CN210395328U - Multi-power combined drill - Google Patents

Abstract

The utility model discloses a many power combination bores, including the main brill, the main brill is provided with at least a set of power agitating unit along the axial arrangement, and every power agitating unit of group includes the suit and is in cavity power device on the main brill and with the rabbling mechanism that cavity power device connects, rabbling mechanism wind under cavity power device's drive the main brill axis with the main brill syntropy or antiport. The utility model adopts the hollow power device as the driving source of each group of power stirring devices, which is directly sleeved and fixed on the main drill, thereby having convenient installation, small occupied space and convenient control and adjustment; the stirring mechanism operates independently of the main drill and is directly driven by the hollow power device, so that the mixing and stirring effect of slurry and soil is improved, and the pile forming quality is improved; a plurality of stirring components can be driven by one hollow power device, and each stirring component is not required to be provided with a power head, so that the energy consumption is reduced.

Description

Multi-power combined drill

Technical Field

The utility model relates to a pile foundation drill bit field especially relates to a many power combination bores.

Background

The deep cement mixing pile is one kind of foundation with cement as curing agent and soft soil or sand and the curing agent sprayed into soil are mixed forcibly in foundation to produce a series of physical and chemical reactions between the curing agent and soil, so that the soft soil is hardened into high strength foundation with integrity, water stability and certain strength. Therefore, the method is suitable for treating soft foundation such as silt, sandy soil, mucky soil, peat soil, silt and the like, has obvious effect, and can form piles, walls and the like after treatment. The cement mixing pile is divided into single-shaft, double-shaft and multi-shaft mixing piles according to the construction method and the number of drill rods of the deep mixing pile machine.

In the prior art, a multi-shaft mixing pile usually adopts a form that a main drill is combined with a plurality of secondary drills, for example, a multi-drill-bit combined drilling machine disclosed in the prior art comprises a driving device, a main frame, a combined drill rod and a combined drill bit, wherein the combined drill rod is connected with the driving device, the combined drill bit is connected with the combined drill rod, the combined drill bit comprises a gear box, an upper row of drill bits, a lower row of drill bits and a fixed support, the upper row of drill bits and the lower row of drill bits are respectively connected with an output shaft of a group of gear boxes, and an. This technical scheme adopts gear drive to realize many drill bits work, but gear drive has the structure and installs complicacy, bulky scheduling problem.

Besides the gear transmission mechanism, the multi-shaft stirring is realized in the prior art, and the multi-shaft stirring is also realized by configuring a power head for each secondary drill, and the secondary drill is usually externally arranged on the main drill and works independently with the main drill. This technical scheme must be equipped with the unit head for every bores, has the big problem of energy consumption.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that current multiaxis pile foundation drill bit has the structure complicacy, the energy consumption is big.

For realizing the purpose of the utility model, the utility model adopts the following technical scheme:

a multi-power combined drill comprises a main drill, wherein at least one group of power stirring devices are arranged on the main drill in an axial direction, each group of power stirring devices comprises a hollow power device sleeved on the main drill and a stirring mechanism connected with the hollow power device, and the stirring mechanisms rotate in the same direction or in the opposite direction with the main drill around the axis of the main drill under the driving of the hollow power device.

Further, the multi-power combination drill further has the following characteristics: the hollow power device is fixedly sleeved on the main drill and adopts any one of a hollow hydraulic motor, a hollow pneumatic motor, a hollow rotary platform and a hollow rotary cylinder;

preferably, the hollow power device adopts a hollow external rotation hydraulic motor in a hollow hydraulic motor, a fixed inner cylinder of the hollow external rotation hydraulic motor is fixedly connected with the main drill, and an external rotation cylinder of the hollow external rotation hydraulic motor is connected with the stirring mechanism as an output rotation cylinder.

Further, the multi-power combination drill further has the following characteristics: the stirring mechanism comprises at least one stirring sleeve which is rotatably sleeved on the main drill, and a plurality of first stirring blades which are radially arranged are arranged on the outer peripheral wall of the stirring sleeve;

and/or the stirring mechanism further comprises at least one stirring rod arranged in parallel to the main drill, and a plurality of second stirring blades arranged in a radial manner are arranged on the peripheral wall of the stirring rod;

preferably, the first stirring blade is provided with a first inclined surface facing the stirred object, and the first stirring blade is also provided with a first lower blade arranged at the bottom and a first upper blade arranged at the top; the second stirring blade is provided with a second inclined surface facing the stirred object, and the second stirring blade is also provided with a second lower blade arranged at the bottom and a second upper blade arranged at the top; in the rotating process, the first inclined plane and the second inclined plane are used for driving the materials to go upwards.

Further, the multi-power combination drill further has the following characteristics: each group of power stirring devices further comprises a bearing mechanism and a sealing mechanism, the stirring mechanism is rotatably connected with the main drill through the bearing mechanism, and the sealing mechanism is arranged on the unsealed end face of the bearing mechanism.

Further, the multi-power combination drill further has the following characteristics: the bearing mechanism comprises a base fixedly connected with the stirring mechanism and a bearing arranged in the base, and the base is in rotating fit connection with the main drill through the bearing; the sealing mechanism comprises a sealing sleeve sleeved on the main drill and a sealing piece arranged in the sealing sleeve, the sealing sleeve is in sealing connection with the main drill through the sealing piece, and the sealing sleeve is in sealing connection with the base through a sealing ring.

Further, the multi-power combination drill further has the following characteristics: the end surface of the sealing sleeve is of a frustum structure protruding outwards along the axial direction; the cross section outline shape of the base is a star-shaped structure.

Further, the multi-power combination drill further has the following characteristics: the lower end of the main drill is provided with a cutting head, and the cutting head is provided with a drill point with a drill edge and at least one spiral wing which is arranged on the peripheral wall of the cutting head and is close to the drill point; the spiral wing is provided with a continuous blade at the end part facing to the cut object;

preferably, the spiral wing is provided with a plurality of relieving teeth on the radial end surface close to the drill point.

Further, the multi-power combination drill further has the following characteristics: a wire slurry pipe is arranged on the peripheral wall of the main drill, an opening-expanding wire slurry port is formed in the wire slurry pipe, and a slurry conveying pipe which is communicated with the wire slurry port and penetrates to the top of the main drill is arranged in the main drill;

preferably, the installation height of the propeller tube is higher than the height of the tail end of the spiral wing; the spraying direction of the grout port is downward, and the spraying distance covers the center of the main drill to the edge of a drilling area of the main drill.

Further, the multi-power combination drill further has the following characteristics: a plurality of main drill stirring blades are radially arranged on the outer peripheral wall of the section of the main drill not provided with the power stirring device;

preferably, the main drill stirring blade is provided with an inclined surface facing the stirred object, and the main drill stirring blade is further provided with a drilling cutting edge arranged at the bottom and a drilling withdrawal cutting edge arranged at the top.

Further, the multi-power combination drill further has the following characteristics: the main drill is internally provided with a pipeline for laying a control pipeline of the hollow power device, a through hole for communicating the pipeline with the outside is formed in the mounting position of each hollow power device, and the control pipeline is connected with the corresponding hollow power device after passing through the pipeline and the through hole.

The utility model provides a many power combination bores has following advantage:

1) the hollow power device is used as a driving source of each group of power stirring devices, is directly sleeved and fixed on the main drill, does not have complex structures such as a gear transmission mechanism and the like, occupies less space, is beneficial to reducing the soil squeezing area, and is convenient to control and adjust;

2) the stirring mechanism is sleeved on the main drill and is directly driven by the hollow power device, is not externally arranged on the main drill and can operate independently of the main drill, so that the mixing and stirring effect of slurry and soil is improved, and the pile forming quality is improved;

3) the stirring mechanism can be a stirring sleeve sleeved on the main drill, or can also be a stirring rod arranged in parallel to the main drill, or the combination of the stirring sleeve and the stirring rod, a plurality of stirring parts can be driven by one hollow power device, and each stirring part is not required to be provided with a power head, so that the energy consumption is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a perspective view of a multi-power combination drill using a set of power stirring devices according to one embodiment;

FIG. 2 is a perspective view of a multi-power combination drill using two sets of power stirring devices according to one embodiment;

FIG. 3 is a schematic structural diagram of a stirring blade assembly formed by using 4 first stirring blades in the first embodiment;

FIG. 4 is an enlarged view of part A of FIG. 1;

FIG. 5 is a schematic view of a cutting head with relieved teeth according to one embodiment;

FIG. 6 is a schematic view of a half-section of a cutting head according to a first embodiment;

FIG. 7 is a schematic structural diagram of a main drill stirring blade group formed by using 4 main drill stirring blades in the first embodiment;

FIG. 8 is a perspective view of a multi-power combination drill according to a second embodiment;

FIG. 9 is an enlarged view of the portion B of FIG. 8;

FIG. 10 is a perspective view of a multi-power combination drill according to a third embodiment;

FIG. 11 is an exploded schematic view of a bearing mechanism and a sealing mechanism in accordance with a fourth embodiment;

FIG. 12 is a schematic structural view of a seal sleeve of a frustum-shaped structure according to a fourth embodiment;

FIG. 13 is a schematic cross-sectional view of a base having a star-shaped configuration according to a fourth embodiment;

FIG. 14 is a partial rotary cross-sectional view of a multi-power combination drill of the fifth embodiment.

In the drawings:

1. a main drill; 11. drilling a tip; 11a, a drill blade; 12. a helical wing; 12a, a blade; 12b, forming relieved teeth; 13. A wire-pulp pipe; 13a, a slurry port; 14. a pulp conveying pipe; 15. a main drill stirring blade; 15a, an inclined surface; 15b, drilling cutting edges; 15c, removing the drill cutting edge; 16. a pipeline; 17. a through hole;

2. a stirring mechanism; 21. a stirring sleeve; 22. a first stirring blade; 22a, a first inclined plane; 22b, a first lower edge; 22c, a first upper edge; 23. a stirring rod; 24. a second stirring blade; 24a, a second bevel; 24b, a second lower edge; 24c, a second upper edge;

3. a hollow power plant;

4. a bearing mechanism; 41. a base; 42. a bearing;

5. a sealing mechanism; 51. a sealing sleeve; 52. sealing member, 53, sealing washer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

< example one >

As shown in fig. 1 and fig. 2, the multi-power combined drill provided in this embodiment is used for pile foundation construction under the condition of a cement-soil mixing pile, and includes a main drill 1, and at least one group of power stirring devices arranged along the axial direction of the main drill 1, each group of power stirring devices includes a hollow power device 3 sleeved on the main drill 1 and a stirring mechanism 2 connected with the hollow power device 3, and the stirring mechanism 2 rotates around the axis of the main drill 1 in the same direction or in the opposite direction as the main drill 1 under the driving of the hollow power device 3. In the present embodiment, the hollow power unit 3 is disposed coaxially with the main drill 1.

Specifically, the hollow power device 3 has a through hole in the center thereof for the main drill 1 to pass through, and the hollow power device 3 is fixedly sleeved on the main drill 1 and can be fixed on the main drill 1 in a non-detachable manner (such as a welding manner), or can be fixed on the main drill 1 in a detachable manner (such as a fastening manner not shown in the figures), so that the hollow power device 3 can be detached for maintenance or replacement when a fault occurs. In the present embodiment, the hollow power unit 3 is any one of a hollow hydraulic motor, a hollow electric motor, a hollow pneumatic motor, a hollow rotary platform, a hollow rotary cylinder, and the like. The hollow power units 3 on different power stirring devices may be the same or different. The hollow rotary platform consists of a shell with a central through hole, a power head arranged in the shell, a gear arranged on an output shaft of the power head, an outer gear ring meshed with the gear and a rotary disc fixedly connected with the outer gear ring, wherein the outer gear ring is axially limited by the shell; when the drill bit is installed, the main drill 1 penetrates through a central through hole of the shell, and the shell is fixed on the main drill 1 through a connecting mode such as a fastener.

Preferably, the hollow power device 3 is a hollow external rotation hydraulic motor of a hollow hydraulic motor, a fixed inner cylinder of the hollow external rotation hydraulic motor is fixedly connected with the main drill 1, and an external rotation cylinder of the hollow external rotation hydraulic motor is connected with the stirring mechanism 2 as an output rotation cylinder. In the working process, the outer rotating cylinder also has a certain stirring effect due to the rotating motion.

Further, the stirring mechanism 2 is at least one stirring sleeve 21 axially sleeved on the main drill 1 along the main drill 1, and when two or more stirring sleeves 21 are adopted, the adjacent stirring sleeves 21 are fixedly connected. One end of the stirring mechanism 2 consisting of one or more stirring sleeves 21 is fixedly connected with an output rotary cylinder of the hollow power device 3 on the same group of power stirring devices 2.

Wherein, the outer peripheral wall of the stirring sleeve 21 is provided with a plurality of first stirring blades 22 which are radially arranged, and the arrangement mode can be welding, screw connection and the like. The first stirring blades 22 can be arranged on the stirring sleeve 21 at intervals or spirally arranged on the stirring sleeve 21; the stirring blade assemblies may be formed by a group of 2 to 5 first stirring blades 22, and the stirring blade assemblies may be arranged at intervals along the axial direction of the stirring sleeve 21, as shown in fig. 3.

Preferably, referring to fig. 3, the first stirring blade 22 is provided with a first inclined surface 22a facing the object to be stirred, and the first stirring blade 22 further has a first lower blade 22b disposed at the bottom and a first upper blade 22c disposed at the top. In the rotating process, the first lower blade 22b or the first upper blade 22c firstly tangentially stirs the materials, so that the resistance is reduced; meanwhile, as the first stirring blades 22 are provided with the first inclined surfaces 22a, part of redundant water in the slurry is easily separated along with the rotation of the stirring sleeve 21 and goes upwards along the first inclined surfaces 22a, and part of water is spirally gone upwards under the driving action of each first stirring blade 22, as shown by arrows of blade parts in fig. 1 and 2, the redundant water in the slurry is gradually taken out to the top of a pile foundation drill hole, so that the taken-out water can be discharged, and the problem of hole collapse caused by excessive water in the slurry is avoided. In the present embodiment, the included angle between the first inclined surface 22a and the vertical surface is 0 ° to 90 °, preferably 35 ° to 55 °.

Referring to fig. 4, in the present embodiment, the lower end of the main drill 1 is provided with a cutting head, specifically, the cutting head is provided with a drill tip 11 having a drill edge 11a and at least one spiral wing 12 disposed on the peripheral wall of the cutting head and adjacent to the drill tip 11. As a preferred technical scheme, the drill tip 11 is of an inverted cone structure with a large upper part and a small lower part, at least two drill blades 11a are distributed at intervals around the central axis of the drill tip 11, and the helical angle of each drill blade 11a is 5-85 degrees. The cutting head is secured to the main drill 1 by welding, or by screwing with fasteners not shown in the drawings, or is formed integrally during the manufacturing process of the main drill 1.

Referring to fig. 5, in addition, the spiral wing 12 is formed with a continuous blade 12a at the end facing the object to be cut, so as to reduce the cutting resistance during drilling; the flight 12 has a plurality of teeth 12b arranged on a radial end surface thereof adjacent to the drill tip 11, thereby improving the rock breaking and cutting ability of the planetary type positive and negative drill.

As shown in fig. 5 and 6, a grout pipe 13 is mounted on the outer peripheral wall of the cutting head of the main drill 1, a flared grout port 13a is opened on the grout pipe 13, and a grout conveying pipe 14 communicated with the grout port 13a and penetrating to the top of the main drill 1 is arranged in the main drill 1.

Preferably, the installation height of the grout pipe 13 is higher than the tail end height of the spiral wing 12, so that the grout pipe 13 is prevented from contacting the soil body firstly in the drilling process; the jetting direction of the grout port 13a is downward and the jetting distance covers the center of the main drill 1 to the edge of the drilling area of the main drill 1. In this embodiment, the bottom of the slurry outlet 13a is not covered by other parts, so that the sprayed slurry is directly mixed with the cut soil.

Referring to fig. 7, in the present embodiment, a plurality of main drill stirring blades 15 are radially arranged on the outer peripheral wall of the main drill 1 at the section where the power stirring device is not disposed; preferably, the main drill mixing blade 15 is provided with an inclined surface 15a facing the object to be mixed, and the main drill mixing blade 15 further has a drill-in cutting edge 15b provided at the bottom and a drill-out cutting edge 15c provided at the top. Inclined plane 15a that sets up on the main drill stirring vane 15 has the effect with first inclined plane 22a on first stirring vane 22, not only plays the effect of stirring, can also drive the unnecessary water of part in the thick liquids and go upward, avoids the thick liquids to cross rare hole collapse problem that leads to.

When drilling, the drilling cutting edge 15b on the main drill stirring blade 15 firstly cuts the mixture; when the drill is withdrawn, the main drill 1 is driven by the power device to rotate reversely and is lifted by the pile machine, the drill withdrawal cutting edge 15c on the main drill stirring blade 15 firstly cuts the mixture, and the path resistance is reduced. The stirring blades 15 of the main drill can be arranged on the main drill 1 at intervals or spirally arranged on the main drill 1; the main drill stirring blades 15 may be formed in a set of 2 to 5 main drill stirring blades 15, and the main drill stirring blades may be arranged at intervals in the axial direction of the main drill 1 in units of the main drill stirring blades, as shown in fig. 7.

In the working process of the embodiment, the main drill 1 is driven by a power device on a drilling machine, after the hollow power device 3 is connected with a power element and a control element of a hydraulic system, hydraulic oil is pumped into the hollow power device 3 by the power element, an output rotary cylinder of the hollow power device 3 is driven to rotate by external torque, the stirring sleeve 21 is driven to rotate, the rotating speed of the hollow power device 3 is regulated and controlled by the control element, and the like. Because when advancing to bore, the main brill 1 cuts the soil body, and the rotational speed is lower, through set up on main brill 1 by the rabbling mechanism 2 of 3 driven of cavity power device with the speed rotation that is higher than main brill 1 rotational speed, help improving the stirring degree of consistency of thick liquids and earth, improve and mix the stirring effect. Of course, the direction of rotation of the output rotary drum of the hollow power unit 3 may be the same as or opposite to that of the main drill 1, and preferably, the same direction as that of the first inclined surface 22a of the first stirring blade 22 of the power stirring unit.

< example two >

In the present embodiment, the same portions as those in the first embodiment are given the same reference numerals, and the same description is omitted.

As shown in fig. 8, compared to the first embodiment, the multi-power combination drill provided in this embodiment further has such a different structural design:

the stirring mechanism 2 is at least one stirring rod 23 which is parallel to the main drill 1, each stirring rod 23 is fixedly connected with the output rotating cylinder of the hollow power device 3, and a plurality of second stirring blades 24 which are radially arranged are arranged on the peripheral wall of each stirring rod 23. May be provided on the respective agitating bars 23 at intervals in units of the second agitating blades 24; the stirring blade assemblies may be formed by a set of 2 to 5 second stirring blades 24, and the stirring blade assemblies may be axially spaced along the respective stirring rods 23.

Referring to fig. 9, in the present embodiment, the second stirring blade 24 is provided with a second inclined surface 24a facing the object to be stirred, and the second stirring blade 24 further has a second lower blade 24b disposed at the bottom and a second upper blade 24c disposed at the top. In the rotating process, the second lower blade 24b or the second upper blade 24c firstly tangentially stirs the materials, so that the resistance is reduced; meanwhile, as the second stirring blades 24 are provided with the second inclined surfaces 24a, part of redundant water in the slurry is easily separated out along with the rotation of the stirring sleeve 21 and goes upwards along the second inclined surfaces 24a, and part of water is spirally gone upwards under the driving action of each second inclined surface 24a, so that the redundant water in the slurry is gradually brought out to the top of the pile foundation drill hole, and the problem of hole collapse caused by excessive water content in the slurry is avoided. In the present embodiment, the angle between the second inclined surface 24a and the vertical surface is 0 ° to 90 °, preferably 35 ° to 55 °.

Specifically, the second stirring blades 24 on the adjacent stirring rods 23 are arranged in a staggered manner, so that the second stirring blades 24 on the stirring rods 23 do not interfere with the adjacent stirring rods 23 and the second stirring blades 24 thereon.

Preferably, the radial length of the second stirring blade 24 is 0.51 to 0.99 times the distance between the adjacent stirring rods 23, and the stirring effect is enhanced by increasing the stirring area of each stirring rod 23.

Compared with the first embodiment, the present embodiment can provide a plurality of stirring rods 23 at the same level, so as to improve the stirring effect.

< example three >

In this embodiment, the same portions as those in the first and second embodiments are given the same reference numerals, and the same description is omitted.

As shown in fig. 10, compared to the first and second embodiments, the multi-power combination drill provided in this embodiment further has the following different structural design:

the stirring mechanism 2 comprises at least one stirring sleeve 21 which is sleeved on the main drill 1 in the first embodiment and at least one stirring rod 23 which is arranged in parallel to the main drill 1 in the second embodiment.

Specifically, the second stirring blade 24 on the stirring rod 23 does not interfere with the stirring sleeve 21 and the first stirring blade 22 on the stirring sleeve 21, the adjacent stirring rod 23 and the second stirring blade 24 thereon, and the stirring range of the second stirring blade 24 and the first stirring blade 22 partially overlaps.

Compared with the first embodiment and the second embodiment, the stirring range is large due to the fact that the middle of the stirring sleeve 21 is arranged, the outer ring of the stirring sleeve is provided with the stirring rod 23, the problem that local stirring cannot be achieved is avoided, and the stirring effect is improved.

< example four >

In this embodiment, the same portions as those in the first, second, and third embodiments are given the same reference numerals, and the same description is omitted.

Referring to fig. 8 to fig. 11, compared to the first, second and third embodiments, the multi-power combination drill provided in this embodiment further has the following different structural design:

each group of power stirring devices also comprises a bearing mechanism 4 connected with the stirring mechanism 2 and a sealing mechanism 5 arranged at the unsealed end of the bearing mechanism 4, wherein the bearing mechanism 4 comprises a base 41 fixedly connected with the stirring mechanism 2 and a bearing 42 arranged in the base 41, and the base 41 is in rotating fit connection with the main drill 1 through the bearing 42; the sealing mechanism 5 comprises a sealing sleeve 51 sleeved on the main drill 1 and a sealing element 52 arranged in the sealing sleeve 51, the sealing sleeve 51 is connected with the main drill 1 in a sealing mode through the sealing element 52, the sealing sleeve 51 is connected with the base 41 in a sealing mode through a sealing ring 53, and the sealing element 52 can be a sealing ring, an oil seal or a combination of the sealing ring and the oil seal.

When the stirring mechanism 2 is the stirring sleeve 21 in the first embodiment and the stirring sleeve 21+ stirring rod 23 in the third embodiment, the end of the stirring sleeve 21 may be fixedly connected to the upper end surface of the base 41 by a sealing ring or the like, and only the sealing mechanism 5 needs to be disposed on the lower end surface of the base 41.

In addition, in order to prevent the axial play of the bearing mechanism 4, a stopper mechanism such as a circlip may be provided on the main drill 1 to limit the axial play of the bearing mechanism 4.

Further, the end face of the sealing sleeve 51 is of a frustum-shaped structure protruding outward in the axial direction, as shown in fig. 12, so that the fluidity of the mixture of the slurry and the soil on the end face of the sealing sleeve 51 is enhanced, and soil accumulation is prevented.

Furthermore, the cross-sectional profile of the base 41 is a star-shaped structure, as shown in fig. 13, the portion connected with the stirring rod 23 is radially convex, and the portion not connected with the stirring rod 23 is formed with a recess, so that the occupation of unnecessary area is reduced as much as possible, and the soil squeezing area is reduced.

Compared with the first, second and third embodiments, the bearing mechanism 4 is additionally arranged in the first embodiment, which is beneficial to improving the stability of the stirring mechanism 2 in the rotation process, and the sealing mechanism 5 is additionally arranged to prevent mud from entering the bearing to influence the service life of the bearing, prevent mud from entering the stirring sleeve 21 and prevent the stirring sleeve 21 from being incapable of rotating relative to the main drill 1 due to the fact that the mud is solidified in the stirring sleeve 21.

< example five >

In this embodiment, the same portions as those in the first, second, third and fourth embodiments are given the same reference numerals, and the same description is omitted.

As shown in fig. 14, compared to the first, second, third and fourth embodiments, the multi-power combination drill provided in this embodiment further has such a different structural design:

the main drill 1 is also internally provided with a pipeline 16 for distributing a control pipeline, the main drill 1 is provided with a through hole 17 for communicating the pipeline 16 with the outside at the installation position of each hollow power device 3, and the control pipeline is connected with the corresponding hollow power device 3 after passing through the pipeline 16 and the through hole 17.

If the hollow power device 3 adopts a hollow hydraulic motor, a hollow rotary hydraulic cylinder and a hydraulic hollow rotary platform, the control pipeline adopts an oil pipeline to pass through the pipeline 16 and the through hole 17 and then is connected with the corresponding hollow power device 3; if the hollow power device 3 adopts a hollow motor and an electric hollow rotating platform, the control pipeline adopts a control wire to pass through the pipeline 16 and the through hole 17 and then is connected with the corresponding hollow power device 3; if the hollow power device 3 adopts a hollow pneumatic motor, a hollow rotary cylinder and a pneumatic hollow rotary platform, the control pipeline adopts a gas pipe to penetrate through the pipeline 16 and the through hole 17 and then is connected with the corresponding hollow power device 3.

Compared with the first, second, third and fourth embodiments, in the present embodiment, the pipeline 16 for laying the control pipeline of the hollow power device 3 is disposed inside the main drill 1, and compared with the case that the control pipeline is routed from the outside, the control pipeline of the hollow power device 3 can be prevented from being collided and cut by each stirring blade.

In the first to fifth embodiments, in the working process, along with the increase of the drilling depth, the top of the main drill 1 is overlapped and installed with the connecting shaft which has the same structure with the main body of the main drill 1, so that the requirement of pile foundation construction is met. Some technical implementations of the first to fifth embodiments may be combined or replaced.

The technical principles of the present invention have been described above with reference to specific embodiments, but it should be noted that the above descriptions are only for explaining the principles of the present invention, and should not be interpreted as specifically limiting the scope of the present invention in any way. Based on the explanation here, those skilled in the art can conceive of other embodiments of the present invention or equivalent alternatives without creative efforts, and will fall into the protection scope of the present invention.

Claims (10)

1. The multi-power combined drill comprises a main drill (1) and is characterized in that at least one group of power stirring devices are arranged on the main drill (1) along the axial direction, each group of power stirring devices comprises a hollow power device (3) sleeved on the main drill (1) and a stirring mechanism (2) connected with an output rotary cylinder of the hollow power device (3), and the stirring mechanism (2) is driven by the hollow power device (3) to rotate around the axis of the main drill (1) in the same direction or in the opposite direction of the main drill (1).

2. The multi-power combined drill according to claim 1, wherein the hollow power device (3) is fixedly sleeved on the main drill (1), and the hollow power device (3) adopts any one of a hollow hydraulic motor, a hollow electric motor, a hollow pneumatic motor, a hollow rotary platform and a hollow rotary cylinder;

the hollow power device (3) adopts a hollow external rotation hydraulic motor in a hollow hydraulic motor, a fixed inner cylinder of the hollow external rotation hydraulic motor is fixedly connected with the main drill (1), and an external rotation cylinder of the hollow external rotation hydraulic motor is connected with the stirring mechanism (2) as an output rotation cylinder.

3. The multi-power combined drill according to claim 1, wherein the stirring mechanism (2) comprises at least one stirring sleeve (21) rotatably sleeved on the main drill (1), and a plurality of first stirring blades (22) radially arranged are arranged on the outer peripheral wall of the stirring sleeve (21);

and/or the stirring mechanism (2) further comprises at least one stirring rod (23) which is arranged in parallel to the main drill (1), and a plurality of second stirring blades (24) which are radially arranged are arranged on the outer peripheral wall of the stirring rod (23);

the first stirring blade (22) is provided with a first inclined surface (22a) facing the stirred object, and the first stirring blade (22) is also provided with a first lower edge (22b) arranged at the bottom and a first upper edge (22c) arranged at the top; a second inclined surface (24a) facing the stirred object is arranged on the second stirring blade (24), and the second stirring blade (24) is also provided with a second lower blade (24b) arranged at the bottom and a second upper blade (24c) arranged at the top; in the rotating process, the first inclined surface (22a) and the second inclined surface (24a) are used for driving the materials to move upwards.

4. The multi-power combined drill according to claim 1, wherein each group of power stirring devices further comprises a bearing mechanism (4) and a sealing mechanism (5), the stirring mechanism (2) is rotatably connected with the main drill (1) through the bearing mechanism (4), and the sealing mechanism (5) is arranged on the unsealed end face of the bearing mechanism (4).

5. The multi-power combined drill according to claim 4, characterized in that the bearing mechanism (4) comprises a base (41) fixedly connected with the stirring mechanism (2) and a bearing (42) installed in the base (41), and the base (41) is connected with the main drill (1) in a rotating fit manner through the bearing (42); the sealing mechanism (5) comprises a sealing sleeve (51) sleeved on the main drill (1) and a sealing element (52) arranged in the sealing sleeve (51), the sealing sleeve (51) is connected with the main drill (1) in a sealing mode through the sealing element (52), and the sealing sleeve (51) is connected with the base (41) in a sealing mode through a sealing ring (53).

6. The multi-power combination drill according to claim 5, wherein the end surface of the sealing sleeve (51) is of a frustum-shaped structure which is convex in the axial direction; the cross-sectional outline shape of the base (41) is a star-shaped structure.

7. A multi-power combined drill according to claim 1, characterized in that the lower end of the main drill (1) is provided with a cutting head on which a drill tip (11) having a drill edge (11a) and at least one helical wing (12) arranged on the peripheral wall of the cutting head adjacent to the drill tip (11) are provided; the spiral wing (12) is provided with a continuous blade (12a) at the end facing the cut object;

the spiral wing (12) is provided with a plurality of relieving teeth (12b) on the radial end surface close to the drill point (11).

8. The multi-power combined drill according to claim 6, wherein a grout pipe (13) is installed on the outer peripheral wall of the main drill (1), a flared grout port (13a) is formed in the grout pipe (13), and a grout conveying pipe (14) which is communicated with the grout port (13a) and penetrates through the top of the main drill (1) is arranged in the main drill (1);

the installation height of the wire pulp pipe (13) is higher than the tail end height of the spiral wing (12); the spraying direction of the grout port (13a) is downward and the spraying distance covers the center of the main drill (1) to the edge of the drilling area of the main drill (1).

9. The multi-power combined drill according to claim 1, wherein the main drill (1) is provided with a plurality of main drill stirring blades (15) radially arranged on the outer peripheral wall of the section where the power stirring device is not arranged;

the main drill stirring blade (15) is provided with an inclined surface (15a) facing the stirred object, and the main drill stirring blade (15) is also provided with a drilling cutting edge (15b) arranged at the bottom and a drilling withdrawal cutting edge (15c) arranged at the top.

10. A multi-power combined drill according to any one of claims 1 to 9, characterized in that a pipeline (16) for laying a control pipeline of the hollow power device (3) is further arranged in the main drill (1), the main drill (1) is provided with a through hole (17) communicating the pipeline (16) and the outside at the installation position of each hollow power device (3), and the control pipeline is connected with the corresponding hollow power device (3) after passing through the pipeline (16) and the through hole (17).

Images