Liquid nitrogen supply device provided with vacuum interlayer pipeline

Abstract

The utility model discloses a liquid nitrogen supply device with a vacuum interlayer pipeline. The liquid nitrogen supply device is provided with a touch operation screen (1), an operation board (2), a vacuumizing pump (6) and a gas-liquid separator (3), the gas-liquid separator is provided with a liquid inlet pipe orifice (31) and a liquid supply pipe orifice (32), the liquid inlet pipe orifice is communicated with a liquid nitrogen supply source through a liquid nitrogen conveying pipeline, and the liquid supply pipe orifice is communicated to a liquid nitrogen demand point through the liquid nitrogen conveying pipeline; a vacuum interlayer is arranged on the pipe wall of the liquid nitrogen conveying pipeline and communicated with a suction opening of the vacuumizing pump. And the vacuumizing pump is controlled by the operation board. According to the liquid nitrogen supply device, the vacuumizing pump is adopted to vacuumize the vacuum interlayer of the liquid nitrogen conveying pipeline, and the vacuum degree of the vacuum interlayer is maintained by controlling the vacuumizing pump, so that the liquid nitrogen conveying pipeline is always good in heat insulation and heat preservation effect, and the service life of the liquid nitrogen conveying pipeline is prolonged; and the situation that liquid nitrogen supply is interrupted is avoided.

Description

Technical Field

[0001] The utility model relates to a liquid nitrogen supply technology, in particular to a liquid nitrogen supply device provided with a vacuum interlayer pipeline. Background Art

[0002] Biological samples in a biological sample bank need to be preserved at extremely low temperatures. Currently, liquid nitrogen is mainly used to achieve low-temperature preservation. For this purpose, a liquid nitrogen supply device is specially provided for the biological sample bank, and a liquid nitrogen delivery pipeline is provided between the liquid nitrogen supply device and the biological sample bank. The liquid nitrogen supply device delivers liquid nitrogen to the biological sample bank through the liquid nitrogen delivery pipeline.

[0003] At present, the liquid nitrogen delivery pipeline adopts a pipeline with a vacuum wall insulation, that is, a vacuum interlayer is arranged on the wall of the pipeline to achieve the effect of thermal insulation.

[0004] The current problem is that the vacuum interlayer of the existing liquid nitrogen delivery pipeline is vacuumed and sealed once, that is, the vacuum interlayer of the liquid nitrogen delivery pipeline is vacuumed and sealed in advance when it is finished, and then it is put into use. During use, the vacuum interlayer cannot be repeatedly vacuumed. If the vacuum interlayer of the liquid nitrogen delivery pipeline leaks due to aging, resulting in a decrease in the vacuum degree of the vacuum interlayer, the thermal insulation performance of the liquid nitrogen delivery pipeline will deteriorate, and such a liquid nitrogen delivery pipeline can only be scrapped and replaced with a new one. In this way, not only will the liquid nitrogen delivery pipeline be wasted, but also, in the process of updating the liquid nitrogen delivery pipeline, the entire liquid nitrogen supply device has to stop running, resulting in an interruption in the supply of liquid nitrogen, and it is impossible to effectively guarantee the demand for liquid nitrogen for biological samples in the biological sample library. Summary of the invention

[0005] The utility model aims to provide a liquid nitrogen supply device provided with a vacuum interlayer pipeline, in which a vacuum pump is used to evacuate the vacuum interlayer of the liquid nitrogen delivery pipeline, and the vacuum degree of the vacuum interlayer is maintained by controlling the vacuum pump.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] A liquid nitrogen supply device provided with a vacuum interlayer pipeline, the liquid nitrogen supply device is provided with a touch operation screen, an operation panel, a vacuum pump and a gas-liquid separator; the gas-liquid separator has a liquid inlet pipe opening and a liquid supply pipe opening, the liquid inlet pipe opening is connected with a liquid nitrogen supply source through a liquid nitrogen delivery pipeline, and the liquid supply pipe opening is connected to a liquid nitrogen demand point through the liquid nitrogen delivery pipeline; a vacuum interlayer is provided on the pipe wall of the liquid nitrogen delivery pipeline, and the vacuum interlayer is connected with a suction port of a vacuum pump; the vacuum pump is controlled by the operation panel.

[0008] Furthermore, the gas-liquid separator is provided with a safety pressure relief pipe outlet, and a safety valve is provided on the safety pressure relief pipe outlet.

[0009] Furthermore, an exhaust heater is provided on the exhaust pipe outlet of the gas-liquid separator.

[0010] Furthermore, a one-way valve is provided at the vacuum outlet of the liquid nitrogen delivery pipeline.

[0011] Furthermore, a vacuum degree detection instrument is provided on the liquid nitrogen delivery pipeline, and the vacuum degree detection instrument is used to detect the vacuum degree in the vacuum interlayer; the vacuum degree detection instrument is connected to the touch operation screen and the operation panel via electrical signals.

[0012] Furthermore, the liquid nitrogen demand point is the biological sample bank.

[0013] Compared with the prior art, the liquid nitrogen supply device of the utility model has the following beneficial effects:

[0014] In the liquid nitrogen supply device of the utility model, a vacuum pump is used to evacuate the vacuum interlayer of the liquid nitrogen delivery pipeline, and the vacuum degree of the vacuum interlayer is maintained by controlling the vacuum pump, thereby ensuring that the liquid nitrogen delivery pipeline always has good thermal insulation and heat preservation effects. In this way, not only can the service life of the liquid nitrogen delivery pipeline be extended, material costs are saved, but also the interruption of liquid nitrogen supply is avoided, effectively ensuring a continuous and stable supply of liquid nitrogen to liquid nitrogen demand points. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a liquid nitrogen supply device with a vacuum sandwich pipe according to the present invention. DETAILED DESCRIPTION

[0016] The utility model is further described below with specific embodiments:

[0017] See also Figure 1 This embodiment provides a liquid nitrogen supply device with a vacuum interlayer pipeline, which consists of three parts: a human-computer interaction part (such as Figure 1 Indicated by arrow A), vacuum pump part (such as Figure 1 The middle arrow B indicates the position) and the liquid supply portion (such as Figure 1 (indicated by arrow C in the figure).

[0018] The human-machine interaction part is provided with a touch operation screen 1 and an operation panel 2, and the operation panel 2 is provided with numerous indicator lights and buttons. All electrical facilities in the liquid nitrogen supply device are controlled by the touch operation screen 1 and the operation panel 2 at the human-machine interaction part, such as the vacuum pump 6 provided in the vacuum pump part mentioned later, various valves, exhaust heater 34, stop valve, safety valve 351, etc. provided in the liquid supply part, which are all controlled by the touch operation screen 1 and the operation panel 2 at the human-machine interaction part. In other words, the touch operation screen 1 and the operation panel 2 at the human-machine interaction part are used to realize the whole process control of the entire liquid nitrogen supply device.

[0019] The vacuum pump unit is provided with a plurality of vacuum pumps 6, which are used to perform vacuum operation on the vacuum interlayer of the liquid nitrogen delivery pipeline (described later). The start and stop operation of the vacuum pumps 6 are controlled by the operation panel 2 of the human-machine interaction unit.

[0020] The liquid supply part is provided with a gas-liquid separator 3. The function of the gas-liquid separator 3 is to receive liquid nitrogen supplied by a liquid nitrogen supply source, and then perform gas-liquid separation on the received liquid nitrogen to remove bubbles in the liquid nitrogen and ensure that pure liquid nitrogen is supplied to the outside.

[0021] The gas-liquid separator 3 is provided with three lower pipe openings, which are a liquid inlet pipe opening 31 and two liquid supply pipe openings 32 . The three lower pipe openings are all provided with stop valves.

[0022] The liquid inlet pipe port 31 is used to communicate with a liquid nitrogen supply source to obtain liquid nitrogen supply.

[0023] It should be noted that the liquid nitrogen supply source generally refers to equipment or pipelines that can supply liquid nitrogen, such as a nitrogen generator.

[0024] The liquid supply pipe opening 32 is used to be connected to a liquid nitrogen demand point, so as to supply liquid nitrogen to the outside.

[0025] In this embodiment, the liquid nitrogen demand point is a biological sample library, and the liquid supply pipe port 32 is connected to the biological sample library, so as to supply liquid nitrogen to the biological sample library.

[0026] It should be noted that "the liquid inlet pipe port 31 and the liquid nitrogen supply source" and "the liquid supply pipe port 32 and the liquid nitrogen demand point" are both connected through a dedicated liquid nitrogen delivery pipeline, and a vacuum interlayer is provided on the pipe wall of the liquid nitrogen delivery pipeline.

[0027] The gas-liquid separator 3 is provided with a safety pressure relief pipe port 35, which is an upper pipe port on the gas-liquid separator 3, and a safety valve 351 is also provided on the safety pressure relief pipe port 35. The safety pressure relief pipe port 35 is used to "discharge some gas when the internal pressure of the gas-liquid separator 3 is too high to ensure the safety pressure inside the gas-liquid separator 3".

[0028] The gas-liquid separator 3 is provided with an exhaust pipe port 38 , which is an upper pipe port on the gas-liquid separator 3 and is used to exhaust the gas separated by the gas-liquid separator 3 .

[0029] An exhaust heater 34 is also disposed on the exhaust pipe port 38. When the exhaust pipe port 38 discharges gas, the exhaust heater 34 can heat the discharged gas, thereby preventing the exhaust gas from affecting the ambient temperature.

[0030] It should be noted that the lower pipe opening refers to the pipe opening located at the lower part of the gas-liquid separator 3, and the lower pipe opening is at the position corresponding to the liquid zone of the gas-liquid separator 3; the upper pipe opening refers to the pipe opening located at the upper part of the gas-liquid separator 3, and the upper pipe opening is at the position corresponding to the gas zone of the gas-liquid separator 3.

[0031] A vacuum pipe 9 is also provided for the liquid nitrogen delivery pipeline connected to the liquid inlet pipe 31 and the liquid supply pipe 32. The vacuum interlayer of the liquid nitrogen delivery pipeline is connected to the suction port of the vacuum pump 6 in the vacuum pump part through the vacuum pipe 9, so that the vacuum pump 6 can vacuum the vacuum interlayer of the liquid nitrogen delivery pipeline through the vacuum pipe 9, thereby achieving the purpose of "maintaining the vacuum degree inside the vacuum interlayer".

[0032] Specifically, the vacuum pipe 9 has a plurality of openings, and these openings are respectively connected to various liquid nitrogen delivery pipes and the vacuum pump 6 .

[0033] It should be noted that, in the human-machine interaction part, by operating the operating panel 2 to control the start and stop of the vacuum pump 6, the vacuum degree in the vacuum interlayer of the liquid nitrogen delivery pipeline can be controlled, thereby ensuring that the vacuum degree in the vacuum interlayer meets the required requirements.

[0034] It should be noted that all valves involved in this embodiment are manual-automatic, that is, they can be controlled manually and automatically according to control signals, including stop valves and safety valves 351 .

[0035] The working principle of the liquid nitrogen supply device of this embodiment is as follows:

[0036] Under normal circumstances, the liquid nitrogen supplied by the liquid nitrogen supply source flows to the liquid nitrogen demand point after the gas-liquid separation treatment of the gas-liquid separator 3 to meet the liquid nitrogen demand. In the whole process, the liquid nitrogen is transported and transferred through a liquid nitrogen delivery pipeline with a vacuum interlayer. When the vacuum degree of the vacuum interlayer of the liquid nitrogen delivery pipeline is lower than the preset standard threshold, its thermal insulation effect will deteriorate, and the vacuum pump 6 of the vacuum pump part is controlled to start, and the vacuum interlayer of the liquid nitrogen delivery pipeline is vacuumed. When the vacuum degree of the vacuum interlayer reaches the requirement, the vacuum pump 6 is controlled to be shut down. The vacuum degree of the vacuum interlayer is maintained by controlling the vacuum pump 6, so that the liquid nitrogen delivery pipeline maintains good thermal insulation effect.

[0037] It should be noted that a vacuum pipe port is provided on the liquid nitrogen delivery pipeline, and the vacuum pipe port is connected to the vacuum interlayer. The vacuum pipe 9 is actually connected to the vacuum pipe port of the liquid nitrogen delivery pipeline, thereby realizing the previously mentioned "the vacuum interlayer of the liquid nitrogen delivery pipeline is connected to the suction port of the vacuum pump 6 in the vacuum pump part through the vacuum pipe 9".

[0038] In addition, in order to maintain the vacuum degree of the vacuum interlayer of the liquid nitrogen delivery pipeline, a one-way valve is also provided at the vacuum pipe opening, so that when the vacuum pump 6 stops vacuuming, the vacuum interlayer of the liquid nitrogen delivery pipeline can maintain the vacuum for a longer time.

[0039] In order to realize "automatically maintaining the vacuum degree in the vacuum interlayer", a vacuum degree detection instrument is also provided on the liquid nitrogen delivery pipeline, and the vacuum degree detection instrument is used to detect the vacuum degree in the vacuum interlayer, thereby providing data support for the automatic start and stop timing selection of the vacuum pump 6. The vacuum degree detection instrument is electrically connected to the touch operation screen 1 and the operation panel 2, so that the touch operation screen 1 can receive the detection signal of the vacuum degree detection instrument, and then automatically control the start and stop operation of the vacuum pump 6 according to the detection signal, so as to automatically maintain the vacuum degree in the vacuum interlayer.

[0040] In the liquid nitrogen supply device of the present embodiment, a liquid nitrogen delivery pipeline with a vacuum interlayer is used to realize the delivery and transfer of liquid nitrogen, and a vacuum pump 6 is also provided for the liquid nitrogen delivery pipeline. The vacuum pump 6 is used to evacuate the vacuum interlayer of the liquid nitrogen delivery pipeline, and the vacuum degree of the vacuum interlayer is maintained by controlling the vacuum pump 6 to ensure that the liquid nitrogen delivery pipeline has good thermal insulation effect.

[0041] In addition, the vacuum detection instrument on the liquid nitrogen delivery pipeline can monitor the vacuum degree in the vacuum interlayer in real time, and the touch operation screen 1 can automatically control the start and stop operation of the vacuum pump 6 according to the detection signal of the vacuum detection instrument, thereby automatically maintaining the vacuum degree in the vacuum interlayer.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid nitrogen supply device provided with a vacuum interlayer pipe, characterized in that: The liquid nitrogen supply device is provided with a touch operation screen (1), an operation panel (2), a vacuum pump (6) and a gas-liquid separator (3); The gas-liquid separator (3) comprises a liquid inlet pipe opening (31) and a liquid supply pipe opening (32), wherein the liquid inlet pipe opening (31) is connected to a liquid nitrogen supply source via a liquid nitrogen delivery pipeline, and the liquid supply pipe opening (32) is connected to a liquid nitrogen demand point via a liquid nitrogen delivery pipeline; A vacuum interlayer is provided on the pipe wall of the liquid nitrogen delivery pipe, and the vacuum interlayer is connected to the suction port of the vacuum pump (6); The vacuum pump (6) is controlled by the operating panel (2).

2. The liquid nitrogen supply device provided with a vacuum sandwich pipe according to claim 1, characterized in that: The gas-liquid separator (3) is provided with a safety pressure relief pipe port (35), and a safety valve (351) is provided on the safety pressure relief pipe port (35).

3. The liquid nitrogen supply device provided with a vacuum sandwich pipe according to claim 1, characterized in that: An exhaust heater (34) is provided on the exhaust pipe port (38) of the gas-liquid separator (3).

4. The liquid nitrogen supply device provided with a vacuum sandwich pipe according to claim 1, characterized in that: A one-way valve is provided at the vacuum outlet of the liquid nitrogen delivery pipeline.

5. The liquid nitrogen supply device provided with a vacuum sandwich pipe according to claim 1, characterized in that: The liquid nitrogen delivery pipeline is provided with a vacuum degree detection instrument, which is used to detect the vacuum degree in the vacuum interlayer; the vacuum degree detection instrument is connected to the touch operation screen (1) and the operation panel (2) via electrical signals.

6. The liquid nitrogen supply device provided with a vacuum sandwich pipe according to claim 1, characterized in that: Liquid nitrogen demand point is the biological sample bank.

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