CN217399620U

CN217399620U - External double-frame bidirectional stirring drilling tool

Info

Publication number: CN217399620U
Application number: CN202220276158.1U
Authority: CN
Inventors: 刘钟; 陈天雄; 兰伟; 杨宁晔; 张楚福
Original assignee: Zhejiang Kunde Innovate Geotechnical Engineering Co ltd
Current assignee: Zhejiang Kunde Innovate Geotechnical Engineering Co ltd
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2022-09-09
Anticipated expiration: 2032-02-11

Abstract

The utility model relates to an external double-frame bidirectional stirring drilling tool, which comprises a central shaft, an upper frame and a lower frame, wherein the central shaft is at least provided with two material conveying channels, and the central shaft sequentially comprises an outer pipe, an inner pipe and a central pipe from outside to inside; the upper frame is fixedly connected to the outer tube, the lower frame is fixedly connected to the inner tube, a shaft sleeve assembly is mounted on the inner tube, and the shaft sleeve assembly is respectively connected with the upper frame and the lower frame; the upper frame is positioned above the lower frame and is axially distributed along the central shaft; the upper frame is provided with a first stirring wing plate, the lower frame is provided with a second stirring wing plate, the outer peripheral side of the inner pipe and shaft sleeve assembly is provided with a third transverse stirring wing plate, and the first stirring wing plate and the second stirring wing plate are respectively arranged at intervals with the third transverse stirring wing plate; the utility model is suitable for a deep soil body in coastal area, and at the stirring in-process, have axial stirring degree of depth darker and stir more even, drilling speed is fast, advantage that the efficiency of construction is high.

Description

External double-frame bidirectional stirring drilling tool

Technical Field

The utility model belongs to the technical field of underground construction machinery equipment, especially, relate to an external two-way stirring drilling tool of double-frame.

Background

As a main construction method in the technical field of foundation treatment engineering, the technology of a deep mixing pile with unidirectional rotation mixing is applied to the field of engineering and construction in the last 60 th century, and comprises the fields of civil engineering, constructional engineering, railway engineering, highway engineering, hydraulic engineering, municipal engineering, port engineering and the like. The deep mixing pile engineering technology adopts a single-shaft or multi-shaft mixing drilling machine to input cement and other curing agents into the ground, and the curing agents and soft and hard soil bodies are mixed by stirring, so that a series of physical and chemical reactions are generated between the curing agents and the soil bodies, and pile bodies, wall bodies and block bodies with high strength, good water stability and strong seepage-proofing performance are generated. Therefore, the bearing capacity of the composite foundation, the bearing capacity of the mixing pile, the bearing capacity of the stiffening core composite pile, the bearing capacity of the pile in the SMW construction method, the impermeability of the waterproof wall, the actual engineering problems of the sealing wall and the sealing layer of the landfill site of polluted soil and toxic substances and the like are effectively solved.

The deep mixing pile engineering technology has the advantages of simple drilling machine equipment, high construction efficiency, low cost and the like, and is widely applied to the field of civil construction. However, when the drilling tool and the process for constructing the stirring pile by using the unidirectional rotation stirring are applied, serious engineering quality problems of uneven soil stirring, upward discharge of a curing agent along a gap between the drilling tool and the periphery of a drill rod, conglomeration and embracing of the drill in the construction of a viscous soil, lower integral strength of the cured soil than a design value and the like are often generated, and a serious engineering safety problem is often caused. Particularly, when a large-diameter and large-depth mixing pile is required to be adopted for construction in an engineering, and a single-power head, a unidirectional rotation mixing drilling tool and a technical construction are adopted, the engineering quality and the engineering safety risk are particularly highlighted, and even the phenomenon of sealing and killing use by an industrial administrative department and a local government occurs. Therefore, a double-power-head bidirectional stirring drilling tool is urgently needed to be developed, but some deep soil bodies in coastal areas are soft, and the existing bidirectional stirring drilling tool has the defects of uneven stirring, low construction efficiency and low drilling speed in the stirring process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a stirring, the high and fast two-way stirring drilling tool of external double-frame of rate of construction.

The utility model aims to solve the problems that the external double-frame bidirectional stirring drilling tool comprises a central shaft, an outer convex U-shaped upper frame and an outer convex U-shaped lower frame which are arranged on the outer peripheral side of the central shaft and are uniformly and radially separated, wherein the central shaft is at least provided with two material conveying channels and sequentially comprises an outer pipe, an inner pipe and a central pipe from outside to inside; the upper frame is fixedly connected to the outer tube, the lower frame is fixedly connected to the inner tube, a shaft sleeve assembly is mounted on the inner tube, and the shaft sleeve assembly is respectively connected with the upper frame and the lower frame; the upper frame is positioned above the lower frame and is axially distributed along the central shaft; the upper frame is provided with a first stirring wing plate, the lower frame is provided with a second stirring wing plate, the outer peripheral sides of the inner pipe and the shaft sleeve assembly are provided with a third transverse stirring wing plate, and the first stirring wing plate and the second stirring wing plate are respectively arranged at intervals with the third transverse stirring wing plate; the front guide drill bit is installed at the lower end of the central shaft, and the connecting assembly used for fixedly connecting the stirring drilling tool with the inner driving drill rod and the outer driving drill rod is installed at the upper end of the central shaft.

The utility model has the advantages that: by adopting the technical scheme, compared with the prior art, the deep soil body stirring device is suitable for deep soil bodies in coastal areas, and has the advantages of deeper axial stirring depth, more uniform stirring, high drilling speed and high construction efficiency in the stirring process.

Preferably, the shaft sleeve assembly comprises an annular limiting and supporting bearing long shaft sleeve and an annular limiting and supporting bearing short shaft sleeve, and the annular limiting and supporting bearing short shaft sleeve is fixed on the outer side wall of the annular limiting and supporting bearing long shaft sleeve; the upper end of the upper frame is fixedly connected with the outer side wall of the outer tube through a first fixed ring sleeve, the lower end of the upper frame is rotatably connected with the outer side wall of the inner tube through a long shaft sleeve of an annular limiting and supporting bearing, and the upper frame can rotate along with the outer tube; the upper end of the lower frame is rotatably connected with the outer side wall of the inner pipe through an annular limiting support bearing short shaft sleeve, the lower end of the lower frame is fixedly connected with the outer side wall of the inner pipe through a second fixing ring sleeve, and the lower frame can rotate along with the inner pipe; therefore, the upper frame and the lower frame do not influence each other when rotating and can rotate in the same direction or in the opposite direction independently.

Preferably, the central tube is provided with a first material transport channel, and the annular gap between the central tube and the inner tube forms a second material transport channel; the material conveying channel is convenient for conveying materials made of different materials to the deep soil body at the same time.

Preferably, a first injection port is arranged on the pipe wall of the lower end of the central pipe, and the first injection port is communicated with the first material conveying channel; the third transverse stirring wing plate is internally provided with a hollow pipe shape and a second injection port, is communicated with the second material conveying channel, is positioned in the upper frame and is provided with the second injection port, and the second injection port is positioned at the rear part of the third transverse stirring wing plate in the rotating direction; the material in the material conveying channel is conveniently injected into the deep soil body through the injection port.

Preferably, a plurality of second injection ports are sequentially arranged along the length direction of the third transverse stirring wing plate, and the plurality of second injection ports are densely distributed along the width direction of the frame from sparse to dense; after the stirring drill rotates for one circle, the coverage area swept by each injection port is equal.

Preferably, a pressure one-way valve tube is connected in the third transverse stirring wing plate through a return spring, one side of the pressure one-way valve tube is fixedly connected with one side of the third transverse stirring wing plate through the return spring, and the pressure one-way valve tube is provided with orifices which are in the same distribution form as the second injection orifices; the construction difficulty caused by the blockage of the second injection port can be solved, the waste of fixed materials is reduced, and the work of cleaning the slurry conveying pipe is avoided.

Preferably, the first stirring wing plate comprises a first transverse stirring wing plate and a first vertical stirring wing plate, and the second stirring wing plate comprises a second transverse stirring wing plate and a second vertical stirring wing plate; the first transverse stirring wing plate and a third transverse stirring wing plate positioned on the inner pipe are arranged at intervals along the axial direction of the central shaft, and the second transverse stirring wing plate and the third transverse stirring wing plate positioned on the shaft sleeve component are arranged at intervals along the axial direction of the central shaft; the first vertical stirring wing plates are vertically and downwardly arranged at the bottom of the lower end face of the upper frame, the second vertical stirring wing plates are vertically and upwardly arranged at the top of the upper end face of the lower frame, and the stirring wing plates on the upper end face and the lower end face are arranged at intervals along the width direction of the frame; the structure arrangement enables the soil body to realize the integral uniformity and high strength of the solidified soil through mutual shearing, kneading and crushing and strong stirring.

Preferably, the top of the upper end face of the upper frame is provided with an upper toothed plate which faces vertically upwards, and the bottom of the lower end face of the lower frame is provided with cutting teeth; the down-going or up-going construction of the stirring drilling tool is more convenient, and the construction efficiency is greatly improved.

Preferably, the vertical outer side walls of the upper frame and the lower frame are provided with wear-resistant material plates; the service life of the frame can be greatly prolonged.

Drawings

Fig. 1 is a schematic view of the external double-frame bidirectional stirring drilling tool of the present invention.

Fig. 2 is the structure schematic diagram of the flow direction of the external double-frame bidirectional stirring drilling tool curing agent of the utility model.

Fig. 3 is a schematic structural view of the two-product bidirectional stirring drilling tool of the present invention.

Fig. 4 is a schematic structural view of a three-product bidirectional stirring drilling tool of the present invention.

Fig. 5 is a schematic structural view of a four-product bidirectional stirring drilling tool of the present invention.

Fig. 6 is a schematic diagram of the pilot bit structure of the present invention.

Fig. 7 is a schematic view of the structure of the injection coverage area of the injection port of the present invention.

Fig. 8 is a schematic view of a second injector port arrangement according to the present invention.

Fig. 9 is a schematic view of the structure of the initial position of the pressure check valve tube of the present invention.

Fig. 10 is a structural schematic diagram of the working state of the pressure check valve pipe of the present invention.

The reference numbers in the drawings are respectively: 1. a central shaft; 2. an upper frame; 3. a lower frame; 4. a pilot bit; 5. a connecting assembly; 6. the bearing long shaft sleeve is supported in an annular limiting manner; 7. the bearing short shaft sleeve is supported in an annular limiting way; 8. a first fixed ring sleeve; 9. a second fixed ring sleeve; 10. a wear-resistant material plate; 11. an outer tube; 12. an inner tube; 13. a central tube; 14. a third transverse stirring wing plate; 15. a second material delivery channel; 16. a return spring; 17. a pressure check valve tube; 21. a first stirring wing plate; 31. a second stirring wing plate; 22. an upper toothed plate; 32. a cutting pick; 13-1, a first material transport path; 13-2, a first injection port; 14-1, a second injection port; 17-1, an orifice; 21-1, a first transverse stirring wing plate; 21-2, a first vertical stirring wing plate; 31-1, a second transverse stirring wing plate; 31-2 and a second vertical stirring wing plate.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings: as shown in the attached drawings 1 to 10, the utility model comprises a central shaft 1, and further comprises an outer convex U-shaped upper frame 2 and a lower frame 3 which are installed on the periphery side of the central shaft 1 and are equally divided in the radial direction, wherein the central shaft 1 is at least provided with two material conveying channels, and the central shaft 1 sequentially comprises an outer pipe 11, an inner pipe 12 and a central pipe 13 from outside to inside; the upper frame 2 is fixedly connected to the outer tube 11, the lower frame 3 is fixedly connected to the inner tube 12, a shaft sleeve assembly is mounted on the inner tube 12, and the shaft sleeve assembly is respectively connected with the upper frame 2 and the lower frame 3; the upper frame 2 is positioned above the lower frame 3 and is axially distributed along the central shaft 1; the upper frame 2 is provided with a first stirring wing plate 21, the lower frame 3 is provided with a second stirring wing plate 31, the outer peripheral sides of the inner pipe 12 and the shaft sleeve assembly are provided with a third transverse stirring wing plate 14, and the first stirring wing plate 21 and the second stirring wing plate 31 are respectively arranged at intervals with the third transverse stirring wing plate 14; the lower end of the central shaft 1 is provided with a pilot bit 4, and the upper end of the central shaft 1 is provided with a connecting component 5 for fixedly connecting the stirring drilling tool with the inner driving drill rod and the outer driving drill rod. For example: the outer pipe 11 rotates clockwise in the stirring construction process, so the first stirring wing plate 21 on the upper frame 2 also rotates clockwise, and meanwhile, the third transverse stirring wing plate 14 on the shaft sleeve assembly also rotates clockwise; the inner pipe 12 rotates counterclockwise in the stirring construction process, so the second stirring wing plate 31 on the lower frame 3 also rotates counterclockwise, and simultaneously the third transverse stirring wing plate 14 on the inner pipe 12 rotates counterclockwise; thereby realizing mutual shearing, kneading and crushing and strong stirring of the reinforced soil among the stirring wing plates.

The convex U-shaped upper frame 2 and the convex U-shaped lower frame 3 are evenly separated by 180 degrees, 120 degrees or 90 degrees and are radially provided with frames with two-product, three-product or four-product structures; as shown in figures 3 to 5.

The shaft sleeve assembly comprises an annular limiting support bearing long shaft sleeve 6 and an annular limiting support bearing short shaft sleeve 7, and the annular limiting support bearing short shaft sleeve 7 is rotatably connected to the outer side wall of the annular limiting support bearing long shaft sleeve 6; the upper end of the upper frame 2 is fixedly connected with the outer side wall of the outer tube 11 through a first fixing ring sleeve 8, the lower end of the upper frame 2 is rotatably connected with the outer side wall of the inner tube 12 through a long shaft sleeve 6 of an annular limiting support bearing, and the upper frame 2 can rotate along with the outer tube 11; the upper end of the lower frame 3 is rotatably connected with the outer side wall of the inner tube 12 through an annular limit support bearing short shaft sleeve 7, the lower end of the lower frame 3 is fixedly connected with the outer side wall of the inner tube 12 through a second fixing ring sleeve 9, and the lower frame can rotate along with the inner tube.

As shown in FIG. 2, the base pipe 13 is provided with a first material transport passage 13-1, and a gap between the base pipe 13 and the inner pipe 12 forms a second material transport passage 15; the material conveying channel can be used for conveying gas, water, slurry or powdery curing agent.

A first injection port 13-2 is arranged on the pipe wall at the lower end of the central pipe 13, and the first injection port 13-2 is communicated with the first material conveying channel 13-1; the third transverse stirring wing plate 14 is internally provided with a hollow pipe shape and is provided with a second injection port 14-1, the third transverse stirring wing plate 14 is communicated with a second material conveying channel 15, the third transverse stirring wing plate 14 with the second injection port 14-1 is positioned in the upper frame 2, and the second injection port 14-1 is positioned at the rear part of the third transverse stirring wing plate 14 in the rotating direction; as shown in fig. 8, a plurality of second injection ports 14-1 are sequentially arranged along the length direction of the third transverse stirring wing plate 14, and the plurality of second injection ports 14-1 are densely distributed from sparse to dense along the width direction of the frame; as shown in fig. 9 and 10, a pressure check valve tube 17 is connected to the inside of the third transverse stirring wing plate 14 through a return spring 16, one side of the pressure check valve tube 17 is fixedly connected to one side of the third transverse stirring wing plate 14 through the return spring 16, and an orifice 17-1 having the same distribution pattern as the second injection port 14-1 is formed in the pressure check valve tube 17.

The first stirring wing plate 21 comprises a first transverse stirring wing plate 21-1 and a first vertical stirring wing plate 21-2, and the second stirring wing plate 31 comprises a second transverse stirring wing plate 31-1 and a second vertical stirring wing plate 31-2; the first transverse stirring wing plate 21-1 and the third transverse stirring wing plate 14 positioned on the inner pipe 12 are arranged at intervals along the axial direction of the central shaft 1, and the second transverse stirring wing plate 31-1 and the third transverse stirring wing plate 14 positioned on the shaft sleeve component are arranged at intervals along the axial direction of the central shaft 1; the first vertical stirring wing plate 21-2 is vertically and downwardly arranged at the bottom of the lower end face of the upper frame 2, the second vertical stirring wing plate 31-2 is vertically and upwardly arranged at the top of the upper end face of the lower frame 3, and the stirring wing plates of the upper and lower end faces are arranged at intervals along the width direction of the frame.

The top of the upper end face of the upper frame 2 is provided with an upper toothed plate 22 which is vertically upward and plays a role in secondary stirring in the construction process of the drilling machine in the ascending stage; the cutting teeth 32 are arranged at the bottom of the lower end face of the lower frame 3, and play a role in stirring in the construction process of the descending stage of the drilling machine.

The vertical outer side walls of the upper frame 2 and the lower frame 3 are provided with wear-resistant material plates 10.

The utility model discloses a theory of operation does:

and (3) construction at a descending stage of the drilling machine: and (3) construction at a descending stage of the drilling machine: determining the pile position of the mixing pile, starting a drilling machine and a background slurry supply system after the drilling machine is in place, respectively applying clockwise and anticlockwise torques and vertical drilling pressure to the mixing drilling tool according to set construction parameters, performing drilling and stirring operations in a descending stage of the drilling machine, and simultaneously implementing quantitative spreading of a curing agent through the injection port by using a high-pressure grouting pump; because the rotating directions of the adjacent transverse stirring wing plates of the drilling tool are opposite, the reinforced soil body can be fully and integrally mixed uniformly by mutual shearing, kneading and crushing and strong stirring; and completing the construction in the downward drilling and stirring operation stage until the downward operation of the stirring drilling tool reaches the designed pile bottom elevation.

Construction in an ascending stage of the drilling machine: the drilling machine continuously applies clockwise and anticlockwise torque and lifting force to the stirring drilling tool according to the set construction parameters, and secondary stirring operation of the stirring pile in the ascending stage of the drilling machine is carried out; the secondary curing agent can be quantitatively spread by utilizing the spraying nozzle at the moment according to the construction requirement; in the secondary stirring operation stage, the drilling machine can improve the rotation speed and the lifting speed of the external double-frame bidirectional stirring drilling tool, and the soil body and the curing agent slurry are subjected to secondary sufficient mutual shearing and repeated stirring by utilizing the mutual reverse rotation of the stirring plates and the transverse stirring wing plates of the adjacent upper and lower frames until the ascending operation of the bidirectional stirring mechanism reaches the designed pile top elevation, so that the construction in the ascending stirring operation stage is completed; the construction operation of the mixing pile adopting the one-spraying two-stirring or two-spraying two-stirring construction process is completed at the stage.

The present invention is not limited to the above embodiments, and any change is made on the shape or material composition, and all the structural designs provided by the present invention are all the deformation of the present invention, which should be considered within the protection scope of the present invention.

Claims

1. The utility model provides an external two-way stirring drilling tool of two-frame, includes center pin (1), its characterized in that: the material conveying device is characterized by further comprising an outer convex U-shaped upper frame (2) and an outer convex U-shaped lower frame (3) which are arranged on the outer peripheral side of the central shaft (1) and are equally spaced in the radial direction, wherein the central shaft (1) is at least provided with two material conveying channels, and the central shaft (1) sequentially comprises an outer pipe (11), an inner pipe (12) and a central pipe (13) from outside to inside; the upper frame (2) is fixedly connected to the outer tube (11), the lower frame (3) is fixedly connected to the inner tube (12), a shaft sleeve assembly is mounted on the inner tube (12), and the shaft sleeve assembly is respectively connected with the upper frame (2) and the lower frame (3); the upper frame (2) is positioned above the lower frame (3) and is axially distributed along the central shaft (1); a first stirring wing plate (21) is arranged on the upper frame (2), a second stirring wing plate (31) is arranged on the lower frame (3), a third transverse stirring wing plate (14) is installed on the outer peripheral sides of the inner pipe (12) and the shaft sleeve assembly, and the first stirring wing plate (21) and the second stirring wing plate (31) are respectively arranged at intervals with the third transverse stirring wing plate (14); the drilling tool is characterized in that a front guide drill bit (4) is installed at the lower end of the central shaft (1), and a connecting assembly (5) used for fixedly connecting the stirring drilling tool with the inner driving drill rod and the outer driving drill rod is installed at the upper end of the central shaft (1).

2. The external double-frame bidirectional stirring drilling tool as set forth in claim 1, wherein: the shaft sleeve assembly comprises an annular limiting support bearing long shaft sleeve (6) and an annular limiting support bearing short shaft sleeve (7), and the annular limiting support bearing short shaft sleeve (7) is rotatably connected to the outer side wall of the annular limiting support bearing long shaft sleeve (6); the upper end of the upper frame (2) is fixedly connected with the outer side wall of the outer pipe (11) through a first fixing ring sleeve (8), the lower end of the upper frame (2) is rotatably connected with the outer side wall of the inner pipe (12) through an annular limiting support bearing long shaft sleeve (6), and the upper frame can rotate along with the outer pipe; the upper end of the lower frame (3) is rotatably connected with the outer side wall of the inner pipe (12) through an annular limiting supporting bearing short shaft sleeve (7), the lower end of the lower frame (3) is fixedly connected with the outer side wall of the inner pipe (12) through a second fixing ring sleeve (9), and the lower frame can rotate along with the inner pipe.

3. The external double-frame bidirectional stirring drilling tool as set forth in claim 1, wherein: the central tube (13) is provided with a first material conveying channel (13-1), and an annular gap between the central tube (13) and the inner tube (12) forms a second material conveying channel (15).

4. The external double-frame bidirectional stirring drilling tool as set forth in claim 3, wherein: a first spraying and injecting opening (13-2) is formed in the pipe wall of the lower end of the central pipe (13), and the first spraying and injecting opening (13-2) is communicated with the first material conveying channel (13-1); the third transverse stirring wing plate (14) is internally provided with a hollow tube shape and is provided with a second injection port (14-1), the third transverse stirring wing plate is communicated with the second material conveying channel (15), the third transverse stirring wing plate (14) with the second injection port (14-1) is positioned in the upper frame (2), and the second injection port (14-1) is positioned at the rear part of the third transverse stirring wing plate (14) in the rotating direction.

5. The external double-frame bidirectional stirring drilling tool as set forth in claim 4, wherein: the second injection ports (14-1) are sequentially arranged along the length direction of the third transverse stirring wing plate (14), and the second injection ports (14-1) are distributed from sparse to dense along the width direction of the frame.

6. The external double-frame bidirectional stirring drilling tool as set forth in claim 5, wherein: a pressure one-way valve pipe (17) is connected in the third transverse stirring wing plate (14) through a return spring (16), one side of the pressure one-way valve pipe (17) is fixedly connected with one side of the third transverse stirring wing plate (14) through the return spring (16), and an orifice (17-1) which is the same as the second injection port (14-1) in distribution form is formed in the pressure one-way valve pipe (17).

7. The external double-frame bidirectional stirring drilling tool as set forth in claim 1, wherein: the first stirring wing plate (21) comprises a first transverse stirring wing plate (21-1) and a first vertical stirring wing plate (21-2), and the second stirring wing plate (31) comprises a second transverse stirring wing plate (31-1) and a second vertical stirring wing plate (31-2); the first transverse stirring wing plate (21-1) and a third transverse stirring wing plate (14) positioned on the inner pipe (12) are axially arranged at intervals along the central shaft (1), and the second transverse stirring wing plate (31-1) and the third transverse stirring wing plate (14) positioned on the shaft sleeve assembly are axially arranged at intervals along the central shaft (1); the first vertical stirring wing plates (21-2) are vertically and downwards installed at the bottom of the lower end face of the upper frame (2), the second vertical stirring wing plates (31-2) are vertically and upwards installed at the top of the upper end face of the lower frame (3), and the stirring wing plates on the upper end face and the lower end face are arranged at intervals along the width direction of the frame.

8. The external double-frame bidirectional stirring drilling tool as set forth in claim 1, wherein: the top of the upper end face of the upper frame (2) is provided with an upward vertical upper toothed plate (22), and the bottom of the lower end face of the lower frame (3) is provided with cutting teeth (32).

9. The external double-frame bidirectional stirring drilling tool as set forth in claim 1, wherein: and wear-resistant material plates (10) are arranged on the vertical outer side walls of the upper frame (2) and the lower frame (3).