Stirring drill rod

Abstract

The utility model relates to a stirring drill rod which comprises a drill rod body, a plurality of pairs of stirring blades are arranged on the peripheral wall of the drill rod body and sequentially distributed in the axial direction of the drill rod body, the stirring blades comprise long-wing stirring blades and short-wing stirring blades, and the long-wing stirring blades and the short-wing stirring blades are distributed in a staggered mode in the axial direction of the drill rod body. The end parts of the long-wing stirring blades are provided with righting steel plates which play a role in forming hole perpendicularity, the plurality of pairs of stirring blades and the axial section of the drill rod are distributed in an inclined shape, and the inclined angles a are sequentially increased from the bottom to the top in the axial direction of the drill rod; according to the utility model, the perpendicularity is ensured in the hole forming process, and meanwhile, the uniformity of cement soil is improved, so that the defects in the prior art are overcome, and the high-quality stirring and pile planting construction can still be realized under the complicated geological condition.

Description

Technical Field

[0001] The utility model belongs to the technical field of pile construction, in particular to a stirring drill rod. Background Art

[0002] Mixing piles first use deep mixing machinery to cut and mix the soil, then inject cement slurry, and perform high-speed cutting and mixing according to the pre-set grouting volume and cutting and mixing times to form a fluidized cement soil pile. Then, prefabricated piles are implanted in the cement soil piles to form a composite pile foundation. Compared with the traditional bored pile process, mixing piles have low cost, no soil extraction, no mud discharge, and high construction efficiency. Compared with the traditional concrete prefabricated pile process, mixing piles do not produce soil squeezing effect and can pass through hard interlayers. It is a new type of pile foundation construction process with no pollution, low cost, high work efficiency, and good engineering quality. It is a pile foundation solution that has been widely promoted in recent years.

[0003] Due to the process characteristics of drilling holes before planting piles, high requirements are placed on the verticality of the holes and the uniformity of cement soil after drilling. Especially in the construction process of long piles, or in the case of complex strata with multiple interfaces between soft and hard soil layers, conventional mixer drill rods can no longer meet the strict requirements of the verticality of the holes, resulting in frequent problems in the later pile planting process. Therefore, there is an urgent need for a drill rod equipment that can ensure the verticality of the holes to solve the above technical problems and ensure the quality of pile foundation construction and engineering safety. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a mixing drill rod, which ensures its verticality during the hole-making process while improving the uniformity of cement soil, so as to overcome the deficiencies of the prior art and ensure that high-quality mixing pile construction can be achieved under complex geological conditions.

[0005] The purpose of the utility model is achieved through the following technical scheme. The stirring drill rod comprises a drill rod, and a plurality of pairs of stirring blades are arranged on the outer peripheral wall of the drill rod, and the plurality of pairs of stirring blades are distributed in sequence along the axial direction of the drill rod. The stirring blades comprise long-wing stirring blades and short-wing stirring blades, and the long-wing stirring blades and the short-wing stirring blades are staggered along the axial direction of the drill rod; a straightening steel plate is provided at the end of the long-wing stirring blade for achieving the verticality of the hole, and the plurality of pairs of stirring blades are distributed in an inclined shape with respect to the axial section of the drill rod, and the inclination angle a increases in sequence from the axial bottom to the top of the drill rod.

[0006] The beneficial effects of the utility model are as follows: compared with the prior art, by setting a variable-length blade design of different lengths, while ensuring the hole diameter, the stirring resistance is reduced, the energy consumption of the equipment is reduced, and the construction efficiency is improved; the long-wing stirring blades and the short-wing stirring blades are staggered along the axial direction of the drill rod. This variable-spacing blade design ensures that the cement soil cutting path is different each time, effectively avoiding repeated cutting paths, and the gradually variable inclination blade design makes the inclination angle of the blade and the drill rod section gradually change along the axial direction, fully disturbing the cement soil, significantly improving the mixing uniformity, and ensuring the stability of the pile foundation and the overall construction quality; a straightening steel plate is provided at the end of the long-wing stirring blade, and the drill rod has automatic straightening and deviation correction functions during the drilling process, further ensuring the verticality of the hole and reducing construction deviations.

[0007] Preferably, the outer diameter of the long-wing stirring blade is equal to the hole diameter, and the outer diameter of the short-wing stirring blade is smaller than the outer diameter of the long-wing stirring blade; in this way, the long-wing stirring blade can ensure the hole forming requirement during stirring, and the short-wing stirring blade is provided to reduce the stirring resistance and save equipment energy consumption.

[0008] Preferably, at least one pair of short-wing stirring blades is arranged between adjacent long-wing stirring blades; while ensuring the hole diameter, the stirring resistance is reduced, saving energy consumption of the equipment.

[0009] Preferably, at least two pairs of long-wing stirring blades are provided, and each pair of the long-wing stirring blades are symmetrically distributed along the center of the drill rod, and at least two pairs of short-wing stirring blades are provided, and each pair of the short-wing stirring blades are symmetrically distributed along the center of the drill rod; through the arrangement of the above structure, the stability and linearity of the blades in the drill hole are guaranteed.

[0010] Preferably, the straightening steel plate is arc-shaped, and the straightening steel plates on adjacent long-wing stirring blades, one pair of which is oriented perpendicular to the radial direction of the drill pipe, and the other pair of which is oriented horizontally to the radial direction of the drill pipe, and are alternately distributed along the axial direction of the drill pipe; through the arrangement of the above-mentioned structure, a casing is formed while cutting and rotating, so that it plays a role of straightening and correcting during the drilling process, thereby ensuring the verticality of the hole to a certain extent.

[0011] Preferably, a drill bit is installed at the bottom of the drill rod via a flange; the drill bit facilitates stirring and drilling of the drill rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the main structure of the stirring drill rod of the utility model.

[0013] Figure 2 yesFigure 1 Schematic enlarged structure diagram at position A.

[0014] The reference numerals in the accompanying drawings are respectively: 1, drill pipe; 2, stirring blades; 3, centering steel plates; 4, drill bit; 21, long-wing stirring blades; 22, short-wing stirring blades. Specific embodiments

[0015] The following will introduce the present utility model in detail with reference to the accompanying drawings: As shown in the accompanying drawings Figure 1 , 2 , the present utility model includes a drill pipe 1. A plurality of pairs of stirring blades 2 are provided on the outer peripheral wall of the drill pipe 1. The plurality of pairs of stirring blades 2 are sequentially distributed along the axial direction of the drill pipe 1. The stirring blades 2 include long-wing stirring blades 21 and short-wing stirring blades 22. The long-wing stirring blades 21 and the short-wing stirring blades 22 are staggeredly distributed along the axial direction of the drill pipe 1, and the spacing between the long-wing stirring blades 21 and the short-wing stirring blades 22 is unevenly distributed, ensuring that the cutting paths of the cement soil are different each time, effectively avoiding repeated cutting paths; A centering steel plate 3 for ensuring the verticality of the hole formation is provided at the end of the long-wing stirring blade 21. The plurality of pairs of stirring blades 2 are inclined with respect to the axial cross-section of the drill pipe 1, and the inclination angle a increases sequentially from the bottom to the top along the axial direction of the drill pipe 1.

[0016] The outer diameter of the long-wing stirring blade 21 is equal to the hole formation diameter, and the outer diameter of the short-wing stirring blade 22 is smaller than the outer diameter of the long-wing stirring blade 21.

[0017] At least one pair of short-wing stirring blades 22 are arranged between adjacent long-wing stirring blades 21.

[0018] At least two pairs of long-wing stirring blades 21 are provided, and each pair of long-wing stirring blades 21 is symmetrically distributed along the center of the drill pipe 1. At least two pairs of short-wing stirring blades 22 are provided, and each pair of short-wing stirring blades 22 is symmetrically distributed along the center of the drill pipe 1.

[0019] The centering steel plate 3 is arc-shaped, and for the centering steel plates 3 on adjacent long-wing stirring blades 21, the direction of the centering steel plate 3 on one pair of long-wing stirring blades 21 is perpendicular to the radial direction of the drill pipe 1, and the direction of the centering steel plate 3 on the other pair of long-wing stirring blades 21 is horizontal to the radial direction of the drill pipe 1, and they are alternately distributed along the axial direction of the drill pipe 1.

[0020] The bottom of the drill pipe 1 is installed with a drill bit 4 through a flange.

[0021] The utility model is provided with three pairs of long-wing stirring blades 21 and five pairs of short-wing stirring blades 22. The first pair of short-wing stirring blades 22 is arranged in sequence from the axial bottom to the top of the drill pipe 1. The third and fourth pairs of short-wing stirring blades 22 are located between the second and fifth pairs of long-wing stirring blades 21. The sixth and seventh pairs of short-wing stirring blades 22 are located between the fifth and eighth pairs of long-wing stirring blades 21. Moreover, the distances between adjacent stirring blades are all different, ensuring that the paths of cutting the cement soil are different each time, effectively avoiding repeated cutting paths.

[0022] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A stirring drill rod, comprising a drill rod (1), characterized in that: A plurality of pairs of stirring blades (2) are arranged on the outer peripheral wall of the drill rod (1), and the plurality of pairs of stirring blades (2) are sequentially distributed along the axial direction of the drill rod (1). The stirring blades (2) include long-wing stirring blades (21) and short-wing stirring blades (22), and the long-wing stirring blades (21) and the short-wing stirring blades (22) are staggeredly distributed along the axial direction of the drill rod (1); a straightening steel plate (3) is provided at the end of the long-wing stirring blade (21) for achieving the verticality of the hole, and the plurality of pairs of stirring blades (2) are distributed in an inclined shape with respect to the axial section of the drill rod (1), and the inclination angle a increases sequentially from the axial bottom to the top of the drill rod (1).

2. The stirring drill rod according to claim 1, characterized in that: The outer diameter of the long-wing stirring blade (21) is equal to the hole diameter, and the outer diameter of the short-wing stirring blade (22) is smaller than the outer diameter of the long-wing stirring blade (21).

3. The stirring drill rod according to claim 1, characterized in that: At least one pair of the short-wing stirring blades (22) is arranged between adjacent long-wing stirring blades (21).

4. The stirring drill rod according to claim 1, characterized in that: At least two pairs of the long-wing stirring blades (21) are provided, and each pair of the long-wing stirring blades (21) are symmetrically distributed along the center of the drill rod (1); at least two pairs of the short-wing stirring blades (22) are provided, and each pair of the short-wing stirring blades (22) are symmetrically distributed along the center of the drill rod (1).

5. The stirring drill rod according to claim 1, characterized in that: The straightening steel plate (3) is arc-shaped, and the straightening steel plates (3) on the adjacent long-wing stirring blades (21) are oriented perpendicular to the radial direction of the drill rod (1) on one pair of the long-wing stirring blades (21), and are oriented horizontally to the radial direction of the drill rod (1) on another pair of the long-wing stirring blades (21), and are alternately distributed along the axial direction of the drill rod (1).

6. The stirring drill rod according to claim 1, characterized in that: A drill bit (4) is mounted on the bottom of the drill rod (1) via a flange.

Images