Multi-channel carbon dioxide gas analysis and detection device

Abstract

The invention relates to the field of gas analysis and detection devices, and discloses a multi-channel carbon dioxide gas analysis and detection device.The multi-channel carbon dioxide gas analysis and detection device comprises a drainage tube, control keys, a liquid crystal screen and a main body detector. Then the liquid crystal screen controls the light source device to emit infrared laser to penetrate through air in the air chamber, the infrared laser penetrates through the air chamber and then is guided to the optical spectrum instrument by the optical filter on the inner side of the detection mechanism to detect the laser intensity, and when carbon dioxide in the air is detected by the laser in the air chamber, the circulation efficiency of carbon dioxide discharged into the air chamber is higher than that of carbon dioxide discharged by the discharging structure; and when the air in the air chamber is increased, the inclined plate is pushed to be slowly discharged from the staggered gaps, so that a certain amount of air in the air chamber is kept for linear irradiation detection of the light source device, and inaccurate detection caused by too fast circulation of the air in the air chamber when the air is discharged is prevented.

Description

Technical Field

[0001] The invention relates to the field of gas analysis and detection devices, in particular to a multi-channel carbon dioxide gas analysis and detection device. Background Art

[0002] In the detection of carbon dioxide, the infrared light source emits infrared light with a wavelength of 1-20μm. After being absorbed by the carbon dioxide in the gas chamber, these lights pass through a narrow-band filter with a wavelength of 4.26μm, and finally the infrared detector monitors the intensity of the infrared light passing through this wavelength. This intensity is proportional to the concentration of carbon dioxide, thereby realizing the measurement of carbon dioxide concentration. By using two independent channels to measure the same signal, the measurement results can be averaged or combined, thereby reducing measurement errors and improving measurement accuracy. The existing multi-channel carbon dioxide detection is mainly used in industrial production, indoor air quality monitoring, greenhouse gas emissions monitoring and other fields.

[0003] However, the density of carbon dioxide is greater than that of air, so it will sink naturally. During detection, the air chamber for infrared detection is in a state of gas circulation. Carbon dioxide will be discharged directly from the lower outlet as it sinks. Under the force of extracting air, the air is discharged from the air chamber faster than it is discharged into the air chamber. The carbon dioxide content in a certain space in the air chamber changes rapidly, which can easily affect the detection of carbon dioxide concentration in the air. In a humid environment, the air contains more water vapor, which can easily follow the water vapor into the air chamber and stay on the glass lens surface of the laser transmitter, which can easily cause tilted infrared irradiation and inaccurate detection. Summary of the invention

[0004] The present invention provides a multi-channel carbon dioxide gas analysis and detection device, which overcomes the shortcomings described in the background technology.

[0005] The technical solution adopted by the present invention to solve its technical problem is: A multi-channel carbon dioxide gas analysis and detection device, comprising a drainage tube, a control key, a liquid crystal screen, and a main body detector, wherein the liquid crystal screen is arranged in the middle of the outer surface of the main body detector, five control keys are arranged on the surface of the main body detector, and the control keys and the liquid crystal screen are connected and controlled by a line, and the drainage tube is threadedly fixed to the upper end of the main body detector; The detection mechanism on the side structure of the main detector is embedded in the interior of the shell, and a gas meter is provided below the two air pumps. The amount of gas passing through is proportional to the detected carbon dioxide in the detection mechanism, and the two air pumps are connected to the drainage tubes at the upper ends by pipelines respectively. The two air pumps are connected to the pipelines at the upper ends of the detection mechanism respectively. The light source is embedded in the upper end of the detection mechanism, and the spectrometer is located directly below the detection mechanism. The flow pipe is sealed and connected to the pipeline at the lower side of the detection mechanism. The detection mechanism as a whole is two layers, and the drainage tube at the upper end can be connected to the outside world for two channel detection connections. The detection mechanism, the light source and the spectrometer are respectively connected to the LCD screen circuit control. A filter is provided inside the detection mechanism, and the filter, the light source and the spectrometer are located in the same straight line position; The detection mechanism is wrapped by a filter plate and a box body, and a splicing plate is provided in the middle to separate the box body, so that the two detection mechanisms are divided into four air chambers. The outer end of the exhaust structure is connected to the flow pipe channel, and the joint pipe is connected to the bottom of the vacuum pump through a pipeline. The splicing plate is a common structure between the two air chambers, and the splicing plate is provided with two left and right channels for air to flow into the air chamber, and then the splicing plate cooperates with the air circulation guided by the joint pipe inside the filter plate, and the outer end of the limiting structure is movably cooperated in the shell, and the light source irradiates linearly in the air chamber and then passes through the filter to be detected by the spectrometer. When the carbon dioxide in the air is discharged into the air chamber, it is blocked by the exhaust structure, so that a certain amount of air is maintained in the air chamber for linear irradiation detection by the light source.

[0006] A better technical solution: the discharge structure is provided with a fixed plate engaged with the side of the box body, and the limiting structure moves horizontally on the side of the fixed plate, the sheath is arranged on the limiting structure and the inclined plate, so that the limiting structure and the inclined plate are connected as one and moveable, the rubber plate is attached to the outer side of the inclined plate and rubs against the inner side of the fixed plate, the sheath is divided into two rows, and the two rows of sheaths are staggered with each other. When the air moves from the inner mesh of the air chamber to discharge the structure position, it is blocked by the staggered sheath.

[0007] A better technical solution: when the limiting structure moves, it drives the inclined plate connected to the sheath to move outward, and then the inclined plate tilts outward with the rubber plate as the center to form an open state, and the inclined plate is inclined toward the direction of the air chamber, and when the air in the air chamber is blocked, the inclined plate is slowly pushed to move, and then the exhaust structure exhausts air more efficiently than the air discharged into the splicing plate channel, so that the air in the air chamber can stay inside for a longer time, which has the effect of maintaining a certain amount of air in the air chamber, and when the carbon dioxide sinks, it is slowly discharged from the light source under the push of the air in the air chamber, thereby increasing the retention time of carbon dioxide in the air chamber.

[0008] A better technical solution: the limiting structure is provided with a push-pull plate and a card sheath embedded, and the push-pull plate maintains a horizontal movable state in the fixed plate, the outer end of the push-pull plate is against the outer side of the rotating rod, and the rotating rod is limited and fixed on the inner side of the box body and can rotate. There are two magnets, which are distributed on both sides of the outer side of the rotating rod, and the two magnets and the push-pull plate are mutually attracted or repelled. The outside world can manually rotate the rotating rod to make the magnet repel the push-pull plate, and then the limiting structure drives the inclined plate to tilt toward the inner direction of the air chamber to produce a blockage. When the air in the air chamber needs to be discharged, the rotating rod is rotated to make the magnet attract the push-pull plate, and then the push-pull plate is driven to tilt outward to form an open state to facilitate the air to be guided outward for discharge.

[0009] A better technical solution: the middle of the filter plate is an open groove, and the upper end of the open groove is connected to the joint pipe, and the lower end of the open groove is connected to the channel inside the splicing plate. The bent plate is fitted on the inner side of the inclined sealing plate, and the bent plates are symmetrically distributed on the left and right sides with the open groove as the center.

[0010] A better technical solution: the bending plate includes a rubber block and a plastic plate. The rubber block is attached to the inner side of the sealing plate and connected to and fixed to the plastic plate. The sponge strips are attached to the arc-shaped surface of the plastic plate at intervals. When air flows downward from the opening groove, the plastic plate is pushed. Then, the plastic plate opens and closes the two bending plates through the elasticity of the rubber block. When the air is discharged downward at the opening groove position, the plastic plate is pushed. The air is guided from the arc of the plastic plate to push the bending plate, so that the moisture in the air is absorbed and retained by the sponge strips to prevent water vapor in the air from entering the air chamber below.

[0011] Compared with the prior art, this technical solution has the following advantages: In the present invention, the vacuum pump draws external air through the drainage tube, so that the air enters the two air chambers from the joint pipe through the filter plate and the splicing plate, and then the LCD screen controls the light source to emit an infrared laser to pass through the air in the air chamber. After passing through the air chamber, the infrared laser is guided by the filter on the inside of the detection mechanism to the spectrometer to detect the laser intensity. When the carbon dioxide in the air is detected by the laser in the air chamber, the flow efficiency of the air discharged into the air chamber is higher than the discharge efficiency of the discharge structure, so that a certain amount of air is maintained in the air chamber. When the air in the air chamber increases, the inclined plate is pushed to be slowly discharged from the dislocated gap, so that a certain amount of air is maintained in the air chamber for linear irradiation detection by the light source, so as to prevent the air in the air chamber from flowing too fast when discharged, causing inaccurate detection.

[0012] In the present invention, the air drawn in enters the filter plate from the joint pipe, and the air is guided from the open groove to the channel in the splicing plate at the lower end. The air connected to the same drainage pipe is detected in the left and right air chambers to realize multi-channel analysis and detection. The average value of the detection results of the two air chambers is taken to enhance the accuracy of the detection. When the air passes through the open groove, the bending plate is pushed to bend downward, so that the air is pushed down by the rubber block on the plastic plate and bounces down. When the air is guided and circulated on the curved surface of the plastic plate, the sponge strip absorbs water vapor in the air, thereby preventing water vapor in the air from entering the air chamber and affecting the infrared laser analysis and detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 A schematic diagram of the side structure of the main detector.

[0016] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the detection mechanism.

[0017] Figure 4 It is a schematic diagram of the side structure of the discharge structure.

[0018] Figure 5 It is a schematic diagram of the plane structure of the limiting structure.

[0019] Figure 6 It is a schematic diagram of the side structure of the filter plate.

[0020] Figure 7 Schematic diagram of the three-dimensional structure of the bent plate.

[0021] In the figure: drainage tube 1, control key 2, LCD screen 3, main detector 4, detection mechanism 41, vacuum pump 42, circulation tube 43, light source 44, spectrometer 45, shell 46, discharge structure 411, filter plate 412, joint tube 413, box body 414, limit structure 415, splicing plate 416, sheath 4111, tilting plate 4112, rubber plate 4113, fixing plate 4114, rotating rod 4151, push-pull plate 4152, magnet 4153, opening slot 121, sealing plate 122, bending plate 123, sponge strip 1231, plastic plate 1232, rubber block 1233. DETAILED DESCRIPTION

[0022] like Figure 1-Figure 7As shown, a multi-channel carbon dioxide gas analysis and detection device includes a drainage tube 1, a control key 2, a liquid crystal screen 3, and a main body detector 4. The liquid crystal screen 3 is arranged in the middle of the outer surface of the main body detector 4. Five control keys 2 are arranged on the surface of the main body detector 4, and the control keys 2 and the liquid crystal screen 3 are connected and controlled by a line. The drainage tube 1 is threadedly fixed to the upper end of the main body detector 4; The detection mechanism 41 on the side structure of the main detector 4 is embedded in the interior of the shell 46, and a gas meter is provided below the two air pumps 42. The amount of gas passing through is proportional to the detected carbon dioxide in the detection mechanism 41, and the two air pumps 42 are respectively connected to the drainage tube 1 at the upper end by pipelines. The two air pumps 42 are respectively connected to the upper end pipeline of the detection mechanism 41, and the light source 44 is embedded in the upper end of the detection mechanism 41. The spectrometer 45 is located directly below the detection mechanism 41, and the flow pipe 43 is sealed and connected to the pipeline at the lower side of the detection mechanism 41. The detection mechanism 41 is a two-layer whole, and the drainage tube 1 at the upper end can be connected to the outside world for two channel detection connections. The detection mechanism 41, the light source 44 and the spectrometer 45 are respectively connected to the line control of the liquid crystal screen 3. A filter is provided inside the detection mechanism 41, and the filter, the light source 44 and the spectrometer 45 are located in the same straight line position; The detection mechanism 41 is wrapped by a filter plate 412 and a box body 414, and a splicing plate 416 is provided in the middle to separate the box body 414, so that the two detection mechanisms 41 are divided into four air chambers, the outer end of the exhaust structure 411 is connected to the flow pipe 43 channel, the joint pipe 413 is connected to the bottom of the vacuum pump 42 by a pipeline, the splicing plate 416 is a common structure between the two air chambers, and the splicing plate 416 is provided with two left and right channels for air to flow into the air chamber, and then the splicing plate 416 cooperates with the air circulation guided by the joint pipe 413 inside the filter plate 412, the outer end of the limiting structure 415 is movably cooperated in the shell 46, the light source 44 irradiates linearly in the air chamber and then passes through the filter to be detected by the spectrometer 45, when the carbon dioxide in the air is discharged into the air chamber, it is blocked by the exhaust structure 411, so that a certain amount of air is maintained in the air chamber for linear irradiation detection by the light source 44.

[0023] Among them, the exhaust structure 411 is provided with a fixed plate 4114 which is engaged with the side of the box body 414, and the limiting structure 415 is movable in translation on the side of the fixed plate 4114, and the sheath 4111 is arranged on the limiting structure 415 and the inclined plate 4112, so that the limiting structure 415 and the inclined plate 4112 are connected as a whole to achieve a movable effect, and the rubber plate 4113 is attached to the outer side of the inclined plate 4112 and rubs against the inner side of the fixed plate 4114, and the sheath 4111 is divided into two rows, upper and lower, and the two rows of sheaths 4111 are staggered with each other. When the air moves from the inner mesh of the air chamber to the exhaust structure 411, it is blocked by the staggered sheath 4111.

[0024] Among them, when the limiting structure 415 moves, it drives the inclined plate 4112 connected to the sheath 4111 to move outward, and then the inclined plate 4112 tilts outward with the rubber plate 4113 as the center to form an open state, and the inclined plate 4112 tilts toward the direction of the air chamber, and when the air in the air chamber is blocked, the inclined plate 4112 is slowly pushed to move, and then the exhaust structure 411 exhausts air more efficiently than the air discharged into the channel of the splicing plate 416, so that the air in the air chamber can stay inside for a longer time, which has the effect of maintaining a certain amount of air in the air chamber, and when the carbon dioxide sinks, it is slowly discharged from the light source 44 under the push of the air in the air chamber, thereby increasing the retention time of carbon dioxide in the air chamber.

[0025] Among them, the limiting structure 415 is provided with a push-pull plate 4152 embedded with the card sheath 4111, and the push-pull plate 4152 maintains a horizontal active state in the fixed plate 4114, the outer end of the push-pull plate 4152 is against the outer side of the rotating rod 4151, and the rotating rod 4151 is limited and fixed on the inner side of the box body 414 and can rotate. There are two magnets 4153, which are distributed on both sides of the outer side of the rotating rod 4151, and the two magnets 4153 and the push-pull plate 4152 are mutually attracted or repelled. The outside can manually rotate the rotating rod 4151 to make the magnet 4153 repel the push-pull plate 4152, and then the limiting structure 415 drives the inclined plate 4112 to tilt toward the inner direction of the air chamber to produce a blockage. When the air in the air chamber needs to be discharged, the rotating rod 4151 is rotated to make the magnet 4153 adsorb the push-pull plate 4152, thereby driving the push-pull plate 4152 to tilt outward to form an open state to facilitate the air to be guided outward for discharge.

[0026] In addition, the middle of the filter plate 412 is an open groove 121, and the upper end of the open groove 121 is connected to the joint pipe 413, and the lower end of the open groove 121 is connected to the channel inside the splicing plate 416. The bent plate 123 is attached to the inner side of the inclined sealing plate 122, and the bent plates 123 are symmetrically distributed on the left and right sides with the open groove 121 as the center.

[0027] Among them, the curved plate 123 includes a rubber block 1233 and a plastic plate 1232. The rubber block 1233 is attached to the inner side of the sealing plate 122 and is connected to and fixed to the plastic plate 1232. The sponge strips 1231 are attached to the arc state of the surface of the plastic plate 1232 at intervals. When air flows downward from the opening groove 121, it pushes the plastic plate 1232, and then the plastic plate 1232 opens and closes the two curved plates 123 through the elasticity of the rubber block 1233. When the air is discharged downward at the position of the opening groove 121, it pushes the plastic plate 1232. The air is guided from the arc of the plastic plate 1232 to push the curved plate 123, so that the moisture in the air is absorbed and retained by the sponge strips 1231 to prevent the water vapor in the air from entering the air chamber below.

[0028] In the present invention, the vacuum pump 42 draws air from the outside through the drainage tube 1, so that the air enters the two air chambers from the joint pipe 413 through the filter plate 412 and the splicing plate 416, and then the LCD screen 3 controls the light source 44 to emit an infrared laser to pass through the air in the air chamber. After passing through the air chamber, the infrared laser is guided by the filter on the inner side of the detection mechanism 41 to the spectrometer 45 to detect the laser intensity. When the carbon dioxide in the air is detected by the laser in the air chamber, the flow efficiency of the air discharged into the air chamber is higher than the discharge efficiency of the discharge structure 411, so that a certain amount of air is maintained in the air chamber. When the air in the air chamber increases, the inclined plate 4112 is pushed to be slowly discharged from the dislocated gap, so that a certain amount of air is maintained in the air chamber for the linear irradiation detection of the light source 44, so as to prevent the air in the air chamber from flowing too fast when discharged, causing inaccurate detection. Among them, rotating the rotating rod 4151 in the external world can repel the magnet 4153 and the push-pull plate 4152, so that the push-pull plate 4152 keeps being pushed inward, and then the inclined plate 4112 keeps being inclined inward to form a dislocation barrier to the air. When the detection is completed, the rotating rod 4151 is rotated to make the magnet 4153 absorb the push-pull plate 4152, and then the push-pull plate 4152 translates outward in the fixed plate 4114, pulling the inclined plate 4112 outward to produce an open state, so that the air in the air chamber can be quickly discharged under the extraction force.

[0029] In the present invention, the air drawn in enters the filter plate 412 from the joint pipe 413, and the air is guided from the open groove 121 to the channel in the splicing plate 416 at the lower end. The air connected to the same drainage tube 1 is detected through the left and right air chambers to realize multi-channel analysis and detection. The average value of the detection results of the two air chambers is taken to enhance the accuracy of the detection. When the air passes through the open groove 121, the bending plate 123 is pushed to bend downward, so that the air is pushed down by the rubber block 1233 on the plastic plate 1232 and bounces down. When the air is guided to circulate on the curved surface of the plastic plate 1232, the sponge strip 1231 absorbs water vapor in the air, thereby preventing water vapor in the air from entering the air chamber and affecting the infrared laser analysis and detection.

[0030] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A multi-channel carbon dioxide gas analysis and detection device, characterized in that: The device comprises a drainage tube (1), a control key (2), a liquid crystal screen (3), and a main body detector (4); the liquid crystal screen (3) is arranged in the middle of the outer surface of the main body detector (4); five control keys (2) are arranged on the surface of the main body detector (4); and the control keys (2) and the liquid crystal screen (3) are connected and controlled by a line; the drainage tube (1) is threadedly fixed to the upper end of the main body detector (4); The detection mechanism (41) of the side structure of the main detector (4) is embedded in the interior of the shell (46), and a gas meter is provided below the two air pumps (42). The amount of gas passing through the detection mechanism (41) is proportional to the detected carbon dioxide, and the two air pumps (42) are respectively connected to the drainage tube (1) at the upper end by pipelines. The two air pumps (42) are respectively connected to the upper end pipelines of the detection mechanism (41). The light source (44) is embedded in the upper end of the detection mechanism (41). The spectrometer (45) ) is located directly below the detection mechanism (41), the flow pipe (43) is sealed and connected to the pipe at the lower side of the detection mechanism (41), the detection mechanism (41) as a whole is two layers, the drainage pipe (1) at the upper end thereof can be connected to the outside world for two channel detection connections, the detection mechanism (41), the light source (44) and the spectrometer (45) are respectively connected to the liquid crystal screen (3) circuit control, and the detection mechanism (41) is provided with a filter inside, and the filter, the light source (44) and the spectrometer (45) are located in the same straight line position; The detection mechanism (41) is formed by wrapping a filter plate (412) and a box body (414), and a splicing plate (416) is provided in the middle to separate the box body (414), so that the two detection mechanisms (41) are divided into four air chambers. The outer end of the discharge structure (411) is connected to the channel of the circulation pipe (43), and the joint pipe (413) is connected to the bottom of the air pump (42) by a pipeline. The splicing plate (416) is a common structure between the two air chambers, and the splicing plate (416) is provided with two left and right channels for air to flow into the air chamber, and then the splicing plate (416) cooperates with the air flow guided by the joint pipe (413) inside the filter plate (412). The outer end of the limiting structure (415) is movably cooperated in the shell (46). The light source (44) is linearly irradiated in the air chamber and then passed through the filter to be detected by the spectrometer (45). When the carbon dioxide in the air is discharged into the air chamber, it is blocked by the discharge structure (411).

2. A multi-channel carbon dioxide gas analysis and detection device according to claim 1, characterized in that: The discharge structure (411) is provided with a fixing plate (4114) engaged with the side of the box body (414), and the limiting structure (415) is movable in translation on the side of the fixing plate (4114). The sheath (4111) is arranged on the limiting structure (415) and the inclined plate (4112), so that the limiting structure (415) and the inclined plate (4112) are connected as a whole to achieve a movable effect. The rubber plate (4113) is attached to the outer side of the inclined plate (4112) and rubs against the inner side of the fixing plate (4114). The sheath (4111) is divided into two rows, upper and lower, and the two rows of sheaths (4111) are staggered with each other. When air moves from the position of the inner net of the air chamber to discharge the structure (411), it is blocked by the staggered sheath (4111).

3. A multi-channel carbon dioxide gas analysis and detection device according to claim 1 or 2, characterized in that: When the limiting structure (415) moves, it drives the inclined plate (4112) connected to the sheath (4111) to move outward, and then the inclined plate (4112) tilts outward with the rubber plate (4113) as the center to form an open state. The inclined plate (4112) tilts toward the air chamber. When the air in the air chamber is blocked, the inclined plate (4112) is slowly pushed to move, and then the efficiency of the exhaust structure (411) to exhaust air is lower than that of the air discharged into the splicing plate (416) channel.

4. A multi-channel carbon dioxide gas analysis and detection device according to claim 2, characterized in that: The limiting structure (415) is provided with a push-pull plate (4152) embedded with the sheath (4111), and the push-pull plate (4152) maintains a horizontal movable state in the fixed plate (4114), the outer end of the push-pull plate (4152) abuts against the outer side of the rotating rod (4151), and the rotating rod (4151) is limited and fixed on the inner side of the box (414) to be able to rotate, and two magnets (4153) are provided, which are distributed on both sides of the outer side of the rotating rod (4151), and the two magnets (4153) and the push-pull plate (4152) are mutually attracted or repelled.

5. A multi-channel carbon dioxide gas analysis and detection device according to claim 2, characterized in that: The middle of the filter plate (412) is an open groove (121), and the upper end of the open groove (121) is connected to the joint pipe (413), and the lower end of the open groove (121) is connected to the channel inside the splicing plate (416). The bent plate (123) is attached to the inner side of the inclined sealing plate (122), and the bent plates (123) are symmetrically distributed on the left and right sides with the open groove (121) as the center.

6. A multi-channel carbon dioxide gas analysis and detection device according to claim 5, characterized in that: The bending plate (123) comprises a rubber block (1233) and a plastic plate (1232); the rubber block (1233) is attached to the inner side of the sealing plate (122) and is connected and fixed to the plastic plate (1232); the sponge strips (1231) are attached to the arc-shaped surface of the plastic plate (1232) at intervals; when air flows downward from the opening groove (121), the plastic plate (1232) is pushed; and then the plastic plate (1232) opens and closes the two bending plates (123) through the elasticity of the rubber block (1233).

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