A protective structure for a ship's LNG fuel tank

Abstract

The present application relates to a ship LNG fuel tank protection structure, and relates to the technical field of ship tank protection, which includes a mounting frame arranged on the hull, a mounting groove is provided on the mounting frame, the tank body is fixedly embedded in the mounting groove, and the mounting frame is also provided with a protection component for surface electrostatic treatment of the tank body and a shock-absorbing component for shock-absorbing the tank body; the protection component includes a water storage tank arranged on one side of the mounting frame, a spray pipe slidably arranged on the mounting frame, a grounding rod arranged on the mounting frame, and an adjusting member for slidingly driving the spray pipe, a spray groove is provided on the inner side wall of the mounting groove, the spray pipe is slidably arranged in the spray groove, the spray pipe is connected to the water storage tank, the spray pipe is arranged around the tank body, one end of the grounding rod is in contact with the surface of the tank body and the other end of the grounding rod is connected to the mounting frame. The present application has the effect of reducing the static electricity effect generated on the tank during ship transportation and improving the safety of the LNG tank.

Description

Technical Field

[0001] The present application relates to the technical field of LNG storage tank protection, and in particular to a ship LNG fuel tank protection structure. Background Art

[0002] Currently, 95% of ship power plants are diesel-powered. However, since diesel is a non-renewable energy source and diesel as a power source will cause air pollution, more and more ships are seeking breakthroughs in new energy power systems. LNG is liquid natural gas, which is formed by cooling gaseous natural gas to -162°C under normal pressure and condensing it into a liquid. The main component of LNG is methane, which has the advantages of being colorless, odorless, non-toxic, small in size, and light in weight. It also has high thermal energy value and a clean combustion product environment. Therefore, more and more ships are using LNG fuel as a practical power source.

[0003] A Chinese patent document with publication number CN219821681U discloses a ship LNG fuel tank protection structure, including an LNG tank arranged on the main deck, and a shielding shed arranged between the chimney and the LNG fuel tank, wherein the shielding cavity of the shielding shed is arranged near one side of the LNG fuel tank, and the concave area of ​​the shielding shed is arranged near one side of the chimney.

[0004] Regarding the above-mentioned related technologies, when used on actual ships, the above-mentioned tank protection structure can indeed insulate the storage tank. However, during the transportation of the ship, as the LNG fuel in the storage tank shakes with the hull, static electricity is likely to accumulate in the storage tank and in the pipes connected to the storage tank. When the static electricity accumulates enough energy, it will cause sparks, which may lead to fires and explosions, and easily cause property losses. Technicians often add antistatic agents to the material of the storage tank to reduce the accumulation and generation of static electricity. However, in actual situations, with the changes in external temperature and humidity and the movement of the liquid medium in the storage tank, static electricity is still likely to accumulate, so this needs to be improved. Summary of the invention

[0005] In order to reduce the impact of static electricity on storage tanks during ship transportation and improve the safety of LNG storage tanks, the present application provides a ship LNG fuel tank protection structure.

[0006] The present application provides a ship LNG fuel tank protection structure adopts the following technical solution:

[0007] A protective structure for an LNG fuel tank of a ship, comprising a mounting frame arranged on a hull, a mounting groove being provided on the mounting frame, a tank body being fixedly embedded in the mounting groove, a protective component for performing surface electrostatic treatment on the tank body and a shock-absorbing component for shock-absorbing the tank body being provided on the mounting frame; the protective component comprises a water storage tank arranged on one side of the mounting frame, a spray pipe slidably provided on the mounting frame, a grounding rod provided on the mounting frame and an adjusting member for driving the spray pipe to slide, a spray groove being provided on the inner side wall of the mounting groove, the spray pipe being slidably provided in the spray groove, the spray pipe being connected to the water storage tank, the spray pipe being arranged around the tank body, one end of the grounding rod being in contact with the surface of the tank body and the other end of the grounding rod being connected to the mounting frame; the mounting A accommodating cavity is provided at the bottom of the frame, and the shock-absorbing assembly includes a counterweight block slidably arranged in the accommodating cavity and a shock-absorbing belt connected to the counterweight block, the sliding direction of the counterweight block is consistent with the moving direction of the hull, and the mounting frame is also provided with a synchronous moving part for enabling the counterweight block to slide and drive the spray pipe; the grounding rod is rotatably arranged on the mounting frame, one end of the grounding rod is movably fitted with the spray pipe, and the grounding rod is movably rotated to be horizontal, when the grounding rod is rotated to be horizontal, the grounding rod, the mounting frame and the spray pipe are combined to form an electrostatic shielding cover for protecting the tank body, and the mounting frame is also provided with a rotating part for rotating and adjusting the grounding rod, when the hull has a large bumpy amplitude, the rotating part drives the grounding rod to rotate, so that the rotating rod abuts against the spray pipe.

[0008] By adopting the above technical scheme, when the storage tank is transported on the hull and bumps occur, the liquid in the tank body will flow and produce friction with the inner wall of the tank body. During the bumping process, the counterweight block moves with the bumping of the hull. Under the action of the shock-absorbing belt and the counterweight block, the vibration generated by the mounting frame and the tank body is damped, which plays the role of a tempered damper, reducing the shaking and vibration of the entire mounting frame and the tank body, thereby playing a shock-absorbing role on the tank body and the mounting frame, reducing the shaking of the tank body and the static electricity generated by the movement of liquid in the tank body, thereby improving the safety performance of the tank body.

[0009] At the same time, when the counterweight block shakes with the hull, under the action of the moving parts, the tank body to which the spray pipe is fitted is driven to slide, and the medium in the water tank is evenly sprayed to the surface of the tank body through the spray pipe, and fits with the surface of the tank body through the set grounding rod to achieve grounding of the tank body. The water tank here can be common water, and the static electricity in the tank body can be eliminated through grounding after spraying. The liquid in the water tank can also be an antistatic agent, which can neutralize the static electricity on the outer surface of the tank after direct spraying, and further reduce the static electricity outside the tank by grounding.

[0010] When a ship encounters thunderstorms during operation, it is often accompanied by strong winds and waves, and the liquid in the tank will shake more violently. In order to reduce the tank from becoming an electrostatic aggregate and causing lightning, when the shaking of the ship reaches a certain level, the rotating part rotates and adjusts the grounding rod so that adjacent grounding rods contact and abut each other. At this time, the grounding rod and the mounting frame form an electrostatic shielding cover to protect the tank, making it difficult for lightning to lock the tank, thereby improving the safety performance of the tank. At the same time, through this setting, the mounting frame and the tank are in the same position, and even if the liquid in the tank shakes violently and generates strong instantaneous static electricity, rainwater as a conductive medium can also achieve better grounding.

[0011] When the ship is running stably, the liquid in the tank body shakes less. The tiny static electricity generated at this time is eliminated by grounding the grounding rod, and the counterweight block is not easy to shake under the action of the shock-absorbing belt, thereby reducing spraying, saving spraying medium, and reducing the wear caused by the sliding of the spray pipe relative to the tank body.

[0012] Optionally, the moving part includes an adjusting rod rotatably set on the mounting frame and a connecting rod rotatably set in the accommodating cavity and connected to the counterweight block, one end of the connecting rod rotatably connected to the inner side wall of the accommodating groove is connected to the adjusting rod, and the rotation axis of the connecting rod is consistent with the rotation axis of the adjusting rod, and an adjusting block is provided on the spray pipe, and the adjusting block is threadedly assembled on the adjusting rod.

[0013] By adopting the above technical solution, when the counterweight block shakes with the shaking of the hull, the counterweight block drives the connecting rod to rotate, and the connecting rod drives the adjusting rod connected thereto to rotate. At this time, since the adjusting block and the adjusting rod are threadedly adapted, when the counterweight block reciprocates in the accommodating cavity, it drives the adjusting rod to rotate reciprocatingly, thereby realizing the reciprocating motion of the adjusting block on the adjusting rod, and realizing the reciprocating spraying of the spray pipe on the outer surface of the tank body.

[0014] Optionally, there are multiple groups of counterweight blocks, and there are multiple groups of spray pipes, which correspond one-to-one to the multiple groups of spray pipes. There are also multiple groups of grounding rods, and there are multiple groups of grounding rods, which correspond one-to-one to the multiple groups of spray pipes.

[0015] By adopting the above technical scheme, multiple groups of spray pipes, multiple groups of grounding rods and multiple groups of counterweights are set here. Since partitions are often provided in the tank body, even when the hull is bumpy, the flow state of the liquid in different areas of the tank body is inconsistent, and therefore the static electricity intensity generated locally is also inconsistent. Therefore, multiple groups of spray pipes are set to perform zoned grounding on the entire tank body to improve the uniformity of static electricity elimination on the entire tank body. At the same time, the grounding rod is set to a rotatable form, that is, in order to achieve grounding and static electricity elimination in different areas of the tank body, if only one group of grounding rods is set and directly set to the form of an electrostatic shielding cover, it is not easy to ground the local area of ​​the tank body, and it is easy to interfere with the sliding of the spray rod, resulting in the operation of local static electricity elimination on the tank body being more troublesome.

[0016] Optionally, a connecting pipe is provided between the water tank and the spray pipe, the connecting pipe connects the water tank and the spray pipe, a spiral blade is provided in the connecting pipe, the spiral blade is in contact with the inner wall of the connecting pipe, and a power part for enabling the counterweight block to drive the spiral blade is also provided on the mounting frame.

[0017] By adopting the above technical solution, during the movement of the counterweight block, the power parts are provided to drive the spiral blades to rotate, thereby transporting the medium in the corresponding water tank to the spray pipe to spray the outer surface of the tank body, without the need to provide an additional power source.

[0018] And when the hull is running smoothly, the liquid in the tank is not easy to produce strong friction with the inner wall of the tank, so it is not easy to produce strong instantaneous friction. At this time, the counterweight is not easy to shake, so the spiral blade is not easy to rotate, reducing the waste of medium in the water tank.

[0019] Optionally, a cleaning ring is provided on one side of the spray pipe, and the cleaning ring is arranged around the tank body, and the cleaning ring is in contact with the outer peripheral side of the tank body. A cleaning pad is also provided on the cleaning ring, and the cleaning pad is in contact with the outer peripheral wall of the tank body.

[0020] By adopting the above technical solution, when the sliding of the counterweight block drives the spray pipe to slide against the surface of the tank body, the spray pipe sprays the surface of the tank body, and the cleaning ring evenly applies the outer surface of the tank body, so that the conductive medium evenly covers the outer surface of the tank body.

[0021] Optionally, the power member includes a driving gear provided on the connecting rod and a driven gear coaxially provided on the spiral blade, a driving gear is rotatably provided on the mounting frame, the driving gear is sleeved on the outside of the driving gear, and a helical tooth groove 275 is provided on the inner peripheral wall of the driving gear, and the outer peripheral side of the driving gear is a helical tooth meshing with the helical tooth groove 275;

[0022] When the connecting rod rotates forward, the driving gear meshes with the active gear, driving the active gear to rotate, thereby driving the spiral blade to rotate, pressing the medium in the water tank out from the connecting pipe to spray the surface of the tank body. At the same time, the connecting rod drives the adjusting rod to rotate, thereby driving the spray pipe to slide, so as to achieve a large-scale spraying of the surface of the tank body.

[0023] When the connecting rod rotates in the opposite direction, the bevel teeth and the bevel tooth grooves 275 rotate relative to each other, and the connecting rod drives the adjusting rod to rotate, and drives the spray pipe to slide, so as to evenly apply the residual medium on the surface of the tank body.

[0024] Optionally, one end of the grounding rod abuts against the spray pipe, and the other end of the grounding rod abuts against another adjacent spray pipe, the rotating member includes a return spring arranged at the rotating shaft of the grounding rod, and the mounting frame is provided with a limiting member for limiting the position of the grounding rod.

[0025] By adopting the above technical solution, when the hull is shaken to a large extent, the counterweight block unlocks the limiting piece, and the grounding rod automatically deflects under the action of the return spring until it is horizontal. At this time, adjacent grounding rods abut against each other, so that the adjacent grounding rods and the mounting frame are combined into a whole, thereby realizing electrostatic shielding and stable protection of the tank body.

[0026] Optionally, the limiting member includes a limiting block slidably arranged on the mounting frame, the limiting block movably protrudes from the top of the mounting frame, and a limiting groove is provided on the limiting block, one end of the grounding rod is movably engaged in the limiting groove, and when the rotation amplitude of the counterweight block is too large, a power member for driving the limiting block to slide is also provided in the mounting frame.

[0027] By adopting the above technical solution, when it is normally necessary to stably ground a local position of the tank body, one end of the grounding rod is stably clamped in the limiting groove to achieve stable grounding of the tank body. When the hull has a large vibration amplitude, the power part drives the limiting block to slide, so that the limiting block unlocks the grounding rod, thereby causing the grounding rod to automatically rotate under the action of the return spring.

[0028] Optionally, the power component includes a power block slidably arranged on the mounting frame, the end side of the power block protrudes from the side wall of the accommodating cavity, and the protruding end side of the power block is arranged in an inclined state, the counterweight block is movably fitted with the inclined side of the power block, and a power groove is opened on one side of the limiting block located in the mounting frame, the side of the power groove is arranged in an inclined state, the end side of the power block located in the mounting frame is movably inserted into the power groove, and the end side of the power block is tightly pressed against the side of the power groove.

[0029] By adopting the above technical solution, when the counterweight block moves with a large amplitude, the counterweight block presses against the power block to make the power block slide, and the power block presses against the inclined side of the power slot to drive the limiting block to slide, so that the grounding rod is separated from the limiting slot, and the grounding rod rotates under the action of the return spring, thereby realizing the coordination between the grounding rod and the spray pipe and realizing the electrostatic shielding of the tank body.

[0030] Optionally, a clamping block is provided on the end side of the grounding rod, a clamping groove is provided on the grounding rod, and the clamping block on one grounding rod is clamped and adapted with the clamping groove on the adjacent grounding rod.

[0031] By adopting the above technical solution, when the grounding rods are rotated to be horizontal, the clamping grooves on the adjacent grounding rods are clamped and adapted with the clamping blocks, so that a stable electrostatic shielding structure is formed when the tank body is electrostatically shielded.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. Through the spray pipe, grounding rod and adjustment piece for sliding adjustment of the spray pipe, when the liquid in the tank generates static electricity as the hull shakes, the conductive medium in the water tank is sprayed to the outer surface of the tank through the spray pipe to remove static electricity from the outer surface of the tank, thereby reducing the static electricity generated by the local liquid shaking in the tank and improving the safety performance of the storage tank during the operation of the hull;

[0034] 2. Through the counterweight block, adjustment rod and connecting rod, when the counterweight block shakes with the operation of the hull during the operation of the hull, the shaking of the counterweight block drives the connecting rod to rotate, so as to realize the sliding adjustment of the spray pipe, so that the spray pipe can spray a large area of ​​the outer wall of the tank body;

[0035] 3. Through the setting of the synchronous moving parts and the grounding rod, when the ship encounters thunderstorm weather during operation, the hull shakes greatly, and there are more static electricity particles in the air at this time. At this time, through the action of the synchronous moving parts, the counterweight drives the grounding rod to rotate, so that the grounding rod rotates to a position that fits the spray pipe, so that the grounding rod, the mounting frame, and the spray pipe are combined to form a shielding cover to protect the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0037] Figure 2 It is a schematic diagram of the overall structure from another perspective;

[0038] Figure 3 It is a schematic diagram of the connection structure of the driving gear and the active gear;

[0039] Figure 4It is a schematic diagram of the connection structure of the sprinkler pipe, water tank and counterweight.

[0040] 1. Tank body; 11. Mounting frame; 12. Mounting slot; 2. Protective assembly; 21. Water tank; 211. Connecting pipe; 22. Spray pipe; 23. Spray slot; 24. Adjusting member; 241. Adjusting rod; 242. Connecting rod; 243. Adjusting block; 25. Grounding rod; 251. Return member; 26. Spiral blade; 27. Power member; 271. Driving gear; 272. Active gear; 273. Driven gear; 274. Helical teeth; 275. Helical tooth groove 275; 3. Shock-absorbing assembly; 31. Accommodating chamber; 32. Counterweight block; 33. Shock-absorbing belt; 35. Limiting block; 351. Limiting slot; 36. Sliding member; 361. Power block; 362. Power slot; 37. Snap-in block; 371. Snap-in slot. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-4 This application is described in further detail.

[0042] The present application embodiment discloses a protective structure for a ship LNG fuel tank 1. Figure 1 A protective structure for a ship LNG fuel tank body 1 includes a mounting frame 11 fixed on the hull, the mounting frame 11 is arranged in a long strip shape, the mounting frame 11 is arranged horizontally, and the arrangement direction of the mounting frame 11 is perpendicular to the traveling direction of the ship, and a mounting groove 12 for mounting and placing the tank body 1 is opened on the top side of the mounting frame 11, the mounting groove 12 is "U"-shaped, the inner circumferential wall of the mounting groove 12 is fitted with the outer circumferential wall of the tank body 1, and one end of the mounting groove 12 along the length direction of the tank body 1 is closed, and a baffle is rotatably connected to the mounting frame 11 at the other end of the mounting groove 12, the baffle is fitted and pressed against the end side of the tank body 1, and bolts are threadedly assembled between the baffle and the mounting frame 11, and the baffle and the mounting frame 11 are fixed by bolts.

[0043] Reference Figure 1 and Figure 2 The mounting frame 11 is also provided with a protective component 2 for protecting the surface of the tank body 1 and a shock absorbing component 3 for shock absorbing the tank body 1. The mounting frame 11 is provided with a spraying groove 23 on the inner wall of the mounting groove 12. The protective component 2 includes a water storage tank 21 provided in the mounting frame 11, a grounding rod 25 provided on the mounting frame 11, and a spraying pipe 22 slidably provided in the spraying groove 23. The sliding direction of the spraying pipe 22 is consistent with the length direction of the tank body 1. The water storage tank 21 is connected with the spraying pipe 22. The inner peripheral wall of the spraying pipe 22 is in contact with the outer peripheral wall of the tank body 1. The inner peripheral wall of the spraying pipe 22 is provided with a spraying hole. The mounting frame 11 is also provided with an adjusting member 24 for slidingly adjusting the spraying pipe 22. It should be noted that the water storage tank 21 can store either fresh water or an antistatic agent.

[0044] A grounding rod 25 is also rotatably provided on the mounting frame 11, one end of the grounding rod 25 is in contact with the outer peripheral wall of the tank body 1, and the other end of the grounding rod 25 is in contact with the mounting frame 11. An electrostatic block is provided at the end of the grounding rod 25 in contact with the tank body 1. In the present application, the electrostatic block is a zinc block, thereby reducing the problem of rust on the tank body 1 and the mounting frame 11 under the erosion of sea breeze and sea water, improving the surface quality of the tank body 1, and achieving stable grounding of the tank body 1, thereby achieving static electricity elimination on the outer wall of the tank body 1; at the same time, when the grounding rod 25 is rotated to a horizontal position, the grounding rod 25 is in contact with the outer side wall of the spray pipe 22, and the grounding rod 25, the spray pipe 22, and the mounting frame 11 together form an electrostatic shielding cover for electrostatically shielding the tank body 1.

[0045] The bottom side of the mounting frame 11 is provided with a receiving cavity 31, and the shock absorbing assembly 3 includes a counterweight block 32 movably arranged in the receiving cavity 31 and a shock absorbing belt 33 connected to the counterweight block 32. In the present application, the shock absorbing belt 33 is a spring connected to the counterweight block 32, and there are two groups of springs, which are relatively arranged on both sides of the counterweight block 32. In other embodiments, the shock absorbing belt 33 can also be modified into an elastic belt with elastic material according to actual conditions. Through this arrangement, when the mounting frame 11 shakes with the navigation of the ship under the action of the counterweight block 32 and the shock absorbing belt 33, the shaking of the mounting frame 11 is reduced, thereby improving the stability of the tank body 1 installed on the mounting frame 11.

[0046] Since the tank 1 on the ship is divided into two forms, one is fixed on the deck directly by welding, and the other is fixed on the deck by a fixing frame. The method of directly fixing on the deck by welding can form a better grounding of the tank 1, but it is not convenient for the subsequent disassembly of the tank 1; when fixed by a fixing frame, it is not easy to ensure that all parts of the tank 1 can achieve good grounding, which is prone to safety hazards. During the operation of the ship, a partition is usually provided in the tank 1 to reduce the impact of the inertia of the tank 1 on the tank 1 when it flows, so the tank 1 is The liquid flow state is inconsistent, and the instantaneous static electricity generated by the liquid under different flow states is also inconsistent. Therefore, the degree of static electricity elimination of various parts of the tank body 1 during the operation of the ship is also inconsistent. In order to solve this problem, the shock absorbing assembly 3 and the protective assembly 2 on the mounting frame 11 are provided with multiple groups, and the multiple groups of shock absorbing assemblies 3 and the multiple groups of protective assemblies 2 are arranged at intervals along the length direction of the tank body 1. In the present application, the shock absorbing assembly 3 and the protective assembly 2 are provided with three groups. In other embodiments, the shock absorbing assembly 3 and the protective assembly 2 can also be set to two groups, four groups, five groups, etc., and the arrangement method is consistent with the present application.

[0047] At the same time, ships often encounter thunderstorms when sailing, and in thunderstorms, ships will shake violently. In this situation, the shaking of the liquid in the storage tank is more obvious, which is easy to be locked by lightning and cause accidents. Therefore, in order to improve this problem, the grounding rod 25 is rotatably set on the mounting frame 11, and the mounting frame 11 is provided with a rotating part for driving the counterweight block 32 to rotate the grounding rod 25.

[0048] Reference Figure 2 and Figure 4 The adjusting member 24 includes an adjusting rod 241 rotatably arranged in the mounting frame 11. The adjusting rod 241 is arranged horizontally, and the rotation axis of the adjusting rod 241 is consistent with the length direction of the tank body 1. A connecting rod 242 is also rotatably connected in the mounting frame 11. The rotation axis of the connecting rod 242 is consistent with the rotation axis of the adjusting rod 241, and the connecting rod 242 is arranged perpendicular to the adjusting rod 241. One end of the connecting rod 242 is fixedly connected to one end of the adjusting rod 241, and the end of the connecting rod 242 away from the adjusting rod 241 is connected to the counterweight block 32. Originally, during the navigation of the ship, the counterweight block 32 will swing in many directions with the navigation of the ship. Under the limiting action of the connecting rod 242 and the adjusting rod 241, the counterweight block 32 only swings along the navigation direction of the ship. At the same time, the outer end of the adjusting rod 241 located in the mounting frame 11 is provided with an external thread, and the bottom side of the spray pipe 22 is fixedly connected with an adjusting block 243, and the adjusting block 243 is threadedly assembled on the adjusting rod 241. Therefore, during the navigation of the ship, the counterweight block 32 shakes with the operation of the ship to reduce the shock of the mounting frame 11, and at the same time drives the spray pipe 22 to slide against the outer wall of the tank body 1, thereby performing an electrostatic elimination operation on the outer wall of the tank body 1.

[0049] At the same time, since the mounting frame 11 is continuously exposed, if an additional power source is provided on the mounting frame 11 to extract the conductive medium in the water tank 21 from the spray pipe 22, it will involve electricity and additional output power, which is more likely to generate static electricity during operation. Moreover, the power source is easily corroded by being exposed to the outside all year round and eroded by the sea breeze. Therefore, in order to solve this problem, a connecting pipe 211 is fixedly connected between the water tank 21 and the spray pipe 22. The connecting pipe 211 connects the spray pipe 22 and the water tank 21 as a whole. The end of the connecting pipe 211 connected to the spray pipe 22 is connected by a hose. A spiral blade 26 is rotatably connected in the connecting pipe 211. The rotation axis of the spiral blade 26 is parallel to the rotation axis of the connecting rod 242, and a power part 27 for driving the spiral blade 26 to rotate is provided in the mounting frame 11.

[0050] Reference Figure 2 and Figure 3The power member 27 includes a driving gear 271 provided on the connecting rod 242 and a driven gear 273 provided at the rotating shaft of the spiral blade 26. The mounting frame 11 is also rotatably connected with a driving gear 272, the driving gear 272 meshes with the driven gear 273, the driving gear 272 is coaxial with the driving gear 271 and the driving gear 272 is provided on the outer peripheral side of the driving gear 271, the driving gear 272 is annular, and a helical tooth groove 275275 is provided on the inner peripheral wall of the driving gear 272, and the outer peripheral side of the driving gear 271 is provided with helical teeth, which mesh with the helical tooth groove 275275, that is, when the counterweight 32 drives the connecting rod 242 to rotate forward, the driving gear 271 rotates forward, at this time the helical teeth mesh with the helical tooth groove 275275, at this time the driving gear 271 drives the driving gear 272 to rotate, and the driving gear 272 drives the driven gear 273 to rotate, thereby realizing the rotation of the spiral blade 26, and squeezing the conductive medium in the connecting pipe 211 out of the spray pipe 22; when the counterweight block 32 drives the connecting rod 242 to rotate in the opposite direction, the driving gear 271 rotates in the opposite direction, and the helical tooth grooves 275275 and the helical teeth rotate relative to each other, so that it is not easy to drive the active gear 272 to rotate, and then the spiral blade 26 is not easy to rotate in the opposite direction at this time, and then only the conductive medium is transported, and no reverse transport occurs. At the same time, the conductive medium of the spray pipe 22 is transported through the shaking of the ship during operation, without setting up an additional power source, saving energy, and during the navigation of the ship, when sailing smoothly, the counterweight block 32 is not easy to shake, so that the conductive medium is not easy to spray out from the spray pipe 22, reducing the waste of resources.

[0051] Furthermore, in order to achieve protection for the storage tank in extreme weather, a rotating member for rotating and adjusting the grounding rod 25 is provided on the mounting frame 11, and the grounding rod 25 is rotatably connected to the mounting frame 11, and the rotation axis of the grounding rod 25 is perpendicular to the length direction of the grounding rod 25, and the mounting frame 11 is also provided with a limiting member for limiting the position of the grounding rod 25, refer to Figure 3 and Figure 4 The limiting member includes a limiting block 35 slidably set on the mounting frame 11, the sliding direction of the limiting block 35 is consistent with the height direction of the mounting frame 11, and a limiting groove 351 is opened at the top of the limiting block 35, the grounding rod 25 is snap-fitted with the limiting groove 351, and the side wall of the grounding rod 25 is in contact with the side wall of the limiting groove 351, and the rotating member includes a return member 251 coaxially fixed at the rotating shaft of the grounding rod 25. In the present application, the return member 251 is a torsion spring, that is, when the grounding rod 25 is rotated to be snap-fitted into the limiting groove 351, the torsion spring is in a compressed state, and when the grounding rod 25 is rotated to be horizontal, the torsion spring is in a normal state.

[0052] At the same time, in order to realize automatic sliding adjustment of the limiting block 35 in extreme weather, a sliding member 36 is also provided on the mounting frame 11, and the sliding member 36 includes a power block 361 slidably arranged in the mounting frame 11, one end of the power block 361 is located in the mounting frame 11, and the other end is located in the accommodating chamber 31, and the end of the power block 361 located in the accommodating chamber 31 is tightly abutted against the side wall of the counterweight block 32, and the end of the power block 361 located in the accommodating chamber 31 is located at the top position of the accommodating chamber 31, and a power groove 362 is opened at one end of the limiting block located in the mounting frame 11, and a side wall of the power groove 362 is inclined, and the power block 361 is located in the mounting frame 11. 1 is movably inserted into the power groove 362, and the power block 361 is pressed against the inclined side of the power groove 362. When the ship shakes greatly during operation, the counterweight block 32 is rotated to the maximum position. At this time, the counterweight block 32 and the power block 361 are fitted and pressed against each other, so that the power block 361 moves into the mounting frame 11, and the power block 361 is pressed against the side wall of the power groove 362, so that the limiting block 35 is lowered. At this time, the limiting block 35 unlocks the grounding rod 25, so that the grounding rod 25 automatically rotates under the action of the torsion spring, so that the grounding rod 25 is overlapped with the spray pipe 22, and an electrostatic shielding cover is formed to protect the tank body 1.

[0053] At the same time, in order to achieve stable protection of the tank body 1 when the grounding rod 25 is rotated to horizontal, a clamping block 37 is provided at one end of the grounding rod 25, and a clamping groove 371 is provided on the adjacent grounding rod 25, and the clamping block 37 is clamped and adapted with the clamping groove 371.

[0054] When the grounding rod 25 rotates to a horizontal position, adjacent grounding rods 25 rotate to a mutually connected position, at which time the clamping block 37 is clamped with the clamping groove 371, thereby further forming a whole with the mounting frame 11 to achieve stable protection of the storage tank.

[0055] The implementation principle of the protective structure of the LNG fuel tank body 1 of a ship in an embodiment of the present application is as follows: during the operation of the ship, when the ship shakes, the counterweight block 32 shakes with the navigation of the ship, and at the same time, the liquid in the tank body 1 and the inner wall of the tank body 1 generate friction to generate static electricity. At this time, the counterweight block 32 drives the connecting rod 242 to rotate, thereby rotating the adjusting rod 241, so that the spray pipe 22 fits the surface of the tank body 1 to coat the conductive medium, and at the same time drives the spiral blade 26 to rotate, and the conductive medium in the water tank 21 is discharged from the spray pipe 22. Under the action of the conductive medium and the grounding rod 25, the tank body 1 is grounded, and multiple sets of grounding rods 25 and counterweight blocks 32 are provided, so that good grounding operations are performed on various parts of the tank body 1, so that the generation of local static electricity on the tank body 1 is eliminated.

[0056] When the ship encounters a thunderstorm or produces a huge shake during navigation, the counterweight block 32 presses against the power block 361 to slide, so that the power block 361 presses against the limiting block 35 to slide, and the limiting block 35 moves toward the direction inside the mounting frame 11. The limiting block 35 unlocks the grounding rod 25. At this time, the grounding rod 25 automatically twists under the action of the torsion spring until it is horizontal. When the grounding rod 25 rotates to the horizontal, the clamping block 37 on the adjacent grounding rod 25 is clamped with the clamping groove 371 to stably form an electrostatic shielding cover, thereby achieving the same potential as the tank body 1 and the mounting frame 11.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A protective structure for a ship LNG fuel tank (1), characterized in that: The invention comprises a mounting frame (11) arranged on the hull, the mounting frame (11) being provided with a mounting groove (12), the tank body (1) being fixedly embedded in the mounting groove (12), and the mounting frame (11) being further provided with a protective component (2) for performing surface electrostatic treatment on the tank body (1) and a shock absorbing component (3) for performing shock absorption on the tank body (1); The protection component (2) comprises a water storage tank (21) arranged on one side of the mounting frame (11), a spray pipe (22) slidably arranged on the mounting frame (11), a grounding rod (25) arranged on the mounting frame (11), and an adjusting member (24) for slidingly driving the spray pipe (22); a spray groove (23) is provided on the inner side wall of the mounting groove (12); the spray pipe (22) is slidably arranged in the spray groove (23); the spray pipe (22) is connected to the water storage tank (21); the spray pipe (22) is arranged around the tank body (1); one end of the grounding rod (25) is in contact with the surface of the tank body (1) and the other end of the grounding rod (25) is connected to the mounting frame (11); The bottom of the mounting frame (11) is provided with a receiving cavity (31), the shock absorbing assembly (3) comprises a counterweight block (32) slidably arranged in the receiving cavity (31) and a shock absorbing belt (33) connected to the counterweight block (32), the sliding direction of the counterweight block (32) is consistent with the moving direction of the hull, and the mounting frame (11) is also provided with a synchronous moving member for enabling the counterweight block (32) to slide and drive the spray pipe (22); The grounding rod (25) is rotatably mounted on the mounting frame (11), one end of the grounding rod (25) is movably fitted with the spray pipe (22), and the grounding rod (25) is movably rotated to be horizontal. When the grounding rod (25) is rotated to be horizontal, the grounding rod (25), the mounting frame (11), and the spray pipe (22) together form an electrostatic shielding cover for protecting the tank body (1). The mounting frame (11) is also provided with a rotating member for rotating and adjusting the grounding rod (25). When the hull is bumpy with a large amplitude, the rotating member drives the grounding rod (25) to rotate, so that the rotating rod abuts against the spray pipe (22); The co-moving member comprises an adjusting rod (241) rotatably arranged on the mounting frame (11) and a connecting rod (242) rotatably arranged in the accommodating cavity (31) and connected to the counterweight block (32); one end of the connecting rod (242) rotatably connected to the inner side wall of the accommodating groove is connected to the adjusting rod (241), and the rotation axis of the connecting rod (242) is consistent with the rotation axis of the adjusting rod (241); an adjusting block (243) is provided on the spray pipe (22), and the adjusting block (243) is threadedly assembled on the adjusting rod (241); The counterweight blocks (32) are provided in multiple groups, and the spray pipes (22) are also provided in multiple groups. The multiple groups of counterweight blocks (32) correspond one-to-one to the multiple groups of spray pipes (22). The grounding rods (25) are also provided in multiple groups, and the multiple groups of grounding rods (25) correspond one-to-one to the multiple groups of spray pipes (22).

2. A protective structure for a ship LNG fuel tank (1) according to claim 1, characterized in that: A connecting pipe (211) is provided between the water storage tank (21) and the spray pipe (22), the connecting pipe (211) connecting the water storage tank (21) and the spray pipe (22), a spiral blade (26) is provided in the connecting pipe (211), the spiral blade (26) is in contact with the inner wall of the connecting pipe (211), and a power part (27) for enabling the counterweight block (32) to drive the spiral blade (26) is also provided on the mounting frame (11).

3. A protective structure for a ship LNG fuel tank (1) according to claim 2, characterized in that: A cleaning ring is provided on one side of the spray pipe (22), the cleaning ring is arranged around the tank body (1), and the cleaning ring is in contact with the outer peripheral side of the tank body (1), and a cleaning pad is also provided on the cleaning ring, and the cleaning pad is in contact with the outer peripheral wall of the tank body (1).

4. A ship LNG fuel tank body (1) protection structure according to claim 3, characterized in that: The power member (27) comprises a driving gear (271) arranged on the connecting rod (242) and a driven gear (273) coaxially arranged on the spiral blade (26); a driving gear (272) is rotatably arranged on the mounting frame (11); the driving gear (272) meshes with the driven gear (273); the driving gear (272) is sleeved on the outside of the driving gear (271); an inner peripheral wall of the driving gear (272) is provided with a helical tooth groove (275); and the outer peripheral side of the driving gear (271) is provided with helical teeth (274) meshing with the helical tooth groove (275); When the connecting rod (242) rotates in the forward direction, the driving gear (271) meshes with the driving gear (272), driving the driving gear (272) to rotate, thereby driving the spiral blade (26) to rotate, pressing the medium in the water storage tank (21) out from the connecting pipe (211) to spray the surface of the tank body (1); at the same time, the connecting rod (242) drives the adjusting rod (241) to rotate, thereby driving the spray pipe (22) to slide, thereby achieving a large-scale spraying of the surface of the tank body (1); When the connecting rod (242) rotates in the opposite direction, the bevel teeth (274) and the grooves of the bevel teeth (274) rotate relative to each other, and the connecting rod (242) drives the adjustment rod (241) to rotate, driving the spray pipe (22) to slide, thereby evenly smearing the medium remaining on the surface of the tank body (1).

5. A ship LNG fuel tank (1) protection structure according to claim 4, characterized in that: One end of the grounding rod (25) abuts against the spray pipe (22), and the other end of the grounding rod (25) abuts against another adjacent spray pipe (22); the rotating member comprises a return spring arranged at the rotating shaft of the grounding rod (25); and a limiting member for limiting the position of the grounding rod (25) is provided on the mounting frame (11).

6. A protective structure for a ship LNG fuel tank (1) according to claim 5, characterized in that: The limiting member comprises a limiting block (35) slidably arranged on the mounting frame (11); the limiting block (35) is movably protruded from the top of the mounting frame (11); a limiting groove (351) is provided on the limiting block (35); one end of the grounding rod (25) is movably engaged with the limiting groove (351); and when the rotation amplitude of the counterweight block (32) is too large, a sliding member (36) for driving the limiting block (35) to slide is further provided in the mounting frame (11).

7. A ship LNG fuel tank (1) protection structure according to claim 6, characterized in that: The sliding member (36) comprises a power block (361) slidably arranged on the mounting frame (11); the end side of the power block (361) protrudes from the side wall of the accommodating cavity (31), and the protruding end side of the power block (361) is arranged in an inclined shape; the counterweight block (32) is movably fitted with the inclined side of the power block (361); a power groove (362) is provided on one side of the limiting block (35) located in the mounting frame (11); the side of the power groove (362) is arranged in an inclined shape; the end side of the power block (361) located in the mounting frame (11) is movably inserted into the power groove (362), and the end side of the power block (361) is tightly abutted against the side of the power groove (362).

8. A ship LNG fuel tank (1) protection structure according to claim 7, characterized in that: A clamping block (37) is provided on the end side of the grounding rod (25), and a clamping groove (371) is provided on the grounding rod (25). The clamping block (37) on one grounding rod (25) is clamped and adapted to the clamping groove (371) on the adjacent grounding rod (25).

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