CN115263218B

CN115263218B - Hydraulic cutting apparatus and control method thereof

Info

Publication number: CN115263218B
Application number: CN202210856880.7A
Authority: CN
Inventors: 盖竹兴; 陈宏宇; 陈先树; 孙晓辉; 刘伟强; 王云博
Original assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Current assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2023-07-28
Anticipated expiration: 2042-07-20
Also published as: CN115263218A

Abstract

The invention discloses hydraulic cutting equipment and a control method thereof, and relates to the technical field of hydraulic cutting. The hydraulic cutting equipment comprises a running gear, a cutting arm, a supporting mechanism and a lifting mechanism, wherein the lifting mechanism is arranged on the running gear, the cutting arm is provided with a first end and a second end which are opposite, the first end of the cutting arm is connected with the lifting mechanism, and the lifting mechanism can drive the first end of the cutting arm to rise or fall; the support mechanism and the second end of the cutting arm can drive the second end of the cutting arm to rise or fall. The problem that the front and back feed angles of the hydraulic cutting equipment are easy to deviate can be solved by the scheme.

Description

Hydraulic cutting apparatus and control method thereof

Technical Field

The invention relates to the technical field of hydraulic cutting, in particular to hydraulic cutting equipment and a control method thereof.

Background

In many projects, it is necessary to cut the object to be cut using a hydraulic cutting apparatus. Taking a wellhead device as an example of a to-be-cut object, after wellhead blowout occurs, the blowout center temperature can reach more than 1200 ℃, water needs to be sprayed by a fire monitor on site, and the wellhead device is cut by high-pressure hydraulic cutting equipment.

Generally, the hydraulic cutting device has a relatively low cutting speed under a high temperature condition and is easily affected by high temperature, so that after a period of cutting, the hydraulic cutting device needs to be withdrawn from a high temperature area, and the hydraulic cutting device is buffered for a period of time and then fed for cutting.

In order to improve the cutting efficiency, the same feeding position and the same feeding angle are ensured in each feeding cutting. The cutting end of the hydraulic cutting equipment in the related art is provided with a positioning structure, the cutting position is required to be determined by means of the positioning structure before each cutting, the positioning process is complex, the positioning precision is low, and the cutting angle cannot be adjusted after the cutting position is determined. Therefore, the hydraulic cutting apparatus in the related art is liable to have a deviation in front and rear cutting fractures due to the difference in front and rear feed angles.

Disclosure of Invention

The invention discloses hydraulic cutting equipment, which aims to solve the problem that the front and rear feed angles of the hydraulic cutting equipment are easy to deviate.

In order to solve the problems, the invention adopts the following technical scheme:

a hydraulic cutting device comprises a traveling device, a cutting arm, a supporting mechanism and a lifting mechanism,

the lifting mechanism is arranged on the traveling device, the cutting arm is provided with a first end and a second end which are opposite to each other, the first end of the cutting arm is connected with the lifting mechanism, and the lifting mechanism can drive the first end of the cutting arm to rise or fall;

The support mechanism and the second end of the cutting arm can drive the second end of the cutting arm to rise or fall.

Based on the hydraulic cutting device disclosed by the embodiment of the invention, the embodiment of the invention also discloses a control method of the hydraulic cutting device. Illustratively, the control method includes:

detecting position information of a cutting arm;

controlling the cutting arm to move to a preset cutting position;

controlling a cutting arm to cut the object to be cut;

after the cutting arm interrupts cutting, the cutting arm is controlled to move to the resume cutting position according to the first position information, which is the position information in the case where the cutting arm moves to the interrupt position.

The technical scheme adopted by the invention can achieve the following beneficial effects:

in the hydraulic cutting equipment disclosed by the embodiment of the invention, the supporting mechanism can realize the adjustment of the height of the second end of the cutting arm through lifting. The lifting mechanism may be adapted to adjust the height of the first end of the cutting arm by lifting. Therefore, the hydraulic cutting device can ensure that the cutting arm keeps consistent postures in the front and back cutting processes by respectively adjusting the heights of the first end and the second end of the cutting arm. Illustratively, hydraulic cutting equipment typically requires that the cutting arm remain level during use in cutting the wellhead in order to reduce the amount of cutting. And the height of the second end of the cutting arm can be adjusted by adjusting the height of the supporting structure, so that the cutting height can be adjusted. Further, in the case that the height of the second end of the cutting arm is fixed, the height of the first end of the cutting arm may be raised or lowered by the lifting mechanism to achieve the adjustment of the cutting angle. Under the condition that the cutting angle is horizontal, the height of the first end of the cutting arm is consistent with the height of the second end of the cutting arm through adjusting the lifting mechanism, and then the cutting angle of the cutting arm is horizontal.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

FIG. 1 is a schematic view of a hydraulic cutting apparatus according to one embodiment of the present disclosure at a first perspective;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic view of a traction arm and running gear of a hydraulic cutting apparatus according to an embodiment of the present invention;

FIG. 4 is a schematic view of a hydraulic cutting apparatus according to one embodiment of the present disclosure at a second perspective;

FIG. 5 is an enlarged view of a portion of the lift mechanism of FIG. 4;

FIG. 6 is a schematic view of a support mechanism according to some embodiments of the present invention in a first state;

FIG. 7 is a schematic view of a support mechanism according to some embodiments of the present invention in a second state;

FIG. 8 is an enlarged view of a portion of the drive assembly of FIG. 1;

FIG. 9 is a schematic diagram illustrating a transmission of a drive assembly according to some embodiments of the present invention at a first viewing angle;

FIG. 10 is a schematic diagram illustrating a transmission of a drive assembly according to some embodiments of the present invention at a second viewing angle;

FIG. 11 is a schematic view of a hydraulic cutting apparatus according to one embodiment of the present disclosure at a third perspective;

Fig. 12 is a schematic view of a squib lifting mechanism in accordance with one embodiment of the present invention.

Reference numerals illustrate: 100-walking device; 200-cutting arms; 210-a first electromagnetic wave reflecting member; 220-a second electromagnetic wave reflecting member; 230-a third electromagnetic wave reflecting member; 240-mast; 250-a first pull rope; 300-a supporting mechanism; 310-supporting legs; 320-a drive assembly; 321-a support arm; 3211-a sliding portion; 322-worm; 323-worm gear; 324-a third drive member; 325-a first mount; 3251-limit hole; 326-a second mount; 327-a pull rod; 328-screw; 330-a roller assembly; 400-lifting mechanism; 410-supporting frame; 420-lifting the plate; 421-a first support; 422-a second support; 423-a third support; 424-first connection; 425-a second connection; 426-a third connection; 430-a first driver; 500-a second driving member; 600-connecting piece; 610-a first connecting arm; 620-a second connecting arm; 700-positioning device; 710-an electromagnetic wave emitting assembly; 720-electromagnetic wave reflection base station; 800-control means; 900-a mechanical positioning mechanism; 1000-a fire-igniting cylinder lifting mechanism; 1010-lifting hook; 1011-hook slot; 1020-self-locking plate; 1021-release hook; 1030-mounting plate; 1100-a trailing arm; 1110-a second pull cord; 1200-traction mechanism; 1300-bearings.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The following describes the technical solutions disclosed in the various embodiments of the present invention in detail with reference to fig. 1 to 12.

Referring to fig. 1, in some alternative embodiments, a hydraulic cutting apparatus includes a running gear 100, a cutting arm 200, a support mechanism 300, and a lifting mechanism 400. Illustratively, running gear 100 is a basic structural member that may be used to provide a mounting base for other components. Optionally, running gear 100 is used for movement of the hydraulic cutting apparatus. Specifically, other components in the hydraulic cutting apparatus, such as: the cutting arm 200, the supporting mechanism 300 and the lifting mechanism 400 can be driven by the travelling device 100 to move, so that the position of the hydraulic cutting device relative to the cut object is adjusted.

The running gear 100 is a movable mechanism, for example: a vehicle chassis. Alternatively, running gear 100 may be a tracked vehicle chassis.

Referring to fig. 1 and 2, in some alternative embodiments, a lifting mechanism 400 is provided to the running gear 100. Illustratively, running gear 100 has two opposite first and second sides, the first side being the side facing the ground and the second side being the side facing away from the ground. Alternatively, the second lifting mechanism 400 may be disposed on a side of the running gear 100 facing away from the ground.

Referring to fig. 1 and 4, the cutting arm 200 has opposite first and second ends, the first end of the cutting arm 200 is connected to a lifting mechanism 400, and the lifting mechanism 400 can drive the first end of the cutting arm 200 to be raised or lowered. The support mechanism 300 and the second end of the cutting arm 200, and the support mechanism 300 can drive the second end of the cutting arm 200 to be raised or lowered.

In some alternative embodiments, during the use of the hydraulic cutting apparatus to cut an object to be cut, the height of the second end of the cutting arm 200, and thus the cutting height, may be adjusted by the support mechanism 300 to accommodate different cutting heights. Further, the height of the first end of the cutting arm 200 may be adjusted by the lifting mechanism 400, so that the cutting arm 200 takes the supporting mechanism 300 as a supporting point and rotates around the supporting point, and the cutting angle of the cutting arm 200 is adjusted to adapt to different cutting angles.

In the hydraulic cutting device in the above embodiment, the cutting height of the second end of the cutting arm 200 may be adjusted by the supporting mechanism 300, and the cutting angle of the cutting arm 200 may be adjusted by the lifting mechanism 400, so that the cutting height and the cutting angle in the front and rear cutting process may be kept consistent by adjusting the lifting mechanism 400 and the supporting mechanism 300 in the cutting process, thereby being beneficial to preventing the cutting amount from being increased due to different cutting heights and cutting angles in the front and rear cutting process, and improving the cutting efficiency.

Illustratively, after a blowout at the wellhead occurs, the wellhead may be cut using the hydraulic cutting device described in the above embodiments. In order to reduce the amount of cutting during cutting, the cutting surface can be minimized by adjusting the cutting angle of the cutting arm 200. Typically, the wellhead device is vertically disposed, so that in order to reduce the cutting amount, the cutting arm 200 can be adjusted to be horizontal, so as to realize horizontal feeding, so that the cutting surface is minimized, and the cutting efficiency is improved.

In some alternative embodiments, a level detection device is also provided on the cutting arm 200 to detect the levelness of the cutting arm 200 by the level detection device. Illustratively, the hydraulic cutting apparatus further includes a controller, and the level detection device, the lifting mechanism 400, and/or the support mechanism 300 are communicatively coupled to the controller such that the control can control the lifting mechanism 400 and/or the support mechanism 300 based on the levelness detected by the level detection device.

Specifically, during the cutting process, the supporting mechanism 300 may be adjusted, so that the supporting mechanism 300 may drive the second end of the cutting arm 200 to a specified height, so as to achieve the adjustment of the cutting height. And after cutting for a period of time, the hydraulic cutting device is withdrawn and cooled. The hydraulic cutting device after cooling can be used for enabling the cutting height and the feeding angle to be consistent with the cutting height and the feeding angle of the last time through adjusting the supporting mechanism 300 and the lifting mechanism 400 again, so that the cutting amount in the two cutting processes can be overlapped, and the cutting amount is prevented from being increased due to the fact that the cutting surfaces in the two cutting processes are different.

In some alternative embodiments, the lift mechanism 400 includes a support frame 410, a lift plate 420, and a first drive 430. The support frame 410 is a basic structural component of the lift mechanism 400 and may provide a mounting base for the lift plate 420 and the first drive member 430.

Illustratively, the support frame 410 is connected to the running gear 100, so that the running gear 100 can drive the support frame 410 to move during the moving process.

In some alternative embodiments, the lifting plate 420 has a first support 421 and a second support 422, the first support 421 being rotatably coupled to the support frame 410. The second support 422 is rotatably coupled to the first end of the cutting arm 200. The first driving member 430 is connected to the supporting frame 410 and the lifting plate 420, and the first driving member 430 is used for driving the lifting plate 420 to rotate relative to the supporting frame 410 and driving the first end of the cutting arm 200 to rise or fall.

In the above embodiment, the first end of the cutting arm 200 is supported on the lifting plate 420, and the lifting plate 420 is respectively supported by the supporting frame 410 and the first driving member 430, so that the acting force for supporting the cutting arm 200 can be dispersed by the lifting plate 420, and the independent stress of the first driving member 430 is avoided, so that the stress of the first driving member 430 is reduced, and the load of the first driving member 430 is reduced.

Referring to fig. 2 to 5, in some alternative embodiments, the first support 421 is rotatably coupled to the support frame 410 through a first rotation axis, and the second support 422 is rotatably coupled to the cutting arm 200 through a second rotation axis. Optionally, the first rotation axis is parallel to the second rotation axis. In a further alternative embodiment, in case the hydraulic cutting device is located in a horizontal plane, both the first rotation axis and the second rotation axis are parallel to the horizontal plane. Illustratively, the first and second ends of the cutting arm 200 are both ends of the cutting arm 200 in the length direction. Alternatively, the axial directions of the first and second rotating shafts are perpendicular to the length direction of the cutting arm 200.

Referring to fig. 5, the first driving member 430 may also be a telescoping driving member. The first driving member 430 may be of various types, such as a hydraulic cylinder, an air cylinder, an electromagnetic linear module, etc. For this reason, the present embodiment is not limited to a specific kind of the first driving member 430.

Referring to fig. 5, in some alternative embodiments, the lifting plate 420 further has a third supporting portion 423 and a first connecting portion 424, two ends of the first connecting portion 424 are connected to the first supporting portion 421 and the second supporting portion 422, respectively, the third supporting portion 423 is located at a side of the first connecting portion 424 away from the supporting frame 410, and the third supporting portion 423 is rotatably connected to the first driving member 430.

In the above embodiment, it is beneficial to increase the space between the third supporting portion 423 and the supporting frame 410, and further to increase the length of the first driving member 430, so that the telescopic range of the first driving member 430 is larger. Thus, the solution described in this embodiment is beneficial for increasing the range of movement of the first end of the cutting arm 200 in the vertical direction, and thus for increasing the range of adjustment of the cutting angle of the cutting arm 200 and the range of the cutting height of the cutting arm 200. In addition, referring to fig. 5, the third supporting portion 423 is located at a side of the first connecting portion 424 away from the supporting frame 410, i.e., the height of the third supporting portion 423 is greater than the height of the second supporting portion 422. Thus, this embodiment is beneficial for reducing the minimum cutting height of the cutting arm 200.

Referring to FIG. 5, in some alternative embodiments, the lift plate 420 further includes a second connection 425 and a third connection 426. Illustratively, both ends of the second connecting portion 425 are connected to the second supporting portion 422 and the third supporting portion 423, respectively. Both ends of the third connection part 426 are connected to the third supporting part 423 and the first supporting part 421, respectively. Illustratively, the lifting plate 420 is triangular in shape, and the first, second and third supporting portions 421, 422 and 423 may respectively form three vertices of the triangular lifting plate 420. Alternatively, the first, second and third connection parts 424, 425 and 426 may form three sides of the triangular lifting plate 420, respectively. This embodiment is beneficial for improving the stability of the lift plate 420 and for improving the load carrying capacity of the lift plate 420.

In some alternative embodiments, the top end of the support frame 410 is rotatably connected to the first support portion 421, and the bottom end of the support frame 410 is rotatably connected to an end of the first driving member 430 remote from the third support portion 423. Referring to fig. 5, in this embodiment, the first driving member 430 is connected to the bottom end of the supporting frame 410, which is beneficial for reducing the stress of the supporting frame 410 during the lifting process, and thus for improving the bearing capacity of the lifting mechanism 400.

Referring to fig. 5, in a further alternative embodiment, the top end of the support frame 410 is offset toward a side away from the cutting arm 200 with respect to the bottom end of the support frame 410, and the third support portion 423 is offset toward an end closer to the cutting arm 200 with respect to the bottom end of the support frame 410. This embodiment is beneficial to reducing the moment applied to the connection between the lifting mechanism 400 and the running gear 100, and thus is beneficial to making the acting force applied between the running gear 100 and the ground relatively uniform in the length direction of the cutting arm 200, and is beneficial to improving the balance performance of the running gear 100.

Referring to fig. 2 and 3, in some alternative embodiments, the lifting mechanism 400 includes two support brackets 410, two lifting plates 420, and two first drives 430. Illustratively, the support frame 410, the lifting plate 420, and the first driving member 430 are disposed in a one-to-one correspondence.

Referring to fig. 2, two support frames 410 are disposed in parallel and symmetrically to the running gear 100. The two lifting plates 420 and the two first driving members 430 are disposed on the support frame 410 in parallel and symmetrically. Further alternatively, a first beam is provided between the two support frames 410, so that the two support frames 410 may be fixedly connected by the first beam. Optionally, a second beam is disposed between the two lifting plates 420, and the two lifting plates 420 may be fixedly connected by the second beam.

In the above embodiment, the two support frames 410 and the two lifting plates 420 are beneficial to improve the stability of the lifting mechanism 400 and the load of the single first driving member 430 can be reduced. In addition, the first beam and the second beam can ensure that the two lifting plates 420 move synchronously, which is beneficial to ensuring that the two supporting frames 410 and the two lifting plates 420 are stressed uniformly.

Referring to fig. 5, in some alternative embodiments, the hydraulic cutting apparatus further comprises a second drive 500. The bottom end of the support frame 410 is rotatably connected to the running gear 100. The second driving member 500 is connected to the support frame 410 and the running device 100, and the second driving member 500 is used for driving the support frame 410 to rotate relative to the running device 100 towards two sides of the running direction of the running device 100.

In the above embodiment, the second driving member 500 can drive the supporting frame 410 to rotate, and further drive the cutting arm 200 to rotate, so as to adjust the relative position between the cutting arm 200 and the object to be cut, so as to ensure that the object to be cut is within the cutting range of the cutting arm 200.

In some alternative embodiments, the hydraulic cutting apparatus further comprises a cutting device. Illustratively, the cutting device is disposed at a second end of the cutting arm 200. In the cutting process, the second driving member 500 drives the supporting frame 410 to rotate relative to the traveling device 100, so as to drive the cutting device at the second end of the cutting arm 200 to move relative to the object to be cut until the object to be cut is located within the cutting range of the cutting device.

Illustratively, a bearing 1300 is disposed between the bottom of the support frame 410 and the running gear 100, so that the bottom of the support frame 410 can be in running fit with the running gear 100 through the bearing 1300 to reduce the resistance of the support frame 410 to the running gear 100.

In an alternative embodiment, the side of running gear 100 facing away from the ground has a mounting surface. Illustratively, the support frame 410 rotates relative to the running gear 100 about a first axis, optionally perpendicular to the mounting surface, such that the bottom of the support frame 410 is rotatable along the mounting surface. In a further alternative embodiment, the first axis is perpendicular to the axis direction of the first rotation shaft connecting the first supporting portion 421 and the supporting frame 410.

There are many kinds of the second driving member 500, such as a motor, a hydraulic cylinder, etc. For this reason, the present embodiment is not limited to a specific kind of the second driving member 500.

In an alternative embodiment, the second driving member 500 is in transmission connection with the supporting frame 410 through a worm and gear, so that not only can the worm and gear be utilized to play a role in reducing speed and improve the control precision of the hydraulic cutting device, but also the limiting of the supporting frame 410 and the running device 100 can be realized by utilizing the characteristic of unidirectional transmission of the worm and gear.

In some alternative embodiments, the length of the cutting arm 200 may be 20m to 30m. Illustratively, the cutting arm 200 may be 26m in length. Due to the longer length of the cutting arm 200. Therefore, during the cutting operation, the support frame 410 rotates by a small angle relative to the running gear 100, so as to obtain a larger rotation of the second end of the cutting arm 200. In some alternative embodiments, the hydraulic cutting device further comprises a decelerator, through which the second driving member 500 is coupled to the support frame 410. This embodiment is beneficial for improving the control accuracy of the hydraulic cutting device.

In some alternative embodiments, the support frame 410 is provided with a locating pin and the running gear 100 is provided with a locating slot. The positioning pin is slidably engaged with the support frame 410, and the positioning pin is switchable between a first state and a second state relative to the support frame 410. Illustratively, with the locating pin in the first position relative to the support frame 410, the locating pin is at least partially positioned within the locating slot such that the locating pin may define a rotation of the support frame 410 relative to the running gear 100. In the second state of the positioning pin relative to the support frame 410, the positioning pin moves out of the positioning slot, so that the support frame 410 can rotate relative to the running device 100.

Referring to fig. 2 and 5, the hydraulic cutting apparatus further includes a connector 600. The connector 600 has a first connecting arm 610 and a second connecting arm 620, wherein a first end of the first connecting arm 610 is rotatably connected to the lifting mechanism 400, a second end of the first connecting arm 610 is connected to the second connecting arm 620, the second connecting arm 620 is inclined to the bottom side of the first connecting arm 610 with respect to the first connecting arm 610, and an end of the second connecting arm 620 away from the first connecting arm 610 is connected to the first end of the cutting arm 200.

Illustratively, a first end of the first connecting arm 610 is rotatably coupled to the lifting mechanism 400 via a rotational shaft. Further, the rotation axis for connecting the first connection arm 610 and the lifting mechanism 400 is parallel to the first rotation axis and/or the second rotation axis. Further alternatively, the first end of the first connecting arm 610 is rotatably connected to the second supporting portion 422.

In the above embodiment, the second connecting arm 620 is inclined to the bottom side of the first connecting arm 610 relative to the first connecting arm 610, which is beneficial to reduce the height of the portion of the connecting piece 600 connected to the cutting arm 200, further reduce the minimum cutting height of the cutting arm 200 during the cutting operation, and increase the cutting range of the cutting arm 200.

In an alternative embodiment, the end of the second connecting arm 620 remote from the first connecting arm 610 is flush with the bottom side of the cutting arm 200. This embodiment may further reduce the minimum cutting height of the cutting arm 200 during the cutting action. Specifically, the connector 600 in this embodiment, in combination with the lifting mechanism 400, can make the minimum height of the cutting arm 200 reach 200mm, so as to be suitable for the cut object at the low cutting position.

Referring to fig. 11, the hydraulic cutting apparatus includes two sets of support mechanisms 300, and the two sets of support mechanisms 300 are disposed on both sides of the cutting arm 200, respectively. Illustratively, two sets of support mechanisms 300 are disposed on both sides of the cutting arm 200 in the width direction. The width direction of the cutting arm 200 is perpendicular to the length direction of the cutting arm 200. Alternatively, two sets of support mechanisms 300 are disposed on the left and right sides of the cutting arm 200, respectively.

In the above embodiment, the two sets of support mechanisms 300 can respectively adjust the heights of the two sides of the second end of the cutting arm 200, so that the second end of the cutting arm 200 can be kept horizontal in the width direction of the cutting arm 200, which is beneficial to reducing the cutting amount in the cutting process. Of course, the cutting angle of the second end of the cutting arm 200 in the width direction may also be achieved by two sets of support mechanisms 300 to ensure that the cutting angle of the cutting arm 200 in the width direction is consistent, which is beneficial to improving the cutting efficiency.

It should be noted that, in the above embodiment, the connection between the cutting arm 200 and the two sets of supporting mechanisms 300 and the connection between the cutting arm 200 and the lifting mechanism 400 form three supporting points, so that the cutting direction of the cutting arm 200 can be kept horizontal in both the length direction and the width direction of the cutting arm 200 by adjusting the heights of the two sets of supporting mechanisms 300 and/or the lifting mechanism 400, which is beneficial to improving the cutting efficiency and the cutting precision.

Referring to fig. 6 and 7, the hydraulic cutting apparatus further includes a positioning device 700 and a control device 800, the positioning device 700 being used to detect positional information of the first end of the cutting arm 200 and positional information of both sides of the second end of the cutting arm 200. The control device 800 is respectively connected to the two supporting mechanisms 300 and the lifting mechanism 400, and the control device 800 is used for controlling the two supporting mechanisms 300 and the lifting mechanism 400 to drive the cutting arm 200 to rise or fall according to the position information detected by the positioning device 700, so as to realize automatic positioning of the cutting arm 200.

The preset cutting position refers to the position where the cutting arm 200 is located when cutting for the first time. Specifically, the position of the cutting arm 200 includes the height of the first end and the heights of both sides of the second end in the width direction of the cutting arm 200.

The positioning device 700 is used for detecting position information of the cutting arm 200, the control device 800 is respectively in communication connection with the positioning device 700, the lifting mechanism 400 and the two sets of supporting mechanisms 300, the control device 800 is used for controlling the lifting mechanism 400 and the two sets of supporting mechanisms 300 to drive the cutting arm 200 to move to the cutting recovery position according to first position information, and the first position information is position information of the cutting arm 200 moving to the interruption position.

Wherein the interruption position refers to a position when the cutting arm 200 interrupts cutting, and the cutting arm 200 stops cutting and exits at the interruption position; the resume cutting position refers to a position when the cutting arm 200 resumes cutting, and after the withdrawal buffer is completed, the cutting arm 200 moves to the resume cutting position and continues the cutting process. In this embodiment, the interruption position and the resume cutting position may be the same position. Specifically, the cutting arm 200 includes a cutting head, which is opposite to a position to be cut of the object to be cut in a case where the cutting arm 200 moves to the resume cutting position, at which time the cutting arm 200 resumes the cutting process.

Specifically, the positioning device 700 may be a position sensor, or may be other elements capable of detecting the position of the cutting arm 200; the control device 800 may be a PLC (programmable controller, programmable Logic Controller), a single chip microcomputer, or other controllers.

In the positioning process, the control device 800 controls the lifting mechanism 400 and the two sets of support mechanisms 300 to drive the cutting arm 200 to move to the cutting recovery position again according to the first position information detected by the positioning device 700, so that the cutting arm 200 can directly continue cutting. So set up, realize automated control process, need not to rely on mechanical positioning structure to fix a position when feeding at every turn, positioning process is simple, and positioning accuracy is high.

In the above embodiment, the control device 800 may control the lifting mechanism 400 and the two sets of support mechanisms 300 to adjust the cutting height and the cutting angle, so as to ensure that the front-rear cutting height and the cutting direction are consistent. Illustratively, in the case of horizontal cutting, this embodiment can achieve the lengthwise and widthwise directions of the cutting arm 200 to be horizontal, thereby improving the front-rear cutting height and cutting direction uniformity.

In some alternative embodiments, the positioning device 700 includes an electromagnetic wave emitting assembly 710. The cutting arm 200 includes a first electromagnetic wave reflecting member 210, a second electromagnetic wave reflecting member 220, and a third electromagnetic wave reflecting member 230, the first electromagnetic wave reflecting member 210 and the second electromagnetic wave reflecting member 220 being disposed at both sides of the second end of the cutting arm 200, respectively, and the third electromagnetic wave reflecting member 230 being disposed at the first end of the cutting arm 200. The electromagnetic wave emitting means 710 is for emitting the first detected electromagnetic wave, the first electromagnetic wave reflecting means 210, the second electromagnetic wave reflecting means 220 and the third electromagnetic wave reflecting means 230 are for receiving the first detected electromagnetic wave and reflecting the first detected electromagnetic wave to the electromagnetic wave emitting means 710, and the electromagnetic wave emitting means 710 is communicatively connected to the first electromagnetic wave reflecting means 210, the second electromagnetic wave reflecting means 220, the third electromagnetic wave reflecting means 230 and the control device 800, respectively.

The position of the electromagnetic wave emitting assembly 710 is not changed during the movement of the cutting arm 200, and thus, the positions of the first electromagnetic wave reflecting member 210, the second electromagnetic wave reflecting member 220, and/or the third electromagnetic wave reflecting member 230 with respect to the electromagnetic wave emitting assembly 710 are changed from time to time.

Specifically, the electromagnetic wave emitting means 710 can calculate the time from the emission of the first detected electromagnetic wave to the reflection of the first detected electromagnetic wave back to the electromagnetic wave emitting means 710, determine the distances between the first electromagnetic wave reflecting means 210, the second electromagnetic wave reflecting means 220, and the third electromagnetic wave reflecting means 230 and the electromagnetic wave emitting means 710 according to the speed of the electromagnetic wave, and determine the positions of the first electromagnetic wave reflecting means 210, the second electromagnetic wave reflecting means 220, and/or the third electromagnetic wave reflecting means 230 with respect to the electromagnetic wave emitting means 710 according to the angle at which the electromagnetic wave emitting means 710 reflects back the first detected electromagnetic wave. That is, by means of the electromagnetic wave emitting means 710, position information of the first electromagnetic wave reflecting member 210, the second electromagnetic wave reflecting member 220, and/or the third electromagnetic wave reflecting member 230, that is, position information of the first electromagnetic wave reflecting member 210, the second electromagnetic wave reflecting member 220, and/or the third electromagnetic wave reflecting member 230 when the cutting arm 200 moves to the interruption position, is detected.

Wherein the first detected electromagnetic wave may be a laser, the electromagnetic wave emitting assembly 710 may be a laser emitter, and the first electromagnetic wave reflecting member 210, the second electromagnetic wave reflecting member 220, and/or the third electromagnetic wave reflecting member 230 have the function of receiving the laser and reflecting the laser. Of course, the first detected electromagnetic wave is not limited to the laser light.

By adopting the principle of electromagnetic wave positioning, the positioning speed is high, the positioning efficiency is high, and the position information of the first electromagnetic wave reflecting component 210, the second electromagnetic wave reflecting component 220 and/or the third electromagnetic wave reflecting component 230 can be accurately obtained, so that the position information of the cutting arm 200 can be determined.

In a further embodiment, as shown in fig. 11, the positioning device 700 further includes an electromagnetic wave reflection base station 720, the electromagnetic wave transmission component 710 is configured to transmit the second detected electromagnetic wave, the electromagnetic wave reflection base station 720 is capable of receiving the second detected electromagnetic wave and reflecting the second detected electromagnetic wave to the electromagnetic wave transmission component 710, and the electromagnetic wave reflection base station 720 is communicatively connected to the electromagnetic wave transmission component 710, so that the electromagnetic wave transmission component 710 obtains the positional information of the first electromagnetic wave reflection component 210, the second electromagnetic wave reflection component 220, and/or the third electromagnetic wave reflection component 230 relative to the electromagnetic wave reflection base station 720.

Specifically, the interaction between the electromagnetic wave reflecting base station 720 and the electromagnetic wave emitting assembly 710 is performed through the second detection electromagnetic wave, the interaction principle is the same as the interaction principle between the first electromagnetic wave reflecting member 210, the second electromagnetic wave reflecting member 220 and/or the third electromagnetic wave reflecting member 230 and the electromagnetic wave emitting assembly 710 described above, so that the position information of the electromagnetic wave reflecting base station 720 with respect to the electromagnetic wave emitting assembly 710 is determined, and according to the above, the position information of the first electromagnetic wave reflecting member 210, the second electromagnetic wave reflecting member 220 and/or the third electromagnetic wave reflecting member 230 with respect to the electromagnetic wave emitting assembly 710 has been determined, and then the position information of the first electromagnetic wave reflecting member 210, the second electromagnetic wave reflecting member 220 and/or the third electromagnetic wave reflecting member 230 with respect to the electromagnetic wave reflecting base station 720 can be finally determined.

In this case, the position where the electromagnetic wave emitting means 710 emits the first detected electromagnetic wave or the second detected electromagnetic wave is not limited, so long as the position of the electromagnetic wave reflecting base station 720 is determined, even if the electromagnetic wave emitting means 710 emits the electromagnetic wave from a different position, the positional information of the cutting arm 200 with respect to the electromagnetic wave reflecting base station 720 at the same position is unchanged. In this way, the user can adjust the position of the electromagnetic wave emitting assembly 710 as desired to accommodate the needs of the positioning process.

Referring to fig. 6 and 7, in some alternative embodiments, the support mechanism 300 includes support legs 310, a drive assembly 320, and a roller assembly 330. The first end of the support leg 310 is rotatably coupled to the cutting arm 200 and the second end of the support leg 310 is rotatably coupled to the roller assembly 330. The driving assembly 320 is disposed on the cutting arm 200, and the driving assembly 320 is used for driving the support leg 310 to rotate between a first position and a second position relative to the cutting arm 200. In the case where the support leg 310 is located at the first position, the height of the support leg 310 in the vertical direction is the first height. In the case where the support leg 310 is located at the second position, the height of the support leg 310 in the vertical direction is a second height, and the first height is smaller than the second height.

Illustratively, the support legs 310 are disposed on a side of the cutting arm 200 that is adjacent to the ground. Further alternatively, the support legs 310 may be rotatably coupled to the cutting arm 200 via a rotational shaft. Alternatively, the rotation shaft connecting the support legs 310 and the cutting arm 200 may be disposed along the width direction of the cutting arm 200.

In the above embodiment, the driving assembly 320 adjusts the height of the supporting leg 310 in the vertical direction by driving the supporting leg 310 to rotate relative to the cutting arm 200, thereby achieving the lifting or lowering of both sides of the second end of the cutting arm 200.

There are many kinds of driving components 320, for example: hydraulic cylinders, air cylinders, etc. For this reason, the present embodiment does not limit the specific kind of the driving assembly 320.

In some alternative embodiments, the drive assembly 320 includes a support arm 321, a first mount 325, and a third drive 324. Illustratively, a first end of the support arm 321 is rotatably coupled to the support leg 310 and a second end of the support arm 321 is slidably and rotatably coupled to the first mount 325. The third driving member 324 is connected to the supporting arm 321, and the third driving member 324 is used for driving the supporting arm 321 to slide relative to the first mounting seat 325.

Illustratively, the first mount 325 has a limiting aperture 3251 and the second end of the support arm 321 has a slider 3211. At least part of the sliding portion 3211 is located in the limiting hole 3251, and the sliding portion 3211 is slidingly and rotationally matched with the limiting hole 3251.

Illustratively, the slider 3211 may be a cylindrical protrusion. The limiting hole 3251 is provided along the length direction of the cutting arm 200 such that the sliding portion 3211 is movable along the length direction of the cutting arm 200 along the limiting hole 3251 by the third driving member 324.

In some alternative embodiments, drive assembly 320 further includes a pull rod 327. Illustratively, the third drive member 324 is coupled to the support arm 321 by a pull rod 327. This embodiment can increase the interval between the third driving member 324 and the support leg 310 by the pull rod 327, thereby preventing the third driving member 324 from being damaged by the high temperature.

In some alternative embodiments, as shown in fig. 8-10, the drive assembly 320 further includes a worm 322, a worm gear 323, a lead screw 328, and a second mount 326. Illustratively, the second mount 326 is disposed on the cutting arm 200. Specifically, the second mount 326 provides a mounting base for the worm wheel 323, worm 322, and third drive 324.

Referring to fig. 5, a worm wheel 323 and a worm 322 are provided on the second mount 326, and the worm wheel 323 and the worm 322 are engaged to drive. Further alternatively, the worm 322 is connected to the third driving member 324, such that the third driving member 324 can drive the worm 322 to rotate the worm wheel 323. Further alternatively, the worm wheel 323 is disposed on the screw 328 such that the worm wheel 323 can rotate the screw 328. In some alternative embodiments, lead screw 328 is threadedly engaged with tie rod 327.

In the above embodiment, the worm wheel 323 and the worm 322 not only can realize unidirectional transmission, but also can play a role of decelerating, thereby being beneficial to the rotation limit of the supporting leg 310 and the cutting arm 200 and improving the accuracy of the supporting mechanism 300 for driving the cutting arm 200 to rise and fall.

In some alternative embodiments, the hydraulic cutting apparatus further comprises a mechanical positioning mechanism 900 and a primer cartridge lifting mechanism 1000, each of the mechanical positioning mechanism 900 and primer cartridge lifting mechanism 1000 being selectively removably coupled to the second end of the cutting arm 200.

In the above embodiment, the mechanical positioning mechanism 900 or the squib lifting mechanism 1000 may be mounted on the second end of the cutting arm 200 in a rotating manner as required.

Illustratively, in the case of a hydraulic cutting device for cutting, the mechanical positioning mechanism 900 is mounted at the second end of the cutting arm 200, so as to reduce the difficulty of positioning and matching between the cutting arm 200 and the object to be cut by positioning and matching the mechanical positioning mechanism 900 with the object to be cut. Illustratively, the mechanical positioning mechanism 900 has a "V" shaped positioning slot, so that the object to be cut can slide along the side walls of the positioning slot until both sides of the object to be cut are respectively lower than both side walls of the positioning slot.

In the case where the hydraulic cutting device is used to hoist the pilot cylinder, the pilot cylinder hoisting mechanism 1000 is disposed at the second end of the cutting arm 200 to implement hoisting of the pilot cylinder by the pilot cylinder hoisting mechanism 1000.

In this way, the hydraulic cutting device according to the above embodiment may optionally install the mechanical positioning mechanism 900 or the igniting cylinder lifting mechanism 1000 at the second end of the cutting arm 200 according to needs, so as to implement cutting action or lifting of the igniting cylinder, increase functions of hydraulic cutting equipment, and expand application range of the hydraulic cutting equipment.

In some alternative embodiments, as shown in fig. 12, the primer barrel lifting mechanism 1000 includes a lifting hook 1010 and a self-locking plate 1020, wherein the lifting hook 1010 is detachably connected to the second end of the cutting arm 200, the lifting hook 1010 is provided with a hook slot 1011, the hook slot 1011 is used for hanging the primer barrel, the self-locking plate 1020 is rotatably connected to the lifting hook 1010, and the self-locking plate 1020 can rotate relative to the lifting hook 1010 under the action of gravity until the self-locking plate 1020 is at least partially located on the inner side wall protruding from the hook slot 1011.

In the above embodiment, after the pilot cylinder is assembled to the hook slot 1011, the self-locking plate 1020 can realize self-locking under the action of gravity to prevent the assembly failure between the pilot cylinder and the pilot cylinder lifting mechanism 1000. Illustratively, the primer cartridge has lugs on both sides that are at least partially within the hook slots 1011 when the primer cartridge is assembled to the primer cartridge lifting mechanism 1000. The self-locking plate 1020 can rotate relative to the lifting hook 1010 under the action of gravity until the self-locking plate 1020 is at least partially positioned on the inner side wall protruding out of the hook slot 1011, so that lugs on two sides of the igniting cylinder can be prevented from sliding out of the hook slot 1011 along the side wall of the hook slot 1011, and the assembling stability between the igniting cylinder and the igniting cylinder lifting mechanism 1000 is improved.

Referring to fig. 12, in some alternative embodiments, the self-locking plate 1020 has a release hook 1021. Under the condition that the igniting cylinder needs to be disassembled, the loosening hooks 1021 can be supported by the stick, so that the self-locking plate 1020 is opposite to the lifting hooks 1010, and further the part of the self-locking plate 1020 protruding out of the hook slot 1011 moves inwards in the direction of the inner side wall of the hook slot 1011 until the lugs on the two sides of the igniting cylinder can slide out of the hook slot 1011 along the side wall of the hook slot 1011.

In some alternative embodiments, the primer cartridge lifting mechanism 1000 further comprises a mounting plate 1030. Illustratively, the lifting hooks 1010 are fixedly disposed on the mounting plate 1030. Further, mounting holes are provided in the mounting plate 1030 so that the mounting plate 1030 may be fixedly mounted to the second end of the cutting arm 200 by bolts.

In an alternative embodiment, as shown in fig. 1-5, the cutting arm 200 further includes a mast 240 and a first pull cord 250. Illustratively, a first end of the mast 240 is coupled to the lift mechanism 400 and a second end of the mast 240 is coupled to the cutting arm 200 via a first pull cord 250. Optionally, a first end of the mast 240 is rotatably coupled to the lifting mechanism 400. Further alternatively, the cutting arm 200 and the lifting mechanism 400 and the first end of the mast 240 and the lifting mechanism 400 may be rotatably coupled by the same rotation axis.

In a further alternative embodiment, the hydraulic cutting device further includes a pulling arm 1100, a second pull cord 1110, and a pulling mechanism 1200. Illustratively, the traction arm 1100 is coupled to the running gear 100, and the traction arm 1100 and the cutting arm 200 are positioned on opposite sides of the running gear 100. Traction mechanism 1200 is disposed at an end of traction arm 1100 remote from running gear 100. The first end of the second draw string 1110 is coupled to the second end of the mast 240 and the second end of the second draw string 1110 is coupled to the traction mechanism 1200.

In the above embodiment, the second pulling rope 1110 is pulled by the pulling mechanism 1200 to drive the mast 240 and the cutting arm 200 to rotate relative to the lifting mechanism 400, so as to achieve lifting of the second end of the cutting arm 200. Specifically, the second pull rope 1110 may be pulled by the traction mechanism 1200 to drive the cutting arm 200 to implement lifting of the pilot cylinder.

It should be noted that, during the cutting operation, at least one of the second pulling rope 1110 and the first pulling rope 250 may be in a loose state, so as to avoid driving the mast 240 during the lifting process of the lifting mechanism 400, and further avoid the mast 240 from affecting the adjustment of the cutting angle of the cutting arm 200.

Step 101, detecting position information of a cutting arm;

step 103, controlling the cutting arm to move to a preset cutting position;

step 105, controlling a cutting arm to cut a to-be-cut object;

step 107, after the cutting arm interrupts cutting, controlling the cutting arm to move to the resume cutting position according to the first position information, wherein the first position information is the position information in the case that the cutting arm moves to the interrupt position.

Specifically, the positioning device 700 is used to detect positional information of the cutting arm 200. In the present embodiment, the electromagnetic wave transmitting means 710 transmits the second detection electromagnetic wave to the electromagnetic wave reflecting base station 720 first, and then transmits the first detection electromagnetic wave to the first electromagnetic wave reflecting member 210, the second electromagnetic wave reflecting member 220, and the third electromagnetic wave reflecting member 230, respectively, thereby detecting positional information of the first electromagnetic wave reflecting member 210, the second electromagnetic wave reflecting member 220, and the third electromagnetic wave reflecting member 230 with respect to the electromagnetic wave reflecting base station 720.

The cutting arm 200 is controlled to move to a preset cutting position. Specifically, the movement of the cutting arm 200 to the preset cutting position may be controlled by the control device 800. In this embodiment, the preset cutting position may be a cutting position where the cutting arm 200 performs a cutting operation on the object to be cut.

Alternatively, the positioning device 700 may detect the position information of the cutting arm 200 from time to time during the movement of the cutting arm 200 to the preset cutting position; the positioning device 700 may start to detect the position information of the cutting arm 200 again when the cutting arm 200 moves to the preset cutting position, in any case, the positioning device 700 may detect the first position information of the cutting arm 200 moving to the interrupt position.

The cutting arm 200 is controlled to cut the object to be cut. Specifically, the cutting arm 200 may be controlled by the control device 800 to cut the object to be cut. The cutting arm 200 includes a cutting head to which the external fracturing truck delivers sand liquid through a delivery pipe, and the cutting head sprays the sand liquid at a position to be cut of the object to be cut, and starts a cutting process.

So set up, hydraulic cutting device can realize automatic cutting, improves cutting efficiency.

Specifically, when the cutting arm interrupts cutting, the control device 800 controls the first driving mechanism to drive the cutting arm 200 to retract, so that the cutting arm 200 is far away from the object to be cut and is buffered, that is, after the cutting arm interrupts cutting, the control device 800 controls the first driving mechanism to drive the cutting arm 200 to move to the cutting recovery position according to the first position information.

So set up, realize automated control process, need not to rely on mechanical positioning structure frequent location when feeding at every turn, positioning process is simple, and positioning accuracy is high.

The foregoing embodiments of the present invention mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in view of brevity of line text, no further description is provided herein.

The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are to be included in the scope of the claims of the present invention.

Claims

1. A hydraulic cutting device is characterized by comprising a traveling device (100), a cutting arm (200), a supporting mechanism (300) and a lifting mechanism (400),

the lifting mechanism (400) is arranged on the travelling device (100), the cutting arm (200) is provided with a first end and a second end which are opposite, the first end of the cutting arm (200) is connected with the lifting mechanism (400), and the lifting mechanism (400) can drive the first end of the cutting arm (200) to rise or fall;

-the support mechanism (300) and the second end of the cutting arm (200), and-the support mechanism (300) is operable to raise or lower the second end of the cutting arm (200);

the lifting mechanism (400) comprises a supporting frame (410), a lifting plate (420) and a first driving piece (430),

the supporting frame (410) is connected with the walking device (100);

the lifting plate (420) is provided with a first supporting part (421) and a second supporting part (422), the first supporting part (421) is rotationally connected with the supporting frame (410), and the second supporting part (422) is rotationally connected with the first end of the cutting arm (200);

the first driving piece (430) is respectively connected with the supporting frame (410) and the lifting plate (420), and the first driving piece is used for driving the lifting plate (420) to rotate relative to the supporting frame (410) and driving the first end of the cutting arm (200) to rise or fall.

2. The hydraulic cutting apparatus according to claim 1, wherein the lifting plate (420) further has a third supporting portion (423) and a first connecting portion (424), both ends of the first connecting portion (424) are connected to the first supporting portion (421) and the second supporting portion (422), respectively, the third supporting portion (423) is located at a side of the first connecting portion (424) away from the supporting frame (410), and the third supporting portion (423) is rotatably connected to the first driving member (430).

3. The hydraulic cutting apparatus according to claim 2, wherein a top end of the support frame (410) is rotatably connected to the first support portion (421), and a bottom end of the support frame (410) is rotatably connected to an end of the first driving member (430) remote from the third support portion (423).

4. The hydraulic cutting apparatus according to claim 1, further comprising a second driving member (500), wherein the bottom end of the support frame (410) is rotatably connected to the travelling device (100), the second driving member (500) is connected to the support frame (410) and the travelling device (100), and the second driving member (500) is configured to drive the support frame (410) to rotate relative to the travelling device (100) towards both sides of the travelling direction of the travelling device (100).

5. The hydraulic cutting apparatus according to claim 1, further comprising a connector (600), the connector (600) having a first connecting arm (610) and a second connecting arm (620), a first end of the first connecting arm (610) being rotatably connected to the lifting mechanism (400), a second end of the first connecting arm (610) being connected to the second connecting arm (620), the second connecting arm (620) being arranged inclined with respect to the first connecting arm (610) towards a bottom side of the first connecting arm (610), an end of the second connecting arm (620) remote from the first connecting arm (610) being connected to the first end of the cutting arm (200).

6. The hydraulic cutting apparatus according to any one of claims 1 to 5, characterized in that it comprises two sets of said support means (300), two sets of said support means (300) being provided on either side of said cutting arm (200).

7. The hydraulic cutting apparatus according to claim 6, further comprising positioning means (700) and control means (800), the positioning means (700) being adapted to detect position information of a first end of the cutting arm (200) and position information of both sides of a second end of the cutting arm (200);

the control device (800) is respectively connected with the two supporting mechanisms (300) and the lifting mechanism (400), and the control device (800) is used for controlling the two supporting mechanisms (300) and the lifting mechanism (400) to drive the cutting arm (200) to rise or fall according to the position information detected by the positioning device (700).

8. The hydraulic cutting apparatus according to claim 7, wherein the positioning device (700) includes an electromagnetic wave emitting assembly (710), the cutting arm (200) includes a first electromagnetic wave reflecting member (210), a second electromagnetic wave reflecting member (220), and a third electromagnetic wave reflecting member (230), the first electromagnetic wave reflecting member (210) and the second electromagnetic wave reflecting member (220) are respectively disposed at both sides of a second end of the cutting arm (200), and the third electromagnetic wave reflecting member (230) is disposed at a first end of the cutting arm (200);

The electromagnetic wave transmitting assembly (710) is used for transmitting first detection electromagnetic waves, the first electromagnetic wave reflecting component (210), the second electromagnetic wave reflecting component (220) and the third electromagnetic wave reflecting component (230) are used for receiving the first detection electromagnetic waves and reflecting the first detection electromagnetic waves to the electromagnetic wave transmitting assembly (710), and the electromagnetic wave transmitting assembly (710) is respectively in communication connection with the first electromagnetic wave reflecting component (210), the second electromagnetic wave reflecting component (220), the third electromagnetic wave reflecting component (230) and the control device (800).

9. The hydraulic cutting apparatus of claim 1, wherein the support mechanism (300) includes a support leg (310), a drive assembly (320) and a roller assembly (330), a first end of the support leg (310) is rotatably coupled to the cutting arm (200), a second end of the support leg (310) is rotatably coupled to the roller assembly (330), the drive assembly (320) is disposed on the cutting arm (200), and the drive assembly (320) is configured to drive the support leg (310) to rotate relative to the cutting arm (200) between a first position and a second position,

The height of the support leg (310) in the vertical direction is a first height with the support leg (310) in the first position,

the height of the support leg (310) in the vertical direction is a second height, the first height being smaller than the second height, with the support leg (310) in the second position.

10. The hydraulic cutting apparatus of claim 1, further comprising a mechanical positioning mechanism (900) and a primer cartridge hoist mechanism (1000), wherein the mechanical positioning mechanism (900) and the primer cartridge hoist mechanism (1000) are each selectively removably coupled to the second end of the cutting arm (200).

11. The hydraulic cutting apparatus according to claim 10, wherein the pilot cylinder lifting mechanism (1000) comprises a lifting hook (1010) and a self-locking plate (1020), the lifting hook (1010) is detachably connected with the second end of the cutting arm (200), the lifting hook (1010) is provided with a hook slot (1011), the hook slot (1011) is used for being hung with the pilot cylinder, the self-locking plate (1020) is rotatably connected with the lifting hook (1010), and the self-locking plate (1020) can rotate relative to the lifting hook (1010) under the action of gravity until the self-locking plate (1020) is at least partially located on the inner side wall protruding from the hook slot (1011).

12. A control method of a hydraulic cutting apparatus, applied to the hydraulic cutting apparatus according to any one of claims 7 to 11, characterized by comprising:

detecting position information of the cutting arm;

controlling the cutting arm to move to a preset cutting position;

controlling the cutting arm to cut the object to be cut;

after the cutting arm interrupts cutting, controlling the cutting arm to move to a cutting recovery position according to first position information, wherein the first position information is position information in the case that the cutting arm moves to an interrupt position.