Liquid level monitoring and alarming device for liquid nitrogen tank

Abstract

The utility model relates to the technical field of liquid level measurement, in particular to a liquid nitrogen tank liquid level monitoring and alarming device, which comprises a first temperature measuring probe, a second temperature measuring probe, a third temperature measuring probe and a fourth temperature measuring probe, the second temperature measuring probe is arranged at a position above the first temperature measuring probe by a second length distance; the third temperature measuring probe is arranged at a position above the second temperature measuring probe at a third length distance; the temperature display is connected with the first temperature measuring probe, the second temperature measuring probe and the third temperature measuring probe through wires; and the alarm is internally provided with a first alarm unit, a second alarm unit and a third alarm unit, the first alarm unit is connected with the first temperature measurement probe, the second alarm unit is connected with the second temperature measurement probe, and the third alarm unit is connected with the third temperature measurement probe. The device solves the problems that when a traditional liquid level ruler is used for measurement, the monitoring numerical value fluctuation is large, the monitoring reading is inaccurate, and the monitoring period cannot be fixed.

Description

Technical Field

[0001] The present application relates to the field of liquid level measurement technology, and in particular to a liquid nitrogen tank liquid level monitoring and alarm device. Background Art

[0002] Liquid nitrogen, due to its extremely low temperature and excellent cooling performance, is widely used in scientific research, medical treatment, biological sample preservation and other fields. In these applications, liquid nitrogen tank level monitoring is a key step in ensuring the safe and effective use of liquid nitrogen.

[0003] The traditional liquid nitrogen level monitoring method is for workers to wear protective clothing, then stand on the top of the tank, open the tank lid, insert the liquid level gauge into the liquid nitrogen tank, and measure the liquid level through the condensation and frost point on the liquid level gauge. This allows workers to understand the liquid nitrogen level inside the tank and add liquid nitrogen in time. However, this measurement method is not accurate when measuring the liquid nitrogen level because liquid nitrogen is easy to volatilize. Secondly, when measuring with a liquid level gauge, the monitoring value often fluctuates greatly due to the influence of the operating environment and measurement method, making it difficult to provide accurate readings. Summary of the Invention

[0004] The present application aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the present application provides a liquid nitrogen tank level monitoring and alarm device, which solves the problems of large fluctuations in monitoring values ​​and inaccurate monitoring readings when measuring with traditional liquid level gauges.

[0005] A liquid nitrogen tank level monitoring and alarm device, comprising:

[0006] a first temperature measuring probe, the first temperature measuring probe being arranged inside the liquid nitrogen tank at a first length distance above the storage freezing box;

[0007] a second temperature measuring probe, the second temperature measuring probe being arranged at a second distance above the first temperature measuring probe;

[0008] a third temperature measuring probe, the third temperature measuring probe being arranged at a position a third length distance above the second temperature measuring probe;

[0009] A temperature display, the temperature display being arranged outside the liquid nitrogen tank and connected to the first temperature measuring probe, the second temperature measuring probe, and the third temperature measuring probe via wires;

[0010] An alarm is provided outside the liquid nitrogen tank, and a first alarm unit, a second alarm unit and a third alarm unit are provided inside the alarm, the first alarm unit is connected to the first temperature measuring probe through a wire, the second alarm unit is connected to the second temperature measuring probe through a wire, and the third alarm unit is connected to the third temperature measuring probe through a wire, and the alarm levels of the first alarm unit, the second alarm unit and the third alarm unit are increased in sequence.

[0011] In an optional or preferred embodiment, the first alarm unit, the second alarm unit and the third alarm unit are all alarm lights.

[0012] In an optional or preferred embodiment, the light colors of the first alarm unit, the second alarm unit and the third alarm unit are different.

[0013] In an optional or preferred embodiment, the first temperature measuring probe, the second temperature measuring probe and the third temperature measuring probe are all ultra-low temperature measuring probes.

[0014] In an optional or preferred embodiment, the first temperature measuring probe, the second temperature measuring probe and the third temperature measuring probe are all resistance temperature probes or thermocouple temperature probes.

[0015] Based on the above technical solution, the embodiment of the present application has at least the following beneficial effects: in the above technical solution, when the liquid level in the liquid nitrogen tank reaches the first temperature measuring probe, the first alarm unit in the alarm starts to alarm, when the liquid level reaches the second temperature measuring probe, the second alarm unit in the alarm starts to alarm, and when the liquid level reaches the third temperature measuring probe, the third alarm unit in the alarm starts to alarm. At the same time, the temperatures detected by the first temperature measuring probe, the second temperature measuring probe, and the third temperature measuring probe will be displayed on the temperature display. This method of monitoring the liquid level overcomes the necessity of opening the lid during liquid nitrogen monitoring and the influence of inaccurate liquid nitrogen volatilization level measurement, and the alarm device can further improve the monitoring cycle. In short, the device solves the problems of large fluctuations in monitoring values ​​and inaccurate monitoring readings when measuring with traditional liquid level gauges. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application is further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 It is a structural diagram of the liquid nitrogen tank level monitoring and alarm device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0019] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0022] In the embodiments of the present application, unless otherwise expressly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] Liquid nitrogen, due to its extremely low temperature and excellent cooling performance, is widely used in scientific research, medical treatment, biological sample preservation and other fields. In these applications, liquid nitrogen tank level monitoring is a key step in ensuring the safe and effective use of liquid nitrogen.

[0024] The traditional method of monitoring liquid nitrogen levels requires workers to wear protective clothing, then stand on top of the tank, open the tank lid, insert a level gauge into the liquid nitrogen tank, and measure the liquid level by the condensation point on the level gauge. This allows workers to understand the liquid nitrogen level inside the tank so that they can add liquid nitrogen in time. However, this measurement method is prone to inaccurate level measurements due to the volatility of liquid nitrogen. Secondly, when measuring with a level gauge, the monitored values ​​often fluctuate greatly due to the influence of the operating environment and measurement techniques, making it difficult to provide accurate readings.

[0025] Reference Figure 1 The present application provides a liquid nitrogen tank level monitoring and alarm device, including a first temperature measuring probe 100, a second temperature measuring probe 200, a third temperature measuring probe 300, a temperature display 400 and an alarm 500.

[0026] The first temperature measuring probe 100 is arranged inside the liquid nitrogen tank 600 at a first length distance above the storage cryopreservation box, the second temperature measuring probe 200 is arranged at a second length distance above the first temperature measuring probe 100, and the third temperature measuring probe 300 is arranged at a third length distance above the second temperature measuring probe 200. The temperature display 400 is arranged outside the liquid nitrogen tank 600 and is connected to the first temperature measuring probe 100, the second temperature measuring probe 200 and the third temperature measuring probe 300 through wires. The alarm 500 is arranged outside the liquid nitrogen tank 600 and is provided with a first alarm unit 510, a second alarm unit 520 and a third alarm unit 530 inside the alarm 500. The first alarm unit 510 is connected to the first temperature measuring probe 100 through a wire, the second alarm unit 520 is connected to the third temperature measuring probe through a wire, and the third alarm unit 530 is connected to the third temperature measuring probe 300 through a wire. The alarm levels of the first alarm unit 510, the second alarm unit 520 and the third alarm unit 530 are increased in sequence.

[0027] When the liquid level in the liquid nitrogen tank 600 reaches the first temperature probe 100, the first alarm unit 510 in the alarm 500 starts to alarm, when the liquid level reaches the second temperature probe 200, the second alarm unit 520 in the alarm 500 starts to alarm, and when the liquid level reaches the third temperature probe 300, the third alarm unit 530 in the alarm 500 starts to alarm. At the same time, the temperatures detected by the first temperature probe 100, the second temperature probe 200 and the third temperature probe 300 will be displayed through the temperature display 400. This method of monitoring the liquid level overcomes the necessity of opening the lid during liquid nitrogen monitoring and the influence of liquid nitrogen volatilization on inaccurate liquid level measurement, and the monitoring cycle can be further improved through the alarm device. In short, the device solves the problems of large fluctuations in monitoring values, inaccurate monitoring readings, and the inability to fix the monitoring cycle when measuring with a traditional liquid level gauge.

[0028] Specifically, in actual use, when the liquid level reaches the first temperature measuring probe 100, the first alarm unit 510 alarms, and when the liquid level reaches the second temperature measuring probe 200, only the second alarm unit 520 alarms. After the staff receives the alarm signal from the second alarm unit 520, they need to prepare to add liquid nitrogen to the liquid nitrogen tank 600. When the liquid level reaches the third temperature measuring probe 300, the third alarm unit 530 starts to alarm. At this time, the staff will add the pre-prepared liquid nitrogen to the liquid nitrogen tank 600. In the long run, a periodic report of liquid nitrogen addition will be generated through the alarm device, which is convenient for the staff to improve the monitoring cycle of liquid nitrogen and makes the monitoring cycle easy to solidify.

[0029] The first length distance is 5cm, the second length distance is 10cm, and the second length distance is 10cm.

[0030] In some embodiments, the first alarm unit 510, the second alarm unit 520, and the third alarm unit 530 are all alarm lights, and the alarm is realized by vision.

[0031] In some embodiments, the lights of the first alarm unit 510 , the second alarm unit 520 , and the third alarm unit 530 have different colors.

[0032] Specifically, the first alarm unit 510 displays a green light when an alarm is sounding, the second alarm unit 520 displays a yellow light when an alarm is sounding, and the third alarm unit 530 displays a red light when an alarm is sounding. When the staff sees the alarm 500 display a yellow light, they must prepare liquid nitrogen. When the staff sees the alarm 500 display a red light, they must add the prepared liquid nitrogen to the liquid nitrogen tank 600.

[0033] Of course, the first alarm unit 510, the second alarm unit 520 and the third alarm unit 530 can also be configured as buzzers to implement the alarm through hearing.

[0034] Specifically, buzzers are added inside the first alarm unit 510 , the second alarm unit 520 and the third alarm unit 530 . When an alarm occurs, the decibel of the buzzer inside the third alarm unit 530 is greater than the decibel of the buzzer inside the second alarm unit 520 and greater than the decibel of the buzzer inside the first alarm unit 510 .

[0035] In addition, hearing and vision can also be combined. The first alarm unit 510, the second alarm unit 520 and the third alarm unit 530 are all configured as a combination of an alarm light and a buzzer, thereby achieving visual and auditory alarms at the same time.

[0036] In some embodiments, the first temperature measuring probe 100 , the second temperature measuring probe 200 and the third temperature measuring probe 300 are all ultra-low temperature measuring probes to adapt to the ultra-low temperature environment of liquid nitrogen.

[0037] In some embodiments, the first temperature measuring probe 100 , the second temperature measuring probe 200 , and the third temperature measuring probe 300 are all resistance temperature probes or thermocouple temperature probes.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0039] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A liquid nitrogen tank level monitoring and alarm device, characterized in that: include: a first temperature measuring probe, the first temperature measuring probe being arranged inside the liquid nitrogen tank at a first length distance above the storage freezing box; a second temperature measuring probe, the second temperature measuring probe being arranged at a second distance above the first temperature measuring probe; a third temperature measuring probe, the third temperature measuring probe being arranged at a position a third length distance above the second temperature measuring probe; A temperature display, the temperature display being arranged outside the liquid nitrogen tank and connected to the first temperature measuring probe, the second temperature measuring probe, and the third temperature measuring probe via wires; An alarm, wherein the alarm is arranged outside the liquid nitrogen tank, and a first alarm unit, a second alarm unit, and a third alarm unit are provided inside the alarm, the first alarm unit is connected to the first temperature measuring probe via a wire, the second alarm unit is connected to the second temperature measuring probe via a wire, and the third alarm unit is connected to the third temperature measuring probe via a wire, and the alarm levels of the first alarm unit, the second alarm unit, and the third alarm unit are increased in sequence; The first temperature measuring probe, the second temperature measuring probe and the third temperature measuring probe are all ultra-low temperature measuring probes.

2. The liquid nitrogen tank level monitoring and alarm device according to claim 1, characterized in that: The first alarm unit, the second alarm unit and the third alarm unit are all alarm lights.

3. The liquid nitrogen tank level monitoring and alarm device according to claim 2, characterized in that: The light colors of the first alarm unit, the second alarm unit and the third alarm unit are different.

4. The liquid nitrogen tank level monitoring and alarm device according to claim 1, characterized in that: The first temperature measuring probe, the second temperature measuring probe and the third temperature measuring probe are all resistance temperature probes or thermocouple temperature probes.

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