Liquid nitrogen height measuring device for liquid nitrogen bottle

Abstract

The utility model belongs to the technical field of liquid level measurement, and discloses a liquid nitrogen height measuring device for a liquid nitrogen bottle, which comprises a supporting piece, a first magnetic piece, a floating piece and a second magnetic piece, the two ends of the supporting piece are rotatably connected to the side wall of a bottle opening of the liquid nitrogen bottle, the middle part of the supporting piece is suspended at the bottle opening of the liquid nitrogen bottle, and the supporting piece can rotate around the extending direction of the supporting piece; the first magnetic piece is connected to the middle of the supporting piece and suspended at a bottle opening of the liquid nitrogen bottle. The floating piece is placed in the liquid nitrogen bottle and floats on the liquid level of liquid nitrogen; the second magnetic part is connected to the floating part and correspondingly arranged below the first magnetic part, and when the second magnetic part floats upwards to the designated height, the first magnetic part and the supporting part are turned over under the magnetic force effect of the second magnetic part. The liquid nitrogen height measuring device can detect that the liquid level of the liquid nitrogen reaches the specified height in time, so that observation of an operator is more visual, the working difficulty of the operator is reduced, excessive liquid nitrogen adding is avoided, and the liquid nitrogen is saved.

Description

Technical Field

[0001] This utility model relates to the field of liquid level measurement technology, and in particular to a liquid nitrogen bottle liquid nitrogen height measuring device. Background Technology

[0002] When measuring the specific surface area and porosity of solid materials, nitrogen gas is typically used as a "measuring tool" to measure the surface area and pore structure, taking advantage of the adsorption properties of solid materials. This provides data such as specific surface area, total pore volume, pore size distribution, and adsorption-desorption curves. To ensure that the temperature of the material remains consistent during repeated measurements, liquid nitrogen needs to be added to the experiment to ensure that the liquid nitrogen level in the liquid nitrogen bottle remains consistent across multiple measurements.

[0003] Currently, both domestic and international measuring instruments use rod-shaped devices made of different materials to observe liquid level. The liquid level is determined by observing the frosty area on the rod. This method requires repeatedly removing and inserting the rod into the liquid nitrogen bottle, which cannot directly show the liquid level position. It requires repeated operations, and even requires pouring out the liquid nitrogen after adding too much. This not only affects the measurement results but also increases the workload of the operators.

[0004] Therefore, there is an urgent need for a liquid nitrogen bottle liquid nitrogen height measuring device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a liquid nitrogen bottle liquid nitrogen height measuring device, which can intuitively measure whether the liquid nitrogen has reached the specified height when adding liquid nitrogen to the liquid nitrogen bottle, making it easy to operate.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A liquid nitrogen level measuring device for a liquid nitrogen bottle is provided, comprising:

[0008] A support member, the two ends of which are rotatably connected to the side wall of the liquid nitrogen bottle opening, the middle part of which is suspended above the opening of the liquid nitrogen bottle, and the support member is capable of rotating about its extension direction.

[0009] A first magnetic component is connected to the middle of the support component and is suspended above the mouth of the liquid nitrogen bottle.

[0010] A floating component, which is placed inside the liquid nitrogen bottle and floats on the surface of the liquid nitrogen;

[0011] The second magnetic component is connected to the floating component and is correspondingly disposed below the first magnetic component. When the second magnetic component floats to a specified height, the first magnetic component causes the support component to flip under the magnetic force of the second magnetic component.

[0012] As an optional solution for the liquid nitrogen height measuring device for liquid nitrogen cylinders, the liquid nitrogen height measuring device for liquid nitrogen cylinders further includes a guide cylinder. One end of the guide cylinder is rotatably connected to the support member, and the other end extends into the liquid nitrogen cylinder. The first magnetic member is correspondingly disposed above the guide cylinder, and the floating member is disposed inside the guide cylinder.

[0013] As an optional solution for liquid nitrogen cylinder liquid nitrogen height measuring device, the shape of the floating component matches the cross-sectional shape of the guide cylinder, and the floating component and the guide cylinder are in clearance fit.

[0014] As an optional solution for the liquid nitrogen height measuring device for liquid nitrogen cylinders, the guide cylinder includes a cylinder body and two fixing rings, the two fixing rings being connected to the top of the cylinder body, and the support member passing through the fixing rings.

[0015] As an optional solution for the liquid nitrogen height measuring device for liquid nitrogen cylinders, the guide tube includes a cylinder body and a baffle. The baffle is connected to the bottom of the cylinder body and has several through holes.

[0016] As an alternative solution for the liquid nitrogen height measuring device for liquid nitrogen cylinders, the guide cylinder includes a cylinder body and a protrusion. The protrusion protrudes radially from the inner wall of the cylinder body and is located between the first magnetic element and the second magnetic element.

[0017] As an optional solution for the liquid nitrogen height measuring device for liquid nitrogen cylinders, the guide tube is made of polytetrafluoroethylene material.

[0018] As an optional solution for the liquid nitrogen cylinder liquid nitrogen height measuring device, the support member has an abutment plane at at least one end, and the abutment plane abuts against the liquid nitrogen cylinder.

[0019] As an optional solution for the liquid nitrogen height measuring device for liquid nitrogen cylinders, the support component includes a support rod and a frame structure. The two ends of the support rod overlap the liquid nitrogen cylinder, the frame structure is connected to the middle of the support rod, and the first magnetic component is connected to the frame structure.

[0020] As an optional solution for the liquid nitrogen height measuring device for liquid nitrogen cylinders, the first magnetic component is provided with a marking part, which is located on the top surface of the first magnetic component.

[0021] The beneficial effects of this utility model are:

[0022] This invention provides a liquid nitrogen level measuring device for a liquid nitrogen bottle. A first magnetic component is fixedly mounted on a support and suspended above the bottle opening. A second magnetic component is mounted on a floating component and placed inside the liquid nitrogen bottle, allowing it to float on the liquid nitrogen surface. When liquid nitrogen is added to the bottle, the floating component and the second magnetic component rise with the liquid level. When the second magnetic component reaches a designated height, a magnetic force is generated between the first and second magnetic components, causing the first magnetic component to rotate the support component, thus determining that the liquid level has reached the designated height and stopping the addition of liquid nitrogen. This liquid nitrogen level measuring device can promptly detect when the liquid nitrogen level reaches the designated height, making observation more intuitive for operators, reducing the workload, preventing excessive addition of liquid nitrogen, and saving on liquid nitrogen usage. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the liquid nitrogen level measuring device for liquid nitrogen bottles provided by this utility model.

[0024] In the picture:

[0025] 100. Supporting component; 110. Support rod; 120. Frame structure;

[0026] 200. First magnetic component;

[0027] 300. Floating components;

[0028] 400. Second magnetic component;

[0029] 500, Guide cylinder; 510, Cylinder body; 520, Fixing ring; 530, Baffle; 531, Through hole; 540, Protrusion. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] like Figure 1 As shown, the liquid nitrogen height measuring device for a liquid nitrogen bottle in this embodiment includes a support member 100, a first magnetic member 200, a floating member 300, and a second magnetic member 400. The two ends of the support member 100 are rotatably connected to the side wall of the bottle mouth of the liquid nitrogen bottle, and the middle part of the support member 100 is suspended above the bottle mouth of the liquid nitrogen bottle. The support member 100 can rotate around its extension direction. The first magnetic member 200 is connected to the middle part of the support member 100 and is suspended above the bottle mouth of the liquid nitrogen bottle. The floating member 300 is placed inside the liquid nitrogen bottle and floats on the surface of the liquid nitrogen. The second magnetic member 400 is connected to the floating member 300 and is correspondingly arranged below the first magnetic member 200. When the second magnetic member 400 floats to a specified height, the first magnetic member 200 drives the support member 100 to flip under the magnetic force of the second magnetic member 400.

[0035] Based on the above design, the liquid nitrogen height measuring device has a first magnetic component 200 fixedly mounted on a support component 100, with the first magnetic component 200 suspended above the bottle opening. A second magnetic component 400 is mounted on a floating component 300, which is placed inside the liquid nitrogen bottle and floats on the surface of the liquid nitrogen. When liquid nitrogen is added to the bottle, the floating component 300 and the second magnetic component 400 rise with the liquid level. When the second magnetic component 400 reaches a designated height, a magnetic force is generated between the first magnetic component 200 and the second magnetic component 400, causing the first magnetic component 200 to rotate the support component 100, thus determining that the liquid level has reached the designated height and stopping the addition of liquid nitrogen to the bottle. This liquid nitrogen height measuring device can detect when the liquid nitrogen level reaches the designated height in a timely manner, making the operation more intuitive for the operator, reducing the difficulty of the operator's work, avoiding excessive addition of liquid nitrogen, and saving liquid nitrogen usage.

[0036] In this embodiment, the support member 100 includes a support rod 110 and a frame structure 120. The two ends of the support rod 110 overlap above the liquid nitrogen bottle. Optionally, the cross-section of the support rod 110 is circular, which can reduce the resistance to the rotation of the support member 100 driven by the first magnetic component 200, thereby improving the sensitivity of the measuring device. The frame structure 120 is connected to the middle of the support rod 110, and the first magnetic component 200 is connected to the frame structure 120, facilitating the fixed installation of the first magnetic component 200 and the support member 100.

[0037] Preferably, the support member 100 has an abutment plane at at least one end, which abuts against the liquid nitrogen bottle. In this embodiment, the abutment plane is located at both ends of the support rod 110. When the support rod 110 is a circular rod, the contact between the support rod 110 and the liquid nitrogen bottle is a line contact, which is not conducive to the balance between the first magnetic component 200 and the support member 100. By setting the contact surface between the support member 100 and the liquid nitrogen bottle as a plane, the resistance to the rotation of the support rod 110 is increased, avoiding the slight vibration during the addition of liquid nitrogen from causing the first magnetic component 200 and the support rod 110 to rotate, thus affecting the measurement accuracy. Optionally, the cross-sections at both ends of the support member 100 can be set as polygons, such as quadrilaterals, hexagons, etc.

[0038] Optionally, the first magnetic component 200 is provided with an indicator portion on its top surface. When the first magnetic component 200 is flipped, the orientation of the indicator portion changes with the top surface of the first magnetic component 200, allowing the operator to more intuitively identify when the liquid level has reached the designated position. For example, the indicator portion can be a coating of a different color than the main body of the first magnetic component 200, such as a red coating, to make the color stand out and be easy to observe.

[0039] Furthermore, the liquid nitrogen bottle liquid nitrogen height measuring device also includes a guide cylinder 500, one end of which is rotatably connected to the support member 100, and the other end extends into the liquid nitrogen bottle. A first magnetic member 200 is correspondingly disposed above the guide cylinder 500, and a floating member 300 is disposed inside the guide cylinder 500.

[0040] By setting the guide cylinder 500, the range of motion of the floating component 300 is limited, preventing the floating component 300 from moving too much on the liquid surface, which would increase the distance between the first magnetic component 200 and the second magnetic component 400. This allows the floating component 300 to float directly below the first magnetic component 200, ensuring the relative distance between the first magnetic component 200 and the second magnetic component 400 and improving the sensitivity of the measuring device.

[0041] It should be noted that the material of the guide cylinder 500 needs to be non-deformable at liquid nitrogen temperature and should not affect the normal operation of the magnet. In this embodiment, the guide cylinder 500 is made of polytetrafluoroethylene (PTFE), which has excellent chemical stability, corrosion resistance, sealing performance, high lubricity and non-stickiness, electrical insulation and good anti-aging resistance, and long service life.

[0042] Optionally, the shape of the floating component 300 matches the cross-sectional shape of the guide cylinder 500, and the floating component 300 and the guide cylinder 500 are fitted with a clearance. While ensuring that the floating component 300 can float normally, the size of the floating component 300 is increased, and the gap between the edge of the floating component 300 and the inner wall of the guide cylinder 500 is reduced to prevent the floating component 300 from overturning when liquid nitrogen is added, thus ensuring the stability of the floating component 300.

[0043] Furthermore, the guide tube 500 includes a tube body 510 and a baffle 530. The baffle 530 is connected to the bottom of the tube body 510, allowing the floating component 300 to be stored in the guide tube 500. When the guide tube 500 is taken out and placed into the liquid nitrogen cylinder, the floating component 300 and the second magnetic component 400 can be taken out and placed simultaneously, reducing labor and ensuring safe use. The baffle 530 is provided with several through holes 531, which allow liquid nitrogen to flow in or out, enabling the floating component 300 to float within the guide tube 500.

[0044] Furthermore, the guide cylinder 500 also includes two fixing rings 520, which are connected to the top of the cylinder body 510. The support member 100 passes through the fixing rings 520. By lifting the support member 100, the guide cylinder 500 can be lifted, which improves the overall integrity of the measuring device and facilitates the movement and use of the measuring device.

[0045] Furthermore, the guide cylinder 500 also includes a protrusion 540, which protrudes radially from the inner wall of the cylinder body 510 and is located between the first magnetic element 200 and the second magnetic element 400. When the second magnetic element 400 rises, to prevent the magnetic attraction between the first magnetic element 200 and the second magnetic element 400 from exceeding the weight of the second magnetic element 400 and the floating element 300, thus causing the second magnetic element 400 to adhere to the first magnetic element 200, the protrusion 540 restricts the upward movement of the second magnetic element 400, ensuring the normal operation of the measuring device.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A liquid nitrogen level measuring device for a liquid nitrogen bottle, characterized in that, include: A support member (100) is provided, with both ends of the support member (100) rotatably connected to the side wall of the liquid nitrogen bottle opening, the middle part of the support member (100) being suspended above the opening of the liquid nitrogen bottle, and the support member (100) being able to rotate around its extension direction. The first magnetic component (200) is connected to the middle part of the support component (100) and is suspended above the mouth of the liquid nitrogen bottle; A floating component (300) is placed inside the liquid nitrogen bottle and floats on the surface of the liquid nitrogen. The second magnetic component (400) is connected to the floating component (300) and is correspondingly disposed below the first magnetic component (200). When the second magnetic component (400) floats to a specified height, the first magnetic component (200) drives the support component (100) to flip under the magnetic force of the second magnetic component (400).

2. The liquid nitrogen level measuring device for a liquid nitrogen bottle according to claim 1, characterized in that, The liquid nitrogen bottle liquid nitrogen height measuring device also includes a guide tube (500), one end of which is rotatably connected to the support member (100), and the other end extends into the liquid nitrogen bottle. The first magnetic member (200) is correspondingly disposed above the guide tube (500), and the floating member (300) is disposed inside the guide tube (500).

3. The liquid nitrogen level measuring device for a liquid nitrogen bottle according to claim 2, characterized in that, The shape of the floating component (300) matches the cross-sectional shape of the guide cylinder (500), and the floating component (300) and the guide cylinder (500) are in clearance fit.

4. The liquid nitrogen level measuring device for a liquid nitrogen bottle according to claim 2, characterized in that, The guide cylinder (500) includes a cylinder body (510) and two fixing rings (520). The two fixing rings (520) are connected to the top of the cylinder body (510), and the support member (100) passes through the fixing rings (520).

5. The liquid nitrogen level measuring device for a liquid nitrogen bottle according to claim 2, characterized in that, The guide cylinder (500) includes a cylinder body (510) and a baffle (530). The baffle (530) is connected to the bottom of the cylinder body (510) and has several through holes (531).

6. The liquid nitrogen level measuring device for a liquid nitrogen bottle according to claim 2, characterized in that, The guide cylinder (500) includes a cylinder body (510) and a protrusion (540). The protrusion (540) protrudes radially from the inner wall of the cylinder body (510) and is located between the first magnetic element (200) and the second magnetic element (400).

7. The liquid nitrogen level measuring device for a liquid nitrogen bottle according to claim 2, characterized in that, The guide tube (500) is made of polytetrafluoroethylene material.

8. The liquid nitrogen level measuring device for a liquid nitrogen bottle according to claim 1, characterized in that, The support member (100) has an abutment plane at at least one end, and the abutment plane abuts against the liquid nitrogen bottle.

9. The liquid nitrogen level measuring device for a liquid nitrogen bottle according to claim 1, characterized in that, The support member (100) includes a support rod (110) and a frame structure (120). The two ends of the support rod (110) overlap the liquid nitrogen bottle. The frame structure (120) is connected to the middle of the support rod (110). The first magnetic element (200) is connected to the frame structure (120).

10. The liquid nitrogen level measuring device for a liquid nitrogen bottle according to claim 1, characterized in that, The first magnetic component (200) is provided with an identification part, which is disposed on the top surface of the first magnetic component (200).

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