Marine low-pressure carbon dioxide filling system and car carrier

Abstract

The present invention relates to the technical field of ship and marine engineering design and manufacturing, and in particular to a low-pressure carbon dioxide filling system for ships, comprising an exhaust pipe, a branch, an exhaust gas compressor unit, a first valve, a second valve, a primary heat exchanger, a third valve, a fourth valve, a secondary heat exchanger, a fifth valve, a gas-liquid separator, a sixth valve, and a low-pressure CO storage tank. The branch is opened to allow exhaust gas in the exhaust pipe to enter the exhaust gas compressor unit. Exhaust gas compression can greatly reduce the pipe diameter. The exhaust gas enters the primary heat exchanger through the first valve and the second valve. In the primary heat exchanger, liquid LNG cools the exhaust gas. Water vapor in the exhaust gas is cooled and filtered out through temperature control. The remaining exhaust gas then passes through the third valve and the fourth valve and enters the secondary heat exchanger. The gaseous carbon dioxide is cooled into a liquid state. The nitrogen in the remaining exhaust gas has a liquefaction temperature lower than that of liquid LNG and cannot be liquefied. After passing through the fifth valve, it is separated by the gas-liquid separator. The final liquid carbon dioxide passes through the sixth valve and enters the low-pressure carbon dioxide storage tank for storage.

Description

Technical Field

[0001] The present invention relates to the technical field of ship and ocean engineering design and manufacturing, in particular to a ship-based low-pressure carbon dioxide filling system and a car carrier. Background Art

[0002] A car carrier is a ship designed to transport unpackaged cars. These cars are driven on and off a ramp and placed on a special deck. They are mainly used for the sea transportation of cars, especially in multinational car trade and the global supply chain of automobile manufacturers.

[0003] Carbon dioxide fire extinguishing systems are divided into high-pressure systems and low-pressure systems. The carbon dioxide in the high-pressure system is stored in high-pressure gas cylinders, and the low-pressure carbon dioxide is stored in cans in liquid form. For large ships, the high-pressure carbon dioxide fire extinguishing system has many bottles, is heavy, and takes up a lot of space, so low-pressure carbon dioxide is generally used. The filling of low-pressure carbon dioxide is generally the responsibility of the shipyard, including the subsequent replenishment after operation, which also requires finding a professional company to fill it at the dock, which is both costly and troublesome.

[0004] Based on the deficiencies of existing technologies, the present invention designs a low-pressure carbon dioxide filling system for ships and a car transport ship. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a low-pressure carbon dioxide filling system for ships and a car carrier, which has the advantages of reducing the filling cost of the low-pressure carbon dioxide fire extinguishing system of ships, thereby improving the design and construction advantages of similar ship types.

[0006] The present invention provides the following technical solution: a marine low-pressure carbon dioxide filling system, comprising an exhaust pipe, a branch, an exhaust gas compressor unit, a first valve, a second valve, a first-level heat exchanger, a third valve, a fourth valve, a second-level heat exchanger, a fifth valve, a gas-liquid separator, a sixth valve, and a low-pressure carbon dioxide storage tank. The exhaust pipe outlet is connected to the exhaust gas compressor unit through a pipeline, one end of the branch is connected to the exhaust gas compressor unit through a pipeline, the exhaust gas compressor unit and the second valve are connected to the first valve and the second valve through a pipeline, the first-level heat exchanger is connected to the third valve and the fourth valve through a pipeline, one end of the fourth valve is connected to the second-level heat exchanger through a pipeline, liquid LNG pipelines are passed through the first-level heat exchanger and the second-level heat exchanger, the second-level heat exchanger is connected to the fifth valve through a pipeline, one end of the fifth valve is connected to the gas-liquid separator through a pipeline, the gas-liquid separator is connected to the sixth valve through a pipeline, and one end of the sixth valve is connected to the low-pressure carbon dioxide storage tank through a pipeline.

[0007] As a preferred technical solution of the present invention, it also includes a hull, and platform structures are provided on both sides of the outer surface of the hull. The platform structure includes a protruding platform, and five empty slots are opened on the top of the protruding platform.

[0008] As a preferred technical solution of the present invention, supporting side blocks are provided on both sides of the top of the protruding platform, and a speed reducer unit is installed on one side of one of the supporting side blocks.

[0009] As a preferred technical solution of the present invention, a long transmission rod is installed at one end of the output shaft of the reducer group, one end of the long transmission rod is rotatably connected to another supporting side block, and ten first bevel gears are installed on the outer surface of the long transmission rod, and every two of the first bevel gears form a group.

[0010] As a preferred technical solution of the present invention, five supporting vertical blocks are installed on the top of the protruding platform, and a second bevel gear is rotatably installed on the right side of the five supporting vertical blocks, and the outer surface of the second bevel gear is engaged with the first bevel gear. A third bevel gear is rotatably installed on the left side of the five supporting vertical blocks, and the five third bevel gears are fixedly connected to the five second bevel gears.

[0011] As a preferred technical solution of the present invention, five buffer structures are installed on the top of the protruding platform, and the five buffer structures are arranged on both sides of the five empty slots.

[0012] As a preferred technical solution of the present invention, the five buffer structures include two fixed shafts, threaded rods are rotatably installed inside the two fixed shafts, fourth bevel gears are fixedly installed on the outer surfaces of the two threaded rods, and the two fourth bevel gears are meshed with corresponding third bevel gears.

[0013] As a preferred technical solution of the present invention, threaded sleeves are threadedly installed on the outer surfaces of the two threaded rods, and a connecting rod is installed between the two threaded sleeves.

[0014] As a preferred technical solution of the present invention, two vertical rods are installed at the bottom of the connecting rod, a first rubber barrel is rotatably installed between the two vertical rods, an extension rod is installed on one side of the two vertical rods, and a second rubber barrel is rotatably installed between the two extension rods.

[0015] As a preferred technical solution of the present invention, a loading and unloading lane is provided on the top of the deck of the hull, and a docking groove is provided on one side of the deck of the hull.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The ship's low-pressure carbon dioxide filling system and car carrier open a branch line to allow the exhaust gas inside the exhaust pipe to enter the exhaust gas compressor unit. The exhaust gas compression can greatly reduce the pipe diameter. The compressed exhaust gas passes through the first and second valves into the first-stage heat exchanger. In the first-stage heat exchanger, liquid LNG cools the exhaust gas. Through temperature control, the water vapor in the exhaust gas is cooled and filtered out. The remaining exhaust gas then passes through the third and fourth valves and enters the second-stage heat exchanger, where the gaseous carbon dioxide is cooled into liquid. The nitrogen in the remaining exhaust gas cannot be liquefied because its liquefaction temperature is lower than that of liquid LNG. After passing through the fifth valve, it is separated by the gas-liquid separator. The final liquid carbon dioxide passes through the sixth valve and enters the low-pressure carbon dioxide storage tank for storage. This system fully utilizes the existing equipment on board to generate the required liquid carbon dioxide, thereby reducing the shipyard's carbon dioxide filling costs and the rehydration costs after operation. This achieves the purpose of reducing the filling cost of the ship's low-pressure carbon dioxide fire extinguishing system, thereby improving the design and construction advantages of similar ship types.

[0018] 2. The low-pressure carbon dioxide filling system for ships and the car transport ship, through the platform structure and the buffer structure, when the transport ship is preparing to dock, the output shaft of the reduction unit drives the long transmission rod to rotate, thereby driving the five groups of first bevel gears to rotate, thereby causing the second bevel gear and the third bevel gear to drive the fourth bevel gear to rotate, thereby allowing the two threaded sleeves to drive the connecting rod to move horizontally on the threaded rod, thereby driving the five groups of vertical rods and the second rubber barrel to move to a position below the hull, at which time the impact generated when the ship docks can be buffered. When the car loading and unloading is completed and the hull leaves the dock, in order to prevent the first and second rubber barrels from increasing the contact area between the hull and the water flow, thereby increasing the resistance during navigation, the five groups of buffer structures are reset by flipping the reduction unit, so that the first rubber barrel and the extension rod are out of the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the low-pressure carbon dioxide filling system of the present invention;

[0020] Figure 2 Schematic diagram of the platform structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the loading and unloading lane structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the speed reducer unit of the present invention;

[0023] Figure 5 This is a schematic structural diagram of the first bevel gear of the present invention;

[0024] Figure 6 Schematic diagram of the buffer structure of the present invention.

[0025] In the figure: 1. branch line; 2. exhaust gas compressor unit; 3. first valve; 4. second valve; 5. primary heat exchanger; 6. third valve; 7. fourth valve; 8. secondary heat exchanger; 9. fifth valve; 10. gas-liquid separator; 11. sixth valve; 12. low-pressure carbon dioxide storage tank; 13. platform structure; 131. protruding platform; 132. empty slot; 133. supporting side block; 134. speed reducer unit; 135. long transmission rod; 136. first bevel gear; 137. supporting vertical block; 138. second bevel gear; 139. third bevel gear; 14. buffer structure; 141. fixed shaft; 142. threaded rod; 143. fourth bevel gear; 144. threaded sleeve block; 145. connecting rod; 146. vertical rod; 147. first rubber barrel; 148. extension rod; 149. second rubber barrel; 15. loading and unloading lane; 16. docking trough. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-6 , a marine low-pressure carbon dioxide filling system includes an exhaust pipe, a branch 1, an exhaust gas compressor unit 2, a first valve 3, a second valve 4, a first-level heat exchanger 5, a third valve 6, a fourth valve 7, a second-level heat exchanger 8, a fifth valve 9, a gas-liquid separator 10, a sixth valve 11, and a low-pressure carbon dioxide storage tank 12. The exhaust pipe outlet is connected to the exhaust gas compressor unit 2 through a pipeline, one end of the branch 1 is connected to the exhaust gas compressor unit 2 through a pipeline, the exhaust gas compressor unit 2 and the second valve 4 are connected to the first valve 3 and the second valve 4 through a pipeline, the first-level heat exchanger 5 is connected to the third valve 6 and the fourth valve 7 through a pipeline, one end of the fourth valve 7 is connected to the second-level heat exchanger 8 through a pipeline, a liquid LNG pipeline is passed through the first-level heat exchanger 5 and the second-level heat exchanger 8, the second-level heat exchanger 8 is connected to the fifth valve 9 through a pipeline, one end of the fifth valve 9 is connected to the gas-liquid separator 10 through a pipeline, the gas-liquid separator 10 is connected to the sixth valve 11 through a pipeline, and one end of the sixth valve 11 is connected to the low-pressure carbon dioxide storage tank 12 through a pipeline.

[0028] See also Figure 4-5The hull also includes a platform structure 13 disposed on both sides of its outer surface. The platform structure 13 comprises a protruding platform 131, with five slots 132 defined on its top. Support side blocks 133 are disposed on both sides of the top of the protruding platform 131, with a speed reducer 134 mounted on one side of one of the support side blocks 133. A long transmission rod 135 is mounted on one end of the output shaft of the speed reducer 134, one end of which is rotatably connected to another support side block 133. Ten first bevel gears 136 are mounted on the outer surface of the long transmission rod 135, with each pair of first bevel gears 136 forming a group. Five vertical support blocks 137 are mounted on the top of the protruding platform 131. Second bevel gears 138 are rotatably mounted on the right sides of the five vertical support blocks 137, with the outer surfaces of the second bevel gears 138 meshing with the first bevel gears 136. Third bevel gears 139 are rotatably mounted on the left sides of the five vertical support blocks 137, and the five third bevel gears 139 are fixedly connected to the five second bevel gears 138. A loading and unloading lane 15 is provided on the top of the deck of the hull, and a docking groove 16 is provided on one side of the deck of the hull.

[0029] The output shaft of the speed reducer 134 drives the long transmission rod 135 to rotate, thereby driving the five sets of first bevel gears 136 to rotate, and then the second bevel gear 138 and the third bevel gear 139 drive the fourth bevel gear 143 to rotate, thereby allowing the two threaded sleeves 144 to drive the connecting rod 145 to move horizontally on the threaded rod 142.

[0030] See also Figure 4-6 Five buffer structures 14 are installed on the top of the protruding platform 131, and the five buffer structures 14 are arranged on both sides of the five empty slots 132. The five buffer structures 14 include two fixed shafts 141, and threaded rods 142 are rotatably installed inside the two fixed shafts 141. The outer surfaces of the two threaded rods 142 are fixedly installed with fourth bevel gears 143, and the two fourth bevel gears 143 are meshed with the corresponding third bevel gears 139. Threaded sleeves 144 are threadedly installed on the outer surfaces of the two threaded rods 142, and a connecting rod 145 is installed between the two threaded sleeves 144. Two vertical rods 146 are installed at the bottom of the connecting rod 145, and a first rubber barrel 147 is rotatably installed between the two vertical rods 146. An extension rod 148 is installed on one side of the two vertical rods 146, and a second rubber barrel 149 is rotatably installed between the two extension rods 148.

[0031] The five groups of vertical rods 146 and the second rubber barrel 149 are moved to a position below the hull to cushion the impact generated when the ship docks. When the car loading and unloading is completed and the hull leaves the dock, in order to prevent the first rubber barrel 147 and the second rubber barrel 149 from increasing the contact area between the hull and the water flow, thereby increasing the resistance during navigation, the five groups of buffer structures 14 are reset by flipping the speed reducer group 134, so that the first rubber barrel 147 and the extension rod 148 are out of the water.

[0032] Working principle: when the marine low-pressure carbon dioxide filling system and the car carrier are in use, in the initial state, first open the branch 1 to allow the exhaust gas inside the exhaust pipe to enter the exhaust gas compressor unit 2. The exhaust gas compression can greatly reduce the pipe diameter, and the compressed exhaust gas passes through the first valve 3 and the second valve 4 into the first-stage heat exchanger 5. In the first-stage heat exchanger 5, the liquid LNG cools the exhaust gas, and through temperature control, the water vapor in the exhaust gas is cooled and filtered out. Then the remaining exhaust gas passes through the third valve 6 and the fourth valve 7 into the second-stage heat exchanger 8, so that the gaseous carbon dioxide is cooled into liquid. Finally, the nitrogen in the remaining exhaust gas cannot be liquefied because its liquefaction temperature is lower than that of liquid LNG. After passing through the fifth valve 9, it is separated by the gas-liquid separator 10, and the final liquid carbon dioxide passes through the sixth valve 11 into the low-pressure carbon dioxide storage tank 12 for storage. This system makes full use of the existing equipment on board to generate the required liquid carbon dioxide, thereby reducing The carbon dioxide filling costs of the shipyard and the rehydration costs after operation are reduced. When the transport ship is ready to dock, the output shaft of the speed reducer 134 drives the long transmission rod 135 to rotate, thereby driving the five groups of first bevel gears 136 to rotate, thereby causing the second bevel gear 138 and the third bevel gear 139 to drive the fourth bevel gear 143 to rotate, thereby allowing the two threaded sleeves 144 to drive the connecting rod 145 to move horizontally on the threaded rod 142, thereby driving the five groups of vertical rods 146 and the second rubber barrel 149 to move to the position below the hull, at which time the impact generated when the ship docks can be cushioned. When the car is loaded and unloaded and the hull leaves the dock, in order to avoid the first rubber barrel 147 and the second rubber barrel 149 increasing the contact area between the hull and the water flow, thereby increasing the resistance during navigation, the speed reducer 134 is flipped to reset the five groups of buffer structures 14 and make the first rubber barrel 147 and the extension rod 148 leave the water surface.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A car carrier, comprising a low-pressure carbon dioxide filling system for use on board and a hull, characterized in that: The marine low-pressure carbon dioxide filling system comprises an exhaust pipe, a branch (1), an exhaust gas compressor unit (2), a first valve (3), a second valve (4), a primary heat exchanger (5), a third valve (6), a fourth valve (7), a secondary heat exchanger (8), a fifth valve (9), a gas-liquid separator (10), a sixth valve (11), and a low-pressure carbon dioxide storage tank (12), and is characterized in that: the exhaust pipe outlet is connected to the exhaust gas compressor unit (2) through a pipeline, one end of the branch (1) is connected to the exhaust gas compressor unit (2) through a pipeline, the exhaust gas compressor unit (2) and the second valve (4) are connected through a pipeline and the first valve (3), The first-stage heat exchanger (5) is connected to the second valve (4), the first-stage heat exchanger (5) is connected to the third valve (6) and the fourth valve (7) through a pipeline, one end of the fourth valve (7) is connected to the second-stage heat exchanger (8) through a pipeline, a liquid LNG pipeline is passed through the first-stage heat exchanger (5) and the second-stage heat exchanger (8), the second-stage heat exchanger (8) is connected to the fifth valve (9) through a pipeline, one end of the fifth valve (9) is connected to the gas-liquid separator (10) through a pipeline, the gas-liquid separator (10) is connected to the sixth valve (11) through a pipeline, and one end of the sixth valve (11) is connected to the low-pressure carbon dioxide storage tank (12) through a pipeline; Platform structures (13) are provided on both sides of the outer surface of the hull, and the platform structure (13) includes a protruding platform (131), and five empty slots (132) are opened on the top of the protruding platform (131); Support side blocks (133) are provided on both sides of the top of the protruding platform (131), and a speed reducer unit (134) is installed on one side of one of the support side blocks (133); A long transmission rod (135) is mounted on one end of the output shaft of the speed reducer assembly (134), one end of the long transmission rod (135) is rotatably connected to the other supporting side block (133), and ten first bevel gears (136) are mounted on the outer surface of the long transmission rod (135), with every two first bevel gears (136) forming a group; Five supporting vertical blocks (137) are installed on the top of the protruding platform (131), and a second bevel gear (138) is rotatably installed on the right side of the five supporting vertical blocks (137), and the outer surface of the second bevel gear (138) is meshed with the first bevel gear (136). A third bevel gear (139) is rotatably installed on the left side of the five supporting vertical blocks (137), and the five third bevel gears (139) are fixedly connected to the five second bevel gears (138); Five buffer structures (14) are installed on the top of the protruding platform (131), and the five buffer structures (14) are arranged on both sides of the five empty slots (132); The five buffer structures (14) include two fixed shafts (141), threaded rods (142) are rotatably mounted inside the two fixed shafts (141), fourth bevel gears (143) are fixedly mounted on the outer surfaces of the two threaded rods (142), and the two fourth bevel gears (143) are meshed with corresponding third bevel gears (139); The outer surfaces of the two threaded rods (142) are threadedly mounted with threaded sleeves (144), and a connecting rod (145) is mounted between the two threaded sleeves (144); Two vertical rods (146) are installed at the bottom of the connecting rod (145), a first rubber barrel (147) is rotatably installed between the two vertical rods (146), an extension rod (148) is installed on one side of the two vertical rods (146), and a second rubber barrel (149) is rotatably installed between the two extension rods (148).

2. The car carrier according to claim 1, characterized in that: A loading and unloading lane (15) is provided on the top of the deck of the hull, and a docking groove (16) is provided on one side of the deck of the hull.

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