CN113751785A - Underwater cutting apparatus and method of cutting underwater pipeline using the same - Google Patents
Underwater cutting apparatus and method of cutting underwater pipeline using the same Download PDFInfo
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- CN113751785A CN113751785A CN202111093845.6A CN202111093845A CN113751785A CN 113751785 A CN113751785 A CN 113751785A CN 202111093845 A CN202111093845 A CN 202111093845A CN 113751785 A CN113751785 A CN 113751785A
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- 238000005520 cutting process Methods 0.000 title claims abstract description 402
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000012806 monitoring device Methods 0.000 claims abstract description 38
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- 229910000831 Steel Inorganic materials 0.000 description 11
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Abstract
Embodiments of the present disclosure provide an underwater cutting apparatus and a method of cutting an underwater pipe using the same. The underwater cutting device includes a supporting device configured to fix the underwater cutting device on an inner wall of the underwater pipe, a cutting device configured to cut the underwater pipe, and a monitoring device configured to monitor a cutting state of the cutting device. A method of cutting an underwater pipeline comprising: transferring the underwater cutting equipment to a position to be cut of the underwater pipeline; preliminarily fixing the supporting device; monitoring the cutting state of the cutting device through a monitoring device and generating cutting state information; adjusting and calibrating the cutting state of the cutting device according to the cutting state information; further fixing the support device; and cutting the underwater pipeline by using a cutting device. The method for cutting the underwater pipeline can improve the cutting precision and the cutting speed of the underwater pipeline, reduce the cost, reduce the occupied area and reduce the operation danger.
Description
Technical Field
Embodiments of the present disclosure relate to an underwater cutting apparatus and a method of cutting an underwater pipe using the same.
Background
At present, it has become a trend for offshore operation equipment (e.g. offshore wind power piles) to use pile-steel platform foundations. The supporting structure of the pile foundation-steel bearing platform base of the offshore wind power pile mainly comprises at least one (for example three) pipeline sunk into the sea bottom as the pile foundation, a steel bearing platform base is arranged on the upper part of the pile foundation, and wind power equipment is arranged on the bearing platform base. The pile foundation-steel bearing platform base structure has the advantages of high material strength utilization rate, short construction period, low cost, wide application range and the like, but the cutting process precision requirement on the underwater pipeline is more strict, for example, the horizontal error after the three pipelines are cut cannot exceed 5mm, and the inclination of the pipeline cannot exceed 5 per thousand.
Disclosure of Invention
Embodiments of the present disclosure provide an underwater cutting apparatus and a method of cutting an underwater pipe using the same. The underwater cutting equipment and the method for cutting the underwater pipeline by adopting the underwater cutting equipment can improve the cutting precision and the cutting speed of the underwater pipeline, reduce the cost, reduce the occupied area and reduce the operation danger.
An embodiment of the present disclosure provides a method of cutting an underwater pipeline with an underwater cutting device, the underwater cutting device including a supporting device configured to fix the underwater cutting device on an inner wall of the underwater pipeline, a cutting device configured to cut the underwater pipeline, and a monitoring device configured to monitor a cutting state of the cutting device. The method for cutting the underwater pipeline comprises the following steps: moving the underwater cutting device to a position to be cut of the underwater pipeline; preliminarily fixing the supporting device to preliminarily fix the underwater cutting equipment at the position to be cut; monitoring the cutting state of the cutting device by the monitoring device and generating cutting state information; adjusting and calibrating the cutting state of the cutting device according to the cutting state information; further fixing the support device; and cutting the underwater pipeline with the cutting device.
In some examples, the underwater cutting apparatus includes a central cylinder on which the supporting device, the cutting device, and the monitoring device are all provided, the supporting device includes two positioning leg sets that are provided separately in an axial direction of the central cylinder, the preliminary fixing the supporting device includes fixing one of the two positioning leg sets to an inner wall of the underwater pipeline, and the further fixing the supporting device includes fixing the other of the two positioning leg sets also to the inner wall of the underwater pipeline.
In some examples, the cutting device includes an interconnected rotary cutter disc and a cutting angle adjustment device configured to adjust a cutting angle of the cutting device, the monitoring the cutting status of the cutting device by the monitoring device and generating cutting status information including: monitoring a cutting angle of the cutting device by the monitoring device; adjusting and calibrating the cutting state of the cutting device according to the cutting state information includes: and adjusting and calibrating the cutting angle according to the cutting angle obtained by monitoring.
In some examples, the cutting angle adjusting device includes a first hydraulic cylinder, a telescopic direction of the first hydraulic cylinder is not perpendicular to an axial direction of the underwater pipeline, and adjusting and calibrating the cutting angle according to the monitored cutting angle includes: and controlling the first hydraulic cylinder to stretch out and draw back so as to adjust the axial included angle between the rotary cutter head and the underwater pipeline.
In some examples, the cutting device includes a rotating cutter head, and monitoring the cutting status of the cutting device and generating cutting status information via the monitoring device includes: monitoring the axial position of the rotary cutter head in the underwater pipeline through the monitoring device; adjusting and calibrating the cutting state of the cutting device according to the cutting state information includes: and loosening the supporting device, adjusting the position of the rotary cutter head in the axial direction of the underwater pipeline until the position of the rotary cutter head in the axial direction of the underwater pipeline coincides with the position to be cut, and fixing the supporting device.
In some examples, the cutting device includes a rotary cutterhead and a radial feed adjustment device connected to each other, the radial feed adjustment device configured to adjust the radial feed of the rotary cutterhead, the cutting the underwater pipeline with the cutting device includes: and monitoring the radial feeding amount of the rotary cutter head through the monitoring device, and adjusting the radial feeding amount of the rotary cutter head through the radial feeding adjusting device.
In some examples, cutting the underwater pipeline with the cutting device further comprises: and monitoring the state of the rotary cutter head and the progress of the cutting operation by the monitoring device.
In some examples, prior to moving the underwater cutting device to a position to be cut of the underwater pipeline, the method of cutting an underwater pipeline further comprises: checking whether the functions of the supporting device, the cutting device and the monitoring device are normal.
In some examples, moving the underwater cutting device to a position to be cut of the underwater pipe comprises: hoisting the underwater cutting equipment to the pipe orifice of the underwater pipeline, checking the operation environment of the area where the underwater pipeline is located, lowering the underwater cutting equipment along the inner space of the underwater pipeline, and measuring the lowering distance of the underwater cutting equipment until the underwater cutting equipment reaches the position to be cut.
In some examples, the support device includes a second hydraulic cylinder and a positioning leg, the second hydraulic cylinder is configured to drive the positioning leg to expand and contract along a radial direction of the underwater pipeline, and the preliminary fixing of the support device includes: and adjusting the hydraulic cylinder support leg to extend out along the radial direction of the underwater pipeline until the hydraulic cylinder support leg presses the inner wall of the underwater pipeline, so that the underwater cutting equipment is fixed on the inner wall of the underwater pipeline.
In some examples, the method of cutting an underwater pipeline further comprises: after the underwater pipeline is cut into a first part and a second part, fixing the underwater cutting equipment on the first part, separating the underwater cutting equipment from the second part, and hoisting and recovering the second part; and separating the underwater cutting equipment from the first part, and hoisting and recovering the underwater cutting equipment.
An embodiment of the present disclosure provides an underwater cutting apparatus, including: a central barrel; a support device disposed on the central cylinder configured to secure the underwater cutting apparatus on an inner wall of the underwater pipeline; a cutting device disposed on the central cylinder configured to cut the underwater pipeline; a monitoring device disposed on the central barrel configured to monitor a cutting state of the cutting device and generate cutting state information; and a controller connected with the supporting device and the cutting device and configured to control the supporting device and the cutting device to move according to the cutting state information.
In some examples, the cutting device includes an interconnected rotary cutterhead and a cutting angle adjustment device configured to adjust a cutting angle of the cutting device.
In some examples, the cutting angle adjusting device includes a first hydraulic cylinder, the first hydraulic cylinder enables the rotary cutter head to swing through stretching, so as to adjust an included angle between the rotary cutter head and the axial direction of the underwater pipeline, and the stretching direction of the first hydraulic cylinder is not perpendicular to the axial direction of the underwater pipeline.
In some examples, the cutting device further comprises a radial feed adjustment device coupled to the rotary impeller, the radial feed adjustment device configured to adjust an amount of radial feed of the rotary impeller.
In some examples, the support device comprises a second hydraulic cylinder and a support block, the second hydraulic cylinder being configured to drive the support block to move in a radial direction of the underwater pipe to abut against or disengage from an inner wall of the underwater pipe.
In some examples, the underwater cutting apparatus includes a central cylinder on which the supporting device, the cutting device, and the monitoring device are disposed at intervals in an axial direction of the central cylinder, the supporting device includes two positioning leg groups disposed at intervals in the axial direction of the central cylinder, and the cutting device and the monitoring device are disposed between the two positioning leg groups.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.
FIG. 1 is a schematic three-dimensional view of an underwater cutting device according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural view of a hoisting device for underwater cutting according to an embodiment of the present disclosure;
FIG. 3 is a flow chart of a method of cutting an underwater pipeline with an underwater cutting device according to an embodiment of the present disclosure; and
fig. 4 is a schematic structural view of a sling slide according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
One method of cutting underwater pipelines is to use an abrasive jet cutting process for the cutting. The abrasive jet cutting process mainly comprises the steps of placing a cutting head into an underwater pipeline, and cutting the underwater pipeline through ejected high-pressure abrasive fluid after the cutting head is fixed. The method has various defects, such as low cutting precision (the cutting angle cannot be adjusted), slow speed (the cutting speed is about 42mm/min when a 55-wall-thickness steel pipe is cut), high cost (the equipment manufacturing cost is high, the operation consumable cost is high), large occupied area of an operation field and high danger coefficient (high-pressure components exist).
In this regard, embodiments of the present disclosure provide an underwater cutting apparatus and a method of cutting an underwater pipe using the same. The underwater cutting equipment and the method for cutting the underwater pipeline by using the underwater cutting equipment can improve the cutting precision and the cutting speed of the underwater pipeline, reduce the cost, reduce the occupied area and reduce the operation danger.
An underwater cutting apparatus and a method of cutting an underwater pipe using the same provided by the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
An embodiment of the present disclosure provides an underwater cutting device, and fig. 1 is a schematic three-dimensional structure diagram of the underwater cutting device. As shown in fig. 1, the underwater cutting apparatus 1 includes a supporting device 10, a cutting device 20, a monitoring device 30, and a controller 100. The supporting device 10 is configured to fix the underwater cutting device 1 on an inner wall of an underwater pipe, the cutting device 20 is configured to cut the underwater pipe, and the monitoring device 30 is configured to monitor a cutting state of the cutting device 20 and generate cutting state information. The controller 100 is respectively connected with the supporting device 10, the cutting device 20 and the monitoring device 30, and is configured to control the supporting device 10 and the cutting device 20 to move according to the cutting state information generated by the monitoring device 30. For example, the controller 100 is connected to the monitoring device 30 through a cable to receive cutting status information; the controller 100 is connected with the supporting device 10 through a hydraulic line to control the fixing or releasing of the supporting device; the controller 100 is connected to the cutting device 20 through another hydraulic line to control the cutting device to adjust the cutting state. In performing underwater cutting work, the controller 100 may be located in a work area above the water surface, and operated by an operator.
For example, underwater cutting equipment has certain waterproof function, can normally operate in certain water pressure range, and like this, underwater cutting equipment can be lowered under water and carry out the pipeline cutting operation. Fig. 2 is a schematic structural view of hoisting of the underwater cutting device. As shown in fig. 2, the underwater cutting device 1 is lifted by a sling 3, lowered to a predetermined position along the inside of the underwater pipe 2, and then fixed, subjected to further work such as pipe cutting, etc.
In the underwater cutting equipment provided by the embodiment of the disclosure, the support device is preliminarily fixed and further fixed, so that the positioning precision and the positioning speed of the underwater cutting equipment can be improved, and the cutting precision and the cutting speed are improved; through utilizing monitoring devices to monitor cutting device's cutting state and adjusting calibration, can improve cutting operation precision. In addition, the underwater cutting equipment and the underwater cutting method have the beneficial technical effects of low operation cost, small occupied area, small operation risk and the like.
In some examples, as shown in fig. 1, the underwater cutting apparatus further includes a central cartridge 40. The central cylinder 40 is a hollow cylindrical structure, and when the underwater cutting device is operated, the central axis of the central cylinder 40 is approximately coincident with the central axis of the underwater pipeline, where approximately coincident means that the central axis of the central cylinder 40 and the central axis of the underwater pipeline can be completely coincident in an ideal state, and a certain coaxiality or inclination deviation is allowed. The supporting means 10, the cutting means 20 and the monitoring means 30 are disposed outside the central cylinder 40 at a certain interval in the extending direction of the central axis of the central cylinder 40. The inside of the center tube 40 may be provided with electric cables and hydraulic lines. The supporting device 10, the cutting device 20 and the monitoring device 30 are connected to the controller 100 located above the water surface by means of cables or hydraulic lines.
In some examples, the supporting device 10 includes two positioning leg sets 11, 12 disposed at a certain interval in the extending direction of the central axis of the central cylinder 40, and the cutting device 20 and the monitoring device 30 are disposed between the two positioning leg sets 11, 12. For example, as shown in fig. 1, each positioning leg set includes six positioning legs that are evenly distributed around the central axis of the central cartridge 40. It should be noted that the number of the positioning leg sets and the number and distribution of the positioning legs are only examples, and the embodiments of the disclosure include but are not limited thereto. For example, the support means may also include three or more positioning leg sets, each of which may include other numbers of positioning legs, such as 3, 4, etc., and which are also not necessarily evenly distributed around the central axis of the central cartridge 40.
Each positioning leg comprises a hydraulic cylinder and a supporting block which are connected, and the hydraulic cylinder is connected with a controller positioned above the water surface through a hydraulic pipeline. The hydraulic cylinder can be extended under the driving of hydraulic oil in the hydraulic pipeline to press the supporting block on the inner wall of the underwater pipeline so as to fix the underwater cutting equipment; the hydraulic cylinder may also be shortened to move the support block away from the inner wall of the underwater pipeline to release the underwater cutting device.
In some examples, as shown in fig. 1, the cutting device 20 includes a rotary cutter disc 21, the rotary cutter disc 21 being rotatable about a central axis of the central cartridge 40. The rotary cutter disc 21 is provided with a plurality of cutters which are evenly distributed around the central axis of the central cylinder 40, and the cutters cut the underwater pipeline in the rotation process of the rotary cutter disc 21.
In some examples, the cutting device 20 includes a cutting angle adjustment device 23 coupled to the rotary cutter head 21, the cutting angle adjustment device 23 configured to adjust a cutting angle of the cutting device. The cutting angle adjusting means 23 comprises a hydraulic cylinder. The hydraulic cylinder extends and retracts to drive the rotary cutter head 21 to swing, and the axis around which the rotary cutter head swings is the swing central axis of the rotary cutter head. The swing center axis of the rotary cutter head 21 may have a non-zero angle with the center axis of the center cylinder 40, that is, the swing center axis of the rotary cutter head 21 may be different from the rotation center axis of the rotary cutter head 21, for example, the rotation center axis of the rotary cutter head 21 may coincide with the center axis of the center cylinder 40, and the swing center axis of the rotary cutter head 21 may be perpendicular to the center axis of the center cylinder 40. In this manner, the oscillation of the rotary cutter head can change the angle between the plane of rotation of the rotary cutter head and the axial direction of the central cylinder 40, i.e., the angle between the plane of rotation of the rotary cutter head and the axial direction of the underwater pipeline, thereby changing the cutting angle. For example, in the initial state, the rotation plane of the rotary cutter head is perpendicular to the axial direction of the central cylinder 40, the telescopic direction of the hydraulic cylinder forms an included angle of 30-60 degrees with the axial direction of the central cylinder 40, and the hydraulic cylinder can change the included angle between the rotation plane of the rotary cutter head and the axial direction of the central cylinder 40 through telescopic movement, so that the cutting angle of the rotary cutter head is changed. It should be noted that the angle between the extending and retracting direction of the hydraulic cylinder and the axial direction of the central cylinder 40 is an example, and the embodiments of the present disclosure include, but are not limited to, this. For example, if the rotation plane of the rotary cutter head is perpendicular to the axial direction of the center cylinder 40 in the initial state, the cutting angle can be adjusted as long as the extending and retracting direction of the hydraulic cylinder is not perpendicular to the axial direction of the center cylinder 40. Since the axial direction of the center tube 40 substantially coincides with the axial direction of the underwater pipeline, the extending and retracting direction of the hydraulic cylinder is not perpendicular to the axial direction of the center tube 40, and may be considered as being not perpendicular to the axial direction of the underwater pipeline.
In some examples, the cutting device 20 further includes a radial feed adjustment device 24 coupled to the rotary cutter disc 21, the radial feed adjustment device 24 being configured to adjust the amount of radial feed of the rotary cutter disc 21. The radial feed adjustment device 24 can drive the cutters on the rotary cutter head 21 to move along the radial direction of the central cylinder 40, thereby adjusting the cutting diameter of the rotary cutter head 21.
In some examples, the monitoring device 30 may monitor the cutting state of the cutting device 20, for example, the cutting state of the cutting device may include a cutting angle, a cutting feed amount, and the like. The monitoring device 30 may be a camera, which is connected to a display device on the water surface through a cable, and an operator may monitor the state of the underwater cutting device through the display device.
In some examples, the underwater cutting apparatus further comprises a lead-in rack 50. For example, 50 is a circular ring, the circular ring surface is perpendicular to the axial direction of the central cylinder 40, and the diameter of the circular ring is smaller than the inner diameter of the underwater pipeline. In the process of lowering the underwater cutting device, the lead-in frame 50 is located at the lower end and plays a role in guiding.
In some examples, as shown in fig. 1, the underwater cutting apparatus further includes a support pulley 60, a transport skid 70, a sling slide 80, and a cable guide 90. In the process of transferring the underwater cutting equipment, if the underwater cutting equipment swings, the supporting pulley 60 firstly contacts the inner wall of the underwater pipeline, can roll relatively without scraping, and thus the transfer process can be ensured to be smoothly carried out. The transport skid 70 is used to carry and transport the underwater cutting apparatus, is not used for underwater operations, and needs to be separated from other components before underwater operations. The sling slide 80 is used to reduce friction and allow the sling 3 to be smoothly lowered or lifted up along the slide. The cable guide 90 is used to guide the lowering or lifting of the electric cables and hydraulic lines.
An embodiment of the disclosure provides a method for cutting an underwater pipeline by using the underwater cutting device. Fig. 3 is a flowchart of a method of cutting an underwater pipeline using the underwater cutting device, which is shown in fig. 1 and 3, and includes:
step 1: and moving the underwater cutting equipment to the position to be cut of the underwater pipeline.
For example, a subsea cutting device is hoisted. After the equipment state diagnosis is completed and all functions of the equipment are confirmed to be normal, hoisting the underwater cutting equipment to the pipe orifice of the underwater pipeline, checking the operation environment of the area where the underwater pipeline is located, and lowering the underwater cutting equipment along the inner space of the underwater pipeline.
In some examples, the suspended subsea cutting device may pass through a sling slide 80. Fig. 4 is a schematic structural view of the sling slide 80, and as shown in fig. 2 and 4, the sling slide 80 includes a pulley 81, and the pulley 81 may be a fixed pulley. The sling 3 can be a steel wire rope, two ends of the steel wire rope are respectively connected with the main body part of the underwater cutting equipment and the hoisting equipment, and the middle part of the steel wire rope moves around the pulley 81 to realize the lifting or lowering of the underwater cutting equipment. The pulley in the sling slide way is controlled to move along with the steel wire rope, the number of rotating turns of the pulley is detected, and the lowering distance of the steel wire rope can be obtained.
Step 2: and preliminarily fixing the supporting device to preliminarily fix the underwater cutting equipment at the position to be cut.
For example, when the lowering distance of the steel wire rope reaches a preset distance, the underwater cutting equipment reaches the position to be cut, and at the moment, the underwater cutting equipment is preliminarily fixed by adopting the following method: at least part of the hydraulic cylinders of one of the two positioning leg sets of the support device 10 are controlled to extend, so that the support blocks can extrude the inner wall of the underwater pipeline, and the positioning legs abut against the inner wall of the underwater pipeline through reaction force, so that the underwater cutting equipment is fixed in the underwater pipeline. Because the cutting work is not started during preliminary fixing, the reaction force borne by the underwater cutting equipment is small, and therefore the stability requirement can be met only by fixing one positioning supporting leg group on the underwater pipeline, and the adjusting time before the cutting work can be shortened.
And step 3: the cutting state of the cutting device is monitored by the monitoring device and cutting state information is generated.
For example, monitoring the cutting status of the cutting device includes monitoring the cutting operation. The monitoring cutting operation comprises monitoring before operation and monitoring during cutting operation, the monitoring cutting operation can be completed through a monitoring device 30, and the monitoring device 30 can be an underwater camera, for example. The pre-job monitoring includes: inspecting a mechanical scale of the apparatus to calibrate the position of the rotary cutter head of the cutting device 20; and inspecting the level of the device, and calibrating the levelness of the underwater cutting device. Monitoring in the cutting operation includes: monitoring the state of the underwater pipeline and the radial cutting feed amount of the rotary cutter head; monitoring the state of the rotary cutter head, including the inclination angle of the rotary cutter head, the wear state of a cutter and the like; and monitoring the progress of the underwater cutting operation.
And 4, step 4: and adjusting and calibrating the cutting state of the cutting device according to the cutting state information.
In some examples, it is calculated whether the cutting state of the rotating cutter head meets the size and angle requirements based on inspection monitored prior to operation. For example, whether the angle of inclination of the plane of rotation of the rotary cutter head with respect to the central axis of the underwater pipeline satisfies the cutting angle requirement, and whether the underwater pipeline can be cut when the cutter of the rotary cutter head is fully extended.
The calibration cutting state includes a cutting height adjustment and a cutting angle adjustment.
For example, the cutting height refers to the position of the underwater cutting device in the axial direction relative to the underwater pipe. If the cutting height is found to have deviation from the position to be cut through inspection and comparison, the method for adjusting the cutting height comprises the following steps: and retracting the hydraulic cylinders of the positioning support legs to release the underwater cutting equipment from the inner wall of the underwater pipeline, lifting or lowering the underwater cutting equipment according to the detected deviation, inspecting and adjusting the position of the underwater cutting equipment, and extending the hydraulic cylinders of the positioning support legs to fix the underwater cutting equipment again.
For example, the cutting angle refers to the angle of inclination of the plane of rotation of the rotating cutterhead relative to the central axis of the underwater pipeline. The method for adjusting the cutting angle comprises the following steps: the positioning supporting legs are kept in a fixed state, the hydraulic cylinder stretches and retracts to drive the rotary cutter head to swing, the central shaft of the rotary cutter head in a swinging mode is different from the central shaft of the rotary cutter head in a rotating mode, or a non-zero included angle exists between the central shaft of the rotary cutter head in a swinging mode and the central shaft of the underwater pipeline. For example, the central axis of rotation of the rotating cutterhead may coincide with the central axis of the underwater pipeline, and the central axis of oscillation of the rotating cutterhead may be perpendicular to the central axis of the underwater pipeline. Therefore, the swing of the rotary cutter head can change the included angle between the rotary plane of the rotary cutter head and the central shaft of the underwater pipeline, namely, the included angle between the rotary plane of the rotary cutter head and the central shaft of the underwater pipeline is changed, so that the cutting angle is changed. For example, one application scenario for the adjustment of the cutting angle is as follows: under the condition that the underwater pipeline has a certain inclination angle relative to the gravity direction, if the plane where the cuts of the underwater pipeline are located needs to be perpendicular to the gravity direction, the rotating plane of the rotating cutter disc can be adjusted to be perpendicular to the gravity direction by the method for adjusting the cutting angle, and the cutter rotates and cuts the underwater pipeline in the rotating plane of the rotating cutter disc, so that the plane where the cuts of the underwater pipeline are located after cutting is parallel to the rotating plane of the rotating cutter disc, namely perpendicular to the gravity direction. Of course, the above application scenario of the cutting angle adjustment is only an example, and the embodiments of the present disclosure include but are not limited thereto.
And 5: further fixing the support device.
For example, after the cutting height and the cutting angle are corrected, the supporting device 10 is controlled to further fix the underwater cutting equipment, so that the safety and the reliability of the underwater cutting equipment in the cutting process are ensured. Methods for further fixing the underwater cutting device are for example: and controlling at least part of the hydraulic cylinder of the other positioning leg group of the two positioning leg groups to extend, so that the supporting block extrudes the inner wall of the underwater pipeline, and the positioning legs abut against the inner wall of the underwater pipeline through reaction force, thereby further fixing the underwater cutting equipment in the underwater pipeline. Because the underwater cutting equipment is further fixed and then is about to start cutting work, the reacting force borne by the underwater cutting equipment is larger during cutting, and therefore, the stability can be improved by fixing the two positioning supporting leg sets on the underwater pipeline.
Step 6: and cutting the underwater pipeline by using a cutting device.
For example, after the fixing is completed, the cutting device of the underwater cutting apparatus starts to perform cutting. The cutting form is progressive rotary cutting. For example, the rotary cutter head rotates and drives the cutter to rotate so as to cut the inner wall of the underwater pipeline, and the radial feed adjusting device enables the cutter to radially feed for a certain distance every time the rotary cutter head rotates for one circle so as to enlarge the cutting diameter until the underwater pipeline is cut off. The above cutting form is merely an example, and embodiments of the present disclosure include, but are not limited thereto. For example, the progressive rotary cutting may be performed by rotating the rotary cutter head simultaneously with the radial feed of the cutter.
In the method for cutting an underwater pipeline by using the underwater cutting equipment provided by the embodiment of the disclosure, the positioning accuracy and the positioning speed of the underwater cutting equipment can be improved by preliminarily fixing and further fixing the supporting device, so that the cutting accuracy and the cutting speed are improved; through utilizing monitoring devices to monitor cutting device's cutting state and adjusting calibration, can improve cutting operation precision. In addition, the underwater cutting equipment and the underwater cutting method have the beneficial technical effects of low operation cost, small occupied area, small operation risk and the like.
In some embodiments according to the present disclosure, before hoisting and lowering the underwater cutting device, a device state diagnosis step is further included. For example, in this step, the underwater cutting device 1 is lifted off the transport skid 70 and placed vertically above the water surface in the work area, the control lines of the underwater cutting device are connected, and it is checked whether the entire functions of the underwater cutting device can be normally operated.
In some embodiments according to the present disclosure, after the cutting device is used to cut the underwater pipeline, hoisting the cut object is further included. For example, after the underwater pipeline is cut, the underwater pipeline is cut into a first part and a second part, the underwater cutting device is fixed on the inner wall of the first part and separated from the second part, and then the second part is lifted up to a storage area for storage. For example, the first portion is closer to the water surface than the second portion.
The underwater cutting device may also be removed, for example, after lifting the cuttings. And (3) recovering the positioning support legs of the supporting device of the underwater cutting equipment, separating the underwater cutting equipment from the inner wall of the first part of the underwater pipeline, lifting the underwater cutting equipment to an operation area on the water surface, and placing the underwater cutting equipment on a transportation bottom sledge for storage.
The method for cutting the underwater pipeline can be used for cutting the underwater pipeline from the inside, and has the advantages of high cutting precision, high cutting speed, low cost, small occupied area for operation, low operation risk and the like.
The following points need to be explained:
(1) in the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are referred to, and other structures may refer to general designs.
(2) Features of the disclosure in the same embodiment and in different embodiments may be combined with each other without conflict.
The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present disclosure, and shall be covered by the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (17)
1. A method of cutting an underwater pipeline with an underwater cutting device, wherein the underwater cutting device comprises a support means configured to secure the underwater cutting device on an inner wall of the underwater pipeline, a cutting means configured to cut the underwater pipeline, and a monitoring means configured to monitor a cutting status of the cutting means,
the method for cutting the underwater pipeline comprises the following steps:
moving the underwater cutting device to a position to be cut of the underwater pipeline;
preliminarily fixing the supporting device to preliminarily fix the underwater cutting equipment at the position to be cut;
monitoring the cutting state of the cutting device by the monitoring device and generating cutting state information;
adjusting and calibrating the cutting state of the cutting device according to the cutting state information;
further fixing the support device; and
and cutting the underwater pipeline by using the cutting device.
2. A method of cutting an underwater pipeline according to claim 1, wherein the underwater cutting device comprises a central cylinder on which the support means, the cutting means and the monitoring means are provided, the support means comprising two sets of positioning legs arranged spaced apart in the axial direction of the central cylinder,
said preliminary fixing of said support means comprises fixing one of said two sets of positioning legs to an inner wall of said underwater pipeline, and said further fixing of said support means comprises fixing the other of said two sets of positioning legs to an inner wall of said underwater pipeline as well.
3. A method of cutting an underwater pipeline according to claim 1 or 2, wherein the cutting device comprises a rotary cutterhead and a cutting angle adjustment device connected to each other, the cutting angle adjustment device being configured to adjust the cutting angle of the cutting device,
monitoring the cutting status of the cutting device and generating cutting status information by the monitoring device comprises: monitoring a cutting angle of the cutting device by the monitoring device;
adjusting and calibrating the cutting state of the cutting device according to the cutting state information includes: and adjusting and calibrating the cutting angle according to the cutting angle obtained by monitoring.
4. The method of cutting an underwater pipeline according to claim 3, wherein the cutting angle adjusting means includes a first hydraulic cylinder whose telescopic direction is not perpendicular to an axial direction of the underwater pipeline,
adjusting and calibrating the cutting angle according to the monitored cutting angle comprises: and controlling the first hydraulic cylinder to stretch out and draw back so as to adjust the axial included angle between the rotary cutter head and the underwater pipeline.
5. A method of cutting an underwater pipeline according to claim 1, wherein the cutting means comprises a rotary cutterhead,
monitoring the cutting status of the cutting device and generating cutting status information by the monitoring device comprises: monitoring the axial position of the rotary cutter head in the underwater pipeline through the monitoring device;
adjusting and calibrating the cutting state of the cutting device according to the cutting state information includes: and loosening the supporting device, adjusting the position of the rotary cutter head in the axial direction of the underwater pipeline until the position of the rotary cutter head in the axial direction of the underwater pipeline coincides with the position to be cut, and fixing the supporting device.
6. A method of cutting an underwater pipeline according to claim 1, wherein the cutting device includes a rotary cutterhead and a radial feed adjustment device connected to each other, the radial feed adjustment device being configured to adjust the radial feed of the rotary cutterhead,
cutting the underwater pipeline using the cutting device includes: and monitoring the radial feeding amount of the rotary cutter head through the monitoring device, and adjusting the radial feeding amount of the rotary cutter head through the radial feeding adjusting device.
7. The method of cutting an underwater pipeline as claimed in claim 6, wherein cutting the underwater pipeline with the cutting device further comprises: and monitoring the state of the rotary cutter head and the progress of the cutting operation by the monitoring device.
8. The method of cutting an underwater pipeline according to claim 1,
prior to moving the underwater cutting device to a position to be cut of the underwater pipeline, the method of cutting an underwater pipeline further comprises:
checking whether the functions of the supporting device, the cutting device and the monitoring device are normal.
9. A method of cutting an underwater pipeline as claimed in claim 1, wherein moving the underwater cutting device to a position to be cut of the underwater pipeline comprises: hoisting the underwater cutting equipment to the pipe orifice of the underwater pipeline, checking the operation environment of the area where the underwater pipeline is located, lowering the underwater cutting equipment along the inner space of the underwater pipeline, and measuring the lowering distance of the underwater cutting equipment until the underwater cutting equipment reaches the position to be cut.
10. The method of cutting an underwater pipeline according to claim 1, wherein the support device comprises a second hydraulic cylinder and a support block, the second hydraulic cylinder being configured to drive the support block in a radial direction of the underwater pipeline,
preliminarily fixing the supporting device includes: and adjusting the second hydraulic cylinder to extend out along the radial direction of the underwater pipeline until the supporting block presses the inner wall of the underwater pipeline, so that the underwater cutting equipment is fixed on the inner wall of the underwater pipeline.
11. The method of cutting an underwater pipeline as claimed in claim 1, further comprising:
after the underwater pipeline is cut into a first part and a second part, fixing the underwater cutting equipment on the first part, separating the underwater cutting equipment from the second part, and hoisting and recovering the second part;
and separating the underwater cutting equipment from the first part, and hoisting and recovering the underwater cutting equipment.
12. An underwater cutting apparatus comprising:
a central barrel;
a support device disposed on the central cylinder configured to secure the underwater cutting apparatus on an inner wall of the underwater pipeline;
a cutting device disposed on the central cylinder configured to cut the underwater pipeline;
a monitoring device disposed on the central barrel configured to monitor a cutting state of the cutting device and generate cutting state information; and
a controller connected with the supporting device and the cutting device and configured to control the supporting device and the cutting device to move according to the cutting state information.
13. An underwater cutting apparatus as claimed in claim 12 wherein the cutting means comprises an interconnected rotary cutterhead and a cutting angle adjustment means configured to adjust the cutting angle of the cutting means.
14. The underwater cutting device of claim 13, wherein the cutting angle adjusting means includes a first hydraulic cylinder, the first hydraulic cylinder swings the rotary cutter head by telescoping, so as to adjust an included angle between the rotary cutter head and an axial direction of the underwater pipeline, and a telescoping direction of the first hydraulic cylinder is not perpendicular to the axial direction of the underwater pipeline.
15. An underwater cutting apparatus as claimed in claim 13 wherein the cutting means further comprises a radial feed adjustment means connected to the rotary cutterhead, the radial feed adjustment means being configured to adjust the amount of radial feed of the rotary cutterhead.
16. An underwater cutting device as claimed in claim 12 wherein the support means comprises a second hydraulic cylinder and a support block, the second hydraulic cylinder being configured to drive the support block in a radial direction of the underwater pipe to abut against or disengage from the inner wall of the underwater pipe.
17. An underwater cutting apparatus as claimed in any of claims 12 to 16 wherein the underwater cutting apparatus comprises a central barrel on which the support means, the cutting means and the monitoring means are disposed at intervals in the axial direction of the central barrel, the support means comprising two sets of location legs disposed spaced apart in the axial direction of the central barrel, the cutting means and the monitoring means being disposed between the two sets of location legs.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111093845.6A CN113751785A (en) | 2021-09-17 | 2021-09-17 | Underwater cutting apparatus and method of cutting underwater pipeline using the same |
| PCT/CN2021/124677 WO2023039986A1 (en) | 2021-09-17 | 2021-10-19 | Underwater cutting apparatus, and method for cutting underwater pipeline by using underwater cutting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111093845.6A CN113751785A (en) | 2021-09-17 | 2021-09-17 | Underwater cutting apparatus and method of cutting underwater pipeline using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113751785A true CN113751785A (en) | 2021-12-07 |
Family
ID=78796262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111093845.6A Pending CN113751785A (en) | 2021-09-17 | 2021-09-17 | Underwater cutting apparatus and method of cutting underwater pipeline using the same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113751785A (en) |
| WO (1) | WO2023039986A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2023039986A1 (en) | 2023-03-23 |
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Application publication date: 20211207 |