CN219864868U - Bidirectional stirring drilling tool with expanding function - Google Patents

Abstract

The utility model relates to a bidirectional stirring drilling tool with a diameter expanding function for a stirring pile machine, which comprises a diameter changing mechanism, a drill rod assembly, a bidirectional stirring drill bit, a hydraulic mechanism, a power unit, a suspension assembly and a grouting unit, wherein the drill rod assembly is arranged on the drill rod assembly; the upper end and the lower end of the two sets of hydraulic mechanisms are respectively and fixedly connected to a double-side upper supporting plate and a double-side lower supporting plate of the suspension assembly, the double-side upper supporting plate and the double-side lower supporting plate are respectively and fixedly connected with an upper power head and a lower power head, and a reducing mechanism is arranged on an outer drill rod; the hydraulic mechanism is used for driving the reducing mechanism to move in a reducing way, and the reducing mechanism moves along the circumferential direction under the power action of the power unit, so that the pore diameter of the drilling tool is changed, and a slurry spraying port is arranged in the reducing mechanism. The utility model provides a construction method of a bidirectional stirring drilling tool with a diameter expanding function. The variable diameter quantity of the bidirectional mixing pile can be accurately controlled through a hydraulic system, the pressure grouting of the variable diameter part can be realized through a grouting opening in the variable diameter mechanism, and the local diameter expansion of the bidirectional mixing pile at any pile section is finally realized.

Description

Bidirectional stirring drilling tool with expanding function

Technical Field

The utility model belongs to the technical field of curing agent stirring pile construction, and particularly relates to a diameter-expanding bidirectional stirring drilling tool.

Background

Soft soil foundation treatment in the building foundation engineering is a key link for ensuring engineering quality, and occupies a large proportion in the total price of the engineering. A large number of engineering practices show that the cement-soil mixing pile method has the advantages of simple and quick construction, small vibration and the like, and can effectively improve the stability of a soft soil foundation and reduce and control the settlement. The cement mixing pile is developed into a common soft foundation treatment method, and is widely applied to foundation pit support and foundation treatment.

The conventional stirring pile machine is generally a unidirectional stirring pile machine, and has the problems of single stirring direction, slurry overflow on the ground, uneven stirring, easy slurry feeding and blocking of a drill rod, poor pile forming quality, low pile forming efficiency and the like. In addition, many foundations have soil layers with different textures, and the foundation bearing capacity of the different soil layers is different, so that stirring piles with different pile diameters are needed. In the foundation pit supporting design, the upper part of the lateral pressure load of the actual soil body is far smaller than the lower part load, and stirring piles with different pile diameters are also needed. If the construction is carried out according to the small pile diameter, the strength of the cement-soil mixing pile is insufficient, so that safety accidents are caused; if the pile is constructed according to the large pile diameter, a large amount of curing agent is wasted, and the cost is increased. The traditional variable-section pile has the problems that the variable-diameter blades cannot be completely opened, so that the variable-diameter construction is not completed according to the design requirement, two pile diameters can be realized, the operation steps are complicated, and the like.

Disclosure of Invention

In order to overcome at least one defect in the prior art, the utility model provides a bidirectional stirring drilling tool with a diameter expanding function, which can realize bidirectional rotary stirring, and a stirring pile can realize rapid stepless diameter changing according to requirements, so that pile forming quality of the stirring pile is effectively improved.

In order to solve the technical problems, the utility model provides a bidirectional stirring drilling tool with a diameter expanding function, which comprises a diameter changing mechanism, a drill rod assembly, a bidirectional stirring drill bit, a hydraulic mechanism, a power unit, a suspension assembly and a grouting unit, wherein the drill rod assembly comprises an outer drill rod, an inner drill rod and a central pipe, wherein the outer drill rod, the inner drill rod and the central pipe are hollow, and the pipe diameters of the outer drill rod, the inner drill rod and the central pipe are sequentially reduced; the power unit comprises an upper power head and a lower power head, the upper end part of the outer drill rod is fixedly connected with the lower end part of the lower power head, and the upper end part of the inner drill rod is fixedly connected with the lower end part of the upper power head; the upper end and the lower end of the hydraulic mechanism are respectively and fixedly connected to the double-side upper supporting plate and the double-side lower supporting plate of the suspension assembly; the upper double-side supporting plates and the lower double-side supporting plates are respectively fixedly connected with the upper power head and the lower power head; the diameter changing mechanism is movably arranged on the outer drill rod, and the hydraulic mechanism is used for driving the double-side lower supporting plates to be close to or far away from the double-side upper supporting plates so as to drive the lower power head to be close to or far away from the upper power head, so that the outer drill rod and the inner drill rod are relatively close to or far away from each other along the axial direction, and the diameter changing mechanism is radially close to or far away from the axial lead direction of the drill rod assembly; the drill rod assembly drives the diameter changing mechanism to move along the circumferential direction of the drill rod assembly under the driving action of the power unit so as to change the diameter of the diameter changing mechanism; the two-way stirring drill bit is detachably connected to the lower end of the drill rod assembly, two-way rotation stirring is achieved under the rotation action of the outer drill rod and the inner drill rod, and the grouting unit is respectively communicated to the reducing mechanism and the two-way stirring drill bit.

Further, the reducing mechanism comprises an annular connecting seat and at least two reducing blades; the outer drill rod comprises a first outer drill rod and a second outer drill rod, the first outer drill rod and the inner drill rod can rotate relatively in the circumferential direction and can slide axially, the second outer drill rod and the inner drill rod can rotate relatively in the circumferential direction, and the annular connecting seat comprises an annular upper connecting seat connected to the bottom end of the first outer drill rod and an annular lower connecting seat connected to the top of the second outer drill rod; each variable-diameter blade comprises an upper variable-diameter blade and a lower variable-diameter blade; the upper end of the upper reducing blade is hinged with the annular upper connecting seat, the lower end of the lower reducing blade is hinged with the annular lower connecting seat, and the lower end of the upper reducing blade is hinged with the upper end of the lower reducing blade.

As an improved structure, a plurality of transmission torsion bars extending along the axial direction of the transmission torsion bars are arranged on the peripheral wall of the annular lower connecting seat, a plurality of transmission torsion bar seats are correspondingly arranged on the peripheral wall of the annular upper connecting seat, and the upper ends of the transmission torsion bars are respectively in sliding fit with the corresponding transmission torsion bar seats.

As another improvement structure, the lower extreme of first outer drilling rod is connected with outer hexagonal and passes and turn round the male joint, the upper end of second outer drilling rod is connected with interior hexagonal and passes and turn round the female joint, just the lower extreme that outer hexagonal passes turns round the male joint along the slidable cartridge in interior hexagonal passes and turns round the female joint.

Still further, an oil-free bushing is arranged in the annular gap between the outer drill rod and the inner drill rod, and the oil-free bushing comprises an upper oil-free bushing arranged between the lower end of the first outer drill rod and the outer wall of the inner drill rod and a lower oil-free bushing arranged between the top of the second outer drill rod and the outer wall of the inner drill rod; the outer ring of the upper oil-free bushing is fixedly connected with the first outer drill rod, and the inner ring is in sliding fit with the inner drill rod along the axial direction; the lower oil-free bushing outer ring is fixedly connected with the second outer drill rod, and the inner ring is matched with the outer wall of the inner drill rod in a relatively rotatable mode along the circumferential direction.

Still further, the bi-directional stirring drill bit comprises an outer pipe fixedly connected to the lower end of the outer drill rod and an inner pipe fixedly connected to the lower end of the inner drill rod; the outer wall of the inner pipe is connected with a first stirring blade, the outer pipe is connected with an outer frame, the inner wall of the outer frame is provided with a second stirring blade, and the second stirring blade and the first stirring blade can rotate relatively without interference; the bottom end of the inner tube is connected with a tunneling wing piece.

Still further, the grouting unit comprises a first grouting channel arranged between the outside of the central pipe and the inner wall of the inner drill pipe and a second grouting channel arranged in the central pipe; a first grouting port communicated with the first grouting channel is formed in the outer wall of the inner drill rod at a position corresponding to the reducing mechanism; and a third grouting port communicated with the second grouting channel is formed in the tunneling wing piece.

Still further, the hydraulic mechanism comprises a hydraulic pump station and two hydraulic cylinders; the hydraulic pump station is fixedly connected below the upper cover plate of the suspension assembly and used for providing power for the hydraulic oil cylinder, and a control system of the hydraulic pump station is integrated in a control panel of the driving cabin of the pile driver through an electromagnetic valve; the upper and lower ends of the two hydraulic cylinders are respectively connected to the two-side upper supporting plates and the two-side lower supporting plates.

Still further, the hydraulic mechanism also comprises a guide mechanism, wherein the guide mechanism comprises an upper guide seat, a guide shaft and a lower guide seat, and the upper guide seat and the lower guide seat are respectively and fixedly connected to the two-side upper supporting plates and the two-side lower supporting plates; the lower end of the guide shaft is fixedly connected with the lower guide seat, and the upper end of the guide shaft is in sliding connection with the upper guide seat.

Compared with the prior art, the bidirectional stirring drilling tool and the construction method thereof have the following technical effects:

1. based on the bidirectional stirring drilling tool with the diameter expanding function and the multilayer bidirectional shearing stirring construction method, the defects of uneven stirring, slurry discharge on the earth surface, sticking and holding of the paste drill, low pile body strength, large material consumption, long construction time and the like inherent in the traditional unidirectional stirring drilling machine are overcome, the material consumption is reduced, the construction period is saved, the uniformity of the bidirectional stirring pile and the pile body strength are greatly improved, and the construction quality is comprehensively improved.

2. The traditional variable-diameter pile has the advantages that the variable-diameter blades cannot be fully opened, so that the variable-diameter construction is often not completed according to the design requirement, and only two pile diameters can be realized, the bidirectional stirring drilling tool with the diameter expansion function provided by the utility model adopts a hydraulic system, so that the problem of insufficient diameter reduction is solved, and the diameter expansion mechanism can flexibly deform and adjust the diameter expansion size to realize stepless diameter variation; in the pile forming process of the expanding bidirectional stirring pile, the bidirectional stirring technology and the expanding mechanical cutting stirring technology are combined, so that the mechanical cutting stirring expanding of the stirring pile can be implemented by adopting an expanding mechanism according to the pile body position and the pile body shape design.

3. The bidirectional stirring drilling tool with the diameter expanding function provided by the utility model has the advantages that the control system is integrated on the control panel of the cockpit through the electromagnetic valve, the diameter changing process can be controllable and visible, and the bidirectional stirring drilling tool is convenient and quick. By adopting an operation control (module) technology, pile construction parameters are preset, the diameter expansion of different diameters can be implemented on any pile section at the top or bottom and the middle of a pile body through real-time control of pile forming depth and diameter expansion parameters, the mixing amount of curing agents of different diameter expansion bodies can be regulated through a guniting control technology, and a variable-diameter bidirectional stirring pile with a variable size and a sugar-gourd shape is constructed, so that the aims of regulating the strength of different pile sections and improving the bearing capacity of the whole pile are fulfilled.

4. The tool device of the utility model avoids the defects of complex opening and closing operation, easy damage to components, time consuming use, high failure rate and the like which are difficult to solve by the traditional mechanical expanding stirring pile drilling tool, and thoroughly solves the technical problem that the traditional mechanical expanding stirring pile drilling tool can not realize expanding at the bottom of the bidirectional stirring pile.

Additionally, other improved features and advantages of the utility model will be set forth in the detailed description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

FIG. 1 is a front view of the open state structure of a bi-directional stirring drilling tool with a diameter expanding function of the utility model;

FIG. 2 is an axial view showing the structure of the bidirectional stirring drilling tool with the diameter expanding function in the open state;

FIG. 3 is a front view of the closed state structure of the bidirectional stirring drilling tool with the diameter expanding function;

FIG. 4 is another angular axial view of the bi-directional stirring drilling tool with expanding function of the present utility model in an open state;

FIG. 5 is a sectional view showing an opened state of the bidirectional stirring drilling tool with the diameter expanding function according to the present utility model;

FIG. 6 is a partial cross-sectional view of the reducing mechanism of the present utility model;

FIG. 7 is a schematic view of the opening state of the reducing mechanism in the present utility model;

FIG. 8 is a schematic view of the hydraulic mechanism of the bi-directional stirring drilling tool with diameter expansion function of the present utility model in an open state;

FIG. 9 is a schematic view of a bi-directional stirring drill bit with a diameter-expanding function of the bi-directional stirring drill tool of the present utility model;

FIG. 10 is a schematic view of a second embodiment of a bi-directional stirring drilling tool with diameter expansion according to the present utility model in an open state;

FIG. 11 is a schematic diagram of an exploded construction of a variable diameter section drill rod of a second embodiment of the bi-directional stirring drilling tool with diameter expansion function of the present utility model;

FIG. 12 is a vertical cross-sectional view of a two-way stirring drill with diameter expansion function of the present utility model in a second open state;

FIG. 13 is a cross-sectional view taken along line A-A of FIG. 12;

FIG. 14 is a section B-B of FIG. 12;

FIG. 15 is a section C-C of FIG. 12;

FIG. 16 is an axial view showing an opened state of a bidirectional stirring tool with a diameter-enlarging function according to a third embodiment of the present utility model;

FIG. 17 is a partial cross-sectional view of a reducing mechanism of a third embodiment of a bi-directional stirring drilling tool with a diameter expansion feature of the present utility model;

fig. 18 is a transverse cross-sectional view of a drill rod assembly of a third embodiment of the present utility model.

Wherein the figures show:

1. a reducing mechanism; 2. a drill rod assembly; 3. a central tube; 4. an inner drill rod; 5. an outer drill rod; 5.1, a first outer drill rod; 5.2, a second outer drill rod; 6. a grouting unit; 6.1, a first grouting channel; 6.2, a second grouting channel; 6.3, a third grouting channel; 7. an oilless bushing; 7.1, an oil-free bushing; 7.2, lower oilless bushing; 8. an annular connecting seat; 8.1, an annular upper connecting seat; 8.2, an annular lower connecting seat; 9. a variable diameter vane; 9.1, upper reducing blades; 9.2, lower reducing blades; 10. a hinged support shaft seat; 10.1, a first hinge support shaft seat; 10.2, a second hinge support shaft seat; 10.3, a third hinge support shaft seat; 11. a double-sided upper support plate; 12. two side bottom plates; 14. a guide backboard; 14.1, upper sliding guide backboard; 14.2, lower sliding guide backboard; 15. an upper power head; 16. a lower power head; 19. a guide mechanism; 19.1, upper guide seats; 19.2, a guide shaft; 19.3, lower guide seats; 20. an upper cover plate; 30. a hydraulic mechanism; 31. a hydraulic pump station; 32. a hydraulic cylinder; 33. a hydraulic cylinder connecting seat; 33.1, a connecting seat is arranged on the hydraulic cylinder; 33.2, a hydraulic cylinder lower connecting seat; 34. a first guniting port; 35. a second guniting port; 36. a third guniting port; 37. a first tap; 38. a second tap; 39. a third tap; 40. a guniting pipe; 42. a bi-directional stirring drill bit; 42.1, an outer frame; 42.2, a first stirring blade; 42.3, a second stirring blade; 42.4, tunneling blades; 43. a flexible tube; 45. an outer tube; 46. an inner tube; 50. a torque transmission mechanism; 50.1, a torsion bar upper support; 50.2, transmitting torsion bars; 50.3, transmitting a torsion bar lower support; 50.4, an external hexagonal torque transmission male connector; 50.5, internal hexagonal torque transmission female connector.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper end", "lower end", "outer side wall", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the utility model.

In the description of the utility model, it should be noted that, unless explicitly specified and defined otherwise, the term "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in the utility model will be understood by those of ordinary skill in the art in a specific context.

Embodiment one:

as shown in fig. 1-9: the utility model provides a bidirectional stirring drilling tool with a diameter expanding function, which comprises a diameter changing mechanism 1, a drill rod assembly 2, a bidirectional stirring drill bit 42, a hydraulic mechanism 30, a power unit, a suspension assembly and a grouting unit 6. The drill rod assembly 2 comprises an outer drill rod 5, an inner drill rod 4 and a central pipe 3, wherein the outer drill rod 5, the inner drill rod 4 and the central pipe 3 are of hollow structures and the pipe diameters of the outer drill rod 5, the inner drill rod 4 and the central pipe 3 are sequentially reduced; the power unit comprises an upper power head 15 and a lower power head 16, the upper end part of the outer drill rod 5 is fixedly connected with the lower end part of the lower power head 16, and the upper end part of the inner drill rod 4 is fixedly connected with the lower end part of the upper power head 15; the upper and lower ends of the hydraulic mechanism 30 are fixedly connected to the double-sided upper support plate 11 and the double-sided lower support plate 12 of the suspension assembly respectively; the double-sided upper supporting plate 11 and the double-sided lower supporting plate 12 are respectively fixedly connected with an upper power head 15 and a lower power head 16; the reducing mechanism 1 is movably arranged on the outer drill rod 5, and the hydraulic mechanism 30 is used for driving the double-side lower supporting plate 12 to be close to or far away from the double-side upper supporting plate 11 so as to drive the lower power head 16 to be close to or far away from the upper power head 15, so that the outer drill rod 5 and the inner drill rod 4 are relatively close to or far away from each other along the axial direction, and the radial direction of the reducing mechanism 1 is close to or far away from the axial lead direction of the drill rod assembly 2; the drill rod assembly 2 drives the reducing mechanism 1 to move along the circumferential direction of the drill rod assembly 2 under the driving action of the power unit 48 so as to change the diameter of the reducing mechanism 1 and finally realize the change of the pore diameter of the drilling tool; the other bidirectional stirring drill bit 42 is detachably connected to the lower end of the drill rod assembly 2, and bidirectional rotation stirring is realized under the rotation action of the outer drill rod 5 and the inner drill rod 4, and the grouting unit 6 is respectively communicated to the reducing mechanism 1 and the bidirectional stirring drill bit 42, so that spraying while stirring is realized.

Specifically, as shown in fig. 6 and 7, the reducing mechanism 1 includes an annular connecting seat 8 and at least two reducing blades 9; the outer drill rod 5 comprises a first outer drill rod 5.1 and a second outer drill rod 5.2, the first outer drill rod 5.1 and the inner drill rod 4 can rotate relatively along the circumferential direction and can slide along the axial direction, the second outer drill rod 5.2 and the inner drill rod 4 can rotate relatively along the circumferential direction, and the annular connecting seat 8 comprises an annular upper connecting seat 8.1 connected to the bottom end of the first outer drill rod and an annular lower connecting seat 8.2 connected to the top of the second outer drill rod; each variable-diameter vane 9 comprises an upper variable-diameter vane 9.1 and a lower variable-diameter vane 9.2; the upper end of the upper reducing blade 9.1 is hinged with the annular upper connecting seat 8.1, the lower end of the lower reducing blade 9.2 is hinged with the annular lower connecting seat 8.2, and the lower end of the upper reducing blade 9.1 is hinged with the upper end of the lower reducing blade 9.2. More specifically, in this embodiment, hinge bases 10 are disposed at each hinge position, that is, a plurality of first hinge bases 10.1 distributed along the circumferential direction are disposed on the outer wall of the annular upper connecting base 8.1, the upper ends of the upper variable-diameter blades 9.1 are rotatably connected to the first hinge bases 10.1, and likewise, the lower ends of the upper variable-diameter blades 9.1 are rotatably connected to the upper ends of the lower variable-diameter blades 9.2 through the second hinge bases 10.2, a plurality of third hinge bases 10.3 distributed along the circumferential direction are disposed on the outer wall of the annular lower connecting base 8.2, and the lower ends of the lower variable-diameter blades 9.2 are rotatably connected to the corresponding third hinge bases 10.3; the upper reducing blades 9.1 and the lower reducing blades 9.2 are relatively rotated along the radial direction of the drill rod assembly 2 by the relative movement between the outer drill rod 5 and the inner drill rod 4, so that the change adjustment of the outer diameter of the drill hole is realized.

On the other hand, in order to realize the torque transmission effect of the reducing mechanism 1 in the structure, the stability of drilling is ensured, and the torque transmission mechanism 50 is further arranged in the reducing mechanism 1; in this embodiment, a plurality of torsion bars 50.2 extending along the axial direction thereof are specifically disposed on the outer peripheral wall of the annular lower connecting seat 8.2, correspondingly, a plurality of torsion bar upper supports 50.1 are correspondingly disposed on the outer peripheral wall of the annular upper connecting seat 8.1, the upper ends of the torsion bars 50.2 are respectively slidably fitted in the corresponding torsion bar upper supports 50.1, and the lower ends of the torsion bars 50.2 are connected to the annular lower connecting seat 8.2 through the torsion bar lower supports 50.3, as shown in fig. 7.

In addition, in this embodiment, as shown in fig. 5 and 6, in order to better ensure smooth relative rotation between the outer drill rod 5 and the inner drill rod 4, an oil-free bushing 7 is disposed in an annular gap between the outer drill rod 5 and the inner drill rod 4, and the oil-free bushing 7 includes an upper oil-free bushing 7.1 disposed between the lower end of the first outer drill rod 5.1 and the outer wall of the inner drill rod 4, and a lower oil-free bushing 7.2 disposed between the top of the second outer drill rod 5.2 and the outer wall of the inner drill rod 4; the outer ring of the upper oil-free bushing 7.1 is fixedly connected with the first outer drill rod 5.1, and the inner ring is in sliding fit with the inner drill rod 4 along the axial direction; the outer ring of the lower oil-free bushing 7.2 is fixedly connected with the second outer drill rod 5.2, and the inner ring is matched with the outer wall of the inner drill rod 4 in a relative rotating way along the circumferential direction. In this structure, can also adopt the form of going up oilless bush 7.1 inner circle and interior drilling rod 4 outer wall fixed connection, outer lane and first outer drilling rod 5.1 sliding fit, corresponding oilless bush 7.2 inner circle and interior drilling rod 4 outer wall fixed connection, but outer lane and second outer drilling rod 5.2 along circumference relative running fit.

In still another aspect, as shown in fig. 2, 3 and 9, the bi-directional stirring drill bit in the above structure includes an outer pipe 45 fixedly connected to the lower end of the outer drill pipe 5 and an inner drill pipe 46 fixedly connected to the lower end of the inner drill pipe 4; the outer wall of the inner drill rod 46 is connected with a first stirring blade 42.2, the outer tube 45 is connected with an outer frame 42.1, the inner wall of the outer frame 42.1 is provided with a second stirring blade 42.3, the second stirring blade 42.3 and the first stirring blade 42.2 can rotate relatively without interference, and the outer drill rod 5 and the inner drill rod 4 rotate relatively under the action of a power unit 48, so that the bidirectional stirring drill bit 42 is driven to stir bidirectionally; in addition, the bottom end of the inner pipe is connected with a tunneling wing piece 42.4, so that the rotary stirring effect is further enhanced, and the quality of the stirring pile is ensured.

In addition, as shown in fig. 6 and 13, the grouting unit 6 comprises a first grouting channel 6.2 arranged between the outside of the central tube 3 and the inner wall of the inner drill rod 4 and a second grouting channel 6.2 arranged in the central tube 3; a first grouting port 34 communicated with the first grouting channel 6.1 is formed in the outer wall of the inner drill rod 4 at a position corresponding to the reducing mechanism 1; in addition, at least one gunite opening is arranged in the bi-directional stirring drill bit 42, and can be arranged on the first stirring blade 42.2 or the tunneling blade 42.4, and the section form of the gunite opening can be various forms such as a circle, a square, a diamond and the like. In addition, a second grouting port 35 communicated with the first grouting channel 6.1 can be arranged on the outer wall of the inner pipe 46; the ripping tab 42.4 is provided with a third grout outlet 36 communicating with the second grouting channel 6.3. More specifically, a first tap 37 communicating with the first grouting channel 6.1 and a second tap 38 communicating with the second grouting channel 6.2 are provided on the upper power head 15, as shown in fig. 2.

As shown in fig. 2, 4 and 8, the hydraulic mechanism 30 includes a hydraulic pump station 31 and two hydraulic cylinders 32; the hydraulic pump station 31 is fixedly connected below the upper cover plate 20 of the suspension assembly 47 and used for providing power for the hydraulic cylinder 32, and a control system of the hydraulic pump station 31 is integrated in a control panel of the driving cab of the pile driver through an electromagnetic valve; the upper and lower ends of the two hydraulic cylinders 32 are respectively connected to the double-side upper supporting plate 11 and the double-side lower supporting plate 12 through hydraulic cylinder connecting seats 33; specifically, the upper hydraulic cylinder connecting seats 33.1 for connecting the upper ends of the two hydraulic cylinders 32 are provided on the upper double-sided support plates 11, and the lower hydraulic cylinder connecting seats 33.2 for connecting the lower ends of the two hydraulic cylinders 32 are provided on the lower double-sided support plates 12.

In order to ensure the stability of the relative movement between the upper power head and the lower power head, the hydraulic mechanism 30 in the structure further comprises a guide mechanism 19, wherein the guide mechanism 19 comprises an upper guide seat 19.1, a guide shaft 19.2 and a lower guide seat 19.3, and the upper guide seat 19.1 and the lower guide seat 19.3 are respectively and fixedly connected to the double-side upper supporting plate 11 and the double-side lower supporting plate 12; the lower end of the guide shaft 19.2 is fixedly connected with the lower guide seat 19.3, and the upper end is in sliding connection with the upper guide seat 19.1, as shown in fig. 2, 4 and 8.

In the above structure, the suspension assembly is slidably matched with the guide assembly of the pile machine through the guide back plate 14, specifically, the guide back plate 14 includes an upper sliding guide back plate 14.1 and a lower sliding guide back plate 14.2, in addition, one ends of the double-sided upper supporting plates 11 are respectively connected to two sides of the upper sliding guide back plate 14.1, and one ends of the double-sided lower supporting plates 12 are respectively connected to two sides of the lower sliding guide back plate 14.2, as shown in fig. 2.

Embodiment two:

as shown in fig. 10-15, the general structure of this embodiment is the same as that of the first embodiment, the only difference being the specific form of the torque transmission mechanism 50; in this embodiment, the lower end of the first outer drill rod 5.1 is connected with an outer hexagonal torque transmission male connector 50.4, the upper end of the second outer drill rod 5.2 is connected with an inner hexagonal torque transmission female connector 50.5, and the lower end of the outer hexagonal torque transmission male connector 50.4 is axially slidably inserted into the inner hexagonal torque transmission female connector 50.5, so that torque transmission is realized through a polygonal insertion structure, and the structure is simple and stable.

Embodiment III:

as shown in fig. 16, 17 and 18, the general structure of this embodiment is the same as that of the first embodiment, except that in this embodiment, the grouting unit 6 may further include a third grouting passage 6.3 provided between the outer wall of the inner drill pipe 4 and the inner wall of the first outer drill pipe 5.1, a third tap 39 communicating with the third grouting passage 6.3 is provided on the lower power head 16, and a grouting pipe 40 communicating with the third grouting passage 6.3 is provided on the inner wall of the upper reducing vane 9.1, and an end of the grouting pipe 40 near the first outer drill pipe 5.1 is connected with the third grouting passage 6.3 through a flexible pipe 43, and an outlet of the grouting pipe 40 replaces the first grouting port 34 in the first embodiment.

In addition, the upper oil-free bushing 7.1 in the embodiment can only adopt a mode of fixedly connecting the outer ring with the first outer drill rod 5.1 and axially sliding and matching the inner ring with the inner drill rod 4; the lower oilless bushing 7.2 is connected in the same manner as in the first embodiment.

Although the present disclosure is disclosed above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the disclosure.

Claims (9)

1. The bidirectional stirring drilling tool with the diameter expanding function comprises a diameter changing mechanism (1), a drill rod assembly (2), a bidirectional stirring drill bit (42), a hydraulic mechanism (30), a power unit, a suspension assembly and a grouting unit (6), wherein the drill rod assembly (2) comprises an outer drill rod (5), an inner drill rod (4) and a central pipe (3), wherein the outer drill rod is hollow, and the pipe diameter of the outer drill rod is sequentially reduced; the power unit comprises an upper power head (15) and a lower power head (16), the upper end part of the outer drill rod (5) is fixedly connected with the lower end part of the lower power head (16), and the upper end part of the inner drill rod (4) is fixedly connected with the lower end part of the upper power head (15); the method is characterized in that: the upper end and the lower end of the hydraulic mechanism (30) are respectively and fixedly connected to the double-side upper supporting plate (11) and the double-side lower supporting plate (12) of the suspension assembly; the double-side upper supporting plate (11) and the double-side lower supporting plate (12) are respectively fixedly connected with the upper power head (15) and the lower power head (16); the diameter changing mechanism (1) is movably arranged on the outer drill rod (5), the hydraulic mechanism (30) is used for driving the double-side lower supporting plate (12) to be close to or far away from the double-side upper supporting plate (11) so as to drive the lower power head (16) to be close to or far away from the upper power head (15), and accordingly the outer drill rod (5) and the inner drill rod (4) are relatively close to or far away from each other along the axial direction, and the diameter changing mechanism (1) is radially close to or far away from the axial lead direction of the drill rod assembly (2); the drill rod assembly (2) drives the diameter changing mechanism (1) to move along the circumferential direction of the drill rod assembly (2) under the driving action of the power unit so as to change the diameter of the diameter changing mechanism (1); the bidirectional stirring drill bit (42) is detachably connected to the lower end of the drill rod assembly (2), bidirectional rotation stirring is achieved under the rotation action of the outer drill rod (5) and the inner drill rod (4), and the grouting units are respectively communicated to the reducing mechanism (1) and the bidirectional stirring drill bit (42).

2. The bidirectional stirring drilling tool with the diameter expanding function according to claim 1, wherein: the reducing mechanism (1) comprises an annular connecting seat (8) and at least two reducing blades (9); the outer drill rod (5) comprises a first outer drill rod (5.1) and a second outer drill rod (5.2), the first outer drill rod (5.1) and the inner drill rod (4) can rotate relatively along the circumferential direction and can slide along the axial direction, the second outer drill rod (5.2) and the inner drill rod (4) can rotate relatively along the circumferential direction, and the annular connecting seat (8) comprises an annular upper connecting seat (8.1) connected to the bottom end of the first outer drill rod (5.1) and an annular lower connecting seat (8.2) connected to the top of the second outer drill rod (5.2); each reducing blade (9) comprises an upper reducing blade (9.1) and a lower reducing blade (9.2); the upper end of the upper reducing blade (9.1) is hinged with the annular upper connecting seat (8.1), the lower end of the lower reducing blade (9.2) is hinged with the annular lower connecting seat (8.2), and the lower end of the upper reducing blade (9.1) is hinged with the upper end of the lower reducing blade (9.2).

3. The bidirectional stirring drilling tool with the diameter expanding function according to claim 2, wherein: the annular lower connecting seat (8.2) is provided with a plurality of transmission torsion bars (50.2) extending along the axial direction of the transmission torsion bars, the annular upper connecting seat (8.1) is correspondingly provided with a plurality of transmission torsion bar upper supports (50.1) on the outer peripheral wall, and the upper ends of the transmission torsion bars (50.2) are respectively in sliding fit with the corresponding transmission torsion bar upper supports (50.1).

4. The bidirectional stirring drilling tool with the diameter expanding function according to claim 2, wherein: the lower extreme of first outer drilling rod (5.1) is connected with outer hexagonal transmission and turns round public joint (50.4), the upper end of second outer drilling rod (5.2) is connected with interior hexagonal transmission and turns round female joint (50.5), just the lower extreme of outer hexagonal transmission and turns round public joint (50.4) along the slidable cartridge in interior hexagonal transmission and turns round female joint (50.5).

5. The bidirectional stirring drilling tool with the diameter expanding function according to any one of claims 2 to 4, wherein: an oil-free bushing (7) is arranged in an annular gap between the outer drill rod (5) and the inner drill rod (4), and the oil-free bushing (7) comprises an upper oil-free bushing (7.1) arranged between the lower end of the first outer drill rod (5.1) and the outer wall of the inner drill rod (4) and a lower oil-free bushing (7.2) arranged between the top of the second outer drill rod (5.2) and the outer wall of the inner drill rod (4); the outer ring of the upper oil-free bushing (7.1) is fixedly connected with the first outer drill rod (5.1), and the inner ring is in sliding fit with the inner drill rod (4) along the axial direction; the outer ring of the lower oil-free bushing (7.2) is fixedly connected with the second outer drill rod (5.2), and the inner ring is matched with the outer wall of the inner drill rod (4) in a relatively rotatable mode along the circumferential direction.

6. The bidirectional stirring drilling tool with the diameter expanding function according to claim 2, wherein: the bidirectional stirring drill bit comprises an outer pipe (45) fixedly connected to the lower end of the outer drill rod (5) and an inner pipe (46) fixedly connected to the lower end of the inner drill rod (4); the outer wall of the inner pipe (46) is connected with a first stirring blade (42.2), the outer pipe (45) is connected with an outer frame (42.1), the inner wall of the outer frame (42.1) is provided with a second stirring blade (42.3), and the second stirring blade (42.3) and the first stirring blade (42.2) can rotate relatively without interference; the bottom end of the inner pipe (46) is connected with a tunneling wing piece (42.4).

7. The bidirectional stirring drilling tool with the diameter expanding function according to claim 6, wherein: the grouting unit (6) comprises a first grouting channel (6.1) arranged between the outside of the central pipe (3) and the inner wall of the inner drill rod (4) and a second grouting channel (6.2) arranged in the central pipe (3); a first grouting port (34) communicated with the first grouting channel (6.1) is formed in the outer wall of the inner drill rod (4) at a position corresponding to the reducing mechanism (1); and a third grouting opening (36) communicated with the second grouting channel (6.2) is arranged on the tunneling wing piece (42.4).

8. The bidirectional stirring drilling tool with the diameter expanding function according to claim 1, wherein: the hydraulic mechanism (30) comprises a hydraulic pump station (31) and two hydraulic cylinders (32); the hydraulic pump station (31) is fixedly connected below the upper cover plate (23) of the suspension assembly and used for providing power for the hydraulic oil cylinder (32), and a control system of the hydraulic pump station (31) is integrated in a control panel of a driving cab of the pile driver through an electromagnetic valve; the upper and lower ends of the two hydraulic cylinders (32) are respectively connected to the double-side upper supporting plate (11) and the double-side lower supporting plate (12).

9. The bidirectional stirring drilling tool with the diameter expanding function according to claim 8, wherein: the hydraulic mechanism (30) further comprises a guide mechanism (19), the guide mechanism (19) comprises an upper guide seat (19.1), a guide shaft (19.2) and a lower guide seat (19.3), and the upper guide seat (19.1) and the lower guide seat (19.3) are respectively and fixedly connected to the double-side upper supporting plate (11) and the double-side lower supporting plate (12); the lower end of the guide shaft (19.2) is fixedly connected with the lower guide seat (19.3), and the upper end of the guide shaft is in sliding connection with the upper guide seat (19.1).