Multi-shaft stirring device of stirring pile

Abstract

The utility model discloses a multi-shaft stirring device of a stirring pile, which comprises a plurality of drill rods driven by a power head and arranged in parallel, the lower end of each drill rod is provided with a stirring drill bit, and the stirring drill bit comprises a drill bit and stirring blades; the plurality of stirring blades are uniformly distributed along the circumferences of the drill rods, and the rotating directions of the stirring blades on the two adjacent drill rods are opposite; the distance between every two adjacent drill rods is smaller than the sum of the widths of the two stirring blades on the opposite sides extending out of the drill rods, and the angles of the stirring blades on the opposite sides of every two adjacent drill rods are staggered. The stirring blades on the opposite sides of the two adjacent drill rods of the two stirring blades are staggered by an included angle of 90 degrees, and the three stirring blades are staggered by an included angle of 60 degrees. The multi-shaft stirring device can be used for stirring to a preset depth at one time, and the opposite stirring blades of the two adjacent drill rods are mutually meshed and mutually stirred and do not interfere with each other, so that the overall quality of an underground structure formed by construction is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of foundation construction equipment technology, specifically a multi-axis mixing device for mixing piles. Background Technology

[0002] High-pressure jet grouting piles and cement-soil mixing piles are collectively referred to as mixing piles. The construction equipment for mixing piles is relatively mature. During the construction process, the hoisting equipment drives the drill rod to rotate while drilling down through the mixing drill bit and stirring the soil. At the same time, cement slurry is sprayed out through the grouting pipe inside the drill rod and the nozzle on the mixing drill bit. After the cement slurry solidifies, it becomes a mixing pile.

[0003] It's easy to understand that the number of shafts is the same as the number of drill pipes. The number of drill pipes determines the number of shafts. For example, one drill pipe is called a single shaft, two drill pipes are called a double shaft, and three drill pipes are called a triple shaft, etc.

[0004] Early drill pipes were single-axis, later evolving into two-axis and three-axis systems with the centers of the drill pipes aligned on a straight line. Initially, each drill pipe could only rotate in one direction. Later, each drill pipe consisted of an inner and outer rod, which rotated relative to each other, i.e., bidirectional rotation. Since the drive gears of adjacent drill pipes meshed, the outer rods of adjacent drill pipes rotated in opposite directions. In other words, there are existing literature documents describing three-axis stirring devices where the inner and outer rods drive the inner and outer blades of the lower stirring drill bit to rotate relative to each other, i.e., bidirectional rotation.

[0005] The aforementioned triaxial mixing device, in which the inner and outer rods drive the inner and outer blades of the lower mixing drill bit to rotate relative to each other (i.e., bidirectional rotation), generates three cement mixing piles at once, resulting in relatively high construction efficiency. Since each cement mixing pile is generated by the reverse rotation of the inner and outer blades, its single bearing capacity is significantly improved.

[0006] However, the existing multi-axis mixing devices for biaxial or triaxial cement-soil mixing piles, to avoid interference and damage caused by the opposite rotation of adjacent outer blades, leave a rotation gap between the outer blades of the two axes. For triaxial devices, a rotation gap is left between the outer blades of the two mixing drill bits at the same height, while the horizontal height of the middle mixing drill bit is higher than the other two at the same height. The disadvantages are: for triaxial mixing devices, since the three mixing drill bits are not at the same horizontal height, during actual pile formation, mixing an extra section wastes materials and energy, while mixing an insufficient section results in insufficient depth to meet basic construction requirements. Especially for each individual cement mixing pile, because the inner and outer blades rotate in opposite directions, the bearing capacity of a single pile is significantly improved. However, for two or three cement mixing piles together, because there is no interlocking mixing process, the overall quality of the resulting underground structure, such as the bearing capacity, integrity, strength, and stability of the diaphragm wall, needs improvement. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a multi-axis mixing device for mixing piles that can mix to a predetermined depth in one go, and whose opposing mixing blades of two adjacent drill rods can both bite and mix with each other without interfering with each other, so as to significantly improve the overall quality of the underground structure formed by construction.

[0008] The technical solution of this utility model is to provide a multi-axis mixing device for mixing piles, including multiple drill rods driven by a power head and arranged in parallel. Each drill rod has a mixing drill bit installed at its lower end. The mixing drill bit includes a drill bit and mixing blades. There are multiple mixing blades, which are evenly distributed along the circumference of the drill rod. The mixing blades on adjacent drill rods rotate in opposite directions. The distance between two adjacent drill rods is less than the sum of the widths of the two mixing blades on the opposite sides extending outward from the drill rod, and the angles of the mixing blades on the opposite sides of the two adjacent drill rods are staggered.

[0009] With the above structure, the multi-axis mixing device for mixing piles of this utility model has the following advantages: It is easy to understand that the staggered angles are based on the principle that the opposing mixing blades of two adjacent drill rods both bite and mix with each other without interfering with each other. In this way, the multiple mixing blades on multiple drill rods can be approximately at the same height or, as described below, all on the same horizontal plane. This prevents the phenomenon of wasting materials and energy by mixing an excessive section, or failing to meet construction requirements due to insufficient mixing. It allows drilling and mixing to the predetermined depth in one go, thus relatively saving materials and energy while meeting the basic requirements for construction depth. In particular, the spacing between two adjacent drill pipes is less than the sum of the widths of the two opposing mixing blades extending outward from the drill pipe, and the angles of the opposing mixing blades on the two adjacent drill pipes are staggered. This allows the opposing mixing blades of the two adjacent drill pipes to both bite and stir each other without interfering with each other. Because the adjacent mixing blades on the two adjacent shafts have a mutual biting and stirring process during construction, the overall quality of the underground structures formed by the construction, such as the load-bearing capacity, integrity, strength, and stability of the diaphragm wall, is greatly improved.

[0010] Furthermore, the angles of the opposing mixing blades on the two adjacent drill rods are staggered as follows: for each drill rod, the 0° line is the extended radius line drawn from the center when viewed from below. On the opposing sides of two adjacent drill rods, the angle between the thickness bisector of one mixing blade and its own 0° line is 0°, while the angle between the thickness bisector of the other mixing blade and its own 0° line is 20°-160°. With this specific structure, the commonly used two-blade mixing blades, or two-piece mixing blades, allow the opposing two-piece mixing blades on adjacent drill rods to interlock and mix without interfering with each other. The interlocking and mixing process of adjacent two-piece mixing blades on adjacent shafts during construction is significant, greatly improving the overall quality of the underground structure formed, such as the load-bearing capacity, integrity, strength, and stability of diaphragm walls.

[0011] Furthermore, the angles of the opposing mixing blades on the two adjacent drill rods are staggered as follows: for each drill rod, the 0° line is the extended radius line drawn from the center when viewed from below. On the opposing sides of two adjacent drill rods, the angle between the thickness bisector of one mixing blade and its own 0° line is 0°, and the angle between the thickness bisector of the other mixing blade and its own 0° line is 90°. Using this optimal staggered angle, the opposing mixing blades on adjacent drill rods interlock and stir without interfering with each other. The interlocking and stirring process of adjacent mixing blades on adjacent shafts during construction is more pronounced, significantly improving the overall quality of the underground structure formed, such as the load-bearing capacity, integrity, strength, and stability of diaphragm walls.

[0012] Furthermore, the angles of the opposing mixing blades on the two adjacent drill rods with three mixing blades are staggered as follows: for each drill rod, the 0° line is the extended radius line drawn from the center when viewed from below. Of the two opposing mixing blades on the two adjacent drill rods, the angle between the thickness bisector of one mixing blade and its own 0° line is 0°, and the angle between the thickness bisector of the other mixing blade and its own 0° line is 20°-100°. With this specific structure, the commonly used three-blade mixing blades, or three-blade type mixing blades, allow the opposing three-blade mixing blades on two adjacent drill rods to interlock and mix without interfering with each other. The interlocking and mixing process of adjacent three-blade mixing blades on two adjacent shafts during construction is significant, greatly improving the overall quality of the underground structure formed, such as the load-bearing capacity, integrity, strength, and stability of the diaphragm wall.

[0013] Furthermore, the angles of the mixing blades on the opposing sides of adjacent drill rods with three mixing blades are staggered as follows: for each drill rod, the 0° line is the extended radius line drawn from the center of the circle when viewed from below. Of the two mixing blades on the opposing sides of adjacent drill rods, the angle between the thickness bisector of one mixing blade and its own 0° line is 0°, and the angle between the thickness bisector of the other mixing blade and its own 0° line is 60°. With this optimal staggered angle, the commonly used three-blade mixing blades (or three-blade type mixing blades) allow the opposing three-blade mixing blades on adjacent drill rods to interlock and mix without interfering with each other. The interlocking and mixing process of adjacent three-blade mixing blades on adjacent shafts during construction is more pronounced, significantly improving the overall quality of the underground structure formed, such as the load-bearing capacity, integrity, strength, and stability of diaphragm walls.

[0014] Furthermore, the bottom ends of the mixing drill bits at the lower ends of multiple drill rods are on the same horizontal plane. With the above structure, the technical effect of drilling and mixing multiple drill rods simultaneously to the predetermined depth is better, and the technical effect of the opposing mixing blades of two adjacent drill rods interlocking and mixing is better.

[0015] Furthermore, the stirring blades are two, three, four, five, or six blades evenly distributed along the circumference of the drill rod. This structure ensures both the effective stirring of the blades and a reasonable and suitable staggered angle between the opposing stirring blades of adjacent drill rods.

[0016] Furthermore, the drill rod consists of an inner drill rod and an outer drill rod; the mixing drill bit includes a drill bit fixed at the bottom of the inner drill rod, an inner mixing blade fixed at the lower end of the inner drill rod, and an outer mixing blade fixed at the lower end of the outer drill rod. The inner mixing blade consists of multiple first transverse mixing blades, and the outer mixing blade consists of a frame mixing blade. Multiple second transverse mixing blades are fixed to the inner sides of the two vertical plates of the frame mixing blade. The heights of the multiple first transverse mixing blades of the inner mixing blade and the heights of the multiple second transverse mixing blades of the outer mixing blade are staggered. The width of each first transverse mixing blade of the inner mixing blade extending outward from the inner drill rod is limited to prevent interference with the vertical plates of the frame mixing blades of the outer mixing blade at the lower end of the adjacent drill rod during rotation. With the above structure, the adjacent mixing blades on the two adjacent shafts will not interfere with each other. Furthermore, due to the mutual mixing of the inner and outer mixing blades of each drill rod itself, as well as the mutual mixing of the adjacent mixing blades on the two adjacent shafts during the construction process, it can not only ensure the good load-bearing capacity of a single mixing column, but also further and significantly improve the overall quality of the underground structure formed by the construction, such as the load-bearing capacity, integrity, strength and stability of the diaphragm wall.

[0017] Furthermore, each drill pipe is fitted with an outer tube, and the drill pipe is rotatably connected to the outer tube. The entire height of the outer tube has one or more outer tube retainers spaced at intervals along its height, each retainer securing multiple parallel outer tubes. Although each drill pipe is relatively long, such as 20-30 meters, and there are multiple drill pipes arranged in parallel, such as five, this structure effectively prevents drill pipe swaying, keeps the axes of multiple drill pipes parallel to each other, and ensures that each drill pipe remains vertical. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the multi-axis stirring device of this utility model.

[0019] Figure 2 yes Figure 1 A magnified structural diagram of A in the diagram.

[0020] Figure 3 yes Figure 1 A magnified structural diagram of B in the diagram.

[0021] Figure 4 yes Figure 3 A magnified schematic diagram of a stirring drill bit with two stirring blades.

[0022] Figure 5 This is a schematic diagram of the structure of the multi-axis stirring device of this utility model, which uses three stirring blades.

[0023] Figure 6 yes Figure 5 A magnified structural diagram of a three-blade stirring drill bit from a different angle.

[0024] Figure 7 This is a schematic diagram of the external drill rod drive gear set in an embodiment of the multi-axis stirring device of this utility model.

[0025] Figure 8 This is a schematic diagram of the internal drill rod drive gear set of an embodiment of the multi-axis stirring device of this utility model.

[0026] Figure 9 This is a schematic diagram of the structure of the multi-axis stirring device of this utility model, in which the two stirring blades are staggered by 90°.

[0027] Figure 10 This is a schematic diagram of the structure of the three stirring blades of the multi-axis stirring device of this utility model, which are staggered by 60°.

[0028] As shown in the figure:

[0029] 1. Power head; 11. Motor cover; 12. Motor; 13. Gearbox; 14. Reducer; 141. Upper output gear; 142. Lower output gear; 15. Outer drill rod drive gear set; 151. First outer drill rod drive gear; 152. Second outer drill rod drive gear; 153. Third outer drill rod drive gear; 154. Fourth outer drill rod drive gear; 155. Fifth outer drill rod drive gear; 16. Inner drill rod drive gear set; 161. First inner drill rod drive gear; 162. Second inner drill rod drive gear; 163. Third inner drill rod drive gear; 164. Fourth inner drill rod drive gear; 165. Fifth inner drill rod drive gear; 17. Transition gear;

[0030] 2. Drill pipe; 21. Inner drill pipe; 211. First inner drill pipe; 212. Second inner drill pipe; 213. Third inner drill pipe; 214. Fourth inner drill pipe; 215. Fifth inner drill pipe; 22. Outer drill pipe; 221. First outer drill pipe; 222. Second outer drill pipe; 223. Third outer drill pipe; 224. Fourth outer drill pipe; 225. Fifth outer drill pipe; 226. Zero-degree line;

[0031] 3. Mixing drill bit; 31. Slurry pipe; 32. Drill bit; 33. Mixing blade; 331. Inner mixing blade; 3311. First transverse mixing blade; 332. Outer mixing blade; 3321. Vertical plate; 3322. Second transverse mixing blade; 3323. Thickness bisector.

[0032] 4. Outer tube retainer; 41. Outer tube. Detailed Implementation

[0033] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions of specific embodiments are intended to aid in understanding this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various specific embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown.

[0035] The existing high-pressure jet grouting piles and cement-soil mixing piles are collectively referred to as mixing piles. The construction equipment for mixing piles is relatively mature. During the construction process, the power head 1 driven by the winch equipment drives the drill rod 2 to rotate and drill down through the mixing drill bit 3 while stirring the soil. At the same time, cement slurry is sprayed out through the grouting pipe in the drill rod 2 and the grouting pipe 31 on the mixing drill bit 3. After the cement slurry solidifies, it becomes a mixing pile.

[0036] Multi-axis bidirectional drive devices, such as the three-axis drive devices of the prior art and the five-axis drive devices of this utility model, are considered prior art. The power head 1, or drive transmission assembly, such as the drive power source and gear transmission mechanism, is an example of this technology. As shown in the figure, the centers of the five axes are on the same straight line. Each drill rod 2 has a rotary joint at its top for connecting the slurry delivery pipe inside the drill rod to the slurry input pipe on the ground. A motor cover 11 can be fixed to the top surface of the gearbox 13. One motor 12, or two motors as shown in the figure, is fixed to the gearbox 13 or the motor cover 11. Taking two motors 12 as an example: each motor 12 has a reducer 14 connected to its lower end. An output gear is fixed on the output shaft of the reducer 14. The gearbox 13 can be divided into two layers; the upper layer can have an outer drill rod drive gear set 15, and the lower layer can have an inner drill rod drive gear set 16. Each output shaft of each reducer 14 has an upper output gear 141 and a lower output gear 142.

[0037] See Figure 7 The two upper output gears 141 each mesh with the first outer drill rod drive gear 151 and the fifth outer drill rod drive gear 155 on either side. The first outer drill rod drive gear 151 meshes with the adjacent second outer rod drive gear 152, and the fifth outer drill rod drive gear 155 meshes with the adjacent fourth outer rod drive gear 154. Both the second outer rod drive gear 152 and the fourth outer rod drive gear 154 mesh with the third outer drill rod drive gear 153. The rotation of the motor 12 drives both upper output gears 141 to rotate counterclockwise, driving the first outer drill rod drive gear 151 and the first outer drill rod 221, the fifth outer drill rod drive gear 155 and the fifth outer drill rod 225 to rotate clockwise, then driving the second outer drill rod drive gear 152 and the second outer drill rod 222, the fourth outer drill rod drive gear 154 and the fourth outer drill rod 224 to rotate counterclockwise, and then driving the third outer drill rod drive gear 153 and the third outer drill rod 223 to rotate clockwise.

[0038] See Figure 8Both lower output gears 142 mesh with their respective transition gears 17. Each of the two transition gears 17 meshes with the first inner drill rod drive gear 161 and the fifth inner drill rod drive gear 165 on both sides. The first inner drill rod drive gear 161 meshes with the adjacent second inner rod drive gear 162, and the fifth inner drill rod drive gear 165 meshes with the adjacent fourth inner rod drive gear 164. Both the second inner rod drive gear 162 and the fourth inner rod drive gear 164 mesh with the third inner drill rod drive gear 163. The rotation of motor 12 drives the two lower output gears 142 to rotate counterclockwise, which in turn drives the two transition gears 17 to rotate clockwise. This, in turn, drives the first inner drill rod drive gear 161, the first inner drill rod 211, the fifth inner drill rod drive gear 165, and the fifth inner drill rod 215 to rotate counterclockwise. This, in turn, drives the second inner drill rod drive gear 162, the second inner drill rod 212, the fourth inner drill rod drive gear 164, and the fourth inner drill rod 214 to rotate clockwise. This, in turn, drives the third inner drill rod drive gear 163 and the third inner drill rod 213 to rotate counterclockwise.

[0039] The embodiment of the multi-axis mixing device for mixing piles of this utility model includes multiple drill rods 2 that are driven by a power head 1 and arranged in parallel. Each drill rod 2 has a mixing drill bit 3 installed at its lower end. The mixing drill bit 3 includes a drill bit 32 and a mixing blade 33.

[0040] The stirring blades 33 are multiple, evenly distributed along the circumference of the drill rod 2. The stirring blades 33 on adjacent drill rods 2 rotate in opposite directions; for example, if one stirring blade 33 rotates clockwise, the other will rotate counterclockwise. The distance between adjacent drill rods 2 is less than the sum of the widths of the two opposing stirring blades 33 extending outwards from the drill rod 2. For example, if each blade 33 extends 320 mm outwards from its respective drill rod, the sum of the widths of the two opposing stirring blades 33 extending outwards from their respective drill rods 2 is 640 mm, while the distance between adjacent drill rods is less than 640 mm. For instance, 500 mm can be used. It is easy to understand that the distance between adjacent drill rods refers to the closest distance between the outer circumferences of the two drill rods. If bidirectional inner and outer drill rods are used, the distance between adjacent drill rods refers to the distance between adjacent outer drill rods 22.

[0041] Each inner drill rod 21 drives its inner stirring blade 331 and drill bit 32 to rotate in one direction, while each outer drill rod 22 drives its outer stirring blade 332 to rotate in another direction, thus achieving self-stirring of the inner and outer stirring blades; at the same time, the outer stirring blades 332 of adjacent shafts interlock and stir with each other without interference.

[0042] Furthermore, the angles of the opposing stirring blades 33 on the opposite sides of two adjacent drill pipes 2 are staggered. The principle of this staggered angle is that the opposing stirring blades 33 on two adjacent drill pipes 2 both interlock and stir each other without interfering with each other. It is easy to understand that if one opposing stirring blade 33 rotates clockwise around its own drill pipe axis, the adjacent stirring blade 33 will rotate counterclockwise around its own drill pipe axis to form opposing sides.

[0043] The stirring blades 32 are preferably two or three blades evenly distributed along the circumference of the drill rod 2. Of course, they can also be four, five or six blades evenly distributed along the circumference of the drill rod.

[0044] The specific angle at which the stirring blades on the opposing sides of two adjacent drill rods 2 are staggered can be:

[0045] The angles of the agitator blades on the opposing sides of two adjacent drill rods can be staggered as follows: For each drill rod, the 0° line is defined by the extended radius of a line drawn from the center when viewed from below. Of the two agitator blades on the opposing sides of two adjacent drill rods, the angle between the thickness bisector of one blade and its own 0° line is 0°, while the angle between the thickness bisector of the other blade and its own 0° line is between 20° and 160°. The 0° line is also called the zero-degree line, and the same applies below.

[0046] See Figure 9 .

[0047] The preferred angle between the opposing agitator blades on the two adjacent drill rods is as follows: For each drill rod, with the 0° line defined by the extended radius of a line drawn from the center when viewed from below, the angle between the thickness bisector of one agitator blade and its own 0° line is 0°, and the angle between the thickness bisector of the other agitator blade and its own 0° line is 90°. (Analogy: A clock is used as an example.)

[0048] First outer drill rod 221 and second outer drill rod 222: When the first outer drill rod 221 rotates clockwise, the zero-degree line 226 of the first outer drill rod 221 is similar to the extension of the radius line passing through the center of the circle at 3 o'clock. When the thickness bisector 3323 of the opposite outer stirring blades 332 on the first outer drill rod 221 rotates to an angle of 0° with the zero-degree line 226, the second outer drill rod 222 rotates counterclockwise. The zero-degree line 226 of the second outer drill rod 222 is similar to the extension of the radius line passing through the center of the circle at 9 o'clock. When the thickness bisector 3323 of the opposite outer stirring blades 332 on the second outer drill rod 222 rotates to an angle of 90° with the zero-degree line 226, the second outer drill rod 222 rotates to an angle of 90° with the zero-degree line 226.

[0049] Second outer drill rod 222 and third outer drill rod 223: The second outer drill rod 222 rotates counterclockwise, and the zero-degree line 226 of the second outer drill rod 222 is similar to the extension of the radius line passing through the center of the circle at 12 o'clock. When the thickness bisector 3323 of the opposite outer stirring blades 332 on the second outer drill rod 222 rotates to an angle of 0° with the zero-degree line 226, the third outer drill rod 223 rotates clockwise, and the zero-degree line 226 of the third outer drill rod 223 is similar to the extension of the radius line passing through the center of the circle at 12 o'clock. The thickness bisector 3323 of the opposite outer stirring blades 332 on the third outer drill rod 223 rotates to an angle of 90° with the zero-degree line 226.

[0050] The third outer drill rod 223 and the fourth outer drill rod 224: When the third outer drill rod 223 rotates clockwise, the zero-degree line 226 of the third outer drill rod 223 is similar to the extension of the radius line passing through the center of the circle at 3 o'clock. When the thickness bisector 3323 of the opposite outer stirring blades 332 on the third outer drill rod 223 rotates to an angle of 0° with the zero-degree line 226, that is, zero degrees; When the fourth outer drill rod 224 rotates counterclockwise, the zero-degree line 226 of the fourth outer drill rod 224 is similar to the extension of the radius line passing through the center of the circle at 9 o'clock. When the thickness bisector 3323 of the opposite outer stirring blades 332 on the fourth outer drill rod 224 rotates to an angle of 90° with the zero-degree line 226, that is, ninety degrees.

[0051] Fourth outer drill rod 224 and fifth outer drill rod 225: The fourth outer drill rod 224 rotates counterclockwise, and the zero-degree line 226 of the fourth outer drill rod 224 is similar to the extension of the radius line passing through the center of the circle at 12 o'clock. When the thickness bisector 3323 of the opposite-facing outer stirring blades 332 on the fourth outer drill rod 224 rotates to an angle of 0° with the zero-degree line 226, the fifth outer drill rod 225 rotates clockwise, and the zero-degree line 226 of the fifth outer drill rod 225 is similar to the extension of the radius line passing through the center of the circle at 12 o'clock. The thickness bisector 3323 of the opposite-facing outer stirring blades 332 on the fifth outer drill rod 225 rotates to an angle of 90° with the zero-degree line 226.

[0052] The angles of the agitator blades on the opposing sides of two adjacent drill rods with three agitator blades can be staggered as follows: for each drill rod, take the extended radius line drawn from the center of the circle when viewed from below as the 0° line. Among the two agitator blades on the opposing sides of two adjacent drill rods, the angle between the thickness bisector of one agitator blade and its own 0° line is 0°, and the angle between the thickness bisector of the other agitator blade and its own 0° line is 20°-100°.

[0053] See Figure 10 .

[0054] The preferred angle between the opposing agitator blades on the two adjacent drill rods with three agitator blades is as follows: For each drill rod, the 0° line is defined by the extended radius of a line drawn from the center when viewed from below. Of the two opposing agitator blades on the two adjacent drill rods, the angle between the bisector of the thickness of one agitator blade and its own 0° line is 0°, and the angle between the bisector of the thickness of the other agitator blade and its own 0° line is 60°. An analogy with a clock is used to illustrate this.

[0055] First outer drill rod 221 and second outer drill rod 222: When the first outer drill rod 221 rotates clockwise, the zero-degree line 226 of the first outer drill rod 221 is similar to the extension of the radius line passing through the center of the circle at 12 o'clock. When the thickness bisector 3323 of the opposite outer stirring blades 332 on the first outer drill rod 221 rotates to an angle of 0° with the zero-degree line 226, the second outer drill rod 222 rotates counterclockwise. The zero-degree line 226 of the second outer drill rod 222 is similar to the extension of the radius line passing through the center of the circle at 12 o'clock. When the thickness bisector 3323 of the opposite outer stirring blades 332 on the second outer drill rod 222 rotates to an angle of 60° with the zero-degree line 226, the second outer drill rod 222 rotates to an angle of 60° with the zero-degree line 226.

[0056] Second outer drill rod 222 and third outer drill rod 223: The second outer drill rod 222 rotates counterclockwise, and the zero-degree line 226 of the second outer drill rod 222 is similar to the extension of the radius line passing through the center of the circle at 6 o'clock. When the thickness bisector 3323 of the opposite outer stirring blades 332 on the second outer drill rod 222 rotates to an angle of 0° with the zero-degree line 226, the third outer drill rod 223 rotates clockwise, and the zero-degree line 226 of the third outer drill rod 223 is similar to the extension of the radius line passing through the center of the circle at 6 o'clock. The thickness bisector 3323 of the opposite outer stirring blades 332 on the third outer drill rod 223 rotates to an angle of 60° with the zero-degree line 226.

[0057] The third outer drill rod 223 and the fourth outer drill rod 224: When the third outer drill rod 223 rotates clockwise, the zero-degree line 226 of the third outer drill rod 223 is similar to the extension of the radius line passing through the center of the circle at 12 o'clock. When the thickness bisector 3323 of the opposite-facing outer stirring blades 332 on the third outer drill rod 223 rotates to an angle of 0° with the zero-degree line 226, that is, zero degrees; When the fourth outer drill rod 224 rotates counterclockwise, the zero-degree line 226 of the fourth outer drill rod 224 is similar to the extension of the radius line passing through the center of the circle at 12 o'clock. When the thickness bisector 3323 of the opposite-facing outer stirring blades 332 on the fourth outer drill rod 224 rotates to an angle of 60° with the zero-degree line 226, that is, sixty degrees.

[0058] Fourth outer drill rod 224 and fifth outer drill rod 225: The fourth outer drill rod 224 rotates counterclockwise, and the zero-degree line 226 of the fourth outer drill rod 224 is similar to the extension of the radius line passing through the center of the circle at 6 o'clock. When the thickness bisector 3323 of the opposite outer stirring blades 332 on the fourth outer drill rod 224 rotates to an angle of 0° with the zero-degree line 226, i.e., zero degrees, the fifth outer drill rod 225 rotates clockwise, and the zero-degree line 226 of the fifth outer drill rod 225 is similar to the extension of the radius line passing through the center of the circle at 12 o'clock. The thickness bisector 3323 of the opposite outer stirring blades 332 on the fifth outer drill rod 225 rotates to an angle of 60° with the zero-degree line 226, i.e., sixty degrees.

[0059] The angles of the blades on the opposite sides of two adjacent drill rods with four stirring blades can be staggered as follows: for each drill rod, the 0° angle is taken as the extension of the radius of a circle drawn from the center when viewed from below. Among the two stirring blades on the opposite sides of two adjacent drill rods, the angle between the thickness bisector of one stirring blade and its own 0° line is 0°, and the angle between the thickness bisector of the other stirring blade and its own 0° line is 20°-70°.

[0060] The preferred arrangement of the blade angles on the opposing sides of two adjacent drill rods with four stirring blades is as follows: for each drill rod, the radius extension line drawn from the center of the circle when viewed from below is taken as 0°. Among the two stirring blades on the opposing sides of two adjacent drill rods, the angle between the thickness bisector of one stirring blade and its own 0° line is 0°, and the angle between the thickness bisector of the other stirring blade and its own 0° line is 45°.

[0061] The angles of the blades on the opposing sides of two adjacent drill rods with five stirring blades can be staggered as follows: for each drill rod, the radius extension line drawn from the center of the circle when viewed from below is taken as 0°. Among the two stirring blades on the opposing sides of two adjacent drill rods, the angle between the thickness bisector of one stirring blade and its own 0° line is 0°, and the angle between the thickness bisector of the other stirring blade and its own 0° line is 20°-52°.

[0062] The preferred arrangement of the blade angles on the opposing sides of two adjacent drill rods with five stirring blades is as follows: for each drill rod, the radius extension line drawn from the center of the circle when viewed from below is taken as 0°. Among the two stirring blades on the opposing sides of two adjacent drill rods, the angle between the thickness bisector of one stirring blade and its own 0° line is 0°, and the angle between the thickness bisector of the other stirring blade and its own 0° line is 36°.

[0063] The angles of the blades on the opposite sides of two adjacent drill rods with six stirring blades can be staggered as follows: for each drill rod, the radius extension line drawn from the center of the circle when viewed from below is taken as 0°. Among the two stirring blades on the opposite sides of two adjacent drill rods, the angle between the thickness bisector of one stirring blade and its own 0° line is 0°, and the angle between the thickness bisector of the other stirring blade and its own 0° line is 20°-40°.

[0064] The preferred arrangement of the blade angles on the opposing sides of two adjacent drill rods with six stirring blades is as follows: for each drill rod, the radius extension line drawn from the center of the circle when viewed from below is taken as 0°. Among the two stirring blades on the opposing sides of two adjacent drill rods, the angle between the thickness bisector of one stirring blade and its own 0° line is 0°, and the angle between the thickness bisector of the other stirring blade and its own 0° line is 30°.

[0065] It is preferable that the bottom ends of the stirring drill bits 3 at the lower ends of the multiple drill rods 2 are on the same horizontal plane. However, it is not difficult to understand that it is also permissible for the bottom ends of the stirring drill bits 3 not to be on the same horizontal line, such as a height difference of about 5 cm.

[0066] It is easy to understand that the stirring blade of a single drill pipe, or unidirectional drill pipe, refers to the stirring blade itself. If the inner drill pipe 21 and outer drill pipe 22, as well as the inner stirring blade 331 and outer stirring blade 332 described below, are used, then the stirring blades 33 with staggered angles mentioned above all refer to the outer stirring blade 332 described below.

[0067] The drill rod 2 can be an inner drill rod 21 and an outer drill rod 22. The stirring drill bit 3 includes a drill bit 32 fixed to the bottom end of the inner drill rod 21, an inner stirring blade 331 fixed to the lower end of the inner drill rod 21, and an outer stirring blade 332 fixed to the lower end of the outer drill rod 22. The inner stirring blade 331 consists of multiple first transverse stirring blades 3311, and the outer stirring blade 332 consists of frame stirring blades. Multiple second transverse stirring blades 3322 are fixed to the inner side of the two vertical plates 3321 of the frame stirring blades. The height of the multiple first transverse stirring blades 3311 of the inner stirring blade 331 is staggered with the height of the multiple second transverse stirring blades 3322 of the outer stirring blade 332. The width of each first transverse stirring blade 3311 of the inner stirring blade 331 extending outward from the inner drill rod 21 is limited to not interfering with the vertical plates 3321 of the frame stirring blades of the outer stirring blade 332 of the adjacent drill rod 2, such as the lower end of the outer drill rod 22, during rotation. The term "multiple" refers to two or more blades.

[0068] Each drill rod 2 may be fitted with an outer tube 41, which may be polygonal, such as a chamfered quadrilateral. The drill rod 2, such as the outer drill rod 22, may be rotatably connected to the outer tube 41. The entire height of the outer tube 41 has one or more outer tube retainers 4 spaced along the height, and each outer tube retainer 4 fixes multiple parallel outer tubes 41.

[0069] The stirring blade 33 is also called an alloy blade. It is easy to understand that the structure, number, size and shape of the stirring blades 33 on all drill rods 2 in multiple drill rods 2 can be the same.

[0070] It's easy to understand that if an inner drill rod 21 and an outer drill rod 22 are used, along with inner stirring blades 331 and outer stirring blades 332, then the stirring blades 33 mentioned above are multiple. Multiple stirring blades 33 are evenly distributed along the circumference of the drill rod 2, meaning the number of inner and outer blades is equal. For example, there are two outer stirring blades 332 and two inner stirring blades 331. Multiple stirring blades 33 are evenly distributed along the circumference of the drill rod 2, such as two inner stirring blades 331 evenly distributed along the circumference of the inner drill rod 21, and two outer stirring blades 332 evenly distributed along the circumference of the outer drill rod 22. The stirring blades 33 on adjacent drill rods 2 rotate in opposite directions, meaning adjacent outer stirring blades 332 on adjacent outer drill rods 22 rotate in opposite directions. For example, if one outer stirring blade 332 rotates clockwise, the other outer stirring blade 332 rotates counterclockwise. The distance between two adjacent drill rods 2 is less than the sum of the widths of the two opposing stirring blades 33 extending outward from the drill rod 2. This means that the distance between two adjacent outer drill rods 22 is less than the sum of the widths of the two opposing outer stirring blades 332 extending outward from the outer drill rod 22. The angles of the opposing stirring blades 33 on the opposing sides of two adjacent drill rods 2 are staggered. This means that the angles of the opposing outer stirring blades 332 on the opposing sides of two adjacent outer drill rods 22 are staggered.

[0071] It is easy to understand that, due to the failure to solve the problem of multiple stirring blades interlocking and stirring at the same height without interfering with each other, the existing multi-axis bidirectional stirring devices are currently limited to three-axis bidirectional stirring devices, and the middle stirring blade must be located above the two stirring blades below. However, this invention has solved the problem of multiple stirring blades interlocking and stirring at the same height without interfering with each other. Therefore, the multi-axis can be two-axis, three-axis, four-axis, five-axis, six-axis, seven-axis, eight-axis, etc. The number of axes refers to the number of drill rods 2. The number of drill rods 2 determines the number of axes. For example, one drill rod 2 is called a single axis, two drill rods 2 are called a double axis, three drill rods 2 are called a three-axis, four drill rods 2 are called a four-axis, five drill rods 2 are called a five-axis, six drill rods 2 are called a six-axis, seven drill rods 2 are called a seven-axis, eight drill rods 2 are called an eight-axis, etc. The figure shows a specific embodiment of the five-axis design.

[0072] Components, structures, or quantities not marked above are not shown in the drawings, and some components are not marked in the drawings. The drawings are for illustrative purposes only. In case of any discrepancies between the drawings and the text descriptions, or between the drawings themselves, the text descriptions shall prevail.

[0073] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-axis mixing device for a mixing pile, comprising multiple drill rods driven by a power head and arranged in parallel, each drill rod having a mixing drill bit mounted at its lower end, the mixing drill bit comprising a drill bit and mixing blades; characterized in that: The stirring blades are multiple and evenly distributed along the circumference of the drill rod. The stirring blades on adjacent drill rods rotate in opposite directions. The distance between two adjacent drill rods is less than the sum of the widths of the two stirring blades on the opposite sides extending outward from the drill rod, and the angles of the stirring blades on the opposite sides of the two adjacent drill rods are staggered.

2. The multi-axis mixing device for mixing piles according to claim 1, characterized in that: The angles of the agitator blades on the opposing sides of two adjacent drill rods are staggered as follows: for each drill rod, the 0° line is the extended radius line drawn from the center of the circle when viewed from below. Among the two agitator blades on the opposing sides of two adjacent drill rods, the angle between the thickness bisector of one agitator blade and its own 0° line is 0°, and the angle between the thickness bisector of the other agitator blade and its own 0° line is 20°-160°.

3. The multi-axis mixing device for mixing piles according to claim 2, characterized in that: The angles of the agitator blades on the opposing sides of two adjacent drill rods are staggered as follows: for each drill rod, the 0° line is the extended radius line drawn from the center of the circle when viewed from below. Among the two agitator blades on the opposing sides of two adjacent drill rods, the angle between the thickness bisector of one agitator blade and its own 0° line is 0°, and the angle between the thickness bisector of the other agitator blade and its own 0° line is 90°.

4. The multi-axis mixing device for mixing piles according to claim 1, characterized in that: The angles of the agitator blades on the opposing sides of two adjacent drill rods are staggered as follows: for each drill rod, the 0° line is the extended radius line drawn from the center of the circle when viewed from below. Among the two agitator blades on the opposing sides of two adjacent drill rods, the angle between the thickness bisector of one agitator blade and its own 0° line is 0°, and the angle between the thickness bisector of the other agitator blade and its own 0° line is 20°-100°.

5. The multi-axis mixing device for mixing piles according to claim 4, characterized in that: The angles of the agitator blades on the opposing sides of two adjacent drill rods are staggered as follows: for each drill rod, the 0° line is the extended radius line drawn from the center of the circle when viewed from below. Among the two agitator blades on the opposing sides of two adjacent drill rods, the angle between the thickness bisector of one agitator blade and its own 0° line is 0°, and the angle between the thickness bisector of the other agitator blade and its own 0° line is 60°.

6. The multi-axis mixing device for mixing piles according to claim 1, characterized in that: The bottom ends of the mixing drill bits at the lower ends of multiple drill rods are on the same horizontal plane.

7. The multi-axis mixing device for mixing piles according to claim 1, characterized in that: The stirring blades are two, three, four, five, or six blades evenly distributed along the circumference of the drill rod.

8. The multi-axis mixing device for mixing piles according to claim 1, characterized in that: The drill rod consists of an inner drill rod and an outer drill rod; the mixing drill bit includes a drill bit fixed at the bottom of the inner drill rod, an inner mixing blade fixed at the lower end of the inner drill rod, and an outer mixing blade fixed at the lower end of the outer drill rod. The inner mixing blade consists of multiple first transverse mixing blades, and the outer mixing blade consists of a frame mixing blade. Multiple second transverse mixing blades are fixed to the inner sides of the two vertical plates of the frame mixing blade. The heights of the multiple first transverse mixing blades of the inner mixing blade and the heights of the multiple second transverse mixing blades of the outer mixing blade are staggered. The width of each first transverse mixing blade of the inner mixing blade extending outward from the inner drill rod is limited to prevent interference with the vertical plates of the frame mixing blades of the outer mixing blade at the lower end of the adjacent drill rod during rotation.

9. The multi-axis mixing device for mixing piles according to claim 1, characterized in that: Each drill pipe is fitted with an outer tube, and the drill pipe is rotatably connected to the outer tube. There is one or more outer tube retainers along the entire height of the outer tube, and each outer tube retainer fixes multiple parallel outer tubes.

Images