CN106975638B - Cleaning device for coating of marine pipe - Google Patents
Cleaning device for coating of marine pipe Download PDFInfo
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- CN106975638B CN106975638B CN201710252242.3A CN201710252242A CN106975638B CN 106975638 B CN106975638 B CN 106975638B CN 201710252242 A CN201710252242 A CN 201710252242A CN 106975638 B CN106975638 B CN 106975638B
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- pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/023—Cleaning the external surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
Abstract
The invention relates to a cleaning device for a coating of a marine pipe, which comprises: the clamping mechanism is used for clamping the outside of the sea pipe and can move back and forth along the axial direction of the sea pipe; the rotary frame is arranged on the clamping mechanism and can rotate around the outer ring of the sea pipe back and forth; and the high-pressure nozzle is arranged on the rotary frame and is opposite to the outer ring of the sea pipe so as to spray and cut the coating on the outer wall surface of the sea pipe when rotating along with the rotary frame. The rotary frame of the cleaning device can rotate around the outer ring of the marine pipe, the high-pressure nozzle is connected with a high-pressure water source through a pipeline, so that the high-pressure nozzle can cut and clean the coating on the periphery of the marine pipe in the rotating process, and meanwhile, the high-pressure nozzle and the rotary frame can also move along with the clamping mechanism in the axial direction of the marine pipe, so that the all-around and axial all-around cutting and cleaning of the marine pipe can be realized.
Description
Technical Field
The invention relates to maintenance equipment of a marine petroleum pipeline, in particular to a cleaning device for a coating of a marine pipe.
Background
The submarine pipeline is an important component of an offshore oil and gas gathering, transporting, storing and transporting system, is an ocean engineering with high investment and large risk, plays an important role in the development of offshore oil and gas resources, is like a 'life line' of an offshore oil and gas field, and the safe and normal operation of the submarine pipeline is an important guarantee for the safe production of the offshore oil and gas field.
The surface layer of the submarine pipeline is usually provided with a concrete covering layer and an anticorrosive coating (FBE hot-melt epoxy resin, CTE coal tar enamel paint and the like), and with the increase of the operation life of the submarine pipeline, many submarine pipelines can be damaged in different degrees due to the influence of natural environment load factors or human factors such as medium corrosion, waves, storm surge, ocean current, earthquake and the like. Therefore, a lot of potential demands for the maintenance of the marine pipe exist in the field of marine engineering, and the maintenance of the marine pipe usually needs to be continued to the next step after the surface coating of the marine pipe is cleaned, so that the design of efficient cleaning equipment for the surface coating of the marine pipe is of great significance to the maintenance of submarine pipelines and the development of deep-water marine oil.
Compared with the development of submarine pipelines in China started later internationally in other countries, about 70% of submarine pipeline service time in China is still less than 10 years at present, and the number of submarine pipeline maintenance projects in China is less than 20 by 2015, but pipeline damage is caused by the increase of the pipeline service time and the influence of silt, tide, hurricane and the like, and more submarine pipeline maintenance projects are generated in the future.
At present, our country has relatively short experience and technology for maintaining submarine pipelines, and in the past marine pipeline maintenance project, the traditional method for cleaning the concrete balance weight layer on the surface of the marine pipeline mainly comprises the steps of breaking the concrete layer by using a hydraulic cutting saw underwater, and then cooperatively using a hydraulic air pick or a diver to directly and manually beat and strip the concrete covering layer by holding a hammer by hand. When the traditional hydraulic cutting saw method is adopted for cutting and cleaning, the cutting tool can cut the body of the marine pipe steel pipe due to the fact that the feeding amount of the cutting tool is too deep, and therefore the damage and even leakage accidents of the marine pipe body can be caused.
Disclosure of Invention
The invention aims to provide an improved cleaning device for a coating of a marine pipe.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a subsea pipeline coating cleaning device comprising:
the clamping mechanism is used for clamping the sea pipe and can move back and forth along the axial direction of the sea pipe;
the rotary frame is arranged on the clamping mechanism and can rotate around the outer ring of the sea pipe back and forth;
and the high-pressure nozzle is arranged on the rotary frame and is opposite to the outer ring of the sea pipe so as to spray and cut the coating on the outer wall surface of the sea pipe when rotating along with the rotary frame.
Preferably, the clamping mechanism comprises a clamping body, the clamping body comprises a bayonet with an inverted U-shaped or C-shaped or semicircular cross section, and an opening of the bayonet is buckled downwards on the upper side of the sea pipe.
Preferably, the revolving frame is of a semi-closed structure and is C-shaped or semicircular, the revolving frame is clamped outside the sea pipe, the number of the high-pressure nozzles is two, and the high-pressure nozzles are staggered by 180 degrees in the circumferential direction of the revolving frame.
Preferably, the clamping mechanism is provided with an arc-shaped track and a first driving mechanism, the arc-shaped track is arranged outside the sea pipe and arranged along the circumferential direction of the sea pipe, and the first driving mechanism is correspondingly matched with the arc-shaped track and the revolving frame respectively so as to drive the revolving frame to rotate around the outer ring of the sea pipe along the arc-shaped track.
Preferably, the arc-shaped track is circumferentially provided with clamping teeth, the first driving mechanism comprises a supporting seat and a first driving motor arranged on the supporting seat, the revolving frame is arranged on the supporting seat, and an output shaft of the first driving motor is meshed with the clamping teeth on the arc-shaped track, so that the first driving mechanism drives the revolving frame to rotate along the arc-shaped track.
Preferably, the support seat comprises a guide shaft arranged along the axial direction, and the revolving frame is mounted on the guide shaft in a manner of moving back and forth along the axial direction;
and a second driving mechanism for driving the rotating frame to move back and forth on the guide shaft is arranged on the rotating frame and/or the supporting seat.
Preferably, the clamping mechanism further comprises a roller arranged on the upper side of the bayonet and a pipe holding mechanism arranged on the clamping main body, the roller is matched with the upper side of the sea pipe, and the clamping main body is further provided with a third driving mechanism for driving the roller to roll along the axial direction of the sea pipe;
the pipe holding mechanism and the rollers are distributed at intervals along the circumference of the sea pipe so as to clamp the sea pipe and position the clamping main body.
Preferably, embrace a tub mechanism and include that two embrace a tub unit, two embrace a tub unit with the gyro wheel is in the even interval distribution in circumference of sea pipe, it includes adjusting part and sets up to embrace a tub unit from the driving wheel on the adjusting part, from the driving wheel with the sea pipe is relative and can be followed the axial roll of sea pipe, adjusting part adjusts the position from the driving wheel, so that let can support from the driving wheel and lean on the sea pipe, with the gyro wheel is embraced tightly the sea pipe.
Preferably, the outer side surfaces of the roller and the driven wheel are provided with concave structures along the circumference, and the shapes of the concave structures correspond to the arc-shaped shapes of the outer wall surfaces of the sea pipes.
Preferably, the clamping body is further provided with a distance measuring sensor for detecting the distance from the high-pressure nozzle to the surface of the marine pipe, and an adjusting unit for adjusting the distance from the high-pressure nozzle to the surface of the marine pipe according to the measured distance.
The implementation of the cleaning device for the coating of the marine pipe has the following beneficial effects: the rotary frame of the cleaning device can rotate around the outer ring of the marine pipe, the high-pressure nozzle is connected with a high-pressure water source through a pipeline, so that the high-pressure nozzle can cut and clean the coating on the periphery of the marine pipe in the rotating process, and meanwhile, the high-pressure nozzle and the rotary frame can also move along with the clamping mechanism in the axial direction of the marine pipe, so that the all-around and axial all-around cutting and cleaning of the marine pipe can be realized.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic side view of the internal structure of a marine vessel coating cleaning apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic axial view of the turret and the arcuate track of the marine pipe coating cleaning apparatus of FIG. 1 in cooperation with a first drive mechanism;
FIG. 3 is a schematic view of the turret of FIG. 2 after rotation through 180 degrees;
fig. 4 is a schematic structural diagram of the roller and the pipe embracing mechanism of the device for cleaning the coating of the marine pipe in fig. 1 clamped on the circumference of the marine pipe.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the device for cleaning the coating of the marine pipe 4 in a preferred embodiment of the present invention comprises a clamping mechanism 1, a turret 2 and a high-pressure nozzle 3, wherein the clamping mechanism 1 is used for clamping the marine pipe 4 and can move back and forth along the axial direction of the marine pipe 4; the revolving frame 2 is arranged on the clamping mechanism 1 and can rotate around the outer ring of the sea pipe 4 back and forth; the high-pressure nozzle 3 is arranged on the rotary frame 2 and is opposite to the outer ring of the sea pipe 4 so as to spray and cut the coating on the outer wall surface of the sea pipe 4 when rotating along with the rotary frame 2.
Cleaning device's reversing frame 2 can rotate around the outer lane of submarine pipeline 4, and high pressure nozzle 3 passes through pipe connection high pressure water source, makes high pressure nozzle 3 can realize the cutting clearance to 4 weeks of submarine pipeline coatings at the rotation in-process, and simultaneously, high pressure nozzle 3 and reversing frame 2 can also be along with fixture 1 at the axial displacement of submarine pipeline 4 to can realize 4 weeks of submarine pipeline and the omnidirectional cutting clearance of axial.
In order to reduce the construction risk during the maintenance of the marine pipe 4 and improve the cleaning efficiency of the surface of the marine pipe 4 during the maintenance of the marine pipe 4, the cleaning device usually adopts a high-pressure water jet technology, so that high-pressure water is jetted from the high-pressure nozzle 3 to the coating outside the marine pipe 4. The high-pressure water jet can effectively remove the concrete covering layer and the CTE (coefficient of thermal expansion) anticorrosive coating on the surface layer of the marine pipe 4, the cleaning device can be matched with the jet flow for guiding high-pressure water, can be clamped and stabilized on the marine pipe 4, and can crawl along the marine pipe 4 when necessary.
This 4 coating cleaning device of submarine pipeline can guide the water jet to last even impact 4 surfaces at the submarine pipeline so that the concrete layer cutting to cleaning device can be according to the different adjustment jet distance of clearance material, and running position and running distance etc. are very convenient, easily operate, can more effectual performance high pressure water jet's effect.
The clamping mechanism 1 comprises a clamping body 11, and in some embodiments, the clamping body 11 comprises a U-shaped bayonet 111 with an inverted cross section, and the opening of the bayonet 111 is buckled downwards on the sea pipe 4. In other embodiments, the cross section of the clamping main body 11 may also be an inverted C-shaped or semicircular bayonet 111, and an inverted U-shaped, C-shaped or semicircular structure may facilitate the clamping of the clamping main body 11 to the marine vessel 4 from the upper side of the marine vessel 4 after being lifted.
The cleaning device can adopt a bilateral symmetry structure design, so that the cleaning device can keep vertical balance in integral hoisting water entering and underwater. Of course, in other embodiments, the clamping body 11 may be formed by splicing a plurality of components and then sleeved around the sea pipe 4.
Furthermore, the revolving frame 2 is a semi-closed structure and is C-shaped, and the revolving frame 2 is clamped outside the submarine pipe 4. Preferably, the high-pressure nozzles 3 comprise two high-pressure nozzles, the high-pressure nozzles are staggered by 180 degrees in the circumferential direction of the rotary frame 2, 360-degree circumambulation of the high-pressure nozzles 3 and the high-pressure water pipe ring sea pipe 4 can be realized after the rotary frame 2 rotates for a half circle, and the cutting and cleaning of the whole circle of the outer coating of the sea pipe 4 can be completed. The revolving frame 2 rotates back and forth, and the pipeline connected with the high-pressure nozzle 3 can be prevented from winding.
In other embodiments, the turret 2 may also be semicircular, and when the turret 2 is semicircular, two high-pressure nozzles 3 may be respectively disposed at both ends of the turret 2 so as to be staggered by 180 degrees in the circumferential direction of the turret 2.
In addition, the revolving frame 2 can also be an annular structure formed by assembling a plurality of components and is sleeved on the outer ring of the sea pipe 4, so that only one high-pressure nozzle 3 can be arranged on the revolving frame 2. Of course, when the turret 2 is a semi-closed mechanism or a ring structure, the number of the high-pressure nozzles 3 may be correspondingly increased. The high-pressure nozzle 3 can adopt a single-nozzle working mode or a double-nozzle working mode, and the high-pressure nozzle 3 can adopt two working modes of automatic operation and manual operation.
The clamping mechanism 1 is provided with an arc-shaped track 12 and a first driving mechanism 13, wherein the arc-shaped track 12 is arranged outside the marine pipe 4 and is arranged along the circumferential direction of the marine pipe 4. The inner diameter of the arc-shaped track 12 is larger than the outer diameter of the outer ring of the sea pipe 4, so that collision between parts can be avoided during cleaning and cutting. The first driving mechanism 13 is respectively matched with the arc-shaped track 12 and the revolving frame 2 correspondingly so as to drive the revolving frame 2 to rotate around the outer ring of the sea pipe 4 along the arc-shaped track 12. Preferably, the arc-shaped track 12 and the axis of the turret 2 are concentric with the axis of the sea pipe 4, so that the distance between the arc-shaped track and the outer wall surface of the sea pipe 4 is uniform when the turret 2 rotates.
Further, the arc-shaped rail 12 is provided with a latch 121 along the circumferential direction. The first driving mechanism 13 comprises a supporting base 131 and a first driving motor 132 installed on the supporting base 131, the turret 2 is installed on the supporting base 131, and an output shaft of the first driving motor 132 is engaged with the latch 121 on the arc-shaped rail 12, so that the first driving mechanism 13 drives the turret 2 to rotate along the arc-shaped rail 12. Preferably, the first drive motor 132 is a hydraulic motor.
In other embodiments, the turret 2 may be directly mounted on the first driving mechanism 13 to rotate with the first driving mechanism 13. Or, the clamping mechanism 1 is provided with an arc-shaped guide rail, the arc-shaped guide rail is arranged outside the sea pipe 4 and arranged along the circumferential direction of the sea pipe 4, the revolving frame 2 is provided with a latch 121 along the circumferential direction, an output shaft of the first driving mechanism 13 is meshed with the latch 121 of the revolving frame 2, and the revolving frame 2 is driven to rotate around the sea pipe 4 along the arc-shaped guide rail when the output shaft rotates.
In some embodiments, in order that the turret 2 may also move in the axial direction of the sea pipe 4 without moving the clamping body 11, the support base 131 comprises a guide shaft 1311 arranged in the axial direction, and the turret 2 is mounted on the guide shaft 1311 so as to be movable back and forth in the axial direction.
Further, the revolving frame 2 is provided with a second driving mechanism 21 for driving the revolving frame 2 to move back and forth on the guide shaft 1311, and usually, the second driving mechanism 21 is a cylinder for driving the revolving frame 2 to move on the guide shaft 1311. In other embodiments, the second driving mechanism 21 may also be disposed on the supporting base 131, and the revolving frame 2 is driven by a telescopic structure such as a piston rod to move back and forth on the guiding shaft 1311.
As shown in fig. 4, in some embodiments, the clamping mechanism 1 further includes a roller 14 disposed on the upper side of the bayonet 111, and a pipe embracing mechanism 15 disposed on the clamping body 11. The roller 14 is matched with the upper side of the sea pipe 4, the clamping main body 11 is further provided with a third driving mechanism 16 for driving the roller 14 to roll along the axial direction of the sea pipe 4, generally, the third driving mechanism 16 is also an oil cylinder for driving the roller 14 to roll, and the rolling of the roller 14 drives the whole cleaning device to move in the axial direction of the sea pipe 4. In other embodiments, the cleaning device may be moved axially in the sea pipe 4 by an external device, and the roller 14 rolls on the sea pipe 4 during the movement.
Preferably, the pipe embracing mechanism 15 and the rollers 14 are spaced along the circumference of the sea pipe 4, and form a multi-point clamp on the circumference of the sea pipe 4, so as to clamp the sea pipe 4 and position the clamping body 11. Normally, two sets of pipe embracing mechanisms 15 and rollers 14 are provided in the longitudinal direction of the clamp body 11 to ensure balance on the sea pipe 4.
Further, the pipe embracing mechanism 15 includes two pipe embracing units 151, and the two pipe embracing units 151 and the rollers 14 are uniformly distributed at intervals around the circumference of the sea pipe 4 to form three-point positioning and clamping. The pipe embracing unit 151 includes an adjusting assembly 1511 and a driven wheel 1512 provided on the adjusting assembly 1511, the driven wheel 1512 being opposed to the sea pipe 4 and being capable of rolling along the axial direction of the sea pipe 4.
The adjustment assembly 1511 adjusts the position of the driven wheel 1512 so that the driven wheel 1512 can rest on the sea pipe 4 and the rollers 14 hug the sea pipe 4. The adjusting assembly 1511 may be a cylinder or the like, and the driven wheel 1512 is disposed at an end of a piston rod of the cylinder to move the driven wheel 1512.
When clamping is needed, the driven wheel 1512 is tightly abutted against the outer wall surface of the marine pipe 4, and forms three-point clamping with the roller 14 outside the marine pipe 4, so that the clamping stability is ensured. When the cleaning device needs to move axially, the adjusting assembly 1511 can allow the driven wheel 1512 to move away from the sea pipe 4 for loosening, and when the roller 14 rolls, the driven wheel 1512 can also move axially along the sea pipe 4.
Preferably, the outer side surfaces of the roller 14 and the driven wheel 1512 are provided with concave structures along the circumference, and the shapes of the concave structures correspond to the arc shape of the outer wall surface of the sea pipe 4, so that the roller 14 and the driven wheel 1512 can clamp the outer wall surface of the sea pipe 4 more stably. In other embodiments, the outer side surfaces of the roller 14 and the driven wheel 1512 may also be straight surfaces arranged along the axial direction, so as to ensure stable clamping outside the marine pipe 4.
In some embodiments, the clamping body 11 is further provided with a distance measuring sensor for detecting a distance from the high pressure nozzle 3 to the surface of the sea pipe 4, and an adjusting unit for adjusting a distance between the high pressure nozzle 3 and the surface of the sea pipe 4 according to the measured distance. Usually, a distance measuring sensor is arranged on the high-pressure nozzle 3, and the position can adjust the spraying distance according to different coating materials to be cleaned, thereby realizing quantitative control of the cleaning depth. The adjusting unit can also be driven by a hydraulic motor to drive the high-pressure nozzle 3 to move. The quantitative control of the surface cleaning speed of the marine vessel 4 can be realized by combining the corresponding control moving speeds of the first driving mechanism 13, the second driving mechanism 21 and the third driving mechanism 16.
Hydro-cylinder, pipeline, motor etc. on the cleaning device can make the integrated design of hydraulic pressure pipeline through special control valve case centralized control, adopt quick-operation joint to set up, and it is quick convenient when carrying out hydraulic pressure pipeline dismantlement and installation. The cleaning device adopts waterproof sealing and corrosion-resistant design in a whole set, so that the equipment can well operate in an underwater environment.
The invention has the following main beneficial effects:
1) the efficiency is high: the hydraulic drive is adopted, the operation can be continued, and compared with the traditional cleaning method, a great deal of time can be saved.
2) The safety is high: the cleaning device can avoid the risk of contact between people and the high-pressure water jet, and when the high-pressure water jet is applied, the nozzle of the high-pressure water equipment is designed and installed on the rotary frame 2, and the rotary frame 2 is designed with the circumference with the inherent stroke path being larger than the outer diameter of the sea pipe 4, so that no mechanical collision can occur during cleaning and cutting operation, the risk of damaging seabed facilities does not exist, and the safety coefficient is greatly improved.
3) Extensive applicability, the pipe diameter scope that the device is applicable and the applicable depth of water scope all wider.
4) The method is simple, the equipment adopts hydraulic control, and the operation is simple.
5) The cleaning effect of the sea pipe 4 is good, when the sea pipe is cleaned underwater, the clamping mechanism 1 drives high-pressure water jet to uniformly strike the surface of the sea pipe 4 under the drive of hydraulic pressure, and the cleaning effect is better.
It is to be understood that the above-described respective technical features may be used in any combination without limitation.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. An apparatus for cleaning coating on marine pipe, comprising:
the clamping mechanism (1) is used for clamping the outside of the sea pipe (4) and can move back and forth along the axial direction of the sea pipe (4); the clamping mechanism (1) comprises a clamping main body (11), the clamping main body (11) comprises a bayonet (111) with an inverted U-shaped or C-shaped or semicircular cross section, and an opening of the bayonet (111) is downwards buckled on the upper side of the sea pipe (4);
the clamping mechanism (1) further comprises a roller (14) arranged on the upper side of the bayonet (111) and a pipe embracing mechanism (15) arranged on the clamping main body (11), the roller (14) is matched with the upper side of the sea pipe (4), and the clamping main body (11) is further provided with a third driving mechanism (16) for driving the roller (14) to roll along the axial direction of the sea pipe (4);
the pipe embracing mechanism (15) and the rollers (14) are distributed at intervals along the circumference of the sea pipe (4) so as to clamp the sea pipe (4) and position the clamping main body (11);
the pipe embracing mechanism (15) comprises two pipe embracing units (151), the two pipe embracing units (151) and the rollers (14) are uniformly distributed around the sea pipe (4) at intervals, each pipe embracing unit (151) comprises an adjusting component (1511) and a driven wheel (1512) arranged on the adjusting component (1511), the driven wheel (1512) is opposite to the sea pipe (4) and can roll along the axial direction of the sea pipe (4), the position of the driven wheel (1512) is adjusted by the adjusting component (1511) so that the driven wheel (1512) can abut against the sea pipe (4), and the rollers (14) embrace the sea pipe (4) tightly;
the rotary frame (2) is arranged on the clamping mechanism (1) and can rotate around the outer ring of the sea pipe (4) back and forth;
the clamping mechanism (1) is provided with an arc-shaped track (12) and a first driving mechanism (13), the arc-shaped track (12) is arranged outside the sea pipe (4) and arranged along the circumferential direction of the sea pipe (4), and the first driving mechanism (13) is correspondingly matched with the arc-shaped track (12) and the revolving frame (2) respectively so as to drive the revolving frame (2) to rotate around the outer ring of the sea pipe (4) along the arc-shaped track (12);
the arc-shaped rail (12) is circumferentially provided with clamping teeth (121), the first driving mechanism (13) comprises a supporting seat (131) and a first driving motor (132) arranged on the supporting seat (131), the rotary frame (2) is arranged on the supporting seat (131), and an output shaft of the first driving motor (132) is meshed with the clamping teeth (121) on the arc-shaped rail (12), so that the first driving mechanism (13) drives the rotary frame (2) to rotate along the arc-shaped rail (12);
the supporting seat (131) comprises a guide shaft (1311) arranged along the axial direction, and the rotary frame (2) is mounted on the guide shaft (1311) in a manner of moving back and forth along the axial direction; a second driving mechanism (21) which drives the rotary frame (2) to move back and forth on the guide shaft (1311) is arranged on the rotary frame (2) and/or the supporting seat (131);
the high-pressure nozzles (3) comprise two high-pressure nozzles, are staggered by 180 degrees in the circumferential direction of the rotary frame (2), and are opposite to the outer ring of the sea pipe (4) so as to spray and cut the coating on the outer wall surface of the sea pipe (4) when rotating along with the rotary frame (2).
2. The marine pipe coating cleaning device according to claim 1, characterized in that the turret (2) is a semi-closed structure, in a C-shape or semi-circular shape.
3. The cleaning device for the coating of the marine pipe as claimed in claim 1, wherein the outer side surfaces of the roller (14) and the driven wheel (1512) are provided with concave structures along the circumference, and the shape of the concave structures corresponds to the arc shape of the outer wall surface of the marine pipe (4).
4. Marine pipe coating cleaning apparatus according to any one of claims 1 to 2, wherein a distance measuring sensor for detecting a distance from the high pressure nozzle (3) to the surface of the marine pipe (4) and an adjusting unit for adjusting a distance from the high pressure nozzle (3) to the surface of the marine pipe (4) according to the measured distance are further provided on the clamping body (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710252242.3A CN106975638B (en) | 2017-04-18 | 2017-04-18 | Cleaning device for coating of marine pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710252242.3A CN106975638B (en) | 2017-04-18 | 2017-04-18 | Cleaning device for coating of marine pipe |
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| CN106975638A CN106975638A (en) | 2017-07-25 |
| CN106975638B true CN106975638B (en) | 2020-01-10 |
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