CN110725300B

CN110725300B - A two-way agitating pile driver with a power down

Info

Publication number: CN110725300B
Application number: CN201911020920.9A
Authority: CN
Inventors: 王保田; 左晋宇; 李文炜; 张海霞; 卜桐; 李云飞; 王召顺
Original assignee: Hohai University HHU
Current assignee: Hohai University HHU
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2021-02-12
Anticipated expiration: 2039-10-25
Also published as: CN110725300A

Abstract

The invention discloses a power-down bidirectional mixing pile machine, which comprises a pile machine bearing platform, a press-pull pile, a guide rod, a bidirectional mixing drill bit and a power system, wherein the guide rod is arranged in the middle of the pile machine bearing platform and penetrates downwards; the power system is arranged on a pile bearing platform of the pile machine and provides power for the whole pile machine; kinetic energy dissipation when the drill rod rotates is reduced, and meanwhile, the phenomenon of pipe blockage of the inner drill rod and the outer drill rod is not easy to occur; the replaceable tooth piece is used for drilling, the spiral blade only plays a role in stirring, the tooth piece is easy to replace, and the drilling capability is stronger; the spiral blade has stronger space stirring capability, and the pile body is uniformly stirred, so that the pile forming quality is high.

Description

Bidirectional stirring pile machine with power arranged at bottom

Technical Field

The invention relates to a bidirectional stirring pile machine with a lower power, and belongs to the technical field of mechanical equipment for reinforcing soft soil.

Background

The cement mixing pile is used for mixing and solidifying soft soil to form a composite foundation, so that the strength parameter of the soil body of the foundation is improved, and the cement mixing pile is widely applied to the treatment of the soft soil foundation. In recent years, cement mixing piles begin to appear in the treatment of channel side slopes, the composite foundation is required to have anti-sliding capacity in the range of possible sliding of the side slopes in the engineering, and the pile forming quality of the mixing piles is required to be higher. Generally, a bidirectional mixing pile technology is adopted, and the following defects are often existed in the existing bidirectional mixing pile equipment: all or part of the power system is arranged at the top of the drill rod, the gravity center of the pile machine is higher, the guidance of the drill rod is poor, the pile machine can overturn in the construction process, and the safety is poor; the inner drill rod and the outer drill rod rotate simultaneously and need to be longer than the designed pile length of the mixing pile, the power loss is large in the rotating process, and pipe blockage is easy to occur; construction is difficult in places containing large stones, and the drill bit and the stirring blade are easy to damage and not easy to replace; the stirring blade has weak space stirring capability and poor pile forming quality.

Disclosure of Invention

The invention aims to provide a power-down bidirectional mixing pile machine, which aims to overcome the defects that in the bidirectional mixing pile equipment in the prior art, all or part of a power system is arranged at the top of a drill rod, the gravity center of the pile machine is higher, the guide performance of the drill rod is poor, the pile machine can topple in the construction process, and the safety is poor.

A bidirectional stirring pile machine with a lower power comprises a pile machine bearing platform, a press-pull pile, a guide rod, a bidirectional stirring drill bit and a power system, wherein the guide rod is arranged in the middle of the pile machine bearing platform and penetrates downwards; the power system is arranged on a pile bearing platform of the pile machine and provides power for the whole pile machine.

Preferably, the bidirectional stirring drill bit sequentially comprises a first sleeve, a second sleeve and a third sleeve from top to bottom, the bidirectional stirring drill bit sequentially comprises the first sleeve, the second sleeve and the third sleeve from top to bottom, a first hydraulic motor, a second hydraulic motor, an inner transmission shaft and an outer transmission shaft are arranged in the first sleeve, the outer transmission shaft is connected with the second sleeve, an inner transmission shaft is arranged in the outer transmission shaft, and the inner transmission shaft is connected with the third sleeve; the output ends of the first hydraulic motor and the second hydraulic motor are provided with driving gears, the outer transmission shaft and the inner transmission shaft are sleeved with driven gears, and the driving gear on the first hydraulic motor is connected with the driven gears on the outer transmission shaft through a transmission chain; and a driving gear on the second hydraulic motor is connected with a driven gear on the inner transmission shaft through a transmission chain.

Preferably, the first hydraulic motor and the second hydraulic motor are connected with the power system through hydraulic pipes, and the hydraulic pipes are arranged in the guide rods.

Preferably, the second sleeve is externally provided with a first helical blade.

Preferably, a guniting pipe penetrates through the guide rod, and the guniting pipe is provided with a grout inlet.

Preferably, a second spiral blade is arranged outside the third sleeve.

Preferably, the second spiral blade is provided with a slurry spraying port, and the slurry spraying port is connected with the slurry inlet.

Preferably, the second helical blade is provided with a detachable blade.

Preferably, the pressure-pulling pile is provided with a hydraulic gear clamp and a hydraulic cylinder, and the guide rod is provided with a tooth socket matched with the hydraulic gear clamp.

Preferably, the bottom of the guide rod is provided with a flange, and the bidirectional stirring drill bit is connected with the bottom of the guide rod through the flange.

Compared with the prior art, the invention has the following beneficial effects: the power system is completely arranged downwards, so that the center of the pile machine is greatly reduced, the pile machine is prevented from overturning in the construction process, and the construction safety and stability are improved; two groups of pile pressing and pulling equipment work simultaneously to ensure constant-speed drilling and perpendicularity of a pile body; the guide rod replaces the fixed-length inner and outer drill rods of the traditional mixing pile machine, and the hydraulic motor and the inner and outer drill rods are integrated in the bidirectional mixing drill bit, so that the kinetic energy dissipation during the rotation of the drill rods is reduced, and the inner and outer drill rods are not easy to block pipes; the replaceable tooth piece is used for drilling, the spiral blade only plays a role in stirring, the tooth piece is easy to replace, and the drilling capability is stronger; the spiral blade has stronger space stirring capability, and the pile body is uniformly stirred, so that the pile forming quality is high.

Drawings

FIG. 1 is an overall schematic view of a bi-directional mixing pile machine of the present invention;

FIG. 2 is a schematic view of a guide bar;

fig. 3 is a structural view of a bidirectional stirring drill.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-3, a power-down bidirectional mixing pile machine is disclosed, which comprises a pile machine bearing platform 1, pile pressing and pulling 2, a guide rod 3, a bidirectional mixing drill bit 4 and a power system 5, wherein the guide rod 3 is arranged in the middle of the pile machine bearing platform 1 and penetrates downwards, the pile pressing and pulling 2 is respectively arranged on two sides of the guide rod 3, the bidirectional mixing drill bit 4 is arranged at the bottom of the guide rod 3, the gravity center of the pile machine is lowered, the pile machine is prevented from overturning in the construction process, and the safety of the mixing pile machine in use is improved; a guniting pipe 7 penetrates through the guide rod 3; the guniting pipe 7 is provided with a guniting port 410, the guniting port 410 is connected with a guniting port 411 on a second spiral blade 412 outside a third sleeve 409, and cement grout is uniformly sprayed out of the guniting port; and the power system 5 is arranged on the pile machine bearing platform 1 and controls the power of the whole pile machine.

In this embodiment, the bidirectional stirring drill bit 4 sequentially includes a first sleeve 403, a second sleeve 407, and a third sleeve 409 from top to bottom, the first sleeve 403 does not rotate, a first hydraulic motor 401, a second hydraulic motor 402, an inner transmission shaft 404, and an outer transmission shaft 405 are disposed in the first sleeve 403, the outer transmission shaft 405 is connected to the second sleeve 407, the outer transmission shaft 405 is disposed in the inner transmission shaft 404, and the inner transmission shaft 404 is connected to the third sleeve 409; the output ends of the first hydraulic motor 401 and the second hydraulic motor 402 are both provided with driving gears, the outer transmission shaft 405 and the inner transmission shaft 404 are both sleeved with driven gears, and the driving gear on the first hydraulic motor 401 is connected with the driven gears on the outer transmission shaft 405 through a transmission chain 406; the driving gear on the second hydraulic motor 402 is connected with the driven gear on the inner transmission shaft through the transmission chain 406 to rotate in the positive or negative direction, so that bidirectional stirring is realized, kinetic energy dissipation during rotation of the drill rod is reduced, and the inner drill rod and the outer drill rod are not easy to block pipes; a driving gear of an output shaft of the first hydraulic motor 401 and a driven gear of an external transmission shaft are driven through a transmission rack 406, and the external transmission shaft is connected with a second sleeve 407 through a bolt 405, so that the second sleeve 407 rotates in a positive direction or a negative direction; gears connected with the first hydraulic motor 401 and the second motor 402 are connected through a transmission chain 406, direct friction between the gears is avoided, replacement cost is high, the cost is low due to the fact that the chains are replaced, and cost is saved.

In order to realize weak space stirring capability and poor pile forming quality of the stirring blade in the embodiment, stirring is performed in two directions by bidirectional rotation, the rotating blade is divided into two parts, a first spiral blade 408 is arranged outside the second sleeve 407, and a second spiral blade 412 is arranged outside the third sleeve 409; rotating in the positive or negative direction; realize two-way stirring, kinetic energy dissipation when reducing the drilling rod and rotating, the difficult stifled pipe phenomenon that appears of inside and outside drilling rod simultaneously.

In order to improve the drilling capacity and the space stirring capacity of the drill bit and reduce the abrasion of the spiral blade 412, the second spiral blade 412 is provided with the detachable tooth piece 413, the detachable tooth piece 413 is convenient to replace after being abraded, and the universality is improved.

In order to enable the pressure-pulling pile 2 and the guide rod 3 to be more stably guided, the pressure-pulling pile 2 is provided with two groups of hydraulic gear clamps 201 and two groups of hydraulic cylinders 202, the guide rod 3 is provided with tooth grooves matched with the hydraulic gear clamps 201, the power system 5 is started, the hydraulic cylinders 202 transmit hydraulic oil through hydraulic pipes 6 arranged in the guide rod 3 to drive the hydraulic gear clamps 201 to rotate, so that the guide rod 3 moves up and down, the hydraulic gear clamps 201 can ensure that the guide rod 3 and the bidirectional stirring drill bit 4 move up and down at a constant speed, and the verticality of a pile body is controlled;

in this embodiment, the bottom of the guide rod 3 is provided with a flange 301, and the bidirectional stirring drill 4 is connected with the bottom of the guide rod 3 through the flange 301. The advantages of the connection through the flange are as follows: the splicing is simple, and the stability of the connection of the guide rod and the drill bit is ensured.

The working principle is as follows: the power system 5 drives the first hydraulic motor 401 and the second hydraulic motor 402 to work through the hydraulic pipe 6. The first hydraulic motor 401 drives the outer transmission shaft 405 to rotate through a transmission gear, and the second sleeve 407 is in flange connection with the outer transmission shaft 405 and rotates simultaneously; the second hydraulic motor 402 drives the inner transmission shaft 404 to rotate through the transmission gear, the rotation direction is opposite to that of the second sleeve 407, and the third sleeve 409 is connected with the inner transmission shaft 404 in a flange mode and rotates simultaneously. The second sleeve 407 and the third sleeve 409 can rotate in two directions.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. a two-way stirring pile driver placed under power, is characterized in that, comprises pile driver cap, pressing pile, guide rod, two-way stirring drill bit, power system, and described guide rod is arranged in the middle of pile driver cap, and Passing down downward, the two sides of the guide rod are installed with pressing and pulling piles for clamping the guide rod and driving the guide rod to move up and down, the two-way stirring bit is set at the bottom of the guide rod; On the platform, it provides power for the whole pile driver; the two-way stirring bit includes a first casing, a second casing, and a third casing in sequence from top to bottom, and the first casing is provided with a first hydraulic motor, a third casing Two hydraulic motors, an inner transmission shaft and an outer transmission shaft, the outer transmission shaft is connected with the second sleeve, the outer transmission shaft is provided with an inner transmission shaft, and the inner transmission shaft is connected with the third sleeve; the The output ends of the first hydraulic motor and the second hydraulic motor are both provided with driving gears, the outer transmission shaft and the inner transmission shaft are both sleeved with driven gears, and the driving gears on the first hydraulic motor are connected to the outer transmission through the transmission chain. The driven gear on the shaft is connected; the driving gear on the second hydraulic motor is connected with the driven gear on the inner drive shaft through a transmission chain.

2 . The power-mounted two-way pile mixer according to claim 1 , wherein the first hydraulic motor and the second hydraulic motor are connected to the power system through a hydraulic pipe, and the hydraulic pipe is arranged in the guide rod. 3 . .

3 . The power-mounted two-way mixing pile driver according to claim 1 , wherein a first helical blade is provided outside the second casing. 4 .

4 . The power-mounted two-way stirring pile driver according to claim 1 , wherein a shotcrete pipe runs through the guide rod, and the shotcrete pipe is provided with a grout inlet. 5 .

5 . The power-mounted two-way mixing pile driver according to claim 4 , wherein a second helical blade is provided outside the third sleeve. 6 .

6 . The power-mounted two-way stirring pile driver according to claim 5 , wherein the second helical blade is provided with a spray port, and the spray port is connected with the slurry inlet. 7 .

7 . The powered two-way pile mixer according to claim 6 , wherein the second helical blade is provided with a detachable tooth. 8 .