Spiral drilling device for wrapped pile composite foundation

Abstract

The utility model relates to the technical field of foundation construction, in particular to a spiral drilling device for a wrapped pile composite foundation, which comprises a working plate, a plurality of supporting columns are fixed at the bottom end of the working plate, a supporting plate is fixed at the bottom ends of the supporting columns, universal wheels are mounted at the bottom ends of the supporting plate, and a frame is fixed on the top surface of the working plate. A drilling mechanism used for drilling is arranged above the working plate and comprises an auger located between the working plate and the transverse plate end of the frame body and a conical drill bit fixed to the bottom face of a rod body of the auger. Through the arrangement of the working plate, the supporting columns, the supporting plates, the universal wheels, the frame body and the drilling mechanism, drilling operation of foundation pile holes can be conducted, and a water supply pipe of an external water supply device is tightly connected with the water inlet end of a water pump in a sleeved mode. And through the design of the cleaning mechanism, soil on the outer wall of the auger and the outer wall of the drill bit can be cleaned, manual cleaning work after drilling is not needed, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation construction, in particular to a spiral drilling device for a wrapped pile composite foundation. Background Technique

[0002] A wrapped pile composite foundation forms a wrapped pile by wrapping a layer of high-strength geosynthetics, such as geogrids, geotextiles, etc., around the pile body. This wrapped pile and the soil between the piles act together to bear the load transmitted from the upper structure. This type of foundation has the characteristics of improving bearing capacity, reducing settlement, convenient construction, and economy and practicality. During the construction of the wrapped pile composite foundation, it is necessary to carry out the excavation work of the pile hole, and a spiral drilling device is required during the excavation of the pile hole.

[0003] The patent with the publication number CN219034636U discloses a drilling device for foundation construction, which includes a motor and a spiral drill connected to the output rotating shaft of the motor. The bottom outer wall of the motor is fixedly installed with a support plate through a set installation plate, and the lower surface of the support plate is fixedly connected with three groups of sleeves distributed in a triangle.

[0004] Although the adjacent sleeved sleeves in this device are connected by two positioning piles, when the spiral drill is lifted after drilling, several sleeves can extend and reset to wrap the corresponding positioning piles to prevent their bottoms from leaking out and causing potential safety hazards, and it is more applicable in use, providing good guarantee for foundation construction. However, this device does not have a structure for cleaning the spiral drill and the conical bottom, and it is necessary for workers to clean the spiral drill and the conical bottom after the pile hole construction, which is time-consuming and laborious. Content of the Utility Model

[0005] The purpose of the utility model is to provide a spiral drilling device for a wrapped pile composite foundation to solve the problem that the device in the above background technique does not have a structure for cleaning the spiral drill and the conical bottom, and it is necessary for workers to clean the spiral drill and the conical bottom after the pile hole construction, which is time-consuming and laborious.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] The spiral drilling device for a wrapped pile composite foundation includes a working plate. A plurality of support columns are fixed at the bottom end of the working plate, a support plate is fixed at the bottom end of the support columns, a universal wheel is installed at the bottom end of the support plate, a frame body is fixed on the top surface of the working plate, a drilling mechanism for drilling is arranged above the working plate. The drilling mechanism includes an auger located between the working plate and the cross plate end of the frame body, a drill bit fixed on the bottom surface of the auger rod and shaped like a cone, a fixed box located above the auger, and a drilling motor installed on the inner top surface of the fixed box and used to drive the auger to rotate. It further includes:

[0008] The cleaning mechanism is arranged on the top surface of the working plate and is used for cleaning the auger and the drill bit. The cleaning mechanism includes two rotating columns respectively rotatably connected to the working plate and the end of the horizontal plate of the frame, a screw rod coaxially fixed between the two rotating columns, a moving plate threadedly connected to the screw rod and slidably connected to the end of the left vertical plate of the frame, a rotating rod coaxially fixed on the top surface of the upper rotating column, a cleaning motor installed on the top surface of the end of the horizontal plate of the frame and used for driving the rotating rod to rotate, a water passing box fixed on the right surface of the moving plate, a water outlet pipe fixed on the right surface of the water passing box and communicated with its inner cavity, an atomizing nozzle fixed on the right surface of the water outlet pipe and communicated with its inner cavity, a water inlet pipe fixed on the top surface of the water passing box and communicated with its inner cavity, a water pump installed on the top surface of the end of the horizontal plate of the frame, and a water pipe tightly sleeved on the water outlet end of the water pump and fixed to the end of the horizontal plate of the frame, and the water pipe is communicated with the water inlet pipe through a corrugated pipe.

[0009] As a preferred embodiment, the cleaning mechanism further includes two gears meshing with each other above the end of the horizontal plate of the frame and a rotating shaft coaxially connected to the output shaft of the cleaning motor, and the two gears are respectively coaxially fixed on the circumferential outer walls of the rotating shaft and the rotating rod.

[0010] As a preferred embodiment, a guiding groove is provided on the right surface of the end of the left vertical plate of the frame, and a guiding block slidably connected to the guiding groove on the outer wall of the end of the left vertical plate of the frame is fixed on the left surface of the water passing box.

[0011] As a preferred embodiment, the drilling mechanism further includes an electric cylinder with a cylinder body installed on the top surface of the end of the horizontal plate of the frame. The piston rod of the electric cylinder penetrates through the top surface of the end of the horizontal plate of the frame and extends to the lower part of the end of the horizontal plate of the frame. The drilling mechanism further includes a gasket fixed between the bottom surface of the piston rod of the electric cylinder and the top surface of the fixed box, a rotating roller coaxially fixed on the top surface of the auger rod body and rotatably connected to the fixed box, the output shaft of the drilling motor is coaxially connected to the rotating roller, a through hole is provided on the top surface of the working plate, and the positions and sizes of the auger and the drill bit correspond to and match those of the through hole on the top surface of the working plate.

[0012] As a preferred embodiment, the positions of the atomizing nozzle correspond to those of the auger and the drill bit, and the sizes of the atomizing nozzle match those of the auger and the drill bit.

[0013] As a preferred embodiment, two symmetrically arranged traction plates are fixed on the left surface of the working plate, and a through groove is provided on the top surface of the traction plate.

[0014] As a preferred embodiment, the drilling mechanism further includes a protection cylinder fixed on the top surface of the end of the horizontal plate of the frame. The cylinder body of the electric cylinder is located inside the protection cylinder. The cleaning mechanism further includes a protection box fixed on the top surface of the end of the horizontal plate of the frame. The cleaning motor is located inside the protection box, and the rotating shaft penetrates through the top surface of the protection box.

[0015] As a preferred embodiment, sealing rings are provided at the parts where the water outlet pipe contacts the water passing box and the atomizing nozzle, sealing rings are provided at the parts where the corrugated pipe contacts the water inlet pipe and the water passing pipe, and a sealing ring is also provided at the part where the water passing pipe contacts the water outlet end of the water pump.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. The present utility model can perform the drilling operation of the foundation pile hole by setting a working plate, a plurality of support columns, a plurality of support plates, a plurality of universal wheels, a frame body and a drilling mechanism. The water supply pipe of the external water supply device is tightly sleeved with the water inlet end of the water pump. Through the design of the cleaning mechanism, the soil on the outer walls of the auger and the drill bit can be cleaned, eliminating the need for manual cleaning after drilling, which saves time and effort.

[0018] 2. In the present utility model, the positions of the atomizing nozzles correspond to those of the auger and the drill bit, and the sizes of the atomizing nozzles are adapted to those of the auger and the drill bit, enabling the smooth cleaning of the auger and the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the present utility model;

[0020] Figure 2 is the partial structural schematic diagram of the present utility model;

[0021] Figure 3 is the overall structural schematic diagram of the drilling mechanism of the present utility model;

[0022] Figure 4 is one of the partial exploded views of the drilling mechanism of the present utility model;

[0023] Figure 5 is the partial cross-sectional view of the drilling mechanism of the present utility model;

[0024] Figure 6 is the other partial exploded view of the drilling mechanism of the present utility model;

[0025] Figure 7 is the overall structural schematic diagram of the cleaning mechanism of the present utility model;

[0026] Figure 8 is one of the partial exploded views of the cleaning mechanism of the present utility model;

[0027] Figure 9 is the other partial exploded view of the cleaning mechanism of the present utility model;

[0028] Figure 10This is the third partial explosion view of the cleaning mechanism in the present utility model;

[0029] The meanings of the various reference numerals in the figure are as follows:

[0030] 1. Working plate; 2. Support column; 3. Support plate; 4. Universal wheel; 5. Frame body; 6. Drilling mechanism; 61. Electric cylinder; 62. Fixed box; 63. Gasket; 64. Roller; 65. Drilling motor; 66. Auger; 67. Drill bit; 68. Protection cylinder; 7. Cleaning mechanism; 71. Rotating column; 72. Screw rod; 73. Moving plate; 74. Water passing box; 75. Guide block; 76. Water outlet pipe; 77. Atomizing nozzle; 78. Water pump; 79. Water passing pipe; 710. Water inlet pipe; 711. Bellows; 712. Rotating rod; 713. Gear; 714. Cleaning motor; 715. Rotating shaft; 716. Protection box; 8. Traction plate. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0032] Please refer to Figures 1 - 10 , the present utility model provides a technical solution: a spiral drilling device for a wrapped pile composite foundation, including a working plate 1, several support columns 2 are fixed at the bottom end of the working plate 1, a support plate 3 is fixed at the bottom end of the support column 2, a universal wheel 4 is installed at the bottom end of the support plate 3, a frame body 5 is fixed on the top surface of the working plate 1, a drilling mechanism 6 for drilling is provided above the working plate 1, the drilling mechanism 6 includes an auger 66 located between the working plate 1 and the cross plate end of the frame body 5, a drill bit 67 fixed on the bottom surface of the rod body of the auger 66 and having a conical shape, a fixed box 62 located above the auger 66, and a drilling motor 65 installed on the inner top surface of the fixed box 62 and used to drive the auger 66 to rotate. It further includes:

[0033] The cleaning mechanism 7 is arranged on the top surface of the working plate 1 and is used for cleaning the auger 66 and the drill bit 67. The cleaning mechanism 7 includes two rotating columns 71 which are rotatably connected to the working plate 1 and the horizontal plate end of the frame 5 respectively, a screw 72 which is coaxially fixed between the two rotating columns 71, a movable plate 73 which is threadedly connected to the screw 72 and is slidably connected to the left vertical plate end of the frame 5, a rotating rod 712 which is coaxially fixed on the top surface of the upper rotating column 71, a cleaning motor 714 which is installed on the top surface of the horizontal plate end of the frame 5 and is used to drive the rotating rod 712 to rotate, a water-passing box 74 which is fixed on the right side surface of the movable plate 73, a water outlet pipe 76 which is fixed on the right side surface of the water-passing box 74 and is connected to its inner cavity, an atomizing nozzle 77 which is fixed on the right side surface of the water outlet pipe 76 and is connected to its inner cavity, and a spray nozzle 78 which is fixed on the water-passing box 74. An inlet pipe 710 on the top surface and connected to its inner cavity, a water pump 78 installed on the top surface of the horizontal plate end of the frame 5, a water pipe 79 tightly connected to the water outlet end of the water pump 78 and fixed to the horizontal plate end of the frame 5, and the water pipe 79 is connected to the inlet pipe 710 through a bellows 711. By arranging a working plate 1, several support columns 2, several support plates 3, several universal wheels 4, the frame 5 and a drilling mechanism 6, the drilling operation of the foundation pile hole can be carried out, and the water supply pipe of the external water supply device is tightly connected to the water inlet end of the water pump 78. Through the design of the cleaning mechanism 7, the soil on the outer wall of the auger 66 and the drill bit 67 can be cleaned, and there is no need for manual cleaning after drilling, which saves time and effort. It should be added that the universal wheel 4 is a prior art and has a built-in locking structure.

[0034] In this embodiment, the cleaning mechanism 7 also includes two gears 713 located above the horizontal plate end of the frame 5 and meshing with each other, and a rotating shaft 715 coaxially connected to the output shaft of the cleaning motor 714, and the two gears 713 are coaxially fixed on the circumferential outer walls of the rotating shaft 715 and the rotating rod 712, respectively, which can smoothly drive the rotating rod 712 to rotate, and then can smoothly drive the screw 72 to rotate.

[0035] In addition, a guide groove is provided on the right side surface of the left vertical plate end of the frame 5, and a guide block 75 is fixed on the left side surface of the water box 74, which is slidably connected to the guide groove on the outer wall of the left vertical plate end of the frame 5, so as to guide the movement of the movable plate 73, and then smoothly guide the movement of the water outlet pipe 76 and the atomizing nozzle 77.

[0036] Furthermore, the drilling mechanism 6 further includes an electric cylinder 61 with its cylinder body mounted on the top surface of the cross plate end of the frame body 5. The piston rod of the electric cylinder 61 penetrates through the top surface of the cross plate end of the frame body 5 and extends below the cross plate end of the frame body 5. The drilling mechanism 6 further includes a gasket 63 fixed between the bottom surface of the piston rod of the electric cylinder 61 and the top surface of the fixed box 62, and a roller 64 coaxially fixed on the top surface of the screw 66 rod body and rotatably connected to the fixed box 62. The output shaft of the drilling motor 65 is coaxially connected to the roller 64. There is a through hole on the top surface of the working plate 1, and the positions and sizes of the screw 66 and the drill bit 67 correspond to and match the through hole on the top surface of the working plate 1, enabling smooth drilling operation of the foundation pile hole.

[0037] Specifically, the positions of the atomizing nozzles 77 correspond to those of the screw 66 and the drill bit 67, and the sizes of the atomizing nozzles 77 match those of the screw 66 and the drill bit 67, enabling smooth cleaning of the screw 66 and the drill bit 67.

[0038] It should be noted that two symmetric traction plates 8 are fixed on the left surface of the working plate 1, and through grooves are provided on the top surfaces of the traction plates 8. Connecting an external traction device to the two traction plates 8 and cooperating with the use of a number of universal wheels 4 can drive the entire device to move.

[0039] It should be explained that the drilling mechanism 6 further includes a protective cylinder 68 fixed on the top surface of the cross plate end of the frame body 5. The cylinder body of the electric cylinder 61 is located inside the protective cylinder 68. The cleaning mechanism 7 further includes a protective box 716 fixed on the top surface of the cross plate end of the frame body 5. The cleaning motor 714 is located inside the protective box 716, and the rotating shaft 715 penetrates through the top surface of the protective box 716, which can protect the electric cylinder 61 and the cleaning motor 714, thereby extending the service life of the electric cylinder 61 and the cleaning motor 714.

[0040] It should be emphasized that sealing rings are provided at the contact parts of the water outlet pipe 76 with the water passing box 74 and the atomizing nozzles 77, sealing rings are provided at the contact parts of the corrugated pipe 711 with the water inlet pipe 710 and the water passing pipe 79, and a sealing ring is also provided at the contact part of the water passing pipe 79 with the water outlet end of the water pump 78, which can make the sealing performance of the entire device better and prevent water leakage during the transportation process.

[0041] Finally, it should be noted that components such as the electric cylinder 61, drilling motor 65, water pump 78, and cleaning motor 714 involved in the present utility model are all common standard components or components known to those skilled in the art. Their structures and principles can all be learned by those skilled in the art through technical manuals or obtained through conventional experimental methods. At the idle positions of this device, all the above-mentioned electrical components, referring to power elements, electrical components, and the adapted controllers and power supplies, are connected by wires. The specific connection means should refer to the working principle of the present utility model. The electrical components are electrically connected in accordance with the sequential working order. Their detailed connection means are all well-known technologies in the art.

[0042] During the specific use of this embodiment, when drilling operations are required, first connect the external traction device to the two traction plates 8 and cooperate with the use of several universal wheels 4 to drive the entire device to move. Subsequently, the entire device can be positioned through the locking structure in several universal wheels 4. Immediately afterwards, start the electric cylinder 61 and the drilling motor 65 through the external PLC. The piston rod of the electric cylinder 61 moves, driving the fixed box 62 fixed to it through the gasket 63 to move downward. The downward movement of the fixed box 62 drives the roller 64, the auger 66, and the drill bit 67 to move downward. At the same time, the output shaft of the drilling motor 65 rotates, driving the roller 64 coaxially connected to it to rotate. The rotation of the roller 64 drives the auger 66 coaxially fixed to it to rotate. The rotation of the auger 66 drives the drill bit 67 fixed to it to rotate, enabling the auger 66 and the drill bit 67 to pass through the through-hole on the top surface of the working plate 1 and insert into the soil for drilling operations. When the drilling reaches an appropriate depth, turn off the drilling motor 65 through the external PLC and control the piston rod of the electric cylinder 61 to perform a retraction movement. The retraction movement of the piston rod of the electric cylinder 61 can drive the auger 66 and the drill bit 67 to move upward. When the auger 66 and the drill bit 67 move to an appropriate height position, turn off the electric cylinder 61 through the external PLC;

[0043] According to the above description, the entire device can be moved to an appropriate position and positioned. Subsequently, tightly sleeve the water supply pipe of the external water supply device onto the water inlet end of the water pump 78. Then, start the drilling motor 65, the water pump 78, and the cleaning motor 714 through the external PLC and control the output shaft of the cleaning motor 714 to rotate forward and backward alternately. According to the above description, the rotation of the output shaft of the drilling motor 65 can drive the auger 66 and the drill bit 67 to rotate. After the water pump 78 is started, the water in the external water supply device is transported from the water supply pipe into the through-water pipe 79. The water entering the through-water pipe 79 then enters the corrugated pipe 711 and enters the water inlet pipe 710. The water entering the water inlet pipe 710 then enters the water through-box 74 and enters the water outlet pipe 76. The water entering the water outlet pipe 76 then enters the atomizing nozzle 77 and is sprayed out by the atomizing nozzle 77;

[0044] Meanwhile, the rotation of the output shaft of the cleaning motor 714 drives the rotation of the rotating shaft 715 coaxially connected thereto. The rotation of the rotating shaft 715 drives the rotation of the same-side gear 713 coaxially fixed thereto. The rotation of this gear 713 drives the rotation of another gear 713 meshing with it. The rotation of the other gear 713 drives the rotation of the rotating rod 712 coaxially fixed thereto. The rotation of the rotating rod 712 drives the rotation of the same-side rotating column 71 coaxially fixed thereto. The rotation of this rotating column 71 drives the rotation of the screw rod 72 coaxially fixed thereto. The rotation of the screw rod 72 drives the movement of the moving plate 73 threadedly connected thereto. The moving plate 73 moves under the guiding action of the guiding block 75 and the guiding grooves on the outer walls of the vertical plate ends on the same side of the frame body 5. Because the output shaft of the cleaning motor 714 rotates in a positive and negative alternating manner, the screw rod 72 can be indirectly driven to rotate in a positive and negative alternating manner, so that the moving plate 73 can perform a linear reciprocating motion in the vertical direction. The movement of the moving plate 73 can drive the water passing box 74, the water outlet pipe 76 and the atomizing nozzle 77 to perform a linear reciprocating motion in the vertical direction. Meanwhile, the auger 66 and the drill bit 67 are in a rotating state. According to the above description, the auger 66 and the drill bit 67 can be cleaned accordingly.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. The spiral drilling device for the wrapped pile composite foundation, including a working plate (1), is characterized in that, A number of support columns (2) are fixed to the bottom end of the working plate (1). The bottom end of the support column (2) is fixed with a support plate (3). A universal wheel (4) is installed at the bottom end of the support plate (3). A frame body (5) is fixed on the top surface of the working plate (1). Above the working plate (1), there is a drilling mechanism (6) for drilling. The drilling mechanism (6) includes an auger (66) located between the working plate (1) and the cross plate end of the frame body (5), a drill bit (67) fixed to the bottom surface of the auger (66) rod body and having a conical shape, a fixed box (62) located above the auger (66), and a drilling motor (65) installed on the inner top surface of the fixed box (62) and used to drive the auger (66) to rotate. It also includes: A cleaning mechanism (7) is arranged on the top surface of the working plate (1) and is used to clean the auger (66) and the drill bit (67). The cleaning mechanism (7) includes two rotating columns (71) respectively rotatably connected to the working plate (1) and the cross plate end of the frame body (5), a screw rod (72) coaxially fixed between the two rotating columns (71), a moving plate (73) threadedly connected to the screw rod (72) and slidably connected to the left vertical plate end of the frame body (5), a rotating rod (712) coaxially fixed to the top surface of the upper rotating column (71), a cleaning motor (714) installed on the top surface of the cross plate end of the frame body (5) and used to drive the rotating rod (712) to rotate, a water passing box (74) fixed to the right surface of the moving plate (73), a water outlet pipe (76) fixed to the right surface of the water passing box (74) and communicating with its inner cavity, an atomizing nozzle (77) fixed to the right surface of the water outlet pipe (76) and communicating with its inner cavity, a water inlet pipe (710) fixed to the top surface of the water passing box (74) and communicating with its inner cavity, a water pump (78) installed on the top surface of the cross plate end of the frame body (5), and a water passing pipe (79) tightly sleeved on the water outlet end of the water pump (78) and fixed to the cross plate end of the frame body (5). The water passing pipe (79) is connected to the water inlet pipe (710) through a corrugated pipe (711).

2. The spiral drilling device for the wrapped pile composite foundation according to claim 1, characterized in that: The cleaning mechanism (7) further includes two gears (713) located above the cross plate end of the frame body (5) and meshing with each other, and a rotating shaft (715) coaxially connected to the output shaft of the cleaning motor (714). The two gears (713) are respectively coaxially fixed on the circumferential outer walls of the rotating shaft (715) and the rotating rod (712).

3. The spiral drilling device for the wrapped body pile composite foundation according to claim 1, characterized in that: A guide groove is provided on the right surface of the left vertical plate end of the frame body (5), and a guide block (75) slidably connected to the guide groove on the outer wall of the left vertical plate end of the frame body (5) is fixed to the left surface of the water passing box (74).

4. The spiral drilling device for the wrapped pile composite foundation according to claim 2, characterized in that: The drilling mechanism (6) further includes an electric cylinder (61) with its cylinder body mounted on the top surface of the cross plate end of the frame body (5). The piston rod of the electric cylinder (61) penetrates through the top surface of the cross plate end of the frame body (5) and extends below the cross plate end of the frame body (5). The drilling mechanism (6) further includes a gasket (63) fixed between the bottom surface of the piston rod of the electric cylinder (61) and the top surface of the fixed box (62), and a roller (64) coaxially fixed on the top surface of the screw conveyor (66) rod body and rotatably connected to the fixed box (62). The output shaft of the drilling motor (65) is coaxially connected to the roller (64). A through hole is provided on the top surface of the working plate (1), and the positions and sizes of the screw conveyor (66) and the drill bit (67) are corresponding to and adapted to the through hole on the top surface of the working plate (1).

5. The spiral drilling device for the wrapped pile composite foundation according to claim 1, characterized in that: The positions of the atomizing nozzles (77) are corresponding to those of the screw conveyor (66) and the drill bit (67), and the sizes of the atomizing nozzles (77) are adapted to those of the screw conveyor (66) and the drill bit (67).

6. The spiral drilling device for the wrapped pile composite foundation according to claim 1, characterized in that: Two symmetrically arranged traction plates (8) are fixed on the left side surface of the working plate (1), and through grooves are provided on the top surfaces of the traction plates (8).

7. The spiral drilling device for the wrapped pile composite foundation according to claim 4, characterized in that: The drilling mechanism (6) further includes a protective cylinder (68) fixed on the top surface of the cross plate end of the frame body (5). The cylinder body of the electric cylinder (61) is located inside the protective cylinder (68). The cleaning mechanism (7) further includes a protective box (716) fixed on the top surface of the cross plate end of the frame body (5). The cleaning motor (714) is located inside the protective box (716), and the rotating shaft (715) penetrates through the top surface of the protective box (716).

8. The spiral drilling device for the wrapped pile composite foundation according to claim 1, characterized in that: Sealing rings are provided at the contact parts of the water outlet pipe (76) with the water passing box (74) and the atomizing nozzles (77). Sealing rings are provided at the contact parts of the corrugated pipe (711) with the water inlet pipe (710) and the water passing pipe (79). A sealing ring is also provided at the contact part of the water passing pipe (79) with the water outlet end of the water pump (78).

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