat step 4) until the rotary mechanism drives the cutting pile mechanism to rotate 360°, and the steel pile cutting is completed; proceed to step 6);

[0050] 6). Turn off the pile cutting drive device, the pile cutting extension device drives the pile cutting member to retract the pile cutting support, adjust the drive device close to the outer wall of the machine base, turn off the pile cutting detection device and the rotation detection device, and use a crane to move the pile cutter and the cut steel pile away.

[0051] The above pile cutting method: step 2) is specifically: adjusting the piston rod of the driving device away from the outer wall of the machine base, and adjusting the piston rod of the driving device to contact the inner wall surface of the steel pile.

[0052] In step 4), if the detection result is that the pile cutting member penetrates the steel pile, the pile cutting detection device detects the pressure of the pile cutting drive device to determine whether the pile cutting member penetrates the steel pile; that is, first pre-record the pressure value of the pile cutting drive device when the pile cutting member does not cut the steel pile; then record the pressure value of the pile cutting drive device when the current pile cutting member is cutting the steel pile; then compare the two pressure values; if the values ​​are close, it is determined that the pile cutting member penetrates the steel pile; if the values ​​are greatly different, it is determined that the pile cutting member has not yet penetrated the steel pile.

[0053] In step 5), the rotation detection device performs real-time monitoring. When it is detected that the rotation angle of the pile cutting mechanism reaches 25°, the rotation detection device sends a signal to the rotation mechanism, and the rotation mechanism stops rotating.

[0054] Step 6) is specifically as follows: the piston rod of the drive device is adjusted to be close to the outer wall of the base, and the piston rod of the drive device is adjusted to be separated from the inner wall surface of the steel pile.

[0055] The above method is carried out by connecting the pile cutter to a crane; thus, the pile cutter can be moved inside the steel pile; and by fixing the steel pile to the crane's lifting beam; thus, it is convenient to lift the steel pile after cutting. Then, the pile cutting detection device and the rotation detection device are started; the pile cutting detection device performs real-time detection on the steel pile, and the rotation detection device performs real-time detection on the rotation angle of the pile cutting mechanism; thus, operations can be performed according to the detection results, and the control effect is good; then, the adjustment drive device is controlled to be away from the outer wall of the machine base, and the adjustment drive device and the fixed support foot are both in contact with and fixed to the inner wall of the steel pile; thus, the pile cutter is fixed inside the steel pile by the fixing device, which facilitates pile cutting; then, the pile cutting drive device first drives the pile cutting member to rotate, and the pile cutting extension device then drives the pile cutting member to extend out of the pile cutting support to cut the steel pile; thus, the pile cutting member is in contact with the steel pile in a rotating state and cut; this can avoid the pile cutting piece contacting the steel pile first and then rotating, which will cause the cutting opening on the steel pile to get stuck in the pile cutting piece, which will cause damage to the pile cutting piece; at the same time, when it is detected that the cutting position of the steel pile meets the conditions that the pile cutting piece penetrates the current cutting position of the steel pile, the next step is performed, and then the pile cutting mechanism rotates again; this can ensure that when the pile cutting mechanism completes a 360° rotation; the cut steel pile is separated from the lower end of the steel pile; at the same time, the rotation angle of the pile cutting mechanism is controlled at 25° each time; this can avoid the existence of uncut parts between different cutting positions on the steel pile, and at the same time, it can avoid the rotation angle being too small to cause low work efficiency. Then, when the steel pile cutting is completed, the pile cutting machine and the cut steel pile are lifted away by the crane's lifting beam.

Claims

1. A pile cutter, characterized in that: It includes a machine base, a slewing mechanism and a cutting mechanism; a fixing device is provided on the outer wall of the machine base, the fixing device is used to fix the machine base, and the slewing mechanism is arranged inside the machine base; the cutting mechanism is located below the slewing mechanism and connected to the slewing mechanism; The rotary mechanism includes a rotary device and a transmission device; the transmission device is installed on the inner wall of the machine base, and the rotary device passes through the transmission device and is arranged in the machine base; the rotary device rotates around the transmission device; The pile cutting mechanism device comprises a pile cutting driving device, a pile cutting extending device, a pile cutting support, a pile cutting connecting device and a pile cutting piece; the pile cutting support is connected to a slewing device, and the slewing device drives the pile cutting support to rotate; the pile cutting driving device, the pile cutting extending device, the pile cutting connecting device and the pile cutting piece are all arranged in the pile cutting support; one end of the pile cutting connecting device and one end of the pile cutting extending device are respectively connected to the inner wall of the pile cutting support, and one end of the pile cutting connecting device rotates on the cross section of the pile cutting support around the connection point between the pile cutting connecting device and the inner wall of the pile cutting support, and the pile cutting piece is installed on the other end of the pile cutting connecting device, the pile cutting driving device is connected to the pile cutting piece, and the other end of the pile cutting extending device is connected to the pile cutting connecting device; The cutting pile support is provided with a cutting pile opening; The pile cutting extension device drives the pile cutting member to extend and retract the pile cutting support through the pile cutting opening along the movable direction of the pile cutting connection device; The transmission device comprises a transmission fixing member and a transmission member; the transmission member is mounted on the transmission fixing member; the transmission member is an inner gear ring; The rotary device comprises a rotating shaft, a rotary connecting member and a rotary driving device; the rotary connecting member is connected to the rotating shaft; the rotary driving device is fixed on the rotary connecting member; the rotary driving device is provided with a driving member, which is an external gear matched with the transmission member; The pile cutting connection device comprises an articulated movable part, a connecting part and a fixed part; the articulated movable part is articulated on the inner wall of the pile cutting support, the connecting part is connected to the articulated movable part, and the fixed part is connected to the connecting part; the pile cutting part is installed at the lower end of the fixed part, and the pile cutting driving device is installed at the upper end of the fixed part; the pile cutting driving device drives the pile cutting part to rotate; The fixing device includes a fixing foot and an adjusting device; the fixing foot and the adjusting device are each provided with at least one; the fixing foot and the adjusting device are evenly distributed at the same level on the outer wall of the machine base; The adjusting device comprises an adjusting support leg and an adjusting driving device; the adjusting driving device is installed on the adjusting support leg; The outer wall of the machine base is provided with a sealing door communicating with the interior.

2. A pile cutter according to claim 1, characterized in that: The pile cutting extending device is connected with the connecting piece.

3. A pile cutter according to claim 1, characterized in that: The pile cutter also includes a pile cutting detection device and a rotation detection device.

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