Ultralow-temperature neon helium Dewar tank with three-layer heat insulation structure

Abstract

The utility model discloses an ultralow-temperature neon helium Dewar tank with a three-layer heat insulation structure, which comprises an outer shell, an inner container shell, a liquid nitrogen interlayer shell, a flange cover and a flange, a plurality of supporting legs are arranged at the bottom of the outer shell, an inner container vacuumizing pipe is arranged on the inner container shell, and one end of the inner container vacuumizing pipe extends out of the outer shell. The liquid nitrogen interlayer shell is arranged between the outer shell and the inner container shell, a liquid nitrogen inlet and outlet pipe is arranged on the liquid nitrogen interlayer shell, one end of the liquid nitrogen inlet and outlet pipe extends out of the outer shell, the tops of the outer shell, the inner container shell and the liquid nitrogen interlayer shell are all connected with the flange, and the flange cover is detachably connected with the flange. The liquid nitrogen interlayer shell is additionally arranged between the outer shell and the inner container shell of the Dewar tank, the liquid nitrogen is additionally arranged between the inner container shell and the liquid nitrogen interlayer shell, the overall heat preservation performance of the tank body is improved, meanwhile, the flange cover is detachably connected with the flange, dismounting and mounting are convenient, the purification system is connected with the flange, and the purification effect is good. The purification system can be conveniently put in and taken out.

Description

Technical Field

[0001] The utility model relates to the technical field of tank bodies, in particular to an ultra-low temperature neon-helium dewar tank with a three-layer insulation structure. Background Art

[0002] Helium-neon is a precious rare gas with a wide range of uses. Currently, most of the helium-neon gas is imported from abroad and cannot be produced on a large scale in China. The ultra-low temperature neon-helium purification system studies the production of high-purity helium-neon gas. The ultra-low temperature neon-helium dewar tank with a three-layer insulation structure is a high vacuum dewar tank specially developed to match the ultra-low temperature neon-helium purification system. The existing high vacuum dewar tank has average thermal insulation performance and is not convenient to disassemble, which is insufficient. Utility Model Content

[0003] The utility model aims to solve the above technical problems and provides an ultra-low temperature neon-helium dewar tank with a three-layer insulation structure.

[0004] The technical solution of the utility model is as follows: an ultra-low temperature neon-helium Dewar tank with a three-layer insulation structure, comprising an outer shell and an inner container shell, a plurality of legs being arranged at the bottom of the outer shell, an inner container vacuum tube being arranged on the inner container shell, one end of which protrudes from the outer shell, and a liquid nitrogen sandwich shell, a flange cover and a flange, the liquid nitrogen sandwich shell being arranged between the outer shell and the inner container shell, a liquid nitrogen inlet and outlet pipe being arranged on the liquid nitrogen sandwich shell, one end of which protrudes from the outer shell, the outer shell, the inner container shell and the top of the liquid nitrogen sandwich shell are all connected to the flange, the flange cover is detachably connected to the flange, and the flange cover is connected to a purification system.

[0005] Preferably, the outer shell is provided with a plurality of outer shell reinforcement rings.

[0006] Preferably, a plurality of inner container reinforcement rings are provided on the inner container shell.

[0007] Preferably, the flange cover is connected to the flange by bolts.

[0008] Preferably, it also includes insulation paper, which is arranged between the outer shell and the liquid nitrogen sandwich shell.

[0009] The beneficial effects of the utility model are as follows: in the utility model, a liquid nitrogen sandwich shell is added between the outer shell and the inner container shell of the Dewar tank, and liquid nitrogen is added between the inner container shell and the liquid nitrogen sandwich shell, so that the overall thermal insulation performance of the tank body is increased; at the same time, the flange cover is detachably connected to the flange, which is convenient for disassembly and installation; and the purification system is connected to the flange, which is also convenient for putting in and taking out the purification system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1It is a schematic diagram of the overall structure of a preferred embodiment of the utility model;

[0011] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0012] Reference numerals: outer shell 10 , support leg 101 , outer shell reinforcement ring 102 , inner container shell 2 , inner container vacuum tube 201 , inner container reinforcement ring 202 , liquid nitrogen sandwich shell 3 , flange cover 4 , flange 5 , thermal insulation paper 6 . DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] Reference Figure 1 to Figure 2 , an ultra-low temperature neon-helium dewar tank with a three-layer insulation structure, comprising an outer shell 10 and an inner container shell 2, wherein the bottom of the outer shell 10 is provided with a plurality of legs 101, the inner container shell 2 is provided with an inner container vacuum tube 201, one end of which extends out of the outer shell 10, and further comprising a liquid nitrogen sandwich shell 3, a flange cover 4 and a flange 5, wherein the liquid nitrogen sandwich shell 3 is arranged between the outer shell 10 and the inner container shell 2, the liquid nitrogen sandwich shell 3 is provided with a liquid nitrogen inlet and outlet pipe 301, one end of which extends out of the outer shell 10, the tops of the outer shell 10, the inner container shell 2 and the liquid nitrogen sandwich shell 3 are all connected to the flange 5, the flange cover 4 is detachably connected to the flange 5, and the flange cover 4 is connected to a purification system. In the utility model, the purification system is placed in the inner container shell 2. After the flange cover 4 is connected to the flange 5, the outer shell 10, the inner container shell 2 and the liquid nitrogen sandwich shell 3 are sealed. The inner container shell 2 is evacuated through the inner container vacuum tube 201 to prevent the cold of the ultra-low temperature neon-helium purification system from being transferred to the outside through the gas medium. Liquid nitrogen is added through the liquid nitrogen inlet and outlet pipe 301. The liquid nitrogen absorbs the heat introduced from the outside and prevents the heat from being transferred to the inner container shell 2, thereby improving the overall thermal insulation performance of the tank body. The purification system and the flange 5 are removed to facilitate the removal of the purification system. Specifically, an air pipe is provided on the outer shell 10, and the area between the outer shell 10 and the liquid nitrogen sandwich shell 3 is evacuated through the air pipe to form high vacuum insulation.

[0015] As a preferred embodiment of the utility model, it may also have the following additional technical features:

[0016] In this embodiment, a plurality of outer shell reinforcement rings 102 are provided on the outer shell body 10 to reduce the wall thickness of the outer shell body 10 .

[0017] In this embodiment, a plurality of inner container reinforcement rings 202 are provided on the inner container shell 2 to reduce the wall thickness of the inner container shell 2 .

[0018] In this embodiment, the flange cover 4 and the flange 5 are connected by bolts, which is convenient for disassembly and installation.

[0019] In this embodiment, the heat insulating paper 6 is also included, which is arranged between the outer shell 10 and the liquid nitrogen sandwich shell 3, and the heat insulating paper 6 plays the role of isolating heat radiation and heat preservation. Specifically, the heat insulating paper 6 is wrapped on the liquid nitrogen sandwich shell 3.

[0020] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0021] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-low temperature neon-helium dewar with a three-layer insulation structure, comprising an outer shell (10) and an inner container shell (2), wherein the outer shell (10) is provided with a plurality of legs (101) at the bottom, and the inner container shell (2) is provided with an inner container vacuum tube (201), one end of which protrudes from the outer shell (10), characterized in that: The invention also comprises a liquid nitrogen sandwich shell (3), a flange cover (4) and a flange (5); the liquid nitrogen sandwich shell (3) is arranged between the outer shell (10) and the inner container shell (2); a liquid nitrogen inlet and outlet pipe (301) is provided on the liquid nitrogen sandwich shell (3), one end of which extends out of the outer shell (10); the outer shell (10), the inner container shell (2) and the top of the liquid nitrogen sandwich shell (3) are all connected to the flange (5); the flange cover (4) is detachably connected to the flange (5), and the flange cover (4) is connected to a purification system.

2. The ultra-low temperature neon-helium dewar with a three-layer insulation structure according to claim 1, characterized in that: The outer shell body (10) is provided with a plurality of outer shell reinforcement rings (102).

3. The ultra-low temperature neon-helium dewar with a three-layer insulation structure according to claim 1, characterized in that: A plurality of inner container reinforcement rings (202) are provided on the inner container shell (2).

4. The ultra-low temperature neon-helium dewar with a three-layer insulation structure according to claim 1, characterized in that: The flange cover (4) and the flange (5) are connected by bolts.

5. The ultra-low temperature neon-helium dewar with a three-layer insulation structure according to claim 1, characterized in that: It also includes a heat insulating paper (6) which is arranged between the outer shell (10) and the liquid nitrogen sandwich shell (3).

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