A dual-layer LNG supply device

Abstract

This utility model provides a double-layered LNG supply device, including a tank, a heat exchange component, and a temperature measuring mechanism. A first input pipe is connected to the top surface of the tank, and supporting legs are welded to the bottom surface of the tank. A conveying pipe is connected to the side of the tank, and the other end of the conveying pipe is connected to a vaporization tank. The conveying pipe passes through the central area of ​​the vaporization tank, and a second input pipe is connected to the top surface of the vaporization tank. A pressure stabilizing valve is installed on the surface of the conveying pipe. The heat exchange component and the temperature measuring mechanism are both located inside the vaporization tank. This double-layered LNG supply device, through the installed heat exchange component, uses an electric push rod to drive a push ring to continuously push water flow inside the flow cavity, thereby continuously replacing and flowing water in the conveying pipe area. This avoids the localized overcooling and heat accumulation caused by uneven temperature distribution in traditional static heating methods, achieving a dynamically uniform temperature distribution inside the inner tank and improving the LNG vaporization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of LNG gas supply technology, specifically a double-layer LNG gas supply device. Background Technology

[0002] LNG is a clean energy source that is easily transported and stored through cryogenic liquefaction of natural gas. It is primarily used for city gas, industrial fuel, and power generation to achieve efficient energy supply and environmental emission reduction. According to existing technology, such as the LNG-diesel dual-fuel gas supply system for marine propulsion described in Chinese patent document CN215256482U, the disclosed technical solution involves supplying LNG to an LNG storage tank via an LNG replenishment pipe. During the LNG tank replenishment process, the LNG spray pipe and BOG return pipe are continuously opened to depressurize the LNG tank, ensuring smooth replenishment and maintaining the LNG tank pressure within a set range. After the LNG tank replenishment is complete, the LNG delivery pipe supplies LNG to the vaporization heating booster. After LNG is heated and circulated through the water system, it is vaporized and enters the buffer tank through the natural gas pipeline. The gas pressure fluctuations are buffered before it enters the port / starboard main engine through the port / starboard natural gas supply pipeline. After combustion, it provides power to the hull. As the LNG in the storage tank is consumed, the pressure in the storage tank gradually decreases. When the pressure in the storage tank drops to the minimum set value, the LNG storage tank supplies LNG to the vaporization heating and pressurizing unit through the LNG pressurizing pipe. After heat exchange between the vaporization heating and pressurizing unit and the water system, the BOG pressurizing pipe pressurizes the LNG storage tank. When the LNG storage tank pressure reaches the maximum set value, the LNG pressurizing pipe automatically closes until the LNG storage tank pressure reaches the minimum set value, at which point the LNG pressurizing pipe automatically opens, and this cycle continues.

[0003] According to its publicly available technical solutions, the existing technology involves transporting LNG into the inside of a delivery pipe, then placing the delivery pipe inside a water tank, heating the delivery pipe to vaporize the LNG. In this process, the water level inside the water tank is static, and the water in the delivery pipe area cannot flow sufficiently, resulting in the cooled water remaining in the delivery pipe area, leading to low heat exchange efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a double-layered LNG supply device to solve the problems mentioned in the background. The heat exchange component installed in this invention uses an electric push rod to drive a push ring to continuously push water flow inside the flow cavity, thereby continuously replacing and flowing water in the delivery pipeline area. This avoids the local overcooling and heat accumulation caused by uneven temperature distribution in traditional static heating methods, achieving dynamic and uniform temperature distribution inside the inner tank and improving the LNG gasification efficiency.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a double-layered LNG gas supply device, comprising a gas supply device body, the gas supply device body including a tank, a heat exchange component and a temperature measuring mechanism, a first input pipe connected to the top surface of the tank, a support leg welded to the bottom surface of the tank, a conveying pipe connected to the side surface of the tank, a vaporization tank connected to the other end of the conveying pipe, the conveying pipe passing through the central area of ​​the vaporization tank, a second input pipe connected to the top surface of the vaporization tank, a pressure stabilizing valve installed on the surface of the conveying pipe, and the heat exchange component and the temperature measuring mechanism both being disposed inside the vaporization tank.

[0006] Furthermore, the heat exchange assembly includes a pusher ring, a heating ring, an electric pusher rod, and an exchange cavity. The vaporization barrel has an inner barrel inside, and a flow cavity is provided between the vaporization barrel and the inner barrel.

[0007] Furthermore, the push ring is fitted onto the surface of the inner barrel, the electric push rod is fixed to the end of the gasification barrel, and the end of the electric push rod is welded with a push ring.

[0008] Furthermore, the heating ring is fitted onto the surface of the inner barrel, the inner wall of the heating ring is welded to the surface of the inner barrel, and a first circular hole is formed on the surface of the heating ring, through which the end of the electric push rod passes.

[0009] Furthermore, the exchange cavity is located in the end region of the gasification barrel, and the end of the inner barrel and the end of the flow cavity are both connected to the side of the exchange cavity.

[0010] Furthermore, a second circular hole is provided on the side of the exchange cavity, and the end of the electric push rod passes through the side of the exchange cavity.

[0011] Furthermore, the temperature measuring mechanism includes a thin plate and a groove, the groove being disposed on the bottom surface of the conveying pipe, and the thin plate being disposed inside the inner barrel.

[0012] Furthermore, the inner wall of the inner barrel is provided with a groove, the bottom surface of the thin plate is fixed with a protrusion, the protrusion is embedded in the groove, the top surface of the thin plate is connected with a protruding plate, the end of the protruding plate is connected with a temperature sensor, the protruding plate is inserted into the groove, and the temperature sensor contacts the bottom surface of the conveying pipe.

[0013] The beneficial effects of this utility model are:

[0014] 1. This double-layer LNG supply device uses an installed heat exchange component and an electric push rod to drive the push ring to continuously push the water flow inside the flow cavity, thereby continuously replacing and flowing the water in the delivery pipeline area. This avoids the local overcooling and heat accumulation caused by uneven temperature distribution in traditional static heating methods, and achieves dynamic and uniform temperature distribution inside the inner tank, thus improving the LNG gasification efficiency.

[0015] 2. This dual-layer LNG supply device uses an installed temperature measuring mechanism. The water flow pushes the thin plate to move, which in turn moves the temperature measuring device along the surface of the delivery pipeline. This allows the temperature measuring device to measure the temperature of the delivery pipeline within a certain area rather than monitoring a fixed point, thereby obtaining more representative overall temperature data and preventing a series of risks caused by overheating or underheating. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the external appearance of a double-layered LNG gas supply device according to this utility model.

[0017] Figure 2 This is a cross-sectional view of the vaporization tank of a double-stacked LNG gas supply device according to the present invention.

[0018] Figure 3 This is a schematic diagram of the heating ring of a double-layered LNG gas supply device according to the present invention;

[0019] Figure 4 for Figure 2 Enlarged view of region A in the middle;

[0020] In the diagram: 1. Tank; 2. Heat exchange assembly; 3. Temperature measuring mechanism; 4. Gasification tank; 5. Conveying pipeline; 6. Electric push rod; 7. Pressure regulating valve; 8. Exchange cavity; 9. Thin plate; 10. Thermometer; 11. Push ring; 12. Inner tank; 13. Heating ring; 14. First circular hole; 15. Support leg; 16. Second circular hole; 17. Groove; 18. First input pipe; 19. Second input pipe; 20. Flow cavity; 21. Convex plate. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please see Figures 1 to 4This utility model provides the following technical solution: a double-layered LNG gas supply device, including a gas supply device body, the gas supply device body including a tank 1, a heat exchange component 2 and a temperature measuring mechanism 3, the top surface of the tank 1 is connected to a first input pipe 18, the bottom surface of the tank 1 is welded with a support leg 15, the side of the tank 1 is connected to a conveying pipe 5, the other end of the conveying pipe 5 is connected to a vaporization tank 4, the conveying pipe 5 passes through the central area of ​​the vaporization tank 4, the top surface of the vaporization tank 4 is connected to a second input pipe 19, the surface of the conveying pipe 5 is equipped with a pressure stabilizing valve 7, the heat exchange component 2 and the temperature measuring mechanism 3 are both set inside the vaporization tank 4, the electric push rod 6 drives the push ring 11 to move, the displacement of the push ring 11 pushes the water inside the vaporization tank 4 to flow, thereby linking the temperature measuring mechanism 3 to move.

[0023] In this embodiment, the heat exchange assembly 2 includes a push ring 11, a heating ring 13, an electric push rod 6, and an exchange cavity 8. An inner layer 12 is disposed inside the vaporization tank 4, and a flow cavity 20 is provided between the vaporization tank 4 and the inner layer 12. The push ring 11 is fitted onto the surface of the inner layer 12. The electric push rod 6 is fixed to the end of the vaporization tank 4, and the push ring 11 is welded to the end of the electric push rod 6. The heating ring 13 is fitted onto the surface of the inner layer 12, and the inner wall of the heating ring 13 is welded to the surface of the inner layer 12. A first circular hole 14 is provided, and the end of the electric push rod 6 passes through the interior of the first circular hole 14. The exchange cavity 8 is located in the end area of ​​the gasification barrel 4. The end of the inner barrel 12 and the end of the flow cavity 20 are both connected to the side of the exchange cavity 8. A second circular hole 16 is provided on the side of the exchange cavity 8, and the end of the electric push rod 6 passes through the side of the exchange cavity 8. The electric push rod 6 drives the push ring 11 to move, so that the water inside the flow cavity 20 and the water inside the inner barrel 12 continue to flow, avoiding local overcooling and heat accumulation in the delivery pipeline 5.

[0024] In this embodiment, the temperature measuring mechanism 3 includes a thin plate 9 and a groove 17. The groove 17 is disposed on the bottom surface of the conveying pipe 5, and the thin plate 9 is disposed inside the inner barrel 12. The inner wall of the inner barrel 12 has a sliding groove. A protrusion is fixed on the bottom surface of the thin plate 9 and is embedded in the sliding groove. A protruding plate 21 is connected to the top surface of the thin plate 9, and a thermometer 10 is connected to the end of the protruding plate 21. The protruding plate 21 is inserted into the groove 17, and the thermometer 10 contacts the bottom surface of the conveying pipe 5. The flow pushes the thin plate 9 to move along the sliding groove, thereby causing the thermometer 10 to move along the surface of the conveying pipe 5 to measure the temperature of the conveying pipe 5.

[0025] Working principle: LNG is delivered into the tank 1 through the first input pipe 18, and water is delivered into the vaporization tank 4 through the second input pipe 19. The heating ring 13 is turned on to heat the water in the flow cavity 20. The electric push rod 6 is turned on, and the electric push rod 6 drives the push ring 11 to move back along the surface of the inner sleeve. The displacement of the push ring 11 pushes the heated water in the flow cavity 20 to flow. The heated water passes through the first round hole 14 on the surface of the heating ring 13 and the second round hole 16 on the surface of the exchange cavity 8 to enter the interior of the exchange cavity 8. The hot water in the exchange cavity 8 passes through the second round hole 16 located in the end area of ​​the inner tank 12 to enter the interior of the inner tank 12, so that heated water continuously flows into the inner tank 12. The LNG in the tank 1 enters the delivery pipe 5. The LNG in the delivery pipe 5 is heated in the inner tank 12. The inner tank 12 is then transported... The cooled water in pipe 5 is pushed into the exchange cavity 8 by the heated water, and finally circulates to the heating ring 13 area for reheating, so that the water in the water supply pipe area of ​​the inner tank 12 continues to flow. During the flow of water inside the inner tank 12, the thin plate 9 is pushed to move along the slide groove. The displacement of the thin plate 9 causes the convex plate 21 and the thermometer 10 to move synchronously inside the groove 17 of the conveying pipe 5. During the displacement process of the thermometer 10, the temperature of the central area of ​​the conveying pipe 5 is measured. By monitoring the temperature of the conveying pipe 5, the temperature of the heating ring 13 is further adjusted to keep the temperature of the conveying pipe 5 within a suitable range. The gas after vaporization is discharged after being adjusted to a suitable pressure by the pressure regulating valve 7. The pressure regulating valve 7 described in this application is an existing mature technology and belongs to common knowledge in the field. Moreover, this utility model is mainly used to protect the mechanical structure, so this utility model will not explain the specific structure and specifications of the pressure regulating valve 7 in detail.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dual-layer LNG supply device, comprising a supply device body, characterized in that: The gas supply device body includes a tank (1), a heat exchange assembly (2), and a temperature measuring mechanism (3). A first input pipe (18) is connected to the top surface of the tank (1), and a support leg (15) is welded to the bottom surface of the tank (1). A conveying pipe (5) is connected to the side of the tank (1), and a vaporization tank (4) is connected to the other end of the conveying pipe (5). The conveying pipe (5) passes through the central area of ​​the vaporization tank (4). A second input pipe (19) is connected to the top surface of the vaporization tank (4). A pressure regulating valve (7) is installed on the surface of the conveying pipe (5). The heat exchange assembly (2) and the temperature measuring mechanism (3) are both located inside the vaporization barrel (4). The heat exchange assembly (2) includes a push ring (11), a heating ring (13), an electric push rod (6), and an exchange cavity (8). An inner barrel (12) is provided inside the vaporization barrel (4). A flow cavity (20) is provided between the vaporization barrel (4) and the inner barrel (12). The push ring (11) is fitted onto the surface of the inner barrel (12). The electric push rod (6) is fixed to the end of the vaporization barrel (4). The end of the electric push rod (6) is welded with a push ring (11).

2. The dual-layer LNG supply device according to claim 1, characterized in that: The heating ring (13) is fitted onto the surface of the inner barrel (12), the inner wall of the heating ring (13) is welded to the surface of the inner barrel (12), and a first circular hole (14) is opened on the surface of the heating ring (13). The end of the electric push rod (6) passes through the interior of the first circular hole (14).

3. The dual-layer LNG supply device according to claim 2, characterized in that: The exchange cavity (8) is located in the end region of the gasification barrel (4), and the end of the inner barrel (12) and the end of the flow cavity (20) are both connected to the side of the exchange cavity (8).

4. The dual-layer LNG supply device according to claim 3, characterized in that: The side of the exchange cavity (8) is provided with a second circular hole (16), and the end of the electric push rod (6) passes through the side of the exchange cavity (8).

5. A double-layered LNG supply device according to claim 1, characterized in that: The temperature measuring mechanism (3) includes a thin plate (9) and a groove (17). The groove (17) is located on the bottom surface of the conveying pipe (5), and the thin plate (9) is located inside the inner barrel (12).

6. A double-layered LNG supply device according to claim 5, characterized in that: The inner wall of the inner barrel (12) is provided with a sliding groove. The bottom surface of the thin plate (9) is fixed with a protrusion. The protrusion is embedded in the sliding groove. The top surface of the thin plate (9) is connected with a protruding plate (21). The end of the protruding plate (21) is connected with a thermometer (10). The protruding plate (21) is inserted into the groove (17). The thermometer (10) contacts the bottom surface of the conveying pipe (5).

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