High-efficiency movable liquid helium recovery system

Abstract

The utility model belongs to the technical field of recovery and storage of liquefied helium, and particularly relates to a high-efficiency movable liquid helium recovery system which comprises a vacuum cavity, a cold head container and a liquid conveying pipe are arranged in the vacuum cavity, and a plurality of layers of cold screens are fixedly connected to the surface of the cold head container. A liquid helium cavity, a convection isolation plate, a cold head first-stage heat exchanger and a cold head second-stage heat exchanger are arranged in the cold head container. According to the high-efficiency movable liquid helium recovery system, the surfaces of the multiple layers of cold screens are fixedly connected with the surface of the liquid helium cavity, the sufficient temperature gradient is guaranteed, heat leakage is reduced, the liquefaction efficiency is improved, the cold head first-stage heat exchanger and the cold head second-stage heat exchanger are arranged, and a convection isolation plate is arranged between the cold head second-stage heat exchanger and the cold head first-stage heat exchanger, so that the liquefaction efficiency is greatly improved; and the Foma wheels are arranged at the bottom of the vacuum cavity, so that the helium recovery system can be transported and moved at will, and the technical problems that an existing helium recovery system is large in occupied space, high in power consumption, high in maintenance cost, immovable and lack of flexibility are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of liquefied helium's recovery and storage, especially to a high-efficiency movable liquid helium recovery system. BACKGROUND

[0002] Liquid helium is an ultralow-temperature coolant. Due to its unique ultralow-temperature characteristics, liquid helium is widely used in many fields. However, the preparation and transportation costs of liquid helium are very high, and the production of liquid helium is relatively small. Therefore, the price of liquid helium on the market is high and it is not easy to store and transport. Moreover, due to the use requirements, after using liquid helium, many industries can only convert it into helium gas and then discharge it into the air, which is a great waste of valuable pure helium resources.

[0003] The existing liquid helium recovery system is generally large in size and occupies a large space. Therefore, it is difficult for many enterprises that do not have a reserved space in advance to use it. In addition, the cost of such a large system is high, and many small institutions and enterprises can only watch it from a distance. The power consumption of such a system is also relatively large, and the maintenance cost is high during long-term operation. Moreover, the system is not movable and lacks flexibility, and can only be used in a specific place. SUMMARY

[0004] In view of the technical problems of the existing helium recovery system, such as large space occupation, high power consumption, high maintenance cost, immobility, and lack of flexibility, the utility model provides a high-efficiency movable liquid helium recovery system.

[0005] The high-efficiency movable liquid helium recovery system comprises a vacuum cavity, a liquid inlet, a liquid pipe tower joint, a vacuum suction port, a vacuum signal wall-penetrating, a GM refrigerator, and a support frame are arranged on the surface of the vacuum cavity, a Foma wheel is fixedly installed on the surface of the support frame, a cold head container and a liquid inlet pipe are arranged in the vacuum cavity, a plurality of cold screens are fixedly connected to the surface of the cold head container, a liquid helium cavity, a convection insulation plate, a cold head primary heat exchanger, and a cold head secondary heat exchanger are arranged in the cold head container, and a liquid helium level meter is arranged in the liquid helium cavity.

[0006] Preferably, the surface of the liquid helium cavity is fixedly connected to the bottom of the cold head container, the inner wall of the liquid helium cavity is fixedly connected to the surface of the liquid helium level meter, and the surface of the cold head container is fixedly connected to the inner wall of the vacuum cavity.

[0007] Preferably, the surface of the convection insulation plate, the surface of the cold head primary heat exchanger, and the surface of the cold head secondary heat exchanger are all fixedly connected to the inner wall of the cold head container, and the convection insulation plate is located between the cold head primary heat exchanger and the cold head secondary heat exchanger.

[0008] Preferably, one end of the GM refrigerator is located inside the cold head container, the surface of the cold head primary heat exchanger is fixedly connected with the primary stage of the GM refrigerator, and the surface of the cold head secondary heat exchanger is fixedly connected with the secondary stage of the GM refrigerator.

[0009] Preferably, the surface of the vacuum signal wall, the surface of the GM refrigerator and the surface of the support frame are all fixedly connected with the surface of the vacuum cavity, and the plurality of Forma wheels are distributed in a circumferential array with the axis of the support frame as the center.

[0010] Preferably, the inner wall of the vacuum cavity is fixedly communicated with one end of the infusion port and one end of the vacuum suction port respectively, two ends of the infusion tube are fixedly communicated with the inner wall of the liquid helium cavity and one end of the infusion port respectively, and one end of the infusion tube tower joint is fixedly communicated with the other end of the infusion port.

[0011] The beneficial effects in the utility model are:

[0012] By fixing the surface of the multi-layer cold shield with the surface of the liquid helium cavity, sufficient temperature gradient is ensured, heat leakage is reduced and liquefaction efficiency is improved, the cold head primary heat exchanger and the cold head secondary heat exchanger are arranged, the convection insulation plate is arranged between the cold head secondary heat exchanger and the cold head primary heat exchanger, liquefaction efficiency is greatly improved, heat leakage is reduced, the liquid helium level meter can be installed to monitor the liquid level in real time, the infusion tube tower joint is installed in the infusion port, various diameters of liquid helium infusion tubes can be matched, the Forma wheel is arranged at the bottom of the vacuum cavity, and the technical problems of large space occupation, large power consumption, high maintenance cost, immobility and lack of flexibility of the existing helium recovery system are solved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 A high-efficiency movable liquid helium recovery system is provided in the utility model, and a schematic view of the high-efficiency movable liquid helium recovery system is shown in the figure.

[0014] Fig. 2 A cold head container structure perspective view of the high-efficiency movable liquid helium recovery system is provided in the utility model.

[0015] Fig. 3 A liquid helium level meter structure perspective view of the high-efficiency movable liquid helium recovery system is provided in the utility model.

[0016] In the figure: 1, vacuum cavity; 2, infusion port; 3, infusion tube tower joint; 4, vacuum suction port; 5, vacuum signal wall; 6, GM refrigerator; 7, support frame; 8, Forma wheel; 9, cold head container; 10, infusion tube; 11, multi-layer cold shield; 12, liquid helium cavity; 13, convection insulation plate; 14, cold head primary heat exchanger; 15, cold head secondary heat exchanger; 16, liquid helium level meter. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0018] With reference to Figs. 1-3 A high-efficiency movable liquid helium recovery system, comprising a vacuum cavity 1, the surface of the vacuum cavity 1 is respectively provided with a liquid inlet 2, a liquid pipe tower joint 3, a vacuum suction port 4, a vacuum signal wall 5, a GM refrigerator 6 and a support frame 7, the surface of the support frame 7 is fixedly installed with a formar wheel 8, the inside of the vacuum cavity 1 is respectively provided with a cold head container 9 and a liquid inlet pipe 10, the surface of the cold head container 9 is fixedly connected with a multilayer cold screen 11, the inside of the cold head container 9 is respectively provided with a liquid helium cavity 12, a convection insulation plate 13, a cold head primary heat exchanger 14 and a cold head secondary heat exchanger 15, and the inside of the liquid helium cavity 12 is provided with a liquid helium level meter 16.

[0019] The surface of the liquid helium cavity 12 is fixedly connected with the bottom of the cold head container 9, the inner wall of the liquid helium cavity 12 is fixedly connected with the surface of the liquid helium level meter 16, and the surface of the cold head container 9 is fixedly connected with the inner wall of the vacuum cavity 1.

[0020] Further, the liquid helium level meter 16 can monitor the liquid helium level inside the liquid helium cavity 12 in real time.

[0021] The surface of the convection insulation plate 13, the surface of the cold head primary heat exchanger 14 and the surface of the cold head secondary heat exchanger 15 are all fixedly connected with the inner wall of the cold head container 9, and the convection insulation plate 13 is located between the cold head primary heat exchanger 14 and the cold head secondary heat exchanger 15.

[0022] Further, the convection insulation plate 13 is arranged between the cold head secondary heat exchanger 15 and the cold head primary heat exchanger 14 to reduce heat leakage.

[0023] One end of the GM refrigerator 6 is located inside the cold head container 9, the surface of the cold head primary heat exchanger 14 is fixedly connected with the first stage of the GM refrigerator 6, and the surface of the cold head secondary heat exchanger 15 is fixedly connected with the second stage of the GM refrigerator 6.

[0024] Further, the double heat exchange of the cold head primary heat exchanger 14 and the cold head secondary heat exchanger 15 is arranged to greatly improve the liquefaction efficiency.

[0025] The surface of the vacuum signal wall 5, the surface of the GM refrigerator 6 and the surface of the support frame 7 are all fixedly connected with the surface of the vacuum cavity 1, and the plurality of formar wheels 8 are distributed in a circumferential array with the axis of the support frame 7 as the center.

[0026] Further, the vacuum signal wall 5 makes the liquid helium level gauge 16 signal inside the vacuum cavity 1, install Foma wheel 8 to facilitate flexible movement of the vacuum cavity 1.

[0027] The inner wall of the vacuum cavity 1 is fixedly communicated with one end of the liquid inlet 2 and one end of the vacuum outlet 4, respectively, and the two ends of the liquid helium inlet pipe 10 are fixedly communicated with the inner wall of the liquid helium cavity 12 and one end of the liquid inlet 2, respectively, and one end of the liquid helium inlet pipe tower joint 3 is fixedly communicated with the other end of the liquid inlet 2.

[0028] Further, the liquid helium inlet pipe tower joint 3 can match various diameters of the liquid helium inlet pipe 10, facilitating recycling.

[0029] By setting the surface of the multi-layer cold shield 11 and the surface of the liquid helium cavity 12 fixedly connected, sufficient temperature gradient is ensured, heat leakage is reduced, and liquefaction efficiency is improved, the cold head primary heat exchanger 14 and the cold head secondary heat exchanger 15 are set, the convection insulation plate 13 is set between the cold head secondary and the cold head primary, the liquefaction efficiency is greatly improved, the heat leakage is reduced, the liquid level gauge is installed to monitor the liquid level in real time, the liquid inlet pipe tower joint 3 is installed in the liquid inlet 2, which can match various diameters of the liquid helium inlet pipe 10, the Foma wheel 8 is installed at the bottom of the vacuum cavity 1, which can be arbitrarily transported and moved, solving the technical problems of the existing helium recovery system, such as large space occupation, large power consumption, high maintenance cost, immobility and lack of flexibility.

[0030] Working principle:

[0031] Before use, the bottom of the vacuum cavity 1 is provided with a support frame 7, a plurality of Foma wheels 8 are installed below the support frame 7, the vacuum cavity 1 is moved to the working area through the plurality of Foma wheels 8, the infusion port 2 provided on the surface of the vacuum cavity 1 is fixedly connected with one end of the infusion tube cone joint 3 and one end of the infusion tube 10 at two ends respectively, the other end of the infusion tube 10 is fixedly communicated with the inner wall of the liquid helium cavity 12, the recovered liquid helium passes through the infusion tube cone joint 3 and the infusion port 2, and enters the inside of the liquid helium cavity 12 through the infusion tube 10 in the inside of the vacuum cavity 1, the inner wall of the liquid helium cavity 12 is fixedly connected with a liquid helium level meter 16, the liquid helium level in the inside of the liquid helium cavity 12 is monitored in real time, the liquid helium cavity 12 is located at the bottom of the cold head container 9, a plurality of cold screens 11 are arranged on the surface of the cold head container 9, sufficient temperature gradient is ensured, heat leakage is reduced, and liquefaction efficiency is improved, the GM refrigerator 6 is inserted into the inside of the cold head container 9, a cold head primary heat exchanger 14 and a cold head secondary heat exchanger 15 are arranged in the inside of the cold head container 9 respectively to carry out double refrigeration heat exchange, and the liquefaction efficiency is greatly improved, the convection insulation plate 13 is arranged between the cold head secondary heat exchanger 15 and the cold head primary heat exchanger 14 to reduce heat leakage, the cold head container 9 is fixedly connected with the inner wall of the vacuum cavity 1, the vacuum cavity 1 is provided with a vacuum suction port 4 on the surface, the vacuum cavity 1 and the cold head container 9 are vacuumized to reduce heat leakage, the vacuum cavity 1 is fixedly connected with a vacuum signal wall penetrating 5, the signal of the liquid helium level meter 16 is connected, the real-time monitoring of the liquid helium level meter 16 is facilitated, and the GM refrigerator 6 is arranged above the vacuum cavity 1 to carry out refrigeration heat exchange on the liquid helium in the inside of the liquid helium cavity 12.

[0032] The above merely describes a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A high efficiency mobile liquid helium recovery system comprising a vacuum chamber (1), characterized in that: The surface of the vacuum cavity (1) is respectively provided with an infusion port (2), an infusion tube tower joint (3), a vacuum suction port (4), a vacuum signal through wall (5), a GM refrigerator (6) and a support frame (7), the surface of the support frame (7) is fixedly installed with a Foma wheel (8), the inside of the vacuum cavity (1) is respectively provided with a cold head container (9) and an infusion tube (10), the surface of the cold head container (9) is fixedly connected with a multilayer cold screen (11), the inside of the cold head container (9) is respectively provided with a liquid helium cavity (12), a convection insulation plate (13), a cold head primary heat exchanger (14) and a cold head secondary heat exchanger (15), the inside of the liquid helium cavity (12) is provided with a liquid helium level gauge (16).

2. The high-efficiency movable liquid helium recovery system according to claim 1, characterized in that: The surface of the liquid helium cavity (12) is fixedly connected with the bottom of the cold head container (9), the inner wall of the liquid helium cavity (12) is fixedly connected with the surface of the liquid helium level gauge (16), and the surface of the cold head container (9) is fixedly connected with the inner wall of the vacuum cavity (1).

3. The high-efficiency movable liquid helium recovery system according to claim 1, characterized in that: The surface of the convection insulation plate (13), the surface of the cold head primary heat exchanger (14) and the surface of the cold head secondary heat exchanger (15) are all fixedly connected with the inner wall of the cold head container (9), and the convection insulation plate (13) is located between the cold head primary heat exchanger (14) and the cold head secondary heat exchanger (15).

4. The high-efficiency movable liquid helium recovery system according to claim 1, characterized in that: One end of the GM refrigerator (6) is located in the inside of the cold head container (9), the surface of the cold head primary heat exchanger (14) is fixedly connected with the primary of the GM refrigerator (6), and the surface of the cold head secondary heat exchanger (15) is fixedly connected with the secondary of the GM refrigerator (6).

5. The high-efficiency movable liquid helium recovery system according to claim 1, characterized in that: The surface of the vacuum signal through wall (5), the surface of the GM refrigerator (6) and the surface of the support frame (7) are all fixedly connected with the surface of the vacuum cavity (1), and a plurality of Foma wheels (8) are distributed in a circumferential array with the axis of the support frame (7) as the center.

6. The high-efficiency movable liquid helium recovery system according to claim 1, characterized in that: The inner wall of the vacuum cavity (1) is fixedly communicated with one end of the infusion port (2) and one end of the vacuum suction port (4), respectively, both ends of the infusion tube (10) are fixedly communicated with the inner wall of the liquid helium cavity (12) and one end of the infusion port (2), respectively, and one end of the infusion tube tower joint (3) is fixedly communicated with the other end of the infusion port (2).

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