阅读说明：本技术 一种起桩器 (Pile lifter ) 是由 许剑 郑广晶 张炜 应宏伟 葛健玮 黄俊鹏 蒋洪青 汤春俊 徐志勇 张国纲 汤良 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种起桩器,包括支架、液压油缸以及夹具,所述液压油缸包括第一油缸以及第二油缸,所述第一油缸与第二油缸之间连通,所述夹具包括与第二油缸的输出机构连接的起桩夹以及避免钢钎回落的单向夹,夹具下方设有用于敲击钢钎的敲击机构。(The invention discloses a pile lifter which comprises a support, a hydraulic oil cylinder and a clamp, wherein the hydraulic oil cylinder comprises a first oil cylinder and a second oil cylinder, the first oil cylinder and the second oil cylinder are communicated, the clamp comprises a pile lifting clamp connected with an output mechanism of the second oil cylinder and a one-way clamp for preventing a steel chisel from falling back, and a knocking mechanism for knocking the steel chisel is arranged below the clamp.)

1. A pile lifter comprises a support, a hydraulic oil cylinder and a clamp, and is characterized in that the hydraulic oil cylinder comprises a first oil cylinder and a second oil cylinder, the first oil cylinder is communicated with the second oil cylinder, the clamp comprises a pile lifting clamp connected with an output mechanism of the second oil cylinder and a one-way clamp for preventing a steel chisel from falling back, a knocking mechanism for knocking the steel chisel is arranged below the clamp, the knocking mechanism comprises a shifting wheel, a plurality of shifting rods arranged on the shifting wheel, a knocking rod for shifting the shifting rods, a knocking disc and a hydraulic motor for driving the knocking disc to rotate, through holes for penetrating the steel chisel are respectively arranged in the middle of the shifting wheel and the middle of the knocking disc, the shifting rods are hinged with the shifting wheels, the knocking rod is fixedly connected with the knocking disc, a base plate for supporting the knocking disc is arranged at the lower end of the knocking disc, the knocking disc is rotatably connected with the base plate, the hydraulic motor is respectively communicated with the first oil cylinder and the, the knocking disc is in transmission connection with the hydraulic motor, and the base plate and the shifting wheel are respectively fixedly connected with the support.

2. The pile driver as claimed in claim 1, wherein the pile driver comprises a first sleeve connected to the output mechanism of the second cylinder, two first sliding blocks and two second sliding blocks for fixing the drill rod, the two first sliding blocks are respectively arranged on the inner wall of the first sleeve, the first sliding blocks are fixedly connected with the first sleeve, the two second sliding blocks are respectively connected with the corresponding first sliding blocks in a sliding mode through sliding grooves, an inclined surface structure for changing the distance between the two second sliding blocks is arranged between the second sliding blocks and the first sliding blocks, and a first spring for providing pre-tightening force is arranged between the two second sliding blocks.

3. The pile driver as claimed in claim 1, wherein the one-way clamp includes a second sleeve fixedly connected to the support, two third sliding blocks and two fourth sliding blocks for fixing the drill rod, the two third sliding blocks are respectively disposed on the inner wall of the second sleeve, the third sliding blocks are fixedly connected to the second sleeve, the two fourth sliding blocks are respectively slidably connected to the corresponding third sliding blocks through sliding grooves, a slope structure for changing the distance between the two fourth sliding blocks is disposed between the fourth sliding blocks and the third sliding blocks, and a second spring for providing a pre-tightening force is disposed between the two fourth sliding blocks.

4. A pile driver according to claim 1, wherein the plurality of drivers are arranged circumferentially and uniformly along the thumb wheel.

5. The pile driver according to claim 1, wherein two third springs are disposed between the shift lever and the shift wheel, and the two third springs are disposed on both sides of the shift lever.

6. The pile driver as claimed in claim 1, wherein return springs for returning are provided between the output mechanisms of the first and second cylinders and the cylinder body, respectively.

7. A pile driver according to any one of claims 1 to 6, wherein a thrust bearing is provided between the striking plate and the base plate, and the striking plate and the base plate are rotatably connected by the thrust bearing.

Technical Field

The invention relates to the field of building construction, in particular to a pile lifter.

Background

In various construction processes of erecting a tower, laying a circuit, maintaining and the like of an electric power system, various piling operations are needed, a steel chisel with the diameter of 48mm and the length of 1.45m needs to be driven into the ground, geology can be soil, rocks and the like, and a gasoline pile driver is generally adopted to drive the steel chisel into the ground through continuous vibration. The problem is that the steel drill rod is easy to remove and difficult to take out, and the steel drill rod can be pulled out of the ground after being loosened by continuously beating the steel drill rod by a heavy hammer. The labor intensity of the operation is high, and the lifting is difficult. The existing pile-pulling equipment, for example, a "hydraulic pile-pulling machine" disclosed in chinese patent literature, has a publication number CN204418180U, and includes a hydraulic machine body, a lifting support, a lifting cylinder, a lifting guide rail, a lifting arm and a steel pipe, wherein the lifting support, the lifting cylinder and the lifting guide rail are all arranged on the hydraulic machine body, the lifting arm is connected with a hammer follower frame, a connection support and a hydraulic fixing frame are fixed on one side of the hammer follower frame, the hydraulic hammer is arranged in the hydraulic fixing frame, the lower end of the connection support is hinged with a connecting plate near one third of the connecting ring, and the lower end of the connecting ring is connected with a taper rod and a taper sleeve; and the hydraulic machine body is also provided with a lighting lamp. Such pile lifting equipment often relies on the rising mechanism to extract the drill steel etc. and need strike the drill steel by the manual work at the pulling in-process, makes its and earth separation, and its efficiency is lower.

Disclosure of Invention

The invention provides a pile extractor, which aims to solve the problem that the existing pile extractor can not realize automatic knocking of a steel chisel in the process of pulling the steel chisel to separate a rod body from soil, and can knock the steel chisel by a machine in the process of pulling the steel chisel to enable the steel chisel to be pulled out more easily.

In order to achieve the purpose, the invention adopts the following technical scheme:

a pile lifter comprises a support, a hydraulic oil cylinder and a clamp, wherein the hydraulic oil cylinder comprises a first oil cylinder and a second oil cylinder, the first oil cylinder is communicated with the second oil cylinder, the clamp comprises a pile lifting clamp connected with an output mechanism of the second oil cylinder and a one-way clamp for preventing a steel chisel from falling back, a knocking mechanism for knocking the steel chisel is arranged below the clamp, the knocking mechanism comprises a shifting wheel, a plurality of shifting rods arranged on the shifting wheel, a knocking rod for shifting the shifting rods, a knocking disc and a hydraulic motor for driving the knocking disc to rotate, through holes for penetrating the steel chisel are respectively arranged in the middle of the shifting wheel and the middle of the knocking disc, the shifting rods are hinged with the shifting wheels, the knocking rod is fixedly connected with the knocking disc, a base plate for supporting the knocking disc is arranged at the lower end of the knocking disc, the knocking disc is rotatably connected with the base plate, the hydraulic motor is respectively communicated with the first oil cylinder and the second oil cylinder, the knocking disc is in transmission connection with the hydraulic motor, and the base plate and the shifting wheel are respectively fixedly connected with the support. In various construction processes of erecting a tower, laying a circuit, maintaining and the like of an electric power system, various piling operations are needed, a steel chisel with the diameter of 48mm and the length of 1.45m needs to be driven into the ground, geology can be soil, rocks and the like, and a gasoline pile driver is generally adopted to drive the steel chisel into the ground through continuous vibration. The problem is that the steel drill rod is easy to remove and difficult to take out, and the steel drill rod can be pulled out of the ground after being loosened by continuously beating the steel drill rod by a heavy hammer. The labor intensity of the operation is high, and the lifting is difficult. Consequently this scheme has integrateed to extract the drill rod and has rocked the mechanism that the drill rod made its and earth separation on every side, utilizes hydraulic cylinder's drive for it is more convenient to extract of drill rod. The pile-lifting clamp has the advantages that the inclined plane between the first sliding block and the second sliding block is utilized to drive the steel rod to lift when the pile-lifting clamp lifts, the pile-lifting clamp can be separated from the steel rod temporarily when the output mechanism of the second oil cylinder descends, and the steel rod is locked in one direction by the one-way clamp to maintain the lifting height of the previous section and does not fall under the influence of gravity along with the separation of the pile-lifting clamp. The knocking mechanism is used for enabling the steel drill to be stripped from soil on the inner wall of the hole through shaking of the steel drill, and therefore the steel drill can be pulled out more easily. Under hydraulic motor's drive, strike the dish and rotate round the drill rod on the base plate, strike the pole of knocking on the dish and rotate thereupon, strike the pole when the process driving lever, stir the driving lever and make the other end of driving lever strike the drill rod, at the in-process of strikeing, the pole body of drill rod takes place to vibrate, at the vibration in-process, the drill rod is separated with the earth in the hole.

Preferably, the pile driving clamp comprises a first sleeve connected with an output mechanism of the second oil cylinder, two first sliding blocks and two second sliding blocks for fixing the drill steel, the two first sliding blocks and the two second sliding blocks are respectively arranged on the inner wall of the first sleeve, the first sliding blocks are fixedly connected with the first sleeve, the two second sliding blocks are respectively connected with the corresponding first sliding blocks in a sliding mode through sliding grooves, an inclined surface structure used for changing the distance between the two second sliding blocks is arranged between the second sliding blocks and the first sliding blocks, and a first spring used for providing pre-tightening force is arranged between the two second sliding blocks. The inclined plane of the first sliding block is matched with the second sliding block, when the first sliding block rises along with the sleeve, the second sliding block is extruded to the steel rod direction under the extrusion of the inclined plane, and the steel rod is clamped tightly by the two second sliding blocks, so that the steel rod rises along with the pile lifting clamp under the action of friction force. When the pile lifting clamp descends, the second sliding blocks are gradually far away from the steel drill rod along with the inclined surface, the pressure of the two second sliding blocks for clamping the steel drill rod is not enough to provide enough friction force, and the pile lifting clamp is separated from the steel drill rod.

Preferably, the one-way clip comprises a second sleeve fixedly connected with the bracket, a third slider and a fourth slider for fixing the drill rod, the number of the third slider and the number of the fourth slider are two respectively, the two third sliders are arranged on the inner wall of the second sleeve respectively, the third slider and the second sleeve are fixedly connected, the two fourth sliders are respectively connected with the corresponding third sliders in a sliding mode through sliding grooves, an inclined surface structure for changing the distance between the two fourth sliders is arranged between the fourth slider and the third slider, and a second spring for providing pre-tightening force is arranged between the two fourth sliders. The one-way locking function of the one-way clamp enables the steel rod to rise and cannot fall, so that when the output mechanism of the second oil cylinder falls, the steel rod can maintain the rising height of the previous stage and cannot fall back.

Preferably, the plurality of shift levers are uniformly arranged along the circumferential direction of the shift wheel. The driving lever is equidistantly arranged on the shifting wheel, and when the knocking rod rotates for one circle along with the knocking wheel, the steel rod is knocked in all directions, so that the effect of separating the steel rod from the soil is more obvious. Meanwhile, when the steel chisel is uniformly knocked in all directions, the inner wall of the hole around the steel chisel is separated from the chisel body due to self vibration, the inner diameter of the hole is enlarged, and the steel chisel is more easily pulled out of the hole.

Preferably, two third springs are arranged between the shifting lever and the shifting wheel, and the two third springs are respectively positioned on two sides of the shifting lever. The two third springs respectively pull the shifting lever from two directions, so that the knocking rod rotates along two directions along with the knocking disc and knocks the shifting lever, and the shifting lever can normally reset.

Preferably, return springs for returning are respectively arranged between the output mechanisms of the first oil cylinder and the second oil cylinder and the cylinder body. The return spring is used for enabling the first oil cylinder to be pressed into the second oil cylinder to enable hydraulic oil to flow back, and the second oil cylinder output mechanism is ready to ascend next time.

Preferably, a thrust bearing is arranged between the knocking disc and the base plate, and the knocking disc and the base plate are rotatably connected through the thrust bearing. Reduce the friction between the base plate and the knocking disc when rotating.

Therefore, the invention has the following beneficial effects: (1) the rod body of the drill rod can be knocked mechanically in the process of pulling the drill rod, so that the rod body of the drill rod is separated from soil, and the drill rod is convenient to pull out; (2) the rod body of the drill rod can be knocked in the circumferential direction, so that the inner wall of the hole where the drill rod is located is enlarged, and the drill rod is convenient to pull out.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a top sectional view of the pile driving clamp according to the invention.

Fig. 3 is a top cross-sectional view of the one-way clutch of the present invention.

Fig. 4 is a schematic top view of the striking mechanism of the present invention.

Fig. 5 is a schematic elevation view of the striking mechanism of the present invention.

In the figure: 1. the device comprises a support 2, a one-way clamp 3, a steel chisel 4, a pile lifting clamp 5, a base plate 6, a knocking mechanism 7, a first oil cylinder 8, a return spring 9, a second oil cylinder 10, a first sleeve 11, a first slide block 12, a second slide block 13, a first spring 14, a second sleeve 15, a third slide block 16, a fourth slide block 17, a second spring 18, a knocking disc 19, a knocking rod 20, a driving disc 21, a third spring 22, a driving lever 23, a hydraulic motor 24 and a liquid pipeline.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.