阅读说明：本技术 一种割桩机的工作方法 (Working method of pile cutting machine ) 是由 陈懿 姚典 王江 谷文平 陈楚苗 王海江 韦淋睦 安万平 林云志 李国昌 张福江 于 2020-11-16 设计创作，主要内容包括：本发明提供一种割桩机的工作方法,包括首先吊装割桩机并将割桩机伸入到钢桩内,固定割桩机,然后启动割桩件,然后让割桩件向钢桩摆动并切割钢桩达到需要的缺口,然后收回割桩件,然后让割桩件回转摆动25°,然后启动割桩件切割钢桩,收回割桩件并检测是否将钢桩切割完,如没有切割完,重复上述步骤直到钢桩切割完成,最后停止液压系统接着讲割桩机和被切割的钢桩吊出；该工作方法,对割桩机固定可靠,割桩彻底且效率高。(The invention provides a working method of a pile cutting machine, which comprises the steps of firstly hoisting the pile cutting machine, extending the pile cutting machine into a steel pile, fixing the pile cutting machine, then starting the pile cutting part, swinging the pile cutting part towards the steel pile, cutting the steel pile to reach a required gap, then withdrawing the pile cutting part, then enabling the pile cutting part to swing in a rotating way for 25 degrees, then starting the pile cutting part to cut the steel pile, withdrawing the pile cutting part, detecting whether the steel pile is cut completely or not, if not, repeating the steps until the steel pile is cut completely, and finally stopping a hydraulic system, then lifting the pile cutting machine and the cut steel pile out; the working method has the advantages of reliable fixation of the pile cutting machine, thorough pile cutting and high efficiency.)

1. A working method of a pile cutting machine is characterized by comprising the following steps:

(1) connecting the pile cutting machine with a hanging beam of a crane, and moving the pile cutting machine into the steel pile by the crane; the steel pile is fixed with a hanging beam of a crane; then starting the pile cutting detection device and the rotation detection device;

(2) a hydraulic pump in the starting hydraulic system and a two-position four-way electromagnetic valve for controlling the starting hydraulic system are electrified, hydraulic oil of the hydraulic pump is not discharged into an oil tank from a direct-guide overflow valve of the starting hydraulic system, and the hydraulic oil in the oil tank is pumped into a regulating hydraulic system, a rotary driving hydraulic system, a pile cutting extending hydraulic system and a pile cutting driving hydraulic system in the hydraulic system under the action of the hydraulic pump;

(3) controlling the YV10 end of a regulating three-position four-way electromagnetic valve in the regulating hydraulic system to be electrified, driving a regulating hydraulic oil cylinder arranged on the pile cutting machine by hydraulic oil through the regulating three-position four-way electromagnetic valve and a regulating hydraulic control one-way valve, and simultaneously filling oil into an energy accumulator; when the adjusting hydraulic cylinder is contacted with the steel pile, the pile cutting machine is stably fixed in the steel pile under the action of the adjusting hydraulic cylinder and the fixed supporting leg on the pile cutting machine; then controlling and adjusting the three-position four-way electromagnetic valve to reset to a middle position;

controlling the YV22 end of a pile cutting three-position four-way electromagnetic valve in a pile cutting driving hydraulic system to be electrified, driving a pile cutting driving hydraulic motor by hydraulic oil of a hydraulic pump through the pile cutting three-position four-way electromagnetic valve in the pile cutting driving hydraulic system, and driving a pile cutting part arranged on the pile cutting driving hydraulic motor to rotate by the pile cutting driving hydraulic motor arranged on the pile cutting machine;

controlling the cutting pile to extend out of a YV12 end of an extending three-position four-way electromagnetic valve in the hydraulic system to be electrified, and driving the cutting pile to extend out of a hydraulic oil cylinder by hydraulic oil of a hydraulic pump through the extending three-position four-way electromagnetic valve and an extending hydraulic control one-way valve in the cutting pile extending out of the hydraulic system; the pile cutting extension hydraulic oil cylinder drives the pile cutting part to extend out of a pile cutting support of the pile cutting machine, and when the pile cutting extension hydraulic oil cylinder extends out to the maximum value, the three-position four-way electromagnetic valve is extended out and reset to the middle position; in the process, when the pile cutting part touches the steel pile, the pile cutting part cuts the steel pile; the pile cutting detection device detects the steel pile in real time, and step (6) is carried out according with the detection result;

(6) controlling the YV13 end extending out of the three-position four-way electromagnetic valve to be electrified; the pile cutting part is driven to retract the pile cutting support by the pile cutting extending hydraulic oil cylinder, and the three-position four-way electromagnetic valve is extended to reset to a middle position after the pile cutting part is retracted to an initial position; then starting a YV20 end of a rotary three-position four-way electromagnetic valve in the rotary driving hydraulic system to be electrified, and driving a rotary driving motor by hydraulic oil through the rotary three-position four-way electromagnetic valve and a rotary balance valve in the rotary driving hydraulic system; the normally closed brake does not brake the rotary driving motor, and the rotary driving motor drives the pile cutting mechanism to rotate for 25 degrees; when the pile cutting mechanism rotates by 25 degrees, the rotary three-position four-way electromagnetic valve is reset to the middle position, the normally closed brake brakes the rotary driving motor, and the rotary driving motor stops;

(7) performing steps (5) and (6);

(8) judging whether pile cutting is finished or not, and repeating the steps (5) and (6) if the pile cutting is not finished until the rotary driving motor drives the pile cutting mechanism to rotate 360 degrees and the steel pile cutting is finished; carrying out step (9);

(9) controlling the pile cutting three-position four-way electromagnetic valve to reset to a middle position, and driving the hydraulic motor to stop rotating by the pile cutting; controlling the end extending out of the three-position four-way electromagnetic valve YV13 to be electrified, and extending the pile cutting part out of the hydraulic oil cylinder to drive the pile cutting part to retract the pile cutting support; after the pile cutting part is retracted to the initial position; the three-position four-way electromagnetic valve is extended to reset to the middle position; then starting and adjusting the YV11 end of the three-position four-way electromagnetic valve to be electrified; the hydraulic oil cylinder is adjusted to retract, and after the hydraulic oil cylinder is adjusted to retract to the initial position, the three-position four-way electromagnetic valve is adjusted to reset to the middle position; and then the two-position four-way electromagnetic valve is de-energized, the hydraulic oil returns to the oil tank from the direct-guide overflow valve, then the pile cutting detection device and the rotation detection device are closed, and the crane moves the pile cutting machine and the cut steel pile away.

2. The working method of the pile cutter as claimed in claim 1, wherein: the pile cutting mechanism comprises a pile cutting support, a pile cutting driving hydraulic motor arranged in the pile cutting support, a pile cutting extending hydraulic oil cylinder, a pile cutting connecting device and a pile cutting part; the rotary driving motor drives the pile cutting support to rotate.

3. The working method of the pile cutter as claimed in claim 2, wherein: the step (5) is specifically as follows: the pile cutting extending hydraulic oil cylinder drives the pile cutting part to extend out of the pile cutting support, and the pile cutting part cuts the steel pile; and (5) detecting the steel pile in real time by the pile cutting detection device, and performing step (6) according with the detection result.

4. The working method of the pile cutter as claimed in claim 2, wherein: the step 6) is specifically as follows: the rotation detection device detects that the pile cutting mechanism rotates 25 degrees, the rotation detection device sends a signal to the rotation mechanism, the rotation three-position four-way electromagnetic valve is started to reset to a middle position, the normally closed brake brakes the rotation driving motor, and the rotation driving motor stops.

5. The working method of the pile cutter as claimed in claim 3, wherein: in the step (5), the coincidence detection result is as follows: the pile cutting element penetrates the steel pile and has a cut of the steel pile greater than 25 ° in the circumferential direction.

Technical Field

The invention relates to the field of pile foundation cutting, in particular to a working method of a pile cutting machine.

Background

With the urbanization and industrialization development of China, the demands of domestic water and industrial water are increasing day by day, different types of diversion projects are being drawn up, expanded and newly built around the country, and in order to ensure the quality of water quality, reduce the water treatment cost and reduce the subsequent operation cost, the water intake head is expanding towards the middle of a river or a lake. The water intake head after expansion is mostly positioned at the position with water depth, flow urgency and wide water area; the working procedure of driving the steel pile into the water intake head and cutting the steel pipe pile underwater is carried out in the water intake head construction process; the existing construction and cutting of the steel pipe pile are not in place, manual multiple launching operation is needed, pile cutting efficiency is not high, and the problems that whether cutting is completed or not and procedures are complicated are not convenient to judge are solved.

An underwater pile cutting device is disclosed in Chinese patent application No. 201921149039.4, publication No. 2020.5.5; the underwater pile cutting device comprises an operation platform arranged on the water surface; a transverse bracket and a vertical bracket are vertically arranged on the operating platform; the vertical support is a lifting support, a driving wheel is arranged on the vertical support, and the driving wheel is connected with a driving motor for driving the driving wheel; the transverse bracket is provided with a guide wheel set, the bottom side of the transverse bracket is connected with a support plate, and the support plate is provided with a driven wheel set comprising a first driven wheel and a second driven wheel.

But the diamond wire saw of the pile cutting device is arranged on the outer wall of the pile foundation to be cut in a holding mode, and the diamond wire saw is driven by the driving mechanism to cut the pile foundation to be cut; the diamond wire saw can only cut the pile foundation to be cut along one direction; when cutting is carried out, a large friction force is generated between the diamond wire saw and a pile foundation to be cut, so that the cutting efficiency is low, and the service life of the diamond wire saw is short; meanwhile, the diamond wire saw is of a flexible structure, and the cutting direction of the diamond wire saw is easy to change up and down when the diamond wire saw is used for cutting the pile foundation to be cut; the plane can not be accurately cut, and the cutting effect is poor; thus, the pile cutting device is not suitable for working scenes with precision requirements on cutting surfaces; meanwhile, when cutting is carried out, the force which is applied to the diamond wire saw to approach the operating platform is used, so that the diamond wire saw is in friction with the pile foundation to be cut, and the diamond wire saw is used for cutting the pile foundation to be cut; the pile cutting device can only give unidirectional force to the diamond rope saw, when the diamond rope saw cuts the pile foundation to be cut, the diamond rope saw cannot be separated from the pile foundation to be cut, only after the diamond rope saw finishes cutting the pile foundation to be cut, the diamond rope saw can be separated from the pile foundation to be cut, once an error cutting point is selected, the error cutting point cannot be reselected in time, and only after one-time cutting is finished, correct cutting point cutting is selected; thus, the control effect is poor; while this document does not disclose a hydraulic system.

Disclosure of Invention

The invention provides a working method of a pile cutting machine, which has high pile cutting efficiency.

In order to achieve the purpose, the technical scheme of the invention is as follows: a working method of a pile cutting machine comprises the following steps:

(1) connecting the pile cutting machine with a hanging beam of a crane, and moving the pile cutting machine into the steel pile by the crane; the steel pile is fixed with a hanging beam of a crane; then starting the pile cutting detection device and the rotation detection device;

(2) a hydraulic pump in the starting hydraulic system and a two-position four-way electromagnetic valve for controlling the starting hydraulic system are electrified, hydraulic oil of the hydraulic pump is not discharged into an oil tank from a direct-guide overflow valve of the starting hydraulic system, and the hydraulic oil in the oil tank is pumped into a regulating hydraulic system, a rotary driving hydraulic system, a pile cutting extending hydraulic system and a pile cutting driving hydraulic system in the hydraulic system under the action of the hydraulic pump;

(3) controlling the YV10 end of a regulating three-position four-way electromagnetic valve in the regulating hydraulic system to be electrified, driving a regulating hydraulic oil cylinder arranged on the pile cutting machine by hydraulic oil through the regulating three-position four-way electromagnetic valve and a regulating hydraulic control one-way valve, and simultaneously filling oil into an energy accumulator; when the adjusting hydraulic cylinder is contacted with the steel pile, the pile cutting machine is stably fixed in the steel pile under the action of the adjusting hydraulic cylinder and the fixed supporting leg on the pile cutting machine; then controlling and adjusting the three-position four-way electromagnetic valve to reset to a middle position;

(4) controlling the YV22 end of a pile cutting three-position four-way electromagnetic valve in a pile cutting driving hydraulic system to be electrified, driving a pile cutting driving hydraulic motor by hydraulic oil of a hydraulic pump through the pile cutting three-position four-way electromagnetic valve in the pile cutting driving hydraulic system, and driving a pile cutting part arranged on the pile cutting driving hydraulic motor to rotate by the pile cutting driving hydraulic motor arranged on a pile cutting machine;

(5) controlling the cutting pile to extend out of a YV12 end of an extending three-position four-way electromagnetic valve in the hydraulic system to be electrified, and driving the cutting pile to extend out of a hydraulic oil cylinder by hydraulic oil of a hydraulic pump through the extending three-position four-way electromagnetic valve and an extending hydraulic control one-way valve in the cutting pile extending out of the hydraulic system; the pile cutting extension hydraulic oil cylinder drives the pile cutting part to extend out of a pile cutting support of the pile cutting machine, and when the pile cutting extension hydraulic oil cylinder extends out to the maximum value, the three-position four-way electromagnetic valve is extended out and reset to the middle position; in the process, when the pile cutting part touches the steel pile, the pile cutting part cuts the steel pile; the pile cutting detection device detects the steel pile in real time, and step (6) is carried out according with the detection result;

(6) controlling the YV13 end extending out of the three-position four-way electromagnetic valve to be electrified; the pile cutting part is driven to retract the pile cutting support by the pile cutting extending hydraulic oil cylinder, and the three-position four-way electromagnetic valve is extended to reset to a middle position after the pile cutting part is retracted to an initial position; then starting a YV20 end of a rotary three-position four-way electromagnetic valve in the rotary driving hydraulic system to be electrified, and driving a rotary driving motor by hydraulic oil through the rotary three-position four-way electromagnetic valve and a rotary balance valve in the rotary driving hydraulic system; the normally closed brake does not brake the rotary driving motor, and the rotary driving motor drives the pile cutting mechanism to rotate for 25 degrees; when the pile cutting mechanism rotates by 25 degrees, the rotary three-position four-way electromagnetic valve is reset to the middle position, the normally closed brake brakes the rotary driving motor, and the rotary driving motor stops.

(7) Conducting steps (5) and (6).

(8) Judging whether pile cutting is finished or not, and repeating the steps (5) and (6) if the pile cutting is not finished until the rotary driving motor drives the pile cutting mechanism to rotate 360 degrees and the steel pile cutting is finished; carrying out step (9);

(9) controlling the pile cutting three-position four-way electromagnetic valve to reset to a middle position, and driving the hydraulic motor to stop rotating by the pile cutting; controlling the end extending out of the three-position four-way electromagnetic valve YV13 to be electrified, and extending the pile cutting part out of the hydraulic oil cylinder to drive the pile cutting part to retract the pile cutting support; after the pile cutting part is retracted to the initial position; the three-position four-way electromagnetic valve is extended to reset to the middle position; then starting and adjusting the YV11 end of the three-position four-way electromagnetic valve to be electrified; the hydraulic oil cylinder is adjusted to retract, and after the hydraulic oil cylinder is adjusted to retract to the initial position, the three-position four-way electromagnetic valve is adjusted to reset to the middle position; and then the two-position four-way electromagnetic valve is de-energized, the hydraulic oil returns to the oil tank from the direct-guide overflow valve, then the pile cutting detection device and the rotation detection device are closed, and the crane moves the pile cutting machine and the cut steel pile away.

The pile cutting mechanism comprises a pile cutting support, a pile cutting driving hydraulic motor arranged in the pile cutting support, a pile cutting extending hydraulic oil cylinder, a pile cutting connecting device and a pile cutting part; the rotary driving motor drives the pile cutting support to rotate.

Further, the step (5) is specifically as follows: the pile cutting extending hydraulic oil cylinder drives the pile cutting part to extend out of the pile cutting support, and the pile cutting part cuts the steel pile; and (5) detecting the steel pile in real time by the pile cutting detection device, and performing step (6) according with the detection result.

Further, the step (6) is specifically as follows: the rotation detection device detects that the pile cutting mechanism rotates 25 degrees, the rotation detection device sends a signal to the rotation mechanism, the rotation three-position four-way electromagnetic valve is reset to a middle position, the normally closed brake brakes the rotation driving motor, and the rotation driving motor stops.

Further, in the step (5), the coincidence detection result is: the pile cutting element penetrates the steel pile and has a cut of the steel pile greater than 25 ° in the circumferential direction.

The working method is as above; the YV10 end of the three-position four-way electromagnetic valve is electrified by starting the two-position four-way electromagnetic valve and adjusting the three-position four-way electromagnetic valve; controlling the adjusting hydraulic oil cylinder to be far away from the outer wall of the machine base, and enabling the adjusting hydraulic oil cylinder and the fixed supporting leg to be fixedly contacted with the inner wall surface of the steel pile; then starting and adjusting the three-position four-way electromagnetic valve to reset to a middle position; the hydraulic oil cylinder is adjusted to realize that the fixing device is fixed in the steel pile under the action of the energy accumulator, so that the pile cutting is convenient.

Then starting the YV22 end of the pile cutting three-position four-way electromagnetic valve to be electrified; the pile cutting driving hydraulic motor drives the pile cutting part to rotate, and the YV12 end extending out of the three-position four-way electromagnetic valve is started to be electrified; the pile cutting extending hydraulic oil cylinder drives the pile cutting part to extend out of the pile cutting support to cut the steel pile; the pile cutting part is contacted with the steel pile in a rotating state and is cut; therefore, the pile cutting part can be prevented from being contacted with the steel pile and then rotated, so that the cutting opening on the steel pile clamps the pile cutting part, and the pile cutting part is damaged; meanwhile, when the cutting position of the steel pile is detected to be in accordance with the condition that the cutting position of the pile cutting part penetrates through the current steel pile, the next step is carried out, and then the YV20 end of the rotary three-position four-way electromagnetic valve is started to be electrified; the normally closed brake does not brake the rotary driving motor; the rotary driving motor rotates again; therefore, the pile cutting mechanism can be ensured to complete 360-degree rotation; separating the cut steel pile from the lower end of the steel pile; meanwhile, the rotation angle of the pile cutting mechanism is controlled to be 25 degrees each time; therefore, uncut parts between different cutting positions on the steel pile can be avoided, and low working efficiency caused by over-small rotation angle can be avoided; meanwhile, a normally closed brake is used; the rotary driving motor can not rotate continuously under the action of inertia after stopping; and finally, after the steel pile cutting is finished, the pile cutting machine and the cut steel pile are lifted away through a lifting beam of the crane.

Drawings

Fig. 1 is a schematic structural view of a pile cutting machine using the present invention.

Fig. 2 is a schematic structural diagram of a pile cutting mechanism of the pile cutting machine.

Fig. 3 is an enlarged view of a in fig. 1.

Fig. 4 is a distribution schematic diagram of a fixing device of a pile cutting machine using the invention.

Fig. 5 is a using state diagram of the pile cutting part for withdrawing the pile cutting support of the pile cutting machine.

Fig. 6 is a using state diagram of the pile cutting part extending out of the pile cutting support of the pile cutting machine.

FIG. 7 is a flow chart of the present invention.

Fig. 8 is a schematic diagram of a hydraulic system embodying the present invention.

Fig. 9 is an enlarged view of b in fig. 8.

Fig. 10 is an enlarged view of c in fig. 8.

Fig. 11 is an enlarged view of d in fig. 8.

Fig. 12 is an enlarged view of e in fig. 8.

Fig. 13 is an enlarged view of f in fig. 8.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-13; a pile cutter comprises a mechanical part and a hydraulic system, wherein the hydraulic system comprises a starting hydraulic system 61, a regulating hydraulic system 62, a rotary driving hydraulic system 63, a pile cutting extending hydraulic system 64 and a pile cutting driving hydraulic system 65 which are connected with an oil tank 66.

The mechanical part of the pile cutting machine comprises a machine base 1, a rotating mechanism 2, a pile cutting mechanism 3, a pile cutting detection device (not shown in the figure) and a rotating detection device (not shown in the figure).

Detecting whether the pile cutting part 35 cuts through the steel pile 5 by arranging a pile cutting detection device; detecting the rotation angle of the rotation mechanism 2 by arranging a rotation detection device; therefore, the pile cutting machine can be controlled according to the detection result. The outer wall surface of the machine base 1 is provided with a fixing device 4, the fixing device 4 is used for fixing the machine base 1, and the swing mechanism 2 is arranged in the machine base 1; the pile cutting mechanism 3 is positioned below the swing mechanism 2 and connected with the swing mechanism 2.

More than one group of fixing devices 4 are arranged; in the present embodiment, the fixing device 4 is provided with two sets; one group is arranged at the upper end of the outer wall surface of the machine base 1; the other group is arranged at the lower end of the outer wall surface of the machine base 1; thus, the fixing effect is good.

The group of fixing devices 4 comprises a fixing supporting foot 41 and an adjusting mechanism 42; more than one fixed supporting foot 41 and more than one adjusting mechanism 42 are respectively arranged; in the present embodiment, two fixed braces 41 are provided, and one adjusting mechanism 42 is provided. The fixed supporting feet 41 and the adjusting mechanisms 42 are uniformly distributed on the same horizontal height circumference of the outer wall surface of the machine base 1. The pile cutting machine can be fixed in the steel pile 5 through the fixing device 4 by arranging the fixed supporting feet 41; the pile cutter can be fixed in steel piles 5 of different sizes by arranging an adjusting mechanism 42.

The adjusting mechanism 42 comprises an adjusting supporting foot 421 and an adjusting hydraulic oil cylinder 422; the adjusting hydraulic oil cylinder 422 is arranged on the adjusting supporting foot 421, and the adjusting hydraulic oil cylinder 422 is transversely arranged outside the outer wall surface of the machine base 1. The pile cutting machine can be fixed in steel piles 5 with different sizes by adjusting the distance and the approach of a piston rod of the hydraulic oil cylinder 422 to the outer wall surface of the machine base 1; when the adjusting hydraulic oil cylinder 422 is far away from the outer wall surface of the base 1, the distance between the piston rod of the adjusting hydraulic oil cylinder 422 and the outer wall surface of the base 1 is increased; at this time, the pile cutting machine can be arranged in the steel pile 5 with larger inner diameter; when the piston rod of the hydraulic oil cylinder 422 is adjusted to be close to the outer wall surface of the base 1, the distance between the hydraulic oil cylinder 422 and the outer wall surface of the base 1 is adjusted to be reduced; the pile cutting machine can be arranged in the steel pile 5 with smaller inner diameter size.

The outer wall surface of the machine base 1 is provided with a sealing door 11 communicated with the inside. The rotary device 21 arranged in the machine base 1 is overhauled by arranging the sealing door 11; meanwhile, the sealing door 11 is arranged in a sealing manner, so that water is prevented from entering the machine base 1 under the action of pressure, and further the rotating device 21 is prevented from being damaged.

The slewing mechanism 2 comprises a slewing device 21 and a transmission device 22; the transmission device 22 is arranged on the inner wall surface of the machine base 1, and the rotating device 21 penetrates through the transmission device 22 and is arranged in the machine base 1; the rotating device 21 is matched with the transmission device 22; the swing device 21 includes a rotation shaft 211, a swing link 212, and a swing drive motor 213; in this embodiment, the rotary shaft 211 is mounted on the housing 1 through a bearing, the rotary shaft 211 penetrates the housing 1, and the swing driving motor 213 is a bidirectional hydraulic motor. The rotary connecting piece 212 is connected with the rotating shaft 211, and the rotary connecting piece 212 is a connecting plate; a rotary drive motor 213 is fixed to the rotary connector 212; the rotary drive motor 213 is provided with a drive member 214, and the drive member 214 is a gear. The transmission device 22 comprises a transmission connecting fixing piece 221 and a transmission piece 222; the transmission piece 222 is installed on the transmission connection fixing piece 221; drive 222 is an annulus gear. The driving member 214 is engaged with the driving member 222.

By arranging the rotation driving motor 213, and the rotation driving motor 213 is installed on the rotation connecting piece 212, the rotation connecting piece 212 is installed on the rotation shaft 211; under the action of the rotary driving motor 213, the driving member 214 is engaged with the transmission member 222; the rotary driving motor 213 drives itself to rotate around the transmission member 222 through self-transmission; this achieves that the turning device 21 rotates about the transmission 222. The transmission piece 222 is fixed by arranging the transmission connecting fixing piece 221; by providing the transmission member 222, the rotating device 21 is rotated by the transmission member 222.

The pile cutting mechanism 3 comprises a pile cutting driving hydraulic motor 32, a pile cutting extending hydraulic oil cylinder 33, a pile cutting support 31, a pile cutting connecting device 34 and a pile cutting part 35; in the present embodiment, the pile cutting member 35 is a saw blade, and the pile cutting driving hydraulic motor 32 is a bidirectional hydraulic motor. The pile cutting support 31 is connected with the rotating device 21, and the rotating device 21 drives the pile cutting support 31 to rotate; the pile cutting driving hydraulic motor 32, the pile cutting extending hydraulic oil cylinder 33, the pile cutting connecting device 34 and the pile cutting member 35 are all arranged in the pile cutting support 31; the pile cutting connecting device 34 and the pile cutting extending hydraulic cylinder 33 are respectively connected with the inner wall of the pile cutting support 31, the pile cutting driving hydraulic motor 32 is installed on the pile cutting connecting device 34, the pile cutting driving hydraulic motor 32 is connected with the pile cutting part 35, and the pile cutting extending hydraulic cylinder 33 is connected with the pile cutting connecting device 34; the pile cutting support 31 is provided with a pile cutting opening 311; the pile cutting extending hydraulic oil cylinder 33 drives the pile cutting member 35 to extend out of and retract into the pile cutting support 31 through the pile cutting opening 311 along the moving direction of the pile cutting connecting device 34.

The pile cutting connection device 34 comprises a hinged movable part 341, a connecting part 342 and a connecting fixed part 343; the hinged movable piece 341 is fixed on the inner wall of the pile cutting support 31, the connecting piece 342 is hinged with the hinged movable piece 341, and the connecting fixed piece 343 is connected with the connecting piece 342; the pile cutting part 35 is positioned at the lower end of the connecting and fixing part 343, and the pile cutting driving hydraulic motor 32 is arranged at the upper end of the connecting and fixing part 343; the pile cutting driving hydraulic motor 32 drives the pile cutting member 35 to rotate. The hinged movable piece 341 is connected with the inner wall of the pile cutting support 31; thus the direction of movement of the articulated rear link 342 is dictated; hinged to the hinged moving part 341 through a connecting part 342; so that the connecting member 342 swings about the hinge movable member 341; meanwhile, the pile cutting driving hydraulic motor 32 is connected with the connecting piece 342, so that the pile cutting piece 35 also swings along with the pile cutting driving hydraulic motor; the pile cutting driving hydraulic motor 32 is arranged to drive the pile cutting member 35 to rotate so as to cut the pile. The pile cutting extending hydraulic oil cylinder 33 is hinged with a connecting piece 342. The pile cutting extending hydraulic cylinder 33 is hinged with the connecting piece 342, and the pile cutting extending hydraulic cylinder 33 drives the connecting piece 342 to swing along the hinged movable piece 341.

The fixing device 4 is used for fixing the base 1; therefore, when the pile is cut, the machine base 1 cannot move; the pile cutting is more stable; the pile cutting mechanism 3 is driven to rotate by arranging a rotary structure, so that the pile cutting mechanism 3 can cut piles from different positions on the same horizontal line of the steel piles 5; thus, the use is convenient, and the pile cutting effect is good; the pile cutting part 35 is moved by arranging a pile cutting extending hydraulic oil cylinder 33; when the pile needs to be cut, the pile cutting part 35 extends out of the pile cutting support 31; after pile cutting is finished, the pile cutting part 35 is retracted into the pile cutting support 31; thus, the occupied space is small; meanwhile, the pile cutting support 31 plays a role in protecting the pile cutting member 35; avoiding the pile cutting member 35 from being impacted and damaged when not in work; the pile cutting connecting device 34 is arranged, and meanwhile, the pile cutting extending hydraulic oil cylinder 33 drives the pile cutting part 35 to swing along the pile cutting connecting device 34; thus, the moving direction of the pile cutting member 35 has directivity; the movement is more stable.

As shown in fig. 8, oil passages are communicated among the starting hydraulic system 61, the adjusting hydraulic system 62, the rotation driving hydraulic system 63, the pile cutting extending hydraulic system 64 and the pile cutting driving hydraulic system 65.

As shown in fig. 13, the starting hydraulic system 61 includes a starting pilot type relief valve 611 and a starting two-position four-way solenoid valve 612; the start two-position four-way solenoid valve 612 is connected with the start pilot-operated overflow valve 611, the start pilot-operated overflow valve 611 is connected with the oil tank 66 through the hydraulic pump 67, specifically, the input end of the pilot-operated overflow valve 611 is connected with the output end of the hydraulic pump 67, the output end of the pilot-operated overflow valve 611 is connected with the oil tank and is also connected with the control end of the pilot-operated overflow valve 611, the port P and the port T of the start two-position four-way solenoid valve 612, and the port B of the start two-position four-way solenoid valve 612 is connected with the control end of the pilot. In the starting hydraulic system, if the two-position four-way solenoid valve 612 is not powered, part of hydraulic oil at the output end of the pilot type overflow valve 611 enters the control end of the pilot type overflow valve 611 from the two-position four-way solenoid valve 612, the hydraulic oil of the hydraulic pump flows back to the oil tank from the pilot type overflow valve 611, if the two-position two-way solenoid valve 612 is powered, no hydraulic oil exists at the control end of the two-position two-way solenoid valve 612, the pilot type overflow valve 611 is closed, the hydraulic oil of the hydraulic pump is input into the regulating hydraulic system 62, the swing driving hydraulic system 63, the pile cutting extending hydraulic system 64 and the pile cutting driving hydraulic system 65, and only when the oil pressure in the hydraulic system is greater than the pressure of the pilot type overflow valve 611, an overflow phenomenon occurs in the process, so that the system oil pressure.

As shown in fig. 9, the regulated hydraulic system 62 includes a regulated three-position four-way solenoid valve 621, a regulated pilot-operated check valve 622, a first accumulator 623, a second accumulator 624 and a regulated hydraulic cylinder 422; the output end of a hydraulic pump at the P1 end of the three-position four-way electromagnetic valve 621 is adjusted, the T1 end of the three-position four-way electromagnetic valve 621 is connected with an oil tank, the A1 end of the three-position four-way electromagnetic valve 621 is connected with a control oil port of the adjusting hydraulic control one-way valve 622 and a rod cavity port of the adjusting hydraulic oil cylinder 422, and the B1 end of the three-position four-way electromagnetic valve 621 is connected with an oil inlet of the adjusting hydraulic control one-way valve 622; the rodless cavity port of the adjusting hydraulic oil cylinder 422 is connected with the oil outlet of the adjusting hydraulic control one-way valve 622 and the first energy accumulator 623, and the second energy accumulator 624 is connected with the first energy accumulator 623.

As shown in fig. 10, the swing drive hydraulic system 63 includes a swing three-position four-way solenoid valve 631, a swing balancing valve, and a swing drive device; the P2 end of the rotary three-position four-way solenoid valve 631 is connected with the output end of the hydraulic pump, the T2 end of the rotary three-position four-way solenoid valve 631 is connected with the oil tank, the A2 end and the B2 end of the rotary three-position four-way solenoid valve 631 are connected with a rotary balance valve, and the rotary balance valve is connected with the two ends of the rotary driving device; the rotary driving device comprises a rotary driving motor 213 and a normally closed brake 633; a normally closed brake 633 is used to brake the swing drive motor 213.

The rotary balance valve comprises a first rotary check valve 634, a second rotary check valve 635, a first rotary overflow valve 636 and a second rotary overflow valve 637; an oil outlet V1 of the first rotary overflow valve 636 is connected with the B2 end of the rotary three-position four-way solenoid valve 631, and an oil inlet C1 of the first rotary overflow valve 636 is connected with one end of the rotary driving motor 213; the oil drain port of the rotary driving motor 213 is connected with the oil tank; an oil outlet V2 of the second rotary overflow valve 637 is connected with an A2 of the rotary three-position four-way solenoid valve 631, and an oil inlet of the second rotary overflow valve 637 is connected with the other end of the rotary drive motor 213; an oil inlet of the first rotary check valve 634 is connected with an oil outlet of the first rotary overflow valve 636, and an oil outlet of the first rotary check valve 634 is connected with an oil inlet of the first rotary overflow valve 636; an oil inlet of the second rotary check valve 635 is connected with an oil outlet of the second rotary overflow valve 637, and an oil outlet of the second rotary check valve 635 is connected with an oil inlet of the second rotary overflow valve 637.

The rotary balance valve further comprises a shuttle valve 638; an oil inlet of the shuttle valve 638 is connected with an oil outlet of the first rotary overflow valve 636, and the other oil inlet of the shuttle valve 638 is connected with an oil outlet of the second rotary overflow valve 637; an oil outlet S of the shuttle valve 638 is connected with a normally closed brake 633.

The normally closed brake 633 comprises a brake disc 6331 and a brake cylinder 6332; the brake disc 6331 is connected with a brake cylinder 6332, and the brake cylinder 6332 is provided with a brake oil port 6334 and a return spring 6333; the brake disc 6331 acts with the rotation drive motor 213; the brake oil port 6334 is connected with the oil outlet S of the gate shuttle valve.

As shown in fig. 11, the pile cutting extension hydraulic system 64 includes an extension three-position four-way solenoid valve 641, an extension pilot operated check valve 642, and a pile cutting extension hydraulic cylinder 33; the end P3 extending out of the three-position four-way solenoid valve 641 is connected with the output end of the hydraulic pump, the end T3 extending out of the three-position four-way solenoid valve 641 is connected with the oil tank, the end A3 extending out of the three-position four-way solenoid valve 641 is connected with the control oil port extending out of the hydraulic control one-way valve 642 and the rod cavity port extending out of the pile cutting extending hydraulic oil cylinder 33, and the end B3 extending out of the three-position four-way solenoid valve 641 is connected with the oil inlet; the rodless cavity opening of the pile cutting extending hydraulic oil cylinder 33 is connected with the oil outlet of the extending hydraulic control one-way valve 642.

As shown in fig. 12, the pile cutting driving hydraulic system 65 includes a pile cutting three-position four-way solenoid valve 651, a pile cutting first one-way throttle valve, a pile cutting second one-way throttle valve, and a pile cutting driving hydraulic motor 32; the P4 end of the pile cutting three-position four-way electromagnetic valve 651 is connected with the output end of the hydraulic pump, the T4 end of the pile cutting three-position four-way electromagnetic valve 651 is connected with the oil tank, the A4 end of the pile cutting three-position four-way electromagnetic valve 651 is connected with a first pile cutting one-way throttle valve, the B4 end of the pile cutting three-position four-way electromagnetic valve 651 is connected with a second pile cutting one-way throttle valve, and the first pile cutting one-way throttle valve and the second pile cutting one-way throttle valve are respectively connected with one end of a pile cutting driving.

The pile cutting first one-way throttling valve comprises a pile cutting first one-way valve 652 and a pile cutting first throttling valve 653; an oil inlet of the pile cutting first throttling valve 653 is connected with the B4 end of the pile cutting three-position four-way electromagnetic valve 651, and an oil outlet of the pile cutting first throttling valve 653 is connected with one end of the pile cutting driving hydraulic motor 32; an oil inlet of the pile cutting first one-way valve 652 is connected with an oil outlet of the pile cutting first throttling valve 653, and an oil outlet of the pile cutting first one-way valve 652 is connected with an oil inlet of the pile cutting first throttling valve 653.

The pile cutting second one-way throttling valve comprises a pile cutting second one-way valve 654 and a pile cutting second throttling valve 655; an oil inlet of the pile cutting second throttling valve 655 is connected with the end A4 of the pile cutting three-position four-way electromagnetic valve 651, and an oil outlet of the pile cutting second throttling valve 655 is connected with the other end of the pile cutting driving hydraulic motor 32; an oil inlet of the pile cutting second one-way valve 654 is connected with an oil outlet of the pile cutting second throttling valve 655, and an oil outlet of the pile cutting second one-way valve 654 is connected with an oil inlet of the pile cutting second throttling valve 655; the oil drain port of the pile cutting driving hydraulic motor 32 is connected with an oil tank.

In the hydraulic system, the YV10 end of the three-position four-way electromagnetic valve 621 is adjusted to be electrified, hydraulic oil flows to the B1 from the P1 and then flows to the adjusting hydraulic oil cylinder 422 through the adjusting hydraulic control one-way valve 622, and the hydraulic oil of the adjusting hydraulic oil cylinder 422 flows to the T1 from the A1; therefore, the hydraulic oil flows into the oil inlet of the regulating hydraulic control one-way valve 622 and then flows into the rodless cavity opening of the regulating hydraulic oil cylinder 422, and the stretching of the regulating hydraulic oil cylinder 422 is realized; meanwhile, an energy storage device is arranged; a part of the hydraulic oil flowing out of the oil outlet of the regulating hydraulic control one-way valve 622 is stored in the energy accumulator; therefore, when the hydraulic oil is not input from the oil inlet of the adjusting hydraulic control one-way valve 622, the energy accumulator can still keep the external support force extending out of the adjusting hydraulic oil cylinder 422 unchanged, and the stability of the external support is ensured; when the YV11 end of the three-position four-way electromagnetic valve 621 is adjusted to be electrified, hydraulic oil flows to A1 from P1, and flows into the rod cavity port of the adjusting hydraulic oil cylinder 422; meanwhile, a control oil port of the hydraulic control one-way valve 622 is communicated with A1; now the pilot operated check valve 622 is opened; hydraulic oil can flow in reverse on the pilot operated check valve 622; thus hydraulic oil flowing out of the rodless chamber port of the pilot hydraulic cylinder 422 flows into the pilot operated check valve 622 and then flows from B1 to T1; and the retraction of the hydraulic oil cylinder is adjusted.

When the YV20 end of the rotary three-position four-way solenoid valve 631 is electrified; the hydraulic oil flows from P2 to B2, flows into the swing drive motor 213, and then flows from a2 to T2 through the swing relief valve two 637; thus, hydraulic oil flows into the rotary drive motor through the first rotary check valve 634, and simultaneously a part of hydraulic oil flows into the normally closed brake 633 from the shuttle valve 638; at this time, the hydraulic oil overcomes the spring force of the return spring, and the brake cylinder retracts in the direction away from the rotary driving motor 213 under the action of the hydraulic oil; the normally closed brake 633 does not brake the rotary drive motor; the rotation of the swing drive motor 213 from one direction is realized; when the three-position four-way electromagnetic valve 631 is reset to the middle position, hydraulic oil stops being input; the hydraulic oil flows back to B2 from the brake oil cylinder; the brake oil cylinder extends out towards the direction close to the rotary driving motor under the action of the return spring, and the normally closed brake brakes the rotary driving motor; therefore, the rotary driving motor cannot rotate continuously under the action of inertia after being stopped; similarly, the YV21 end of the rotary three-position four-way solenoid valve 631 is electrified; the hydraulic oil flows from P2 to A2, flows into the rotary driving motor and then flows from B2 to T2 through a first rotary overflow valve; thus, the hydraulic oil flows into the rotary driving motor through the second rotary check valve, and meanwhile, a part of the hydraulic oil opens the shuttle valve 638 and then flows into the normally closed brake; the rotation of the rotary driving motor from the other direction is realized.

When the YV12 end extending out of the three-position four-way solenoid valve 641 is electrified; hydraulic oil flows from P3 to B3, and hydraulic oil for cutting the pile and extending out of the hydraulic oil cylinder 33 flows from A3 to T3; therefore, hydraulic oil flows into the rodless cavity opening of the pile cutting extension hydraulic oil cylinder 33 through the oil inlet of the extension hydraulic control one-way valve 642 to realize that the pile cutting extension hydraulic oil cylinder extends out; when the YV13 end extending out of the three-position four-way solenoid valve 641 is electrified; hydraulic oil flows from P3 to A3, then flows from B3 to T3 after extending out of the hydraulic oil cylinder 33 through the cut pile; thus, hydraulic oil flows into the rod cavity port of the pile cutting extension hydraulic oil cylinder 33, the control oil port of the pilot-controlled check valve 542 is communicated with A3, and the extension pilot-controlled check valve 642 is opened at the moment; hydraulic oil can flow in reverse direction on the extended pilot-controlled check valve 642; the cut pile extends out of the rodless cavity of the hydraulic oil cylinder, flows into the extension hydraulic control one-way valve after being discharged from the rodless cavity of the cut pile extension hydraulic oil cylinder, and then flows from B3 to T3, so that the cut pile extension hydraulic oil cylinder retracts.

When the YV22 end of the pile cutting three-position four-way electromagnetic valve 651 is electrified; hydraulic oil flows from P4 to B4, then flows into the pile cutting driving hydraulic motor 32, and flows from A4 to T4; so that the hydraulic oil flows into the pile cutting first throttle 653 and then into the pile cutting drive hydraulic motor 32; then flows through the second cut-pile check valve 654 from A4 to T4; the hydraulic motor 32 is driven to rotate from one direction by pile cutting; when the YV23 end of the pile cutting three-position four-way electromagnetic valve 651 is electrified, hydraulic oil flows to A4 from P4, then flows to a pile cutting driving hydraulic motor and then flows to T4 from B4; so that the hydraulic oil flows into the pile cutting second throttle valve 655 and then into the pile cutting drive hydraulic motor 62; then flows through the cut pile first one-way valve 652 and then flows from B4 to a 4; the hydraulic motor is driven to rotate from the other direction by cutting the pile.

As shown in fig. 7, the working method of the present invention includes the following steps:

(1) connecting the pile cutting machine with a hanging beam of a crane, and moving the pile cutting machine into the steel pile by the crane; the steel pile is fixed with a hanging beam of a crane; then, the pile cutting detection device and the rotation detection device are started.

(2) The two-position four-way solenoid valve is controlled to be electrified, and the hydraulic oil of the hydraulic pump 67 flows into the regulating hydraulic system 62, the rotation driving hydraulic system 63, the pile cutting extending hydraulic system 64 and the pile cutting driving hydraulic system 65 and is stabilized through the pilot overflow valve 611.

(3) Starting and adjusting the YV10 end of the three-position four-way electromagnetic valve to be electrified; and the hydraulic oil cylinder is adjusted to extend out, and when the hydraulic oil cylinder is adjusted to be in contact with the steel pile, the fixing device is stably fixed inside the steel pile.

(4) Starting the YV22 end of the pile cutting three-position four-way electromagnetic valve to be electrified; the pile cutting driving hydraulic motor is started, and the pile cutting driving hydraulic motor drives the pile cutting part to rotate.

(5) Starting the YV12 end extending out of the three-position four-way electromagnetic valve to be electrified; the pile cutting extending hydraulic oil cylinder drives the pile cutting member to extend out of the pile cutting support, and when the pile cutting extending hydraulic oil cylinder extends out to enable the pile cutting member to contact with the steel pile, the pile cutting extending hydraulic oil cylinder continues to extend out until part of the pile cutting member penetrates through the steel pile; in the process, the pile cutting detection device detects the steel pile in real time, and step (6) is carried out according with the detection result.

(6) Starting the YV13 end extending out of the three-position four-way electromagnetic valve to be electrified; the pile cutting part is driven by the pile cutting extending hydraulic oil cylinder to be retracted into the pile cutting support, and the three-position four-way electromagnetic valve is extended to be reset to a middle position after the pile cutting part is extended and retracted to the initial position; controlling the YV20 end of the rotary three-position four-way electromagnetic valve to be electrified; the normally closed brake does not brake the rotary driving motor, and the rotary driving motor drives the pile cutting mechanism to rotate for 25 degrees; when the pile cutting mechanism rotates by 25 degrees, the rotary three-position four-way electromagnetic valve is reset to the middle position, the normally closed brake brakes the rotary driving motor, and the rotary driving motor stops.

(7) Conducting steps (5) and (6).

(8) Judging whether pile cutting is finished or not, and repeating the steps (5) and (6) if the pile cutting is not finished until the rotary driving motor drives the pile cutting mechanism to rotate 360 degrees and the steel pile cutting is finished; step (9) is performed.

(9) Controlling the pile cutting three-position four-way electromagnetic valve to reset to a middle position; the pile cutting driving hydraulic motor stops rotating, and the end extending out of the three-position four-way electromagnetic valve YV13 is controlled to be electrified; the pile cutting part is driven by the pile cutting extending hydraulic oil cylinder to retract the pile cutting support; after the pile cutting part is retracted to the initial position; the three-position four-way electromagnetic valve is extended to reset to the middle position; then controlling and adjusting the YV11 end of the three-position four-way electromagnetic valve to be electrified; the hydraulic oil cylinder is adjusted to retract, and after the hydraulic oil cylinder is adjusted to retract to the initial position, the three-position four-way electromagnetic valve is adjusted to reset to the middle position; and then closing the pile cutting detection device, closing the rotation detection device, and enabling the two-position four-way electromagnetic valve to be de-energized, so that hydraulic oil of the hydraulic pump flows back to the oil tank, and then the crane moves the pile cutting machine and the cut steel pile away.

The pile cutting method comprises the following steps: the adjusting hydraulic oil cylinder is a hydraulic oil cylinder. The step (3) is specifically as follows: and adjusting a piston rod of the hydraulic oil cylinder to be far away from the outer wall of the base, and adjusting the piston rod of the hydraulic oil cylinder to be in contact with the inner wall surface of the steel pile.

In the step (5), the coincidence detection result is as follows: the pile cutting member penetrates the steel pile and ensures that the cut to the steel pile is greater than 25 ° in the circumferential direction. The pile cutting detection device is a sensor for detecting the angle of the pile cutting part extending out of the outer wall of the steel pile, when the diameter of the pile cutting part is determined, the angle of the cut pile can be determined by detecting the extending amount of the pile cutting part.

And (6) monitoring in real time by the rotation detection device, when the rotation angle of the pile cutting mechanism is detected to reach 25 degrees, sending a signal to the rotation mechanism by the rotation detection device, controlling the rotation three-position four-way electromagnetic valve to reset to the middle position, braking the rotation driving motor by the normally closed brake, and stopping the rotation driving motor. The rotation detection device is an angle sensor.

The step (9) is specifically as follows: and adjusting a piston rod of the hydraulic oil cylinder to be close to the outer wall of the base, and adjusting the piston rod of the hydraulic oil cylinder to be separated from the inner wall surface of the steel pile.

In the method, the pile cutting machine is connected with the crane; therefore, the pile cutting machine can be moved into the steel pile; fixing the steel pile with a hanging beam of a crane; therefore, the cut steel pile can be conveniently lifted away. Then starting the pile cutting detection device and the rotation detection device; the pile cutting detection device detects the steel pile in real time, and the rotation detection device detects the rotation angle of the pile cutting mechanism in real time; therefore, the operation can be carried out according to the detection result, and the control effect is good; then, the YV10 end of the two-position four-way electromagnetic valve is electrified by starting the two-position four-way electromagnetic valve and adjusting the three-position four-way electromagnetic valve; controlling the adjusting hydraulic oil cylinder to be far away from the outer wall of the machine base, and enabling the adjusting hydraulic oil cylinder and the fixed supporting leg to be in contact with and fixed on the inner wall surface of the steel pile; then starting and adjusting the three-position four-way electromagnetic valve to reset to a middle position; the hydraulic oil cylinder is adjusted to realize that the fixing device is fixed in the steel pile under the action of the energy accumulator, so that the pile cutting is convenient.

Then starting the YV22 end of the pile cutting three-position four-way electromagnetic valve to be electrified; the pile cutting driving hydraulic motor drives the pile cutting part to rotate, and the YV12 end extending out of the three-position four-way electromagnetic valve is started to be electrified; the pile cutting extending hydraulic oil cylinder drives the pile cutting part to extend out of the pile cutting support to cut the steel pile; the pile cutting part is contacted with the steel pile in a rotating state and is cut; therefore, the pile cutting part can be prevented from being contacted with the steel pile and then rotated, so that the cutting opening on the steel pile clamps the pile cutting part, and the pile cutting part is damaged; meanwhile, when the cutting position of the steel pile is detected to be in accordance with the condition that the cutting position of the pile cutting part penetrates through the current steel pile, the pile cutting part is reset, and then the YV20 end of the rotary three-position four-way electromagnetic valve is started to be electrified; the normally closed brake does not brake the rotary driving motor; the rotary driving motor rotates again; therefore, the pile cutting mechanism can be ensured to continuously complete 360-degree rotation; separating the cut steel pile from the lower end of the steel pile; meanwhile, the rotation angle of the pile cutting mechanism is controlled to be 25 degrees each time; therefore, uncut parts between different cutting positions on the steel pile can be avoided, and low working efficiency caused by over-small rotation angle can be avoided; meanwhile, a normally closed brake is used; the rotary driving motor can not rotate continuously under the action of inertia after stopping; and finally, after the steel pile cutting is finished, the pile cutting machine and the cut steel pile are lifted away through a lifting beam of the crane.