Trace moisture content analysis device for gas

Abstract

The trace moisture content analysis device for the gas comprises an analysis tube, an electrode plate, a first dielectric layer, a second dielectric layer, a main control unit and a detection mechanism, and the detection mechanism comprises a rotating motor, a rotating rod, an electric sliding table, a sealing box and a sealing mechanism. The rotating motor can rotate the first dielectric layer or the second dielectric layer to the position between the electrode plates, dielectric materials of the first dielectric layer and the second dielectric layer are different, and when gas to be detected is conveyed to the position between the electrode plates, the dielectric materials can adsorb moisture in the gas to be detected, so that the dielectric constant is changed; therefore, the capacitance value of the capacitor formed between the electrode plates is changed, the moisture content in the gas can be judged by detecting the capacitance value, and the accuracy of the detection result can be improved by evaluating the dielectric layers made of different dielectric materials; the sealing box can seal the other dielectric layer, and it is guaranteed that the conditions of the dielectric layers detected twice are the same.

Description

Technical Field

[0001] The utility model relates to the technical field of gas processing, in particular to a device for analyzing trace moisture content in gas. Background Art

[0002] Oxygen is one of the essential substances for maintaining human life. In addition to being used for breathing by humans and animals, it is also needed in combustion, metal cutting and welding, wastewater treatment, metallurgy and other fields. The current oxygen content in the atmospheric environment is about 21%, which is completely sufficient for the breathing of humans and animals. However, since the atmosphere also contains other gases such as nitrogen, it is impossible to use the atmosphere directly for operations in other fields. Higher-purity oxygen is required, so oxygen needs to be prepared. The current method of preparing oxygen is mainly water electrolysis. During the electrolysis process, due to the increase in temperature, part of the water will evaporate into water vapor and be transported to the subsequent links along with the oxygen. Therefore, after the water electrolysis method is completed, oxygen production is completed. After that, it needs to be dried to remove the moisture in the oxygen. Before and after drying, the trace moisture content in the oxygen needs to be detected and analyzed. The commonly used detection method is the resistance-capacitance method, which transports the oxygen containing moisture through the capacitors and analyzes the moisture contained in the oxygen through the change in the capacitance value of the capacitors. However, since the oxygen is flowing and the moisture distribution is not very uniform, the measurement and analysis results are not accurate enough when using the resistance-capacitance method to measure the moisture content. In addition, since the dielectric constant changes after the dielectric layer absorbs water, if the measurement is continued, the measurement error will become larger and larger, and the accuracy of the moisture measurement results cannot be guaranteed. As a result, the oxygen finally produced still contains moisture, affecting the normal development of work in the corresponding field. Utility Model Content

[0003] In view of this, the present invention proposes a trace moisture content analysis device for gas, which can use different dielectric materials to detect the moisture content in the gas to ensure the accuracy of the moisture detection result.

[0004] The technical solution of the present utility model is achieved as follows:

[0005] A device for analyzing trace moisture content in gas, comprising an analysis tube, an electrode plate, a first dielectric layer, a second dielectric layer, a main control unit, and a detection mechanism, wherein the electrode plates are relatively arranged on the top and bottom surfaces inside the analysis tube, the dielectric materials on the first dielectric layer and the second dielectric layer are different, the detection mechanism comprises a rotating motor, a rotating rod, an electric slide, a sealing box, and a sealing mechanism, the rotating motor is arranged on the top surface inside the analysis tube, its output shaft is connected to the top surface of the rotating rod, the two ends of the rotating rod are respectively connected to the first dielectric layer and the second dielectric layer, the area between the electrode plates is located on the rotation path of the first dielectric layer and the second dielectric layer, the electric slide is arranged on the top surface inside the analysis tube, the bottom surface of its mover is connected to the top surface of the sealing box, the side wall of the sealing box is provided with a through groove, the sealing mechanism is used to seal the through groove, the main control unit is arranged on the top surface of the analysis tube, and is respectively electrically connected to the electrode plate, the rotating motor, the electric slide, and the sealing mechanism.

[0006] Preferably, it further comprises a control valve, which is provided on the analysis tube and located on the side of the electrode plate away from the rotating motor, and the main control unit is electrically connected to the control valve.

[0007] Preferably, the sealing mechanism includes an annular airbag, an air supply pipeline and an air pump, the annular airbag is arranged on the passage groove, the air pump is arranged on the top surface of the sealing box, the air supply pipeline connects the air pump and the annular airbag, and the main control unit is electrically connected to the air pump.

[0008] Preferably, the sealing mechanism further includes an air vent pipe and an air valve, the air vent pipe is connected to the gas pipeline, the air valve is arranged on the air vent pipe, and the main control unit is electrically connected to the air valve.

[0009] Preferably, the detection mechanism further includes an electric push rod, which is arranged on the bottom surface of the mover of the electric slide, and its output shaft is connected to the top surface of the sealing box, and the main control unit is electrically connected to the electric push rod.

[0010] Preferably, a stirring mechanism is also included, which includes a stirring motor, a stirring shaft and blades. The stirring motor is arranged on the bottom surface of the analysis tube and is located on the side of the control valve away from the electrode plate. The bottom end of the stirring shaft is connected to the output shaft of the stirring motor. The blades are arranged on the outer wall of the stirring shaft. The main control unit is electrically connected to the stirring motor.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] ① After the gas to be tested enters the analysis tube, it will flow between the upper and lower electrode plates. A first dielectric layer or a second dielectric layer is provided between the electrode plates. After the first dielectric layer or the second dielectric layer absorbs water, the dielectric constant changes, and the capacitance value of the capacitor formed by the electrode plates changes. The change in capacitance value can be used to determine the trace moisture contained in the gas, and thus analyze it for timely treatment.

[0013] ② The first dielectric layer and the second dielectric layer can be replaced by the rotating motor, and the dielectric materials of the first dielectric layer and the second dielectric layer are different. Therefore, the accuracy of the measurement results can be evaluated through two measurements to ensure the accuracy of the moisture content detection results and avoid affecting subsequent applications in other fields;

[0014] ③ The dielectric layer not located between the electrode plates can be sealed by a sealing box to prevent moisture in the gas from contacting the dielectric material when the gas flows in the analysis tube, thereby ensuring that the conditions for moisture content detection on the front and back sides are the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic structural diagram of a device for analyzing trace moisture content in gas according to the present invention;

[0017] Figure 2 This is a schematic diagram of the connection structure of a sealing box and a sealing mechanism of a device for analyzing trace moisture content in gas according to the present invention;

[0018] In the figure, 1 is an analysis tube, 2 is an electrode plate, 3 is a first dielectric layer, 4 is a second dielectric layer, 5 is a main control unit, 6 is a rotating motor, 7 is a rotating rod, 8 is an electric slide, 9 is a sealing box, 10 is a travel groove, 11 is a control valve, 12 is an annular airbag, 13 is a gas pipeline, 14 is an air pump, 15 is a venting pipe, 16 is an air valve, 17 is an electric push rod, 18 is a stirring motor, 19 is a stirring shaft, and 20 is a blade. DETAILED DESCRIPTION

[0019] In order to better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0020] See also Figures 1 to 2The present invention provides a device for analyzing the trace moisture content of gas, comprising an analysis tube 1, an electrode plate 2, a first dielectric layer 3, a second dielectric layer 4, a main control unit 5, and a detection mechanism. The electrode plate 2 is relatively arranged on the top and bottom surfaces of the interior of the analysis tube 1. The dielectric materials on the first dielectric layer 3 and the second dielectric layer 4 are different. The detection mechanism includes a rotating motor 6, a rotating rod 7, an electric slide 8, a sealing box 9, and a sealing mechanism. The rotating motor 6 is arranged on the top surface of the analysis tube 1, and its output shaft is connected to the top surface of the rotating rod 7. The two ends of the rotating rod 7 are respectively connected to the first dielectric layer 3 and the second dielectric layer 4. The area between the electrode plates 2 is located on the rotation path of the first dielectric layer 3 and the second dielectric layer 4. The electric slide 8 is arranged on the top surface of the analysis tube 1, and the bottom surface of its mover is connected to the top surface of the sealing box 9. The side wall of the sealing box 9 is provided with a through groove 10, and the sealing mechanism is used to seal the through groove 10. The main control unit 5 is arranged on the top surface of the analysis tube 1 and is electrically connected to the electrode plate 2, the rotating motor 6, the electric slide 8 and the sealing mechanism.

[0021] A capacitor is formed between the upper and lower electrode plates 2, and the first dielectric layer 3 or the second dielectric layer 4 can be located between the electrode plates 2. The gas to be detected is transported to the analysis tube 1, and the gas will first pass between the electrode plates 2. The moisture in the gas will be absorbed by the dielectric material on the first dielectric layer 3 or the second dielectric layer 4 and change the dielectric constant. At this time, the capacitance value of the capacitor formed between the electrode plates 2 changes. The main control unit 5 uses an STM32 series single-chip microcomputer. After detecting the capacitance value through the peripheral circuit, the water absorption of the dielectric material can be judged, thereby determining the trace moisture content in the gas, and thereby evaluating the purity of the produced gas. When the moisture content is high, it can be processed in time to avoid affecting subsequent use.

[0022] The first dielectric layer 3 and the second dielectric layer 4 are arranged at both ends of the rotating rod 7. The rotating motor 6 can drive the first dielectric layer 3 or the second dielectric layer 4 to move between the electrode plates 2 through the rotating rod 7. The dielectric materials used for the first dielectric layer 3 and the second dielectric layer 4 are different. The moisture content is detected by dielectric layers of different materials, which can improve the accuracy of the detection results. During the detection, if the first dielectric layer 3 is located between the electrode plates 2, the second dielectric layer 4 will be located on the outside of the electrode plates 2. At this time, the electric slide 8 can be started. The electric slide 8 can drive the sealing box 9 to move, so that the passing groove 10 passes through the second dielectric layer 4, and finally the second dielectric layer 4 is covered inside the sealing box 9. Then the sealing mechanism can seal the passing groove 10. When the moisture content is detected, the moisture in the gas can be prevented from being adsorbed by the second dielectric layer 4, ensuring that the conditions for moisture content detection before and after the first dielectric layer 3 and the second dielectric layer 4 are the same, further improving the accuracy of the detection results.

[0023] Preferably, a control valve 11 is further included. The control valve 11 is provided on the analysis tube 1 and is located on the side of the electrode plate 2 away from the rotating motor 6 . The main control unit 5 is electrically connected to the control valve 11 .

[0024] The control valve 11 is used to control the gas inlet of the analysis tube 1 . After the control valve 11 is opened, the gas to be detected can enter between the electrode plates 2 .

[0025] Preferably, the sealing mechanism includes an annular airbag 12, an air supply pipe 13 and an air pump 14, the annular airbag 12 is arranged on the passage groove 10, the air pump 14 is arranged on the top surface of the sealing box 9, the air supply pipe 13 connects the air pump 14 and the annular airbag 12, the main control unit 5 is electrically connected to the air pump 14, the sealing mechanism also includes an air release pipe 15 and an air valve 16, the air release pipe 15 is connected to the air supply pipe 13, the air valve 16 is arranged on the air release pipe 15, and the main control unit 5 is electrically connected to the air valve 16.

[0026] When the first dielectric layer 3 or the second dielectric layer 4 is located in the sealing box 9, the air pump 14 is turned on. The air pump 14 will transport the external air to the annular airbag 12 through the air supply pipe 13. After the annular airbag 12 is inflated, it can seal the passage groove 10 to prevent the gas to be tested from entering the sealing box 9 through the passage groove 10 during moisture content detection. When the position of the first dielectric layer 3 and the second dielectric layer 4 needs to be replaced, the air valve 16 can be controlled to open, so that the air in the annular airbag 12 is discharged to the outside through the air supply pipe 13 and the air release pipe 15, so that the sealing box 9 can be driven by the electric slide 8 to move away from the second dielectric layer 4.

[0027] Preferably, the detection mechanism further includes an electric push rod 17 , which is arranged on the bottom surface of the mover of the electric slide 8 , and its output shaft is connected to the top surface of the sealing box 9 , and the main control unit 5 is electrically connected to the electric push rod 17 .

[0028] The electric push rod 17 is used to drive the sealing box 9 to move up and down, so that the passage groove 10 descends to one side of the first dielectric layer 3 or the second dielectric layer 4. The sealing box 9 is set to a lifting form and can be suitable for the first dielectric layer 3 or the second dielectric layer 4 of different dielectric materials.

[0029] Preferably, a stirring mechanism is further included, which includes a stirring motor 18, a stirring shaft 19 and a blade 20. The stirring motor 18 is arranged on the inner bottom surface of the analysis tube 1 and is located on the side of the control valve 11 away from the electrode plate 2. The bottom end of the stirring shaft 19 is connected to the output shaft of the stirring motor 18, and the blade 20 is arranged on the outer wall of the stirring shaft 19. The main control unit 5 is electrically connected to the stirring motor 18.

[0030] After the gas to be tested enters the analysis tube 1, the control valve 11 is not opened first. Driven by the rotating motor 6, the stirring shaft 19 and the blades 20 can stir the gas to be tested so that the moisture contained therein is evenly distributed to ensure the accuracy of the test results.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for analyzing trace moisture content in gas, characterized in that: It includes an analysis tube, an electrode plate, a first dielectric layer, a second dielectric layer, a main control unit and a detection mechanism. The electrode plates are relatively arranged on the top and bottom surfaces inside the analysis tube. The dielectric materials on the first dielectric layer and the second dielectric layer are different. The detection mechanism includes a rotating motor, a rotating rod, an electric slide, a sealing box and a sealing mechanism. The rotating motor is arranged on the top surface inside the analysis tube, and its output shaft is connected to the top surface of the rotating rod. The two ends of the rotating rod are respectively connected to the first dielectric layer and the second dielectric layer. The area between the electrode plates is located on the rotation path of the first dielectric layer and the second dielectric layer. The electric slide is arranged on the top surface inside the analysis tube, and the bottom surface of its mover is connected to the top surface of the sealing box. The side wall of the sealing box is provided with a through groove. The sealing mechanism is used to seal the through groove. The main control unit is arranged on the top surface of the analysis tube and is electrically connected to the electrode plate, the rotating motor, the electric slide and the sealing mechanism respectively.

2. A device for analyzing trace moisture content in gas according to claim 1, characterized in that: It also includes a control valve, which is arranged on the analysis tube and located on the side of the electrode plate away from the rotating motor. The main control unit is electrically connected to the control valve.

3. The device for analyzing trace moisture content in gas according to claim 1, characterized in that: The sealing mechanism includes an annular airbag, an air pipeline and an air pump. The annular airbag is arranged on the passage groove, the air pump is arranged on the top surface of the sealing box, the air pipeline connects the air pump and the annular airbag, and the main control unit is electrically connected to the air pump.

4. A device for analyzing trace moisture content in gas according to claim 3, characterized in that: The sealing mechanism further includes an air vent pipe and an air valve. The air vent pipe is connected to the gas pipeline. The air valve is arranged on the air vent pipe. The main control unit is electrically connected to the air valve.

5. The device for analyzing trace moisture content in gas according to claim 1, characterized in that: The detection mechanism further includes an electric push rod, which is arranged on the bottom surface of the mover of the electric slide, and whose output shaft is connected to the top surface of the sealing box. The main control unit is electrically connected to the electric push rod.

6. The device for analyzing trace moisture content in gas according to claim 2, characterized in that: It also includes a stirring mechanism, which includes a stirring motor, a stirring shaft and blades. The stirring motor is arranged on the bottom surface of the analysis tube and is located on the side of the control valve away from the electrode plate. The bottom end of the stirring shaft is connected to the output shaft of the stirring motor. The blades are arranged on the outer wall of the stirring shaft. The main control unit is electrically connected to the stirring motor.

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