A nitrogen supply device

Abstract

The present invention proposes a nitrogen gas supply device, comprising a liquid storage tank, a first gas supply pipeline structure, a second gas supply pipeline structure, a first solenoid valve, a first detector, a control cabinet and a first discharge pipeline structure; the first gas supply pipeline structure is connected to the liquid storage tank and comprises a power source, a second solenoid valve, and a first gasifier, the second gas supply pipeline structure is connected to the first gas supply pipeline structure and comprises a second gasifier connected to the power source, the first solenoid valve is connected between the liquid storage tank and the power source and is electrically connected to the control cabinet, the second solenoid valve is connected between the power source and the second gasifier and is electrically connected to the control cabinet, the first gasifier is connected to the power source, the second gasifier is used to be connected to a gas user, the power source is electrically connected to the control cabinet, the first detector is connected to the first gas supply pipeline structure and is electrically connected to the control cabinet, and is used to detect the air pressure in the first gas supply pipeline structure, and the first discharge pipeline structure is connected to the first gas supply pipeline.

Description

[Technical field]

[0001] The present invention relates to the technical field of gas supply, and in particular to a nitrogen gas supply device. [Background technology]

[0002] The existing nitrogen supply device has to be equipped with two variable frequency cryogenic liquid pumps (one backup and one in use), which increases the investment budget. Moreover, when the variable frequency cryogenic liquid pump in use fails, the backup variable frequency cryogenic liquid pump cannot be automatically put into operation. For the variable frequency cryogenic liquid pump, excessive nitrogen often causes cavitation failure of the pump (the pump is idling, but the pump is not working), and the fault cannot be automatically eliminated, and manual operation is required.

[0003] In view of this, it is necessary to provide a new type of nitrogen supply device to overcome the above-mentioned defects. [Summary of the invention]

[0004] The purpose of the present invention is to provide a nitrogen supply device, which reduces the use cost, can discharge nitrogen without manual operation, can automatically eliminate the fault of power source not doing work, and reduces the investment cost.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a nitrogen gas supply device 100, including a liquid storage tank 1, a first gas supply pipeline structure 2, a second gas supply pipeline structure 3, a first solenoid valve 4, a first detector 5, a control cabinet 6 and a first discharge pipeline structure 7; the first gas supply pipeline structure 2 is connected to the liquid storage tank 1 and includes a power source 21, a second solenoid valve 22, and a first gasifier 23, the second gas supply pipeline structure 3 is connected to the first gas supply pipeline structure 2 and includes a second gasifier 31 connected to the power source 21, the first solenoid valve 4 is connected between the liquid storage tank 1 and the power source 21 and is electrically connected to the control cabinet 6, and the second solenoid valve 22 is connected between the power source 21 and the second gasifier 31 and is electrically connected to the control cabinet 6, the first gasifier 23 is connected to the power source 21 and is used to be connected to the gas-using device 200, the second gasifier 31 is used to be connected to the gas-using device 200, the air pressure of the first gas supply pipeline structure 2 is higher than the air pressure of the second gas supply pipeline structure 3, the power source 21 is electrically connected to the control cabinet 6, the first detector 5 is connected to the first gas supply pipeline structure 2 and is electrically connected to the control cabinet 6, and is used to detect the air pressure in the first gas supply pipeline structure 2, and the first exhaust pipeline structure 7 is connected to the first gas supply pipeline 2.

[0006] In a preferred embodiment, the nitrogen supply device 100 further includes a first delivery pipeline 300 , and the second solenoid valve 22 , the power source 21 , and the first gasifier 23 are connected in series to the first delivery pipeline 300 .

[0007] In a preferred embodiment, the nitrogen supply device 100 further includes a second delivery pipeline 400 , the second gasifier 31 is serially connected to the second delivery pipeline 400 , and one end of the first delivery pipeline 300 is connected to the second delivery pipeline 400 .

[0008] In a preferred embodiment, the nitrogen supply device 100 further includes a first pressure reducer 8 , and the first pressure reducer 8 is connected in series to the first delivery pipeline 300 .

[0009] In a preferred embodiment, the nitrogen supply device 100 further includes a second pressure reducer 9 , and the second pressure reducer 9 is serially connected to the second delivery pipeline 400 .

[0010] In a preferred embodiment, the nitrogen supply device 100 further includes two flow meters 10, one of which is connected in series to the first delivery pipeline 300 and electrically connected to the control cabinet 6, and the other flow meter 10 is connected in series to the second delivery pipeline 400 and electrically connected to the control cabinet 6.

[0011] In a preferred embodiment, the nitrogen supply device 100 further includes a pipeline 500 , and the first solenoid valve 4 is connected between the liquid storage tank 1 and the power source 21 through the pipeline 500 .

[0012] In a preferred embodiment, the nitrogen supply device 100 also includes two second detectors 11, one of which is connected in series to the first delivery pipeline 300, and the other is connected to the pipeline 500 and is located between the liquid storage tank 1 and the power source 21, and the two second detectors 11 are electrically connected to the control cabinet 6.

[0013] In a preferred embodiment, the first discharge pipeline structure 7 includes a first discharge pipeline 71 and a third solenoid valve 72 connected to the first discharge pipeline 71, the third solenoid valve 72 is electrically connected to the control cabinet 6, and the first discharge pipeline 71 is connected to the first air supply pipeline structure 2 through the third solenoid valve 72.

[0014] In a preferred embodiment, the nitrogen supply device 100 further includes a second discharge pipeline structure 600, wherein the second discharge pipeline structure 600 includes a second discharge pipeline 601 and a plurality of valves 602 connected to the second discharge pipeline 601, and the second discharge pipeline 601 is connected to the second gas supply pipeline structure 3 through the plurality of valves 602.

[0015] Compared with the prior art, the nitrogen supply device provided by the present invention has the beneficial effect that only one power source is provided, thereby reducing the investment cost, and a first discharge pipeline structure is further provided to be connected with the first supply pipeline structure, and nitrogen can be discharged through the first discharge pipeline structure, and the fault of the power source not doing work can be automatically resolved without manual operation.

Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic structural diagram of the nitrogen supply device provided by the present invention. [Specific implementation method]

[0018] In order to make the purpose, technical solution and beneficial technical effect of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining the present invention, not for limiting the present invention.

[0019] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be determined according to the specific circumstances.

[0021] In addition, the terms "first", "second", and "a" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "b" may explicitly or implicitly include one or more of the features. In addition, the meanings of "multiple" and "several" refer to two or more, unless otherwise clearly and specifically defined.

[0022] See also Figure 1 The present invention provides a nitrogen gas supply device 100, comprising a liquid storage tank 1, a first gas supply pipeline structure 2, a second gas supply pipeline structure 3, a first solenoid valve 4, a first detector 5, a control cabinet 6 and a first discharge pipeline structure 7; the first gas supply pipeline structure 2 is connected to the liquid storage tank 1 and comprises a power source 21, a second solenoid valve 22, and a first gasifier 23, the second gas supply pipeline structure 3 is connected to the first gas supply pipeline structure 2 and comprises a second gasifier 31 connected to the power source 21, the first solenoid valve 4 is connected between the liquid storage tank 1 and the power source 21 and is electrically connected to the control cabinet 6, the second solenoid valve 22 is connected to the power source 21 and the second gasifier 31 is connected to the power source 21. 31 and is electrically connected to the control cabinet 6, the first vaporizer 23 is connected to the power source 21 and is used to be connected to the gas-using device 200, the second vaporizer 31 is used to be connected to the gas-using device 200, the liquid storage tank 1 contains liquid nitrogen, the air pressure of the first gas supply pipeline structure 2 is higher than the air pressure of the second gas supply pipeline structure 3, the power source 21 is used to provide power and is electrically connected to the control cabinet 6, the first detector 5 is connected to the first gas supply pipeline structure 2 and is electrically connected to the control cabinet 6, and is used to detect the air pressure in the first gas supply pipeline structure 2, and the first discharge pipeline structure 7 is connected to the first gas supply pipeline 2 and is used to discharge nitrogen.

[0023] In this embodiment, the power source 21 is a cryogenic liquid pump; the first vaporizer 23 and the second vaporizer 31 are both used to heat liquid nitrogen, and the number of the second vaporizers 31 is two; the first detector 5 is a pressure sensor; the control cabinet 6 is a frequency conversion control cabinet and is used to receive the signal of the first detector 5, and can send control signals to the first solenoid valve 4 and the second solenoid valve 22.

[0024] When part of the liquid nitrogen in the liquid storage tank 1 flows to the power source 21 through the second solenoid valve 22, the power source 21 starts to transport the liquid nitrogen to the first vaporizer 23, the first vaporizer 23 heats the liquid nitrogen and provides the liquid nitrogen to the gas user, and the first detector 5 detects the gas pressure in the first gas supply pipeline structure 2;

[0025] When the first gas supply pipeline structure 2 starts to supply gas and the first gas supply pipeline structure 2 stops supplying gas for a long time and then supplies gas again, the control cabinet sends a signal to the second solenoid valve 22 and the first solenoid valve 4 to open the second solenoid valve 22 and the first solenoid valve 4, and after the liquid nitrogen passes through the power source 21 to pre-cool the power source 21 for a few seconds, the first solenoid valve 4 is closed, and then the gas supply starts;

[0026] If the first detector 5 detects that the air pressure at the first detector 5 is equal to the preset air pressure value of the control cabinet 6 (normal air supply), the first solenoid valve 4 is in a closed state, and the first air supply pipeline structure 2 normally provides liquid nitrogen to the air-using device 200;

[0027] If the first detector 5 detects that the air pressure at the first detector 5 is lower than the preset air pressure value of the control cabinet 6, the first solenoid valve 4 is precooled at this time, and the control cabinet 6 sends a signal to the first solenoid valve 4 to open the first solenoid valve 4, and the control cabinet 6 sends a signal to increase the speed of the power source 21 to increase the pressure so as to provide liquid nitrogen for the gas-using device 200;

[0028] If the first detector 5 detects that the air pressure at the first detector 5 is higher than the preset air pressure value of the control cabinet 6, the control cabinet 6 sends a signal to reduce the speed of the power source 21 or stop the power source 21 to increase the pressure so as to provide liquid nitrogen for the gas-using device 200; if the first detector 5 detects that the air pressure at the first detector 5 is higher than the preset air pressure value of the control cabinet 6, and the speed of the power source 21 is lower than the minimum speed of the power source 21, it means that the user uses very little nitrogen or does not need gas temporarily, and the power source 21 will automatically stop running;

[0029] At the same time, part of the liquid nitrogen in the liquid storage tank 1 flows into the second gasifier 31, and the second gasifier 31 heats the liquid nitrogen and provides the liquid nitrogen to the gas user 400. By using a cryogenic liquid pump, the investment cost is reduced.

[0030] In one embodiment, the nitrogen supply device 100 further includes a first delivery pipeline 300, and the second solenoid valve 22, the power source 21, and the first gasifier 23 are sequentially connected in series to the first delivery pipeline 300.

[0031] In one embodiment, the nitrogen supply device 100 further includes a second delivery pipeline 400 , the second gasifier 31 is serially connected to the second delivery pipeline 400 , and one end of the first delivery pipeline 300 is connected to the second delivery pipeline 400 .

[0032] In one embodiment, the nitrogen supply device 100 further includes a pipeline 500 , and the first solenoid valve 4 is connected between the liquid storage tank 1 and the power source 21 through the pipeline 500 .

[0033] In one embodiment, the first discharge pipeline structure 7 includes a first discharge pipeline 71 and a third solenoid valve 72 connected to the first discharge pipeline 71, the third solenoid valve 72 is electrically connected to the control cabinet 6, and the first discharge pipeline 71 is connected to the first gas supply pipeline structure 2 through the third solenoid valve 72. If the power source 21 is running, when the first detector 5 detects that the air pressure value in the first gas supply pipeline structure 2 has not changed (indicating that a cavitation fault has occurred, the pump is idling, but the pump is not working), the third solenoid valve 72 is opened for a few seconds and then closed, and the first discharge pipeline 71 discharges nitrogen to make the power source 21 work, and the cavitation fault is automatically relieved at this time, and the power source 21 operates normally to work; if the power source 21 is running, when the first detector 5 detects that the air pressure value in the first gas supply pipeline structure 2 has changed, the third solenoid valve 72 is closed.

[0034] In one embodiment, the nitrogen supply device 100 further includes a second discharge pipeline structure 600, wherein the second discharge pipeline structure 600 includes a second discharge pipeline 601 and a plurality of valves 602 connected to the second discharge pipeline 601, and the second discharge pipeline 601 is connected to the second pipeline structure 3 through the plurality of valves 602. By opening the valve 602, the second discharge pipeline 601 can discharge nitrogen.

[0035] In one embodiment, the nitrogen supply device 100 further includes a first pressure reducer 8 , which is connected in series to the first delivery pipeline 300 and is used to reduce the gas pressure in the first delivery pipeline 300 .

[0036] In one embodiment, the nitrogen supply device 100 further includes a second pressure reducer 9 , which is connected in series to the second delivery pipeline 400 and is used to reduce the gas pressure in the second delivery pipeline 400 .

[0037] In one embodiment, the nitrogen supply device 100 further includes two flow meters 10 , one of which is connected in series to the first delivery pipeline 300 and electrically connected to the control cabinet 6 , and the other flow meter 10 is connected in series to the second delivery pipeline 400 and electrically connected to the control cabinet 6 .

[0038] In one embodiment, the nitrogen supply device 100 further includes two second detectors 11, one of which is connected in series to the first delivery pipeline 300, and the other is connected to the pipeline 500 and is located between the liquid storage tank 1 and the power source 21, and the two second detectors 11 are both electrically connected to the control cabinet 6. In this embodiment, the two second detectors 11 are both temperature sensors.

[0039] The present invention is not limited to what is described in the specification and implementation modes, and therefore additional advantages and modifications can be easily realized by those skilled in the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. A nitrogen supply device (100), characterized in that: The invention comprises a liquid storage tank (1), a first air supply pipeline structure (2), a second air supply pipeline structure (3), a first solenoid valve (4), a first detector (5), a control cabinet (6), and a first discharge pipeline structure (7); the first air supply pipeline structure (2) is connected to the liquid storage tank (1) and comprises a power source (21), a second solenoid valve (22), and a first vaporizer (23); the second air supply pipeline structure (3) is connected to the first air supply pipeline structure (2) and comprises a second vaporizer (31) connected to the power source (21); the first solenoid valve (4) is connected between the liquid storage tank (1) and the power source (21) and is electrically connected to the control cabinet (6); the second solenoid valve (22) is connected to the power source ( 21) and the second gasifier (31) and is electrically connected to the control cabinet (6); the first gasifier (23) is connected to the power source (21) and is used to be connected to the gas-using device (200); the second gasifier (31) is used to be connected to the gas-using device (200); the air pressure of the first air supply pipeline structure (2) is higher than the air pressure of the second air supply pipeline structure (3); the power source (21) is electrically connected to the control cabinet (6); the first detector (5) is connected to the first air supply pipeline structure (2) and is electrically connected to the control cabinet (6) and is used to detect the air pressure in the first air supply pipeline structure (2); and the first exhaust pipeline structure (7) is connected to the first air supply pipeline structure (2); The nitrogen supply device (100) further comprises a first delivery pipeline (300), and the second solenoid valve (22), the power source (21), and the first gasifier (23) are connected in series to the first delivery pipeline (300); The nitrogen supply device (100) further comprises a second discharge pipeline structure (600), wherein the second discharge pipeline structure (600) comprises a second discharge pipeline (601) and a plurality of valves (602) connected to the second discharge pipeline (601), and the second discharge pipeline (601) is connected to the second gas supply pipeline structure (3) via the plurality of valves (602).

2. The nitrogen supply device (100) according to claim 1, characterized in that: The nitrogen supply device (100) further comprises a second delivery pipeline (400), the second gasifier (31) is connected in series to the second delivery pipeline (400), and one end of the first delivery pipeline (300) is connected to the second delivery pipeline (400).

3. The nitrogen supply device (100) according to claim 1, characterized in that: The nitrogen supply device (100) further comprises a first pressure reducer (8), wherein the first pressure reducer (8) is connected in series to the first delivery pipeline (300).

4. The nitrogen supply device (100) according to claim 2, characterized in that: The nitrogen supply device (100) further comprises a second pressure reducer (9), wherein the second pressure reducer (9) is connected in series to the second delivery pipeline (400).

5. The nitrogen supply device (100) according to claim 2, characterized in that: The nitrogen supply device (100) further comprises two flow meters (10), wherein one flow meter (10) is connected in series to the first delivery pipeline (300) and is electrically connected to the control cabinet (6), and the other flow meter (10) is connected in series to the second delivery pipeline (400) and is electrically connected to the control cabinet (6).

6. The nitrogen supply device (100) according to claim 5, characterized in that: The nitrogen supply device (100) further comprises a pipeline (500), and the first solenoid valve (4) is connected between the liquid storage tank (1) and the power source (21) via the pipeline (500).

7. The nitrogen supply device (100) according to claim 6, characterized in that: The nitrogen supply device (100) further comprises two second detectors (11), wherein one second detector (11) is connected in series to the first delivery pipeline (300), and the other second detector (11) is connected to the pipeline (500) and is located between the liquid storage tank (1) and the power source (21), and the two second detectors (11) are both electrically connected to the control cabinet (6).

8. The nitrogen supply device (100) according to claim 1, characterized in that: The first discharge pipeline structure (7) comprises a first discharge pipeline (71) and a third solenoid valve (72) connected to the first discharge pipeline (71); the third solenoid valve (72) is electrically connected to the control cabinet (6); and the first discharge pipeline (71) is connected to the first air supply pipeline structure (2) via the third solenoid valve (72).

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