Multi-channel pollutant gas distribution instrument

Abstract

The utility model discloses a multi-channel pollutant gas distribution instrument, and belongs to the technical field of gas preparation. The multi-channel pollutant gas distributor comprises a shell, a gas pump, a first electric three-way valve, a second electric three-way valve, a power interface, a control switch, a first gas flow controller and a second gas flow controller, the external connector is arranged on a side plate of the shell, the gas mixing pipe, the clean dry air supply part, the moisture supply part and the standard gas supply part are arranged in the shell, a power interface and a control switch are fixedly arranged on one side of the shell, a controller is arranged in the shell, and a touch screen is arranged on one side of the shell; and an electric valve is arranged on a pipeline between the gas mixing pipe and the external connecting joint. The multi-channel pollutant gas distribution instrument is compact in structure, the internal space is fully utilized, a pipeline connecting structure is reasonably arranged in the limited space, the multi-channel pollutant gas distribution instrument is convenient to carry, and the pipeline structure is convenient to clean.

Description

Technical Field

[0001] The utility model relates to the technical field of gas preparation, in particular to a multi-channel pollutant gas distribution instrument. Background Art

[0002] With the improvement of people's living standards, the strengthening of public environmental awareness, and the advancement of science and technology, people's requirements for the ambient air quality in their living and working environments are becoming increasingly higher. Under actual environmental conditions, pollutants in indoor environments coexist. Volatile organic compounds such as formaldehyde, toluene, benzene, and xylene coexist in newly decorated rooms, and pollutants such as nitrogen oxides, sulfur oxides, and carbon monoxide also coexist in motor vehicle exhaust. Therefore, exploring the simultaneous purification performance of functional materials for multiple pollutants is more relevant to actual application environments.

[0003] Traditional methods for evaluating the purification performance of functional materials primarily rely on dynamic purification testing systems to assess the material's performance against a single pollutant. These devices can only quantitatively assess a single pollutant and are unable to meet the requirements for evaluating purification performance across multiple pollutants. A continuous, stable emission source containing multiple pollutants is fundamental to evaluating the purification performance of functional materials.

[0004] How to achieve accurate preparation of multiple gas mixtures and clean the pipelines after preparing the mixed gases have become problems that researchers need to solve. Utility Model Content

[0005] The utility model provides a multi-channel pollutant gas distribution instrument, which can quantitatively distribute multiple target pollutants at the same time, and can flexibly adjust parameters such as the type, concentration, flow rate, humidity, etc. of the pollutants according to the detection requirements. After the gas distribution is completed, the internal pipeline structure can be cleaned, laying the foundation for the purification performance evaluation of multifunctional materials.

[0006] The utility model provides the following technical solutions:

[0007] A multi-channel pollutant gas distribution instrument, comprising:

[0008] case;

[0009] An external connection joint is provided on the side plate of the shell and is used to connect to a gas collecting device to output the mixed gas;

[0010] A gas mixing pipe is arranged inside the shell;

[0011] The gas mixing tube and the external connection joint are connected via a pipeline;

[0012] The clean dry air supply unit includes an air inlet fixedly arranged at the bottom of one side of the housing, an air pump and an air purification device fixedly arranged on the bottom plate inside the housing, the air inlet and the air inlet of the air pump, and the air outlet of the air pump and the input end of the air purification device are connected by pipelines, and the output end of the air purification device is connected to the first interface of the first electric three-way valve through a pipeline;

[0013] The wet gas supply unit is arranged inside the shell, including a first clean gas pipeline and a humidifying tank. The bottom end of the side wall of the humidifying tank is provided with a dry gas inlet, and the upper end of the side wall of the humidifying tank is provided with a wet gas outlet. The second interface of the first electric three-way valve is connected to the dry gas inlet of the humidifying tank through the first clean gas pipeline, and the wet gas outlet is connected to the gas mixing pipe through the wet pipeline.

[0014] The standard gas supply unit includes a plurality of standard gas input connectors fixedly mounted on the bottom of one side of the housing and a second electric three-way valve; one end of the standard gas input connectors is mounted outside the housing, and the other end of the standard gas input connectors is mounted inside the housing. Each standard gas input connector is connected to a first interface of the second electric three-way valve via a short-circuit gas pipe. The second interface of the second electric three-way valve is connected to one end of a standard gas pipeline, and the other end of the standard gas pipeline is connected to a gas mixing pipe. The second electric three-way valve is located near the standard gas input connectors.

[0015] A first gas flow controller is provided on the first clean gas pipeline, and a second gas flow controller is provided on each standard gas pipeline;

[0016] The third interface of the first electric three-way valve is connected to the second clean gas pipeline; a diverter tee is provided in the second clean gas pipeline to divide the clean gas into multiple branches, and the ends of the branches are connected to the third interface of the second electric three-way valve;

[0017] A power interface and a control switch are fixedly provided on one side of the shell, a controller is provided inside the shell, and a touch screen is provided on one side of the shell;

[0018] The air pump, the first electric three-way valve, the second electric three-way valve, the power interface, the control switch, the first gas flow controller and the second gas flow controller are electrically connected to the controller respectively;

[0019] An electric valve is provided on the pipeline between the gas mixing pipe and the external connection joint, and the electric valve is electrically connected to the controller.

[0020] According to the aforementioned multi-channel pollutant gas distribution instrument, a third gas flow controller is provided on the second clean gas pipeline, and the third gas flow controller is electrically connected to the controller.

[0021] According to the aforementioned multi-channel pollutant gas distribution instrument, standard gas connection joints are provided at equal intervals along the circumference of the side wall end of the gas mixing tube, and the second interface of the second electric three-way valve and the standard gas connection joints are connected via a standard gas pipeline;

[0022] A wet gas connection joint is provided on the end plane of the gas mixing tube close to the standard gas connection joint, and a wet gas pipeline is connected between the wet gas outlet and the wet gas connection joint of the gas mixing tube;

[0023] A mixed gas output joint is provided on the end plane of the gas mixing tube away from the standard gas connection joint, and the mixed gas output joint is connected to the external connection joint through a pipeline.

[0024] According to the aforementioned multi-channel pollutant gas distribution instrument, the air purification device includes a color-changing silicone tube and an activated carbon tube. The output end of the color-changing silicone tube and the input end of the activated carbon tube are connected by a pipeline. The air outlet of the air pump and the input end of the color-changing silicone tube are connected by a pipeline. The output end of the activated carbon tube is connected to the first interface of the first electric three-way valve through a pipeline.

[0025] Furthermore, it also includes a mounting bracket for fixing the gas mixing tube, the color-changing silicone tube and the activated carbon tube;

[0026] The mounting bracket includes two horizontal plates spaced apart from each other, the ends of the horizontal plates being fixed to the inner surfaces of the two opposite side plates of the housing by screws, and two longitudinal plates being vertically spaced apart in the middle of the horizontal plates, the color-changing silicone tube and the activated carbon tube being on one side of the longitudinal plates, and the gas mixing tube being on the other side of the longitudinal plates, and the gas mixing tube, the color-changing silicone tube and the activated carbon tube being staggered.

[0027] The gas mixing tube, the color-changing silicone tube and the activated carbon tube are respectively fixed on the longitudinal plate through C-shaped buckles.

[0028] According to the aforementioned multi-channel pollutant gas distribution instrument, it also includes a support rod, the bottom of the support rod is fixedly arranged on the upper surface of the bottom plate of the shell, and the top of the support rod is connected to the bottom of the humidification tank.

[0029] According to the aforementioned multi-channel pollutant gas distribution instrument, a plurality of axially spaced spoilers are provided in the gas mixing tube.

[0030] According to the aforementioned multi-channel pollutant gas distribution instrument, the gas mixing pipe is divided into three sections along the axial direction, namely the gas input section, the gas mixing section and the gas output section, and the three sections are connected by threads;

[0031] Fans are tightly fitted inside the two ends of the gas mixing section.

[0032] According to the aforementioned multi-channel pollutant gas distribution instrument, a sealing top cover is provided on the top of the humidification tank, and the sealing top cover is located on the top plate of the shell.

[0033] Furthermore, a water level sensor is provided in the humidifying tank, and the water level sensor is electrically connected to the controller.

[0034] The utility model has the following beneficial effects:

[0035] (1) The multi-channel pollutant gas distribution instrument has the characteristics of intelligence, which can accurately control the content of each component gas in the mixed gas to obtain a mixed gas that meets the test requirements, while reducing the workload of the test personnel;

[0036] (2) Dry air can be introduced into the position of the second electric three-way valve. When the pipeline needs to be cleaned, the dry air will discharge the standard gas in the standard gas pipeline to avoid the standard gas remaining in the standard gas pipeline and affecting the next gas preparation;

[0037] (3) The multi-channel pollutant gas distribution instrument has a compact structure, fully utilizes the internal space, and reasonably arranges the connection structure of the pipeline within the limited space, making it easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A three-dimensional diagram of a multi-channel pollutant gas distribution instrument;

[0039] Figure 2 A three-dimensional diagram of the shell and internal structure of the multi-channel pollutant gas distribution instrument;

[0040] Figure 3 A three-dimensional diagram of the internal structure of the multi-channel pollutant gas distribution instrument Figure 1 ;

[0041] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0042] Figure 5 A three-dimensional diagram of the internal structure of the multi-channel pollutant gas distribution instrument Figure 2 ;

[0043] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0044] Figure 7 This is a rear view of the internal structure of the multi-channel pollutant gas distribution instrument;

[0045] Figure 8 It is a side view of the internal structure of the multi-channel pollutant gas distribution instrument;

[0046] Figure 9 A three-dimensional diagram of the combined state of the standard gas supply unit and the gas mixing tube of the multi-channel pollutant gas distribution instrument;

[0047] Figure 10A three-dimensional diagram of the assembly state of the mounting bracket, gas mixing tube, color-changing silicone tube, and activated carbon tube;

[0048] Figure 11 A top view of the assembly state of the mounting bracket, gas mixing tube, color-changing silicone tube, and activated carbon tube;

[0049] Figure 12 A side view of the assembly state of the mounting bracket, gas mixing tube, color-changing silicone tube, and activated carbon tube;

[0050] Figure 13 A three-dimensional diagram of a gas mixing tube;

[0051] Figure 14 A top view of a gas mixing tube;

[0052] Figure 15 for Figure 14 Cross-sectional view in CC direction;

[0053] Figure 16 This is an exploded diagram of a gas mixing tube;

[0054] Figure 17 is a cross-sectional view of another gas mixing tube;

[0055] Figure 18 A three-dimensional diagram of the assembled state of the humidifying tank and the sealing top cover;

[0056] Figure 19 It is a front view of the assembled state of the humidifying tank and the sealing top cover;

[0057] Figure 20 for Figure 19 Cross-sectional view in the middle DD direction;

[0058] Figure 21 This is the schematic diagram of the multi-channel pollutant gas distribution instrument.

[0059] In the figure, 1. Shell; 2. External connection joint; 3. Gas mixing pipe; 301. Standard gas connection joint; 302. Wet gas connection joint; 303. Mixed gas output joint; 304. Gas input section; 305. Gas mixing section; 306. Gas output section; 4. Air inlet; 5. Air pump; 6. Air purification device; 601. Color-changing silicone tube; 602. Activated carbon tube; 7. First electric three-way valve; 8. First clean gas pipeline; 9. Humidifier tank; 901. Dry gas inlet; 902. Wet gas outlet; 10. Sealing top cover; 11. Standard gas input joint; 12. Second electric three-way valve; 13. Short-circuit gas pipe; 14. First gas flow controller; 15. Second gas flow controller; 16. Power interface; 17. Control switch; 18. Controller; 19. Touch screen; 20. Electric valve; 21. Second clean gas pipeline; 22. Third gas flow controller; 23. Diverter tee; 24. Standard gas pipeline; 25. Wet gas pipeline; 26. Mounting bracket; 2601. Horizontal plate; 2602. Vertical plate; 2603. C-shaped buckle; 27. Support rod; 28. Spoiler; 29. ​​Fan; 30. Water level sensor. DETAILED DESCRIPTION

[0060] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be combined with the accompanying drawings to Figures 1 to 21 The specific embodiments are described in detail.

[0061] The multi-channel pollutant gas distribution instrument of the present invention comprises a housing 1, a clean dry air supply, a standard gas supply, a wet gas supply and a gas mixing tube 3 disposed within the housing 1, and an external connector 2 disposed on a side panel of the housing 1. The gas mixing tube 3 and the external connector 2 are connected by a pipeline. The wet air and standard gas are mixed within the gas mixing tube 3. The external connector 2 is used to connect to a gas collection device to output the mixed gas.

[0062] The clean dry air supply unit includes an air inlet 4 fixedly mounted on the bottom side of the housing 1, an air pump 5 fixedly mounted on the floor within the housing 1, and an air purification device 6. A pipeline connects the air inlet 4 to the air inlet of the air pump 5, the air outlet of the air pump 5 to the input of the air purification device 6, and the output of the air purification device 6 to the first port of the first electric three-way valve 7. Under the action of the air pump 5, external air enters the pipeline structure from the air inlet 4, and is purified in the air purification device 6 to produce dry air free of impurities.

[0063] The wet gas supply unit includes a first clean gas pipeline 8 and a humidification tank 9. A sealed top cover 10 is located on the top plate of the housing 1. A dry gas inlet 901 is located at the bottom of the side wall of the humidification tank 9, and a wet gas outlet 902 is located at the top of the side wall of the humidification tank 9. The second port of the first electric three-way valve 7 is connected to the dry gas inlet 901 of the humidification tank 9 via the first clean gas pipeline 8. The wet gas outlet 902 is connected to the gas mixing pipe 3 via a wet pipe 25. Clean gas from the clean dry air supply unit is passed into the humidification tank 9 to obtain wet gas, which is then transferred to the gas mixing pipe 3 via the wet pipe 25. The wet gas supply unit regulates the humidity of the standard gas within a range of 20% to 90%.

[0064] like Figure 9 As shown, the standard gas supply unit includes a plurality of standard gas input connectors 11 fixedly mounted on the bottom of one side of the shell 1 and a second electric three-way valve 12. The plurality of standard gas input connectors 11 and the air inlet 4 are all mounted on the bottom of the same side of the shell 1. One end of the standard gas input connector 11 is mounted on the outside of the shell 1 for connecting to the gas output pipe of the tank of the gaseous pollution source; the other end of the standard gas input connector 11 is mounted on the inside of the shell 1. Each standard gas input connector 11 is connected to the first interface of the second electric three-way valve 12 via a short-circuit gas pipe 13. The second interface of the second electric three-way valve 12 is connected to one end of a standard gas pipeline 24, the other end of which is connected to the gas mixing pipe 3. The second electric three-way valve 12 is close to the standard gas input connector 11, so that the residual gas between the short-circuit gas pipes 13 can be reduced after the mixed gas is configured.

[0065] A first gas flow controller 14 is installed on the first clean gas pipeline 8 to detect and control the flow of wet gas. Each standard gas pipeline 24 is equipped with a second gas flow controller 15 to detect and control the flow of the standard gas. The first gas flow controller 14 has a flow control range of 0 to 6 L / min, and humidity is regulated by adjusting the first gas flow controller 14. The second gas flow controller 15 has a flow control range of 1 to 18 L / min, and the flow of the standard gas is regulated by adjusting the second gas flow controller 15.

[0066] like Figure 1 As shown, a power interface 16 and a control switch 17 are fixedly provided on one side of the housing 1 , a controller 18 is provided inside the housing 1 , and a touch screen 19 is provided on one side of the housing 1 .

[0067] The air pump 5 , the first electric three-way valve 7 , the second electric three-way valve 12 , the power interface 16 , the control switch 17 , the first gas flow controller 14 , the third gas flow controller 22 , and the second gas flow controller 15 are electrically connected to the controller 18 , respectively.

[0068] An electric valve 20 is provided on the pipeline between the gas mixing pipe 3 and the external connection joint 2 , and the electric valve 20 is electrically connected to the controller 18 .

[0069] The third port of the first electric three-way valve 7 is connected to a second clean gas pipeline 21. A third gas flow controller 22 is provided on this second clean gas pipeline 21 to detect and control the flow of dry gas, facilitating pipeline cleaning. A diverter tee 23 is provided in this second clean gas pipeline 21 to divide the clean gas into multiple branches, each of which is connected to the third port of the second electric three-way valve 12. Dry air can be introduced into the second electric three-way valve 12. When the pipeline needs to be cleaned, the dry air expel the standard gas from the standard gas pipeline 24, preventing any residual standard gas from remaining in the standard gas pipeline 24 and affecting the next gas preparation.

[0070] The first gas flow controller 14 , the second gas flow controller 15 and the third gas flow controller 22 may be gas flow controllers 18 of model EDC-360 manufactured by Bosifeier Instrument Technology Co., Ltd., which have the characteristics of high precision.

[0071] The tester can input the gas parameters to be mixed on the touch screen 19. After the controller 18 obtains the input data information from the touch screen 19, the controller 18 controls the operation of the air pump 5, the first electric three-way valve 7, the second electric three-way valve 12, the first gas flow controller 14, and the second gas flow controller 15. The controller 18 displays the operating status and status parameters of the air pump 5, the first electric three-way valve 7, the second electric three-way valve 12, the first gas flow controller 14, and the second gas flow controller 15 on the touch screen 19. The multi-channel pollutant gas distribution instrument is intelligent and can precisely control the content of each component gas in the mixed gas to obtain a mixed gas that meets the test requirements, while also reducing the workload of the tester.

[0072] Standard gas connection joints 301 are provided at equal intervals along the circumference of the side wall end of the gas mixing tube 3, and the second interface of the second electric three-way valve 12 and the standard gas connection joint 301 are connected by a standard gas pipeline 24. A wet gas connection joint 302 is provided on the end plane of the gas mixing tube 3 close to the standard gas connection joint 301, and a wet gas pipeline 25 is connected between the wet gas outlet 902 and the wet gas connection joint 302 of the gas mixing tube 3. A mixed gas output joint 303 is provided on the end plane of the gas mixing tube 3 away from the standard gas connection joint 301, and the mixed gas output joint 303 and the external connection joint 2 are connected by a pipeline. Wet air and standard gas are input from one end of the gas mixing tube 3 and output from the other end of the gas mixing tube 3, and uniform mixing of the gases is achieved in the middle part of the gas mixing tube 3.

[0073] Air purification device 6 includes a color-changing silicone tube 601 and an activated carbon tube 602. A pipeline connects the output end of color-changing silicone tube 601 to the input end of activated carbon tube 602. A pipeline also connects the air outlet of air pump 5 to the input end of color-changing silicone tube 601. The output end of activated carbon tube 602 is connected to the first port of first electric three-way valve 7 via a pipeline. Color-changing silicone tube 601 removes moisture and impurities from the air, while activated carbon tube 602 absorbs impurities, ensuring air cleanliness in the system.

[0074] like Figure 10 As shown, the housing 1 also includes a mounting bracket 26 for securing the gas mixing tube 3, the color-changing silicone tube 601, and the activated carbon tube 602. The mounting bracket 26 comprises two transverse plates 2601 spaced apart from each other. The ends of the transverse plates 2601 are fixed to the inner surfaces of two opposing side panels of the housing 1 via screws. Two longitudinal plates 2602 are vertically spaced apart in the middle of the transverse plates 2601. The color-changing silicone tube 601 and the activated carbon tube 602 are located on one side of the longitudinal plates 2602, while the gas mixing tube 3 is located on the other side of the longitudinal plates 2602. The gas mixing tube 3, the color-changing silicone tube 601, and the activated carbon tube 602 are staggered to fully utilize the internal space of the housing 1. The gas mixing tube 3, the color-changing silicone tube 601, and the activated carbon tube 602 are each secured to the longitudinal plates 2602 via C-shaped clips 2603.

[0075] like Figure 8 As shown, it also includes a support rod 27, the bottom of the support rod 27 is fixedly set on the upper surface of the bottom plate of the shell 1, and the top of the support rod 27 is connected to the bottom of the humidification tank 9. The support rod 27 is used to support the humidification tank 9 on the bottom plate of the shell 1, providing installation space for the gas pipeline.

[0076] The housing 1 of the multi-channel pollutant gas distribution instrument has dimensions of 40 cm in length, 30 cm in width, and 30 cm in height. The compact structure fully utilizes the internal space, and the pipe connection structure is reasonably arranged within the limited space, making it easy to carry.

[0077] In order to make the wet air and the standard gas mix evenly in the gas mixing tube 3, a plurality of axially spaced spoilers 28 are provided in the gas mixing tube 3, such as Figure 17 Alternatively, the gas mixing tube 3 is divided into three sections along the axial direction, namely the gas input section 304, the gas mixing section 305 and the gas output section 306. The three sections are detachably connected. Specifically, the three sections are connected by threads. The two ends of the gas mixing section 305 are tightly fitted with fans 29, as shown. Figure 15 and Figure 16 As shown, the gas is filled into the gas mixing tube 3, driving the fan 29 to rotate, and the fan 29 further stirs the gas inside the gas mixing tube 3 to achieve further uniform mixing.

[0078] A water level sensor 30 is provided in the humidification tank 9 and is electrically connected to the controller 18. When the humidification tank 9 is short of water, the water level sensor 30 transmits the water shortage information to the controller 18 and displays the water shortage status on the touch screen 19, reminding the tester to replenish water in the humidification tank 9 in time.

[0079] Figure 21 This is a schematic diagram of a multi-channel pollutant gas distribution instrument. This utility model features intelligent features, precisely controlling the content of each component gas in the mixed gas to obtain a mixed gas that meets test requirements. It is easy to operate, reduces the workload of test personnel, and can play an important role in the field of environmental protection, with broad application prospects.

[0080] The method for using the multi-channel pollutant gas distribution instrument of the utility model comprises the following steps:

[0081] S1. Connect the power cord to the power interface 16, turn on the control switch 17, connect the standard gas input connector 11 to the tank of the gaseous pollution source through a pipeline, and connect the external connection connector 2 to the gas collection device through a pipeline;

[0082] S2. Select the gas distribution function on the touch screen 19 and input the gas parameters, including target pollutant concentration, humidity and gas flow rate;

[0083] The controller 18 controls the first interface of the first electric three-way valve 7 to communicate with the second interface, and closes the third interface of the first electric three-way valve 7 to provide moisture to the gas mixing pipe 3;

[0084] The controller 18 controls the first interface and the second interface of the second electric three-way valve 12 to be connected, and the third interface of the second electric three-way valve 12 to be closed, so as to provide standard gas to the gas mixing pipe 3;

[0085] The controller 18 controls the first gas flow controller 14 to regulate the wet gas flow and controls the second gas flow controller 15 to adjust the standard gas flow;

[0086] The controller 18 controls the electric valve 20 to open;

[0087] S3. After the set parameter requirements are met, disconnect the external connection connector 2 from the gas collection device;

[0088] S4, selecting the cleaning function on the touch screen 19;

[0089] The controller 18 controls the first interface of the first electric three-way valve 7 to communicate with the third interface, and the second interface of the first electric three-way valve 7 to be closed;

[0090] The controller 18 controls the first interface of the second electric three-way valve 12 to be closed, and the second interface of the second electric three-way valve 12 is connected to the third interface, and provides dry gas to the standard gas pipeline 24 and the gas mixing tube 3 to clean the pipeline and the gas mixing tube 3;

[0091] The controller 18 controls the electric valve 20 to open;

[0092] S5. After cleaning is completed, the controller 18 controls the electric valve 20 to close;

[0093] Turn off the control switch 17 and disconnect the power cord from the power interface 16.

[0094] Dry air can be introduced into the position of the second electric three-way valve 12. When the pipeline needs to be cleaned, the dry air will discharge the standard gas in the standard gas pipeline 24 to prevent the standard gas from remaining in the standard gas pipeline 24 and affecting the next gas preparation.

[0095] The utility model's multi-channel pollutant gas distribution instrument can flexibly adjust parameters such as pollutant concentration, type, flow rate, and humidity according to the pollutant concentration requirements of the test, and can achieve continuous and stable output of single or multiple pollutants. The multi-channel pollutant gas distribution instrument is small in size and compact in structure, making full use of the internal space. The connection structure of the pipeline is reasonably set within a limited space, making it easy to carry. The research and development and application of this technology will help promote scientific and technological innovation and product improvement in the field of environmental protection, enhance the performance and efficiency of air purification materials, and make positive contributions to improving the air quality of people's living and working environments.

[0096] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multi-channel pollutant gas distribution instrument, characterized in that: include: Housing (1); An external connection joint (2) is provided on a side plate of the housing (1) and is used for connecting to a gas collecting device to output the mixed gas; A gas mixing tube (3) is arranged inside the housing (1) and is connected to the external connection joint (2) via a pipeline; The clean dry air supply unit comprises an air inlet (4) fixedly arranged at the bottom of one side of the housing (1), an air pump (5) fixedly arranged on the bottom plate inside the housing (1), and an air purification device (6); the air inlet (4) and the air inlet of the air pump (5), and the air outlet of the air pump (5) and the input end of the air purification device (6) are connected via pipelines; the output end of the air purification device (6) is connected to the first interface of the first electric three-way valve (7) via a pipeline; A wet gas supply unit is arranged inside the housing (1), and comprises a first clean gas pipeline (8) and a humidifying tank (9); a dry gas inlet (901) is provided at the bottom end of the side wall of the humidifying tank (9); a wet gas outlet (902) is provided at the upper end of the side wall of the humidifying tank (9); a second interface of the first electric three-way valve (7) is connected to the dry gas inlet (901) via the first clean gas pipeline (8); and the wet gas outlet (902) is connected to the gas mixing pipe (3) via a wet gas pipeline (25); The standard gas supply unit comprises a plurality of standard gas input connectors (11) fixedly arranged at the bottom of one side of the housing (1) and a second electric three-way valve (12); one end of the standard gas input connector (11) is arranged outside the housing (1), and the other end of the standard gas input connector (11) is arranged inside the housing (1); each standard gas input connector (11) is connected to a first interface of the second electric three-way valve (12) via a short-circuit gas pipe (13); the second interface of the second electric three-way valve (12) is connected to one end of a standard gas pipeline (24); the other end of the standard gas pipeline (24) is connected to a gas mixing pipe (3); the second electric three-way valve (12) is close to the standard gas input connector (11); A first gas flow controller (14) is provided on the first clean gas pipeline (8), and a second gas flow controller (15) is provided on each standard gas pipeline (24); The third interface of the first electric three-way valve (7) is connected to the second clean gas pipeline (21); a diverter tee (23) is provided in the second clean gas pipeline (21) to divide one path of clean gas into multiple branches, the ends of the branches being connected to the third interface of the second electric three-way valve (12); A power interface (16) and a control switch (17) are fixedly provided on one side of the housing (1), a controller (18) is provided inside the housing (1), and a touch screen (19) is provided on one side of the housing (1); The air pump (5), the first electric three-way valve (7), the second electric three-way valve (12), the power interface (16), the control switch (17), the first gas flow controller (14) and the second gas flow controller (15) are electrically connected to the controller (18) respectively; An electric valve (20) is provided on the pipeline between the gas mixing tube (3) and the external connection joint (2), and the electric valve (20) is electrically connected to the controller (18).

2. The multi-channel pollutant gas distribution instrument according to claim 1, characterized in that: A third gas flow controller (22) is provided on the second clean gas pipeline (21), and the third gas flow controller (22) is electrically connected to the controller (18).

3. The multi-channel pollutant gas distribution instrument according to claim 1, characterized in that: Standard gas connection joints (301) are provided at equal intervals along the circumference of the side wall end of the gas mixing tube (3); the second interface of the second electric three-way valve (12) and the standard gas connection joints (301) are connected via a standard gas pipeline (24); A wet gas connection joint (302) is provided on the end plane of the gas mixing tube (3) near the standard gas connection joint (301), and a wet gas pipeline (25) is connected between the wet gas outlet (902) and the wet gas connection joint (302) of the gas mixing tube (3); A mixed gas output joint (303) is provided on the end plane of the gas mixing tube (3) away from the standard gas connection joint (301), and the mixed gas output joint (303) and the external connection joint (2) are connected via a pipeline.

4. The multi-channel pollutant gas distribution instrument according to claim 1, characterized in that: The air purification device (6) comprises a color-changing silicone tube (601) and an activated carbon tube (602); the output end of the color-changing silicone tube (601) and the input end of the activated carbon tube (602) are connected via a pipeline; the air outlet of the air pump (5) and the input end of the color-changing silicone tube (601) are connected via a pipeline; and the output end of the activated carbon tube (602) is connected to the first interface of the first electric three-way valve (7) via a pipeline.

5. The multi-channel pollutant gas distribution instrument according to claim 4, characterized in that: It also includes a mounting bracket (26) for fixing the gas mixing tube (3), the color-changing silicone tube (601) and the activated carbon tube (602); The mounting bracket (26) includes two transverse plates (2601) spaced apart from each other, the two ends of the transverse plate (2601) being fixed to the inner surfaces of the two opposite side plates of the housing (1) by screws, and two longitudinal plates (2602) being spaced apart vertically in the middle of the transverse plate (2601), the color-changing silicone tube (601) and the activated carbon tube (602) being on one side of the longitudinal plate (2602), and the gas mixing tube (3) being on the other side of the longitudinal plate (2602), and the gas mixing tube (3), the color-changing silicone tube (601) and the activated carbon tube (602) being staggeredly installed; The gas mixing tube (3), the color-changing silicone tube (601) and the activated carbon tube (602) are respectively fixed to the longitudinal plate (2602) via C-shaped buckles (2603).

6. The multi-channel pollutant gas distribution instrument according to claim 1, characterized in that: It also includes a support rod (27), the bottom of the support rod (27) is fixedly arranged on the upper surface of the bottom plate of the shell (1), and the top of the support rod (27) is connected to the bottom of the humidifying tank (9).

7. The multi-channel pollutant gas distribution instrument according to claim 1, characterized in that: A plurality of axially spaced spoilers (28) are provided in the gas mixing tube (3).

8. The multi-channel pollutant gas distribution instrument according to claim 1, characterized in that: The gas mixing tube (3) is divided into three sections along the axial direction, namely a gas input section (304), a gas mixing section (305) and a gas output section (306), and the three sections are connected by threads; Fans (29) are tightly fitted inside the two ends of the gas mixing section (305).

9. The multi-channel pollutant gas distribution instrument according to claim 1, characterized in that: A sealing top cover (10) is provided on the top of the humidifying tank (9), and the sealing top cover (10) is located on the top plate of the housing (1).

10. The multi-channel pollutant gas distribution instrument according to claim 9, characterized in that: A water level sensor (30) is provided in the humidifying tank (9), and the water level sensor (30) is electrically connected to the controller (18).

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