Bidirectional stirring device for cement-soil stirring pile

Abstract

The utility model discloses a bidirectional stirring device for a cement soil stirring pile, which relates to the technical field of cement soil stirring construction, and comprises a drilling machine, a stirring assembly and a transmission assembly, the stirring assembly comprises a main drilling rod, an auxiliary drilling sleeve, a slurry feeding channel, a slurry outlet hole, a first stirring blade and a second stirring blade; the transmission assembly comprises a first transmission part arranged on the main drill rod, a second transmission part arranged on the auxiliary drill sleeve and a third transmission part arranged on the connecting sleeve, and the third transmission part is meshed with the first transmission part and the second transmission part so that the rotation directions of the first transmission part and the second transmission part can be opposite; by arranging a main drill rod and an auxiliary drill sleeve, under meshing of a first transmission part, a second transmission part and a third transmission part, the main drill rod rotates to drive the auxiliary drill sleeve to rotate reversely, so that a first stirring blade and a second stirring blade rotate reversely, and in the cement soil stirring and uniform mixing process, bidirectional stirring is provided, so that cement soil stirring is accelerated, cement soil is more uniform, and the working efficiency is improved. The stirring efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of cement-soil mixing construction technology, specifically to a bidirectional mixing device for cement-soil mixing piles. Background Technology

[0002] Cement-soil mixing piles are a common method for treating soft soil foundations. They are made by spraying cement into the soft soil foundation and mixing it with the soft soil to enhance the bearing capacity of the foundation. However, during the construction of cement-soil mixing piles, there is a problem of uneven mixing of cement and soil, which results in low strength of the cement and soil in the pile body. This requires repeated re-mixing, which leads to low construction efficiency and long cycle.

[0003] Utility model patent CN216664105U discloses a drill rod for cement-soil mixing piles, including a drill rod, a drill bit, a grout inlet hole, an air inlet hole, mixing blades, and a grout outlet hole. The drill bit is connected and installed at the bottom of the drill rod, and the mixing blades are connected and installed on the outer wall of the drill rod. The grout inlet hole and the air inlet hole are installed inside the drill rod, and the grout outlet hole is installed at the bottom of the drill rod, above the drill bit. The short side of the mixing blade has an arc, and the mixing blade and the drill rod are at a certain welding angle, so that the blade mixing is not just simple horizontal cutting, but multi-directional cutting, which can effectively ensure the crushing of the soil by the blade and the mixing effect of cement-soil. In this patent, during the mixing of cement-soil, the overall mixing direction is the rotation direction of the drill rod, and the mixing direction is unique, making it difficult to quickly mix the cement-soil evenly. Utility Model Content

[0004] The main purpose of this utility model is to provide a bidirectional mixing device for cement-soil mixing piles, which solves the problem that existing cement-soil mixing piles have a single overall mixing direction during the mixing process, making it difficult to quickly and evenly mix cement and soil.

[0005] To achieve the above objectives, this utility model provides a bidirectional mixing device for cement-soil mixing piles, including a drilling rig, a connecting sleeve on the drilling rig, and a driving component inside the connecting sleeve; it also includes:

[0006] The mixing assembly includes a main drill rod detachably connected to a drive component and an auxiliary drill sleeve rotatably mounted on a connecting sleeve. The main drill rod has a slurry delivery channel inside and a slurry outlet hole communicating with the slurry delivery channel on its outer wall. Multiple sets of first mixing blades are spaced apart at one end of the main drill rod near the slurry outlet hole. The first mixing blades are inclined upwards relative to the axis of the main drill rod. The auxiliary drill sleeve is fitted over the main drill rod and is concentrically mounted with it. A second mixing blade is provided on the outer wall of the auxiliary drill sleeve facing the first mixing blade. The second mixing blade is inclined downwards relative to the axis of the auxiliary drill sleeve.

[0007] The transmission assembly includes a first transmission component mounted on the main drill pipe, a second transmission component mounted on the auxiliary drill sleeve, and a third transmission component mounted on the connecting sleeve; the third transmission component meshes with the first and second transmission components to make the rotation directions of the first and second transmission components opposite.

[0008] As a further improvement of this utility model, the connecting sleeve is provided with a connecting plate; the connecting plate is provided with a rotating groove; one end of the auxiliary drilling sleeve is rotatably installed in the rotating groove, and the other end of the auxiliary drilling sleeve is located at the upper end of the first stirring blade.

[0009] As a further improvement of this utility model, four sets of slurry outlet holes are arranged at intervals along the circumference of the main drill rod, and the slurry outlet holes are located between the spaced-apart first stirring blades.

[0010] As a further improvement of this utility model, both the first stirring blade and the second stirring blade are arc-shaped structures; the middle part of the first stirring blade is concave to form a first arc groove; the middle part of the second stirring blade is concave to form a second arc groove.

[0011] As a further improvement of this utility model, the first transmission component includes a first transmission gear disposed on the outer wall of the main drill pipe; the second transmission component includes a first transmission gear ring disposed on the inner wall of the auxiliary drill sleeve; the third transmission includes a second transmission gear rotatably connected to the connecting sleeve; the second transmission gear meshes with the first transmission gear and the second transmission gear ring respectively.

[0012] As a further improvement of this utility model, the bottom end of the main drill rod is also provided with a transverse stirring blade.

[0013] The beneficial effects of this utility model are reflected in:

[0014] By setting up a main drill rod and an auxiliary drill sleeve, under the meshing of the first, second, and third transmission components, the rotation of the main drill rod drives the auxiliary rotating sleeve to rotate in the opposite direction, thereby causing the first and second mixing blades to rotate in the opposite direction. During the mixing and homogenization of cement and soil, bidirectional mixing is provided, thereby accelerating the mixing of cement and soil, making the cement and soil more uniform, and improving the mixing efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a bidirectional mixing device for cement-soil mixing piles according to the present invention.

[0016] Figure 2 This is a schematic diagram of the internal connection structure of the connecting plate of a bidirectional mixing device for cement-soil mixing piles according to this utility model.

[0017] Figure 3 This is a schematic diagram of the connecting plate structure of a bidirectional mixing device for cement-soil mixing piles according to this utility model;

[0018] Figure 4 This is a schematic diagram of the internal connection structure of the auxiliary drilling sleeve of a bidirectional mixing device for cement-soil mixing piles according to this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Drilling rig; 2. Connecting sleeve; 3. Drive component; 4. Main drill rod; 5. Auxiliary drill sleeve; 6. Slurry delivery channel; 7. Slurry outlet hole; 8. First stirring blade; 9. Second stirring blade; 10. First transmission component; 1001 First transmission gear; 11. Second transmission component; 1101 First transmission gear ring; 12. Third transmission component; 1201 Second transmission gear; 13. Connecting disc; 14. Rotating groove; 15. Inner ring; 16. Outer ring; 17. Bolt; 18. Bearing; 19. Fixing ring; 20. First arc groove; 21. Second arc groove; 22. Connecting rod; 23. Transverse stirring blade. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] In one embodiment, see Figure 1 The present invention relates to a bidirectional mixing device for cement-soil mixing piles, comprising a drilling rig 1, a mixing assembly, and a transmission assembly.

[0023] The drilling rig 1 is equipped with a connecting sleeve 2, and a driving component 3 is installed inside the connecting sleeve 2. The mixing assembly includes a main drill rod 4 detachably connected to the driving component 3 and an auxiliary drill sleeve 5 rotatably mounted on the connecting sleeve 2. The main drill rod 4 has a slurry delivery channel 6 inside, and a slurry outlet hole 7 communicating with the slurry delivery channel 6 is provided on the outer wall of the main drill rod 4. Multiple sets of first mixing blades 8 are spaced apart at one end of the main drill rod 4 near the slurry outlet hole 7. The first mixing blades 8 are inclined upward relative to the axis of the main drill rod 4. The auxiliary drill sleeve 5 is sleeved on the outside of the main drill rod 4 and is connected to the connecting sleeve 2. The main drill rod 4 is concentrically arranged, and the auxiliary drill sleeve 5 has a second stirring blade 9 on the outer wall of the end facing the first stirring blade 8. The second stirring blade 9 is inclined downward relative to the axis of the auxiliary drill sleeve 5. The transmission assembly includes a first transmission component 10 arranged on the main drill rod 4, a second transmission component 11 arranged on the auxiliary drill sleeve 5, and a third transmission component 12 arranged on the connecting sleeve 2. The third transmission component 12 meshes with the first transmission component 10 and the second transmission component 11 so that the rotation directions of the first transmission component 10 and the second transmission component 11 are opposite.

[0024] Further, see Figure 1 , 2 The connecting sleeve 2 is provided with a connecting plate 13, and the connecting plate 13 is provided with a rotating groove 14. One end of the auxiliary drilling sleeve 5 is rotatably installed in the rotating groove 14, and the other end of the auxiliary drilling sleeve 5 is located at the upper end of the first stirring blade 8.

[0025] Preferred, see Figure 3 The connecting plate 13 is a hollow cylinder with openings at both ends. An inner ring 15 is provided on the inner wall of the bottom end of the connecting plate 13, and a rotating groove 14 is formed between the inner ring 15 and the hollow interior of the connecting plate 13. An outer ring 16 is provided on the outer wall of the top end of the connecting plate 13, and the outer ring 16 is connected to the connecting sleeve 2 by bolts 17.

[0026] Preferably, a bearing 18 is provided in the rotating groove 14, and a fixing ring 19 is provided on the top outer wall of the auxiliary drill sleeve 5. The fixing ring 19 is in contact with the inner ring 15, and the outer wall of the auxiliary drill sleeve 5 is fixedly connected to the inner ring of the bearing 18.

[0027] In the above configuration, the auxiliary drill sleeve 5 and the connecting sleeve 2 are rotatably connected by the connecting plate 13, so that the auxiliary drill sleeve 5 is fitted outside the main drill rod 4 and is concentric with the main drill rod 4. The bottom end of the auxiliary drill sleeve 5 is located above the first stirring blade 8 and will not obstruct the rotation of the first stirring blade 8. The second stirring blade 9 is located above the first stirring blade 8, and the two do not interfere with each other when they rotate.

[0028] Further, see Figure 1 Four sets of slurry outlet holes 7 are arranged at intervals along the circumference of the main drill rod 4, and the slurry outlet holes 7 are located between the first stirring blades 8 arranged at intervals.

[0029] Preferably, four groups of first stirring blades 8 are arranged at intervals from bottom to top, and two groups of first stirring blades 8 are arranged from left to right, for a total of eight groups of first stirring blades 8; the number and arrangement of second stirring blades 9 are the same as those of first stirring blades 8.

[0030] In the above configuration, the slurry outlet 7 is located between the first mixing blades 8. After the cement is sprayed out from the slurry outlet 7, the first mixing blades 8 rotate with the main drill rod 4 to mix the cement with the soft soil foundation.

[0031] Further, see Figure 1 Both the first stirring blade 8 and the second stirring blade 9 are arc-shaped structures. The middle part of the first stirring blade 8 is concave to form a first arc groove 20, and the middle part of the second stirring blade 9 is concave to form a second arc groove 21.

[0032] Preferably, there is a gap in the vertical direction between the upper and lower surfaces of the first stirring blade 8 and the second stirring blade 9.

[0033] In the above configuration, both the first mixing blade 8 and the second mixing blade 9 are arc-shaped structures. During the rotation of the first mixing blade 8 and the second mixing blade 9, the cement-soil rotates and moves upward under the guidance of the first mixing blade 8, and rotates and moves downward under the guidance of the second mixing blade 9. The two cement-soil mixtures mix with each other and rotates in opposite directions, thereby improving the uniformity of cement-soil mixing.

[0034] Further, see Figure 2 , 4 The first transmission component 10 includes a first transmission gear 1001 disposed on the outer wall of the main drill rod 4, the second transmission component 11 includes a first transmission gear ring 1101 disposed on the inner wall of the auxiliary drill sleeve 5, and the third transmission includes a second transmission gear 1201 rotatably connected to the connecting sleeve 2. The second transmission gear 1201 meshes with the first transmission gear 1001 and the second transmission gear ring respectively.

[0035] Preferably, the first transmission gear 1001, the transmission gear, and the first transmission gear ring 1101 are all located near the connecting sleeve 2.

[0036] Preferably, a connecting rod 22 is provided between the second transmission gear 1201 and the connecting sleeve 2.

[0037] In the above configuration, the drive unit 3 drives the main drill rod 4 to rotate, causing the first stirring blade 8 and the first transmission gear 1001 to rotate. The first stirring blade 8 rotates to mix the cement and soil. The first transmission gear 1001 rotates and meshes with the second transmission gear 1201, thereby driving the second transmission gear 1201 to rotate. The second transmission gear 1201 meshes with the first transmission rack, causing the first transmission rack to drive the auxiliary drill sleeve 5 to rotate. The direction of rotation of the auxiliary drill sleeve 5 is opposite to the direction of rotation of the main drill rod 4, so that the first stirring blade 8 rotates in the opposite direction to the main drill rod 4, thereby accelerating the mixing of the cement and soil and making the cement and soil evenly mixed.

[0038] Further, see Figure 1 The bottom end of the main drill rod 4 is also equipped with a transverse stirring blade 23.

[0039] Preferably, two sets of transverse stirring blades 23 are symmetrically arranged.

[0040] In the above configuration, since the first mixing blade 8 is inclined, it forms a "cone" shape during the mixing of cement and soil, making it difficult for the cement and soil at the bottom to be mixed. During the rotation of the transverse mixing blade 23, the cement and soil at the bottom is rotated and mixed.

[0041] In this embodiment, the main drill rod 4 is driven to rotate by the drive component 3. Under the mutual meshing of the first transmission gear 1001, the second transmission gear 1201, and the first transmission rack, the main drill rod 4 and the auxiliary drill sleeve 5 rotate in opposite directions. During the reverse rotation of the main drill rod 4 and the auxiliary drill sleeve 5, the first stirring blade 8 and the second stirring blade 9 rotate in opposite directions to mix the cement and soil. The first stirring blade 8 drives the cement and soil to rotate and moves upward at the same time, while the second stirring blade 9 drives the cement and soil to rotate and moves downward at the same time. The stirring in different directions makes the cement and soil more quickly and evenly mixed.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bidirectional mixing device for cement-soil mixing piles, comprising a drilling rig (1), a connecting sleeve (2) provided on the drilling rig (1), and a driving component (3) provided inside the connecting sleeve (2); characterized in that, Also includes: The mixing assembly includes a main drill rod (4) detachably connected to a drive component (3) and an auxiliary drill sleeve (5) rotatably mounted on a connecting sleeve (2). The main drill rod (4) has a slurry delivery channel (6) inside and a slurry outlet hole (7) communicating with the slurry delivery channel (6) on its outer wall. Multiple sets of first mixing blades (8) are spaced apart at one end of the main drill rod (4) near the slurry outlet hole (7). The first mixing blades (8) are inclined upward relative to the axis of the main drill rod (4). The auxiliary drill sleeve (5) is fitted outside the main drill rod (4) and is concentric with the main drill rod (4). A second mixing blade (9) is provided on the outer wall of the auxiliary drill sleeve (5) facing the first mixing blade (8). The second mixing blade (9) is inclined downward relative to the axis of the auxiliary drill sleeve (5). The transmission assembly includes a first transmission member (10) disposed on the main drill rod (4), a second transmission member (11) disposed on the auxiliary drill sleeve (5), and a third transmission member (12) disposed on the connecting sleeve (2); the third transmission member (12) meshes with the first transmission member (10) and the second transmission member (11) so that the rotation directions of the first transmission member (10) and the second transmission member (11) are opposite.

2. The bidirectional mixing device for cement-soil mixing piles according to claim 1, characterized in that: The connecting sleeve (2) is provided with a connecting plate (13); the connecting plate (13) is provided with a rotating groove (14); one end of the auxiliary drilling sleeve (5) is rotatably installed in the rotating groove (14), and the other end of the auxiliary drilling sleeve (5) is located at the upper end of the first stirring blade (8).

3. The bidirectional mixing device for cement-soil mixing piles according to claim 2, characterized in that: The slurry outlet (7) is arranged in four sets at intervals along the circumference of the main drill rod (4), and the slurry outlet (7) is located between the first stirring blades (8) arranged at intervals.

4. The bidirectional mixing device for cement-soil mixing piles according to claim 3, characterized in that: Both the first stirring blade (8) and the second stirring blade (9) are arc-shaped structures; the middle part of the first stirring blade (8) is concave to form a first arc groove (20); the middle part of the second stirring blade (9) is concave to form a second arc groove (21).

5. The bidirectional mixing device for cement-soil mixing piles according to claim 4, characterized in that: The first transmission component (10) includes a first transmission gear (1001) disposed on the outer wall of the main drill rod (4); the second transmission component (11) includes a first transmission gear ring (1101) disposed on the inner wall of the auxiliary drill sleeve (5); the third transmission includes a second transmission gear (1201) rotatably connected to the connecting sleeve (2); the second transmission gear (1201) meshes with the first transmission gear (1001) and the second transmission gear ring respectively.

6. The bidirectional mixing device for cement-soil mixing piles according to claim 5, characterized in that: The bottom end of the main drill rod (4) is also provided with a transverse stirring blade (23).

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