Spraying and stirring device of cement stirring pile machine

Abstract

The utility model belongs to the technical field of building construction, and particularly relates to a cement mixing pile machine spraying and mixing device which comprises a center shaft and an external pipe arranged outside the center shaft, the center shaft and the external pipe synchronously rotate and can relatively move in the vertical direction, and the upper end of the center shaft extends to the upper side of the external pipe and is provided with a grouting opening. The lower end of the center shaft is provided with a grout outlet located on the inner side of the external pipe, a through groove communicated with the grout outlet and the grout outlet is formed in the center shaft, the bottom of the center shaft extends to the lower side of the external pipe and is provided with a drill bit, spiral blades are arranged on the outer surface of the external pipe, and a plurality of stirring rods arranged between the spiral blades at intervals are installed on the external pipe. According to the utility model, by changing the inclination angles of the stirring blades, the functions of stirring slurry and improving the grouting quality are achieved on the premise that the load during drilling work of equipment is prevented from being increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and particularly relates to a cement mixing pile machine spraying and stirring device. Background Art

[0002] Cement mixing piles spray cement into the soil and mix it thoroughly, causing a series of physical and chemical reactions between the cement and the soft soil, hardening the soft soil and improving the foundation strength.

[0003] In order to improve the grouting quality, existing cement mixing piles usually have an additional stirring device for the slurry. However, in the initial drilling work, the stirring device conflicts with the moving soft soil, resulting in increased resistance to the drilling action and increased load on the equipment operation.

[0004] The utility model designs a cement mixing pile machine spray stirring device to solve the above problems. Utility Model Content

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A cement mixing pile machine spraying device comprises a central shaft and an external tube arranged outside the central shaft, the central shaft and the external tube rotate synchronously and can move relative to each other in the vertical direction, the upper end of the central shaft extends to the upper side of the external tube and is provided with a grouting port, the lower end of the central shaft is provided with a slurry outlet located inside the external tube, a through groove connecting the grouting port and the slurry outlet is provided in the central shaft, the bottom of the central shaft extends to the lower side of the external tube and is installed with a drill bit, the outer surface of the external tube is provided with spiral blades, a plurality of stirring rods arranged between the spiral blades at intervals are installed on the external tube, the outer ends of the stirring rods are provided with stirring blades, and a gear rack assembly is provided between the central shaft and the inner ends of the stirring rods.

[0007] As a preferred solution, the lower end of the central axis is in the shape of a quadrangular prism, and the inner wall of the external tube is in contact with the outer wall of the central axis.

[0008] As a preferred solution, a groove is provided on the side of the lower end of the central shaft, and the rack and pinion assembly includes a rack installed in the groove and several gears corresponding to the position of the stirring rod, the gear is meshed with the rack, and the inner end of the stirring rod is connected to the gear power.

[0009] As a preferred solution, the drill bit is rotatably connected to the central shaft, a first transmission tooth is installed on the upper end of the drill bit, and a second transmission tooth that can mesh with the first transmission tooth is installed on the lower end of the external tube.

[0010] As a preferred solution, the upper end of the central shaft is cylindrical in shape, and is provided with an internal thread. A rotatably connected threaded tube is installed on the upper end of the external tube, and the threaded tube is located outside the central shaft and meshes with the internal thread.

[0011] Compared with the existing technology, the advantages of the utility model are:

[0012] 1. In the initial state of the drilling working mode, the stirring blade is in an inclined state parallel to the spiral extension track of the spiral blade. The spiral blade moving with the external tube transports the soil to the ground, and the stirring blade moving with the external tube cuts into the soil being transported upward in an inclined state, so as to reduce the resistance of the stirring blade to the movement of the soil, thereby avoiding an increase in the load of the equipment during drilling work;

[0013] In the grouting working mode, the central axis is in a state of downward movement relative to the external tube. In this state, the grouting port is exposed to the outside of the equipment, and the stirring blades are turned to a vertical state. Not only does the large-area grouting port provide higher grouting efficiency, but the stirring blades can also stir the slurry to improve the grouting quality. Therefore, this equipment achieves the purpose of stirring the slurry to improve the grouting quality without increasing the resistance to the drilling action. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the utility model.

[0015] Figure 2 It is a schematic diagram of the utility model in the drilling working mode.

[0016] Figure 3 It is a schematic diagram of the utility model in the grouting working mode.

[0017] Figure 4 It is a cross-sectional schematic diagram of the utility model.

[0018] Figure 5 This utility model Figure 1 Schematic diagram of the drilling working mode from perspective A.

[0019] Figure 6 This utility model Figure 1 Schematic diagram of the grouting working mode from perspective A.

[0020] The reference numbers in the figure are: 1. Central axis; 2. External tube; 3. Grouting port; 4. Slurry outlet; 5. Drill bit; 6. Spiral blade; 7. Stirring rod; 8. Stirring blade; 9. Rack and pinion assembly; 10. Groove; 11. Rack; 12. Gear; 13. First transmission tooth; 14. Second transmission tooth; 15. Internal thread; 16. Threaded pipe. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments or drawings are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] A cement mixing pile machine spraying device, such as Figures 1 to 4 As shown, it includes a central axis 1 and an external tube 2 arranged outside the central axis 1, the upper end of the central axis 1 is cylindrical, the lower end of the central axis 1 is quadrangular, the upper end of the central axis 1 is cylindrical and the inner wall of the external tube 2 is in contact with the outer wall of the central axis 1, the central axis 1 and the external tube 2 rotate synchronously and can move relative to each other in the vertical direction;

[0023] The upper end of the central shaft 1 extends to the upper side of the external pipe 2 and is provided with a grouting port 3, the lower end of the central shaft 1 is provided with a grouting port 4 located inside the external pipe 2, a through groove connecting the grouting port 3 and the grouting port 4 is provided inside the central shaft 1, the bottom of the central shaft 1 extends to the lower side of the external pipe 2 and is installed with a drill bit 5, the top of the central shaft 1 is connected to the power equipment in the cement mixing pile machine, the central shaft 1 drives the entire spraying device to rotate and lift, and the grouting port 3 is connected to the slurry conveying pipeline in the cement mixing pile machine;

[0024] The outer surface of the external tube 2 is provided with a spiral blade 6 , and a plurality of stirring rods 7 are installed on the external tube 2 and are arranged between the spiral blades 6 . The outer end of the stirring rod 7 is provided with a stirring blade 8 , and a gear rack assembly 9 is provided between the central shaft 1 and the inner end of the stirring rod 7 .

[0025] In the initial state of the drilling working mode, the stirring blade 8 is in an inclined state parallel to the spiral extension track of the spiral blade 6. The spiral blade 6 moving with the external tube 2 transports the soil to the ground, and the stirring blade 8 moving with the external tube 2 cuts into the soil being transported upward in an inclined state, so as to reduce the resistance of the stirring blade 8 to the movement of the soil, thereby avoiding an increase in the load of the equipment during drilling work;

[0026] In the grouting working mode, the central axis 1 is in a downward state relative to the external tube 2. In this state, the grouting port 3 is exposed to the outside of the equipment, and the stirring blade 8 is turned to a vertical state. Not only does the large-area grouting port 3 provide a higher grouting efficiency, but the stirring blade 8 can also stir the slurry to improve the grouting quality. Therefore, the equipment achieves the purpose of stirring the slurry to improve the grouting quality without increasing the resistance to the drilling action.

[0027] like Figure 4 As shown, an internal thread 15 is provided at the upper end of the central axis 1, and a rotatably connected threaded tube 16 is installed at the upper end of the external tube 2. The threaded tube 16 is located on the outside of the central axis 1 and meshes with the internal thread 15. By rotating the threaded tube 16, the relative position between the central axis 1 and the external tube 2 in the vertical direction can be changed.

[0028] like Figure 5 and Figure 6As shown, a groove 10 is provided on the side of the lower end of the central shaft 1, and the gear rack assembly 9 includes a rack 11 installed in the groove 10 and a plurality of gears 12 corresponding to the position of the stirring rod 7. The gear 12 is meshed with the rack 11, and the inner end of the stirring rod 7 is dynamically connected to the gear 12. When the central shaft 1 moves downward relative to the external tube 2, the rack 11 moving with the central shaft 1 drives the gear 12 to rotate, and the stirring rod 7 connected to the gear 12 can control the stirring blade 8 to rotate to a vertical state.

[0029] The drill bit 5 is rotatably connected to the central shaft 1, a first transmission tooth 13 is installed on the upper end of the drill bit 5, and a second transmission tooth 14 that can mesh with the first transmission tooth 13 is installed on the lower end of the external tube 2. In the initial state of the drilling working mode, the first transmission teeth 13 are meshed with the second transmission teeth 14. When the central shaft 1 drives the external tube 2 to rotate, the external tube 2 can drive the drill bit 5 to rotate. In the grouting working mode, the first transmission teeth 13 are separated from the second transmission teeth 14, and the drill bit 5 can rotate freely with the soil and slurry, thereby achieving the purpose of reducing the surface wear of the drill bit 5 during grouting.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A cement mixing pile machine spraying device, characterized in that: The invention comprises a central shaft (1) and an external tube (2) arranged outside the central shaft (1), the central shaft (1) and the external tube (2) rotate synchronously and can move relative to each other in the vertical direction, the upper end of the central shaft (1) extends to the upper side of the external tube (2) and is provided with a grouting port (3), the lower end of the central shaft (1) is provided with a grouting port (4) located inside the external tube (2), a through groove connecting the grouting port (3) and the grouting port (4) is provided inside the central shaft (1), the bottom of the central shaft (1) extends to the lower side of the external tube (2) and is provided with a drill bit (5), the outer surface of the external tube (2) is provided with spiral blades (6), a plurality of stirring rods (7) arranged at intervals between the spiral blades (6) are installed on the external tube (2), the outer ends of the stirring rods (7) are provided with stirring blades (8), and a gear rack assembly (9) is provided between the central shaft (1) and the inner ends of the stirring rods (7).

2. A cement mixing pile machine spraying device according to claim 1, characterized in that: The lower end of the central axis (1) is in the shape of a quadrangular prism, and the inner wall of the external tube (2) fits closely with the outer wall of the central axis (1).

3. A cement mixing pile machine spraying device according to claim 2, characterized in that: A groove (10) is provided on the side surface of the lower end of the central shaft (1), and the gear rack assembly (9) comprises a gear rack (11) installed in the groove (10) and a plurality of gears (12) corresponding to the positions of the stirring rods (7), the gears (12) meshing with the gear rack (11), and the inner end of the stirring rod (7) is connected to the gears (12) in a power connection.

4. A cement mixing pile machine spraying device according to claim 2, characterized in that: The drill bit (5) is rotatably connected to the central shaft (1); a first transmission tooth (13) is mounted on the upper end of the drill bit (5); and a second transmission tooth (14) capable of meshing with the first transmission tooth (13) is mounted on the lower end of the external tube (2).

5. A cement mixing pile machine spraying device according to claim 2, characterized in that: The upper end of the central shaft (1) is cylindrical in shape, and is provided with an internal thread (15). A rotatably connected threaded tube (16) is installed at the upper end of the external tube (2), and the threaded tube (16) is located outside the central shaft (1) and meshes with the internal thread (15).

Images