CN114811187B

CN114811187B - Dry-type work cabin is changed to sea pipe riser

Info

Publication number: CN114811187B
Application number: CN202210434343.3A
Authority: CN
Inventors: 艾明刚; 李民强; 胡震亮; 杨光
Original assignee: Shandong Haisheng Ocean Engineering Group Co ltd
Current assignee: Shandong Haisheng Ocean Engineering Group Co ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-11-01
Anticipated expiration: 2042-04-24
Also published as: CN114811187A

Abstract

The invention discloses a dry type working cabin for replacing a marine riser, which relates to the technical field of replacement of the marine riser, and comprises an original marine riser, a new marine riser, an outer cabin, an inner cabin, a fixing mechanism, a moving mechanism, a rotating mechanism and a balancing mechanism, wherein the outer cabin is divided into a left space and a right space, the middle part of the left space is separated by a sliding door, the inner cabin is fixedly installed in the right space of the outer cabin, mounting plates are arranged at the upper end and the lower end of the left space of the outer cabin, clamping components are arranged on the mounting plates and used for clamping the original marine riser, the moving mechanism used for moving the original marine riser after being cut off is arranged on the mounting plates, a toothed ring is rotatably installed in the right space of the outer cabin and provided with a plurality of arc-shaped grooves, each arc-shaped groove is provided with at least one empty groove, the arc-shaped grooves can clamp the cut original marine riser or the new marine riser, and the balancing mechanism used for assisting the lifting and balancing of the dry type working cabin replacement of the marine riser is arranged at the lower end of the right side of the outer cabin.

Description

Dry-type work cabin is changed to sea pipe riser

Technical Field

The invention relates to the technical field of replacement of a marine riser, in particular to a dry-type working cabin for replacing a marine riser.

Background

The invention relates to a device for maintaining and replacing a marine platform crude oil riser, which is mainly used for conveying oil or natural gas and the like, wherein the maintenance of the marine oil riser is divided into an above-water maintenance and replacement technology and an underwater maintenance and replacement technology according to different damage positions, the above-water maintenance and replacement part is replaced by adopting a conventional method, the marine oil riser of the underwater part is replaced by adopting manual diving equipment or air diving technology, the replacement is difficult due to the fact that the weight of the marine oil riser is larger, batch replacement cannot be realized, and the underwater replacement of the marine oil riser is difficult to carry out, china patent with the publication number of CN206206777U discloses a device for maintaining and replacing the marine platform crude oil riser.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: a dry-type work chamber for replacing a riser of a marine vessel is provided.

Aiming at the technical problems, the technical scheme provided by the invention is as follows: a dry-type working cabin for replacing a marine pipe riser comprises an original marine pipe riser, a new marine pipe riser, an outer cabin, an inner cabin, a fixing mechanism, a moving mechanism, a rotating mechanism and a balancing mechanism, wherein two ends of the new marine pipe riser are of a telescopic double-layer structure; the left side of the outer cabin is rotatably provided with an opening plate, the outer cabin is divided into a left space and a right space, the middle space is separated by a sliding door, the right space of the outer cabin is fixedly provided with an inner cabin, and the lower end of the left space of the outer cabin is provided with a water pump for pumping seawater out; the opening plate can be with former sea pipe riser card in outer deck left side space, both ends are equipped with the mounting panel about the outer deck left side space, are equipped with clamping component on the mounting panel for press from both sides tight former sea pipe riser, outer deck right side space rotates the installation ring gear, the ring gear has a plurality of arcs, the arc has a dead slot at least, but former sea pipe riser or new sea pipe riser that the arc chucking cut off, outer deck right side lower extreme be equipped with be used for assisting the sea pipe riser to change dry-type work cabin lift and balanced balance mechanism.

The mounting panel on fixed mounting fixed plate, the cylinder support, the fixed plate divide into two-layerly, the fixed plate lower floor rotates the installation lower gear, the fixed plate upper strata rotates the installation gear, the first end of intermediate tube under the fixed installation of upper gear, lower intermediate tube has three limits, two adjacent limits are perpendicular, the first end of gear fixed mounting control shaft down, the control shaft second end is connected with lower inner tube through transmission assembly, lower intermediate tube inside rotates the installation lower inner tube, intermediate tube second end slidable mounting is gone up to lower intermediate tube second, upper intermediate tube inside rotates the installation upper inner tube, upper inner tube and lower inner tube sliding connection, upper inner tube upper end fixed mounting electric saw I, fixed mounting electric saw II on the lower inner tube, electric saw I, electric saw II is used for cutting off former sea pipe riser, the upper outer tube of upper intermediate tube outside fixed mounting, the lower outer tube of lower intermediate tube outside fixed mounting lower outer tube, be equipped with the upper clamping jaw on the upper outer tube, be equipped with lower clamping jaw on the lower outer tube, the clamping jaw, the outer tube passes through controller open and close sliding connection.

Furthermore, an air cylinder is fixedly installed on the air cylinder support, a moving motor is fixedly installed on an expansion rod of the air cylinder, an output shaft of the moving motor coaxially rotates a control gear, when the air cylinder extends, the control gear is meshed with a lower gear, and when the air cylinder compresses, the control gear is meshed with an upper gear and is used for providing power for the movement of the cut-off marine riser.

Furthermore, the toothed ring is meshed with the transmission gear, a waterproof board is fixedly installed in the right space of the outer cabin, the waterproof board is fixedly installed on the lower surface of the inner cabin, the transmission gear is rotatably installed on the waterproof board, the rotating motor is fixedly installed on the waterproof board, an incomplete gear is fixedly installed on a rotating shaft of the rotating motor, and a toothed part of the incomplete gear is meshed with the toothed ring and is used for the intermittent rotation of the toothed ring.

Further, four cassettes of inside fixed mounting of interior cabin, fixed mounting expansion plate on the cassette, expansion plate central point puts and rotates installation control lever, the right side space of outer cabin surface fixed mounting ballast piece, the control lever outside is equipped with pressurized-water board, ballast piece, outer cabin right side lower extreme is equipped with a plurality of limbers, goes up and down through the big or small control that changes buoyancy.

Further, ballast piece bottom be equipped with the vortex groove, the ballast piece lower extreme rotates the installation ring, the first end of fixed mounting connecting rod on the ring, connecting rod second end fixed mounting connector, the rotational mounting connector of ballast piece, slidable mounting balancing piece on the connecting rod, the balancing piece upper end is established the vortex inslot, the control lever lower extreme is equipped with the card key, the ring is equipped with the draw-in groove, card key length and ring length the same, prevent that the sea from surging secretly, keep balance.

Furthermore, the control rod is provided with two sections of threads in opposite directions, a polished rod is arranged between the two sections of threads, the lower end inside the right side of the inner cabin is provided with a water pressing plate in a sliding mode, when the water pressing plate is connected with the upper section of threads, the water pressing plate moves upwards, when the water pressing plate is connected with the lower section of threads, the water pressing plate moves downwards, the length of the clamping key is smaller than that of the polished rod, and when the clamping key is connected with the circular ring, the water pressing plate is in contact with the polished rod and is used for assisting the balance and lifting of the working cabin.

Further, interior cabin upper end be equipped with the door, the interior cabin corresponds push-and-pull door department be equipped with the viewing aperture, viewing aperture top be equipped with the controller, the workman changes the sea pipe riser through the controller, the interior cabin is inside to be equipped with and to be used for the required indispensable article of workman, the exterior cabin right side is equipped with the screw that the drive work cabin gos forward, the exterior cabin right side is equipped with the lug, the exterior cabin left side is equipped with air vent one, interior cabin bottom is equipped with air vent two, the interior intracavity sets up gaseous booster compressor, be equipped with bleed pump and aspirator pump in the gaseous increasing machine, bleed pump and aspirator pump both ends are respectively through three-way valve connection valve A or valve B, valve A passes the interior cabin through the hose and connects air vent one, valve B passes through the hose connection air vent two for make things convenient for the sea pipe riser to change the rising and decline of dry-type work cabin, make the workman carry out work under dry environment.

Further, the outer cabin left side and the upper and lower both ends of open-close plate be equipped with the circular arc through-hole, the circular arc through-hole outside be equipped with the rubber circle, push-and-pull door both sides fixed mounting panel about, the mounting panel left end be equipped with the horizontally elongated slot, the mounting panel right-hand member is equipped with the vertically spout, the spout on reverse slip clamp plate I, clamp plate II for press from both sides tight former sea pipe riser.

Compared with the prior art, the invention has the beneficial effects that: (1) The movable mechanism and the rotary mechanism are matched to realize automatic replacement of the marine riser, the movable mechanism is internally provided with an outer pipe, a middle pipe and an inner pipe to move the original marine riser to the space on the right side of the outer cabin after being cut off, the rotary mechanism is combined to intermittently rotate to roll out a new marine riser, two ends of the new marine riser are provided with telescopic double-layer structures, the new marine riser is extended by the cylinder and clamped at the cut-off position of the original marine riser, and the marine riser can be rapidly replaced in batches; (2) According to the invention, the outer cabin and the inner cabin are arranged, the double-layer working cabin can better resist pressure in the sea, the outer cabin is separated into two closed spaces through the sliding door, seawater is prevented from entering, workers control the replacement of the riser of the marine pipe in the inner cabin through the controller, and the safety in the replacement process and the dry environment in the cabin are ensured; (3) According to the invention, the balance mechanism is arranged below the space on the right side of the outer cabin, the balance block moves along the vortex-shaped groove at the bottom of the weight block, the balance property of the dry-type working cabin replaced by the marine riser is ensured, the hidden surge in the sea is resisted, the inclination is prevented, meanwhile, the drainage quantity of the lower end on the right side of the outer cabin is controlled, the buoyancy is changed, and the rising and falling heights of the dry-type working cabin replaced by the marine riser are assisted.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view (rear view angle) of the fixing mechanism of the present invention.

Fig. 3 is a schematic structural view (front view angle) of the fixing mechanism of the present invention.

FIG. 4 is a schematic view of the clamp assembly of the present invention.

FIG. 5 is a first schematic view of the moving mechanism of the present invention.

FIG. 6 is a second schematic view of the moving mechanism of the present invention.

Fig. 7 is a schematic structural view of the rotating mechanism of the present invention.

Fig. 8 is a first schematic view of the balance mechanism of the present invention.

Fig. 9 is a second schematic view of the balance mechanism structure of the present invention.

FIG. 10 is a schematic view of the gas booster connecting line according to the present invention.

Reference numbers: 1-an outer chamber; 2-inner cabin; 3-a fixing mechanism; 4-a moving mechanism; 5-a rotating mechanism; 6-a balancing mechanism; 7-original marine riser; 8-new sea pipe riser; 301-a switching motor; 302-opening and closing the motor bracket; 303-opening and closing shaft; 304-a plywood; 305-a mounting plate; 306-a clamping assembly; 3061-clamping the motor; 3062-gear; 3063-lead screw; 3064-clamping plate I; 3065-clamping plate II; 3066-guide bar; 3067-guide bar support; 3068-lead screw support; 401-a cylinder; 402-a moving motor; 403-control gear; 404-a cylinder support; 405-a fixation plate; 406-lower gear; 407-upper gear; 408-a lower intermediate tube; 409-upper intermediate pipe; 410-upper outer tube; 411-lower outer tube; 412-upper jaw; 413-a lower jaw; 414-upper supporting plate; 415-a lower supporting plate; 416-cylinder I; 417-cylinder II; 418-electric saw I; 419-electric saw II; 420-upper inner tube; 421-lower inner tube; 422-left belt wheel; 423-a conveyor belt; 424-right pulley; 425-control shaft; 501-waterproof board; 502-rotating electrical machine; 503-incomplete gear; 504-toothed ring; 505-a transmission gear; 601-card seat; 602-a retractable plate; 603-telescopic cylinder; 604-a balancing motor; 605-a drive gear; 606-a driven gear; 607-control lever; 608-water pressing plate; 609-a weight; 610-a circular ring; 611-connecting rod; 612-a connector; 613-balance weight.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better explanation of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example (b): the dry-type working cabin for replacing the marine pipe vertical pipe comprises an outer cabin 1, an inner cabin 2, a fixing mechanism 3, a moving mechanism 4, a rotating mechanism 5, a balancing mechanism 6, an original marine pipe vertical pipe 7 and a new marine pipe vertical pipe 8, wherein an opening plate 304 is rotatably installed on the left side of the outer cabin 1, the outer cabin 1 is divided into a left space and a right space, the middle space is separated by a sliding door, a first vent hole is formed in the left side of the outer cabin 1, the inner cabin 2 is fixedly installed in the right space of the outer cabin 1, a door for workers to enter is arranged at the upper end of the inner cabin 2, an observation port is formed in the position, corresponding to the sliding door of the outer cabin 1, of the inner cabin 2 and used for observing and replacing the marine pipe vertical pipe, a controller is arranged above the observation port, the marine pipe vertical pipe is replaced by the worker through the controller, a second vent hole is formed in the bottom of the inner cabin 2, necessary articles for the workers to work are arranged in the inner cabin 2, a propeller for driving the right side of the outer cabin 1 is arranged on the outer cabin, a lifting lug is arranged on the right side of the outer cabin and connected with a dry-type working cabin through a gas pump, a gas discharging valve A and a gas sucking hose B, and a gas pump are arranged in the inner cabin, and connected with a three-way that a gas sucking hose B, and a gas pump, and a three-discharging valve B, and a gas pump are connected with a three-way, and a three-way valve.

Fixed mounting motor support 302 that opens and shuts in 1 left side upper end of nacelle, motor support 302 lower extreme fixed mounting motor 301 that opens and shuts, motor 301 that opens and shuts coaxially rotates axle 303 that opens and shuts, 1 left side rotation mounting axle 303 that opens and shuts in the nacelle, axle 303 that opens and shuts behind the open-close plate 304 fixed mounting, the left side of nacelle 1 and both ends are equipped with the circular arc through-hole from top to bottom with the open-close plate 304, the circular arc through-hole outside is equipped with the rubber circle, be used for adapting to the marine riser of different diameters, 1 left side space in nacelle is equipped with two upper and lower mounting panels 305, mounting panel 305 right side fixed mounting both sides about 1 push-and-pull door in the nacelle, the left end horizontal direction of mounting panel 305 is equipped with the elongated slot, be convenient for the entering of former marine riser 7, the right-hand member is equipped with the spout of vertical direction on the mounting panel 305, be equipped with clamping component 306 on the mounting panel 305, be used for pressing from both sides tight former marine riser 7.

The clamping assembly 306 comprises a clamping plate I3064 and a clamping plate II 3065 which are slidably mounted on a sliding groove of the mounting plate 305, the clamping plate I3064 and the clamping plate II 3065 are used for clamping an original marine pipe riser 7, a clamping motor 3061 is fixedly mounted on the mounting plate 305, an output shaft of the clamping motor 3061 is coaxially and rotatably mounted with a gear 3062, the gear 3062 is fixedly connected with a lead screw 3063, threads on two sides of the lead screw 3063 are opposite, a guide rod support 3067 and a lead screw support 3068 are fixedly mounted on the mounting plate 305, a guide rod 3066 is fixedly mounted on the guide rod support 3067, a lead screw 3063 is rotatably mounted on the lead screw support 3068, the clamping plate I3064 is slidably connected with the guide rod 3066, the clamping plate I3064 is threadedly connected with the lead screw 3063, the clamping plate II 3065 is slidably connected with the guide rod 3066, and the clamping plate II 3065 is threadedly connected with the lead screw 3063.

An air cylinder bracket 404 and a fixing plate 405 are fixedly installed on the lower end installing plate 305, an air cylinder 401 is fixedly installed on the air cylinder bracket 404, a moving motor 402 is fixedly installed on an expansion rod of the air cylinder 401, a control gear 403 is fixedly installed on a rotating shaft of the moving motor 402, the fixing plate 405 is divided into two layers, a lower gear 406 is rotatably installed on the lower layer of the fixing plate 405, an upper gear 407 is rotatably installed on the upper layer of the fixing plate 405, a first end of a lower middle pipe 408 is fixedly installed on the upper gear 407, a first end of a control shaft 425 is fixedly installed on the lower gear 406, when the air cylinder 401 extends, the control gear 403 is meshed with the lower gear 406, when the air cylinder 401 compresses, the control gear 403 is meshed with the upper gear 407, and the control shaft 425 is arranged on the inner side of the lower middle pipe 408.

The second end of a lower middle pipe 408 is connected with an upper middle pipe 409 in a sliding mode, an upper outer pipe 410 is fixedly installed on the outer side of the upper middle pipe 409, a lower outer pipe 411 is fixedly installed on the outer side of the second end of the lower middle pipe 408, the lower middle pipe 408 has three sides, the two adjacent sides are perpendicular, an upper clamping jaw 412 is arranged at the upper end of the upper outer pipe 410, a lower clamping jaw 413 is arranged at the lower end of the lower outer pipe 411, the upper clamping jaw 412 and the lower clamping jaw 413 are controlled to open and close through a controller and used for clamping an original marine pipe riser 7 or a new marine pipe riser 8, an upper supporting plate 414 is fixedly installed on the upper outer pipe 410, a lower supporting plate 415 is fixedly installed on the lower outer pipe 411, an air cylinder I416 and an air cylinder II 417 are fixedly connected, an upper supporting plate 414 is fixedly installed on an expansion rod of the air cylinder I416 and an expansion rod II 417 are used for controlling expansion and contraction of the upper outer pipe 410 and the lower outer pipe 411, an upper inner pipe 420 is rotatably installed inside the lower middle pipe 409, a lower inner pipe 408 is rotatably installed inside the lower middle pipe 408, an upper inner pipe 420 is provided with an electric saw 418, an upper end of the upper inner pipe 420 is provided with an electric saw 21, a lower pulley 418 is arranged at the lower pulley 422 and a position where the lower pulley 422 and a right pulley wheel 422 and a right pulley 424, a pulley wheel 422 is arranged for controlling the outer pulley wheel 418 and a distance between the upper pulley 424, and a right pulley 424, and a lower pulley 424, and a pulley wheel 418, the upper pulley wheel 418 is used for controlling the outer pulley 424, and a lower pulley wheel 418, the vertical pipe 418 is arranged.

The inside rotation installation ring gear 504 in outer cabin 1 right side space, be equipped with a plurality of arcs on the ring gear 504, new marine pipe riser 8 or the former marine pipe riser 7 that cuts off can be blocked to the arc, the arc has at least one dead slot, be convenient for deposit former marine pipe riser 7 that cuts off, the lower fixed surface installation waterproof board 501 of interior cabin 2, separate into two spaces about with outer cabin 1 right side space through waterproof board 501, fixed mounting rotating electrical machines 502 on waterproof board 501, incomplete gear 503 of fixed mounting in the rotating shaft of rotating electrical machines 502, incomplete gear 503 has tooth part and ring gear 504 to mesh mutually, rotate two drive gear 505 of installation on the waterproof board 501, drive gear 505 and ring gear 504 mesh mutually, new marine pipe riser 8 upper and lower both ends are double-deck extending structure, the junction is the sealing strip, guarantee the leakproofness.

Four clamping seats 601 are fixedly arranged inside the inner cabin 2, rest of workers is facilitated, a telescopic plate 602 is fixedly arranged on each clamping seat 601, the upper end of a control rod 607 is rotatably arranged at the center of each telescopic plate 602, a telescopic cylinder 603 is fixedly arranged on each inner cabin 2, a telescopic rod of each telescopic cylinder 603 is fixedly arranged on each telescopic plate 602, a balance motor 604 is fixedly arranged on each telescopic plate 602, a driving gear 605 is fixedly arranged on a rotating shaft of each balance motor 604, the driving gear 605 is meshed with a driven gear 606, a driven gear 606 is fixedly arranged on each control rod 607, a plurality of water through holes are formed in the lower end of the right space of the outer cabin 1, two sections of threads are arranged on each control rod 607, the directions of the two sections of threads are opposite, a light rod part is arranged between the two ends of the threads, a water pressing plate 608 is arranged on the outer side of each control rod 607, the water pressing plate 608 is slidably arranged at the lower end of the right space of the outer cabin 1 through splines, when the upper section of the control rod 607 is connected with the water pressing plate 608, the water pressing plate 608 does not move upwards, when the lower section of the control rod 607 is connected with the water pressing plate 608, the middle part of the light pressing plate 608 moves downwards, and when the middle of the water pressing plate 608 is connected with the control rod 607.

The lower surface of the right side space of the outer cabin 1 is fixedly provided with a pressure weight 609, the lower end of a control rod 607 is provided with the pressure weight 609, the lower end of the pressure weight 609 is provided with a vortex groove, the lower end of the pressure weight 609 is rotatably provided with a ring 610, the ring 610 is fixedly provided with a first end of a connecting rod 611, the connecting rod 611 is fixedly provided with a second connecting head 612, the pressure weight 609 is rotatably provided with a connecting head 612, the connecting rod 611 is slidably provided with a balance weight 613, the upper end of the balance weight 613 is arranged in the vortex groove of the pressure weight 609, the lower end of the control rod 607 is provided with a clamping key, the ring 610 is provided with a clamping groove, the length of the clamping key is the same as that of the ring 610, the length of the clamping key is smaller than that of a polished rod in the middle of the thread of the control rod 607, when the clamping key is connected with the ring 610, the pressure plate 608 is in contact with the polished rod, the weight of the pressure weight 609 is controlled by changing the position of the balance weight 613, and the vibration in the sea is avoided.

The invention discloses a working principle of a dry-type working cabin for replacing a marine riser, which comprises the following steps: when the marine riser needs to be replaced, a worker enters the inner cabin 2, the controller controls the dry type working cabin of the marine riser, the lifting lug on the outer cabin 1 is connected through a steel cable, the outer cabin 1 is placed in the sea, the joint of parts is provided with a sealing strip to prevent water from entering the outer cabin 1, the related motor is a waterproof motor, the control rod 607 is controlled through the balance motor 604, the upper end thread of the control rod 607 is connected with the water pressing plate 608, the balance motor 604 drives the control rod 607 to rotate through gear transmission to drive the water pressing plate 608 to move upwards, meanwhile, the pressure between the water pressing plate 608 and the waterproof plate 501 is controlled through the valve B and the suction pump, seawater enters from the water through hole of the outer cabin 1 to increase the weight of the outer cabin 1, so that the outer cabin 1 can sink to a proper position in the sea conveniently, when the marine surging occurs, the outer cabin 1 starts to shake, the lower end of the control rod 607 is connected with the circular ring 610 to drive the balance block 613 to change the position, changing the load of the outer cabin 1, further reducing the shaking, controlling the opening plate 304 to rotate through the opening and closing motor 301, clamping the original marine pipe riser 7 between the left space of the outer cabin 1 and the opening plate 304, rotating through the clamping motor 3061, driving the gear 3062 to rotate, driving the screw 3063 to rotate, driving the clamping plate I3064 and the clamping plate II 3065 to clamp the original marine pipe riser 7, opening the water pump in the left space of the outer cabin 1, pumping out the seawater, controlling the pressure in the left space of the outer cabin 1 through the control valve A and the air release pump, opening the sliding door in the middle of the outer cabin 1, at the moment, the upper arc-shaped groove of the gear ring 504 is opposite to the original marine pipe riser 7, the upper clamping jaw 412 and the lower clamping jaw 413 clamp the original marine pipe riser 7, extending the cylinder 401, the moving motor 402 drives the control gear 403 to rotate, driving the lower gear 406 to rotate, driving the control shaft 425 to rotate, and driving the lower inner pipe 421 to rotate through belt transmission, the upper inner pipe 420 is driven to rotate, the electric saws I418 and II 419 are driven to rotate, the electric saws I418 and II 419 cut off the original marine riser 7, the air cylinder 401 is compressed, the moving motor 402 drives the upper gear 407 to rotate through the control gear 403, drives the lower middle pipe 408 to rotate, drives the upper middle pipe 409 to rotate, drives the upper outer pipe 410 and the lower outer pipe 411 to rotate, moves the cut original marine riser 7 into the hollow arc-shaped groove of the toothed ring 504 through the upper clamping jaw 412 and the lower clamping jaw 413, the rotating motor 502 is started to drive the incomplete gear 503 to rotate, drives the toothed ring 504 to rotate, enables the new marine riser 8 to be opposite to the original marine riser 7, and the upper clamping jaw 412 and the lower clamping jaw 413 clamp two ends of the new marine riser 8, the new marine riser 8 is moved to the original marine riser 7 through the reverse rotation of the mobile motor 402, the cylinder I416 and the cylinder II 417 are extended to drive the two ends of the new marine riser 8 to extend, because the two ends of the new marine riser 8 are of a double-layer telescopic structure, the new marine riser 8 is clamped into the inner end and the outer end of the original marine riser 7, the single replacement is completed, after all the marine risers are replaced, the control rod 607 is controlled through the telescopic cylinder 603, the lower end thread of the control rod 607 is connected with the water pressing plate 608, the balance motor 604 drives the water pressing plate 608 to move downwards, meanwhile, the pressure between the water pressing plate 608 and the waterproof plate 501 is controlled through the valve B and the air release pump, the seawater in the outer cabin 1 is reduced, and the buoyancy for the outer cabin 1 to ascend is increased.

The present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make various modifications without creative efforts from the above-described conception and fall within the scope of the present invention.

Claims

1. The utility model provides a dry-type work cabin is changed to sea pipe riser, includes former sea pipe riser (7), new sea pipe riser (8), its characterized in that: the marine riser comprises an outer cabin (1), an inner cabin (2), a fixing mechanism (3), a moving mechanism (4), a rotating mechanism (5) and a balancing mechanism (6), wherein two ends of a new marine riser (8) are of telescopic double-layer structures; an opening plate (304) is rotatably arranged on the left side of the outer cabin (1), the outer cabin (1) is divided into a left space and a right space, the middle space is separated by a sliding door, an inner cabin (2) is fixedly arranged in the right space of the outer cabin (1), and a water pump is arranged at the lower end of the left space of the outer cabin (1) and used for pumping out seawater; the split plate (304) can clamp an original marine pipe riser (7) in the space on the left side of the outer cabin (1), mounting plates (305) are arranged at the upper end and the lower end of the space on the left side of the outer cabin (1), a clamping assembly (306) is arranged on each mounting plate (305) and used for clamping the original marine pipe riser (7), a toothed ring (504) is rotatably mounted in the space on the right side of the outer cabin (1), the toothed ring (504) is provided with a plurality of arc-shaped grooves, at least one hollow groove is formed in each arc-shaped groove, the arc-shaped grooves can clamp the cut original marine pipe riser (7) or a new marine pipe riser (8), and a balance mechanism (6) used for assisting the lifting and balancing of a dry-type marine pipe riser replacing working cabin is arranged at the lower end on the right side of the outer cabin (1);

a fixed plate (405) and a cylinder bracket (404) are fixedly arranged on the mounting plate (305), the fixed plate (405) is divided into two layers, a lower gear (406) is rotatably arranged on the lower layer of the fixed plate (405), an upper gear (407) is rotatably arranged on the upper layer of the fixed plate (405), a first end of a lower middle pipe (408) is fixedly arranged on the upper gear (407), the lower middle pipe (408) is provided with three edges, two adjacent edges are vertical, a first end of a control shaft (425) is fixedly arranged on the lower gear (406), a second end of the control shaft (425) is connected with a lower inner pipe (421) through a transmission assembly, the lower inner pipe (421) is rotatably arranged in the lower middle pipe (408), an upper middle pipe (409) is slidably arranged at the second end of a lower middle pipe (408), an upper inner pipe (420) is rotatably arranged in the upper middle pipe (409), the upper inner pipe (420) is slidably connected with a lower inner pipe (421), an electric saw I (418) is fixedly arranged at the upper end of the upper inner pipe (420), an electric saw II (419) is fixedly arranged on the lower inner pipe (421), the electric saw I (418) and the electric saw II (419) are used for cutting off an original marine pipe riser (7), an upper outer pipe (410) is fixedly arranged on the outer side of the upper middle pipe (409), a lower outer pipe (411) is fixedly arranged on the outer side of the lower middle pipe (408), an upper clamping jaw (412) is arranged on the upper outer pipe (410), and a lower clamping jaw (413) is arranged on the lower outer pipe (411), the upper clamping jaw (412) and the lower clamping jaw (413) are controlled to open and close through a controller, and the upper outer pipe (410) is connected with the lower outer pipe (411) in a sliding mode.

2. The dry-working vessel for sea riser replacement according to claim 1, wherein: the air cylinder bracket (404) is fixedly provided with an air cylinder (401), an expansion rod of the air cylinder (401) is fixedly provided with a moving motor (402), an output shaft of the moving motor (402) coaxially rotates a control gear (403), when the air cylinder (401) expands, the control gear (403) is meshed with a lower gear (406), and when the air cylinder (401) compresses, the control gear (403) is meshed with an upper gear (407).

3. The dry-working vessel for sea riser replacement according to claim 2, wherein: the novel water-proof cabin is characterized in that the toothed ring (504) is meshed with the transmission gear (505), the waterproof plate (501) is fixedly installed in the right space of the outer cabin (1), the waterproof plate (501) is fixedly installed on the lower surface of the inner cabin (2), the transmission gear (505) is rotatably installed on the waterproof plate (501), the rotating motor (502) is fixedly installed on the waterproof plate (501), the incomplete gear (503) is fixedly installed on the rotating shaft of the rotating motor (502), and the toothed part of the incomplete gear (503) is meshed with the toothed ring (504).

4. The dry-working vessel for sea riser replacement according to claim 3, wherein: four cassette (601) of inside fixed mounting of interior cabin (2), fixed mounting expansion plate (602) on cassette (601), expansion plate (602) central point puts and rotates installation control lever (607), fixed surface installs ballast weight (609) under the right side space of outer cabin (1), and the control lever (607) outside is equipped with pressurized-water plate (608), ballast weight (609), and outer cabin (1) right side lower extreme is equipped with a plurality of limbers.

5. The dry-working vessel for sea riser replacement according to claim 4, wherein: the utility model discloses a ballast block, including ballast block (609), connecting rod (611) and connecting rod (611), ballast block (609) bottom be equipped with the vortex groove, ballast block (609) lower extreme rotation installation ring (610), the first end of fixed mounting connecting rod (611) is gone up in ring (610), connecting rod (611) second end fixed mounting connector (612), rotation installation connector (612) in ballast block (609), slidable mounting balancing piece (613) on connecting rod (611), establish balancing piece (613) upper end the vortex inslot, control lever (607) lower extreme is equipped with the card key, ring (610) are equipped with the draw-in groove, card key length and ring (610) length the same.

6. The dry-working vessel for sea riser replacement according to claim 5, wherein: the control rod (607) is provided with two sections of threads in opposite directions, a polished rod is arranged between the two sections of threads, the lower end of the inner part of the right side of the inner cabin (2) is provided with a water pressing plate (608) in a sliding mode, when the water pressing plate (608) is connected with the upper section of threads, the water pressing plate (608) moves upwards, when the water pressing plate (608) is connected with the lower section of threads, the water pressing plate (608) moves downwards, the length of the clamping key is smaller than that of the polished rod, and when the clamping key is connected with the circular ring (610), the water pressing plate (608) is in contact with the polished rod.

7. A dry-working sea-pipe riser replacement module according to any one of claims 1-6, wherein: inner chamber (2) upper end be equipped with the door, inner chamber (2) correspond push-and-pull door department be equipped with the viewing aperture, viewing aperture top be equipped with the controller, the workman changes the sea pipe riser through the controller, inner chamber (2) inside is equipped with and is used for the required indispensable article of workman, outer chamber (1) right side is equipped with the screw that the drive work cabin gos forward, outer chamber (1) right side is equipped with the lug, outer chamber (1) left side is equipped with air vent one, inner chamber (2) bottom is equipped with air vent two, sets up gaseous booster compressor in inner chamber (2), is equipped with pump and aspirator pump in the gaseous increase machine, and valve A or valve B are connected through three-way valve connection valve A or valve B respectively at air vent pump and aspirator pump both ends, valve A passes inner chamber (2) through the hose and connects air vent one, valve B passes through the hose connection air vent two.

8. The dry-working vessel for marine riser replacement according to claim 7, wherein: outer cabin (1) left side and open-close board (304) about both ends be equipped with the circular arc through-hole, the circular arc through-hole outside be equipped with the rubber circle, push-and-pull door about both sides fixed mounting panel (305), mounting panel (305) left end be equipped with the horizontally elongated slot, mounting panel (305) right-hand member is equipped with the vertically spout, the spout on reverse slip clamp plate I (3064), clamp plate II (3065) for press from both sides tight former sea pipe riser (7).