Flushing system and flushing method for bow and stern unloading oil pipeline

Abstract

The flushing system comprises a sliding platform capable of sliding between the interior of a ship board and the exterior of the ship board, the sliding platform is provided with a lifting seat capable of ascending and descending, and the lifting seat is provided with a valve connecting plate used for being connected with a hose tail end valve. The valve connecting plate and the hose tail end valve are locked and fixed through a plurality of groups of locking devices; a jacking mechanism is arranged on the valve connecting plate, and a one-way valve in a valve at the tail end of the hose is opened through the jacking action of the jacking mechanism; the valve connecting plate is provided with a flow guide opening, the flow guide opening is connected with a flow guide pipeline, flushing fluid of the oil conveying hose is guided out through the flow guide pipeline, and a flow guide valve is arranged on the flow guide pipeline. According to the system, the oil conveying pipeline can be directly washed outside a ship board, the washing and maintaining time of the oil conveying pipeline can be shortened, the oil conveying pipeline system can be rapidly and safely washed, and meanwhile the purposes of reducing the labor intensity of workers and guaranteeing safe production of equipment are achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bow and stern unloading oil transfer operation, and particularly relates to a bow and stern unloading oil transfer pipeline flushing system and a flushing method. BACKGROUND

[0002] Ocean oil exploitation is an important means to solve human energy demand, and a bow and stern unloading system is a main oil transfer structure of an FPSO and is also commonly used in some oil exploitation and production platforms. With the progress of science and technology, the exploitation and processing efficiency is greatly improved, and oil transfer operation becomes an important factor affecting output.

[0003] In principle, the oil transfer hose needs to be flushed after each bow and stern unloading oil transfer operation to ensure normal and safe operation of the oil transfer system. The oil pipe end connected with the shuttle tanker is located outside the hull, and the hose end valve needs to be pulled to the inside of the hull deck to perform the operation. The offshore flushing operation has high safety risks, is complex to operate, and takes a long time, which is not conducive to improving the oil transfer operation efficiency. SUMMARY

[0004] According to the defects of the prior art, the application provides a bow and stern unloading oil transfer pipeline flushing system and a flushing method, which can move inside and outside the hull to achieve safe, simple, time-saving and labor-saving purposes of bow and stern unloading oil transfer pipeline flushing operation.

[0005] To achieve the above purpose, the technical solution adopted by the application is as follows: a bow and stern unloading oil transfer pipeline flushing system, comprising a sliding platform capable of sliding between the inside and outside of the hull, a lifting seat capable of lifting is arranged on the sliding platform, a valve connecting plate for connecting a hose end valve is arranged on the lifting seat, the valve connecting plate and the hose end valve are locked and fixed through a plurality of locking devices; a jacking mechanism is arranged on the valve connecting plate, and the jacking mechanism is used to open a one-way valve in the hose end valve through a jacking action; a flow guide opening is arranged on the valve connecting plate, a flow guide pipeline is connected to the flow guide opening, flushing liquid in the oil transfer hose is discharged through the flow guide pipeline, and a flow guide valve is arranged on the flow guide pipeline.

[0006] Further, a sealing ring is arranged on the upper surface of the valve connecting plate, and the sealing ring is located outside the outlet channel of the hose end valve.

[0007] Further, a plurality of buffer springs are arranged between the valve connecting plate and the lifting seat.

[0008] Further, the jacking mechanism comprises a jacking hydraulic cylinder and a jacking block, the extension end of the jacking hydraulic cylinder is connected to the jacking block, the jacking block is driven to linearly displace along the vertical direction, and the jacking block is centered with the one-way valve in the hose end valve.

[0009] Further, the jacking hydraulic cylinder is fixed on the valve connecting plate and synchronously rises and falls with the valve connecting plate, the valve connecting plate is provided with an assembly hole, the jacking hydraulic cylinder is fixed below the assembly hole, the assembly hole is assembled with the jack, the extension end of the jacking hydraulic cylinder is connected with the jack and drives the jack to rise and fall, when the jack is at the bottom limit position, the upper surface of the jack is flush with the upper surface of the valve connecting plate, when the jack is at the top limit position, the one-way valve in the hose end valve is opened.

[0010] Further, the valve connecting plate is provided with a first threaded hole and a second threaded hole, the first threaded hole is used for connecting a safety valve, when the pressure of the oil pipeline system is overloaded, the safety valve is used for pressure relief, the second threaded hole is used for connecting monitoring instruments, when the monitoring system of the external pipeline is not used or cannot work, the external detection device such as temperature, pressure and flow rate is connected, and operation basis is provided in the operation process.

[0011] Further, the sliding platform is provided with vertical lifting rails, and a lifting seat is arranged on the lifting rails and lifts along the lifting rails; the lifting seat is lifted by hydraulic power; the sliding platform is provided with a manual pump for controlling the lifting seat, the lifting hydraulic cylinder is controlled by the manual pump, and the lifting hydraulic cylinder is connected with and controls the lifting seat.

[0012] Further, the locking device comprises a locking hook and a locking bolt, one end of the locking hook is hinged below the valve connecting plate, the other end of the locking hook is connected with the locking bolt, when the locking hook is turned upward, the valve connecting plate and the port outer edge of the hose end valve are clamped into the locking port of the locking hook, the locking bolt is rotated and abuts against the upper surface of the outer edge of the hose end valve, and the valve connecting plate and the hose end valve are locked; a plurality of locking devices are uniformly arranged in the circumferential direction.

[0013] Preferably, the locking device is six groups and is arranged at an interval of 60 degrees.

[0014] Further, a platform base is arranged on the deck, the connecting bottom plate of the sliding rail is fixed with the platform base through fasteners, and the sliding platform slides between the inside of the ship side and the outside of the ship side along the sliding rail.

[0015] Further, a stop block is arranged at one end of the sliding rail close to the ship side, which is used for limiting the limit position of the sliding platform moving to the outside of the ship side; and a limit stopper is arranged at the other end of the sliding rail away from the ship side, which is used for limiting the moving position of the sliding platform during recovery.

[0016] Based on the above technical scheme, the stop block prevents the sliding platform from derailing into the sea when moving to the outside of the ship side, and the sliding platform does not touch the stop block during normal operation. Therefore, the stop block is arranged only at the outermost position of the sliding rail.

[0017] Further, the sliding platform is slidably connected to the sliding rail through a sliding carriage at the bottom, the sliding carriage is arranged at the inner side of the sliding platform, so that the outer side of the sliding platform can project to the outside of the ship side, and the valve connecting plate on the sliding platform is directly below the hose end valve.

[0018] Further, a sliding hydraulic cylinder is fixed on the deck, the telescopic end of the sliding hydraulic cylinder is connected with the sliding platform and drives the sliding platform to slide along the sliding rail.

[0019] Further, the sliding platform is provided with a platform ladder, and the operator can go up and down the sliding platform through the platform ladder.

[0020] Further, the bottom of the sliding platform is a platform grid formed by welding, and a guardrail is arranged above the platform grid.

[0021] Further, the end of the flow guide pipe is connected to the ship washing system circuit.

[0022] Further, an oil receiving groove is arranged below the sliding platform, the oil receiving groove is below the platform grid and is integrated with the frame of the sliding platform, the oil receiving groove is directly below the valve connecting plate, and is used for collecting the oil and water mixture leaked from the inside of the oil delivery hose or the washing process, the oil receiving groove is connected with a discharge pipeline, the outlet of the discharge pipeline is connected to the dirty oil tank inside the FPSO ship body, the residual oil and the oil and water mixture collected in the oil receiving groove are discharged to the dirty oil tank inside the FPSO ship body for unified treatment, and a discharge valve is arranged on the discharge pipeline.

[0023] The washing method of the bow and stern unloading oil pipeline washing system comprises the following steps: Step one, before the washing operation, the sliding platform is moved to the outside of the ship side by hydraulic drive, so that the valve connecting plate is directly below the hose end valve; Step two, the hose winch cylinder is controlled to rotate, and the hose end valve is lowered above the valve connecting plate; Step three, the lifting seat is raised, so that the valve connecting plate is in contact with the end surface of the hose end valve; Step four, the valve connecting plate and the hose end valve are locked and fixed through the locking device, so that the valve connecting plate and the hose end valve are tightly connected with the end surface, and a sealed state is achieved; Step five, whether the flow guide pipe is connected well is checked, and the flow guide valve is opened; Step six, the discharge valve is opened; Step seven, the one-way valve in the hose end valve is opened through the lifting action of the jacking mechanism; Step eight, the oil delivery hose washing operation is started, after the washing liquid is washed in the oil delivery hose, the washing liquid enters the flow guide pipe through the hose end valve; Step nine, after the oil delivery hose flushing operation is completed, first confirm whether the oil delivery hose is empty and depressurized; after confirming that the oil delivery hose is empty and depressurized, the lifting mechanism is lowered, and the one-way valve in the hose end valve is closed; Step ten, close the flow guide valve first, then open the locking device to release the hose end valve; Step eleven, lower the lifting seat, separate the valve connecting plate from the hose end valve; Step twelve, close the discharge valve after the receiving tank is empty; Step thirteen, recover the sliding platform to the inside of the ship side.

[0024] Further, in step eight, the flushing liquid enters the ship body flushing system circuit through the flow guide pipe.

[0025] Further, in step nine, the detection equipment of the oil delivery hose is used to confirm whether the oil delivery hose is empty and depressurized.

[0026] Further, in steps ten and eleven, after the locking device is opened, the valve connecting plate surface is cleaned and recovered.

[0027] The beneficial effects of the present application are: the flushing system of the present application can directly perform oil delivery pipeline flushing operation outside the ship side, without the need to pull the hose end valve of the oil delivery pipeline to the inside of the ship deck, which can shorten the oil delivery pipeline flushing and maintenance time, realize quick and safe flushing operation of the oil delivery pipeline system, and achieve the purpose of reducing personnel working intensity and ensuring equipment safety production. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a front view of the flushing system structure of the present application; Figure 2 is a side view of Figure 1 ; Figure 3 is an enlarged view of Figure 2 M in ; Figure 4 Figure 2 is an enlarged view of the locking device in ; Figure 5 Figure 1 is a top view of ; Figure 6 Figure 5 is an enlarged view of the valve connecting plate in ; Figure 7 is a bottom view of Figure 1 ; Figure 8 is a schematic diagram of the sliding platform recovered to the inside of the ship side; Figure 9 is a schematic diagram of the sliding platform moved out to the outside of the ship side; Figure 10 is a schematic diagram of the working state of the flushing system; Figure 11 is a schematic diagram of the valve connecting plate and its external connecting structure; Figure 12 is Figure 11 the A-A sectional view of the valve connecting plate; Figure 13 is Figure 11 the B-B sectional view of the valve connecting plate; Figure 14 is Figure 11 the D-D sectional view of the valve connecting plate; In the figure: 1, sliding platform, 101, platform ladder, 102, platform grating, 103, guardrail handrail, 2, lifting seat, 3, valve connecting plate, 301, flow guide port, 4, buffer spring, 5, locking device, 501, locking hook, 502, locking bolt, 6, jacking mechanism, 601, jacking hydraulic cylinder, 602, jacking block, 7, flow guide pipeline, 8, flow guide valve, 9, deck, 10, platform base, 11, sliding rail, 1101, connecting bottom plate, 12, stop block, 13, sliding carriage, 14, hose end valve, 15, sliding hydraulic cylinder, 16, lifting guide rail, 17, manual hydraulic pump, 18, sealing ring, 19, discharge pipeline, 20, discharge valve, 21, oil receiving groove, 22, oil delivery hose, 23, first threaded hole, 24, second threaded hole, 25, limiter, 26, control console; P, inside of the ship side, Q, outside of the ship side. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0030] Referring to the accompanying Figures 1-14 , the bow and stern unloading oil pipeline flushing system specifically comprises a sliding platform 1, a lifting seat 2, a valve connecting plate 3, a buffer spring 4, a locking device 5, a jacking mechanism 6, a flow guide pipeline 7 and the like.

[0031] The sliding platform 1 can slide between the inside of the ship side and the outside of the ship side, the sliding platform 1 is a manned platform, the sliding platform 1 is provided with a platform ladder 101, and an operator slides the sliding platform 1 up and down through the platform ladder 101. The bottom of the sliding platform 1 is a platform grating 102 formed by welding, and a guardrail handrail 103 is arranged around the top of the platform grating 102.

[0032] The platform base 10 is arranged on the deck 9 of the hull, the connecting bottom plate 1101 of the sliding track 11 is fixed to the platform base 10 by fasteners, and the sliding platform 1 slides along the sliding track 11 between the inside and outside of the ship side. The sliding track 11 is provided with a stop block 12 at the outer side end close to the ship side, which is used to limit the limit position of the sliding platform 1 moving to the outside of the ship side, and prevent derailment. The sliding track 11 is provided with a position limiter 25 at the inner side end away from the ship side, which is used to limit the moving position of the sliding platform during recovery by an electric signal, and the sliding platform 1 stops moving after reaching the position limiter 25, which is similar to an emergency brake device. The sliding platform 1 is slidably connected to the sliding track 11 through the slide 13 at the bottom, and the slide 13 is arranged at the inner side part of the sliding platform 1, so that the outer side part of the sliding platform 1 can be extended to the outside of the ship side, and the valve connecting plate 3 on the sliding platform is directly below the hose end valve 14. The sliding hydraulic cylinder 15 is fixed on the deck 9, and the telescopic end of the sliding hydraulic cylinder 15 is connected with the sliding platform 1 and drives the sliding platform 1 to slide along the sliding track 11. The sliding platform 1 is controlled to reach the specified position by the control console 26, and can be connected with the hose end valve 14 for operation.

[0033] In another technical scheme, the sliding platform 1 moves at the lower part of the hose winch cylinder body, and when the sliding hydraulic cylinder 15 is extended to the limit position, i.e. the sliding platform 1 moves to the outer limit position, the valve connecting plate 3 on the sliding platform 1 is directly below the hose end valve 14.

[0034] The lifting seat 2 is arranged on the sliding platform 1 and can be lifted by hydraulic drive. The lifting seat 2 is arranged on the lifting guide 16 in the vertical direction and is lifted along the lifting guide 16; the lifting seat 2 is lifted by hydraulic power; the sliding platform is provided with a manual hydraulic pump 17 for controlling the lifting seat, the lifting hydraulic cylinder is controlled by the manual hydraulic pump 17, and the lifting hydraulic cylinder is connected with and controls the lifting seat 2 to lift on the sliding platform 1.

[0035] The valve connecting plate 3 is arranged above the lifting seat 2, a plurality of buffer springs 4 are arranged between the valve connecting plate 3 and the lifting seat 2, the valve connecting plate 3 is used to connect the hose end valve 14, the outlet of the hose end valve 14 is closed by the valve connecting plate 3, the valve connecting plate 3 and the hose end valve 14 are locked and fixed by a plurality of locking devices 5, so that the valve connecting plate 3 and the hose end valve 14 maintain a sealed state. The upper surface of the valve connecting plate 3 is provided with a sealing ring groove, and a sealing ring 18 is assembled in the sealing ring groove. The sealing ring 18 is located outside the outlet channel of the hose end valve 14, and can seal the outlet of the hose end valve 14 in the sealing ring 18.

[0036] The locking device 5 comprises a locking hook 501 and a locking bolt 502, one end of the locking hook 501 is hinged below the valve connecting plate 3, the other end of the locking hook 501 is connected with the locking bolt 502, when the locking hook 501 is turned up, the valve connecting plate 3 and the port outer edge of the hose end valve 14 are clamped into the locking port of the locking hook 501, the locking bolt 502 is rotated to abut against the upper surface of the outer edge of the hose end valve 14, and the valve connecting plate 3 and the hose end valve 14 are locked; the locking device 5 is six groups, and is uniformly arranged at intervals of 60 degrees in the circumferential direction.

[0037] The jacking mechanism 6 is arranged on the valve connecting plate 3, and the jacking mechanism 6 is used to open the one-way valve in the hose end valve 14 through the jacking action. The jacking mechanism 6 comprises a jacking hydraulic cylinder 601 and a jacking block 602, the jacking hydraulic cylinder 601 is fixed below the valve connecting plate 3 and synchronously lifts and lowers with the valve connecting plate 3, the jacking hydraulic cylinder 601 is controlled by a hand pump, an assembly hole is arranged on the valve connecting plate 3, the jacking hydraulic cylinder 601 is fixed below the assembly hole, the jacking block 602 is assembled in the assembly hole, the telescopic end of the jacking hydraulic cylinder 601 is connected with the jacking block 602, and the jacking block 602 is driven to linearly displace in the vertical direction to lift and lower, when the jacking block 602 is in the bottom limit position, the upper surface of the jacking block 602 is flush with the upper surface of the valve connecting plate 3, the jacking block 602 is centered with the one-way valve in the hose end valve 14, and when the jacking block 602 is in the top limit position, the one-way valve in the hose end valve 14 is opened.

[0038] Based on the above technical scheme, the jacking block 602 is composed of a top plate and a guide column, the cross section of the jacking block 602 is T-shaped, the top plate is matched with the assembly hole of the valve connecting plate 3 and can seal the assembly hole of the valve connecting plate 3 to a certain extent, the guide column is slidingly arranged in the sliding cavity of the lower fixing member of the assembly hole, a jacking block sealing ring is arranged between the guide column and the sliding cavity, in the lifting state, the lifting height of the jacking block 602 is less than the thickness of the top plate, the bottom of the jacking block 602 is still in the assembly hole, and the jacking block 602 plays a role of preventing the flushing liquid from entering the assembly hole, and cooperates with the jacking block sealing ring to play a sealing role.

[0039] A flow guide port 301 is arranged on the valve connecting plate 3, a flow guide pipe 7 is connected to the flow guide port 301, the flushing liquid of the oil delivery hose is guided out through the flow guide pipe 7, a flow guide valve 8 is arranged on the flow guide pipe 7, and the end of the flow guide pipe 7 is connected to the ship body flushing system circuit through a quick plug connector.

[0040] Based on the above technical scheme, the flow guide pipe connected to the flow guide port 301 is a separate vertical interface pipe, the interface pipe and the lower half of the flow guide pipe are connected through a flange, and a gasket for sealing is arranged at the flange interface. The flow guide valve is arranged on the flow guide pipe after the flange interface, so that the flow guide pipe and the flow guide valve can be easily disassembled and maintained.

[0041] The valve connecting plate is provided with a first threaded hole 23 and a second threaded hole 24, the first threaded hole 23 is used for connecting a safety valve, when the pressure of the oil pipeline system is overloaded, the safety valve is used for pressure relief, so that the operation is safe. The second threaded hole 24 is used for connecting a monitoring instrument, when the external pipeline monitoring system is not used or the monitoring system cannot work, the external detection device (such as temperature, pressure, flow rate, etc.) is connected here, and operation basis is provided in the operation process.

[0042] The bottom of the sliding platform 1 is provided with an oil receiving groove 21, the oil receiving groove 21 is located below the platform grid 102 and is integrated with the frame of the sliding platform 1, the oil receiving groove 21 is located directly below the valve connecting plate 3, and is used for collecting the oil and water leaked in the inside of the oil conveying hose or in the flushing process. The oil receiving groove 21 is connected with a discharge pipeline 19, the outlet of the discharge pipeline 19 is connected to an oil tank in the FPSO ship body, the residual oil and the oil-water mixture collected in the oil receiving groove 19 are discharged to the oil tank in the FPSO ship body for unified treatment, and the discharge pipeline 19 is provided with a discharge valve 20. Based on the above technical scheme, the bottom of the sliding platform 1 is the platform grid 102 formed by welding, the oil and water leaked in the inside of the oil conveying hose or in the flushing process can fall into the oil receiving groove 19 through the platform grid 102, according to the environmental protection requirement, the residual oil and the oil-water mixture collected in the oil receiving groove cannot be directly discharged into the sea, and are recovered to the oil tank in the FPSO ship body for unified treatment.

[0043] In the flushing system, a special platform base 10 is arranged at a proper position of the ship deck 9, the connecting bottom plate of the sliding rail 11 is fixed with the platform base 10 through fasteners, the sliding platform 1 is integrated with the sliding rail 11 through the sliding bracket 13, and the sliding platform 1 can move along the sliding rail 11. The stop block 12 is arranged at the ship side end close to the sliding rail 11, and the sliding platform 1 stops when moving to the designated position, so that the equipment and personnel are safe. The sliding platform 1 is inside the ship side when not working. The sliding platform 1 is driven by the reciprocating double-acting sliding hydraulic cylinder 15, moves to the outside of the ship side along the sliding rail 11 installed on the ship deck 9. The operator moves to the outside of the ship side along with the sliding platform 1, and is located directly below the valve 14 at the end of the oil conveying hose. The lifting seat 2 is driven by a manual hydraulic pump, and is used for height adjustment of the valve connecting plate 3. The valve connecting plate 3 is integrated with the jacking mechanism 6, the buffer spring 4 and the locking device 5. The locking device 5 is composed of a reversible locking hook 501 and a locking bolt 502, when the valve 14 at the end of the hose is aligned with the valve connecting plate 3, the locking hook 501 is turned over, and the valve 14 at the end of the hose is fixed and sealed with the valve connecting plate 3 by the locking bolt 502.

[0044] The system can reduce the number of oil pipeline flushing equipment, reduce the intensity of personnel work, shorten the oil pipeline flushing maintenance time, can quickly, safely to the oil pipeline system flushing operation, to extend the service life of the equipment, ensure the safety of the equipment production purposes.

[0045] The flushing method of the above bow and stern unloading oil pipeline flushing system, the device is installed in the lower part of the hose winch cylinder, opposite to the shipboard inside below the hose end valve, the platform is driven by hydraulic drive to reciprocate between the inside and outside of the shipboard along the fixed track.

[0046] The flushing specifically includes the following steps: Step one, before the flushing operation, the operator enters the sliding platform 1 through the platform ladder 101 from the ship deck 9, and drives the sliding hydraulic cylinder 15 to move the manned sliding platform 1 to the outside of the shipboard, so that the valve connecting plate 3 is directly below the hose end valve 14; Step two, control the hose winch cylinder to rotate, and lower the hose end valve 14 to the valve connecting plate 3; Step three, control the lifting hydraulic cylinder by manual hydraulic pump, fine-tune the lifting seat 2 to make it rise, until the valve connecting plate 3 and the outlet port of the hose end valve 14 are in good contact; this process is prohibited to damage the contact surface of the hose end valve 14 and the valve connecting plate 3; Step four, flip six sets of locking hooks 501 to fix the valve connecting plate 3 and the hose end valve 14, rotate the locking bolts 502 in diagonal order, so that the valve connecting plate 3 and the end surface of the hose end valve 14 are tightly connected, and reach the sealing state; Step five, check whether the flow guide pipe 7 is connected well, and open the flow guide valve 8; Step six, check whether the oil receiving groove 21 and the discharge pipeline 19 are normal, and open the discharge valve 20; Step seven, control the jacking hydraulic cylinder 601 to extend by manual pump, push the jacking block 602 to rise and open the one-way valve in the hose end valve 14; Step eight, start the oil hose flushing operation, after the flushing liquid is flushed in the oil hose, it enters the flow guide pipe 7 through the hose end valve 14, and is connected to the ship body flushing system loop through the quick connector from the flow guide pipe 7; Step nine, after the oil hose flushing operation is completed, first confirm whether the inside of the oil hose is empty and pressure relief through the detection instrument and monitoring data of the oil hose; after confirming that the inside of the oil hose is empty and pressure relief, control the jacking hydraulic cylinder 601 to release pressure and retract to the inside of the valve connecting plate 3, and close the one-way valve in the hose end valve 14; Step ten, close the flow guide valve 8 first, then open the locking bolt 502 of the locking device 5, release the hose end valve 14, and clean the oil stains on the surface of the valve connecting plate 3; Step eleven, through the lifting hydraulic cylinder, the lifting seat 2 is lowered to the lowest position, the valve connecting plate 3 is separated from the hose end valve 14.

[0047] Step twelve, clean up the oil and recycle, after the oil tank 21 is emptied, the blow-off valve 20 is closed. Step thirteen, through the sliding hydraulic cylinder 15, the sliding platform 1 is driven to move to the inboard of the ship, the operator is orderly returned to the ship deck 9 by the platform ladder 101, and the flushing operation is completed.

[0048] For step nine and step ten, it should be noted that this process must strictly follow the operation steps, and the locking device 5 is prohibited to be opened before the pipeline is emptied and depressurized or the hose end valve one-way valve is closed. Operation precautions: 1. The operator should carefully study the operation procedure, and no violation of operation is allowed; 2. The operator should wear and use safety protection tools as required; 3. Before the operation starts, check whether all connection positions are sealed to ensure that there is no risk of leakage; 4. During the operation, the operation process is prohibited to be changed privately; 5. The operator is prohibited to open the locking device before the operation pipeline is emptied and depressurized; 6. The pollutants generated during the operation should be recycled and treated, and the pollutants are prohibited to be directly discharged to pollute the environment.

[0049] The present application is reasonably designed, and the oil pipeline flushing system is added to the lower part of the hose winch cylinder without affecting the functions of other equipment. The complex oil pipeline flushing process is simplified by using the device, the number of oil pipeline flushing devices is reduced, the working strength of the operator is reduced, the oil pipeline flushing and maintenance time is shortened, the oil pipeline system can be quickly and safely flushed, the production efficiency is improved, and the service life of the device is prolonged.

[0050] It should be noted that the part not described in the present application is prior art.

[0051] The above is only the best embodiment of the present application. Apparently, the present application is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or inferred by those skilled in the art from the content disclosed by the present application should be considered as the protection scope of the present application.

Claims

1. A bow-stern unloading oil pipeline flushing system, characterized in that: The system includes a sliding platform capable of sliding between the inside and outside of the ship's hull. The sliding platform is equipped with a liftable base, on which a valve connecting plate is mounted for connecting a hose end valve. The valve connecting plate and the hose end valve are locked together by multiple locking devices. The valve connecting plate is equipped with a lifting mechanism, which opens a one-way valve inside the hose end valve through its lifting action. The valve connecting plate has a flow guide port connected to a flow guide pipe, through which flushing fluid from the oil delivery hose is discharged. A flow guide valve is mounted on the flow guide pipe.

2. The bow-stern unloading oil pipeline flushing system according to claim 1, characterized in that: A sealing ring is provided on the upper surface of the valve connecting plate, and the sealing ring is located on the outer ring of the outlet channel of the valve at the end of the hose; a first threaded hole and a second threaded hole are provided on the valve connecting plate, the first threaded hole is used to connect a safety valve, and the safety valve is used to release pressure when the oil pipeline system is overloaded; the second threaded hole is used to connect monitoring instruments; multiple sets of buffer springs are provided between the valve connecting plate and the lifting seat.

3. The bow-stern unloading oil pipeline flushing system according to claim 1, characterized in that: The lifting mechanism includes a lifting hydraulic cylinder and a top block. The telescopic end of the lifting hydraulic cylinder is connected to the top block, which drives the top block to move linearly in the vertical direction. The top block is aligned with the one-way valve in the valve at the end of the hose.

4. The bow-stern unloading oil pipeline flushing system according to claim 3, characterized in that: The lifting hydraulic cylinder is fixed to the valve connecting plate and rises and falls synchronously with the valve connecting plate. The valve connecting plate has an assembly hole, and the lifting hydraulic cylinder is fixed below the assembly hole. The top block is assembled in the assembly hole. The telescopic end of the lifting hydraulic cylinder is connected to the top block and drives the top block to rise and fall. When the top block is at the bottom limit position, the upper surface of the top block is flush with the upper surface of the valve connecting plate. When the top block is at the top limit position, the check valve in the valve at the end of the hose is opened.

5. The bow-stern unloading oil pipeline flushing system according to claim 1, characterized in that: The sliding platform is equipped with a vertical lifting guide rail, and the lifting seat is set on the lifting guide rail and moves up and down along the lifting guide rail; the lifting seat is raised and lowered by hydraulic power; the sliding platform is equipped with a manual pump to control the lifting seat, and the manual pump controls the lifting hydraulic cylinder, which is connected to and controls the lifting seat.

6. The bow-stern unloading oil pipeline flushing system according to claim 1, characterized in that: The locking device includes a locking hook and a locking bolt. One end of the locking hook is hinged to the bottom of the valve connecting plate, and the other end of the locking hook is connected to the locking bolt. When the locking hook is flipped upward, the valve connecting plate and the outer edge of the port of the hose end valve are locked into the locking hole of the locking hook. By rotating the locking bolt, it is made to abut against the upper surface of the outer edge of the hose end valve, locking the valve connecting plate and the hose end valve. Multiple sets of locking devices are evenly arranged in the circumferential direction.

7. The bow-stern unloading oil pipeline flushing system according to claim 1, characterized in that: A platform base is arranged on the deck, and the connecting base plate of the sliding track is fixed to the platform base with fasteners. The sliding platform slides between the inside and outside of the ship's side along the sliding track. A stop block is provided at the end of the sliding track near the ship's side to limit the extreme position of the sliding platform's movement to the outside of the ship's side. A limit switch is provided at the end of the sliding track away from the ship's side to limit the movement position of the sliding platform during recovery. A sliding hydraulic cylinder is fixed on the deck, and the telescopic end of the sliding hydraulic cylinder is connected to the sliding platform and drives the sliding platform to slide along the sliding track. The sliding platform is equipped with a platform ladder.

8. The bow-stern unloading oil pipeline flushing system according to claim 1, characterized in that: The bottom of the skid platform is a welded platform grid. An oil collection trough is installed below the skid platform, located below the platform grid and assembled as a whole with the frame of the skid platform. The oil collection trough is located directly below the valve connecting plate and is used to collect oil and water that is left inside the scattered oil hoses or leaked during the flushing process. The oil collection trough is connected to a discharge pipeline, and the outlet of the discharge pipeline is connected to the sludge tank inside the FPSO hull. A discharge valve is installed on the discharge pipeline. The end of the diversion pipe is connected to the hull flushing system circuit.

9. A flushing method for a bow-stern unloading oil pipeline flushing system according to any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Before the flushing operation, use hydraulic drive to move the sliding platform to the outside of the ship's side, so that the valve connection plate is directly below the valve at the end of the hose; Step 2: Control the rotation of the hose winch drum to lower the hose end valve to above the valve connection plate; Step 3: Raise the lifting seat so that the valve connecting plate contacts the end face of the valve at the end of the hose; Step 4: Secure the valve connecting plate to the end valve of the hose using the locking device, ensuring a tight connection between the valve connecting plate and the end valve of the hose, achieving a sealed state. Step 5: Check that the diversion pipe is properly connected and open the diversion valve; Step 6: Open the relief valve; Step 7: Open the check valve inside the hose end valve by lifting the lifting mechanism; Step 8: Begin flushing the oil transfer hose. After flushing inside the oil transfer hose, the flushing fluid enters the diversion pipe through the valve at the end of the hose. Step 9: After the oil hose flushing operation is completed, first confirm whether the inside of the oil hose has been emptied and depressurized; after confirming that the inside of the oil hose has been emptied and depressurized, the lifting mechanism lowers and closes the one-way valve in the hose end valve; Step 10: First close the flow guide valve, then open the locking device and release the valve at the end of the hose; Step 11: Lower the lifting seat and separate the valve connecting plate from the end valve of the hose; Step 12: After the oil tank is emptied, close the drain valve; Step 13: Retrieve the sliding platform to the interior of the ship's side.

10. The flushing method for the bow-stern unloading oil pipeline flushing system according to claim 9, characterized in that, In step eight, the flushing fluid enters the hull flushing system circuit through the guide pipe; in step nine, the detection equipment of the oil hose confirms whether the inside of the oil hose is emptied and depressurized; in steps ten and eleven, after opening the locking device, the oil stains on the surface of the valve connecting plate are cleaned and recycled.

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