CN113060254A

CN113060254A - Method for installing telescopic propulsion device of deep water dynamic positioning crude oil transport ship

Info

Publication number: CN113060254A
Application number: CN202110227467.XA
Authority: CN
Inventors: 李�荣; 高航; 李毓洲; 王宣平; 郭晓东; 吴承恩; 俞健; 陈德林; 庄瑞民
Original assignee: Cosco Shipping Heavy Industry Co ltd; Qidong Cosco Sea Transportation Ocean Engineering Co ltd; Nantong Cosco Shipping Engineering Co ltd; Dalian University of Technology; Guangdong University of Technology
Current assignee: Cosco Shipping Heavy Industry Co ltd; Qidong Cosco Sea Transportation Ocean Engineering Co ltd; Nantong Cosco Shipping Engineering Co ltd; Dalian University of Technology; Guangdong University of Technology
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-07-02
Anticipated expiration: 2041-03-01
Also published as: CN113060254B

Abstract

The invention discloses a method for installing a retractable propulsion device of a deep-water dynamic positioning crude oil conveying vessel, comprising the following steps: step 1, preparatory work before installation; step 2, hoisting the propeller by means of a crane; step 3, installing the propeller on a platform step 4, install the lower guide rod assembly; step 5, install the upper guide rod assembly; step 6, install the hydraulic unit; step 7, telescopic test; step 8, install the main motor; step 9, temporarily attach the bottom plate Step 10, Install the hinge bolts of the upper guide plate seat; Step 11, Install the locking device; Step 12, Install the air panel of the locking device; Step 13, Install the bottom plate; Step 14, Report the Check and connect the remaining oil pipes, inject oil, and connect the cables to complete the installation of the retractable propulsion unit. As the installation method of the present invention is adopted, the work efficiency of the installation is greatly improved, and the error rate and the damage rate of the installation are reduced.

Description

Method for installing telescopic propulsion device of deep water dynamic positioning crude oil transport ship

Technical Field

The invention relates to the field of construction and assembly of deep-water dynamically positioned crude oil delivery ships, in particular to a method for installing a telescopic propulsion device of a deep-water dynamically positioned crude oil delivery ship.

Background

The existing installation method of the telescopic propulsion device of the deep water power positioning crude oil carrier has the following defects: firstly, because large-scale equipment is adopted, the size and the weight are large, and easily damaged parts such as a display instrument, a relay and a sensor are inevitably collided or scraped and damaged in the hoisting process, so that the preparation work before the installation is not emphasized, the subsequent installation progress is influenced, and the normal work of the equipment after the installation is influenced; secondly, because the installation process is not reasonable, the installation work efficiency is not high.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide a method for installing a telescopic propulsion device of a deep-water dynamic positioning crude oil carrier with high installation efficiency.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the installation method of the telescopic propulsion device of the deepwater dynamic positioning crude oil transport ship comprises the following steps:

step 1, preparation work before installation: the quick-wear parts such as a display instrument, a relay, a sensor and the like on the telescopic propelling device are dismounted or mounted with a protection device before hoisting so as to avoid damage; the exposed hole cover needs to be wrapped to prevent foreign matters from entering the hole cover, and all oil pipe openings need to be sealed; polishing and flattening the mounting surface of the upper guide plate seat by white cloth, and polishing and flattening the mounting surface of the lock hook seat in bulk; machining the two lower guide plate seats to enable the mounting surfaces of the lower guide plate seats and the lower guide rod to be well attached; mounting a coupling to the motor output shaft;

step 2, hoisting the propeller by using a crane: on the ship body installed in sections, when the installation section of the propulsion device is provided with relevant adjacent parts and outer plates by welding, and before the section is butted with the next section, a propeller is hung into the installation section of the propulsion device on the ship body by using a crane;

step 3, positioning and welding a propeller mounting platform;

step 4, mounting a lower guide rod assembly;

step 5, installing a guide rod assembly;

step 6, installing a hydraulic unit;

step 7, performing telescopic test;

step 8, installing a main motor;

step 9, temporarily attaching the bottom plate to a rib plate of the air guide sleeve;

step 10, mounting the hinged bolt of the upper guide plate seat: in the telescopic process, the position of the upper guide plate is properly adjusted according to the condition, hinged bolts of the upper guide plate and the guide plate seat are configured, and a limit switch box switch seat is installed;

step 11, mounting a locking device;

step 12, installing an air panel of the locking device: installing an air panel of the locking device on the ship body, connecting a compressed air pipe, and rechecking whether the locking device works normally without interference;

step 13, installing a bottom plate: adjusting a bottom plate of the propeller, lifting the propeller to a retracted position, adjusting the position of the bottom plate according to installation requirements, and installing the bottom plate on the propeller;

and 14, reporting and connecting the remaining oil pipes, injecting oil, and connecting cables to complete the installation of the telescopic propulsion device.

Further, in the step 2, hoisting the propeller into the propeller by using a crane specifically includes the following steps: 2.1, the propeller is positioned on the transportation frame, and the crane is connected with the lifting lug on the transportation frame and the lifting lug on the propeller; 2.2, hoisting and turning over the propeller to a vertical position by the crane; step 2.3, the lower guide plate is arranged below the propeller and tied to a lifting lug of the propeller through a rope; and 2.4, slowly hanging the propeller downwards into the surrounding well of the mounting section of the propeller device from the upper part.

Further, in step 3, the positioning and welding of the propeller mounting platform specifically includes the following steps: step 3.1, eight central positioning points (visible in a position of a mark) are arranged on the propeller mounting platform and can be used for positioning; step 3.2, checking through an observation port on the steering gear box, and confirming that the rudder angle is at the position of 0 degree before the platform is positioned and adjusted; 3.3, after the thruster is located on the deck, the allowable error of front, back, left and right is +/-2 mm, and data is recorded, and the levelness of the platform is adjusted by a level meter in the period, wherein the error of the levelness is +/-2 mm; step 3.4, after the adjustment is finished, before the platform is welded, whether the installation position is consistent with a drawing is confirmed again, and a gap between the air guide sleeve and the opening of the ship body is checked by using a vertical line, wherein the gap is not less than 50 mm; step 3.5, welding the propeller mounting platform to the ship body, monitoring deformation conditions in time in the welding process and adjusting the welding sequence; and 3.6, after welding, carrying out flaw detection on the welding seam and reporting the flaw detection.

Further, in the step 4, the step of installing the lower guide rod assembly specifically includes the following steps: step 4.1, mounting the right lower guide plate on the lower guide rod, and pre-connecting and fixing the right lower guide plate seat on the right lower guide plate by using a bolt; step 4.2, mounting the left lower guide plate on the lower guide rod, and pre-connecting and fixing the left lower guide plate seat on the left lower guide plate by using bolts; step 4.3, fixing the left lower guide plate and the right lower guide plate with the left lower guide plate seat and the right lower guide plate seat respectively through spot welding by using a welding machine; 4.4, adjusting the left lower guide plate seat and the right lower guide plate seat, and welding the left lower guide plate seat and the right lower guide plate seat to the ship body after the adjustment is finished; and 4.5, reaming the holes and mounting the hinged bolts.

Further, in step 5, before the upper guide rod assembly is installed, the temporary upper guide rod is removed, and then the formal upper guide rod assembly is installed, wherein the upper guide rod assembly comprises an upper guide rod, an upper guide plate and an upper guide plate seat, the upper guide plate in the upper guide rod assembly is fixed on the upper guide plate seat through bolts, the upper guide plate seat is divided into two halves, one half is welded with the hull, and the other half is welded with the upper guide rod in the upper guide rod assembly.

Further, in step 6, installing a hydraulic unit specifically includes the following steps: step 6.1, 5% of antirust oil is filled in the hydraulic unit, and the antirust oil in the oil tank is discharged before oil is injected; step 6.2, connecting the A1 pipeline, the A2 pipeline and the B1 pipeline on the propeller mounting platform with a hydraulic unit; 6.3, installing a hydraulic unit and a temporary pipeline for connecting the hydraulic unit and the telescopic hydraulic cylinder; step 6.4, injecting about 250 to 300L of hydraulic oil when the propeller is at the extending position; 6.5, blowing the equipment pipeline and the hydraulic cylinder by using a blowing tool; and 6.6, filling the energy accumulator with N2 gas, wherein the pressure of the N2 gas is 14.7MPa, and carrying out 2000cm high-capacity labor intensity distribution.

Further, in step 7, the telescoping test specifically includes the following steps: step 7.1, tying one end of a safety rope on the suspender, connecting the other end of the safety rope with the propeller, wherein the safety rope is not stressed under the non-emergency condition; and 7.2, retracting the propeller by using a hydraulic system to ensure that the propeller can be smoothly lifted.

Further, in the step 8, installing the main motor specifically includes the following steps: step 8.1, cleaning the base surface of the motor before installation, and respectively installing the two half parts of the coupling on the main motor and the propeller; 8.2, removing the cover of the propeller coupling and hoisting the main motor; 8.3, centering the motor and the propeller by using a dial indicator; 8.4, screwing the bolt and the gasket on the motor base, and confirming centering again; step 8.5, mounting components on the coupling and screwing bolts on the coupling; step 8.6, grease is injected into the coupling; and 8.7, installing a positioning pin on the motor base.

Further, in step 11, the step of installing the locking device specifically includes the following steps: step 11.1, adjusting a safety valve of the hydraulic unit to 8MPa, and gradually increasing a set value; step 11.2, slowly lifting the thruster and keeping the thruster at the retraction position; step 11.3, hoisting the locking device by using a hoist (about 1.5 tons); and 11.4, adjusting the locking device and welding the seat plate of the locking device to the ship body.

The invention has the beneficial effects that:

by adopting the installation method, the installation working efficiency is greatly improved, and the installation error rate and damage rate are reduced. The preparation work before the installation of the invention is beneficial to the smooth expansion and the continuous operation of the next procedure, in the installation work of the prior art, easily damaged parts such as display instruments, relays, sensors and the like are easy to collide or scrape and are damaged, and the protection device is required to be detached or installed before the hoisting, thereby greatly reducing the damage rate of the equipment. The exposed hole cover needs to be bound so as to prevent foreign matters from entering the hole cover and ensure that the equipment can work normally. The technical characteristics of the step 2 of the invention emphasize the hoisting point, the guide rod and the hydraulic cylinder are often used as the hoisting point of the propeller in the prior art, and the guide rod and the hydraulic cylinder are easily damaged in hoisting; the lower guide plate is arranged after the propeller is hoisted at the installation site, and the lower guide plate is arranged again for protecting the lower guide plate. The technical characteristics in step 7 of the present invention are two points: firstly, a safety rope is added during the telescopic test, and when the test is unsuccessful and an emergency occurs, the safety rope can limit and protect the propeller; and secondly, the front and back sequence of the telescopic test is changed, the telescopic test is started after the hydraulic unit is installed, the fault can be conveniently eliminated, the maintenance and overhaul of the equipment are facilitated, and the installation efficiency is improved.

Drawings

The invention is further described with the aid of the accompanying drawings, in which the embodiments do not constitute any limitation, and for a person skilled in the art, without inventive effort, further drawings may be obtained from the following figures:

FIG. 1 is an installation flow diagram of the present invention;

FIG. 2 is a schematic view of a thruster for hoisting connection;

FIG. 3 is a schematic illustration of the propeller of FIG. 2 after it has been hoisted;

FIG. 4 is a schematic view of eight center positioning points on the propeller mounting platform;

FIG. 5 is a schematic view of the installation of the lower guide bar assembly;

FIG. 6 is a schematic view of the temporary upper guide bar removed;

FIG. 7 is a schematic view of the upper guide bar assembly installed;

FIG. 8 is a schematic illustration of the installation of a hydraulic unit;

FIG. 9 is a schematic view of attaching the baseplate to the ribs of the pod.

In the figure: 1. hoisting a machine; 2. a propeller; 3. a transport rack; 4. the right lower guide plate; 5. a lower guide rod; 6. the right lower guide plate seat; 7. a left lower guide plate; 8. a lower guide rod; 9. a left lower guide plate seat; 10. a temporary upper guide bar; 11. an upper guide rod; 12. an upper guide plate; 13. an upper guide plate seat; 14. a propeller mounting platform; 15. a1 line; 16. a2 line; 17. a B1 line; 18. a hydraulic unit; 19. a base plate; 20. a pod; 21. a rib plate.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and specific embodiments, and it is to be noted that the embodiments and features of the embodiments of the present application can be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper surface", "lower surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "forward", "reverse", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

As shown in fig. 1, in the installation method of the retractable propulsion device of the deepwater dynamic positioning crude oil carrier, the retractable propulsion device to be installed is referred to as a retractable push, the bow of the carrier has two retractable pushes, namely a port retractable push and a starboard retractable push, and the types of the two retractable pushes are as follows: KST-220 LF/BR, wherein the design positions of the port telescopic push are as follows: the central position of the vertical axis is 730mm from the midship. The design positions of the starboard telescopic push are as follows: the vertical axis is centered at 2330mm from the midship. The telescopic pushers are specifically arranged on the deck surface of the ship body and directly welded with the deck surface during installation, and because the installation methods of the two telescopic pushers are the same, the patent only describes the installation method of one telescopic pusher.

The telescopic pusher comprises a propeller, a lower guide rod component, an upper guide rod component, a hydraulic unit, a main motor, a bottom plate, a guide cover, a locking device and the like.

The installation method specifically comprises the following steps:

step 1, preparation work before installation:

and (4) checking the integrity of all equipment, and checking whether the goods are consistent with the drawing according to random data and a packing list, wherein the goods are missed or not. And the appearance of the equipment is checked to see whether the equipment is damaged in the transportation and carrying processes. Checking all accessories according to a drawing and a packing list, and classifying and marking;

the quick-wear parts such as a display instrument, a relay, a sensor and the like on the telescopic propelling device are dismounted or mounted with a protection device before hoisting so as to avoid damage; the exposed hole cover needs to be wrapped to prevent foreign matters from entering the hole cover, and all oil pipe openings need to be sealed; polishing and flattening the mounting surface of the upper guide plate seat by white cloth, and polishing and flattening the mounting surface of the lock hook seat in bulk; machining the two lower guide plate seats to enable the mounting surfaces of the lower guide plate seats and the lower guide rod to be well attached; a coupling is mounted to the motor output shaft.

The preparation work before the installation helps the smooth expansion and the serialization of the next process to go on, and in the installation work of the prior art, vulnerable parts such as display instruments, relays and sensors are extremely easy to be collided or scraped and are damaged, and the protection device should be detached or installed before the hoisting, so that the damage rate of the equipment is greatly reduced. The exposed hole cover needs to be bound so as to prevent foreign matters from entering the hole cover and ensure that the equipment can work normally.

Step 2, hoisting the propeller by using a crane: the telescopic propeller weighs about 53.1 tons, and on the ship body installed by sections, when the installation section of the propelling device is welded, related adjacent parts and outer plates are welded, and before the section is butted with the next section, the propeller is hung into the installation section of the propelling device on the ship body by using a crane.

In step 2, as shown in fig. 2 and 3, hoisting the propeller 2 by using the crane 1 specifically includes the following steps: 2.1, the propeller 2 is positioned on the transportation frame 3, and the crane 1 is connected with a lifting lug on the transportation frame 3 and a lifting lug on the propeller 2; 2.2, hoisting and turning over the propeller to a vertical position by the crane; step 2.3, the lower guide plate is arranged below the propeller and tied to a lifting lug of the propeller through a rope; and 2.4, slowly hanging the propeller downwards into the surrounding well of the mounting section of the propeller device from the upper part.

When the propeller is hung, the following matters need to be taken into consideration:

a. all guide rods and hydraulic cylinders cannot be used as lifting points of the propeller. The surfaces of all moving parts can not use steel wire ropes as hoisting locks. These surfaces are to be protected exceptionally;

b. when the propeller is hoisted, the equipment on the gear box is protected by cloth, rubber, protective plates and the like to prevent the equipment from being scraped by the hoisting tool.

c. If the hydraulic pipe influences the hoisting, the hydraulic pipe is dismantled and sealed protection is timely made.

d. Because the center of gravity of the equipment is not positioned in the center of the propeller, the propeller can incline during hoisting.

e. Care is taken not to touch the hull structure damaging equipment (especially the gearbox and telescoping ducts).

f. If the boat hull is touched carelessly, the paint repair should be noticed.

The beneficial effects produced by the step 2 are as follows: the lifting point is emphasized, in the prior art, the guide rod and the hydraulic cylinder are often used as the lifting point of the propeller, and the guide rod and the hydraulic cylinder are easily damaged in the lifting process; the lower guide plate is arranged after the propeller is hoisted at the installation site, and the lower guide plate is arranged again for protecting the lower guide plate.

Step 3, positioning and welding a propeller mounting platform:

the method specifically comprises the following steps: step 3.1, eight central positioning points are arranged on the propeller mounting platform, the positioning points are represented by stars in the figure, and can be used for positioning as shown in figure 4; step 3.2, checking through an observation port on the steering gear box, and confirming that the rudder angle is at the position of 0 degree before the platform is positioned and adjusted; 3.3, after the thruster is located on the deck, the allowable error of front, back, left and right is +/-2 mm, and data is recorded, and the levelness of the platform is adjusted by a level meter in the period, wherein the error of the levelness is +/-2 mm; step 3.4, after the adjustment is finished, before the platform is welded, whether the installation position is consistent with a drawing is confirmed again, and a gap between the air guide sleeve and the opening of the ship body is checked by using a vertical line, wherein the gap is not less than 50 mm; step 3.5, welding the propeller mounting platform to the ship body, monitoring deformation conditions in time in the welding process and adjusting the welding sequence; and 3.6, after welding, carrying out flaw detection on the welding seam and reporting the flaw detection.

Step 4, installing a lower guide rod assembly:

the method specifically comprises the following steps: as shown in fig. 5, step 4.1, mounting the right lower guide 4 (about 482 kg) on the lower guide bar 5, and pre-fastening the right lower guide holder 6 to the right lower guide 4 with bolts; step 4.2, mounting the left lower guide plate 7 (about 637 kg) on a lower guide rod 8, and pre-connecting and fixing the left lower guide plate seat 9 on the left lower guide plate 7 by using bolts; step 4.3, fixing the left lower guide plate and the right lower guide plate with the left lower guide plate seat and the right lower guide plate seat respectively through spot welding by using a welding machine; 4.4, adjusting the left lower guide plate seat and the right lower guide plate seat, and welding the left lower guide plate seat and the right lower guide plate seat to the ship body after the adjustment is finished; and 4.5, reaming the holes and mounting the hinged bolts.

Step 5, installing a guide rod assembly:

as shown in fig. 6 and 7, before the upper guide rod assembly is installed, the temporary upper guide rod 10 is removed, and then the formal upper guide rod assembly is installed, wherein the upper guide rod assembly comprises an upper guide rod 11, an upper guide plate 12 and an upper guide plate seat 13, the upper guide plate in the upper guide rod assembly is fixed on the upper guide plate seat by bolts, the upper guide plate seat is divided into two halves, one half is welded with the hull, and the other half is welded with the upper guide rod in the upper guide rod assembly.

Step 6, installing a hydraulic unit:

as shown in fig. 8, the method specifically includes the following steps: step 6.1, 5% of antirust oil is filled in the hydraulic unit, and the antirust oil in the oil tank is discharged before oil is injected; step 6.2, connecting the A1 pipeline 15, the A2 pipeline 16 and the B1 pipeline 17 on the propeller mounting platform 14 with the hydraulic unit 18; 6.3, installing a hydraulic unit and a temporary pipeline for connecting the hydraulic unit and the telescopic hydraulic cylinder; step 6.4, injecting about 250 to 300L of hydraulic oil when the propeller is at the extending position; 6.5, blowing the equipment pipeline and the hydraulic cylinder by using a blowing tool; and 6.6, filling the energy accumulator with N2 gas, wherein the pressure of the N2 gas is 14.7MPa, and carrying out 2000cm high-capacity labor intensity distribution.

Step 7, stretching test:

the telescopic test specifically comprises the following steps: step 7.1, tying one end of a safety rope on the suspender, connecting the other end of the safety rope with the propeller, wherein the safety rope is not stressed under the non-emergency condition; and 7.2, retracting the propeller by using a hydraulic system to ensure that the propeller can be smoothly lifted.

The telescoping test in step 7 has two technical characteristics: firstly, a safety rope is added during the telescopic test, and when the test is unsuccessful and an emergency occurs, the safety rope can limit and protect the propeller; and secondly, the front and back sequence of the telescopic test is changed, the telescopic test is started after the hydraulic unit is installed, the fault can be conveniently eliminated, the maintenance and overhaul of the equipment are facilitated, and the installation efficiency is improved.

Step 8, installing a main motor:

the method for installing the main motor specifically comprises the following steps: step 8.1, cleaning the base surface of the motor before installation, and respectively installing the two half parts of the coupling on the main motor and the propeller; step 8.2, removing the cover of the propeller coupling, and hoisting the main motor (about 6.7 tons); 8.3, centering the motor and the propeller by using a dial indicator; 8.4, screwing the bolt and the gasket on the motor base, and confirming centering again; step 8.5, mounting components on the coupling and screwing bolts on the coupling; step 8.6, grease is injected into the coupling; and 8.7, installing a positioning pin on the motor base.

Step 9, temporarily attaching the bottom plate 19 to the rib plate 21 of the air guide sleeve 20, as shown in fig. 9.

Step 10, mounting the hinged bolt of the upper guide plate seat: in the telescopic process, the position of the upper guide plate is properly adjusted according to the condition, the hinged bolts of the upper guide plate and the guide plate seat are configured, and the limit switch box switch seat is installed.

Step 11, mounting a locking device:

in step 11, the step of installing the locking device specifically includes the following steps: step 11.1, adjusting a safety valve of the hydraulic unit to 8MPa, and gradually increasing a set value; step 11.2, slowly lifting the thruster and keeping the thruster at the retraction position; step 11.3, hoisting the locking device by using a hoist (about 1.5 tons); and 11.4, adjusting the locking device and welding the seat plate of the locking device to the ship body.

Notes in step 11:

a. the angle between the lock hook and the lock hook body is ensured to be 90 degrees during installation, and the lock hook is inclined when being opened.

b. And effective measures are taken to reduce welding deformation during welding of the lock hook seat.

c. Do not adjust the length of the cylinder (KHI adjusted).

d. The clearance between the locking device and the hanger bar is checked and adjusted to be about 10mm by slightly grinding the locking hook or welding the steel plate if necessary.

Step 12, installing an air panel of the locking device: and installing an air panel of the locking device on the ship body, connecting a compressed air pipe, and rechecking whether the locking device works normally without interference.

Step 13, installing a bottom plate: and adjusting the bottom plate of the propeller, lifting the propeller to a folded position, adjusting the position of the bottom plate according to the installation requirement, and installing the bottom plate on the propeller.

Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. a retractable propulsion device installation method of a deep-water dynamic positioning crude oil delivery vessel, is characterized in that, comprises the following steps:

Step 1. Preparations before installation: Remove or install protective devices on the vulnerable parts of the retractable propulsion device before hoisting to avoid damage; the exposed hole covers need to be wrapped to prevent foreign objects from entering, and all oil pipe openings must be sealed well ; Use a white cloth to grind the upper guide plate seat mounting surface to level, and grind the loose lock hook seat mounting surface to level; Machine the two lower guide plate seats, so that the lower guide plate seat mounting surface and the lower guide rod mounting surface can be well Fitting; install the coupling to the motor output shaft;

Step 2. Use a crane to hoist the propeller: on the hull installed in sections, when the installation section of the propulsion device has completed the welding of the relevant adjacent parts and outer plates, and before this section is docked with the next section, use The crane lifts the propeller into the installation section of the propulsion device on the hull;

Step 3. Positioning and welding of the thruster installation platform;

Step 4. Install the lower guide rod assembly;

Step 5. Install the upper guide rod assembly;

Step 6. Install the hydraulic unit;

Step 7, scaling test;

Step 8. Install the main motor;

Step 9. Temporarily attach the bottom plate to the ribs of the shroud;

Step 10. Install the hinge bolts of the upper guide plate seat: During the expansion and contraction process, adjust the position of the upper guide plate according to the situation, configure the hinge bolts of the upper guide plate and the guide plate seat, and install the limit switch box switch seat;

Step 11. Install the locking device;

Step 12. Install the air panel of the locking device: Install the air panel of the locking device to the hull, then connect the compressed air pipe, and check whether the locking device works normally without interference;

Step 13. Bottom plate installation: Adjust the bottom plate of the propeller, lift the propeller to the retracted position, adjust the position of the bottom plate according to the installation requirements and install it on the propeller;

Step 14. Apply for inspection and connect the remaining oil pipes, inject oil, and connect cables to complete the installation of the retractable propulsion device.

2. The method for installing a retractable propulsion device of a deep-water dynamic positioning crude oil carrier according to claim 1, characterized in that: in the step 2, using a crane to hoist the propeller specifically comprises the following steps: Step 2.1, the propeller Located on the transport frame, the crane is connected to the lifting lug on the transport frame and the lifting lug on the propeller; Step 2.2, the crane lifts and flips the propeller to the upright position; Step 2.3, installs the lower guide plate under the propeller and uses The rope is tied to the lifting lug of the thruster; step 2.4, slowly lift the thruster downward from above into the enclosure of the thruster installation section.

3. The telescopic propulsion device installation method of the deep water dynamic positioning crude oil carrier according to claim 1, is characterized in that: in the described step 3, the positioning and welding of the propeller installation platform specifically comprises the following steps: Step 3.1, There are eight central positioning points on the thruster installation platform, which can be used for positioning; step 3.2, check through the observation port on the rudder gear box, and confirm that the rudder angle is at 0° before positioning the platform; step 3.3, the thruster After being seated on the deck, the allowable error of the front, rear, left and right is ±2mm, and the data is recorded. During the period, the level of the platform is adjusted with a spirit level, and the level error is ±2mm; Step 3.4. After adjustment, before welding the platform, Confirm again whether the installation position is consistent with the drawing, and use the vertical line to check the gap between the shroud and the opening of the hull, the gap is not less than 50mm; Step 3.5, Weld the propeller installation platform to the hull, monitor the deformation in time during the welding process, and check the Adjust the welding sequence; step 3.6, after welding, carry out flaw detection on the weld and report for inspection.

4. The method for installing a telescopic propulsion device of a deep-water dynamic positioning crude oil carrier according to claim 1, characterized in that: in the step 4, installing the lower guide rod assembly specifically includes the following steps: Step 4.1, installing the lower right Connect the guide plate to the lower guide rod, and pre-connect the right lower guide plate seat to the right lower guide plate with bolts; Step 4.2, install the left lower guide plate to the lower guide rod, and pre-connect the left lower guide plate seat to the left side with bolts lower guide plate; step 4.3, use the welding machine to fix the left and right lower guide plates to the left and right lower guide plate seats respectively by spot welding; step 4.4, adjust the left and right lower guide plate seats, after the adjustment, place the left and right lower guide plate seats Weld to hull; step 4.5, ream holes and install hinge bolts.

5. The method for installing a telescopic propulsion device of a deep-water dynamic positioning crude oil carrier according to claim 1, wherein in the step 5, before installing the upper guide rod assembly, the temporary upper guide rod is first removed, and then the upper guide rod is removed. Install the formal upper guide rod assembly. The upper guide rod assembly includes the upper guide rod, the upper guide plate and the upper guide plate seat, and the upper guide plate in the upper guide rod assembly is bolted to the upper guide plate seat. The upper guide plate seat is divided into two halves , one half has been welded to the hull, and the other half is welded to the upper guide rod in the upper guide rod assembly.

6. The method for installing a telescopic propulsion device of a deep-water dynamic positioning crude oil carrier according to claim 1, characterized in that: in the step 6, installing a hydraulic unit specifically includes the following steps: Step 6.1, the hydraulic unit has its 5% capacity of anti-rust oil, drain the anti-rust oil in the oil tank before filling; Step 6.2. Connect the A1 pipeline, A2 pipeline and B1 pipeline on the thruster installation platform to the hydraulic unit; Step 6.3, Install the hydraulic unit and connect the temporary piping between the hydraulic unit and the telescopic hydraulic cylinder; step 6.4, when the propeller is in the extended position, inject about 250 to 300L of hydraulic oil; step 6.5, use a blowing tool to pipe the equipment Blow through the road and hydraulic cylinder; Step 6.6, fill the accumulator with N2 gas.

7. The method for installing a retractable propulsion device of a deep-water dynamic positioning crude oil carrier according to claim 6, characterized in that: the pressure of the N2 gas is 14.7MPa. The capacity is 2000cm³.

8. The method for installing a telescopic propulsion device of a deep-water dynamic positioning crude oil carrier according to claim 1, characterized in that: in the step 7, the telescopic test specifically includes the following steps: Step 7.1, tie one end of the safety rope to On the boom, the other end is connected to the propeller, and the safety rope is not stressed in non-emergency situations; Step 7.2, retract the propeller with the hydraulic system to ensure that the propeller can be raised and lowered smoothly.

9. The method for installing a telescopic propulsion device of a deep-water dynamic positioning crude oil carrier according to claim 1, characterized in that: in the step 8, installing the main motor specifically includes the following steps: Step 8.1, before installation, clean up the motor the base surface, and install the two halves of the coupling to the main motor and the thruster respectively; step 8.2, remove the cover of the thruster coupling, and lift the main motor; step 8.3, use a dial indicator for alignment Motor and propeller; Step 8.4, Tighten the bolts and washers on the motor base, and confirm the alignment again; Step 8.5, Install the parts on the coupling, and tighten the bolts on the coupling; Step 8.6, Align the coupling Add grease; step 8.7, install the positioning pin on the motor base.

10. The method for installing a retractable propulsion device of a deep-water dynamic positioning crude oil carrier according to claim 1, wherein in the step 11, the installation of the locking device specifically includes the following steps: Step 11.1, adjusting the safety of the hydraulic unit valve to 8MPa, and gradually increase the set value; step 11.2, slowly raise the propeller and keep it in the retracted position; step 11.3, lift the locking device with a hoist; step 11.4, adjust the locking device and lock the The seat plate of the tight fitting is welded to the hull.