Switching disk device and nitrogen gas supply system

Abstract

The utility model discloses a switching disc device and a nitrogen supply system. The switching disc device is provided with a buffer tank (11), a gas supply end pipe orifice (111), a gas using end pipe orifice (112) and a recovery end pipe orifice (113), the gas supply end pipe opening is used for receiving nitrogen supplied by a nitrogen supply source, the gas using end pipe opening is used for conveying the nitrogen to nitrogen using equipment, and the recovery end pipe opening is used for being communicated with a nitrogen containing and releasing device. A switching disc device (1), a liquid nitrogen storage tank (2) and a gas-liquid separator (3) are arranged in the nitrogen supply system; the first lower pipe orifice (21) is communicated with a gas supply end pipe orifice of the switching disc device through a vaporizer (26), the fourth lower pipe orifice (31) is communicated with a third lower pipe orifice (23) of the liquid nitrogen storage tank, and the second upper pipe orifice (33) is communicated with a recovery end pipe orifice of the switching disc device. According to the switching disc device and the nitrogen supply system, nitrogen can be stably supplied to nitrogen equipment.

Description

Technical Field

[0001] The utility model relates to a process gas supply system, in particular to a switching disc device and a nitrogen supply system. Background Art

[0002] See Figure 1 , a conventional cold box seal gas continuous supply device and method for a nitrogen production line (application number CN202311401489.9). This technology ensures that the nitrogen pressure in the nitrogen production line is stable within a certain threshold through devices such as opening and closing valves at the nitrogen interface, and optimizes the operating parameters of the nitrogen generator by detecting environmental data. This technology mainly focuses on programming for the nitrogen generator. The system includes multiple facilities such as a nitrogen generator, a nitrogen storage cold box, and a backup nitrogen storage tank, and has relatively high requirements for the usage scenario and space. The valve function in this technology is relatively simple and cannot accurately regulate the nitrogen pressure in the nitrogen using pipe network. The breathing valve in this technology is a one-way valve and cannot recover the exhaled nitrogen, resulting in a certain waste.

[0003] The current problems are as follows:

[0004] 1) In the prior art, the nitrogen pressure in the nitrogen using pipe network cannot be accurately regulated;

[0005] 2) In the prior art, the exhaled nitrogen cannot be recovered, resulting in a certain waste. Summary of the Invention

[0006] The purpose of the utility model is to provide a switching disc device and a nitrogen supply system, which can stably supply nitrogen to nitrogen using equipment.

[0007] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0008] A switching disc device is provided with a buffer tank, a gas supply end pipe orifice, a gas using end pipe orifice, and a recovery end pipe orifice. The gas supply end pipe orifice, the gas using end pipe orifice, and the recovery end pipe orifice are respectively communicated with the buffer tank. The gas supply end pipe orifice is used to receive nitrogen supplied by a nitrogen supply source, the gas using end pipe orifice is used to transport nitrogen to nitrogen using equipment, and the recovery end pipe orifice is used to communicate with a nitrogen containment release device.

[0009] Further, a second pressure regulating valve, a third stop valve, and a one-way valve are sequentially arranged on the pipeline from the buffer tank to the gas supply end pipe orifice; a first pressure regulating valve and a first stop valve are sequentially arranged on the pipeline from the buffer tank to the recovery end pipe orifice; a filter is arranged on the pipeline from the buffer tank to the gas using end pipe orifice.

[0010] Further, a safety exhaust pipe orifice is arranged on the buffer tank, and a safety valve is arranged at the safety exhaust pipe orifice.

[0011] Further, a bypass exhaust pipe orifice is provided on the pipeline from the buffer tank to the recovery end pipe orifice, and a second stop valve is provided at the bypass exhaust pipe orifice.

[0012] A nitrogen supply system is provided with a switching disk device, a liquid nitrogen storage tank and a gas-liquid separator; the switching disk device is the switching disk device as described above; the liquid nitrogen storage tank is provided with a first lower pipe orifice and a third lower pipe orifice, the gas-liquid separator is provided with a fourth lower pipe orifice and a second upper pipe orifice, and a vaporizer is provided at the first lower pipe orifice of the liquid nitrogen storage tank; the first lower pipe orifice of the liquid nitrogen storage tank is communicated with the air supply end pipe orifice of the switching disk device through the vaporizer, the fourth lower pipe orifice of the gas-liquid separator is communicated with the third lower pipe orifice of the liquid nitrogen storage tank, and the second upper pipe orifice of the gas-liquid separator is communicated with the recovery end pipe orifice of the switching disk device.

[0013] Further, the gas-liquid separator further has a fifth lower pipe orifice, and the fifth lower pipe orifice of the gas-liquid separator is used for communicating to a nitrogen-using device.

[0014] Further, the liquid nitrogen storage tank further has a second lower pipe orifice and a first upper pipe orifice, and the second lower pipe orifice of the liquid nitrogen storage tank is communicated with the first upper pipe orifice of the liquid nitrogen storage tank through a vaporization pressurization facility.

[0015] Further, the housing of the liquid nitrogen storage tank is provided with a vacuum insulation layer.

[0016] Further, the nitrogen-using device is a biological sample bank.

[0017] The switching disk device of the present utility model has the following beneficial effects compared with the prior art:

[0018] 1) A switching disk device is provided between the nitrogen supply source and the nitrogen-using device, and the switching disk device can play a buffering role, so as to realize stable nitrogen supply to the nitrogen-using device;

[0019] 2) A nitrogen containment and release device is also provided for the switching disk device, so as to further ensure stable nitrogen supply to the nitrogen-using device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a cold box seal gas continuous supply device and method for a nitrogen production line in the prior art;

[0021] Figure 2 It is a schematic diagram of the switching disk device of the present utility model;

[0022] Figure 3 It is a schematic diagram of the nitrogen supply system of the present utility model. DETAILED DESCRIPTION OF THE INVENTION

[0023] The following is a further description of the present utility model with specific embodiments:

[0024] Refer to Figure 2 , this embodiment provides a switching disk device. The switching disk device 1 includes a buffer tank 11, a safety valve 12, a first pressure regulating valve 13, a first stop valve 14, a second stop valve 15, a second pressure regulating valve 16, a third stop valve 17, a check valve 18 and a filter 19.

[0025] The switching disk device 1 is provided with three pipe orifices, namely a gas supply end pipe orifice 111, a gas using end pipe orifice 112 and a recovery end pipe orifice 113. These three pipe orifices are all connected to the buffer tank 11 through pipelines.

[0026] The second pressure regulating valve 16, the third stop valve 17 and the check valve 18 are sequentially arranged on the "pipeline from the buffer tank 11 to the gas supply end pipe orifice 111". The first pressure regulating valve 13 and the first stop valve 14 are sequentially arranged on the "pipeline from the buffer tank 11 to the recovery end pipe orifice 113". The filter 19 is arranged on the "pipeline from the buffer tank 11 to the gas using end pipe orifice 112".

[0027] The buffer tank 11 is also provided with a safety exhaust pipe orifice 114, and the safety valve 12 is arranged at the safety exhaust pipe orifice 114; when the pressure in the buffer tank 11 is too high, it can be safely depressurized through the safety valve 12.

[0028] In addition, a bypass exhaust pipe orifice 115 is also arranged on the "pipeline from the buffer tank 11 to the recovery end pipe orifice 113", and the second stop valve 15 is arranged at the bypass exhaust pipe orifice 115; the function of the bypass exhaust pipe orifice 115 is bypass exhaust.

[0029] The gas supply end pipe orifice 111 is used to receive the nitrogen delivered by the nitrogen supply source. The gas supply end pipe orifice 111 is connected to the nitrogen supply source, so as to receive the nitrogen delivered by the nitrogen supply source. It should be noted that the nitrogen supply source generally refers to equipment or pipelines that can provide nitrogen supply. In this embodiment, the nitrogen supply source is a liquid nitrogen storage tank.

[0030] The gas using end pipe orifice 112 is used to transport nitrogen to the nitrogen using equipment. The gas using end pipe orifice 112 is connected to the nitrogen using equipment, so as to transport nitrogen to the nitrogen using equipment.

[0031] The recovery end pipe orifice 113 is connected to a pre-configured nitrogen containment and release device.

[0032] When the pressure of the nitrogen output by the nitrogen supply source is too low and lower than the requirement of the nitrogen using equipment, the nitrogen containment and release device can supplement nitrogen into the buffer tank 11 through the recovery end pipe orifice 113, that is, nitrogen flows from the nitrogen containment and release device to the buffer tank 11;

[0033] When the pressure of the nitrogen gas output from the nitrogen gas supply source is too high and exceeds the demand of the nitrogen-using equipment, the nitrogen gas containment and release device can recover nitrogen gas from the buffer tank 11 through the recovery end pipe orifice 113, that is, the nitrogen gas flows from the buffer tank 11 to the nitrogen gas containment and release device;

[0034] In this way, the pressure in the buffer tank 11 can be ensured to be stable, thereby ensuring a stable supply of nitrogen gas to the nitrogen-using equipment.

[0035] See Figure 3 , this embodiment also provides a nitrogen gas supply system, in which the above-mentioned switching disk device is adopted to achieve a stable nitrogen gas supply to the biobank 4 (nitrogen-using equipment).

[0036] The nitrogen gas supply system includes a liquid nitrogen storage tank 2, a gas-liquid separator 3, and the above-mentioned switching disk device 1.

[0037] The liquid nitrogen storage tank 2 serves as a nitrogen gas supply source to supply nitrogen gas to the gas supply end pipe orifice 111 of the switching disk device 1. The gas-liquid separator 3 serves as a nitrogen gas containment and release device to supplement and recover nitrogen gas for the switching disk device 1.

[0038] Specifically, the liquid nitrogen storage tank 2 has three lower pipe orifices and one upper pipe orifice.

[0039] For the convenience of description, the three lower pipe orifices of the liquid nitrogen storage tank 2 are respectively called the first lower pipe orifice 21, the second lower pipe orifice 22, and the third lower pipe orifice 23; the one upper pipe orifice of the liquid nitrogen storage tank 2 is called the first upper pipe orifice 24.

[0040] It should be noted that the first upper pipe orifice 24 of the liquid nitrogen storage tank 2 is located at the corresponding part of the upper gaseous region, and the first lower pipe orifice 21, the second lower pipe orifice 22, and the third lower pipe orifice 23 of the liquid nitrogen storage tank 2 are located at the corresponding parts of the lower liquid region.

[0041] The first lower pipe orifice 21 of the liquid nitrogen storage tank 2 serves as the main nitrogen gas supply pipe orifice and is connected to the gas supply end pipe orifice 111 of the switching disk device 1 through a pipeline. The gas-using end pipe orifice 112 of the switching disk device 1 is connected to the nitrogen gas input pipe orifice of the biobank 4. The switching disk device 1 receives the nitrogen gas output from the liquid nitrogen storage tank 2 through the gas supply end pipe orifice 111. The received nitrogen gas is first temporarily stored and buffered in the buffer tank 11, and then the nitrogen gas in the buffer tank 11 is transported to the biobank 4 through the gas-using end pipe orifice 112.

[0042] Those skilled in the art can understand that a vaporizer 26 is provided at the nitrogen output pipe orifice of the liquid nitrogen storage tank 2. That is to say, the first lower pipe orifice 21 of the liquid nitrogen storage tank 2 is communicated with the air supply end pipe orifice 111 of the switching disc device 1 through the vaporizer 26, and the vaporizer 26 is used to vaporize the liquid nitrogen in the liquid nitrogen storage tank 2 into nitrogen and then transport it to the switching disc device 1.

[0043] The gas-liquid separator 3 has two lower pipe orifices and one upper pipe orifice. For the convenience of description, the two lower pipe orifices of the gas-liquid separator 3 are respectively called the fourth lower pipe orifice 31 and the fifth lower pipe orifice 32; the one upper pipe orifice of the gas-liquid separator 3 is called the second upper pipe orifice 33.

[0044] It should be noted that the second upper pipe orifice 33 of the gas-liquid separator 3 is located at the corresponding part of the upper gaseous region, and the fourth lower pipe orifice 31 and the fifth lower pipe orifice 32 of the gas-liquid separator 3 are located at the corresponding parts of the lower liquid region.

[0045] The fourth lower pipe orifice 31 of the gas-liquid separator 3 is communicated with the third lower pipe orifice 23 of the liquid nitrogen storage tank 2 through a pipeline, and the second upper pipe orifice 33 of the gas-liquid separator 3 is communicated with the recovery end pipe orifice 113 of the switching disc device 1 through a pipeline.

[0046] The purpose of setting the gas-liquid separator 3 is as follows:

[0047] When the pressure of the nitrogen gas output by the vaporizer 26 is too low and lower than the requirement of the biological sample library 4, the nitrogen gas in the gas-liquid separator 3 will be input as a supplement to the buffer tank 11 of the switching disc device 1, that is, the nitrogen gas flows from the gas-liquid separator 3 to the buffer tank 11 of the switching disc device 1;

[0048] When the pressure of the nitrogen gas output by the vaporizer 26 is too high and exceeds the requirement of the biological sample library 4, the excess nitrogen gas will be input into the gas-liquid separator 3 for storage from the buffer tank 11 of the switching disc device 1, that is, the nitrogen gas flows from the buffer tank 11 of the switching disc device 1 to the gas-liquid separator 3.

[0049] In this way, a stable supply of nitrogen gas to the biological sample library can be ensured.

[0050] When the nitrogen gas in the gas-liquid separator 3 is insufficient, the liquid nitrogen in the liquid nitrogen storage tank 2 can be input into the gas-liquid separator 3 as a supplement.

[0051] In addition, the fifth lower pipe orifice 32 of the gas-liquid separator 3 is communicated with the nitrogen gas input pipe orifice of the biological sample library 4 through a pipeline. In this way, the liquid nitrogen storage tank 2 can directly supply gas to the biological sample library 4 through the gas-liquid separator 3.

[0052] It should be noted that the second lower pipe orifice 22 of the liquid nitrogen storage tank 2 is connected to the first upper pipe orifice 24 of the liquid nitrogen storage tank 2 through a pipeline, and a vaporization and pressurization facility 25 is provided on the connected pipeline. That is to say, the second lower pipe orifice 22 of the liquid nitrogen storage tank 2 is connected to the first upper pipe orifice 24 of the liquid nitrogen storage tank 2 through the vaporization and pressurization facility 25. In this way, a small amount of liquid nitrogen becomes nitrogen after being vaporized and pressurized by the vaporization and pressurization facility 25 and is stored in the liquid nitrogen storage tank 2 to ensure the stable pressure in the liquid nitrogen storage tank 2.

[0053] In this embodiment, the pressure of the nitrogen in the liquid nitrogen storage tank 2 is controlled at 0.3 MPa.

[0054] In this embodiment, the housing of the liquid nitrogen storage tank 2 is provided with a vacuum insulation layer to ensure the stable temperature of the liquid nitrogen storage tank 2.

[0055] In this embodiment, the recovery end pipe orifice 113 of the switching disk device 1 is about 1 Bar higher than the gas end, or the automatic control adjustment of the BMS is carried out.

[0056] It should be noted that in this embodiment, the size of the buffer tank 11 of the switching disk device 1 is 2 liters (diameter 25 cm, height about 40 cm, sus304), and the pressure is 0.1 MPa.

[0057] The switching disk device and the nitrogen supply system of this embodiment have the following advantages:

[0058] 1) A switching disk device 1 is provided between the nitrogen supply source and the nitrogen-using equipment. The switching disk device 1 can play a buffering role, so as to realize the stable supply of nitrogen to the nitrogen-using equipment;

[0059] 2) A nitrogen containment and release device is also provided for the switching disk device 1, so as to further ensure the stable supply of nitrogen to the nitrogen-using equipment;

[0060] 3) The gas-liquid separator 3 is used as the nitrogen containment and release device. Through the gas-liquid separator 3, part of the vaporized liquid nitrogen can be recovered and enter the liquid nitrogen storage tank 2, and at the same time, it is used as a backup gas supply from the gas end of the liquid nitrogen storage tank 2. While simplifying the gas supply facilities, it also ensures that nitrogen is fully utilized without waste.

[0061] The above is only the preferred embodiment of the present invention, and is not used to limit the protection scope of the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A switching disc device, characterized in that: The switching disk device is provided with a buffer tank (11), a gas supply end pipe orifice (111), a gas using end pipe orifice (112) and a recovery end pipe orifice (113), and the gas supply end pipe orifice (111), the gas using end pipe orifice (112) and the recovery end pipe orifice (113) are respectively communicated with the buffer tank (11); The gas supply end pipe orifice (111) is used for receiving nitrogen supplied by a nitrogen supply source, the gas using end pipe orifice (112) is used for delivering nitrogen to a nitrogen-using device, and the recovery end pipe orifice (113) is used for communicating with a nitrogen containment and release device.

2. The switching disk device according to claim 1, wherein: On the pipeline from the buffer tank (11) to the gas supply end pipe orifice (111), a second pressure regulating valve (16), a third stop valve (17) and a check valve (18) are sequentially arranged; on the pipeline from the buffer tank (11) to the recovery end pipe orifice (113), a first pressure regulating valve (13) and a first stop valve (14) are sequentially arranged; on the pipeline from the buffer tank (11) to the gas using end pipe orifice (112), a filter (19) is arranged.

3. The switching disk device according to claim 2, characterized in that: The buffer tank (11) is provided with a safety exhaust pipe orifice (114), and a safety valve (12) is arranged at the safety exhaust pipe orifice (114).

4. The switching disk device according to claim 3, characterized in that: On the pipeline from the buffer tank (11) to the recovery end pipe orifice (113), a bypass exhaust pipe orifice (115) is arranged, and a second stop valve (15) is arranged at the bypass exhaust pipe orifice (115).

5. A nitrogen supply system, characterized in that: A switching disk device (1), a liquid nitrogen storage tank (2) and a gas-liquid separator (3) are arranged in the nitrogen supply system; The switching disk device (1) is the switching disk device according to any one of claims 1 to 4; The liquid nitrogen storage tank (2) is provided with a first lower pipe orifice (21) and a third lower pipe orifice (23), the gas-liquid separator (3) is provided with a fourth lower pipe orifice (31) and a second upper pipe orifice (33), and a vaporizer (26) is arranged at the first lower pipe orifice (21) of the liquid nitrogen storage tank (2); The first lower pipe orifice (21) of the liquid nitrogen storage tank (2) is communicated with the gas supply end pipe orifice (111) of the switching disk device (1) through the vaporizer (26), the fourth lower pipe orifice (31) of the gas-liquid separator (3) is communicated with the third lower pipe orifice (23) of the liquid nitrogen storage tank (2), and the second upper pipe orifice (33) of the gas-liquid separator (3) is communicated with the recovery end pipe orifice (113) of the switching disk device (1).

6. The nitrogen supply system according to claim 5, characterized in that: The gas-liquid separator (3) further has a fifth lower pipe orifice (32), and the fifth lower pipe orifice (32) of the gas-liquid separator (3) is used for communicating with a nitrogen-using device.

7. The nitrogen supply system according to claim 5, wherein: The liquid nitrogen storage tank (2) further has a second lower pipe orifice (22) and a first upper pipe orifice (24), and the second lower pipe orifice (22) of the liquid nitrogen storage tank (2) is communicated with the first upper pipe orifice (24) of the liquid nitrogen storage tank (2) through a vaporization boosting facility (25).

8. The nitrogen supply system according to claim 5, wherein: The shell of the liquid nitrogen storage tank (2) is provided with a vacuum insulation layer.

9. The nitrogen supply system according to claim 5, wherein: The nitrogen-using device is a biological sample library (4).

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