Gas supply device

Abstract

The utility model discloses a gas supply device which comprises a first heating assembly, a gas pressure reduction assembly, a plurality of temperature sensors and a plurality of pressure sensors, the output end of the first heating assembly is connected with the input end of the gas pressure reduction assembly, and the gas pressure reduction assembly is further connected with a flow control assembly. The input end of the flow control assembly is connected with the output end of the gas pressure reduction assembly; the output end of the flow control assembly is connected with a gas testing device. The device can be used for heating and decompressing input carbon dioxide gas, so that the environment temperature of the carbon dioxide gas input into the gas testing device is not lower than the critical temperature, and the environment pressure is not higher than the critical pressure; the pressure and the temperature in the device are detected, and the temperature and / or the pressure of the gas are / is adjusted in time according to the environment temperature and / or the environment pressure, so that the gas is prevented from being liquefied in the device, and gasification of the liquid carbon dioxide is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical experimental devices, and particularly relates to a gas supply device. Background Art

[0002] Carbon dioxide is a carbon oxide compound; in terms of physical properties, the critical temperature of carbon dioxide is 31.26 degrees Celsius (°C), and the critical pressure of carbon dioxide is 72.9 megapascals (MPa). When the temperature of carbon dioxide is below the critical temperature and the pressure is above the critical pressure, carbon dioxide is in a liquid state; when the temperature of carbon dioxide is above the critical temperature, gaseous carbon dioxide will not liquefy no matter how high the pressure is.

[0003] In some scientific experiments, carbon dioxide gas with a pressure exceeding the critical pressure is usually used. If the ambient temperature is lower than the critical temperature at this time, since a pressure reducing valve is provided in some equipment, when the critical carbon dioxide flows through the pressure reducing valve and the pressure is lower than the critical pressure, the liquid carbon dioxide will vaporize, resulting in a sharp expansion of the volume of carbon dioxide, thus bringing potential explosion hazards. Content of the Utility Model

[0004] The purpose of the utility model is to provide a gas supply device to solve the problem that in current experiments, the ambient temperature of carbon dioxide gas is lower than the critical temperature and the ambient pressure is lower than the critical pressure, resulting in the liquefaction of nitrogen dioxide, and in subsequent use, due to changes in ambient temperature and / or pressure, the liquid carbon dioxide vaporizes, causing a sharp expansion of the gas volume.

[0005] To solve the above technical problems, the utility model provides a gas supply device, which includes a first heating component, a gas pressure reducing component, a plurality of temperature sensors and pressure sensors. The output end of the first heating component is connected to the input end of the gas pressure reducing component. The gas pressure reducing component is also connected with a flow control component, and the input end of the flow control component is connected to the output end of the gas pressure reducing component; the output end of the flow control component is connected to a gas test device.

[0006] Furthermore, a gas filtering component is also provided between the first heating component and the gas pressure reducing component. The input end of the gas filtering component is connected to the output end of the first heating component, and the output end of the gas filtering component is connected to the input end of the gas pressure reducing component.

[0007] Furthermore, a pneumatic boosting component is also provided between the flow control component and the gas test device. The input end of the pneumatic boosting component is connected to the output end of the flow control component, and the output end of the pneumatic boosting component is connected to the input end of the gas test device.

[0008] Further, the input end of the pneumatic boosting component is also connected with a first buffer component. The output end of the first buffer component is connected with the pneumatic boosting component, the input end of the first buffer component is connected with the output end of the flow control component, and a temperature sensor and a pressure sensor are arranged on the first buffer component.

[0009] Further, the output end of the pneumatic boosting component is connected with a second buffer component. The input end of the second buffer component is connected with the output end of the pneumatic boosting component, the output end of the second buffer component is connected with the gas test device, and a temperature sensor and a pressure sensor are arranged on the second buffer component.

[0010] Further, a gas pressure stabilizing component is also arranged between the second buffer component and the gas test device. The input end of the gas pressure stabilizing component is connected with the output end of the second buffer component, and the output end of the gas pressure stabilizing component is connected with the input end of the gas test device.

[0011] Further, a second heating component is arranged between the gas pressure stabilizing component and the gas test device. The input end of the second heating component is connected with the output end of the gas pressure stabilizing component, and the output end of the second heating component is connected with the input end of the gas test device.

[0012] Further, the input end of the gas test device is also connected with a third buffer component. The input end of the third buffer component is connected with the output end of the second heating component, the output end of the third buffer component is connected with the input end of the gas test device, and a temperature sensor and a pressure sensor are arranged on the third buffer component.

[0013] Further, a gas condensation component is also connected to the output end of the gas test device.

[0014] Further, the gas supply device further includes a host computer, and the host computer is communicatively connected with the first heating component, the second heating component, the gas pressure reducing component, the pneumatic boosting component, the first buffer component, the second buffer component, the third buffer component and the gas pressure stabilizing component.

[0015] The beneficial effects of the gas supply device provided by the present utility model are as follows: compared with the prior art, the first heating component and the first pressure reducing component are provided to heat and reduce the pressure of the input carbon dioxide gas, ensuring that the ambient temperature of the carbon dioxide gas input into the gas test device is not lower than the critical temperature and the ambient pressure is not higher than the critical pressure. At the same time, a plurality of temperature sensors and pressure sensors are also arranged in the device to detect the pressure and temperature in the device, and timely adjust the temperature and / or pressure of the carbon dioxide according to the ambient temperature and / or ambient pressure, thereby avoiding the liquefaction of the carbon dioxide gas in the device and preventing the gasification of the liquid carbon dioxide. Description of the Drawings

[0016] Figure 1It is a schematic diagram of the overall structure of the gas supply device. Specific embodiments

[0017] In order to better understand the purpose, structure and function of the present invention, the following will further describe in detail a gas supply device of the present invention with reference to the attached Figure 1 drawings.

[0018] As Figure 1 shown, a gas supply device according to an embodiment of the present invention is provided with a first heating component 11. The carbon dioxide gas required for the experiment is first input into the first heating component 11, and the first heating component 11 performs the first heating on the carbon dioxide gas to ensure that the temperature of the carbon dioxide gas exceeds the critical temperature, because as long as the temperature of the carbon dioxide gas exceeds the critical temperature, the gas will not liquefy.

[0019] In the present invention, the output end of the first heating component 11 is connected to the input end of the gas filtering component 40. The gas filtering component 40 filters the input gas and removes some impurities to reduce the impact on subsequent instrument equipment; for example, impurities will affect the accuracy of the measuring instrument.

[0020] After being filtered, the carbon dioxide gas is input into the gas pressure reducing component 20, that is, the output end of the gas filtering component 40 is connected to the input end of the gas pressure reducing component 20, where the carbon dioxide gas is decompressed. The purpose of decompression has two aspects. The first aspect is that the subsequent flow control component 30 can bear a limited pressure, so it is convenient to control the flow rate and measurement after decompression; the second aspect is that after decompression, the possibility of carbon dioxide liquefaction can be reduced again. Usually during the experiment, the gas pressure is decompressed to below 3 MPa.

[0021] The output end of the gas pressure reducing component 20 is connected to the input end of the flow control component 30. The decompressed carbon dioxide gas is input into the flow control component 30, and the flow control component 30 can monitor and measure the input carbon dioxide gas. The experimenter controls the flow control component 30 through the upper computer according to the current experimental situation, so as to adjust the flow rate of the carbon dioxide output by the flow control component 30. That is, if the supply of carbon dioxide gas in the current device is sufficient, the flow control component 30 will reduce the output of carbon dioxide. If more carbon dioxide is still needed in the current device, the flow control component 30 will increase the output of carbon dioxide to maintain the continuous progress of the experiment.

[0022] The gas output by the flow control component 30 is transported to the pneumatic booster component 50, and buffer components are provided at both the input end and the output end of the pneumatic booster component 50. That is, the output end of the flow control component 30 is connected to the input end of the first buffer component 61, the output end of the first buffer component 61 is connected to the input end of the pneumatic booster component 50, and the output end of the pneumatic booster component 50 is connected to the input end of the second buffer component 62. The pneumatic booster component 50 is provided here for the purpose of increasing the pressure of the carbon dioxide gas to the pressure required for subsequent tests, and in some cases, the gas pressure will exceed the critical pressure. To avoid the liquefaction of the gas exceeding the critical pressure caused by the decrease in ambient temperature, temperature sensors and pressure sensors are provided on both the first buffer component 61 and the second buffer component 62 before and after the pneumatic booster component 50. The gas input and output during the operation of the pneumatic booster component 50 will be in the form of pulses rather than smooth gas. Therefore, the first buffer component 61 is provided between the pneumatic booster component 50 and the flow control component 30, which can reduce the impact of the pulsed intake gas of the pneumatic booster component 50 on the flow control component 30. Not only that, temperature sensors and pressure sensors are also provided on the first buffer component 61 to monitor the temperature and pressure of the current gas, and the upper computer can read the data of the temperature sensors and pressure sensors. Once it is found that the temperature of the current gas is close to the critical temperature and / or the pressure is close to the critical pressure, the first heating component 11 will be controlled to increase the temperature of the subsequent gas and / or the gas pressure reducing component 20 will reduce the pressure, and provide a reference for the boosting operation of the pneumatic booster component 50. The gas output after being boosted by the pneumatic booster component 50 is also in the form of pulses rather than a smooth output. Therefore, the output end of the pneumatic booster component 50 is connected to the second buffer component 62. The gas boosted and output by the pneumatic booster component 50 will be temporarily stored in the second buffer component 62 first, and the gas output from the second buffer component 62 will be smooth gas, reducing the impact on subsequent instrument equipment. Temperature sensors and pressure sensors are also provided on the second buffer component 62, which can provide data support for the upper computer to operate the first heating component 11, the gas pressure reducing component 20, and the pneumatic booster component 50. If the pneumatic booster component 50 increases the pressure of the gas above the critical pressure, it may be necessary to increase the temperature of the gas output by the first heating component 11 so that the temperature of the gas boosted by the pneumatic booster component 50 is still above the critical temperature.

[0023] The output end of the second buffer component 62 is connected to a gas pressure stabilizing component 70. The function of the gas pressure stabilizing component 70 is to provide a stable pressure for subsequent instrument equipment under the control of the upper computer, reducing the impact caused by the pressure change of the pneumatic booster pump 50.

[0024] The output end of the gas pressure stabilizing component 70 is connected to the input end of the second heating component 12. The first heating component 11 is for preheating and is relatively far from the gas test device 81. Therefore, a second heating component 12 is also provided in front of the gas test device 81. The second heating component 12 is controlled by the host computer and heats the carbon dioxide gas to the temperature required for the test.

[0025] In the present utility model, the output end of the second heating component 12 is connected to the input end of the third buffer component 63. The third buffer component 63 temporarily stores the gas heated by the second heating component 12 and supplies the amount of carbon dioxide gas required by the gas test device 81 to the gas test device 81. A temperature sensor and a pressure sensor are also provided on the gas test device 81 to monitor whether the temperature and pressure of the gas supplied to the gas test device 81 meet the test requirements. If the gas temperature in the third buffer component 63 does not meet the test requirements, the host computer will adjust the second heating component 12; if the gas pressure in the third buffer component 63 does not meet the test requirements, the host computer will adjust the pneumatic boosting component 50 and / or the gas pressure stabilizing component 70. Moreover, the output amount of the gas of the flow control component 30 can also be adjusted so that the temperature and pressure supplied by the third buffer component 63 to the gas test device 81 both meet the test requirements.

[0026] The output end of the gas test device 81 is also connected to a gas condensation component 90, which condenses the waste gas discharged from the gas test device 81 and then discharges it to reduce environmental pollution.

[0027] Communication modules are provided in the first heating component 11, the second heating component 12, the gas pressure reducing component 20, the pneumatic boosting component 50, the first buffer component 61, the second buffer component 62, the third buffer component 63 and the gas pressure stabilizing component 70 in this device. These communication modules can communicate with the host computer. The host computer can read the current data of the above components and control the above components based on these data.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A gas supply device, characterized in that: The invention comprises a first heating component (11), a gas decompression component (20) and a plurality of temperature sensors and pressure sensors, wherein the output end of the first heating component (11) is connected to the input end of the gas decompression component (20), the gas decompression component (20) is also connected to a flow control component (30), the input end of the flow control component (30) is connected to the output end of the gas decompression component (20); and the output end of the flow control component (30) is connected to a gas testing device (81).

2. The gas supply device according to claim 1, characterized in that: A gas filter component (40) is also provided between the first heating component (11) and the gas decompression component (20); the input end of the gas filter component (40) is connected to the output end of the first heating component (11), and the output end of the gas filter component (40) is connected to the input end of the gas decompression component (20).

3. The gas supply device according to claim 1, characterized in that: A pneumatic booster component (50) is also provided between the flow control component (30) and the gas test device (81), wherein the input end of the pneumatic booster component (50) is connected to the output end of the flow control component (30), and the output end of the pneumatic booster component (50) is connected to the input end of the gas test device (81).

4. The gas supply device according to claim 3, characterized in that: The input end of the pneumatic booster component (50) is also connected to a first buffer component (61), the output end of the first buffer component (61) is connected to the pneumatic booster component (50), the input end of the first buffer component (61) is connected to the output end of the flow control component (30), and the first buffer component (61) is provided with a temperature sensor and a pressure sensor.

5. The gas supply device according to claim 3, characterized in that: The output end of the pneumatic booster component (50) is connected to a second buffer component (62), the input end of the second buffer component (62) is connected to the output end of the pneumatic booster component (50), the output end of the second buffer component (62) is connected to the gas testing device (81), and the second buffer component (62) is provided with a temperature sensor and a pressure sensor.

6. The gas supply device according to claim 5, characterized in that: A gas pressure stabilizing component (70) is also provided between the second buffer component (62) and the gas test device (81), and the input end of the gas pressure stabilizing component (70) is connected to the output end of the second buffer component (62), and the output end of the gas pressure stabilizing component (70) is connected to the input end of the gas test device (81).

7. The gas supply device according to claim 6, characterized in that: A second heating component (12) is provided between the gas pressure stabilizing component (70) and the gas testing device (81); an input end of the second heating component (12) is connected to an output end of the gas pressure stabilizing component (70), and an output end of the second heating component (12) is connected to an input end of the gas testing device (81).

8. The gas supply device according to claim 7, characterized in that: The input end of the gas test device (81) is also connected to a third buffer component (63), the input end of the third buffer component (63) is connected to the output end of the second heating component (12), the output end of the third buffer component (63) is connected to the input end of the gas test device (81), and the third buffer component (63) is provided with a temperature sensor and a pressure sensor.

9. The gas supply device according to claim 8, characterized in that: The output end of the gas testing device (81) is also connected to a gas condensation component (90).

10. The gas supply device according to claim 1, characterized in that: The gas supply device also includes a host computer, and a communication module is provided in the first heating component (11), the second heating component (12), the gas decompression component (20), the pneumatic booster component (50), the first buffer component (61), the second buffer component (62), the third buffer component (63) and the gas pressure stabilization component (70), and the communication module is used to communicate with the host computer.

Images