Large-flow vehicle-mounted liquid hydrogen vaporizer for mobile liquid hydrogen refueling station

Abstract

The utility model discloses a large-flow vehicle-mounted liquid hydrogen vaporizer for a mobile liquid hydrogen refueling station, which solves the problem of height limitation of the vehicle-mounted liquid hydrogen vaporizer by adopting a double-machine parallel connection mode, and solves the problem of overhigh gas velocity at an outlet by adopting double-pipeline parallel connection inside the vehicle-mounted liquid hydrogen vaporizer. The liquid hydrogen vaporizing pipeline of the vehicle-mounted liquid hydrogen vaporizer adopts a nesting mode, after the stainless steel pipe is placed in the aluminum alloy pipe, the notch of the aluminum alloy pipe is closed through welding, the stainless steel pipe and the aluminum alloy pipe are tightly attached, and the problem that the liquid hydrogen stainless steel pipeline cannot be attached through pipe expansion is solved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical equipment, in particular to a large-flow vehicle-mounted liquid hydrogen vaporizer for a mobile liquid hydrogen refueling station. Background Art

[0002] Liquid hydrogen is a liquid obtained by cooling hydrogen gas. It is a colorless, odorless, high-energy, low-temperature liquid fuel. The normal boiling point of hydrogen under one atmosphere is 20.37K (-252.78℃). 95MPa liquid hydrogen will form supercritical hydrogen during the vaporization process. The thermophysical properties of supercritical hydrogen are extremely unstable. The liquid hydrogen vaporizer is one of the key equipment in the liquid hydrogen refueling station.

[0003] At present, there are few liquid hydrogen vaporizers in China, and they are fixed. When used with fixed liquid hydrogen refueling stations, fixed hydrogen refueling stations have many problems such as difficult site selection and long construction period.

[0004] In summary, a large-flow vehicle-mounted liquid hydrogen vaporizer for a mobile liquid hydrogen refueling station is needed to address the deficiencies in the prior art. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a large-flow vehicle-mounted liquid hydrogen vaporizer for a mobile liquid hydrogen refueling station, aiming to solve the above-mentioned problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a large-flow vehicle-mounted liquid hydrogen vaporizer for a mobile liquid hydrogen refueling station, comprising at least two vaporizer units, the vaporizer units are connected in parallel, the vaporizer units include a liquid hydrogen vaporization pipeline, a top fixing frame is arranged at the upper part of the liquid hydrogen vaporization pipeline, the top fixing frame is fixedly connected to the liquid hydrogen vaporization pipeline, a bottom support frame is arranged at the lower part of the liquid hydrogen vaporization pipeline, and the bottom support frame is fixedly connected to the liquid hydrogen vaporization pipeline. The liquid hydrogen vaporizer adopts two vaporizer units, the two vaporizer units are connected in parallel, and the two liquid hydrogen vaporization pipelines of a single vaporizer unit are connected in parallel, so that the vehicle-mounted liquid hydrogen vaporizer is equivalent to four liquid hydrogen pipelines in parallel, with a unified liquid hydrogen inlet and liquid hydrogen outlet, which effectively solves the problem of excessive outlet steam velocity.

[0007] Optionally, the liquid hydrogen vaporization pipeline includes a plurality of vaporization tubes, vaporization fins are provided on the vaporization tubes, and the vaporization fins are fixedly connected to the vaporization tubes.

[0008] Optionally, an opening is provided on the vaporization tube, and the opening is provided between two adjacent vaporization fins.

[0009] The liquid hydrogen vaporization tube is formed by nesting a stainless steel tube and an aluminum alloy tube. The outer periphery of the vaporization inner tube is evenly covered with 8 aluminum fins, and it is a non-fully enclosed structure. The stainless steel tube is placed in the aluminum alloy tube, so that the stainless steel tube can fit tightly with the inner wall of the aluminum alloy tube, so that heat can be transferred from the air to the fins, from the fins to the aluminum alloy tube, from the aluminum alloy tube to the stainless steel tube, and from the stainless steel tube to the liquid hydrogen, thereby performing heat exchange and achieving a vaporization effect.

[0010] The outer surface of the aluminum fin is not a flat structure, but a wavy pattern, which helps to increase the contact area with the air. At the same time, the aluminum fins are fixed by brackets. The fixing method is to set a nested locking mechanism at the end of the fin to prevent the equipment from shaking during the movement of the vehicle.

[0011] Optionally, the vaporization tube is a U-shaped bent tube, and the opening of the vaporization tube is connected by a high-pressure angle connection.

[0012] To prevent leakage, the liquid hydrogen pipeline at the bottom of the vaporizer adopts a U-bend type without connectors, and a high-pressure angle connection is used at the top.

[0013] Optionally, the top fixing frame includes a top rectangular frame, a top connecting rod is provided on the top rectangular frame, and the top connecting rod is detachably connected to the top rectangular frame.

[0014] Optionally, the bottom support frame includes a bottom support frame, a bottom connecting rod is provided on the bottom support frame, and the bottom connecting rod is detachably connected to the bottom support frame.

[0015] Optionally, support columns are disposed at the lower portion of the bottom support frame, the support columns are fixedly connected to the bottom support frame, and the support columns are symmetrically disposed.

[0016] Beneficial effects of the utility model:

[0017] 1. In the utility model, the dual-machine parallel mode is adopted to solve the height limit problem of the vehicle-mounted liquid hydrogen vaporizer. The vehicle-mounted liquid hydrogen vaporizer adopts dual pipelines in parallel to solve the problem of excessively high outlet gas velocity;

[0018] 2. In the utility model, the liquid hydrogen vaporization pipeline of the vehicle-mounted liquid hydrogen vaporizer adopts a nested manner. After the stainless steel tube is placed in the aluminum alloy tube, the aluminum alloy tube is welded to close the gap, so that the stainless steel tube and the aluminum alloy tube are closely fitted, solving the problem that the liquid hydrogen stainless steel pipeline cannot be fitted by expanding the tube;

[0019] 3. In the utility model, the bottom of the vehicle-mounted liquid hydrogen vaporizer adopts a U-shaped bend, and the top adopts a high-pressure NPT angle connection, which reduces the risk of equipment leakage and increases the pressure bearing capacity;

[0020] 4. In the utility model, the aluminum fin end of the vehicle-mounted liquid hydrogen vaporizer has a fixed structure, which increases the overall stability of the equipment;

[0021] 5. In the utility model, the surface of the aluminum fin of the vehicle-mounted liquid hydrogen vaporizer is a wavy structure, which helps to increase the heat exchange performance of the vaporizer and has certain use value and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0023] Figure 2 The utility model is a structural schematic diagram of a liquid hydrogen vaporizer unit.

[0024] Figure 3 This is another structural schematic diagram of the liquid hydrogen vaporizer unit of the utility model.

[0025] Figure 4 The utility model is a structural schematic diagram of a vaporization tube.

[0026] In the figure: 1. vaporizer unit; 2. top fixing frame; 3. bottom supporting frame; 10. on-board liquid hydrogen vaporizer; 11. vaporization pipeline; 12. vaporization tube; 13. vaporization fin; 14. opening; 21. top rectangular frame; 22. top connecting rod; 23. high-pressure angle pass; 31. bottom supporting frame; 32. bottom connecting rod; 33. supporting column. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] like Figure 1-Figure 4 As shown, a large-flow vehicle-mounted liquid hydrogen vaporizer 10 for a mobile liquid hydrogen refueling station includes at least two vaporizer units 1, which are connected in parallel. The vaporizer unit 1 includes a liquid hydrogen vaporization pipeline 11, a top fixing frame 2 is arranged on the upper part of the liquid hydrogen vaporization pipeline 11, and the top fixing frame 2 is fixedly connected to the liquid hydrogen vaporization pipeline 11. A bottom support frame 3 is arranged on the lower part of the liquid hydrogen vaporization pipeline 11, and the bottom support frame 3 is fixedly connected to the liquid hydrogen vaporization pipeline 11.

[0029] The liquid hydrogen vaporization pipeline 11 includes a plurality of vaporization tubes 12, on which vaporization fins 13 are arranged, and the vaporization fins 13 are fixedly connected to the vaporization tubes. An opening 14 is arranged on the vaporization tube 12, and the opening 14 is arranged between two adjacent vaporization fins 13. The vaporization tube 12 is a U-shaped bent tube, and the port of the vaporization tube 12 is connected by a high-pressure angle 23.

[0030] The top fixing frame 2 includes a top rectangular frame 21, on which a top connecting rod 22 is arranged, and the top connecting rod 22 is detachably connected to the top rectangular frame 21; the bottom supporting frame 3 includes a bottom supporting frame 31, on which a bottom connecting rod 32 is arranged, and the bottom connecting rod 32 is detachably connected to the bottom supporting frame 31; a supporting column 33 is arranged at the lower part of the bottom supporting frame 31, and the supporting column 33 is fixedly connected to the bottom supporting frame 31, and the supporting column 33 is symmetrically arranged.

[0031] The working principle of the utility model is as follows: the liquid hydrogen vaporizer adopts two vaporizer units, the two vaporizer units are connected in parallel, and the two liquid hydrogen vaporization pipelines of a single vaporizer unit are connected in parallel, so that the on-board liquid hydrogen vaporizer is equivalent to four liquid hydrogen pipelines in parallel, with a unified liquid hydrogen inlet and liquid hydrogen outlet, which effectively solves the problem of excessive outlet steam velocity.

[0032] The liquid hydrogen vaporization tube is formed by nesting a stainless steel tube and an aluminum alloy tube. The outer periphery of the vaporization inner tube is evenly covered with 8 aluminum fins, and it is a non-fully enclosed structure. The vaporization tube also has vaporization inner fins. The stainless steel tube is placed in the aluminum alloy tube, so that the stainless steel tube can fit tightly with the inner wall of the aluminum alloy tube, so that heat can be transferred from the air to the fins, from the fins to the aluminum alloy tube, from the aluminum alloy tube to the stainless steel tube, and from the stainless steel tube to the liquid hydrogen, thereby performing heat exchange and achieving a vaporization effect.

[0033] The outer surface of the aluminum fin is not a flat structure, but a wavy pattern, which helps to increase the contact area with the air. At the same time, the aluminum fins are fixed by brackets. The fixing method is to set a nested locking mechanism at the end of the fin to prevent the equipment from shaking during the movement of the vehicle.

[0034] To prevent leakage, the liquid hydrogen pipeline at the bottom of the vaporizer adopts a U-bend type without connectors, and a high-pressure angle connection is used at the top.

[0035] The dual-machine parallel mode solves the height limit problem of the on-board liquid hydrogen vaporizer. The on-board liquid hydrogen vaporizer adopts dual pipelines in parallel to solve the problem of too high outlet gas velocity. The liquid hydrogen vaporization pipeline of the on-board liquid hydrogen vaporizer adopts a nested method. After the stainless steel pipe is placed in the aluminum alloy pipe, the aluminum alloy pipe is welded to close the gap, so that the stainless steel pipe and the aluminum alloy pipe fit tightly, solving the problem that the liquid hydrogen stainless steel pipeline cannot be fitted by expanding the pipe;

[0036] The bottom of the vehicle-mounted liquid hydrogen vaporizer adopts a U-shaped bend and the top adopts a high-pressure NPT angle connection, which reduces the risk of equipment leakage and increases the pressure-bearing capacity. The aluminum fin end of the vehicle-mounted liquid hydrogen vaporizer has a fixed structure, which increases the overall stability of the equipment. The surface of the aluminum fin of the vehicle-mounted liquid hydrogen vaporizer is a wavy structure, which helps to increase the heat exchange performance of the vaporizer.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large-flow vehicle-mounted liquid hydrogen vaporizer for a mobile liquid hydrogen refueling station, characterized in that: It comprises at least two vaporizer units, which are connected in parallel with each other. The vaporizer unit comprises a liquid hydrogen vaporization pipeline. A top fixing frame is arranged at the upper part of the liquid hydrogen vaporization pipeline, and the top fixing frame is fixedly connected to the liquid hydrogen vaporization pipeline. A bottom supporting frame is arranged at the lower part of the liquid hydrogen vaporization pipeline, and the bottom supporting frame is fixedly connected to the liquid hydrogen vaporization pipeline.

2. According to claim 1, a large flow vehicle-mounted liquid hydrogen vaporizer for a mobile liquid hydrogen refueling station is characterized in that: The liquid hydrogen vaporization pipeline comprises a plurality of vaporization tubes, vaporization fins are arranged on the vaporization tubes, and the vaporization fins are fixedly connected to the vaporization tubes.

3. According to claim 2, a large flow vehicle-mounted liquid hydrogen vaporizer for a mobile liquid hydrogen refueling station is characterized in that: The vaporization tube is provided with an opening, and the opening is provided between two adjacent vaporization fins.

4. According to claim 2, a large flow vehicle-mounted liquid hydrogen vaporizer for a mobile liquid hydrogen refueling station is characterized in that: The vaporization tube is a U-shaped bent tube, and the opening of the vaporization tube is connected by a high-pressure angle connection.

5. The high-flow vehicle-mounted liquid hydrogen vaporizer for a mobile liquid hydrogen refueling station according to claim 1, characterized in that: The top fixing frame comprises a top rectangular frame, a top connecting rod is arranged on the top rectangular frame, and the top connecting rod is detachably connected to the top rectangular frame.

6. The high-flow vehicle-mounted liquid hydrogen vaporizer for a mobile liquid hydrogen refueling station according to claim 1, characterized in that: The bottom support frame comprises a bottom support frame, a bottom connecting rod is arranged on the bottom support frame, and the bottom connecting rod is detachably connected to the bottom support frame.

7. A high-flow vehicle-mounted liquid hydrogen vaporizer for a mobile liquid hydrogen refueling station according to claim 6, characterized in that: The lower part of the bottom support frame is provided with support columns, the support columns are fixedly connected to the bottom support frame, and the support columns are symmetrically arranged.

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