LNG (Liquefied Natural Gas) cold energy ice maker

Abstract

The utility model discloses an LNG (Liquefied Natural Gas) cold energy ice maker which comprises an LNG gasification system, a refrigerant ice making system, an ice melting system, an ice block lifting system, a hydraulic oil cylinder pushing system, a gradient-adjustable conveying belt system and an ice maker structure frame, the LNG gasification system, the refrigerant ice-making system, the ice melting system, the ice block lifting system and the hydraulic oil cylinder pushing system are all arranged in the ice-making machine structural framework, and the gradient-adjustable conveying belt system is arranged at one end outside the ice-making machine structural framework. Cold energy in the LNG gasification process is secondarily recycled, so that the ice making process is more energy-saving and faster, the angle-adjustable conveying belt system can adapt to vehicles of various sizes, ice blocks are more convenient to load and unload, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of LNG cold energy utilization, in particular to an LNG cold energy ice maker. Background Technique

[0002] In recent years, some cities have successively built LNG gasification stations as urban gas sources to supply natural gas to users. LNG is usually stored in a storage tank in the form of a cryogenic liquid at about -162°C. Before being supplied to users, LNG needs to be reheated and gasified again. During this process, a large amount of cryogenic cold energy is released. Recycling this part of cold energy has considerable economic and social benefits.

[0003] The existing large-scale LNG cold energy ice makers have the following problems: The structures of various components are relatively scattered, occupying a large amount of space and having relatively high requirements for the site. And currently, after the ice is demolded from the LNG cold energy ice maker, the ice cubes still need to be transported to a vehicle, which is rather inconvenient. At the same time, by directly exchanging heat between LNG and the ice mold, each time the water exchanges heat from room temperature, resulting in a decrease in heat exchange efficiency and being not energy-saving enough. Therefore, an improved technology is urgently needed to solve this problem existing in the prior art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an LNG cold energy ice maker to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An LNG cold energy ice maker, including an LNG gasification system, a refrigerant ice-making system, an ice melting system, an ice cube lifting system, a hydraulic cylinder pushing system, a slope-adjustable conveyor belt system and an ice maker structure frame. The LNG gasification system, the refrigerant ice-making system, the ice melting system, the ice cube lifting system and the hydraulic cylinder pushing system are all arranged inside the ice maker structure frame, and the slope-adjustable conveyor belt system is arranged at one end outside the ice maker structure frame;

[0006] The LNG gasification system includes a liquefied natural gas inlet pipe, a heat exchanger and a natural gas return pipe. The liquefied natural gas inlet pipe and the natural gas return pipe are arranged on the upper surface of the heat exchanger, and the liquefied natural gas inlet pipe and the natural gas return pipe are communicated with each other;

[0007] The refrigerant ice-making system includes a refrigerant storage tank, a refrigerant cold-taking circulation pipeline, a refrigerant ice-making circulation pipeline and an ice mold. The two ends of the refrigerant storage tank are respectively connected with the refrigerant cold-taking circulation pipeline and the refrigerant ice-making circulation pipeline. The refrigerant storage tank is connected with the heat exchanger through the refrigerant cold-taking circulation pipeline, and the refrigerant storage tank is connected with the ice mold through the refrigerant ice-making circulation pipeline;

[0008] The ice melting system includes a tap water tank, an ice melting circulation pipeline and a tap water pipe. The tap water tank is arranged at the lower part of the ice maker structure frame. The tap water tank is respectively provided with an ice melting circulation pipeline and a tap water pipe. The tap water tank is connected to the heat exchange pipeline of the ice mold through the ice melting circulation pipeline, and the tap water tank is connected to the ice mold through the tap water pipe;

[0009] The ice block lifting system includes a screw rod, an ice block lifting platform, a double-shaft motor and a speed reducer. The double-shaft motor is arranged above one end of the ice maker structure frame close to the slope-adjustable conveyor belt system. Both ends of the double-shaft motor are respectively connected to the speed reducer. The output shaft of the speed reducer is matched with the screw rod through a worm and worm gear. The screw rod is arranged on both sides of the ice maker structure frame, and the bottom of the screw rod is rotatably connected to both ends of the ice block lifting platform;

[0010] The hydraulic cylinder pushing system includes a first hydraulic cylinder, a ice pushing frame and a limit guide rail. The first hydraulic cylinder is arranged in the ice maker structure frame and faces the ice block lifting system. The piston rod of the first hydraulic cylinder is installed with a ice pushing frame. There are several limit guide rails and they are arranged on both sides of the ice maker structure frame through columns. Both sides of the ice pushing frame are matched with the limit guide rails;

[0011] The slope-adjustable conveyor belt system includes a conveyor belt and a second hydraulic cylinder. The conveyor belt is rotatably arranged on one end of the ice maker structure frame through a support frame. The second hydraulic cylinder is rotatably arranged on the upper surface of the support frame. Both sides of the conveyor belt are respectively connected to both ends of a U-shaped frame. The piston rod of the second hydraulic cylinder is connected to the middle position of the U-shaped frame.

[0012] Preferably, for an LNG cold energy ice maker provided by the present utility model, a first refrigerant circulation pump is installed on the refrigerant cooling circulation pipeline.

[0013] Preferably, for an LNG cold energy ice maker provided by the present utility model, a second refrigerant circulation pump is installed on the refrigerant ice making circulation pipeline.

[0014] Preferably, for an LNG cold energy ice maker provided by the present utility model, an ice melting circulation pump is installed on the ice melting circulation pipeline.

[0015] Preferably, for an LNG cold energy ice maker provided by the present utility model, a water supply pump is installed on the tap water pipe.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] (1) During installation, the refrigerant ice-making system, ice-melting system, ice lifting system, and hydraulic cylinder pushing system are all integrated within the ice-making machine's structural framework. The angle-adjustable conveyor belt system is installed at one end of the ice-making machine's structural framework. The integrated LNG cold energy ice-making machine occupies less floor space and is more convenient and faster to install and use.

[0018] (2) By recycling the cold energy during the LNG gasification process for the second time, the ice-making process becomes more energy-efficient and faster. That is, through the low-temperature refrigerant cycle, the cold energy generated during the LNG gasification process can be efficiently recovered, and this part of the cold energy is used for ice production. This ice-making machine has good energy-saving effects and high ice-making efficiency.

[0019] (3) Through the angle-adjustable conveyor belt system, various sizes of vehicles can be accommodated, making ice loading and unloading more convenient, time-saving, and labor-saving. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is an Figure 1 schematic structural diagram of the angle transformation;

[0022] Figure 3 is a schematic structural diagram of the part of the present utility model located in the ice-making machine's structural framework;

[0023] Figure 4 is a schematic side view structural diagram of the present utility model;

[0024] Figure 5 is a schematic top view structural diagram of the present utility model.

[0025] In the figure: liquefied natural gas inlet pipe 1, heat exchanger 2, natural gas return pipe 3, refrigerant storage tank 4, refrigerant cold energy extraction circulation pipeline 5, refrigerant ice-making circulation pipeline 6, ice mold 7, first refrigerant circulation pump 8, second refrigerant circulation pump 9, tap water tank 10, ice-melting circulation pipeline 11, ice-melting circulation pump 12, water supply pump 13, tap water pipe 14, screw 15, ice-making machine structural framework 16, ice lifting platform 17, double-shaft motor 18, speed reducer 19, worm and worm gear 20, first hydraulic oil pump 21, ice pushing frame 22, sliding guide rail 23, conveyor belt 24, second hydraulic oil pump 25, support frame 26, U-shaped frame 27. Detailed Embodiments

[0026] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model;

[0027] It should be noted that in the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0028] Please refer to Figures 1-5 , the present utility model provides a technical solution: an LNG cold energy ice maker, including an LNG gasification system, a refrigerant ice making system, an ice melting system, an ice block lifting system, a hydraulic cylinder pushing system, a slope adjustable conveyor belt system, and an ice maker structure frame 16. The LNG gasification system, the refrigerant ice making system, the ice melting system, the ice block lifting system, and the hydraulic cylinder pushing system are all arranged inside the ice maker structure frame 16, and the slope adjustable conveyor belt system is arranged at one end outside the ice maker structure frame 16;

[0029] The LNG gasification system includes a liquefied natural gas inlet pipe 1, a heat exchanger 2, and a natural gas return pipe 3. The liquefied natural gas inlet pipe 1 and the natural gas return pipe 3 are arranged on the upper surface of the heat exchanger 2, and the liquefied natural gas inlet pipe 1 and the natural gas return pipe 3 are interconnected;

[0030] The refrigerant ice making system includes a refrigerant storage tank 4, a refrigerant cooling circulation pipeline 5, a refrigerant ice making circulation pipeline 6, and an ice mold 7. The two ends of the refrigerant storage tank 4 are respectively connected with the refrigerant cooling circulation pipeline 5 and the refrigerant ice making circulation pipeline 6. The refrigerant storage tank 4 is connected to the heat exchanger 2 through the refrigerant cooling circulation pipeline 5. The refrigerant cooling circulation pipeline 5 is equipped with a first refrigerant circulation pump 8 to provide power when extracting the refrigerant. The refrigerant storage tank 4 is connected to the ice mold 7 through the refrigerant ice making circulation pipeline 6. The refrigerant ice making circulation pipeline 6 is equipped with a second refrigerant circulation pump 9 to provide power between the refrigerant and the ice mold 7;

[0031] The ice melting system includes a tap water tank 10, an ice melting circulation pipeline 11 and a tap water pipe 14. The tap water tank 10 is arranged at the lower part of the ice maker structure frame 16. The tap water tank 10 is respectively provided with the ice melting circulation pipeline 11 and the tap water pipe 14. The tap water tank 10 is connected to the heat exchange pipeline of the ice mold 7 through the ice melting circulation pipeline 11. The ice melting circulation pipeline 11 is equipped with an ice melting circulation pump 12 to provide power for the water in the ice melting line. The tap water tank 10 is connected to the ice mold 7 through the tap water pipe 14. The tap water pipe 14 is equipped with a water supply pump 13 to provide power for the water to be transported into the cavity of the ice mold 7.

[0032] The ice lifting system includes a screw 15, an ice lifting platform 17, a double-shaft motor 18 and a speed reducer 19. The double-shaft motor 18 is installed above one end of the ice maker structure frame 16 close to the adjustable slope conveyor system. The two ends of the double-shaft motor 18 are respectively connected to the speed reducer 19. The output shaft of the speed reducer 19 is matched with the screw 15 through a worm and worm gear 20. The screw 15 is arranged on both sides of the ice maker structure frame 16. The bottom of the screw 15 is rotatably connected to both ends of the ice lifting platform 17.

[0033] The hydraulic cylinder pushing system includes a first hydraulic cylinder 21, a ice pushing frame 22 and a limit guide rail 23. The first hydraulic cylinder 21 is arranged in the ice maker structure frame 16 and faces the ice lifting system. The piston rod of the first hydraulic cylinder 21 is installed with the ice pushing frame 22. There are several limit guide rails 23 and they are arranged on both sides of the ice maker structure frame 16 through columns. Both sides of the ice pushing frame 22 are matched with the limit guide rails 23.

[0034] The adjustable slope conveyor system includes a conveyor belt 24 and a second hydraulic cylinder 25. The conveyor belt 24 is rotatably arranged on one end of the ice maker structure frame 16 through a support frame 26. The second hydraulic cylinder 25 is rotatably arranged on the upper surface of the support frame 26. Both sides of the conveyor belt 24 are respectively connected to both ends of a U-shaped frame 27. The piston rod of the second hydraulic cylinder 25 is connected to the middle position of the U-shaped frame 27.

[0035] Operation method and principle: When the ice maker starts to operate, LNG enters the heat exchanger 2 through the liquefied natural gas inlet pipe 1, is heated and vaporized in the heat exchanger 2, and then flows out through the natural gas return pipe 3. The heat exchanger 2 is connected to the refrigerant ice making system through the refrigerant cold extraction circulation pipeline 5.

[0036] After the refrigerant completes the cooling process, the low-temperature refrigerant is stored in the refrigerant storage tank 4 through the cooling cycle pipeline 5. Under the action of the first refrigerant circulation pump 8, the low-temperature refrigerant enters the refrigerant ice-making cycle pipeline 6 for circulation. The refrigerant ice-making cycle pipeline 6 is built into the ice mold 7, and the low-temperature refrigerant transfers the cold energy to the ice mold 7. The water in the ice mold 7 solidifies under the action of the refrigerant to complete ice-making. The refrigerant with increased temperature flows back to the refrigerant storage tank 4. Under the action of the second refrigerant circulation pump 9, the refrigerant with increased temperature enters the cooling cycle pipeline 5 again to extract the cold energy of LNG.

[0037] After ice-making is completed, the outer side of the ice block is frozen and connected to the inner wall of the ice mold 7. It is necessary to heat up the ice mold 7 to melt the surface ice layer for ice block demolding. When the ice melting system is running, under the action of the ice melting circulation pump 12 on the ice melting circulation pipeline 11, tap water enters the heat exchange pipeline built into the ice mold 7 from the tap water tank 10 and exchanges heat with the ice mold 7 to heat up the ice mold 7. The heated ice mold 7 melts the surface of the ice block. Under the action of gravity, the ice block slides onto the ice block lifting platform 17. The cooled tap water flows back to the tap water tank 10 to complete the ice melting cycle. The cooled tap water is used as the raw material for the next ice-making. Under the action of the water supply pump 13, it is transported to the cavity of the ice mold 7 through the tap water pipe 14. The cooled water can accelerate the speed of the next ice-making, improve the cold energy utilization rate of LNG, be more energy-saving and time-saving. Through the low-temperature refrigerant cycle, the cold energy generated during the gasification of LNG can be efficiently recovered, and this part of cold energy is used for the production of ice blocks. This ice-making machine has good energy-saving effect and high ice-making efficiency.

[0038] After the ice block is demolded, the ice block lifting system starts to run. The double-shaft motor 18 is started. Under the action of the speed reducer 19, the worm and worm gear 20 with reduced speed drives the screw rod 15 to run, and the ice block lifting platform 17 is lowered to the bottom of the ice-making machine structure frame 16 to complete the lowering of the ice block lifting platform 17.

[0039] When the lifting platform 17 reaches the bottom of the ice-making machine structure frame 16, the first hydraulic oil pump 21 runs, and the oil fluid flows into the piston chamber to push the piston, so that the ice pushing frame 22 runs along the sliding guide rail 23 to push the ice block onto the conveyor belt 24 to complete the pushing of the ice block.

[0040] When the ice block is transported onto the conveyor belt 24, according to the height of the vehicle cargo box, the first hydraulic oil pump 25 is started, and by adjusting the telescopic of the piston rod, the height of the end of the conveyor belt is changed to match the transport vehicles of different heights, making the transportation and loading and unloading of the ice block more time-saving and labor-saving.

[0041] The details not described in this utility model are all well-known technologies in the art.

[0042] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified and equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An LNG cold energy ice making machine, characterized in that: The ice making machine comprises an LNG gasification system, a refrigerant ice making system, an ice melting system, an ice cube lifting system, a hydraulic cylinder pushing system, a slope-adjustable conveyor belt system and an ice making machine structural frame (16), wherein the LNG gasification system, the refrigerant ice making system, the ice melting system, the ice cube lifting system and the hydraulic cylinder pushing system are all arranged in the ice making machine structural frame (16), and the slope-adjustable conveyor belt system is arranged at one end outside the ice making machine structural frame (16); The LNG gasification system comprises a liquefied natural gas inlet pipe (1), a heat exchanger (2) and a natural gas return pipe (3); the upper surface of the heat exchanger (2) is provided with the liquefied natural gas inlet pipe (1) and the natural gas return pipe (3); the liquefied natural gas inlet pipe (1) and the natural gas return pipe (3) are interconnected; The refrigerant ice-making system comprises a refrigerant storage tank (4), a refrigerant cold circulation pipeline (5), a refrigerant ice-making circulation pipeline (6) and an ice mold (7); the two ends of the refrigerant storage tank (4) are respectively connected to the refrigerant cold circulation pipeline (5) and the refrigerant ice-making circulation pipeline (6); the refrigerant storage tank (4) is connected to the heat exchanger (2) via the refrigerant cold circulation pipeline (5); and the refrigerant storage tank (4) is connected to the ice mold (7) via the refrigerant ice-making circulation pipeline (6); The ice-melting system comprises a tap water tank (10), an ice-melting circulation pipeline (11) and a tap water pipe (14); the tap water tank (10) is arranged at the lower part of the ice-making machine structural frame (16); the tap water tank (10) is respectively provided with an ice-melting circulation pipeline (11) and a tap water pipe (14); the tap water tank (10) is connected to a heat exchange pipeline of an ice mold (7) via the ice-melting circulation pipeline (11); and the tap water tank (10) is connected to the ice mold (7) via the tap water pipe (14); The ice cube lifting system comprises a screw (15), an ice cube lifting platform (17), a double-shaft motor (18) and a reducer (19); the double-shaft motor (18) is mounted above one end of the ice maker structural frame (16) close to the adjustable conveyor belt system; both ends of the double-shaft motor (18) are respectively connected to the reducer (19); the output shaft of the reducer (19) cooperates with the screw (15) through a worm gear (20); the screw (15) is arranged on both sides of the ice maker structural frame (16); and the bottom of the screw (15) is rotatably connected to both ends of the ice cube lifting platform (17); The hydraulic cylinder pushing system comprises a first hydraulic cylinder (21), an ice pushing frame (22) and a limiting guide rail (23); the first hydraulic cylinder (21) is arranged in the ice making machine structural frame (16) and faces the ice cube lifting system; the piston rod of the first hydraulic cylinder (21) is installed with the ice pushing frame (22); there are a plurality of limiting guide rails (23) and they are arranged on both sides of the ice making machine structural frame (16) through columns; both sides of the ice pushing frame (22) cooperate with the limiting guide rails (23); The slope-adjustable conveyor belt system comprises a conveyor belt (24) and a second hydraulic cylinder (25); the conveyor belt (24) is rotatably arranged on an ice-making machine structural frame (16) through a support frame (26) and is located at one end of the ice-making machine structural frame (16); a second hydraulic cylinder (25) is rotatably arranged on the upper surface of the support frame (26); both sides of the conveyor belt (24) are respectively connected to the two ends of a U-shaped frame (27); and a piston rod of the second hydraulic cylinder (25) is connected to the middle position of the U-shaped frame (27).

2. The LNG cold energy ice making machine according to claim 1, characterized in that: The refrigerant extraction circulation pipeline (5) is installed with a first refrigerant circulation pump (8).

3. The LNG cold energy ice making machine according to claim 1, characterized in that: The refrigerant ice-making circulation pipeline (6) is equipped with a second refrigerant circulation pump (9).

4. The LNG cold energy ice making machine according to claim 1, characterized in that: The ice-melting circulation pipeline (11) is equipped with an ice-melting circulation pump (12).

5. The LNG cold energy ice making machine according to claim 1, characterized in that: The tap water pipe (14) is equipped with a water supply pump (13).

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