Automatic supporting device, system and method for seawater lifting pipeline of self-elevating platform ship

Abstract

The self-elevating platform ship seawater lifting pipeline automatic supporting device mainly comprises a base, the lower end of the base is installed on a main deck, a supporting seat is fixed to the upper end of the base, and a sliding seat is in sliding fit with the supporting seat and is driven by a hydraulic oil cylinder to move front and back; and a clamp is mounted on the sliding seat and is used for clamping and fixing the pipeline. According to the automatic supporting device, system and method for the seawater lifting pipeline of the self-elevating platform ship, the structural stability of the seawater lifting pump during working can be kept, the service life of equipment is prolonged, and the field operation risk is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of heavy component support equipment, and in particular to an automatic support device, system and method for seawater lifting pipelines of a self-elevating platform vessel. Background Technology

[0002] A self-elevating platform vessel, a special type of marine engineering equipment, can be supported on the seabed by its legs, allowing it to rise and detach from the sea surface—a state known as the "air gap state." In this state, a large gap forms between the hull and the sea surface, preventing the platform's original sea-facing doors from properly drawing in cooling seawater. To address this, the platform is equipped with a dedicated self-elevating seawater lifting system. Its core function is to bridge this air gap, continuously and reliably providing cooling water to critical equipment such as the platform's power station, propulsion system, and refrigeration system.

[0003] The core components of a self-elevating seawater lifting system mainly include: a pump body located at the bottom of the pipeline, responsible for providing suction power; pipelines (steel pipes) connecting the pump body to various water points on the platform, forming the water flow transmission channel; and a lifting mechanism consisting of wire ropes, winches, and matching pulley blocks. This lifting mechanism is not only the sole means of raising and lowering the pump body and pipeline, but also undertakes the arduous task of suspending and fixing the entire pipeline + pump body + water pressure during operation.

[0004] However, due to the operational characteristics of self-elevating platform vessels, they operate in an air gap state for most of the time. This means that the seawater lifting system and its lifting mechanism must withstand continuous operation under long-term, high-load conditions. The wire ropes are subjected to enormous suspension tension and alternating stress for extended periods, making them highly susceptible to metal fatigue, elongation deformation, and even wire breakage. The winches also operate under continuous high loads, leading to accelerated wear of transmission components and severe challenges to the braking system. This not only significantly shortens the service life of the wire ropes and winches, resulting in high maintenance costs, but more importantly, it poses a potentially significant safety hazard. If the wire rope breaks due to fatigue or overload, tens of tons of pumps and pipelines will fall into the sea, causing equipment damage, production interruption, and potentially even secondary accidents. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide an automatic support device, system and method for seawater lifting pipelines of self-elevating platform vessels. By using a rigid support structure to bear the main weight of the pipeline system, the swaying and displacement of the pipeline in the working state are limited, effectively reducing the workload of the wire rope and winch, avoiding wear and deformation caused by long-term high tension, and realizing the effective fixation of the pipeline of the seawater lifting system of the self-elevating platform vessel. This can maintain the structural stability of the seawater lifting pump during operation, extend the service life of the equipment, and effectively reduce the on-site operation risks.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: An automatic support device for seawater lifting pipelines on a self-elevating platform vessel includes a base, the lower end of which is installed on the main deck, and a support seat fixed at the upper end of the base. A sliding block is slidably engaged with the support seat and is driven to move back and forth by a hydraulic cylinder. A clamp is detachably installed on the sliding block to clamp and fix the pipeline.

[0007] The base includes first side plates arranged side by side at intervals, multiple first connecting plates fixed between the two first side plates along the length direction, multiple base ribs fixed at intervals on the outer side of the two first side plates along the length direction, and a first top plate fixed at the upper end of the first side plates, the first connecting plates, and the base ribs, with an anti-detachment guide rail arranged on the first top plate.

[0008] The support base includes a tail frame and a guide frame, which are fixedly connected. The guide frame has a guide hole, and the load-bearing shaft passes through the guide hole and slides through it.

[0009] The tailstock includes a first tail plate, a second tail plate, and a third tail plate. The first tail plate is arranged horizontally, and the second tail plate is vertically fixed at the upper end of the first tail plate and the third tail plate is vertically fixed at the lower end. The lower end of the third tail plate extends out of the guide frame and is attached and fixed to the first connecting plate.

[0010] The guide frame includes a second side plate, which is arranged in multiple groups at intervals. The two ends of the multiple groups of second side plates are connected into a whole by a second connecting plate. Multiple supporting ribs are fixed between adjacent second side plates. A second top plate is fixed at the upper end of the second side plate, the second connecting plate and the supporting ribs.

[0011] The total width of the support base is the same as the width of the two first side plates of the base, and the support base is located in the longitudinal center of the base.

[0012] The slide includes left and right slides, each slide has a third top plate fixed horizontally above and below it, and the upper and lower third top plates are reinforced by slide ribs; the tails of the two slides have through holes facing each other, and the load-bearing shaft passes through the through holes and is fixed on the slide.

[0013] The left and right sliding plates are arranged at intervals, and the spacing is greater than the diameter of the pipeline.

[0014] The clamp includes a left clamp and a right clamp, which have the same structure and are arranged in a mirror image. Both the left and right clamps include a protective plate that fits against the pipeline. One side of the protective plate is reinforced and supported by a trapezoidal frame.

[0015] A seawater lifting system for a self-elevating platform vessel includes a support device installed on the main deck; a lifting mechanism is installed on the main deck above the support device, the lifting mechanism including a winch, a wire rope, and a guide pulley, one end of the wire rope passing over the guide pulley and connected to a pipeline; the pipeline includes multiple branch pipes, each branch pipe having a clamp welded on it, a set of clamps being connected to or detached from a sliding seat on the support device; a pump body is fixed at the bottom of the pipeline.

[0016] A method for operating a seawater lifting system for a self-elevating platform vessel includes the following steps: Step 1: Under normal conditions, the jack-up platform vessel uses the DP system to reach the predetermined position, the legs are lowered to the seabed, and the main body of the jack-up platform vessel begins to rise. During this process, the seawater lifting system of the jack-up platform vessel is lifted together with the main body of the platform until the main body of the platform leaves the sea surface and is raised to the predetermined height. Step 2: When it is necessary to lower the pipeline, the personnel in charge of the pile must first remove the fixing bolts between the clamp and the slide; so that the support device is disconnected from the corresponding clamp. Step 3: Then, slightly lift the pipeline using a steel wire rope. Slightly lifting the pipeline is necessary because the entire weight of the pipeline and pump body is now resting on the slide block; only by slightly lifting the pipeline can the slide block be retracted. Control the hydraulic cylinder to retract the slide block. After confirming that the slide block is fully retracted, begin lowering the pipeline using the steel wire rope. While lowering the pipeline, observe the position of the clamps to ensure that the pump body is submerged deep enough below the sea surface to draw water while also meeting the requirements for fixing the slide block to the corresponding clamps. After confirming the position, control the hydraulic pump to extend the slide block and fix it to the clamps. Step 4: When retrieving the pipeline, the monitoring personnel first remove the fixing bolts between the slide and the clamp. The wire rope is used to slightly lift the pipeline, and the hydraulic cylinder is controlled to retract the slide. After confirming that the slide is completely retracted, the wire rope is used to lift the pipeline. When the clamp at the bottom of the pipeline is 20cm-50cm above the slide, the hydraulic cylinder is controlled to extend the slide under the clamp. Then, the wire rope is lowered down so that the clamp rests completely on the slide. The monitoring personnel then install the fixing bolts between the clamp and the slide, and the pipeline is supported and fixed by the support device to ensure stable navigation.

[0017] This invention provides an automatic support device, system, and method for seawater lifting pipelines of a self-elevating platform vessel, which has the following technical advantages: 1) The support device is a rigid support structure, which can provide stable support for the pipeline of the seawater lifting system, so that the wire rope is only used for lifting the pipeline, fundamentally reducing the risk of falling due to wire rope failure, and greatly improving the safety and stability of the seawater lifting system and even the entire platform.

[0018] 2) The support device uses a hydraulic cylinder to control the extension and retraction of the slide. The hydraulic cylinder is connected to an external hydraulic pump. After the pipeline reaches the appropriate position, it can control the slide to extend and retract automatically, which effectively improves the extension and retraction efficiency of the slide and reduces labor intensity.

[0019] 3) The support device uses a load-bearing shaft to connect the support base and the slide. Through the guide hole of the support base and the support, limit and guide of the anti-detachment guide rail on the base, the movement of the slide is realized and the high load-bearing capacity requirement of the slide is met.

[0020] 4) The clamps of the support device consist of an arc-shaped guard plate, a vertical plate, an upper support plate, and a lower support plate of a certain height, which can effectively disperse stress and provide support and protection for the pipeline.

[0021] 5) The width of the support base of the support device is the same as the width of the first left and right side plates on the base, which can ensure that the force is better transmitted to the main deck.

[0022] 6) This system is equipped with a support device to stably support the pipeline when water intake is not required; and to detach from the pipeline when it is lowered, thus integrating water intake and stable support into one system. Furthermore, multiple sets of clamps are arranged from top to bottom on the pipeline (steel pipe), which can adapt to different gaps formed between the ship's bottom and the sea surface; the clamps not only clamp but also maintain a horizontal bottom, facilitating easy lowering for support. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the support device in this invention (first view).

[0024] Figure 2 This is a schematic diagram of the support device in this invention (second perspective).

[0025] Figure 3 This is a schematic diagram of the connection structure of the base and support in this invention.

[0026] Figure 4 This is a schematic diagram of the base structure in this invention (first view).

[0027] Figure 5 This is a schematic diagram of the base structure in this invention (second view).

[0028] Figure 6 This is a schematic diagram of the support base in this invention (first view).

[0029] Figure 7 This is a schematic diagram of the support base in this invention (second view).

[0030] Figure 8 This is a schematic diagram of the support base in this invention (third-person perspective).

[0031] Figure 9 This is a schematic diagram of the slide block structure in this invention (first view).

[0032] Figure 10 This is a schematic diagram of the slide block structure in this invention (second view).

[0033] Figure 11 This is a schematic diagram of the fixture in this invention.

[0034] Figure 12 This is a schematic diagram of the overall invention.

[0035] Figure 13 for Figure 12 A partial schematic diagram.

[0036] Figure 14 This is a front view of the branch pipe in this invention.

[0037] In the diagram: Base 1, Support 2, First Connecting Seat 3, Second Connecting Seat 4, Hydraulic Cylinder 5, Slide 6, Load-bearing Shaft 7, Clamp 8, Pipeline 9, Pump Body 10, Main Deck 11, Lifting Mechanism 12, Support Device 13, Platform 14, Water Inlet 15, Cable 16, Lifting Frame 17, First Side Plate 1.1, First Connecting Plate 1.2, Base Rib 1.3, First Top Plate 1.4, Anti-detachment Guide Rail 1.5, Positioning Groove 1.6, First Tail Plate 2.1, Second Tail Plate 2.2, Third Tail Plate 2.5, etc. 2.3 Plate, 2.4 Second side plate, 2.5 Guide hole, 2.6 Second connecting plate, 2.7 Support rib, 2.8 Second top plate, 2.9 Opening hole, 6.1 Slide plate, 6.2 Third top plate, 6.3 Slide rib, 6.4 Piston rod mounting seat, 6.5 Through hole, 6.6 Third connecting plate, 8.1 Vertical plate, 8.2 Upper support plate, 8.3 Lower support plate, 8.4 Guard plate, 9.1 Branch pipe, 9.2 Guide roller, 12.1 Winch, 12.2 Wire rope, 12.3 Guide pulley. Detailed Implementation

[0038] like Figure 1-3 As shown, an automatic support device for seawater lifting pipelines on a self-elevating platform vessel is disclosed. This support device 13 is installed on the main deck at the leg of the self-elevating platform vessel. The support device 13 includes a base 1, with a support seat 2 fixed to the middle of the upper end of the base 1. First connecting seats 3 and second connecting seats 4 are installed on both sides of the base 1, and the first connecting seats 3 and second connecting seats 4 are fixed to a hydraulic cylinder 5. The hydraulic cylinder 5 drives a sliding block 6 to slide back and forth. The sliding block 6 is located on the base 1, and a load-bearing shaft 7 is installed on the sliding block 6. The load-bearing shaft 7 is inserted into and slidably engaged with the support seat 2. A clamp 8 is detachably installed above the front end of the sliding block 6 via bolts, and the clamp 8 clamps and fixes the pipeline 9.

[0039] like Figure 4-5As shown, the base 1 includes first side plates 1.1 arranged side-by-side at intervals. Multiple first connecting plates 1.2 are fixedly fixed between the two first side plates 1.1 along the length direction, and the first connecting plates 1.2 are perpendicular to the first side plates 1.1. Multiple base ribs 1.3 are fixedly fixed at intervals along the length direction on the outer sides of the two first side plates 1.1. A first top plate 1.4 is fixed to the upper end of the first side plates 1.1, the first connecting plates 1.2, and the base ribs 1.3. Anti-detachment guide rails 1.5 are arranged on the first top plate 1.4. The lower end of the base is fixed to the main deck.

[0040] The first top plate 1.4 extends a certain length beyond the first connecting plate 1.2 at its tail end. The extended portion of the first top plate 1.4 has a positioning groove 1.6, the bottom surface of which is flush with the end face of the first connecting plate 1.2.

[0041] Two first side plates 1.1 are arranged longitudinally as longitudinal load-bearing plates, and four first connecting plates 1.2 are arranged transversely as transverse load-bearing plates. The two longitudinal load-bearing plates and four transverse load-bearing plates are all steel plates arranged in an intersecting pattern. The four transverse load-bearing plates are used to distribute most of the tensile force on the support base 2. The portions of the two longitudinal load-bearing plates closer to the pipes bear the pressure, while the portions farther from the pipes bear the tension. This overall design gives the base 1 a high load-bearing capacity.

[0042] The width between the two longitudinal load-bearing plates is slightly larger than the pipe diameter. This is because the width of the two longitudinal load-bearing plates is derived from the pipe diameter. Firstly, the width of the slide 6 must be slightly larger than the pipe diameter. The width of the support 2 is determined by the width of the slide 6. Finally, the width of the support 2 matches that of the two longitudinal load-bearing plates to ensure better force transmission. The width of the base rib 1.3 is slightly larger than the width of one side of the slide 6 to bear most of the pressure from the slide 6. The first top plate 1.4 facilitates the connection between the base 1 and the support 2.

[0043] To solve the problem of welding the base 1 to the main deck, a welding method from the inside out is adopted: the first connecting plate 1.2 is welded to the main deck on site. During welding, the two inner first connecting plates 1.2 are welded first, and the weld is treated with anti-corrosion; then the two outer first connecting plates 1.2 are welded.

[0044] The support base 2 includes a tail frame and a guide frame, which are fixedly connected.

[0045] like Figure 6-7As shown, the tailstock consists of a first tail plate 2.1, a second tail plate 2.2, and a third tail plate 2.3. The first tail plate 2.1 is arranged horizontally as a set. The second tail plates 2.2 are arranged in two sets above the first tail plate 2.1 and perpendicular to it. The third tail plates 2.3 are arranged in two sets below the first tail plate 2.1 and perpendicular to it. One side of the tailstock is fixedly connected to the guide frame, and the portion of the third tail plate 2.3 extending beyond the guide frame engages with the positioning groove 1.6 and is fixedly attached to the first connecting plate 1.2.

[0046] The guide frame includes second side plates 2.4, which are arranged in multiple groups side-by-side at intervals. Each group of second side plates 2.4 has a guide hole 2.5 along its length, with the guide holes 2.5 facing each other. The two ends of each group of second side plates 2.4 are connected by second connecting plates 2.6, which are perpendicular to the second side plates 2.4. Multiple supporting ribs 2.7 are fixed between adjacent second side plates 2.4, positioned above and below the guide holes 2.5. The tops of the second side plates 2.4, the upper supporting ribs 2.7, and the front and rear second connecting plates 2.6 are all connected to a second top plate 2.8.

[0047] The guide frame is fixed on the first top plate 1.4 with a certain amount of space reserved on the left and right sides.

[0048] The first tail plate 2.1 has first connecting seats 3 fixed at both ends, and the corresponding first top plate 1.4 has second connecting seats 4 fixed on the left and right outer sides. The hydraulic cylinder 5 has its two ends fixed on the first connecting seats 3 and the second connecting seats 4. The piston rod output end of the hydraulic cylinder 5 is connected to the slide 6, and the slide 6 is in sliding engagement with the guide frame.

[0049] By using four second side plates 2.4 as longitudinal load-bearing plates, the four longitudinal load-bearing plates are arranged at equal intervals, and the second connecting plate 2.6 and the support rib plate 2.7 are used as transverse connecting parts to fix the four sets of longitudinal load-bearing plates, thus solving the longitudinal load-bearing problem of the support base.

[0050] The total width of the support base 2 is the same as the width of the two longitudinal load-bearing plates of the base 1; and during welding, the support base 2 is positioned longitudinally in the center of the base 1. The advantage is that it can ensure better force transmission.

[0051] like Figure 3 As shown, in order to solve the welding problem between the support 2 and the base 1, open holes 2.9 are made at the top and tail of the support 2 to facilitate the welding gun to reach the welding position during welding.

[0052] The size of the opening 2.9 ensures both smooth welding of the four longitudinal load-bearing plates and aesthetic appeal. The first part of the second side plate 2.4 is rounded, with a radius equal to half the height of the second side plate 2.4, further facilitating welding operations.

[0053] like Figure 9-10 As shown, the slide block 6 includes left and right sliding plates 6.1. Each sliding plate 6.1 is horizontally fixed with a third top plate 6.2 at its top and bottom, and the upper and lower third top plates 6.2 are reinforced by a slide block rib 6.3. A piston rod mounting seat 6.4 is fixed to the outside of each sliding plate 6.1, and the piston rod mounting seat 6.4 is connected to the piston rod of the hydraulic cylinder 5. Through holes 6.5 are opened at the tail of the two sliding plates 6.1, and the load-bearing shaft 7 passes through the through holes 6.5 and is fixed by an end plate. The upper ends of the left and right sliding plates 6.1 are fixed by a third connecting plate 6.6.

[0054] By using a load-bearing shaft 7 to connect the support base 2 and the slide 6, the load-bearing shaft 7 passes through the through hole 6.5 and is fixed on the slide 6, enabling the slide 6 to extend and retract while also having high load-bearing capacity. During normal extension and retraction, the slide 6 is supported by the base 1. When the slide 6 supports the pipe 9, the base 1 and the support base 2 together restrict the slide 6, ensuring smooth extension and retraction while maintaining a tight fit.

[0055] The slide 6 is fitted onto the outside of the guide frame and is guided and limited on both sides by anti-detachment guide rails 1.5. The load-bearing shaft 7 passes through the guide hole 2.5 to achieve secondary guidance and ensure reliable connection, preventing the slide 6 from detaching from the guide frame.

[0056] like Figure 11 As shown, a clamp 8 is installed on the upper end of the slide 6, and the clamp 8 clamps and fixes the pipe 9. The clamp 8 includes a left clamp and a right clamp, which have the same structure and are arranged in a mirror image. Both the left clamp and the right clamp include a vertical plate 8.1, and an upper support plate 8.2 and a lower support plate 8.3 are fixed to the upper and lower parts of the vertical plate 8.1, respectively. A protective plate 8.4 is fixed to one side of the upper support plate 8.2, the lower support plate 8.3, and the vertical plate 8.1.

[0057] The clamp uses a trapezoidal support of a certain height, consisting of an upper support plate 8.2, a lower support plate 8.3, and two vertical plates 8.1 with a spacing slightly smaller than the diameter of the pipe 9, which support the pipe and distribute stress. The protective plate 8.4 fits against the outer wall of the pipe 9, increasing the contact area and reducing the pressure of the clamp on the pipe 9.

[0058] like Figure 12-14As shown, the seawater lifting system of the self-elevating platform vessel includes a pipeline 9, which comprises multiple branch pipes 9.1, each approximately 6 meters long. Adjacent branch pipes 9.1 are connected as a whole by flanges. Clamps 8 are welded onto each branch pipe 9.1 to accommodate different air gap heights. Two sets of guide rollers 9.2 are arranged symmetrically along the length of each branch pipe 9.1. The guide rollers 9.2 cooperate with guide rods, which are fixed to the platform 14, ensuring stable vertical movement of the pipeline 9. A water inlet 15 is installed on each branch pipe 9.1 for easy connection to other pipelines, which then connect to equipment on the self-elevating platform vessel for water supply.

[0059] like Figure 12-14 As shown, a pump body 10 is fixedly connected to the bottom of pipe 9. The pump body 10 and pipe 9 together weigh tens of tons. A lifting mechanism 12 is installed on the main deck 11. The lifting mechanism 12 includes a winch 12.1, a wire rope 12.2, and a guide pulley 12.3. One end of the wire rope 12.2 passes over the guide pulley 12.3 and connects to pipe 9.

[0060] The method for operating the seawater lifting system of a self-elevating platform vessel includes the following steps: Step 1: Under normal conditions, the jack-up platform vessel uses the DP system to reach the predetermined position, lowers the legs to the seabed, and the main body of the platform begins to rise. During this process, the seawater lifting system of the jack-up platform vessel rises together with the main body of the platform until the main body of the platform leaves the sea surface and is raised to the predetermined height.

[0061] Step 2: When it is necessary to lower the pipeline 9, the pile watcher must first remove the fixing bolts between the clamp 8 and the slide 6 to disengage the support device from the corresponding clamp 8.

[0062] Step 3: Then, slightly lift pipe 9 with a steel wire rope. Slightly lifting pipe 9 is necessary because the entire weight of pipe 9 and pump body is now on slide 6. Only by slightly lifting pipe 9 can slide 6 be retracted. Control hydraulic cylinder 5 to retract slide 6. After confirming that slide 6 is fully retracted, start lowering pipe 9 with the steel wire rope. While lowering pipe 9, observe the position of clamp 8 to ensure that pump body 10 is submerged deep enough below the sea surface to draw water while also meeting the requirements for fixing slide 6 and corresponding clamp 8. After confirming the position, control hydraulic pump 5 to extend slide 6 and fix slide 6 to clamp 8.

[0063] Step 4: When retrieving pipeline 9, the monitoring personnel first remove the fixing bolts between slide 6 and clamp 8. The wire rope slightly lifts pipeline 9, and the hydraulic cylinder 5 is controlled to retract slide 6. After confirming that slide 6 is completely retracted, the wire rope lifts pipeline 9. When the clamp 8 at the bottom of pipeline 9 is 20cm-50cm above slide 6, the hydraulic cylinder 5 is controlled to extend slide 6 below clamp 8. Then, the wire rope is lowered down to allow clamp 8 to fall completely onto slide 6. The monitoring personnel then install the fixing bolts between clamp 8 and slide 6 to ensure the stability of navigation.

Claims

1. An automatic support device for seawater lifting pipelines of a self-elevating platform vessel, characterized in that: Includes a base (1), the lower end of which is installed on the main deck, and a support seat (2) is fixed on the upper end of the base (1). The slide (6) slides and the support seat (2) together and is driven to move back and forth by a hydraulic cylinder (5). A clamp (8) is detachably installed on the slide (6) and clamps and fixes the pipeline (9).

2. The automatic support device for seawater lifting pipeline of a self-elevating platform vessel according to claim 1, characterized in that: The base (1) includes first side plates (1.1) arranged side by side with intervals. Multiple first connecting plates (1.2) are fixed between the two first side plates (1.1) along the length direction. Multiple base ribs (1.3) are fixed on the outer side of the two first side plates (1.1) along the length direction. A first top plate (1.4) is fixed on the upper end of the first side plates (1.1), the first connecting plates (1.2), and the base ribs (1.3). An anti-detachment guide rail (1.5) is arranged on the first top plate (1.4).

3. The automatic support device for seawater lifting pipeline of a self-elevating platform vessel according to claim 2, characterized in that: The total width of the support base (2) is the same as the width of the two first side plates (1.1) of the base (1), and the support base (2) is located in the longitudinal center of the base (1).

4. The automatic support device for seawater lifting pipeline of a self-elevating platform vessel according to claim 3, characterized in that: The support base (2) includes a tail frame and a guide frame. The tail frame and the guide frame are fixedly connected. The guide frame has a guide hole (2.5). The load-bearing shaft (7) passes through the guide hole (2.5) and slides with the guide hole (2.5).

5. The automatic support device for seawater lifting pipeline of a self-elevating platform vessel according to claim 4, characterized in that: The tail frame includes a first tail plate (2.1), a second tail plate (2.2), and a third tail plate (2.3). The first tail plate (2.1) is arranged horizontally. The second tail plate (2.2) is vertically fixed at the upper end of the first tail plate (2.1), and the third tail plate (2.3) is vertically fixed at the lower end. The lower end of the third tail plate (2.3) extends out of the guide frame and is attached and fixed to the first connecting plate (1.2).

6. The automatic support device for seawater lifting pipeline of a self-elevating platform vessel according to claim 5, characterized in that: The guide frame includes a second side plate (2.4), which is arranged in multiple groups at intervals. The two ends of the multiple groups of second side plates (2.4) are connected into a whole by a second connecting plate (2.6). Multiple supporting ribs (2.7) are fixed between adjacent second side plates (2.4). A second top plate (2.8) is fixed at the upper end of the second side plate (2.4), the second connecting plate (2.6) and the supporting ribs (2.7).

7. The automatic support device for seawater lifting pipeline of a self-elevating platform vessel according to claim 1, characterized in that: The slide (6) includes left and right slide plates (6.1), which are spaced apart and the distance between them is greater than the diameter of the pipe (9); each slide plate (6.1) is horizontally fixed with a third top plate (6.2) at the top and bottom, and the upper and lower third top plates (6.2) are reinforced by slide ribs (6.3); the tails of the two slide plates (6.1) have through holes (6.5) facing each other, and the load-bearing shaft (7) passes through the through holes (6.5) and is fixed on the slide plate (6.1).

8. The automatic support device for seawater lifting pipeline of a self-elevating platform vessel according to claim 1, characterized in that: The clamp (8) includes a left clamp and a right clamp. The left clamp and the right clamp have the same structure and are arranged in a mirror image. Both the left clamp and the right clamp include a guard plate (8.4). The guard plate (8.4) is attached to the pipeline (9). One side of the guard plate (8.4) is reinforced and supported by a trapezoidal frame.

9. A seawater lifting system for a self-elevating platform vessel, characterized in that: The device includes the support device described in any one of claims 1-8, which is installed on the main deck; a lifting mechanism (12) is installed on the main deck above the support device, the lifting mechanism (12) includes a winch (12.1), a wire rope (12.2), and a guide pulley (12.3), one end of the wire rope (12.2) passes over the guide pulley (12.3) and is connected to the pipeline (9); the pipeline (9) includes multiple branch pipes (9.1), each branch pipe (9.1) is welded with a clamp (8), a set of clamps (8) is connected to or disconnected from the slide (6) on the support device; a pump body (10) is fixed at the bottom of the pipeline (9).

10. A method for operating a seawater lifting system for a self-elevating platform vessel according to claim 9, characterized in that, Includes the following steps: Step 1: Under normal conditions, the jack-up platform vessel uses the DP system to reach the predetermined position, the legs are lowered to the seabed, and the main body of the jack-up platform vessel begins to rise. During this process, the seawater lifting system of the jack-up platform vessel is lifted together with the main body of the platform until the main body of the platform leaves the sea surface and is raised to the predetermined height. Step 2: When it is necessary to lower the pipeline (9), the pile watcher must first remove the fixing bolts between the clamp (8) and the slide (6) to disconnect the support device from the corresponding clamp (8); Step 3: Then, slightly lift the pipe (9) with a wire rope. The reason for slightly lifting the pipe (9) is that at this time, the weight of the entire pipe (9) and the pump body is on the slide (6). Only by slightly lifting the pipe (9) can the slide (6) be retracted. Control the hydraulic cylinder (5) to retract the slide (6). After confirming that the slide (6) is completely retracted, start lowering the pipe (9) with the wire rope. While lowering the pipe (9), observe the position of the clamp (8) to ensure that the pump body (10) is submerged deep enough below the sea surface to absorb water while also meeting the requirements for fixing the slide (6) and the corresponding clamp (8). After confirming the position, control the hydraulic pump (5) to extend the slide (6) and fix the slide (6) to the clamp (8). Step 4: When the pipeline (9) is being retrieved, the personnel in charge of the pile first remove the fixing bolts between the slide (6) and the clamp (8), lift the pipeline (9) slightly with the wire rope, and control the hydraulic cylinder (5) to retract the slide (6). After confirming that the slide (6) is completely retracted, lift the pipeline (9) with the wire rope. When the clamp (8) at the bottom of the pipeline (9) is 20cm-50cm above the slide (6), control the hydraulic cylinder (5) to extend the slide (6) to below the clamp (8), and then lower the pipeline (9) with the wire rope so that the clamp (8) falls completely on the slide (6). The personnel in charge of the pile then install the fixing bolts between the clamp (8) and the slide (6) so that the pipeline (9) is supported and fixed by the support device to ensure stable navigation.

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