Magnetic suspension based pail guide mechanism and liquid nitrogen storage tank

Abstract

The utility model discloses a kind of bucket guiding mechanism based on magnetic suspension, it includes: magnetic ring, it is set in the neck pipe outer wall of liquid nitrogen storage tank, and coaxially with neck pipe setting;The magnetic ring has radial magnetic field gradient;Annular superconducting block is set on the bucket of liquid nitrogen storage tank, and the barrel body of annular superconducting block is coaxially arranged with bucket;The magnetic ring includes several permanent magnets, and all permanent magnets are in Halbach array distribution.The utility model generates the non-contact magnetic force of magnetic ring and annular superconducting block, realizes the automatic centering and stable guidance of bucket in narrow neck pipe area, prevent bucket from colliding neck pipe, significantly improve operation safety, smoothness and equipment life.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid nitrogen storage equipment, specifically to a magnetic levitation-based bucket lifting guide mechanism and a liquid nitrogen storage tank. Background Technology

[0002] The carrying bucket is an important component of liquid nitrogen storage tanks, used to store test tubes containing cells. For example... Figure 1 As shown, when the bucket needs to be removed from the liquid nitrogen storage tank, the operator must first slightly lift the bucket to disengage the hook at the top of the bucket from the hanging opening on the tank opening, then move the bucket horizontally to the center of the tank, and finally lift it upwards. Moving the bucket to the center prevents it from colliding with the neck of the tank during lifting, which could damage the neck, cause liquid nitrogen to splash, or affect the cells inside. Because the neck has a relatively small diameter and a long length, the operator needs to smoothly control the bucket's position to prevent it from colliding with the inner wall of the neck, which is not easy, especially for inexperienced operators. Therefore, this application proposes a magnetic levitation-based bucket guiding mechanism and a liquid nitrogen storage tank. Utility Model Content

[0003] This application provides a magnetic levitation-based bucket lifting and guiding mechanism and a liquid nitrogen storage tank, which achieves automatic centering and stable guidance of the bucket in a narrow neck area through non-contact magnetic force, significantly improving operational safety, smoothness and equipment life, and effectively solving the above-mentioned problems.

[0004] The objective of this utility model is achieved through the following technical solution: a bucket-lifting guide mechanism based on magnetic levitation, comprising:

[0005] A magnetic ring is disposed on the outer wall of the neck tube of a liquid nitrogen storage tank and is coaxially arranged with the neck tube; the magnetic ring has a radial magnetic field gradient;

[0006] A ring-shaped superconducting block is installed on the bucket of a liquid nitrogen storage tank, and the ring-shaped superconducting block is coaxially arranged with the bucket body.

[0007] The magnetic ring comprises several permanent magnets, all of which are distributed in a Heilbeck array.

[0008] A protective cover is provided on the outside of the magnetic ring.

[0009] The annular superconducting block is disposed on the outer wall of the bucket or at the bottom of the bucket.

[0010] The bucket is provided with an annular groove, and the annular superconducting block is installed in the annular groove.

[0011] The bucket is provided with a protective layer for enclosing the annular superconducting block in an annular groove.

[0012] This utility model also discloses a liquid nitrogen storage tank, which has the above-mentioned magnetic levitation-based bucket lifting guide mechanism.

[0013] Compared with the prior art, this application has the following beneficial effects: This utility model realizes automatic centering and stable guidance of the bucket in the narrow neck tube area by non-contact magnetic force generated by the magnetic ring and the annular superconducting block, preventing the bucket from colliding with the neck tube, and significantly improving the safety, smoothness and life of operation.

[0014] Some of the additional features of this application will be described in the following description. These additional features will become apparent to those skilled in the art upon examination of the following description and the accompanying drawings, or upon understanding the production or operation of the embodiments. The features disclosed in this application can be implemented and achieved through the practice or use of various methods, means, and combinations thereof with respect to the specific embodiments described below. Attached Figure Description

[0015] The accompanying drawings, which are provided to further illustrate this application and constitute a part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute a limitation thereof. In the drawings, the same reference numerals denote the same components.

[0016] Figure 1 This is a diagram illustrating the process of removing the bucket from the liquid nitrogen storage tank.

[0017] Figure 2 This is a schematic diagram showing the arrangement of the magnetic ring and the annular superconducting block of this utility model.

[0018] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0019] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0020] The reference numerals in the above figures are: 1-neck tube, 2-magnetic ring, 3-protective cover, 4-lifting bucket, 5-ring-shaped superconducting block, 6-protective layer. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments.

[0022] Example

[0023] like Figure 2 As shown, this embodiment discloses a bucket-lifting guide mechanism based on magnetic levitation, including a magnetic ring 2 and an annular superconducting block 5. The magnetic ring 2 is disposed on the outer wall of the neck tube 1 of the liquid nitrogen storage tank and is coaxially disposed with the neck tube 1; the annular superconducting block 5 is disposed on the bucket 4 of the liquid nitrogen storage tank and is coaxially disposed with the bucket body of the bucket 4.

[0024] Specifically, the magnetic ring 2 comprises several radially magnetized sector-shaped NdFeB magnets, all arranged in a Halebeck array, thus giving the magnetic ring 2 a radial magnetic field gradient. Additionally, a protective cover 3 is provided on the outside of the magnetic ring 2, meaning the magnetic ring 2 is enclosed within the protective cover 3, such as... Figure 3 As shown. The protective cover 3 can be made of stainless steel, and it can be fixed to the outer wall of the neck tube 1 with screws. A sealing gasket can be placed between the protective cover 3 and the neck tube 1. The protective cover 3 can serve to fix and protect the magnetic ring 2.

[0025] In specific settings, the magnetic ring 2 can be attached to the lower part of the middle of the neck tube 1 to ensure the magnetic field at the lower part of the neck tube 1.

[0026] The annular superconducting block 5 is disposed on the outer wall or bottom of the bucket 4; in this embodiment, it is disposed on the outer wall of the bucket. Specifically, the outer wall of the bucket 4 has an annular groove, and the annular superconducting block 5 is installed within the annular groove. Additionally, the bucket 4 is provided with a protective layer 6 for sealing the annular superconducting block 5 within the annular groove. That is, after the annular superconducting block 5 is installed within the annular groove, the protective layer 6 is then placed over the annular groove, thereby sealing the annular superconducting block 5 within the annular groove. Figure 4 As shown.

[0027] The annular superconducting block 5 can be made of YBCO metamaterial, which enters the superconducting state after being immersed in the cryogenic environment of liquid nitrogen. The protective layer 6 is made of stainless steel or epoxy resin, and under the protection of the protective layer 6, the annular superconducting block 5 will not be subject to mechanical damage or contamination.

[0028] It should be noted that the thickness of the protective cover 3 and the protective layer 6 can be set to be thinner to ensure magnetic field penetration.

[0029] When the bucket 4 is immersed in liquid nitrogen, the annular superconducting block 5 is cooled to a superconducting state. As the bucket 4 is lifted upwards, the annular superconducting block 5 gradually approaches the magnetic ring 2 on the outside of the neck tube 1. The annular superconducting block 5 senses the radial gradient magnetic field generated by the magnetic ring 2. Due to the Meissner effect, the annular superconducting block 5 generates a mirror magnetic field, repelling the magnetic ring 2. This repulsive force automatically generates a restoring force when the bucket 4 deviates from the central axis of the neck tube 1. If the bucket 4 is tilted to one side, the annular superconducting block 5 on that side is closer to the magnetic field and experiences a greater repulsive force, thus pushing the bucket 4 back to the centerline position of the neck tube 1. Under the action of the antimagnetic repulsive force, the bucket 4 is stabilized non-contactly on the central axis of the neck tube 1, preventing the bucket 4 from colliding with the neck tube 1 during the lifting process.

[0030] This embodiment relies entirely on magnetic force for guidance and collision avoidance, eliminating problems such as friction, scratching, jamming, and wear. It can automatically correct slight eccentricity or tilt of the bucket, guiding it back to the central axis of the neck tube without requiring the operator to precisely align the bucket 4 with the neck tube 1. When the bucket 4 passes through the area of ​​the neck tube 1, the operator only feels the vertical magnetic levitation force (manifested as the bucket becoming lighter or requiring a slightly greater force to overcome the repulsive force), with no lateral frictional resistance, making operation smoother. It has no parts that rub against each other, resulting in an extremely long system lifespan, very low maintenance requirements, and insensitivity to slight shaking of the bucket. The levitation force can effectively suppress shaking, making it more adaptable.

[0031] This embodiment also discloses a liquid nitrogen storage tank having the above-described magnetic levitation-based bucket lifting guide mechanism.

[0032] It should be noted that all features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any way, except for mutually exclusive features and / or steps.

[0033] Furthermore, the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this utility model is defined by the claims and their equivalents.

Claims

1. A magnetic levitation based pail guiding mechanism, characterized in that, include: A magnetic ring (2) is disposed on the outer wall of the neck tube (1) of the liquid nitrogen storage tank and is coaxially disposed with the neck tube (1); the magnetic ring (2) has a radial magnetic field gradient; An annular superconducting block (5) is set on the bucket (4) of the liquid nitrogen storage tank, and the annular superconducting block (5) is coaxially arranged with the bucket body (4).

2. The magnetic levitation based bucket guide mechanism of claim 1, wherein, The magnetic ring (2) includes several permanent magnets, all of which are distributed in a Heilbeck array.

3. The magnetic levitation based bucket guide mechanism of claim 2, wherein, A protective cover (3) is provided on the outside of the magnetic ring (2).

4. The magnetic levitation based bucket guide mechanism of claim 1, wherein, The annular superconducting block (5) is disposed on the outer wall of the bucket (4) or at the bottom of the bucket.

5. The magnetic levitation based bucket guide mechanism of claim 1, wherein, The bucket (4) is provided with an annular groove, and the annular superconducting block (5) is installed in the annular groove.

6. The magnetic levitation based bucket guide mechanism of claim 5, wherein, The bucket (4) is provided with a protective layer (6) for enclosing the annular superconducting block (5) in the annular groove.

7. A liquid nitrogen storage tank characterized by, The bucket lifting guide mechanism based on magnetic levitation as described in any one of claims 1-6.

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