Bidirectional mutual stirring mixing pile drilling tool
By using the reverse rotation design of the inner and outer blades of the bidirectional mixing pile drill bit, the problems of uneven mixing and low efficiency of traditional mixing drill bits are solved, and uniform mixing of soil and cement slurry and efficient construction are achieved.
Patent Information
- Application Number
- CN202520317277.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-03-17
- Estimated Expiration
- 2035-02-26
AI Technical Summary
Traditional mixing drills have poor mixing effects, resulting in uneven mixing, low construction efficiency, and difficulty in adapting to various geological conditions.
The bidirectional mixing pile drilling tool is adopted. The inner and outer mixing frames rotate in opposite directions and the inner and outer blades are set in an alternating manner to achieve bidirectional forced mixing. Cement slurry is sprayed synchronously in combination with the jetting component.
It achieves uniform mixing of soil and cement slurry, improves construction efficiency, has strong adaptability, and is suitable for various geological conditions.
Smart Images
Figure CN224001920U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of soft foundation reinforcement equipment, and in particular to a bidirectional mixing pile drilling tool. Background Technology
[0002] In geotechnical engineering construction, especially in the treatment of soft soil foundations, it is often necessary to use mixing drills to thoroughly mix the solidifying agent with the soil to form cement-soil piles with certain strength and stability, thereby improving the bearing capacity of the foundation. Traditional mixing drills have several problems, such as: uneven mixing: With unidirectional mixing drills, the mixing degree between the soil and the solidifying agent is limited during the mixing process, easily leading to insufficient mixing in certain areas, resulting in uneven pile strength and affecting the foundation treatment effect; low construction efficiency: Existing mixing drills have slow mixing speeds and require multiple repetitions to achieve a certain mixing effect, consuming a lot of time and labor costs; poor adaptability: For different geological conditions, such as hard soil layers and sandy soil layers, traditional mixing drills are difficult to drill and mix effectively, failing to meet diverse construction needs. Previously, traditional tools were welded to the drill rod, making installation and disassembly very cumbersome and affecting efficiency. Utility Model Content
[0003] (a) Technical problems to be solved
[0004] The problem to be solved by this utility model is to provide a bidirectional mixing pile drilling tool to overcome the defect of poor mixing effect of existing mixing drilling tools, which makes them unsuitable for various construction environments.
[0005] (II) Technical Solution
[0006] To solve the aforementioned technical problem, this utility model provides a bidirectional mixing pile drilling tool, including a drill rod assembly, a mixing blade assembly, and a jetting assembly. The drill rod assembly includes an inner drill rod and an outer drill rod arranged concentrically and connected to an external power drive system for relative rotation. The drill rod assembly includes an outer mixing frame and an inner mixing frame that are nested together. The outer mixing frame is fixedly connected to the outer drill rod, and the inner mixing frame is fixedly connected to the inner drill rod. The outer mixing frame and the inner mixing frame are respectively provided with outer and inner mixing blades, which are arranged at intervals. The external power drive system can drive the outer mixing frame and the inner mixing frame to rotate in opposite directions, thereby achieving bidirectional mixing.
[0007] In some embodiments, the outer stirring frame includes an upper support and a lower support, and an upper bushing and a lower bushing are respectively provided on the upper support and the lower support. The upper end of the outer stirring frame is movably assembled to the upper end of the inner stirring frame through the upper bushing of the upper support, and the lower end of the outer stirring frame is movably assembled to the lower end of the inner stirring frame through the lower bushing of the lower support.
[0008] In some embodiments, the upper support and the lower support have the same structure. The upper support and the lower support are provided with a first connecting part at equal intervals in an annular shape. The outer stirring frame includes a plurality of blades. The upper and lower ends of the blades are provided with a second connecting part. The second connecting part is respectively assembled on the first connecting part. The blade is arc-shaped and the outer blade extends inward from the center.
[0009] In some embodiments, the inner stirring frame is provided with a plurality of inner blades at equal intervals at the top and bottom, the inner blades and the outer blades are staggered, a stirring chamber is formed between the inner stirring frame and the outer stirring frame, and the inner blades and the outer blades divide the height of the stirring chamber equally.
[0010] In some embodiments, the spraying assembly includes a slurry channel inside an inner mixing frame and a main blade integrally formed at the bottom. The main blade is provided with a plurality of stirring teeth, and one or more spray nozzles communicating with the slurry channel are provided between the main blade and the inner blade of the inner mixing frame.
[0011] In some embodiments, the top of the inner stirring frame is connected to the inner drill rod via a first flange, and the outer stirring frame is connected to the outer drill rod via a second flange on the upper support.
[0012] (III) Beneficial Effects
[0013] This utility model provides a bidirectional mixing pile drilling tool, which has multiple inner and outer blades evenly spaced on the outer and inner sides of the inner and outer mixing frames. The inner and outer mixing frames are connected by an external power drive system, which drives them to rotate in opposite directions, thus achieving bidirectional forced mixing. This ensures that the soil and cement slurry are mixed evenly and without dead corners. The inner and outer blades are staggered and specially designed in shape and angle, which can forcefully mix and shear the soil during rotation. The outer mixing frame is designed with three sets of blades to prevent the cement slurry from flowing out, ensuring that all slurry is fully mixed within the mixing aperture. The cement slurry is also evenly sprayed out through the injection hole and mixed with the soil simultaneously during the mixing process, improving the mixing efficiency. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a front view of a bidirectional mixing pile drilling tool according to the present invention;
[0016] Figure 2This is a top view of a bidirectional mixing pile drilling tool according to the present invention;
[0017] Figure 3 This is a top view of the upper support of a bidirectional mixing pile drilling tool according to the present invention;
[0018] Figure 4 This is a front view of the blade of a bidirectional mixing pile drilling tool according to the present invention.
[0019] The component names corresponding to the various reference numerals in the figure are as follows: 1. Inner stirring frame; 2. Outer blade; 3. Inner blade; 4. Upper support; 5. Lower support; 6. Upper bushing; 7. Lower bushing; 8. First connecting part; 9. Blade; 10. Second connecting part; 11. Stirring chamber; 12. Slurry channel; 13. Main blade; 14. Stirring teeth; 15. First flange; 16. Second flange. Detailed Implementation
[0020] The embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0021] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0022] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.
[0023] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0024] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.
[0025] See Figures 1-4 This utility model provides a bidirectional mixing pile drilling tool, including a drill rod assembly, a mixing blade assembly, and a jetting assembly. The drill rod assembly includes an inner drill rod and an outer drill rod arranged concentrically and connected to an external power drive system to drive relative rotation. The drill rod assembly includes an outer mixing frame and an inner mixing frame 1 that are nested together. The outer mixing frame is fixedly connected to the outer drill rod, and the inner mixing frame 1 is fixedly connected to the inner drill rod. The outer mixing frame and the inner mixing frame 1 are respectively provided with outer mixing blades 2 and inner mixing blades 3, which are arranged at intervals. The external power drive system can drive the outer mixing frame and the inner mixing frame 1 to rotate in opposite directions, thereby achieving bidirectional mixing. Specifically... The outer stirring frame includes an upper support 4 and a lower support 5. The upper support 4 and the lower support 5 are respectively provided with an upper bushing 6 and a lower bushing 7. The upper end of the outer stirring frame is movably assembled to the upper end of the inner stirring frame 1 through the upper bushing 6 of the upper support 4, and the lower end of the outer stirring frame is movably assembled to the lower end of the inner stirring frame 1 through the lower bushing 7 of the lower support 5. The upper support 4 and the lower support 5 have the same structure. The upper support 4 and the lower support 5 are provided with three first connecting parts 8 at equal intervals in a ring. The outer stirring frame includes multiple blades 9. The upper and lower ends of the blades 9 are provided with second connecting parts 10. The second connecting parts 10 are respectively assembled to the first connecting parts 8 by positioning bolts.
[0026] In some embodiments, such as Figure 1 and Figure 2As shown, the blade 9 is arc-shaped with an outer blade 2 extending inward from its center. Multiple inner blades 3 are evenly spaced in a ring on both the upper and lower parts of the inner mixing frame 1. The inner blades 3 and outer blades 2 are staggered, forming a mixing chamber 11 between the inner and outer mixing frames. The inner blades 3 and outer blades 2 divide the height of the mixing chamber 11 into four equal parts. Therefore, when the outer blades 2 and inner blades 3 rotate, they can evenly mix the soil in the mixing chamber, improving mixing efficiency. The top of the inner mixing frame 1 is connected to the inner drill rod via a first flange 15, and the outer mixing frame is connected to the outer drill rod via a second flange 16 on the upper support 4. The power drive system can... The inner mixing frame 1 and the upper bushing 6 are controlled to rotate in opposite directions via the first flange 15 and the second flange 16, respectively. This causes the outer mixing frame to rotate in the opposite direction to the inner mixing frame 1. At this time, the inner blade 3 and the outer blade 2 rotate in opposite directions, ensuring uniform mixing of the soil and cement slurry with no dead corners. In this embodiment, the inner and outer mixing blades are staggered, and the shape and angle of the blades are specially designed to forcefully mix and shear the soil during rotation. The outer mixing frame is designed with three sets of blades, which acts as a frame shear to prevent the cement slurry from flowing out, ensuring that all slurry is fully mixed within the mixing aperture. The inner blades can be installed and welded in three sets of two layers at different angles, increasing the interlocking mixing of the inner walls of the three sets of blades and enhancing the mixing effect on the soil inside the inner wall.
[0027] In some embodiments, such as Figure 1 As shown, the spraying assembly includes a slurry channel 12 inside the inner mixing frame 1 and a main blade 13 welded to the bottom. The upper and lower ends of the main blade 13 are provided with multiple stirring teeth 14 at equal intervals. One or more spraying nozzles that communicate with the slurry channel 12 are provided between the main blade 13 and the inner blade 3 of the inner mixing frame 1. Cement slurry is sprayed out evenly through the spraying nozzles and mixed with the soil simultaneously during the mixing process to improve the mixing efficiency.
[0028] This utility model provides a bidirectional mixing pile drilling tool, which has multiple inner and outer blades evenly spaced on the outer and inner sides of the inner and outer mixing frames. The inner and outer mixing frames are connected by an external power drive system, which drives them to rotate in opposite directions, thus achieving bidirectional forced mixing. This ensures that the soil and cement slurry are mixed evenly and without dead corners. The inner and outer blades are staggered and specially designed in shape and angle, which can forcefully mix and shear the soil during rotation. The outer mixing frame is designed with three sets of blades to prevent the cement slurry from flowing out, ensuring that all slurry is fully mixed within the mixing aperture. The cement slurry is also evenly sprayed out through the injection hole and mixed with the soil simultaneously during the mixing process, improving the mixing efficiency.
[0029] The above description of the heating water pipe is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A bidirectional intermixing pile drill tool, comprising a drill rod assembly, a mixing blade assembly and a jetting assembly, the drill rod assembly comprising an inner drill rod and an outer drill rod arranged concentrically and connected to an external power drive system to drive relative rotation, characterized in that: The drill pipe assembly comprises outer and inner stirring frames (1) which are sleeved with each other, the outer stirring frame is fixedly connected with the outer drill pipe, the inner stirring frame (1) is fixedly connected with the inner drill pipe, the outer and inner stirring frames (1) are respectively provided with stirring outer blades (2) and inner blades (3), and the outer blades (2) and the inner blades (3) are arranged at intervals; the outer power driving system can drive the outer and inner stirring frames (1) to rotate reversely, so that bidirectional stirring is realized.
2. The bi-directional intermixing auger drill of claim 1, wherein: The outer stirring frame comprises upper and lower supports (4) and (5), the upper and lower supports (4) and (5) are respectively provided with upper and lower shaft sleeves (6) and (7), the upper end of the outer stirring frame is movably assembled at the upper end of the inner stirring frame (1) through the upper shaft sleeve (6) of the upper support (4), and the lower end of the outer stirring frame is movably assembled at the lower end of the inner stirring frame (1) through the lower shaft sleeve (7) of the lower support (5).
3. A bi-directional intermixing auger drill as claimed in claim 2 wherein: The upper and lower supports (4) and (5) are the same in structure, the upper and lower supports (4) and (5) are annularly and equidistantly provided with first connecting parts (8), the outer stirring frame comprises a plurality of wings (9), the upper and lower ends of the wings (9) are provided with second connecting parts (10), and the second connecting parts (10) are respectively assembled on the first connecting parts (8).
4. A bi-directional intermixing auger drill as claimed in claim 3 wherein: The wings (9) are arc-shaped and inwardly extended at the centers to be provided with the outer blades (2).
5. The bi-directional intermixing auger drill of claim 1, wherein: The inner stirring frame (1) is equidistantly provided with a plurality of the inner blades (3) at the upper and lower ends, and the inner blades (3) are arranged in a staggered manner with the outer blades (2).
6. The bi-directional intermixing auger drill of claim 1, wherein: The inner stirring frame (1) and the outer stirring frame form a stirring bin (11) therebetween, and the inner blades (3) and the outer blades (2) equally divide the height of the stirring bin.
7. The bi-directional intermixing auger drill of claim 1, wherein: The spraying assembly comprises a slurry channel (12) in the inner stirring frame (1) and a main blade (13) which is formed by welding at the bottom.
8. A bi-directional intermixing auger drill as claimed in claim 7 wherein: A plurality of stirring teeth (14) are arranged on the main blade (13).
9. The bi-directional intermixing auger drill of claim 2, wherein: The top of the inner stirring frame (1) is connected with the inner drill pipe through a first flange (15), and the outer stirring frame is connected with the outer drill pipe through a second flange (16) on the upper support (4).
10. The bi-directional intermixing auger drill of claim 8, wherein: One or more spraying openings which penetrate the slurry channel (12) are arranged between the main blade (13) and the inner blade (3) of the inner stirring frame (1).