CN114811187B - A dry working cabin for subsea riser replacement - Google Patents

Abstract

The invention discloses a dry working cabin for replacing a subsea pipe riser, which relates to the technical field of subsea pipe riser replacement, and includes an original subsea pipe riser, a new subsea pipe riser, an outer cabin, an inner cabin, a fixed mechanism, a moving mechanism, a rotary Mechanism, balance mechanism, the outer cabin is divided into two spaces, left and right, the middle is separated by a sliding door, the space on the right side of the outer cabin is fixedly installed with the inner cabin, and the upper and lower ends of the left space of the outer cabin are provided with mounting plates, which are provided with There is a clamping component for clamping the original sea pipe riser, the mounting plate is provided with a moving mechanism for moving the cut original sea pipe riser, the space on the right side of the outer cabin is rotated to install a toothed ring, and the toothed ring has multiple arcs The curved groove has at least one empty groove. The curved groove can clamp the original subsea pipe riser or new subsea pipe riser that has been cut off. The lower end of the right side of the outer cabin is provided with a dry working cabin lift for assisting the replacement of the subsea pipe riser. and balanced balancing mechanism, the invention has the characteristics of high integration degree, rich functions and simple operation.

Description

A sea pipe standpipe replacement dry working cabin

technical field

The invention relates to the technical field of replacement of sea pipe standpipes, in particular to a dry working cabin for replacement of sea pipe standpipes.

Background technique

The pipeline connecting the seabed and the floating body on the sea is also called the sea pipe riser. Its main function is to transport oil or natural gas. The replacement part is mostly replaced by conventional methods. For the underwater part of the sea pipe riser, the sea pipe riser is replaced by manual use of diving equipment or air diving technology, which is often difficult to replace due to the heavy weight of the sea pipe riser. Batch replacement cannot be realized, which makes it difficult to replace the sea pipe riser underwater. The Chinese patent with the publication number CN206206777U discloses a crude oil riser maintenance and replacement device on an offshore platform, including a device body and a crude oil riser. The crude oil riser is fixed on the There are slide rails, and the inner side of the device body is movably connected with the slide rails through pulleys. Rubber rings are fixed between the top and bottom of the device body and the crude oil standpipe, and there are fixed holes for personnel to move freely inside the device body. Maintenance cabin, storage cabin and control cabin, the top and bottom of the device body are fixed with propellers, the device installs slide rails on the riser of the sea tube, and uses pulleys to flexibly connect with the slide rails, and the original single diving maintenance The equipment becomes a diving maintenance equipment integrated with the crude oil riser, but the cost of installing slide rails outside the riser of the sea pipe is relatively high, it is not easy to implement, and manual replacement is required, and the degree of automation is low. Therefore, the present invention provides a The riser replaces the dry working chamber.

Contents of the invention

The technical problem to be solved by the present invention is to provide a sea pipe riser replacement dry working cabin.

Aiming at the above-mentioned technical problems, the technical solution provided by the present invention is: a kind of sea pipe riser replacement dry working cabin, including the original sea pipe riser, new sea pipe riser, outer cabin, inner cabin, fixing mechanism, moving mechanism, rotating Mechanism and balance mechanism, the two ends of the riser of the new sea pipe are retractable double-layer structures; Open, the space on the right side of the outer cabin is fixedly installed with the inner cabin, and the lower end of the space on the left side of the outer cabin is provided with a water pump for pumping out seawater; There are mounting plates at the upper and lower ends of the space on the left side. Clamping components are provided on the mounting plate for clamping the original sea pipe riser. The space on the right side of the outer cabin is rotated to install the gear ring. The gear ring has multiple arc-shaped grooves. There is at least one empty slot in the shaped groove. The original sea pipe riser or new sea pipe riser can be clamped and cut off by the arc groove. Balanced balancing mechanism.

The fixed plate and the cylinder bracket are fixedly installed on the mounting plate. The fixed plate is divided into two layers. The lower layer of the fixed plate rotates to install the lower gear, and the upper layer of the fixed plate rotates to install the upper gear. The tube has three sides, two adjacent sides are vertical, the lower gear is fixedly installed on the first end of the control shaft, the second end of the control shaft is connected with the lower inner tube through the transmission assembly, the lower inner tube is installed by rotating inside the lower middle tube, and the lower middle tube is installed The second end of the pipe is slidably installed on the upper middle pipe, the upper middle pipe is rotated inside to install the upper inner pipe, the upper inner pipe and the lower inner pipe are slidably connected, the upper end of the upper inner pipe is fixedly installed with electric saw Ⅰ, and the upper end of the lower inner pipe is fixedly installed with electric saw II. Chainsaw Ⅰ and chainsaw Ⅱ are used to cut off the original sea pipe riser. The upper outer pipe is fixedly installed on the outside of the upper middle pipe, and the lower outer pipe is fixedly installed on the outer side of the lower middle pipe. The upper part is provided with the lower jaw, the upper jaw and the lower jaw are opened and closed through the control of the controller, and the upper outer tube and the lower outer tube are slidably connected.

Further, the cylinder is fixedly installed on the cylinder bracket, and the mobile motor is fixedly installed on the telescopic rod of the cylinder, and the output shaft of the mobile motor rotates the control gear coaxially. When the cylinder is extended, the control gear and the lower gear are meshed. When the cylinder is compressed, The control gear and the upper gear are meshed to provide power for the movement of the riser of the sea pipe after cutting.

Further, the gear ring is meshed with the transmission gear, the waterproof plate is fixedly installed in the space on the right side of the outer compartment, the waterproof plate is fixedly installed on the lower surface of the inner compartment, the transmission gear is installed on the waterproof plate for rotation, and the rotating motor is fixedly installed on the waterproof plate. The incomplete gear is fixedly installed on the rotating shaft of the rotary motor, and the toothed part of the incomplete gear meshes with the gear ring for intermittent rotation of the gear ring.

Further, four card holders are fixedly installed inside the inner cabin, a telescopic plate is fixedly installed on the card holder, a control rod is installed at the center of the telescopic plate, and a ballast is fixedly installed on the lower surface of the space on the right side of the outer cabin, The outer side of the control rod is provided with a pressure water plate and a weight block, and the lower end of the right side of the outer cabin is provided with a plurality of water holes, and the lifting is controlled by changing the size of the buoyancy.

Further, the bottom of the weight block is provided with a vortex groove, the lower end of the weight block is rotated and installed with a ring, the first end of the connecting rod is fixedly installed on the ring, and the second end of the connecting rod is fixedly installed with a connector. The connecting head is rotated and installed, and the balance weight is slid on the connecting rod. The upper end of the balance weight is set in the vortex groove, the lower end of the control rod is provided with a key, and the ring is provided with a slot. The length of the key and the ring The length is the same to prevent undercurrents in the sea and maintain balance.

Further, the control rod is provided with two threads in opposite directions, a polished rod is arranged between the two threads, and a water pressure plate is slidably installed at the lower end on the right side of the inner cabin. When the water pressure plate is connected to the upper thread, the water pressure plate is The water plate moves upwards. When the water pressure plate is connected with the lower thread, the water pressure plate moves downward. The length of the key is less than the length of the polished rod. When the key is connected with the ring, the water pressure The plate is in contact with the polished rod for assisting the balance and lifting of the working cabin.

Further, the upper end of the inner cabin is provided with a door, and the inner cabin is provided with an observation port corresponding to the sliding door, and a controller is provided above the observation port, and the worker replaces the riser of the sea pipe through the controller, and the inner cabin The interior is equipped with necessary items for workers. The right side of the outer cabin is equipped with a propeller that drives the working cabin forward. Air hole 2, a gas booster is installed in the inner cabin, and the gas booster is equipped with an air discharge pump and an air suction pump. The two ends of the air discharge pump and the air suction pump are respectively connected to valve A or valve B through a three-way valve. Pass through the inner cabin to connect the vent hole 1, and the valve B is connected to the vent hole 2 through a hose, which is used to facilitate the rise and fall of the sea pipe standpipe to replace the dry working cabin, so that the workers can carry out the work in a dry environment. Work.

Further, the left side of the outer cabin and the upper and lower ends of the opening and closing plate are provided with circular arc through holes, the outer side of the circular arc through hole is provided with rubber rings, and the upper and lower sides of the sliding door are fixedly installed with mounting plates. The left end of the mounting plate is provided with a horizontal long groove, and the right end of the mounting plate is provided with a vertical chute, and the clamping plate Ⅰ and clamping plate Ⅱ are reversely slid on the chute to clamp the original sea pipe riser. .

Compared with the prior art, the present invention has the beneficial effects as follows: (1) The moving mechanism and the rotating mechanism provided in the present invention cooperate to realize the automatic replacement of the sea pipe standpipe, and the outer pipe, the middle pipe and the inner pipe are arranged in the moving mechanism to replace the original After the sea pipe riser is cut off, it moves to the space on the right side of the outer cabin, and the new sea pipe riser is rotated out in combination with the intermittent rotation of the rotating mechanism. Elongated, stuck at the cut-off place of the original sea pipe riser, realizing rapid replacement of the sea pipe riser in batches; (2) The present invention has an outer cabin and an inner cabin, and the double-layer working cabin can better resist the pressure in the sea, and the outer cabin can be pushed and pulled The door is separated into two closed spaces to avoid the entry of seawater. The workers in the inner cabin control the replacement of the sea pipe standpipe through the controller to ensure the safety during the replacement process and the dry environment in the cabin; (3) the present invention is located in the space on the right side of the outer cabin A balance mechanism is set at the bottom, and the balance block is used to move along the vortex groove at the bottom of the weight block to ensure the balance of the sea pipe standpipe replacing the dry working cabin, resist the undercurrent in the sea, prevent tilting, and control the displacement at the lower end of the outer cabin at the same time to change Buoyancy, auxiliary sea pipe riser replaces the height of ascent and descent of the dry working compartment.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the structure of the fixing mechanism of the present invention (back view angle).

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

Fig. 4 is a schematic structural diagram of the clamping assembly of the present invention.

Fig. 5 is the first schematic diagram of the structure of the moving mechanism of the present invention.

Fig. 6 is a second schematic diagram of the structure of the moving mechanism of the present invention.

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

Fig. 8 is the first schematic diagram of the structure of the balance mechanism of the present invention.

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

Fig. 10 is a schematic diagram of the connecting pipeline of the gas booster of the present invention.

Reference numerals: 1-outer cabin; 2-inner cabin; 3-fixed mechanism; 4-moving mechanism; 5-rotating mechanism; 6-balance mechanism; 7-original sea pipe riser; 8-new sea pipe riser; -opening and closing motor; 302-opening and closing motor bracket; 303-opening and closing shaft; 304-opening and closing plate; 305-installation plate; 306-clamping assembly; - clamping plate Ⅰ; 3065- clamping plate Ⅱ; 3066- guide rod; 3067- guide rod bracket; 3068- lead screw bracket; 401- cylinder; 402- mobile motor; 403- control gear; - fixed plate; 406 - lower gear; 407 - upper gear; 408 - lower middle tube; 409 - upper middle tube; 410 - upper outer tube; 411 - lower outer tube; 412 - upper jaw; 413 - lower jaw; 414-upper support plate; 415-lower support plate; 416-cylinder Ⅰ; 417-cylinder Ⅱ; 418-chainsaw Ⅰ; 419-chainsaw Ⅱ; 420-upper inner tube; Wheel; 423-conveyor belt; 424-right pulley; 425-control shaft; 501-waterproof plate; 502-rotary motor; 503-incomplete gear; 504-gear ring; Telescopic plate; 603- telescopic cylinder; 604- balance motor; 605- driving gear; 606- driven gear; 607- control rod; ; 612-connector; 613-balance weight.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

Wherein, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical drawings, and should not be construed as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings will be omitted, Enlargement or reduction does not represent the size of the actual product; for those skilled in the art, it is understandable that certain known structures and their descriptions in the drawings may be omitted.

Embodiment: A kind of sea pipe riser replacement dry-type working cabin as shown in Fig. 1-Fig. The sea pipe riser 7, the new sea pipe riser 8, the left side of the outer cabin 1 is rotated and the opening and closing plate 304 is installed, the outer cabin 1 is divided into two spaces, left and right, separated by a sliding door in the middle, and the left side of the outer cabin 1 is provided with a passageway. Air hole 1, the inner cabin 2 is fixedly installed in the space on the right side of the outer cabin 1, the upper end of the inner cabin 2 is provided with a door for workers to enter, and the inner cabin 2 is provided with an observation port corresponding to the sliding door of the outer cabin 1, which is used to observe and replace the sea tube stand There is a controller above the observation port, through which workers can replace the riser of the sea pipe. There is a vent hole 2 at the bottom of the inner cabin 2. Inside the inner cabin 2, there are necessary items for workers to work. The outer cabin The right side of the outer cabin 1 is provided with a propeller to drive the working cabin forward, the right side of the outer cabin 1 is provided with lifting lugs for lifting the dry working cabin of the sea pipe riser, and the lower end of the space on the left side of the outer cabin 1 is provided with a water pump for The seawater in the space on the left side of the outer cabin 1 is pumped out, and a gas booster is installed in the inner cabin 2. The gas booster is equipped with a deflation pump and a suction pump, and the two ends of the deflation pump and the suction pump are respectively connected to valve A or Valve B and valve A pass through the inner cabin 2 to connect to the vent hole 1 through a flexible pipe, and valve B connects to the vent hole 2 through a flexible pipe.

The opening and closing motor bracket 302 is fixedly installed on the upper left side of the outer cabin 1, and the opening and closing motor 301 is fixedly installed on the lower end of the opening and closing motor bracket 302. The shaft 303 and the rear side of the opening and closing plate 304 are fixedly installed with the opening and closing shaft 303. The left side of the outer cabin 1 and the upper and lower ends of the opening and closing plate 304 are provided with arc through holes, and the outside of the arc through holes is provided with rubber rings for adapting to different diameters. Two mounting plates 305 up and down are arranged in the space on the left side of the outer cabin 1, the upper and lower sides of the sliding door of the outer cabin 1 are fixedly installed on the right side of the mounting plate 305, and the left end of the mounting plate 305 is horizontally provided with a long groove for easy When the original sea pipe riser 7 enters, the upper right end of the mounting plate 305 is provided with a vertical chute, and the mounting plate 305 is provided with a clamping assembly 306 for clamping the original sea pipe riser 7 .

The clamping assembly 306 includes the clamping plate I3064 and the clamping plate II3065 which are slidably installed on the chute of the mounting plate 305. The clamping plate I3064 and the clamping plate II3065 are used to clamp the original sea pipe riser 7. Clamping motor 3061 is fixedly installed, and the output shaft of clamping motor 3061 rotates coaxially. Gear 3062 is installed, and gear 3062 is fixedly connected with leading screw 3063. The threads on both sides of leading screw 3063 are opposite, and guide rod bracket 3067 and leading screw are fixedly installed on the mounting plate 305. Bracket 3068, guide rod 3066 is fixedly installed on guide rod bracket 3067, lead screw 3063 is rotated on screw bracket 3068, clamping plate I 3064 is slidingly connected with guide rod 3066, clamping plate I 3064 is threadedly connected with lead screw 3063, clamping plate II 3065 is in sliding connection with the guide rod 3066, and the clamping plate II 3065 is in screw connection with the lead screw 3063.

Cylinder support 404 and fixed plate 405 are fixedly installed on the lower end mounting plate 305, cylinder 401 is fixedly installed on the cylinder support 404, and the telescoping rod of cylinder 401 is fixedly installed with mobile motor 402, and control gear 403 is fixedly installed on the rotating shaft of mobile motor 402, and fixed plate 405 is divided into Two layers, the lower layer of the fixed plate 405 is rotatably installed with the lower gear 406, the upper layer of the fixed plate 405 is rotatably installed with the upper gear 407, the upper gear 407 is fixedly installed with the first end of the lower middle pipe 408, and the lower gear 406 is fixedly installed with the first end of the control shaft 425, when the cylinder When 401 is stretched, the control gear 403 is engaged with the lower gear 406, and when the cylinder 401 is compressed, the control gear 403 is engaged with the upper gear 407, and the control shaft 425 is arranged on the inner side of the lower intermediate pipe 408.

The second end of the lower middle pipe 408 is slidingly connected to the upper middle pipe 409. The upper outer pipe 410 is fixedly installed outside the upper middle pipe 409, and the lower outer pipe 411 is fixedly installed outside the second end of the lower middle pipe 408. The lower middle pipe 408 has three sides. The two adjacent sides are vertical, the upper end of the upper outer tube 410 is provided with an upper jaw 412, and the lower end of the lower outer tube 411 is provided with a lower jaw 413, and the upper jaw 412 and the lower jaw 413 are opened and closed through the control of the controller. Clamp the original sea pipe standpipe 7 or the new sea pipe standpipe 8, fix the upper support plate 414 on the upper outer pipe 410, fix the lower support plate 415 on the lower outer pipe 411, fixedly connect the cylinder I 416, cylinder II 417, and expand the cylinder I 416 The upper support plate 414 is fixedly installed on the rod, and the lower support plate 415 is fixedly installed on the telescopic rod of the cylinder II417. The cylinder I416 and II417 are used to control the expansion and contraction of the upper outer tube 410 and the lower outer tube 411. , the lower middle tube 408 is rotated to install the lower inner tube 421, the upper end of the upper inner tube 420 is provided with a chainsaw I418, the lower end of the lower inner tube 421 is provided with a chainsaw II419, and the chainsaw I418 and the chainsaw II419 are used to turn the original sea pipe standpipe 7 Cut off, the distance between the cylinder II 417 and the chainsaw I 418 is less than the height of the sliding door of the outer cabin 1, to ensure that the original sea pipe standpipe 7 after cutting can enter the right space of the outer cabin 1, and the lower end of the lower inner pipe 421 is fixedly installed with the left belt The wheel 422 and the second end of the control shaft 425 are fixedly installed with the right pulley 424 , and the conveyor belt 423 is located on the outside of the left pulley 422 and the right pulley 424 .

The space on the right side of the outer cabin 1 rotates and installs the toothed ring 504, and the toothed ring 504 is provided with a plurality of arc grooves, which can hold the new sea pipe riser 8 or the cut original sea pipe riser 7, and the arc grooves are at least There is an empty slot, which is convenient for storing the cut-off original sea pipe standpipe 7. The lower surface of the inner cabin 2 is fixedly installed with a waterproof board 501, and the space on the right side of the outer cabin 1 is separated into two spaces up and down by the waterproof board 501. The rotating motor 502 is fixedly installed, and the incomplete gear 503 is fixedly installed on the rotating shaft of the rotating motor 502. The toothed part of the incomplete gear 503 meshes with the gear ring 504. Two transmission gears 505, the transmission gear 505 and the gear ring are installed on the waterproof plate 501 for rotation. 504 are meshed, the upper and lower ends of the new sea pipe riser 8 are double-layer retractable structures, and the joints are sealed to ensure airtightness.

Four decks 601 are fixedly installed in the interior of the inner cabin 2, which is convenient for the staff to have a rest. The telescopic plate 602 is fixedly installed on the deck 601, and the center position of the telescopic plate 602 is rotated to install the upper end of the control rod 607, and the telescopic cylinder 603 is fixedly installed on the inner cabin 2. Telescopic cylinder 603 telescopic rod fixedly installs telescopic plate 602, fixedly installs balance motor 604 on the telescopic plate 602, fixedly installs driving gear 605 on the balance motor 604 rotating shaft, driving gear 605 and driven gear 606 are meshed, and is fixedly installed on the control rod 607 from Moving gear 606, the lower end of the space on the right side of the outer cabin 1 is provided with a plurality of water holes, and the control rod 607 is provided with two sections of thread, and the direction of the two sections of threads is opposite. Press water plate 608, and the lower end of the space on the right side of outer cabin 1 slides and installs press water plate 608 through splines. When the thread on the upper section of the control rod 607 is connected to the water press plate 608, the water press plate 608 moves upward. When the thread on the lower section of the control rod 607 and When the water pressure plate 608 is connected, the water pressure plate 608 moves downward, and when the polished rod part in the middle of the control rod 607 is connected with the water pressure plate 608, the water pressure plate 608 does not move.

A ballast 609 is fixedly installed on the lower surface of the space on the right side of the outer cabin 1, and the lower end of the control rod 607 is provided with a ballast 609. 610 is fixedly installed with the first end of the connecting rod 611, the second fixedly installed connecting head 612 of the connecting rod 611, the connecting head 612 is rotated and installed in the weight block 609, the balancing weight 613 is slidably installed on the connecting rod 611, and the upper end of the balancing weight 613 is arranged on the weighted weight In the vortex groove of the block 609, the lower end of the control rod 607 is provided with a card key, and the ring 610 is provided with a card groove. The length of the card key is the same as that of the ring 610. When the rings 610 are connected, the pressure water plate 608 is in contact with the polished rod, and the weight of the pressure weight 609 is controlled by changing the position of the balance weight 613 to avoid shaking in the sea.

The working principle of a sea pipe riser replacement dry-type working cabin disclosed by the present invention is as follows: when the sea pipe riser needs to be replaced, the worker enters the inner cabin 2, controls the sea pipe riser dry-type working cabin through the controller, and passes The steel cable is connected to the upper lug of the outer cabin 1, and the outer cabin 1 is put into the sea. A sealing strip is provided at the joint of the parts to prevent water from entering the outer cabin 1. The motor involved is a waterproof motor, and the control rod 607 is controlled by the balance motor 604. The thread on the upper end of the control rod 607 is connected with the pressure water plate 608, and the balance motor 604 drives the control rod 607 to rotate through the gear transmission, driving the water pressure plate 608 to move up, and at the same time, through the valve B and the suction pump, the water pressure plate 608 and the waterproof plate are controlled The pressure between 50 and 1, the sea water enters from the water hole of the outer cabin 1, which increases the weight of the outer cabin 1, so that the outer cabin 1 can sink to a suitable position in the sea. The lower end of 607 is connected with the ring 610, which drives the balance weight 613 to change the position, changes the load of the outer cabin 1, and then reduces the shaking. The opening and closing plate 304 is controlled by the opening and closing motor 301 to rotate, and the original sea pipe standpipe 7 is stuck in the outer cabin 1. Between the space on the left side and the opening and closing plate 304, the rotation of the clamping motor 3061 drives the rotation of the gear 3062 and the rotation of the lead screw 3063, and drives the clamping plate I 3064 and the clamping plate II 3065 to clamp the original sea pipe standpipe 7 and open the outer shell. The water pump in the space on the left side of the cabin 1 pumps out the sea water, and at the same time controls the pressure in the space on the left side of the outer cabin 1 through the control valve A and the deflation pump, and opens the sliding door in the middle of the outer cabin 1. At this time, the arc groove in the space above the gear ring 504 is For the original sea pipe riser 7, the upper jaw 412 and the lower jaw 413 clamp the original sea pipe riser 7, the cylinder 401 is extended, the moving motor 402 drives the control gear 403 to rotate, drives the lower gear 406 to rotate, and drives the control shaft Rotate at 425, drive the lower inner tube 421 to rotate through the belt drive, drive the upper inner tube 420 to rotate, drive the chainsaw I418, the chainsaw II419 to rotate, the chainsaw I418, the chainsaw II419 cut off the original sea pipe standpipe 7, and compress the cylinder 401, The mobile 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, and drives the upper outer pipe 410 and the lower outer pipe 411 to rotate, and the upper jaw 412 and the lower jaw 413 will The original sea pipe standpipe 7 after cutting is moved into the hollow arc groove of the gear ring 504, the rotating motor 502 is started to drive the incomplete gear 503 to rotate, and the gear ring 504 is driven to rotate, and the new sea pipe riser 8 is facing the original sea pipe riser 7. The upper jaw 412 and the lower jaw 413 clamp the two ends of the new sea pipe riser 8, and the new sea pipe riser 8 is moved to the original sea pipe riser 7 through the reverse rotation of the moving motor 402, and the cylinder I 416, Cylinder Ⅱ 417 drives the extension of both ends of the new sea pipe riser 8. Since the two ends of the new sea pipe riser 8 are double-layer retractable structures, the new sea pipe riser 8 snaps into the inner and outer ends of the original sea pipe riser 7 to complete a single Replacement, when all sea pipe standpipes are replaced, control the control rod 607 through the telescopic cylinder 603, and the lower end thread of the control rod 607 is connected with the pressure water plate 608 Then, the balance motor 604 drives the pressure water plate 608 to move downward, and at the same time, through the valve B and the deflation pump, the pressure between the pressure water plate 608 and the waterproof plate 501 is controlled to reduce the seawater in the outer cabin 1 and increase the buoyancy of the outer cabin 1. .

The present invention is not limited to the above-mentioned specific implementation manners, and various transformations made by those skilled in the art starting from the above-mentioned concepts without creative work all fall within the protection scope of the present invention.

Claims (8)

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).

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