Low-temperature liquid storage tank with liquid level detection device

Abstract

The low-temperature liquid storage tank with the liquid level detection device comprises an outer tank and an inner tank, the space between the outer tank and the inner tank is in a vacuum state, and a feeding pipe is arranged on the inner tank. A partition plate is arranged on the right portion of an inner cavity of the inner tank and provided with a sliding rail, and a non-metal sliding block is arranged on the sliding rail. A second magnet is arranged on the left side of the non-metal sliding block, and an infrared distance meter is connected to the right side of the non-metal sliding block; the infrared distance meter is connected with the PLC, and the PLC is connected with the display screen; a first magnet is arranged at the right end of the floating plate; an exhaust pipe is arranged on the outer tank; a vacuum detection pipe is arranged beside the exhaust pipe; the top of the inner tank is communicated with an overflow pipe; a flow meter is arranged on the overflow pipe; a first pressure sensor is arranged at the bottom of the inner tank, a second pressure sensor is arranged at the top of the inner tank, and the output ends of the first pressure sensor and the second pressure sensor are connected with the PLC. The device has the advantages of simple structure, accurate measurement result, low failure rate and convenience in use.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature liquid storage, and more specifically to a low-temperature liquid storage tank with a liquid level detection device. Background Art

[0002] Cryogenic storage tanks mainly store cryogenic liquids such as liquid oxygen, liquid nitrogen, liquid argon and carbon dioxide. Traditional cryogenic liquid storage tanks usually use liquid level meters, flow meters and other methods to measure the amount of cryogenic liquid in the storage tank. Due to the low temperature of cryogenic liquids, their storage temperature is usually more than 100 degrees below zero. Under ultra-low temperature and long-term working conditions, sensors such as liquid level meters and flow meters are prone to failure, and this measurement method makes it difficult to determine whether the sensor is faulty or misdetected.

[0003] Therefore, there is an urgent need for a cryogenic liquid storage tank with a liquid level detection device. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a low-temperature liquid storage tank with a liquid level detection device to solve the problems in the background technology.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows.

[0006] A low-temperature liquid storage tank with a liquid level detection device comprises an outer tank and an inner tank, wherein the space between the outer tank and the inner tank is in a vacuum state, and the inner tank is provided with a feeding pipe extending out of the outer tank; a vertically arranged partition is provided on the right part of the inner cavity of the inner tank, a vertically arranged slide rail is provided on the right side of the partition, and a non-metallic slider is provided on the slide rail; a second magnet is provided on the left side of the non-metallic slider, and a vertically downward infrared rangefinder is connected to the right side of the non-metallic slider; the infrared rangefinder is connected to a PLC controller provided on the outer wall of the outer tank, and the output end of the PLC controller is connected to a display screen; a horizontally arranged floating plate is provided on the left side of the partition, and a first magnet for attracting the second magnet is provided on the right end of the floating plate; an exhaust pipe for vacuuming is provided on the outer tank, and a vacuum detection tube is provided next to the exhaust pipe; an overflow pipe is connected to the top of the inner tank, and a flow meter is provided on the overflow pipe; a first pressure sensor is provided at the bottom of the inner tank, and a second pressure sensor is provided at the top, and the output ends of the first pressure sensor and the second pressure sensor are connected to the PLC controller.

[0007] To further optimize the technical solution, a reflective plate is provided on the bottom end surface of the inner tank on the right side of the partition, and the upper end surface of the reflective plate is flush with the bottom wall of the inner tank.

[0008] To further optimize the technical solution, the outer tank is provided with a warning light and a buzzer connected to the PLC controller.

[0009] To further optimize the technical solution, a plurality of vertically arranged support rods are provided at the bottom of the inner tank, and the bottom ends of the support rods are connected to the outer tank.

[0010] To further optimize the technical solution, four support rods are provided.

[0011] To further optimize the technical solution, the floating plate is made of an extruded plate.

[0012] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0013] The utility model provides a low-temperature liquid storage tank with a liquid level detection device. The floating plate moves with the rise and fall of the liquid level, and the infrared rangefinder moves at the same time, thereby realizing the measurement of the liquid level. The measurement result is displayed on the display screen, which is convenient for viewing and recording; by setting a warning light and a buzzer, a timely prompt function is realized, and the response speed is fast. The utility model has the advantages of simple structure, accurate measurement results, low failure rate, and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Among them: 1. inner tank, 2. outer tank, 3. overflow pipe, 4. floating plate, 5. first magnet, 6. second magnet, 7. infrared rangefinder, 8. first pressure sensor, 9. second pressure sensor, 10. partition, 11. slide rail, 12. reflection plate, 13. exhaust pipe, 14. vacuum detection tube, 15. feeding pipe, 16. warning light, 17. buzzer, 18. display screen. DETAILED DESCRIPTION

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

[0017] A cryogenic liquid storage tank with a liquid level detection device, combined with Figure 1 As shown, it includes an inner tank 1, an outer tank 2, an overflow pipe 3, a floating plate 4, a first magnet 5, a second magnet 6, an infrared rangefinder 7, a first pressure sensor 8, a second pressure sensor 9, a partition 10, a slide rail 11, a reflecting plate 12, an exhaust pipe 13, a vacuum detection tube 14, a feeding pipe 15, a warning light 16, a buzzer 17, and a display screen 18.

[0018] There is a vacuum state between the outer tank 2 and the inner tank 1 to provide heat insulation. The inner tank 1 is provided with a feeding pipe 15 extending out of the outer tank 2 to facilitate the addition of cryogenic liquid into the storage tank.

[0019] A vertical partition 10 is provided on the right side of the inner cavity of the inner tank 1, and the partition 10 divides the inner cavity of the inner tank 1 into two parts, left and right. A vertical slide rail 11 is provided on the right side of the partition 10, and a non-metal slider is provided on the slide rail 11. A second magnet 6 is provided on the left side of the non-metal slider; an infrared rangefinder 7 is connected to the right side of the non-metal slider, and the infrared rangefinder 7 is vertically downwardly arranged to detect the height of the liquid in the inner tank 1.

[0020] A horizontally arranged floating plate 4 is arranged on the left side of the partition 10. The floating plate 4 is made of an extruded board to prevent water seepage, which can ensure that the extruded board floats on the liquid surface and does not cause damage such as bumps to the inner tank 1. A first magnet 5 is arranged on the right end of the floating plate 4, and the first magnet 5 is attracted to the second magnet 6. A reflecting plate 12 is arranged on the bottom end surface of the inner tank 1 located on the right side of the partition 10, and the upper end surface of the reflecting plate 12 is flush with the bottom wall of the inner tank 1, so as to facilitate accurate measurement by the infrared rangefinder 7. The infrared rangefinder 7 is connected to a PLC controller arranged on the outer wall of the outer tank 2, and the output end of the PLC controller is connected to a display screen 18 to display the liquid level detected by the infrared rangefinder 7.

[0021] The outer tank 2 is provided with an exhaust pipe 13 for evacuating a vacuum, and a vacuum detection tube 14 is provided next to the exhaust pipe 13 .

[0022] The top of the inner tank 1 is connected to an overflow pipe 3, on which a flow meter is provided to detect the amount of overflow; the flow meter is connected to a PLC controller to prompt the staff when overflow occurs.

[0023] A first pressure sensor 8 is provided at the bottom of the inner tank 1, and a second pressure sensor 9 is provided at the top, and the output ends of the first pressure sensor 8 and the second pressure sensor 9 are connected to a PLC controller. By measuring the pressure of the liquid and the pressure on the upper part of the inner tank 1, the pressure inside the inner tank 1 is controlled to ensure the normal operation of the storage tank.

[0024] The outer tank 2 is provided with a warning light 16 and a buzzer 17 connected to the PLC controller. When the liquid level is too high or the pressure is abnormal, the warning light 16 and the buzzer 17 will give warnings at the same time to facilitate the staff to respond quickly.

[0025] Four vertically arranged support rods are arranged at the bottom of the inner tank 1 , and the bottom ends of the support rods are connected to the outer tank 2 .

[0026] When the utility model is actually used, the vacuum is first drawn between the inner tank and the outer tank from the exhaust pipe until the vacuum degree reaches -6 Torr, and the vacuum degree is monitored in real time at the vacuum detection tube. The low-temperature liquid is poured into the inner tank through the feeding pipe. At the same time, the first pressure sensor and the second pressure sensor detect the pressure inside the inner tank, and the liquid level is detected by the floating plate, the first magnet, the second magnet, and the infrared rangefinder. The measurement results of the pressure and liquid level are displayed on the display screen. When there is too much liquid, the liquid flows out through the overflow pipe, and the overflow amount is measured by the flow meter.

Claims

1. A cryogenic liquid storage tank with a liquid level detection device, characterized in that: The invention comprises an outer tank (2) and an inner tank (1), wherein a vacuum state is formed between the outer tank (2) and the inner tank (1), and the inner tank (1) is provided with a feeding pipe (15) extending out of the outer tank (2); a vertically arranged partition (10) is provided on the right side of the inner cavity of the inner tank (1), a vertically arranged slide rail (11) is provided on the right side of the partition (10), and a non-metallic slider is provided on the slide rail (11); a second magnet (6) is provided on the left side of the non-metallic slider, and a vertically downward infrared rangefinder (7) is connected to the right side of the non-metallic slider; the infrared rangefinder (7) is connected to a PLC controller provided on the outer wall of the outer tank (2), and the output end of the PLC controller is connected to A display screen (18); a horizontally arranged floating plate (4) is arranged on the left side of the partition (10), and a first magnet (5) for attracting a second magnet (6) is arranged on the right end of the floating plate (4); an exhaust pipe (13) for vacuuming is arranged on the outer tank (2), and a vacuum detection tube (14) is arranged next to the exhaust pipe (13); an overflow pipe (3) is connected to the top of the inner tank (1), and a flow meter is arranged on the overflow pipe (3); a first pressure sensor (8) is arranged at the bottom of the inner tank (1), and a second pressure sensor (9) is arranged at the top, and the output ends of the first pressure sensor (8) and the second pressure sensor (9) are connected to a PLC controller.

2. A cryogenic liquid storage tank with a liquid level detection device according to claim 1, characterized in that: A reflecting plate (12) is arranged on the bottom end surface of the inner tank (1) located on the right side of the partition plate (10), and the upper end surface of the reflecting plate (12) is flush with the bottom wall of the inner tank (1).

3. A cryogenic liquid storage tank with a liquid level detection device according to claim 1, characterized in that: The outer tank (2) is provided with a warning light (16) and a buzzer (17) connected to the PLC controller.

4. A cryogenic liquid storage tank with a liquid level detection device according to claim 1, characterized in that: A plurality of vertically arranged support rods are arranged at the bottom of the inner tank (1), and the bottom ends of the support rods are connected to the outer tank (2).

5. A cryogenic liquid storage tank with a liquid level detection device according to claim 4, characterized in that: Four support rods are provided.

6. A cryogenic liquid storage tank with a liquid level detection device according to claim 1, characterized in that: The floating plate (4) is a floating plate (4) made of an extruded plate.

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