Compact seawater manifold for a ship and mounting structure

Abstract

The utility model provides a kind of marine compact seawater main pipe and mounting structure, seawater main pipe includes low seawater tank and high seawater tank;The bottom of low seawater tank and high seawater tank is all provided with access hole, access hole is equipped with grating;Multiple through slots are set on grating at equal intervals;Seawater structure cabin is arranged between low seawater tank and high seawater tank;Left suction assembly and right suction assembly are respectively communicated on the two sides of seawater structure cabin;Scrubbing portion is equipped in low seawater tank and high seawater tank, and scrubbing portion is provided with multiple blowoff ports;Scrubbing portion is connected with turnover position adjusting part, and turnover position adjusting part is used to drive scrubbing portion to switch in horizontal and vertical two states;When scrubbing portion is in horizontal state, blowoff port is directly opposite through slot top portion.It replaces seawater total assembly with seawater structure cabin, reduces the usage amount of copper-nickel alloy pipe, substantially reduces material cost, simultaneously releases machine cabin upper space, solves the problem of dense pipeline arrangement in narrow machine cabin.

Description

Technical Field

[0001] This utility model relates to the field of marine equipment technology, and in particular to a compact marine seawater main and its installation structure. Background Technology

[0002] The ship's seawater main pipe is the core pipeline of the seawater cooling system's intake section, responsible for providing water for cooling, fire fighting, ballast, and desalination for the entire ship. It is typically located above the double bottom of the engine room and spans the port and starboard sides of the engine room.

[0003] In existing technologies, seawater mains are mostly made of a single section of copper-nickel alloy pipe, which is expensive in terms of materials and processing. At the same time, the anti-submersion pipes in the engine room are interspersed with the seawater mains, which takes up a lot of space. For high-speed special vessels with small engine rooms, the layout is extremely limited, and other performance aspects of the vessel may even need to be sacrificed to meet the installation requirements.

[0004] Therefore, a compact marine seawater main and its installation structure are provided to address the above problems. Utility Model Content

[0005] This utility model provides a compact marine seawater main and its installation structure to solve the technical problem of large space occupation in seawater mains.

[0006] This utility model solves the above-mentioned technical problems through the following technical solutions: This utility model provides a compact seawater main pipe for ships, which is installed inside the forewall of the double-bottom engine room. The seawater main pipe includes a low-level seawater tank and a high-level seawater tank. The low-level seawater tank and the high-level seawater tank are fixedly installed on the port side and starboard side of the ship, respectively. Inspection holes are provided at the bottom of both the low-level and high-level seawater tanks, and gratings are fixedly installed at the inspection holes. Multiple through slots are evenly spaced on the gratings. A seawater structure chamber is provided between the low-level and high-level seawater tanks. A port suction assembly and a starboard suction assembly are respectively connected to both sides of the seawater structure chamber. A purging unit is provided inside both the low-level and high-level seawater tanks, and the purging unit has multiple purging ports. The purging unit is connected to a tilting and adjusting unit, which drives the purging unit to switch between horizontal and vertical states. When the purging unit is in the horizontal state, the purging ports face the top of the through slots.

[0007] Preferably, the walls of the seawater structural tank are coated with an anti-corrosion buffer layer, and a sacrificial anode group is fixedly arranged inside the seawater structural tank.

[0008] Preferably, the left intake assembly includes a left sea valve fixedly installed at the top of the low-level seawater tank, the left sea valve is fixedly connected to a left seawater filter, the left seawater filter is fixedly connected to a first flange butterfly valve, and the first flange butterfly valve is fixedly connected to one side of the seawater structure chamber.

[0009] Preferably, the right intake assembly includes a right sea valve fixedly installed on one side of the elevated seawater tank; the right sea valve is fixedly connected to a right seawater filter, the right seawater filter is fixedly connected to a second flange butterfly valve, and the second flange butterfly valve is fixedly connected to one side of the seawater structure chamber.

[0010] Preferably, the purging section includes a diverter pipe; a plurality of outlet ends are provided on one side of the diverter pipe, and each of the plurality of outlet ends is fixedly connected to a purging strip cover; a plurality of purging ports are respectively opened at the bottom of the plurality of purging strip covers; an inlet end is provided on the side of the diverter pipe away from the outlet end, and the inlet end is fixedly connected to a connecting pipe; the connecting pipe is connected to the flip-adjustment section.

[0011] Preferably, the flip-adjustment unit includes a motor, the output shaft of which is fixedly connected to a rotating shaft, and the rotating shaft is fixed to a fixed seat fixed on the connecting pipe; there are two flip-adjustment units, the motors of the two flip-adjustment units are respectively fixed on the outer wall of the high-level seawater tank and the outer wall of the low-level seawater tank, and the rotating shafts of the two flip-adjustment units are respectively rotatably installed inside the high-level seawater tank and the low-level seawater tank.

[0012] Preferably, the system also includes two lifting pipes, which are respectively installed on the low-level seawater tank and the high-level seawater tank.

[0013] Preferably, the lifting pipe includes an inlet pipe connected to the ship's air compressor pump; the inlet pipes of the two lifting pipes are respectively fixedly installed on the top of the low-level seawater tank and the high-level seawater tank via a fixing bracket; a corrugated telescopic hose is fixedly connected to the bottom of the inlet pipe; a movable pipe is fixedly connected to the bottom end of the corrugated telescopic hose; a movable bracket is fixedly attached to the movable pipe; telescopic components are fixed to the outer walls of both the low-level and high-level seawater tanks; the output end of the telescopic component is fixed to the movable bracket; a hole is opened on the top of both the low-level and high-level seawater tanks; a sealing ring is fixedly attached to the hole; the movable pipe passes through the hole; a bottom pipe is fixedly connected to the bottom end of the movable pipe; an insertion pipe is fixedly connected to the bottom end of the bottom pipe; a cover is fixedly fitted onto the insertion pipe; and a sealing gasket is fixedly attached to the bottom of the cover.

[0014] Preferably, when the purging section is in a horizontal state, the insertion tube of the lifting pipe is aligned with the end of the connecting tube of the purging section away from the diversion tube.

[0015] This utility model also provides an installation structure for a seawater main pipe, including the seawater main pipe as described in the above technical solution and a connecting seat fixedly installed on the seawater structure chamber; the connecting seat is fixed with an installation plate, and the installation plate is provided with installation holes.

[0016] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0017] The positive and progressive effects of this utility model are as follows: The aforementioned proposed compact seawater main pipe and installation structure for ships replaces the seawater assembly with a seawater structural compartment, reducing the amount of copper-nickel alloy pipes used and significantly lowering material costs. At the same time, it frees up upper engine room space and solves the problem of dense pipe layout in a small engine room.

[0018] By covering the structure with an anti-corrosion buffer layer and combining it with sacrificial anode groups, double protection is provided, which can extend the service life of the seawater structural tank, thereby significantly reducing the frequency of return to dry dock for repairs and reducing maintenance costs.

[0019] By setting up a purging section, the bar screen can be cleaned by purging, preventing the bar screen from clogging and affecting seawater intake. Furthermore, by setting up a flip-adjustment section, the purging section can be switched between horizontal and vertical states. When purging is required, the purging section is adjusted to horizontal, and the purging port on the purging section is aligned with and close to the through groove of the bar screen to ensure the purging cleaning effect. After cleaning, the purging section is adjusted to vertical, so that the purging section does not block or obstruct the bar screen, thereby avoiding affecting seawater intake. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the first and second protective covers of this utility model; Figure 3 This is a schematic diagram of the top of the lifting pipe component and the motor of this utility model; Figure 4 This is a schematic diagram of the structure of the grille of this utility model; Figure 5 This is a structural schematic diagram of the lifting pipe fitting of this utility model; Figure 6 This is a schematic diagram of the structure of the lifting pipe fitting and the horizontal blowing section of this utility model; Figure 7 This utility model Figure 6 Enlarged structural diagram of section A in the middle; Figure 8 This is a schematic diagram of the lifting pipe and the vertically positioned purging section of this utility model. Figure 9This is a schematic diagram of the structure of the blowing part and the grid of this utility model; Figure 10 This is a schematic diagram of the structure of the purge bar cover and purge port of this utility model; Figure 11 This is a schematic diagram of the installation structure of this utility model.

[0021] Explanation of reference numerals in the attached figures 1. Port side of the vessel; 2. Starboard side of the vessel; 3. Seawater structure compartment; 4. Low-level seawater tank; 5. High-level seawater tank; 6. Port seawater filter; 7. Port sea-through valve; 8. First flanged butterfly valve; 9. Starboard seawater filter; 10. Starboard sea-through valve; 11. Second flanged butterfly valve; 12. Sacrificial anode assembly; 13. First protective cover; 14. Lifting pipe fittings; 1401. Movable pipe; 1402. Corrugated telescopic hose; 1403. Inlet pipe; 1404. Fixing frame; 1405. 1406. Movable frame; 1407. Telescopic component; 1408. Bottom tube; 1409. Insert tube; 1410. Cover; 1410. Sealing gasket; 15. Second protective cover; 16. Motor; 17. Grille; 1701. Through groove; 18. Sealing ring; 19. Purge section; 1901. Purge strip cover; 19011. Purge port; 1902. Diverter pipe; 1903. Connecting pipe; 1904. Fixed base; 1905. Rotating shaft; 20. Connecting base; 21. Mounting plate; 22. Mounting hole. Detailed Implementation

[0022] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0023] like Figures 1-11 As shown, a compact seawater main pipe for ships is installed inside the forewall of the double-bottom engine room; the seawater main pipe includes a low-level seawater tank 4 and a high-level seawater tank 5; the low-level seawater tank 4 and the high-level seawater tank 5 are respectively fixedly installed at the port side 1 and the starboard side 2 of the ship. Both the bottom of the low-level seawater tank 4 and the high-level seawater tank 5 are provided with inspection holes, and a grid 17 is fixedly installed at the inspection hole; multiple through slots 1701 are provided at equal intervals on the grid 17. A seawater structure chamber 3 is provided between the low-level seawater tank 4 and the high-level seawater tank 5; the left suction assembly and the right suction assembly are respectively connected to the two sides of the seawater structure chamber 3. Both the low-level seawater tank 4 and the high-level seawater tank 5 are equipped with a purging unit 19, and the purging unit 19 is provided with multiple purging ports 19011. The blowing unit 19 is connected to a flip-adjustment unit, which is used to drive the blowing unit 19 to switch between horizontal and vertical states. When the purging section 19 is in a horizontal state, the purging port 19011 is directly opposite the top of the through groove 1701.

[0024] This seawater main pipe reduces the amount of copper-nickel alloy pipes used by replacing the seawater main assembly with the seawater structural compartment 3. It uses only a few galvanized carbon steel flanged short pipes to connect the left and right intake components to the seawater structural compartment 3, which greatly reduces material costs. At the same time, it frees up upper engine room space and solves the problem of dense piping in a small engine room.

[0025] like Figure 1 As shown, the walls of the seawater structure tank 3 are coated with an anti-corrosion buffer layer, and sacrificial anode groups 12 are fixedly arranged inside the seawater structure tank 3. The anti-corrosion buffer layer is made of wear-resistant and anti-corrosion paint.

[0026] By employing a dual protection system of wear-resistant and anti-corrosion paint and sacrificial anode group 12, the service life of the hull is extended, the frequency of return to dock for repairs is significantly reduced, and maintenance costs are lowered.

[0027] The wear-resistant and anti-corrosion paint is a 12% aluminum powder epoxy paint, and the sacrificial anode group 12 is a zinc-aluminum-cadmium alloy anode. The sacrificial anode group 12 consists of sacrificial anodes with uniform density arranged on the inner wall of the seawater structure tank 3.

[0028] like Figure 1 As shown, the left intake assembly includes a left sea valve 7 fixedly installed at the top of the low-level seawater tank 4. The left sea valve 7 is fixedly connected to a left seawater filter 6. The left seawater filter 6 is fixedly connected to a first flange butterfly valve 8, and the first flange butterfly valve 8 is fixedly connected to one side of the seawater structure chamber 3.

[0029] The first flanged butterfly valve 8 is connected to the seawater structure compartment 3 via a galvanized carbon steel flange short pipe; the left-hand sea valve 7 is also connected to the low-level seawater tank 4 via a galvanized carbon steel flange short pipe.

[0030] like Figure 1 As shown, the right suction assembly includes a right sea valve 10 fixedly installed on one side of the high-level seawater tank 5; the right sea valve 10 is fixedly connected to a right seawater filter 9, the right seawater filter 9 is fixedly connected to a second flange butterfly valve 11, and the second flange butterfly valve 11 is fixedly connected to one side of the seawater structure chamber 3.

[0031] The second flanged butterfly valve 11 is connected to the seawater structure compartment 3 via a galvanized carbon steel flange short pipe; the right-hand sea valve 10 is also connected to the high-level seawater tank 5 via a galvanized carbon steel flange short pipe.

[0032] Both the left-hand sea valve 7 and the right-hand sea valve 10 are locally hydraulically operated butterfly valves. The left-hand seawater filter 6 and the right-hand seawater filter 9 are self-cleaning coarse water filters, and their drain outlets are connected to the ship's sewage collection system.

[0033] like Figures 6-10 As shown, the purging unit 19 includes a diverter pipe 1902; a plurality of outlet ends are provided on one side of the diverter pipe 1902, and each of the plurality of outlet ends is fixedly connected to a purging strip cover 1901; a plurality of purging ports 19011 are respectively opened at the bottom of the plurality of purging strip covers 1901; an inlet end is provided on the side of the diverter pipe 1902 away from the outlet end, and the inlet end is fixedly connected to a connecting pipe 1903; the connecting pipe 1903 is connected to the flip-adjustment unit.

[0034] like Figure 3 , Figure 6 , Figure 7 as well as Figure 9 As shown, the tilting and adjusting unit includes a motor 16, which is a worm gear motor 16; the output shaft of the motor 16 is fixedly connected to a rotating shaft 1905, and the rotating shaft 1905 is fixed to a fixing seat 1904 fixed on the connecting pipe 1903; there are two tilting and adjusting units, and the motors 16 of the two tilting and adjusting units are respectively fixed on the outer wall of the high-level seawater tank 5 and the outer wall of the low-level seawater tank 4, and the rotating shafts 1905 of the two tilting and adjusting units are respectively rotatably installed inside the high-level seawater tank 5 and the low-level seawater tank 4.

[0035] The motor 16 is covered by a first protective cover 13. The first protective cover 13 is fixed to the outer wall of the low-level seawater tank 4 and the high-level seawater tank 5, and the first protective cover 13 provides closed protection for the motor 16.

[0036] By setting up the purging section 19, debris in the upper channel 1701 of the grille 17 can be blown out, preventing the grille 17 from becoming clogged and affecting seawater intake.

[0037] When cleaning of the grille 17 is required, the motor 16 drives the rotating shaft 1905 to rotate, and the rotating shaft 1905 drives the entire blowing section 19 to rotate, thus adjusting the blowing section 19 to a horizontal position. Figure 6 and Figure 9 As shown, the multiple purging ports 19011 of the purging section 19 are aligned with the multiple through slots 1701 of the grille 17; the airflow purged from the purging ports 19011 can blow away the blockages in the through slots 1701.

[0038] After the grille 17 is cleaned, the motor 16 drives the rotating shaft 1905 and the blowing unit 19 to rotate together, adjusting the blowing unit 19 to a vertical position. Figure 8 As shown, the purging section 19 exits from the top of the grille 17 to avoid obstructing the flow of seawater at the channel 1701.

[0039] like Figure 3 , Figure 5 , Figure 6 as well as Figure 7As shown, it also includes two lifting pipe components 14, which are respectively installed on the low-level seawater tank 4 and the high-level seawater tank 5.

[0040] The lifting pipe fitting 14 includes an inlet pipe 1403 connected to the ship's air compressor pump; the inlet pipes 1403 of the two lifting pipe fittings 14 are respectively fixedly installed on the top of the low-level seawater tank 4 and the high-level seawater tank 5 via fixing brackets 1404. A corrugated telescopic hose 1402 is fixedly connected to the bottom of the inlet pipe 1403, and a movable pipe 1401 is fixedly connected to the bottom end of the corrugated telescopic hose 1402. A movable bracket 1405 is fixed on the movable pipe 1401. The outer walls of the low-level seawater tank 4 and the high-level seawater tank 5 are both A telescopic component 1406 is fixedly provided. The output end of the telescopic component 1406 is fixed to the movable frame 1405. The top of the low-level seawater tank 4 and the high-level seawater tank 5 are both provided with holes, and a sealing ring 18 is fixed inside the hole. The movable tube 1401 passes through the hole, and the bottom end of the movable tube 1401 is fixedly connected to the bottom tube 1407. The bottom end of the bottom tube 1407 is fixedly connected to the insertion tube 1408. A cover 1409 is fixedly sleeved on the insertion tube 1408, and a sealing gasket 1410 is fixedly fixed at the bottom of the cover 1409.

[0041] The telescopic component 1406 is made of a cylinder, an electric push rod, or a hydraulic cylinder.

[0042] Both the low-level seawater tank 4 and the high-level seawater tank 5 are fixed with second protective covers 15. The top end of the movable pipe 1401, the corrugated telescopic hose 1402, the inlet pipe 1403, the fixed frame 1404, the movable frame 1405, and the telescopic component 1406 are all located inside the second protective cover 15. The top end of the inlet pipe 1403 extends from the top of the second protective cover 15 and is connected to the ship's air compressor pump through an external pipe. The second protective cover 15 is used to enclose and protect its internal structure.

[0043] like Figure 6 As shown, when the purging section 19 is in a horizontal state, the insertion tube 1408 of the lifting tube 14 is aligned with the end of the connecting tube 1903 of the purging section 19 away from the diversion tube 1902.

[0044] A lifting pipe fitting 14 is used to accommodate the tilting of the purging unit 19. The telescopic component 1406 extends and retracts, causing the movable pipe 1401 and its bottom structure to move up and down together for adjustment. During the lifting and lowering of the movable pipe 1401, the corrugated telescopic hose 1402 is stretched or compressed. The extension and retraction of the corrugated telescopic hose 1402 does not affect the lifting and lowering adjustment of the movable pipe 1401. Before and after the lifting and lowering adjustment, the movable pipe 1401 remains connected to the ship's air compressor pump through the corrugated telescopic hose 1402, the inlet pipe 1403, and external pipes. The corrugated telescopic hose 1402 is made of rubber.

[0045] When the purging section 19 is in a horizontal position and the movable pipe 1401 is lowered to a low position, the insertion pipe 1408 is inserted into one end of the connecting pipe 1903, and the sealing gasket 1410 presses against the end face of the connecting pipe 1903, so that the lifting pipe fitting 14 is connected to the purging section 19. The high-pressure airflow blown out by the ship's air compressor pump enters the connecting pipe 1903 through the inlet pipe 1403, the corrugated telescopic hose 1402, the movable pipe 1401, the bottom pipe 1407, and the insertion pipe 1408 in sequence. Then the airflow enters the purging strip cover 1901 through the connecting pipe 1903 and the diversion pipe 1902 in sequence, and finally blows out from the purging port 19011 at the bottom of the purging strip cover 1901, blowing out the blockage in the through groove 1701 and achieving cleaning.

[0046] After cleaning, raise the movable tube 1401 to the high position, disengage the insertion tube 1408 from the connecting tube 1903, and rotate the tilting and adjusting part to adjust the blowing part 19 to vertical position.

[0047] When cleaning is required again, adjust the blowing part 19 to be horizontal, align the end of the connecting tube 1903 with the insertion tube 1408, lower the movable tube 1401 to the low position, insert the insertion tube 1408 into one end of the connecting tube 1903, press the sealing gasket 1410 against the end face of the connecting tube 1903, and establish a connection between the insertion tube 1408 and the connecting tube 1903.

[0048] like Figure 11 As shown, an installation structure for a seawater main pipe includes a seawater main pipe and a connecting seat 20 fixedly installed on a seawater structure 3; the connecting seat 20 is fixed with an installation plate 21, and the installation plate 21 is provided with an installation hole 22.

[0049] The seawater main pipe is installed through the installation structure; the installation hole 22 provides the installation hole 22 positions, and the installation plate 21 is fixed to the ship by bolts to realize the fixed installation of the seawater main pipe.

[0050] This utility model is not limited to the above-described embodiments. Any changes made to its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A compact seawater main pipe for ships, characterized in that: The seawater main pipe is located inside the front wall of the double-bottom engine room of the ship; the seawater main pipe includes a low-level seawater tank (4) and a high-level seawater tank (5); the low-level seawater tank (4) and the high-level seawater tank (5) are respectively fixedly installed at the port side (1) and the starboard side (2) of the ship. Both the low-level seawater tank (4) and the high-level seawater tank (5) have inspection holes at their bottoms, and a grid (17) is fixedly installed at the inspection hole; multiple through slots (1701) are provided at equal intervals on the grid (17). A seawater structure chamber (3) is provided between the low-level seawater tank (4) and the high-level seawater tank (5); the left suction assembly and the right suction assembly are respectively connected to both sides of the seawater structure chamber (3); Both the low-level seawater tank (4) and the high-level seawater tank (5) are equipped with a purging section (19), and the purging section (19) is provided with multiple purging ports (19011). The blowing unit (19) is connected to a flip-adjustment unit, which is used to drive the blowing unit (19) to switch between horizontal and vertical states; When the purging section (19) is in a horizontal state, the purging port (19011) is directly opposite the top of the through groove (1701).

2. The ship-mounted compact seawater main as described in claim 1, characterized in that: The walls of the seawater structure compartment (3) are coated with an anti-corrosion buffer layer, and a sacrificial anode group (12) is fixedly arranged inside the seawater structure compartment (3).

3. A compact marine seawater main as described in claim 1, characterized in that: The left intake assembly includes a left sea valve (7) fixedly installed at the top of the low-level seawater tank (4), the left sea valve (7) is fixedly connected to a left seawater filter (6), the left seawater filter (6) is fixedly connected to a first flange butterfly valve (8), and the first flange butterfly valve (8) is fixedly connected to one side of the seawater structure chamber (3).

4. A compact marine seawater main as described in claim 1, characterized in that: The right intake assembly includes a right sea valve (10) fixedly installed on one side of the high-level seawater tank (5); the right sea valve (10) is fixedly connected to a right seawater filter (9), the right seawater filter (9) is fixedly connected to a second flange butterfly valve (11), and the second flange butterfly valve (11) is fixedly connected to one side of the seawater structure chamber (3).

5. A compact marine seawater main as described in claim 1, characterized in that: The purging unit (19) includes a diverter pipe (1902); a plurality of outlet ends are provided on one side of the diverter pipe (1902), and each of the plurality of outlet ends is fixedly connected to a purging strip cover (1901). A plurality of purging ports (19011) are respectively opened at the bottom of the plurality of purging strip covers (1901). An inlet end is provided on the side of the diverter pipe (1902) away from the outlet end, and the inlet end is fixedly connected to a connecting pipe (1903); the connecting pipe (1903) is connected to the flip-adjustment unit.

6. A compact marine seawater main as described in claim 5, characterized in that: The flip-adjustment unit includes a motor (16), the output shaft of which is fixedly connected to a rotating shaft (1905), and the rotating shaft (1905) is fixed to a fixing seat (1904) fixed on a connecting pipe (1903); there are two flip-adjustment units, the motors (16) of the two flip-adjustment units are respectively fixed on the outer wall of the high-level seawater tank (5) and the outer wall of the low-level seawater tank (4), and the rotating shafts (1905) of the two flip-adjustment units are respectively rotatably installed inside the high-level seawater tank (5) and the low-level seawater tank (4).

7. A compact marine seawater main as described in claim 5, characterized in that: It also includes two lifting pipes (14), which are installed on the low-level seawater tank (4) and the high-level seawater tank (5) respectively.

8. A compact marine seawater main as described in claim 7, characterized in that: The lifting pipe (14) includes an inlet pipe (1403) connected to the ship's air compressor pump; the inlet pipes (1403) of the two lifting pipes (14) are respectively fixedly installed on the top of the low-level seawater tank (4) and the high-level seawater tank (5) by fixing brackets (1404), the bottom of the inlet pipe (1403) is fixedly connected to a corrugated telescopic hose (1402), the bottom end of the corrugated telescopic hose (1402) is fixedly connected to a movable pipe (1401), and a movable bracket (1405) is fixed on the movable pipe (1401). The outer walls of the low-level seawater tank (4) and the high-level seawater tank (5) are both A telescopic component (1406) is fixed, and the output end of the telescopic component (1406) is fixed to the movable frame (1405). The top of the low-level seawater tank (4) and the high-level seawater tank (5) are both provided with holes, and a sealing ring (18) is fixed inside the hole. The movable tube (1401) passes through the hole, and the bottom end of the movable tube (1401) is fixedly connected to the bottom tube (1407). The bottom end of the bottom tube (1407) is fixedly connected to the insertion tube (1408). A cover (1409) is fixedly sleeved on the insertion tube (1408), and a sealing gasket (1410) is fixedly fixed at the bottom of the cover (1409).

9. A compact marine seawater main as described in claim 8, characterized in that: When the purging section (19) is in a horizontal state, the insertion tube (1408) of the lifting pipe (14) is aligned with the end of the connecting pipe (1903) of the purging section (19) away from the diversion pipe (1902).

10. An installation structure for a seawater main pipe, characterized in that: It includes the seawater main pipe as described in any one of claims 1 to 9 and a connecting seat (20) fixedly installed on the seawater structure compartment (3); the connecting seat (20) is fixed with an installation plate (21), and the installation plate (21) is provided with an installation hole (22).

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