Liquid level display device

Abstract

The utility model relates to a liquid level display device which is characterized in that a floating ball which ascends and descends along with the liquid level is arranged in a tank body, a plurality of vertical guide columns are arranged around the outer edge of the floating ball, the top of the floating ball is connected with a vertically upward traction rope, and the top of the tank body is provided with a guide pipe for communicating the inside and the outside of a cavity; the end, extending out of the tank body, of the guide pipe is connected with one side of the upper end of the magnetic turning plate liquid level meter, the traction rope penetrates through the guide pipe and enters the magnetic turning plate liquid level meter, the free end of the traction rope in the magnetic turning plate liquid level meter is connected with a suspended strong magnetic block, and when the floating ball ascends and descends along with the liquid level, the strong magnetic block is driven by the traction rope to move up and down in the magnetic turning plate liquid level meter. The floating ball floats on the liquid level of liquid hydrogen, the liquid level in the tank body is fed back through the change displayed in the magnetic turning plate liquid level meter caused by the movement of the strong magnetic block connected with the traction rope, the height of the liquid level can be directly reflected, the limitation of temperature and air pressure is avoided, and the internal maintenance can be reduced as much as possible by adopting pure mechanical mechanism connection.

Description

Technical Field

[0001] This utility model relates to the field of liquid level detection and display technology, specifically to a liquid level display device in the field of cryogenic storage tanks. Background Technology

[0002] Liquid hydrogen, obtained by cooling hydrogen gas, is a colorless, odorless, high-energy cryogenic liquid fuel. The internal cavity of tanks storing liquid hydrogen is characterized by high pressure and low temperature. Commonly used level gauges, such as radar level gauges, float level gauges, differential pressure level gauges, and magnetic level gauges, cannot effectively measure the liquid hydrogen level due to the special physical properties of liquid hydrogen. For example, float level gauges require a linked mechanical device, but because the float cannot float in low-density liquid hydrogen and cannot properly link with the mechanical device, effective measurement is impossible. Differential pressure level gauges are used, but due to the extremely low density of liquid hydrogen, the pressure difference is very small, especially in horizontal storage tanks, where even a small difference in the displayed level can lead to a large error in judging the actual storage volume. If magnetic level gauges are used directly, the inherent characteristics of cryogenic liquids can cause demagnetization, rendering them ineffective. Therefore, how to effectively measure the liquid hydrogen level in tanks is a problem that needs to be solved. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a liquid level display device to solve the problem that the liquid hydrogen level in the tank is difficult to measure effectively.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A liquid level display device includes: a tank, in which a float that can rise and fall with the liquid level is placed; multiple vertical guide posts are arranged around the outer edge of the float to guide the float's rise and fall; the two ends of each guide post extend to the top and bottom surfaces of the tank, respectively; a vertically upward traction rope is connected to the top of the float; a conduit connecting the inside and outside of the tank cavity is arranged at the top of the tank corresponding to the traction rope; one end of the conduit extending outside the tank is connected to the upper side of a magnetic level gauge; the traction rope passes through the conduit and enters the magnetic level gauge; the traction rope inside the magnetic level gauge is vertically downward and its free end is connected to a suspended strong magnetic block; when the float rises and falls with the liquid level, the traction rope drives the strong magnetic block to move up and down inside the magnetic level gauge; the movement of the strong magnetic block causes a change in the display inside the magnetic level gauge, providing feedback on the liquid level in the tank.

[0006] In a preferred embodiment, the tank includes an outer cylinder and an inner cylinder nested together, with a vacuum interlayer cavity provided between the outer cylinder and the inner cylinder. The float and guide column are both located in the inner cylinder. The inner end of the guide tube is located at the top of the inner cylinder corresponding to the traction rope, the middle part of the guide tube is horizontally located in the vacuum interlayer cavity, and the outer end of the guide tube extends out of the tank body through the outer cylinder.

[0007] In a preferred embodiment, the conduit and the magnetic level gauge are respectively equipped with fixed pulleys inside, and the traction rope passes through the corners inside the conduit and the magnetic level gauge and is wound around the fixed pulleys.

[0008] As a preferred embodiment, the cross-section of the float through the vertical center of symmetry is elliptical, and the horizontal diameter of the float is greater than its vertical height.

[0009] In one preferred embodiment, the edge of the float is provided with a circular tube ring close to each guide post, and each circular tube ring is sleeved on the corresponding guide post.

[0010] As a preferred embodiment, the strong magnetic block causes the display inside the magnetic level gauge to flip as it passes from top to bottom, so that the displayed numbers on the magnetic level gauge are arranged from small to large from top to bottom.

[0011] As a preferred embodiment, the bottom of the magnetic level gauge is provided with a drain valve.

[0012] The beneficial effects of this invention are as follows: A float floats on the surface of liquid hydrogen and is connected to a strong magnetic block inside a magnetic level gauge on the outside of the tank via a traction rope. This allows for direct measurement of the liquid level, unaffected by temperature or air pressure. The vertical guide post ensures the float moves vertically, guaranteeing accurate results. Furthermore, the float's edges are encircled by a circular tube ring on the external vertical guide post, and the float's elliptical, flat shape further enhances stable floating and reduces level display deviation. The purely mechanical connection minimizes internal maintenance. Attached Figure Description

[0013] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 1 Explanation of reference numerals in the attached diagram: 1. Outer cylinder; 2. Inner cylinder; 3. Guide column; 4. Float; 5. Circular tube ring; 6. Traction rope; 7. Guide tube; 8. Fixed pulley; 9. Connecting flange; 10. Strong magnetic block; 11. Magnetic level gauge; 12. Drain valve; 13. Interlayer cavity. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0017] See Figure 1 The diagram shows a liquid level display device according to this utility model, comprising: a tank, in which a float 4 capable of rising and falling with the liquid level is placed. When the tank is filled with liquid, the float 4 floats on the liquid surface within guide columns 3, rising or falling with the liquid level. Multiple vertical guide columns 3 are arranged around the outer edge of the float 4 to guide its rise and fall. The two ends of each guide column 3 extend to the top and bottom surfaces of the tank, respectively. A vertically upward traction rope 6 is connected to the top of the float 4. A connection to the tank cavity is provided at the top of the tank corresponding to the traction rope 6. The conduit 7, used both indoors and outdoors, has one end extending outside the tank connected to the upper side of the magnetic level gauge 11 via a connecting flange 9. The traction rope 6 passes through the conduit 7 and enters the magnetic level gauge 11. The traction rope 6 inside the magnetic level gauge 11 is vertically downward and its free end is connected to a suspended strong magnetic block 10. When the float 4 rises and falls with the liquid level, it drives the strong magnetic block 10 to move up and down inside the magnetic level gauge 11 via the traction rope 6. The movement of the strong magnetic block 10 causes a change in the display inside the magnetic level gauge 11, providing feedback on the liquid level inside the tank.

[0018] Specifically, the float 4 floats on the surface of liquid hydrogen and rises and falls with the liquid level. Based on this characteristic, the float 4 is connected to the strong magnetic block 10 inside the magnetic level gauge 11 on the outside of the tank via the traction rope 6. To prevent the float 4 from drifting back and forth and to move only up and down with the liquid level, multiple vertical guide columns 3 are set around the float 4, so that the float 4 can only move vertically up and down along the guide columns within the area enclosed by the guide columns 3. In this way, the float 4 will not run around randomly. The height that the float 4 rises corresponds to the height that the strong magnetic block 10 at the other end of the traction rope 6 falls. The movement of the strong magnetic block 10 causes the magnetic flip plate inside the magnetic level gauge 11 to flip. The liquid level number corresponding to the liquid level in the tank is marked on the magnetic level gauge 11, which can reflect the liquid level in the tank.

[0019] In this embodiment, the tank includes an outer cylinder 1 and an inner cylinder 2 nested together. A vacuum interlayer cavity 13 is provided between the outer cylinder 1 and the inner cylinder 2. The float 4 and the guide column 3 are both disposed in the inner cylinder 2. The inner end of the conduit 7 is located at the top of the inner cylinder 2 corresponding to the traction rope 6. The middle part of the conduit 7 is horizontally disposed in the vacuum interlayer cavity 13, and the outer end of the conduit 7 extends out of the tank body through the outer cylinder 1. The tank for storing liquid hydrogen requires vacuum insulation to maintain a low-temperature environment, and the interlayer cavity 13 must be evacuated.

[0020] In this embodiment, fixed pulleys 8 are respectively installed inside the conduit 7 and the magnetic level gauge 11. The traction rope 6 passes through the corners inside the conduit 7 and the magnetic level gauge 11 and is wound around the fixed pulleys 8. A fixed pulley 8 is installed at the corner near the inner cavity of the tank inside the conduit 7, and at the top of the magnetic level gauge 11, which are the corners at the top of the vertical sides of the traction rope 6. In addition, fixed pulleys 8 should be installed at every corner of the conduit 7. This reduces the resistance of the traction rope 6 as it moves on the fixed pulleys 8, allowing the rise and fall of the float 4 to more quickly influence the rise and fall of the strong magnetic block 10, thus more accurately reflecting the liquid level. The fixed pulleys 8 are made of grease-free material to avoid the influence of grease on the quality of the liquid hydrogen.

[0021] In this embodiment, the cross-section of the float 4 through the vertical center of symmetry is elliptical, and the horizontal diameter of the float 4 is greater than its vertical height. This flat shape allows the float 4 to float stably on the liquid surface, making it less prone to swaying from side to side, thus resulting in more accurate measurement results.

[0022] In this embodiment, circular tube rings 5 ​​are respectively provided on the edge of the float 4 near each guide post 3, and each circular tube ring 5 is respectively fitted onto the corresponding guide post 3. In order to make the float 4 move more strictly in the vertical direction, the circular tube rings 5 ​​are provided around the float. The circular tube rings 5 ​​are fitted onto the guide posts 3 and can move up and down, reducing the influence of the left and right deviation of the float 4 on the results and making the measurement results more accurate.

[0023] In this embodiment, the strong magnetic block 10 causes the display inside the magnetic level gauge 11 to flip as it passes from top to bottom, so that the displayed numbers on the magnetic level gauge 11 are arranged from small to large from top to bottom. Due to the linkage between the float 4 and the strong magnetic block 10, their rising and falling processes are opposite, so the displayed numbers on the magnetic level gauge 11 must be reversed to reflect the true liquid level.

[0024] In this embodiment, a drain valve 12 is provided at the bottom of the magnetic level gauge 11. Due to the high-pressure environment inside the tank, the drain valve 12 can be opened, and airflow passes through the conduit 7 and the magnetic level gauge 11 to purge and clean the interior, reducing the contamination of liquid hydrogen by impurities.

[0025] The actual application process of this utility model is as follows:

[0026] As shown in Figure 1, the inner cylinder 2 and the outer cylinder 1 are fitted together. The conduit 7 passes through the interlayer cavity 13, with one end fixedly connected to the top of the inner cylinder 2 and the other end extending out of the outer cylinder 1. Inside the inner cylinder 2, a vertical guide post 3 is fixed around the float 4. Circular tube rings 5 ​​are fitted on the guide post 3, and each circular tube ring 5 is connected to the outer edge of the float 4. After the inner cylinder 2 is installed, the magnetic level gauge 11 is installed on the outside of the outer cylinder 1 and connected to the extended outer end of the conduit 7 through the connecting flange 9. After the connection is completed, the drain valve 12 is opened. High-pressure gas is present inside the inner cylinder 2. The airflow passes through the conduit 7 and the inside of the magnetic level gauge 11, blowing out the impurities inside. After the blowing is qualified, the traction rope 6 is connected to the strong magnetic block 10. Then, it is tested whether the strong magnetic block 10 can move normally inside the magnetic level gauge 11. After the test is completed, a sealing test is performed on the level measuring device. After the test is qualified, it can be operated normally.

[0027] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A liquid level display device, characterized in that, The utility model relates to a kind of liquid level measuring device, including: Tank, float ball (4) can be placed with liquid level rising and falling in tank, multiple vertical guide posts (3) for guiding float ball to rise and fall along it are arranged around the outer edge of float ball (4), both ends of each guide post (3) extend to top surface and bottom surface in tank respectively, the top of float ball (4) is connected with vertical upward traction rope (6), the top of tank is provided with duct (7) for communicating inside and outside tank cavity, the end of duct (7) extending outside tank is connected with the upper end of one side of magnetic flap liquid level meter (11), traction rope (6) passes into magnetic flap liquid level meter (11) from duct (7), traction rope (6) in magnetic flap liquid level meter (11) is vertical downward and free end is connected with suspended strong magnetic block (10), when float ball (4) rises and falls with liquid level, strong magnetic block (10) is driven to move up and down in magnetic flap liquid level meter (11) by traction rope (6), the movement of strong magnetic block (10) causes the change of display in magnetic flap liquid level meter (11), and the liquid level in tank is fed back.

2. The liquid level display device according to claim 1, characterized by The tank includes outer cylinder (1) and inner cylinder (2) sleeved together, vacuum interlayer cavity (13) is arranged between outer cylinder (1) and inner cylinder (2), float ball (4) and guide post (3) are arranged in inner cylinder (2), the inner end of duct (7) is arranged at the top of inner cylinder (2) corresponding to traction rope (6), the middle part of duct (7) is arranged horizontally in vacuum interlayer cavity (13), and the outer end of duct (7) passes through outer cylinder (1) and extends to outside the tank.

3. The liquid level display device according to claim 2, wherein The inner part of duct (7) and magnetic flap liquid level meter (11) is respectively provided with fixed pulley (8), and the corner of traction rope (6) passing through duct (7) and magnetic flap liquid level meter (11) is wound on fixed pulley (8) respectively.

4. The liquid level display device according to claim 1, 2 or 3, characterized by The cross section of float ball (4) passing through vertical symmetry center is oval, and the horizontal diameter of float ball (4) is greater than vertical height.

5. The liquid level display device according to claim 4, wherein The edge of float ball (4) is close to each guide post (3) respectively and is provided with circular tube ring (5), and each circular tube ring (5) is respectively sleeved on corresponding guide post (3).

6. The liquid level display device according to claim 1, 2 or 3, characterized by The strong magnetic block (10) causes the flip of display in magnetic flap liquid level meter (11) from top to bottom, so that the display digits of magnetic flap liquid level meter (11) are arranged from small to large from top to bottom.

7. The liquid level display device according to claim 1, 2 or 3, characterized by The bottom of magnetic flap liquid level meter (11) is provided with blowdown valve (12).

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