A deep-cold liquid filling ship cargo hold

Abstract

The present invention belongs to the technical field of cryogenic liquid transportation, and specifically relates to a cargo hold for a ship used for filling cryogenic liquid, comprising a cabin, wherein a baffle is fixedly installed inside the cabin, and the baffle is provided in multiple groups, and the multiple groups of baffles are arranged in an equidistant array, and an anti-sway mechanism and an auxiliary anti-sway component are provided inside the cabin for preventing the liquid from swaying. The cargo hold for filling cryogenic liquid by using the anti-sway mechanism, when the cryogenic liquid oscillates, first squeezes the blocking member, and performs the first blocking under the action of damper 1 and return spring; at the same time, hinged rod 1 drives the L-shaped rod to rotate, so that the anti-sway plate moves in the direction of liquid oscillation, forming a secondary blocking, and the multiple groups of anti-sway mechanisms enable the cryogenic liquid to be stopped multiple times during the process of oscillation and impact. This multi-stage anti-sway structure weakens the liquid sloshing energy layer by layer. Compared with the traditional anti-sway method, it can more effectively cope with large-scale liquid oscillations and reduce the impact force of the liquid on the bulkhead.

Description

Technical Field

[0001] The invention relates to the technical field of cryogenic liquid transportation, in particular to a cryogenic liquid filling ship cargo hold. Background Art

[0002] Cryogenic liquids are widely used in energy, industry and other fields, and shipping is an important mode of transportation. Taking LNG as an example, the cargo holds of cryogenic liquids are mostly rectangular structures. Because the width of the cargo hold is much smaller than the length, the sloshing amplitude and impact force of the cryogenic liquid in the length direction are significantly higher than those in the width direction. Therefore, it is necessary to add baffles in the length direction of the cargo hold.

[0003] Currently, existing technologies, such as Chinese patent publication number CN110877663B, disclose a liquid cargo tank and its anti-sloshing device for an LNG bunkering vessel. This device reduces the oscillation of the cryogenic liquid in the cargo tank by installing a baffle, adding an anti-sloshing wall, and a diversion hole. However, this solution has the following limitations: conventional baffles are fixed rigid structures. When the cryogenic liquid sloshes significantly (such as when the ship encounters a severe storm or rapid acceleration / deceleration), the liquid impacting the baffle is susceptible to secondary reflection waves, exacerbating the fluid disturbance within the tank. While the diversion hole can alleviate local pressure, it cannot effectively dissipate high-frequency sloshing energy, and its effectiveness is particularly limited in suppressing long-period, large-amplitude sloshing. In view of this, a cargo tank for a cryogenic liquid bunkering vessel is proposed. Summary of the Invention

[0004] The main purpose of the present invention is to provide a cryogenic liquid filling ship cargo hold, which can solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention proposes a cryogenic liquid filling ship cargo hold, comprising a cabin, wherein a baffle is fixedly installed inside the cabin, and a plurality of baffles are provided, wherein the plurality of baffles are arranged in an equidistant array, and an anti-sway mechanism and an auxiliary anti-sway component are provided inside the cabin for preventing the liquid from swaying, wherein the anti-sway mechanism comprises:

[0006] A guide rod, the guide rod being fixedly connected to the outer wall of the baffle, and a connecting frame being fixedly connected to the outer wall of the guide rod;

[0007] An L-shaped rod, the L-shaped rod being hinged to the outer wall of the connecting frame, the bottom of the L-shaped rod being fixedly connected to a swing-stop plate, and one end of the L-shaped rod away from the connecting frame being hinged to a hinge rod 1;

[0008] The blocking member is arranged at one end of the hinged rod away from the L-shaped rod, and a damper 1 is connected between the blocking member and the connecting frame. During the oscillation of the cryogenic liquid, the cryogenic liquid squeezes the blocking member through the baffle. At this time, under the action of the damper 1 and the return spring, the oscillation of the cryogenic liquid is blocked for the first time. At the same time, during the movement of the blocking member squeezing the return spring, the hinged rod 1 drives the L-shaped rod to rotate, so that the anti-oscillation plate moves in the direction of the oscillation of the cryogenic liquid, thereby further stopping the oscillation of the cryogenic liquid.

[0009] Preferably, the blocking member consists of a movable plate, a hinged plate and a second damper, the movable plate is fixed to the first damper, the movable plate is elastically connected to the connecting frame by a return spring, the movable plate and the hinged plate are elastically connected by an arc spring, the two ends of the second damper are respectively fixedly connected to the movable plate and the hinged plate, a sliding groove is provided on the outer wall of the movable plate, the sliding groove is matched with the guide rod, and when the cryogenic liquid vibrates and impacts the hinged plate, the hinged plate and the movable plate can be protected under the action of the arc spring and the second damper.

[0010] Preferably, there are multiple groups of anti-swing mechanisms, and each group of the anti-swing mechanisms is arranged between two groups of baffles. There are two groups of L-shaped rods, anti-swing plates, hinged rods and blocking members in each group of the anti-swing mechanisms, and they are symmetrically arranged about the center line of the connecting frame. This arrangement enables the cryogenic liquid to be stopped multiple times during the process of oscillation and impact.

[0011] Preferably, a first fixing block and a second fixing block are fixedly connected to the outer wall of the L-shaped rod, and a round rod is fixedly connected between the first fixing block and the second fixing block.

[0012] Preferably, a through hole 1 is provided on the outer wall of the anti-sway plate, and the bottom of the anti-sway plate is bent toward the side away from the auxiliary anti-sway component. The design of through hole 1 enables cryogenic liquid to pass through the anti-sway plate, thereby preventing the cryogenic liquid from having excessive impact on the anti-sway plate and causing damage to the anti-sway plate. In addition, the bending part of the anti-sway plate can slow down the flow speed of the cryogenic liquid and improve the anti-sway effect.

[0013] Preferably, the auxiliary anti-sway assembly includes an air chamber, which is fixedly connected to the top of the anti-sway plate, and the air chamber is penetrated by the piston rod and is slidably connected to the piston rod. The air chamber is connected to an air pipe, and the end of the air pipe away from the air chamber is connected to an air bag, and the end of the piston rod away from the air chamber is fixedly connected to a sliding plate, and the sliding plate away from the piston rod is hinged with a hinge rod 2 on the side, and the end of the hinge rod 2 away from the sliding plate is hinged to the lower side of the connecting frame, and the anti-sway plate is driven to rotate by the L-shaped rod. Under the action of the hinge rod 2, the sliding plate is moved, driving the piston rod to move upward, squeezing the gas in the air chamber into the air bag, causing the air bag to expand, so as to facilitate the subsequent improvement of the anti-sway effect.

[0014] Preferably, a through opening is provided on the outer wall of the airbag, and the through opening matches the through hole. The sliding plate is penetrated by the round rod and is slidably connected to the round rod. During the expansion of the airbag, the through opening provided therein will gradually decrease, reducing the speed at which the cryogenic liquid passes through, causing the cryogenic liquid to move toward the direction of the anti-sway plate close to the inner wall of the cargo hold, further improving the anti-sway effect on the cryogenic liquid.

[0015] Preferably, a sealing ring is provided in the gas chamber for enhancing the sealing performance of the piston rod when it slides. A piston plate is slidably connected in the gas chamber, and the piston plate is fixed to the piston rod.

[0016] Preferably, when the movable plate moves toward the connecting frame, the first hinge rod drives the L-shaped rod to rotate, and the second hinge rod pulls the sliding plate to slide upward.

[0017] Preferably, a second through hole is provided on the outer wall of the baffle, a notch is provided on the top of the baffle, a reinforcement is fixedly connected to the outer wall of the baffle, and the reinforcement is fixedly installed in the cabin and is used through the second through hole to facilitate the passage of cryogenic liquid during flow, thereby preventing the baffle from being damaged by excessive pressure. The use of the notch allows the violently oscillating cryogenic liquid to pass quickly, thereby further protecting the baffle.

[0018] The present invention provides a cryogenic liquid filling ship cargo hold. It has the following beneficial effects:

[0019] (1) The cryogenic liquid filling ship cargo hold uses an anti-sloshing mechanism. When the cryogenic liquid oscillates, the blocking member is first squeezed, and the first blocking is performed under the action of the damper 1 and the return spring; at the same time, the hinged rod 1 drives the L-shaped rod to rotate, so that the anti-sloshing plate moves in the direction of liquid oscillation, forming a secondary blocking. In addition, multiple groups of anti-sloshing mechanisms are set up, so that the cryogenic liquid can be stopped multiple times during the process of oscillation and impact. This multi-stage anti-sloshing structure weakens the liquid sloshing energy layer by layer. Compared with the traditional anti-sloshing method, it can more effectively deal with large-scale liquid oscillations and reduce the impact force of the liquid on the bulkhead.

[0020] (2) The cryogenic liquid is filled into the cargo hold of the ship through the anti-sway mechanism and the auxiliary anti-sway component. The L-shaped rod rotates to drive the piston rod to squeeze the gas in the air chamber into the air bag, causing it to expand. During the expansion of the air bag, the opening provided therein will gradually decrease, reducing the speed of the cryogenic liquid passing through, causing the cryogenic liquid to move toward the anti-sway plate close to the inner wall of the cargo hold, further improving the anti-sway effect on the cryogenic liquid.

[0021] (3) The cryogenic liquid filling ship cargo hold uses a blocking member. When the cryogenic liquid impacts the hinged plate, the arc spring and the damper 2 can buffer the impact and protect the hinged plate and the movable plate. At the same time, the blocking member is allowed to adaptively adjust the position and angle according to the impact force of the liquid. In addition, the bottom of the anti-sway plate is bent and has a through hole 1, which can adapt to the liquid flow characteristics under different loading amounts and different sloshing intensities. Regardless of the amplitude of the liquid oscillation, it can effectively play an anti-sloshing role and improve the anti-sloshing effect on the cryogenic liquid.

[0022] (4) The cargo hold for cryogenic liquid filling ships is provided with a through hole 2 and a notch in the baffle to facilitate the passage of cryogenic liquid and prevent the baffle from being damaged due to excessive pressure. The provision of reinforcement further enhances the strength of the baffle. The through hole 1 of the anti-sway plate is designed to prevent damage to the plate due to excessive liquid impact. The bending structure slows down the liquid flow rate and disperses the impact force. The multiple protection design reduces the risk of damage to key components of the cargo hold and extends the service life of the hold and the anti-sway mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 Schematic diagram of the overall internal structure of the present invention Figure 1 ;

[0026] Figure 3 Schematic diagram of the overall internal structure of the present invention Figure 2 ;

[0027] Figure 4 Schematic diagram of the structure of the baffle, anti-sway mechanism and auxiliary anti-sway assembly of the present invention;

[0028] Figure 5 Schematic diagram of the anti-swing mechanism and auxiliary anti-swing assembly of the present invention;

[0029] Figure 6 It is a partial structural diagram of the anti-swing mechanism and auxiliary anti-swing assembly of the present invention;

[0030] Figure 7 It is a partial cross-sectional structural diagram of the anti-swing mechanism and the auxiliary anti-swing assembly of the present invention;

[0031] Figure 8 For the present invention Figure 7Schematic diagram of the structure of A in the middle;

[0032] Figure 9 It is a partial structural diagram of the anti-swing mechanism of the present invention;

[0033] Figure 10 Schematic diagram of the baffle structure of the present invention.

[0034] Description of Figure Numbers:

[0035] 1. Cabin; 2. Baffle; 3. Anti-sway mechanism; 4. Auxiliary anti-sway assembly;

[0036] 21. Through hole 2; 22. Notch; 23. Reinforcement member;

[0037] 31. Guide rod; 32. Connecting frame; 33. L-shaped rod; 34. Anti-sway plate; 35. Hinge rod (1); 36. Stopper; 37. Damper (1); 331. Fixing block (1); 332. Fixing block (2); 333. Round rod; 341. Through hole (1); 361. Movable plate; 362. Hinge plate; 363. Damper (2); 364. Slideway opening;

[0038] 41. Air chamber; 42. Piston rod; 43. Air pipe; 44. Air bag; 45. Through port; 46. Sliding plate; 47. Hinge rod 2; 411. Sealing ring; 412. Piston plate.

[0039] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] See also Figures 1-10 The present invention proposes a cargo hold for a cryogenic liquid filling ship, comprising a cabin 1, a baffle 2 fixedly installed inside the cabin 1, and a plurality of baffles 2 are provided, and the plurality of baffles 2 are arranged in an equidistant array, a through-hole 21 is provided on the outer wall of the baffle 2, a notch 22 is provided on the top of the baffle 2, a reinforcement 23 is fixedly connected to the outer wall of the baffle 2, and the reinforcement 23 is fixedly installed in the cabin 1 and is used through the through-hole 21 to facilitate the passage of cryogenic liquid during flow and prevent the baffle 2 from being damaged by excessive pressure. The use of the notch 22 allows the violently oscillating cryogenic liquid to pass quickly, further protecting the baffle 2. The interior of the cabin 1 is provided with an anti-sway mechanism 3 and an auxiliary anti-sway component 4 for stopping the liquid from swaying.

[0042] In an embodiment of the present invention, in order to be able to stop the cryogenic liquid from oscillating violently, specifically, the anti-swing mechanism 3 includes a guide rod 31, an L-shaped rod 33 and a blocking member 36. The guide rod 31 is fixedly connected to the outer wall of the baffle 2, and a connecting frame 32 is fixedly connected to the outer wall of the guide rod 31. The L-shaped rod 33 is hinged to the outer wall of the connecting frame 32. The bottom of the L-shaped rod 33 is fixedly connected to the anti-swing plate 34. The end of the L-shaped rod 33 away from the connecting frame 32 is hinged to a hinged rod 35. The blocking member 36 is arranged at the hinged rod 35 away from the L-shaped rod. At one end of 33, a damper 37 is connected between the blocking member 36 and the connecting frame 32. When the cryogenic liquid violently oscillates and passes through the notch 22 of the baffle 2, the cryogenic liquid impacts the blocking member 36 and moves. Under the action of the damper 37 and the return spring, the oscillation of the cryogenic liquid is blocked for the first time. At the same time, during the movement of the blocking member 36 squeezing the return spring, the hinged rod 35 drives the L-shaped rod 33 to rotate, so that the anti-oscillation plate 34 moves in the direction of the cryogenic liquid oscillation, further stopping the cryogenic liquid from oscillating, thereby improving the anti-oscillation effect on the cryogenic liquid.

[0043] Furthermore, a through hole 341 is provided on the outer wall of the anti-swing plate 34, and the bottom of the anti-swing plate 34 is bent toward the side away from the auxiliary anti-swing component 4. The design of the through hole 341 enables the cryogenic liquid to pass through the anti-swing plate 34, thereby preventing the cryogenic liquid from having an excessive impact on the anti-swing plate 34 and causing damage to the anti-swing plate 34. In addition, the bending part of the anti-swing plate 34 can slow down the flow speed of the cryogenic liquid and improve the anti-swing effect.

[0044] Furthermore, the blocking member 36 is composed of a movable plate 361, a hinged plate 362 and a damper 2 363. The movable plate 361 is fixed to the damper 1 37. The movable plate 361 and the connecting frame 32 are elastically connected by a return spring. The movable plate 361 and the hinged plate 362 are elastically connected by an arc spring. The two ends of the damper 2 363 are fixedly connected to the movable plate 361 and the hinged plate 362 respectively. A sliding groove opening 364 is provided on the outer wall of the movable plate 361. The sliding groove opening 364 matches the guide rod 31. Through the use of the sliding groove opening 364 and the guide rod 31, the movable plate 361 can remain stable during movement. When the cryogenic liquid vibrates and impacts the hinged plate 362, the arc spring and the damper 2 363 can buffer the impact of the cryogenic liquid, thereby protecting the hinged plate 362 and the movable plate 361.

[0045] Furthermore, multiple groups of anti-sway mechanisms 3 are provided, and each group of anti-sway mechanisms 3 is arranged between two groups of baffles 2. Each group of anti-sway mechanisms 3 has two groups of L-shaped rods 33, anti-sway plates 34, hinged rods 35, and blocking members 36, and are symmetrically arranged with respect to the center line of the connecting frame 32. The multiple groups of anti-sway mechanisms 3 enable the cryogenic liquid to be stopped multiple times during the process of shock and vibration. This multi-stage anti-sway structure weakens the liquid sloshing energy layer by layer. Compared with the traditional anti-sloshing method, it can more effectively cope with large-scale liquid shocks and reduce the impact force of the liquid on the bulkhead.

[0046] In the embodiment of the present invention, in order to further improve the anti-swing effect of the cryogenic liquid oscillation, specifically, a fixed block 331 and a fixed block 332 are fixedly connected to the outer wall of the L-shaped rod 33, and a round rod 333 is fixedly connected between the fixed block 331 and the fixed block 332. The auxiliary anti-swing component 4 includes an air chamber 41, which is fixedly connected to the top of the anti-swing plate 34. The air chamber 41 is penetrated by the piston rod 42 and is slidably connected to the piston rod 42. A sealing ring 411 is provided in the air chamber 41 to strengthen the activity. The sealing performance of the plug rod 42 when sliding, a piston plate 412 is slidably connected in the air chamber 41, the piston plate 412 is fixed to the piston rod 42, the air chamber 41 is connected to the air pipe 43, the end of the air pipe 43 away from the air chamber 41 is connected to the air bag 44, the end of the piston rod 42 away from the air chamber 41 is fixedly connected to the sliding plate 46, the side of the sliding plate 46 away from the piston rod 42 is hinged to the hinge rod 2 47, the end of the hinge rod 2 47 away from the sliding plate 46 is hinged to the lower side of the connecting frame 32, and a through hole 45 is opened on the outer wall of the air bag 44. The through-port 45 matches the through-hole 1 341, and the sliding plate 46 is penetrated by the round rod 333 and is slidably connected with the round rod 333. When the movable plate 361 moves in the direction close to the connecting frame 32, the hinge rod 1 35 drives the L-shaped rod 33 to rotate, and the hinge rod 2 47 pulls the sliding plate 46 to slide upward. When the hinge rod 1 35 pushes the L-shaped rod 33 to rotate around the hinge point between it and the connecting frame 32, the anti-sway plate 34 is driven to rotate. Under the action of the hinge rod 2 47, the sliding plate 46 moves, driving the piston rod 4 2 moves upward, thereby driving the piston plate 412 to move. The piston plate 412 squeezes the gas in the gas chamber 41 into the air bag 44, causing the air bag 44 to expand. During the expansion of the air bag 44, the opening 45 provided therein will gradually decrease, reducing the passing speed of the cryogenic liquid, causing the cryogenic liquid to move toward the direction of the anti-sway plate 34 close to the inner wall of the cargo hold, further improving the anti-sway effect of the cryogenic liquid. The multiple protection design reduces the risk of damage to key components of the cargo hold and extends the service life of the cabin body 1 and the anti-sway mechanism 3.

[0047] Furthermore, when the deep-sea liquid stops oscillating, under the action of the reset spring, the blocking member 36 can be driven to reset, and then the moving plate 361 drives the hinged rod 1 35 to move, so that the L-shaped rod 33 rotates and resets, and then under the action of the hinged rod 2 47, the sliding plate 46 slides stably on the round rod 333. In the process of the sliding plate 46 sliding downward, the piston plate 412 is driven to descend, so that the gas after the expansion of the airbag 44 can be squeezed into the air tank 41 by the pressure of the deep-sea liquid.

[0048] During use, when the cryogenic liquid violently oscillates through the notch 22 of the baffle 2, the cryogenic liquid impacts the blocking member 36 and moves. Under the action of the damper 1 37 and the return spring, the oscillation of the cryogenic liquid is first blocked. At the same time, when the blocking member 36 squeezes the return spring, the hinged rod 1 35 drives the L-shaped rod 33 to rotate, causing the anti-oscillation plate 34 to move in the direction of the cryogenic liquid oscillation, further stopping the oscillation of the cryogenic liquid.

[0049] At the same time, when the cryogenic liquid oscillates and hits the hinged plate 362, the arc spring and the damper 2 363 can buffer the impact of the cryogenic liquid, thereby protecting the hinged plate 362 and the movable plate 361. In the process of the movable plate 361 compressing the reset spring, the hinged rod 1 35 pushes the L-shaped rod 33 to rotate around the hinge point with the connecting frame 32, driving the anti-sway plate 34 to rotate. Under the action of the hinged rod 2 47, the sliding plate 46 moves, driving the piston rod 42 to move upward, squeezing the gas in the air chamber 41 into the air bag 44, causing the air bag 44 to expand. In the process of the air bag 44 expanding, the opening 45 provided therein will gradually decrease, reducing the passage speed of the cryogenic liquid, causing the cryogenic liquid to move toward the anti-sway plate 34 close to the inner wall of the cargo hold, thereby strengthening the anti-sway of the cryogenic liquid.

[0050] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cargo hold for a cryogenic liquid filling ship, comprising a cabin (1), wherein a baffle (2) is fixedly installed inside the cabin (1), and the baffles (2) are provided in a plurality of groups, and the plurality of groups of baffles (2) are arranged in an equidistant array, characterized in that: The interior of the cabin (1) is provided with a sway-stopping mechanism (3) and an auxiliary sway-stopping component (4) for stopping the swaying of the liquid. The sway-stopping mechanism (3) comprises: A guide rod (31), the guide rod (31) is fixedly connected to the outer wall of the baffle (2), and a connecting frame (32) is fixedly connected to the outer wall of the guide rod (31); An L-shaped rod (33), the L-shaped rod (33) is hinged on the outer wall of the connecting frame (32), the bottom of the L-shaped rod (33) is fixedly connected to a swing-stop plate (34), and one end of the L-shaped rod (33) away from the connecting frame (32) is hinged to a hinge rod (35); A blocking member (36), the blocking member (36) being arranged at one end of the hinged rod (35) away from the L-shaped rod (33), and a damper (37) being connected between the blocking member (36) and the connecting frame (32); The blocking member (36) is composed of a movable plate (361), a hinged plate (362) and a second damper (363). The movable plate (361) is fixed to the first damper (37). The movable plate (361) is elastically connected to the connecting frame (32) via a return spring. The movable plate (361) is elastically connected to the hinged plate (362) via an arc spring. The two ends of the second damper (363) are respectively fixedly connected to the movable plate (361) and the hinged plate (362). A sliding groove (364) is provided on the outer wall of the movable plate (361). The sliding groove (364) matches the guide rod (31).

2. A cryogenic liquid filling ship cargo hold according to claim 1, characterized in that: The anti-sway mechanism (3) is provided with multiple groups, and each group of the anti-sway mechanism (3) is arranged between two groups of baffles (2). Each group of the anti-sway mechanism (3) includes two groups of L-shaped rods (33), anti-sway plates (34), hinged rods (35), and blocking members (36), and is symmetrically arranged about the center line of the connecting frame (32).

3. The cryogenic liquid filling ship cargo hold according to claim 1, characterized in that: A fixing block 1 (331) and a fixing block 2 (332) are fixedly connected on the outer wall of the L-shaped rod (33), and a round rod (333) is fixedly connected between the fixing block 1 (331) and the fixing block 2 (332).

4. The cryogenic liquid filling ship cargo hold according to claim 3, characterized in that: A through hole (341) is provided on the outer wall of the anti-swing plate (34), and the bottom of the anti-swing plate (34) is bent toward a side away from the auxiliary anti-swing component (4).

5. The cryogenic liquid filling ship cargo hold according to claim 4, characterized in that: The auxiliary anti-sway component (4) includes an air chamber (41), the air chamber (41) is fixedly connected to the top of the anti-sway plate (34), the air chamber (41) is penetrated by the piston rod (42) and is slidably connected to the piston rod (42), the air chamber (41) is connected to an air pipe (43), the end of the air pipe (43) away from the air chamber (41) is connected to an air bag (44), the end of the piston rod (42) away from the air chamber (41) is fixedly connected to a sliding plate (46), the side of the sliding plate (46) away from the piston rod (42) is hinged to a hinged rod 2 (47), and the end of the hinged rod 2 (47) away from the sliding plate (46) is hinged to the lower side of the connecting frame (32).

6. The cryogenic liquid filling ship cargo hold according to claim 5, characterized in that: A through opening (45) is provided on the outer wall of the air bag (44), and the through opening (45) matches the through hole 1 (341). The sliding plate (46) is penetrated by the round rod (333) and is slidably connected to the round rod (333).

7. The cryogenic liquid filling ship cargo hold according to claim 5, characterized in that: A sealing ring (411) is provided in the gas chamber (41) for enhancing the sealing performance of the piston rod (42) when it slides. A piston plate (412) is slidably connected to the gas chamber (41), and the piston plate (412) is fixed to the piston rod (42).

8. The cryogenic liquid filling ship cargo hold according to claim 5, characterized in that: When the movable plate (361) moves toward the direction approaching the connecting frame (32), the hinge rod (35) drives the L-shaped rod (33) to rotate, and the hinge rod (47) pulls the sliding plate (46) to slide upward.

9. The cryogenic liquid filling ship cargo hold according to claim 1, characterized in that: A second through hole (21) is provided on the outer wall of the baffle (2), a notch (22) is provided on the top of the baffle (2), a reinforcement member (23) is fixedly connected to the outer wall of the baffle (2), and the reinforcement member (23) is fixedly installed in the cabin (1).

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