Gas supply device capable of automatically adjusting oxygen content

Abstract

The utility model relates to the field of gas mixing devices, in particular to an oxygen content automatic adjusting gas supply device which comprises an air compression gas inlet pipe, a nitrogen gas inlet pipe, a mixing tank, a controller, an oxygen content detection unit and a mixing tank, one end of the air compression gas inlet pipe is connected with an air source, and one end of the nitrogen gas inlet pipe is connected with a nitrogen gas source. The other end of the air pressure inlet pipe and the other end of the nitrogen inlet pipe are both connected with the mixing tank, an automatic adjusting valve is arranged on the air pressure inlet pipe, the oxygen content detection unit and the automatic adjusting valve are both connected with the controller, and the oxygen content detection unit is used for detecting the oxygen content of gas in the mixing tank and outputting a detection signal. And the controller is used for receiving the detection signal and controlling the automatic regulating valve to regulate the opening degree when the oxygen content is not in the set interval, so that the oxygen content of the mixed gas reaches the set interval. The oxygen content in the mixed gas can be automatically adjusted, and the usage amount of the gas cylinder is reduced.

Description

Technical Field

[0001] This application relates to the field of gas mixing devices, and in particular, to an automatic oxygen content regulating gas supply device. Background Art

[0002] In the process of fine chemical production, in order to ensure the stability of the process reaction system and product quality, it is necessary to precisely control the oxygen content in the reaction environment.

[0003] Currently, in fine chemical production, the common oxygen content control method is mainly to customize and purchase gas cylinders containing oxygen and nitrogen with set mixing ratios, and use the gas cylinders to supply mixed gas to the reaction kettle, so as to ensure that the oxygen content of the output gas is stable within a certain range.

[0004] The main problems of the above traditional method are: long-term customization and purchase of gas cylinders require a lot of costs, and the customized gas cylinders cannot adjust the mixing ratio of oxygen and nitrogen, with a small application range. If a project cannot use up all the gas cylinders, the remaining gas cylinders will be wasted. Utility Model Content

[0005] In order to automatically adjust the oxygen content in the mixed gas to adapt to different oxygen content requirements, this application provides an automatic oxygen content regulating gas supply device.

[0006] An automatic oxygen content regulating gas supply device provided by this application adopts the following technical solution:

[0007] An automatic oxygen content regulating gas supply device includes an air compressor inlet pipe, a nitrogen inlet pipe, a mixing tank, a controller, an oxygen content detection unit and a mixing tank. One end of the air compressor inlet pipe is connected to an air source, one end of the nitrogen inlet pipe is connected to a nitrogen source, the other ends of the air compressor inlet pipe and the nitrogen inlet pipe are both connected to the mixing tank. An automatic regulating valve is arranged on the air compressor inlet pipe. Both the oxygen content detection unit and the automatic regulating valve are connected to the controller. The oxygen content detection unit is used to detect the oxygen content of the gas in the mixing tank and output a detection signal. The controller is used to receive the detection signal and control the automatic regulating valve to adjust the opening degree when the oxygen content is not within the set range so that the oxygen content of the mixed gas reaches the set range.

[0008] By adopting the above technical solution, when the reactor needs to be supplied with gas, the staff only needs to turn on the air source and the nitrogen source. Air and nitrogen enter the mixing tank through the air compressor inlet pipe and the nitrogen inlet pipe respectively. The mixing tank then transports the mixed gas to the reactor. During this period, the oxygen content detection unit detects the oxygen content of the mixed gas in the mixing tank. If the oxygen content is not equal to the set range, the automatic regulating valve is controlled to adjust the opening degree so that the oxygen content of the mixed gas reaches the required oxygen content range, thereby being able to automatically adjust the oxygen content in the mixed gas and then adapting to different oxygen content requirements; and reducing the usage amount of gas cylinders, thus saving the long-term usage cost.

[0009] Preferably, pressure reducing valves are installed at the inlets of both the air compressor inlet pipe and the nitrogen inlet pipe, and the pressure reducing valves are used to make the pressures in the air compressor inlet pipe and the nitrogen inlet pipe the same.

[0010] By adopting the above technical solution, before the air and nitrogen are mixed, they are decompressed to the same pressure through the pressure reducing valve to achieve the effect of uniform mixing.

[0011] Preferably, it further includes a mixing pipe and a filter. One end of the mixing pipe is communicated with the air compressor inlet pipe and the nitrogen inlet pipe, and the other end of the mixing pipe is communicated with the filter. The filter is used to filter impurities in the mixed gas, and the filter is communicated with the middle part of the mixing tank through a transfer pipe.

[0012] By adopting the above technical solution, the filter can effectively remove impurities in the mixed gas, and the filtered mixed gas enters from the middle part of the mixing tank. Since the impurities are heavier than the gas, the impurities precipitate at the bottom of the mixing tank, thereby further ensuring the purity of the mixed gas and then reducing the possibility of subsequent equipment being contaminated.

[0013] Preferably, flow meters are installed on both the air compressor inlet pipe, the nitrogen inlet pipe and the transfer pipe.

[0014] By adopting the above technical solution, the staff can monitor the gas flow rates in the air compressor inlet pipe, the nitrogen inlet pipe and the transfer pipe in real time, so as to facilitate the staff to adjust each valve according to different usage amounts of the mixed gas.

[0015] Preferably, check valves are installed between the air compressor inlet pipe and the mixing pipe or between the nitrogen inlet pipe and the mixing pipe.

[0016] By adopting the above technical solution, the check valve can effectively prevent the mixed gas from flowing back, avoid the gas from flowing back in the system, and protect the safety of the equipment; by preventing the gas from flowing back, the check valve helps to maintain the pressure stability in the pipeline and ensure the normal operation of the system.

[0017] Preferably, the mixing tank is connected to an output air supply pipe for communicating with the reactor, an air pressure transmitter is installed on the air pressure inlet pipe, a nitrogen pressure transmitter is installed on the nitrogen inlet pipe, and a mixed pressure transmitter is installed on the output air supply pipe.

[0018] By adopting the above technical solution, the air pressure transmitter, nitrogen pressure transmitter and mixed pressure transmitter are used to detect the gas pressure in the air pressure inlet pipe, nitrogen inlet pipe and output gas supply pipe in real time, so that users can timely understand the gas pressure in each pipeline and ensure that the gas supply system operates within a safe and efficient pressure range.

[0019] Preferably, it also includes an alarm unit, and the alarm unit and the air pressure cut-off valve are connected to a controller. The controller is used to receive a detection signal and output an alarm signal when the oxygen content exceeds a limit value to control the alarm unit to alarm.

[0020] By adopting the above technical solution, when the oxygen content in the mixing tank exceeds the limit value, the controller controls the alarm unit to alarm, which may be to emit alarm sound and light, and promptly closes the compressed air intake pipe to stop the input of air. At this time, the oxygen content is reduced by continuing to intake air through the nitrogen intake pipe.

[0021] Preferably, an air pressure cut-off valve is installed on the compressed air intake pipe, and a nitrogen cut-off valve is installed on the nitrogen intake pipe. The air pressure transmitter, the nitrogen pressure transmitter, the mixed pressure transmitter, the air pressure cut-off valve and the nitrogen cut-off valve are all connected to the controller. The air pressure transmitter, the nitrogen pressure transmitter and the mixed pressure transmitter are respectively used to detect the air pressure in the compressed air intake pipe, the nitrogen intake pipe and the output air supply pipe and output a first monitoring signal, a second monitoring signal and a third monitoring signal. The controller is used to receive the detection signal, the first monitoring signal, the second monitoring signal and the third monitoring signal.

[0022] When the oxygen content exceeds the limit value, the air pressure cut-off valve is controlled to close;

[0023] When the pressure in the compressed air intake pipe exceeds a first threshold, the compressed air shut-off valve is controlled to close;

[0024] When the pressure in the nitrogen intake pipe exceeds a second threshold, the air pressure cut-off valve and the nitrogen cut-off valve are controlled to close;

[0025] When the pressure in the output air supply pipe exceeds the third threshold, the air pressure cut-off valve is controlled to close first, and when the oxygen content alarm signal is released, the nitrogen cut-off valve is controlled to close.

[0026] By adopting the above technical solution, when the oxygen content in the mixing tank exceeds the limit value, the controller closes the compressed air intake pipe to stop the input of air. At this time, the oxygen content is reduced by continuing to intake air through the nitrogen intake pipe. When the pressure in the compressed air intake pipe exceeds the first threshold, the compressed air shut-off valve is closed in time; in addition, when the pressure in the nitrogen intake pipe exceeds the second threshold, the compressed air shut-off valve and the nitrogen shut-off valve are closed in time; when the pressure in the output air supply pipe exceeds the third threshold, the compressed air shut-off valve is closed first, and the nitrogen shut-off valve is closed after the oxygen content alarm signal is released.

[0027] Preferably, it also includes a control panel and a display module, both of which are connected to the controller. The control panel is used to adjust the set interval according to the user's operation, and the controller is used to receive the detection signal and control the display to display the oxygen content.

[0028] By adopting the above technical solution, the staff can adjust the set range through the control panel to meet the process requirements of different oxygen content ranges; they can also monitor the oxygen content in the mixing tank in real time, so that they can adjust the oxygen content of the mixing tank through various valves in time, thereby improving the safety of the system.

[0029] Preferably, it also includes a mobile vehicle, and the compressed air intake pipe, nitrogen intake pipe, mixing tank, controller, oxygen content detection unit and mixing tank are all installed on the mobile vehicle.

[0030] By adopting the above technical solution, the device is movable and can be used for automatic oxygen control under normal pressure conditions of different reactors.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. When the reactor needs to be supplied with gas, the staff only needs to turn on the air source and the nitrogen source. The air and nitrogen enter the mixing tank through the compressed air inlet pipe and the nitrogen inlet pipe respectively. During this period, the oxygen content detection unit detects the oxygen content of the mixed gas in the mixing tank. If the oxygen content is not equal to the set range, the automatic regulating valve is controlled to adjust the opening so that the oxygen content of the mixed gas reaches the required oxygen content range, so that the oxygen content in the mixed gas can be automatically adjusted to meet different oxygen content requirements; and the use of gas cylinders is reduced, thereby saving the cost of long-term use;

[0033] 2. When the pressure in the air intake pipe exceeds the threshold, close the air pressure cut-off valve in time; when the pressure in the nitrogen intake pipe exceeds the threshold, close the air pressure cut-off valve and the nitrogen cut-off valve in time; when the pressure in the output air supply pipe exceeds the threshold, close the air pressure cut-off valve first, and wait until the oxygen content alarm signal is released before closing the nitrogen cut-off valve;

[0034] 3. When the oxygen content in the mixing tank exceeds the limit value, the controller controls the alarm unit to give an alarm, which can be to emit alarm sound and light, and promptly close the air compressor inlet pipe to stop the input of air. At this time, the oxygen content is reduced by continuously introducing nitrogen through the nitrogen inlet pipe. Description of the Drawings

[0035] Figure 1 It is a structural schematic diagram of the oxygen content automatic adjustment air supply device according to the embodiment of the present application.

[0036] Figure 2 It is an overall structural schematic diagram of the oxygen content automatic adjustment air supply device according to the embodiment of the present application.

[0037] Figure 3 It is a partial structural block diagram of the oxygen content automatic adjustment air supply device according to the embodiment of the present application, mainly showing the display module and the control panel.

[0038] Description of the reference numerals: 1, mobile vehicle; 2, air compressor inlet pipe; 21, automatic regulating valve; 22, air compressor transmitter; 23, air compressor cut-off valve; 3, nitrogen inlet pipe; 31, nitrogen pressure transmitter; 32, nitrogen cut-off valve; 4, mixing tank; 5, controller; 6, oxygen content detection unit; 71, output air supply pipe; 72, mixing pressure transmitter; 8, pressure reducing valve; 9, mixing pipe; 10, filter; 11, flowmeter; 12, check valve; 13, alarm unit; 14, control panel; 15, display module; 16, transfer pipe. Detailed Description of the Embodiment

[0039] The following further describes the present application in detail with reference to all the drawings.

[0040] The embodiment of the present application discloses an oxygen content automatic adjustment air supply device. Refer to Figure 1 、 Figure 2 An oxygen content automatic adjustment air supply device includes a mobile vehicle 1. On the mobile vehicle 1, a mixing pipe 9, an air compressor inlet pipe 2, a nitrogen inlet pipe 3, and a mixing tank 4 are installed. The mobile vehicle 1 is connected with a handle for staff to hold, and the bottom of the mobile vehicle 1 is connected with a plurality of universal wheels.

[0041] One end of the air compressor inlet pipe 2 is connected to an air source, and one end of the nitrogen inlet pipe 3 is connected to a nitrogen source. A manual valve is installed between the nitrogen inlet pipe 3 and the nitrogen source, and the nitrogen supply flow rate is manually controlled by the manual valve. Pressure reducing valves 8 are installed between the air compressor inlet pipe 2 and the air source and between the nitrogen inlet pipe 3 and the nitrogen source. The pressure reducing valve 8 makes the pressure in the air compressor inlet pipe 2 and the pressure in the nitrogen inlet pipe 3 the same. For the air compressor inlet pipe 2 and the nitrogen inlet pipe 3, one end of the mixing pipe 9 is connected to the air compressor inlet pipe 2 and the nitrogen inlet pipe 3, and the other end of the mixing pipe 9 is connected to the filter 10. The filter 10 is connected to the middle of the mixing tank 4 through the transfer pipe 16. The filter 10 is a filter tank with multiple filter meshes installed inside. A rotameter 11 is installed on the transfer pipe 16. And check valves 12 are installed between the air compressor inlet pipe 2 and the mixing pipe 9 or between the nitrogen inlet pipe 3 and the mixing pipe 9. Rotameters 11 are installed on the air compressor inlet pipe 2 and the nitrogen inlet pipe 3 before the check valve 12. An automatic regulating valve 21 is installed on the air compressor inlet pipe 2 before the rotameter 11. The automatic regulating valve 21 uses an electric regulating valve. An air compressor cut-off valve 23 is installed on the air compressor inlet pipe 2 before the automatic regulating valve 21. Nitrogen cut-off valves 32 are installed on the nitrogen inlet pipe 3 before the flow meter 11. An air compressor pressure transmitter 22 is installed on the air compressor inlet pipe 2 before the air compressor cut-off valve 23. A nitrogen pressure transmitter 31 is installed on the nitrogen inlet pipe 3 before the nitrogen cut-off valve 32. The mixing tank 4 is connected to an output supply pipe 71 that communicates with the reaction kettle. The output supply pipe 71 ventilates to the bottom of the reaction kettle, adopting an upper-inserted bottom pipe ventilation method. The bottom of the bottom pipe is a multi-hole structure with a pore diameter of 20 microns and is composed of five layers of sintered mesh. The main pipeline diameter is designed as DN25, and the material is 316L. A mixing pressure transmitter 72 is installed on the output supply pipe 71. In another embodiment, the mixing pressure transmitter 72 can also be installed inside the mixing tank 4. An exhaust pipe is installed at the bottom of the mixing tank 4, and an exhaust valve is installed on the exhaust pipe.

[0042] Refer to Figure 2 、 Figure 3The mobile vehicle 1 is provided with an installation cabinet and an electrical cabinet, an alarm unit 13 is provided on the electrical cabinet, the alarm unit 13 adopts an audible and visual alarm, the oxygen content detection unit 6 adopts an oxygen content analyzer, the oxygen content detection unit 6 is provided in the installation cabinet, a controller 5, a control panel 14 and a display module 15 are provided in the electrical cabinet, the controller 5 adopts a PLC control module, the control panel 14 can be a panel with buttons or a touch screen, the display module 15 adopts a display screen, the oxygen content detection unit 6 and the automatic regulating valve 21 are both connected to the controller 5, the oxygen content detection unit 6 is used to detect the oxygen content of the gas in the mixing tank 4 and output a detection signal, the controller 5 is used to receive the detection signal, and when the oxygen content is not within the set interval, the automatic regulating valve 21 is controlled to adjust the opening so that the oxygen content of the mixed gas reaches the set interval, and the set interval can be stored in the controller 5 in advance by the designer; the controller 5 outputs an alarm signal when the oxygen content exceeds the limit value, and the alarm unit 13 receives the alarm signal and emits an alarm sound and light; the controller 5 can also control the display screen to display the set interval and the real-time oxygen content in the mixing tank 4.

[0043] In addition, the air pressure transmitter 22, the nitrogen pressure transmitter 31, the mixed pressure transmitter 72, the air pressure cut-off valve 23 and the nitrogen cut-off valve 32 are all connected to the controller 5. The air pressure transmitter 22, the nitrogen pressure transmitter 31 and the mixed pressure transmitter 72 are respectively used to detect the air pressure in the air pressure intake pipe 2, the nitrogen intake pipe 3 and the output air supply pipe 71 and output the first monitoring signal, the second monitoring signal and the third monitoring signal. The controller 5 is used to receive the detection signal, the first monitoring signal, the second monitoring signal and the third monitoring signal. Signal, and when the oxygen content exceeds the limit value, the air pressure cut-off valve 23 is controlled to be closed; when the pressure in the air pressure intake pipe 2 exceeds the first threshold, the air pressure cut-off valve 23 is controlled to be closed; when the pressure in the nitrogen intake pipe 3 exceeds the second threshold, the air pressure cut-off valve 23 and the nitrogen cut-off valve 32 are controlled to be closed; when the pressure in the output air supply pipe 71 exceeds the third threshold, the air pressure cut-off valve 23 is controlled to be closed first, at this time, the air input stops, the nitrogen input continues, the oxygen content decreases, and when the oxygen content alarm signal is released, the nitrogen cut-off valve 32 is controlled to be closed. The first threshold, the second threshold and the third threshold are all input by the designer, and the output of the mixed gas is affected at this value.

[0044] The implementation principle of an oxygen content automatically regulated gas supply device in an embodiment of the present application is as follows: When it is necessary to supply gas to the reaction kettle, the staff only needs to turn on the air source and the nitrogen source. Air and nitrogen enter the mixing tank 4 through the air pressure inlet pipe 2 and the nitrogen inlet pipe 3 respectively. The mixing tank 4 then transports the mixed gas to the reaction kettle. During this period, the oxygen content detection unit 6 detects the oxygen content of the mixed gas in the mixing tank 4. If the oxygen content is not equal to the set range, the automatic regulating valve 21 is controlled to adjust the opening degree so that the oxygen content of the mixed gas reaches the required oxygen content range, thereby being able to automatically regulate the oxygen content in the mixed gas and further adapting to different oxygen content requirements; and reducing the usage amount of gas cylinders, thus saving the long-term usage cost.

[0045] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An oxygen content automatic regulating gas supply device, characterized in that: The invention comprises an air-compressed air intake pipe (2), a nitrogen-compressed air intake pipe (3), a mixing tank (4), a controller (5), an oxygen content detection unit (6) and a mixing tank (4), wherein one end of the air-compressed air intake pipe (2) is connected to an air source, one end of the nitrogen-compressed air intake pipe (3) is connected to a nitrogen source, the other ends of the air-compressed air intake pipe (2) and the nitrogen-compressed air intake pipe (3) are both connected to the mixing tank (4), an automatic regulating valve (21) is provided on the air-compressed air intake pipe (2), the oxygen content detection unit (6) and the automatic regulating valve (21) are both connected to the controller (5), the oxygen content detection unit (6) is used to detect the oxygen content of the gas in the mixing tank (4) and output a detection signal, and the controller (5) is used to receive the detection signal and, when the oxygen content is not within a set range, control the automatic regulating valve (21) to adjust the opening so that the oxygen content of the mixed gas reaches the set range.

2. The oxygen content automatic regulating gas supply device according to claim 1, characterized in that: A pressure reducing valve (8) is installed at the inlet of the compressed air intake pipe (2) and the inlet of the nitrogen intake pipe (3). The pressure reducing valve (8) is used to make the pressure in the compressed air intake pipe (2) and the pressure in the nitrogen intake pipe (3) the same.

3. The oxygen content automatic regulating gas supply device according to claim 1, characterized in that: The invention also comprises a mixing tube (9) and a filter (10), wherein one end of the mixing tube (9) is connected to the compressed air intake pipe (2) and the nitrogen intake pipe (3), and the other end of the mixing tube (9) is connected to the filter (10), and the filter (10) is used to filter impurities in the mixed gas. The filter (10) is connected to the middle of the mixing tank (4) through the transfer pipe (16).

4. The oxygen content automatic regulating gas supply device according to claim 3, characterized in that: Flow meters (11) are installed on the compressed air intake pipe (2), the nitrogen intake pipe (3) and the transfer pipe (16).

5. The oxygen content automatic regulating gas supply device according to claim 3, characterized in that: A check valve (12) is installed between the compressed air intake pipe (2) and the mixing pipe (9) or between the nitrogen intake pipe (3) and the mixing pipe (9).

6. The oxygen content automatic regulating gas supply device according to claim 5, characterized in that: The mixing tank (4) is connected to an output air supply pipe (71) for communicating with a reaction kettle, an air pressure transmitter (22) is installed on the compressed air intake pipe (2), a nitrogen pressure transmitter (31) is installed on the nitrogen intake pipe (3), and a mixed pressure transmitter (72) is installed on the output air supply pipe (71).

7. The oxygen content automatic regulating gas supply device according to claim 6, characterized in that: It also includes an alarm unit (13), wherein the alarm unit (13) and the air pressure cut-off valve (23) are both connected to a controller (5), and the controller (5) is used to receive a detection signal and output an alarm signal when the oxygen content exceeds a limit value, so as to control the alarm unit (13) to sound an alarm.

8. The oxygen content automatic regulating gas supply device according to claim 7, characterized in that: The compressed air intake pipe (2) is provided with an air pressure cut-off valve (23), and the nitrogen intake pipe (3) is provided with a nitrogen cut-off valve (32). The air pressure transmitter (22), the nitrogen pressure transmitter (31), the mixed pressure transmitter (72), the air pressure cut-off valve (23), and the nitrogen cut-off valve (32) are all connected to the controller (5). The air pressure transmitter (22), the nitrogen pressure transmitter (31), and the mixed pressure transmitter (72) are respectively used to detect the air pressure in the compressed air intake pipe (2), the nitrogen intake pipe (3), and the output air supply pipe (71) and output a first monitoring signal, a second monitoring signal, and a third monitoring signal. The controller (5) is used to receive the first monitoring signal, the second monitoring signal, and the third monitoring signal. and controlling the air pressure cut-off valve (23) to close when the pressure in the air pressure intake pipe (2) exceeds a first threshold value; When the pressure in the nitrogen inlet pipe (3) exceeds a second threshold value, the air pressure cut-off valve (23) and the nitrogen cut-off valve (32) are controlled to close; When the pressure in the output air supply pipe (71) exceeds a third threshold, the air pressure cut-off valve (23) is controlled to close first, and when the oxygen content alarm signal is released, the nitrogen cut-off valve (32) is controlled to close.

9. The oxygen content automatic regulating gas supply device according to claim 1, characterized in that: It also includes a control panel (14) and a display module (15), wherein the display module (15) and the control panel (14) are both connected to the controller (5), the control panel (14) is used to adjust the set interval according to the user's operation, and the controller (5) is used to receive the detection signal and control the display to display the oxygen content.

10. The oxygen content automatic regulating gas supply device according to claim 1, characterized in that: It also comprises a mobile vehicle (1), wherein the compressed air intake pipe (2), the nitrogen intake pipe (3), the mixing tank (4), the controller (5), the oxygen content detection unit (6) and the mixing tank (4) are all installed on the mobile vehicle (1).

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