KRW silanization heating type ambient air sampling header pipe

Abstract

The invention discloses a KRW silanization heating type ambient air sampling header pipe, and belongs to the technical field of ambient air monitoring, the KRW silanization heating type ambient air sampling header pipe comprises an upper pipe, a lower pipe (heating section), an intelligent temperature controller and a fixing frame, and the sampling flow, the sampling fan power, the sampling pipe heating power and the temperature and humidity in the sampling pipe can be monitored in real time. And the inner walls of the upper pipe and the lower pipe are subjected to silanization treatment, the requirement for monitoring volatile organic compounds in newly added monitoring items is met, and a plurality of gas sampling and pushing mechanisms are arranged in the lower pipe of the first connecting frame. By adopting the gas flow optimization mechanism and the gas sampling pushing mechanism, the gas flow disturbance is enhanced, the potential dead zone or irregular flow is broken, and the gas flow in the sampling area is always in a dynamic state, so that the gas collection comprehensiveness is improved, the data accuracy and continuity are ensured, and the problem of pipe wall condensation is fundamentally solved.

Description

Technical Field

[0001] The invention belongs to the technical field of ambient air monitoring, and in particular relates to a KRW silanized heating type ambient air sampling main pipe. Background Art

[0002] Accurate air quality monitoring is the basis for assessing air pollution levels, formulating environmental protection policies, and ensuring public health. The performance and reliability of the ambient air sampling main pipe, as a key device for collecting air samples, directly affect the accuracy of the monitoring results. The purpose of ambient air sampling is to obtain representative air samples in order to analyze the types and concentrations of pollutants. Any mistakes or contamination during the sampling process may affect the final analysis results. The air sampling main pipe needs to have a high degree of sealing, stability and pollution resistance to ensure that the capture and transportation of pollutants during the sampling process will not change.

[0003] Existing ambient air sampling main pipes are often made of stainless steel, and there are tiny defects and roughness on the surface of stainless steel, which will cause volatile organic compounds (VOCs) to be adsorbed on the pipe wall during the sampling process, especially for low-concentration VOCs, the adsorption effect is particularly obvious. Organic matter adsorbed on the stainless steel surface will cause measurement deviations in the subsequent analysis process, thereby affecting the accuracy of the sampling results. When sampling, the ambient air sampling main pipe needs to be placed indoors at one end and extended outdoors at the other end. Some measured parameters in the air, such as ozone or volatile organic compounds, are easily adsorbed by the pipe wall, especially when the temperature difference between indoors and outdoors is large, condensation is prone to occur on the inner wall of the sampling pipe, resulting in inaccurate monitoring results. In addition, when the gas flows in the sampling pipe, a dead zone may be formed in the sampling pipe, that is, the airflow in certain areas is slow or stagnant, resulting in the inability to effectively collect the gas in these areas. Pollutants in the gas will accumulate on the inner wall of the sampling pipe, affecting the accuracy of subsequent sampling. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a KRW silanized heating type ambient air sampling main pipe.

[0005] The technical solution adopted to solve the above technical problems is: a KRW silanized heating type ambient air sampling main pipe, including a monitoring room and a fixed frame, the fixed frame is installed on the top of the monitoring room, a fixed tube is installed and fixed between the fixed frame and the monitoring room, and the fixed tube is located inside the monitoring room, the top and bottom of the fixed tube are respectively installed with an upper tube and a lower tube through flanges, the inner walls of the upper tube and the lower tube are silanized, and a clamping ring is arranged between the lower tube and the fixed tube, a plurality of airflow optimization mechanisms are arranged inside the upper tube, a connecting rod is fixedly connected between the plurality of airflow optimization mechanisms, a first connecting frame is rotatably arranged at the bottom end of the connecting rod located at the bottom of the upper tube, the first connecting frame is located inside the fixed tube, and the first connecting frame is fixedly connected to the inner wall of the fixed tube, and a plurality of gas sampling pushing mechanisms are arranged inside the lower tube.

[0006] Through the above technical solution, during the air sampling process, if a dead zone appears in the airflow (an area where the airflow is stagnant or flows poorly), the sampling efficiency may be reduced. The flipping and rotation of the spoiler can enhance the disturbance of the airflow, break the potential dead zone or irregular flow, and ensure that the airflow in the sampling area is always in a dynamic state, thereby improving the comprehensiveness of gas collection.

[0007] Furthermore, the airflow optimization mechanism includes a circular tube frame, wedge-shaped grooves are opened on both sides of the circular tube frame, and the wedge-shaped grooves are arranged in a triangular structure, a wedge-shaped plate is arranged at the bottom of the wedge-shaped groove, and the wedge plate is arranged in an arc-shaped triangular structure, a fixed plate is fixedly connected to one side of the wedge plate, and the other end of the fixed plate is fixedly connected to the circular tube frame, a tripod is rotatably connected at the center of the top of the circular tube frame, and the other end of the tripod is fixedly connected to a circular ring plate.

[0008] Through the above technical solution, the uniformity and disturbance effect of the airflow can help different gas components to mix better in the air. By flipping the spoiler, it can ensure that different gases (such as pollutants, chemicals) are mixed evenly, thereby improving the representativeness of the sampling and reducing the impact of local concentration differences on the results.

[0009] Furthermore, a plurality of arc plates are provided at the bottom of the circular tube rack, and the plurality of arc plates are symmetrically distributed in a circle, the arc plate and the circular ring plate are located in the same horizontal plane, two sliding rods are fixedly connected to the side of the arc plate facing the wedge plate, and the two sliding rods are slidably connected to the bottom end surface of the circular tube rack, a plurality of spoilers are provided on the side of the circular ring plate away from the arc plate, and the plurality of spoilers are symmetrically distributed in a circle, the spoiler connecting shaft is rotatably connected with the circular ring plate, and the through end of the spoiler connecting shaft is fixedly connected to the arc plate.

[0010] Through the above technical solution, the rotation and flipping of the spoiler not only helps to optimize the airflow, but also enhances the gas stirring effect and improves the gas exchange and collection efficiency during the sampling process, which enables the sampling system to capture the target gas more efficiently and improve work efficiency.

[0011] Furthermore, a first impeller is arranged inside the circular tube frame, and the blades in the first impeller are arranged at an angle, the first impeller connecting shaft is rotatably connected to the circular tube frame, and the through end of the first impeller connecting shaft is fixedly connected to the tripod, the through end of the first impeller connecting shaft is fixedly connected to the connecting rod, and the top ends of the connecting rods between the plurality of airflow optimization mechanisms are respectively fixedly connected to the bottom ends of the first impeller.

[0012] Through the above technical solution, there is no need for complex transmission devices such as motors, gears or belts, which reduces the number of mechanical parts and makes the system design simpler. Without these mechanical components, the system becomes more durable, reduces the failure rate, and reduces maintenance costs and complexity.

[0013] Furthermore, a plurality of sampling ports are welded through one side of the lower tube, and a plurality of the gas sampling and pushing mechanisms are located in the same straight line as the sampling ports. A temperature controller is installed on one side of the bottom of the lower tube, and the temperature controller is located at the bottom of the sampling ports. The bottom end of the lower tube is arranged in a cross-shaped structure.

[0014] Through the above technical solution, the temperature controller can provide lower tube heating power and temperature control, powered by 24V safe DC voltage, and the control temperature is adjustable between 30℃-50℃. The output voltage and current indications on the temperature controller panel can directly determine the heating condition of the sampling tube, and remote temperature setting can be implemented.

[0015] Furthermore, the gas sampling and pushing mechanism includes a second impeller, the blades in the second impeller are arranged vertically to the lower tube, the second impeller is rotatably connected to a connecting plate at an eccentric position, the top of the connecting plate is fixedly connected to a second connecting frame, and the second connecting frame is fixedly connected to the inner wall of the lower tube.

[0016] Through the above technical solution, the fan can continuously provide a stable airflow to ensure the uniformity of the flow rate during the gas sampling process. The airflow formed by the operation of the fan directly drives the impeller and the push plate to reciprocate. Compared with the traditional electric pump system, it usually has lower energy consumption. When the fan is working, it only needs to maintain a certain wind speed to continuously provide the required airflow. The overall energy efficiency of the system is higher, which reduces energy consumption.

[0017] Furthermore, the second impeller is rotatably connected to a rotating plate on both sides, the other end of the rotating plate is rotatably connected to a through pipe, the through pipe is arranged in a T-shaped structure, the other end of the through pipe is located inside the sampling port, and the through pipe is slidably connected to the inner wall of the sampling port, the other end of the through pipe is hinged with a plurality of fan plates through a torsion spring, and the plurality of fan plates are arranged in a circular symmetrical manner, and the rotation direction of the fan plates is opposite to the second impeller.

[0018] Through the above technical solution, a continuous airflow can be stably generated, so that the flow of gas from the sampling port to the monitoring instrument remains stable. This design can effectively avoid interference from the external environment on the sampling airflow (such as wind speed changes, etc.) and ensure stable gas transmission.

[0019] Furthermore, a water and dust transparent cup is installed at the bottom end of the lower tube, and an air outlet stop valve is installed on one side of the bottom of the lower tube, a draft fan is installed at the other end of the air outlet stop valve, and the draft fan is fixed to the monitoring room, a thermometer and hygrometer is installed on the side of the bottom of the lower tube away from the air outlet stop valve, an air inlet stop valve is installed on the top of the upper tube, and a rain cap is installed on the top of the air inlet stop valve.

[0020] Through the above technical scheme, the rain cap has the functions of preventing rain, snow and dust, so that larger particles of dust and rain and snow water will not fall directly into the main pipe, and the air inlet stop valve and the air outlet stop valve can be used to directly inject the standard gas generated by the calibrator into the sampling main pipe during instrument calibration, and then the standard gas is drawn out from the sampling main pipe by the sampling branch pipe and transferred to the instrument for calibration. The induced draft fan is connected to the flow limiting control through the hose to stabilize the gas laminar flow in the pipe.

[0021] The beneficial effects of the present invention are as follows: (1) The present invention heats the lower tube through a temperature controller, and its unique heating function fundamentally solves the "condensation" problem in ambient air monitoring. The air inlet and air outlet of the sampling tube adopt stop valves (optional), which solves the problem that the standard gas generated by the calibrator in ambient air monitoring is directly injected into the sampling main pipe, and then drawn out from the sampling main pipe through the sampling branch pipe and transferred to the instrument for calibration. The sampling tube is a complete sampling system, which does not require the user to use other equipment for this purpose, and is quick and convenient to install and disassemble, light in weight, and low in power consumption. It can meet the automatic monitoring and sampling of ambient air in different spaces and rooms of monitoring booths and brick-concrete houses across the country.

[0022] (2) The present invention adopts an airflow optimization mechanism. When air flows in the upper tube, it drives the first impeller to rotate, driving the tripod to rotate, so that the arc plate and the spoiler simultaneously rotate in a circle with the first impeller as the origin, prompting a sliding rod to enter the wedge-shaped groove. After sliding into the top of the wedge-shaped groove, the arc plate is caused to flip, and the spoiler is flipped when rotating, breaking the stable state of the airflow, optimizing the distribution of the airflow, and avoiding the airflow from being concentrated in a certain area. The flipping movement of the spoiler helps to enhance the mixing effect of the airflow, thereby making the gas more evenly distributed in the sampling tube and improving the representativeness and accuracy of the sampling.

[0023] (3) The present invention adopts a gas sampling and pushing mechanism. When the airflow enters the lower tube, it drives the second impeller to rotate. Due to the rotational connection between the connecting plate and the second impeller at the eccentric part, when the second impeller rotates, it moves up and down in a circular motion, prompting the rotating plate to move left and right while following the second impeller up and down, prompting the fan plate to move left and right while opening and closing, thereby pushing the gas cylinder into the monitoring instrument. The mechanical movement of the second impeller and the through tube can effectively promote the gas flow, reducing the problems caused by gas stagnation or slow flow. The system can transmit the gas from the sampling port to the monitoring equipment in a relatively short time, thereby improving the sampling efficiency.

[0024] (4) The present invention performs silanization treatment on the inner walls of the upper and lower tubes to convert the inner surface of the tube into a relatively inert, non-polar surface. By reacting silane molecules with the hydroxyl groups on the inner wall of the tube to form a silanized film, the adsorption of VOCs (especially polar and low molecular weight organic matter) on the tube wall during the sampling process can be effectively reduced. In addition, the silanization treatment not only reduces the adsorption of VOCs, but also reduces the sampling error caused by the adsorption effect. This makes the collected air samples more realistically reflect the concentration of VOCs in the air and improves the accuracy and sensitivity of monitoring. For low-concentration VOCs, especially for trace analysis, the silanization treatment can effectively avoid measurement deviations caused by surface adsorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the connection between the upper tube and the lower tube of the present invention; Figure 2 It is a schematic diagram of the planar structure of the present invention; Figure 3 It is a schematic diagram of the internal structure of the upper tube and the fixed tube of the present invention; Figure 4 It is a schematic diagram of the internal structure of the upper tube of the present invention; Figure 5 It is a schematic diagram of the local structure of the connection between the lower tube and the sampling port of the present invention; Figure 6It is a schematic structural diagram of the airflow optimization mechanism of the present invention from a first viewing angle; Figure 7 is a schematic structural diagram of the airflow optimization mechanism of the present invention from a second viewing angle; Figure 8 is a schematic structural diagram of the airflow optimization mechanism of the present invention from a third viewing angle; Fig. 9 This is a schematic diagram of the structure of the gas sampling and pushing mechanism of the present invention from a first perspective; Fig.10 It is a schematic structural diagram of the gas sampling and pushing mechanism of the present invention from a second viewing angle.

[0026] Figure numerals: 1. monitoring room; 2. fixing frame; 3. fixing pipe; 4. upper pipe; 5. sampling port; 6. clamping ring; 7. air inlet stop valve; 8. rain cap; 9. air outlet stop valve; 10. temperature controller; 11. induced draft fan; 12. lower pipe; 13. thermometer and hygrometer; 14. water and dust transparent cup; 15. air flow optimization mechanism; 16. connecting rod; 17. first connecting frame; 18. circular tube frame; 19. wedge-shaped groove; 20. fixing plate; 21. wedge-shaped plate; 22. tripod; 23. circular ring plate; 24. spoiler; 25. arc plate; 26. sliding rod; 27. first impeller; 28. gas sampling and pushing mechanism; 29. ​​second connecting frame; 30. connecting plate; 31. second impeller; 32. rotating plate; 33. through pipe; 34. fan plate. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] like Figure 1-Figure 2The present embodiment shows a KRW silanized heated ambient air sampling main pipe, comprising a monitoring room 1 and a fixing frame 2, the fixing frame 2 is installed on the top of the monitoring room 1, a fixing pipe 3 is fixed between the fixing frame 2 and the monitoring room 1, the fixing frame 2 and the fixing pipe 3 are fixed on the roof of the monitoring room, the inner and outer flanges of the fixing pipe 3 are used to make the installation and disassembly of the sampling main pipe very convenient and firm, a plurality of sampling ports 5 are welded through one side of the lower pipe 12, the sampling ports 5 are connected to the instrument with a conduit, and the redundant sampling ports 5 should be blocked, and the monitoring instrument can be started to work after the sampling tube works normally for five minutes, a plurality of gas sampling pushing mechanisms 28 are located in the same straight line as the sampling ports 5, a temperature controller 10 is installed on one side of the bottom of the lower pipe 12, the temperature controller 10 is connected to the power cord on the heated sampling tube, the cable plug of the heating tube is inserted into the socket behind the temperature controller and tightened Yes, the temperature controller 10 is located at the bottom of the sampling port 5, and a water and dust transparent cup 14 is installed at the bottom of the lower tube 12. The water and dust transparent cup 14 can directly observe the situation in the tube under special harsh environments, and an air outlet stop valve 9 is installed on one side of the bottom of the lower tube 12, and an induced draft fan 11 is installed at the other end of the air outlet stop valve 9. Under the action of the thermometer and hygrometer 13 and the temperature controller 10, the sampling flow, sampling fan power, sampling tube heating power and temperature and humidity in the sampling tube can be monitored in real time. Select a suitable position in the monitoring room 1 to open a hole larger than 80mm, install the fixing frame 2 on the top of the monitoring room 1, and keep the fixing tube 3 in a good vertical state so that it is connected and fixed with the fixing frame 2. The induced draft fan 11 is installed and fixed to the monitoring room 1, and a fan hole is opened on the side wall of the monitoring room 1 with a diameter of about 110mm. The fixing hole and the fan hole should be on the same vertical plane, and the horizontal distance between them should not exceed 0.5m is appropriate, a thermometer and hygrometer 13 is installed on the side away from the air outlet stop valve 9 at the bottom of the lower tube 12, an air inlet stop valve 7 is installed on the top of the upper tube 4, a rain cap 8 and an air inlet stop valve 7 (optional) are fixed on the top of the sampling tube, and after the sampling tube is installed, it should have a good verticality, a rain cap 8 is installed on the top of the air inlet stop valve 7, the bottom of the lower tube 12 is arranged in a cross-shaped structure, and the fixed tube 3 is located inside the monitoring room 1, and the overall electronic components in the monitoring room 1 can be remotely connected and controlled through the existing control system, the sampling tube is a split structure, which can be conveniently cleaned regularly, and must be cleaned before the first installation. Before cleaning and disassembly, the heating power supply and the power supply of the induced draft fan 11 must be turned off, the sampling catheter must be unplugged, the clamp ring 6 must be loosened to remove the lower tube 12, and then the living flange must be loosened to take out the upper tube 4 and the lower tube 12. If the sampling tube is relatively clean, the upper tube 4 and the lower tube 12 can be left unchecked for cleaning, and a small amount of relevant washing liquid can be used with a brush or silk cloth to repeatedly scrub, and care must be taken at this time to avoid splashing the washing liquid onto the equipment below, and at the same time Clean the sampling port 5. Note: It is not allowed to rinse with a large amount of washing liquid during cleaning. After cleaning and drying, the sampling tube can be installed and fixed according to the above installation method. The upper tube 4 and the lower tube 12 are installed on the top and bottom of the fixed tube 3 through flanges respectively. The inner walls of the upper tube 4 and the lower tube 12 are silanized to meet the requirements of the newly added monitoring project of volatile organic compounds. In addition, the inner flange cap and the internal rubber gasket are put on the upper tube 4 (pay attention to the direction), and then the upper tube 4 passes through the fixed tube 3 from the room to keep the upper tube opening as close as possible. 1.5m from the roof foundation, after determining the height of the upper tube 4 and the lower tube 12, put the rubber pads in the inner and outer flanges and tighten the flange caps to prevent water leakage. A clamp ring 6 is set between the lower tube 12 and the fixed tube 3. The upper plane of the lower tube 12 is aligned with the lower plane of the upper tube 4. The sealing gasket is embedded between the gasket grooves of the two tubes. Put on the clamp ring 6 and tighten the screws (Note: the end with the power cord faces downward). The installed sampling main pipe can be tested for induced draft and heating first. The heating system uses a safe voltage of 36 volts. Under normal circumstances, the induced draft fan 11 should be connected first, and then the heating system. .

[0029] like Figure 2-Figure 8As shown, a plurality of airflow optimization mechanisms 15 are arranged inside the upper tube 4, and the airflow optimization mechanisms 15 include a circular tube frame 18, a plurality of arc plates 25 are arranged at the bottom of the circular tube frame 18, and the plurality of arc plates 25 are arranged in a symmetrical distribution in a circle, and the arc plates 25 and the circular ring plates 23 are located in the same horizontal plane, and the arc plates 25 are fixedly connected to the side of the wedge plate 21, and the two slide bars 26 are slidably connected to the bottom surface of the circular tube frame 18, and the circular ring plate 23 is provided with a plurality of spoilers 24 on the side away from the arc plates 25, and the plurality of spoilers 24 are arranged in a symmetrical distribution in a circle. During the air sampling process, if a dead zone (an area where the airflow is stagnant or the flow is not smooth) appears in the airflow, the sampling efficiency may be reduced, and the flipping and rotation of the spoiler 24 It can enhance the disturbance of airflow, break potential dead zones or irregular flows, ensure that the airflow in the sampling area is always in a dynamic state, thereby improving the comprehensiveness of gas collection. The connecting shaft of the spoiler 24 is rotatably connected to the annular plate 23, and the connecting shaft through-end of the spoiler 24 is fixedly connected to the arc plate 25. Wedge-shaped grooves 19 are opened on both sides of the circular tube frame 18. The uniformity and disturbance effect of the airflow can help different gas components to mix better in the air. By flipping the spoiler 24, it can ensure that different gases (such as pollutants, chemicals) are mixed evenly, thereby improving the representativeness of the sampling and reducing the influence of local concentration differences on the results. A first impeller 27 is arranged inside the circular tube frame 18, and the blades in the first impeller 27 are inclined. The first impeller 27 connecting shaft is rotatably connected to the circular tube frame 18, and the first impeller 27 connecting shaft through-end is fixedly connected to the tripod 22, and the first impeller 27 connecting shaft through-end is fixedly connected to the connecting rod 16, and the top ends of the connecting rods 16 between the plurality of airflow optimization mechanisms 15 are respectively fixedly connected to the bottom ends of the first impeller 27, and the wedge-shaped groove 19 is arranged in a triangular structure, and a wedge-shaped plate 21 is arranged at the bottom of the wedge-shaped groove 19, and the wedge-shaped plate 21 is arranged in an arc-shaped triangular structure, and a fixed plate 20 is fixedly connected to one side of the wedge plate 21. The rotation and flipping of the spoiler 24 not only helps to optimize the airflow, but also enhances the stirring effect of the gas, thereby improving the gas exchange and collection efficiency during the sampling process, which can make the sampling system more In order to more efficiently capture the target gas and improve work efficiency, the other end of the fixed plate 20 is fixedly connected to the circular tube frame 18, and a tripod 22 is rotatably connected at the top center of the circular tube frame 18. The other end of the tripod 22 is fixedly connected to a circular ring plate 23. A plurality of airflow optimization mechanisms 15 are fixedly connected with connecting rods 16 in pairs, and a first connecting frame 17 is rotatably provided at the bottom end of the connecting rod 16 located at the bottom of the upper tube 4, so that a continuous airflow can be stably generated, so that the flow of gas from the sampling port 5 to the monitoring instrument remains stable. This design can effectively avoid interference with the sampling airflow caused by the external environment (such as changes in wind speed, etc.) to ensure stable gas transmission. The first connecting frame 17 is located inside the fixed tube 3, and the first connecting frame 17 is fixedly connected to the inner wall of the fixed tube 3.

[0030] like Figure 1-Figure 10As shown, a plurality of gas sampling and pushing mechanisms 28 are arranged inside the lower tube 12, and the gas sampling and pushing mechanisms 28 include a second impeller 31, and the blades in the second impeller 31 are arranged vertically to the lower tube 12. The second impeller 31 is rotatably connected to rotating plates 32 on both sides, and the other end of the rotating plate 32 is rotatably connected to a through pipe 33, and the through pipe 33 is arranged in a T-shaped structure, and the other end of the through pipe 33 is located inside the sampling port 5. The fan can continuously provide a stable airflow to ensure the uniformity of the flow rate during the gas sampling process, and the airflow formed by the operation of the fan directly drives the impeller and the push plate to reciprocate. Compared with the traditional electric pump system, the energy consumption is usually lower. When the fan is working, it only needs to maintain a certain wind speed to continuously provide the required airflow. The overall energy efficiency is higher, and energy consumption is reduced. The through pipe 33 is slidably connected to the inner wall of the sampling port 5. The other end of the through pipe 33 is hinged with a plurality of fan plates 34 through a torsion spring, and the plurality of fan plates 34 are arranged in a circular symmetrical manner. The fan plates 34 rotate in the opposite direction of the second impeller 31. The second impeller 31 is rotatably connected to a connecting plate 30 at an eccentric position. A second connecting frame 29 is fixedly connected to the top of the connecting plate 30. The second connecting frame 29 is fixedly connected to the inner wall of the lower tube 12. No complex transmission devices such as motors, gears or belts are required, and the number of mechanical components is reduced, making the system design simpler. Without these mechanical components, the system becomes more durable, reduces the failure rate, and reduces maintenance costs and complexity.

[0031] The working principle of this embodiment is as follows, and the installation steps are: 1. Select a suitable position in the monitoring room 1 to open a hole larger than 80mm to form a fixing hole, install the fixing frame 2 on the top of the monitoring room 1, and keep the fixing pipe 3 in a good vertical state, and place the fixing pipe 3 in the fixing hole to connect and fix it with the fixing frame 2. At the same time, open a fan hole on the side wall of the monitoring room 1 with a diameter of about 110mm. The fixing hole and the fan hole should be on the same vertical plane, and the horizontal distance between them should not exceed 0.5m.

[0032] 2. Put the inner flange cap and internal rubber gasket on the upper tube 4 (pay attention to the direction), and then pass the upper tube 4 through the fixing tube 3 from the inside of the house, and try to keep the upper tube mouth 1.5m away from the roof foundation surface. Fixing method: After determining the height of the upper tube 4 and the lower tube 12, put the internal and external flanges and internal rubber gaskets and tighten the flange cap to prevent water leakage.

[0033] 3. Connect the lower tube 12, align the upper plane of the lower tube 12 with the lower plane of the upper tube 4, insert the sealing gasket between the gasket grooves of the two tubes, buckle the clamping ring 6 and tighten the screws (Note: the end with the power cord faces downward).

[0034] 4. Fix the induced draft fan 11 at the fan hole on one side of the monitoring room 1, connect the induced draft fan 11 and the sampling tube with a plastic tube, and tighten the plastic tube with a screw clip.

[0035] 5. Fix the rain cap 8 and the air inlet stop valve 7 (optional) on the top of the sampling tube. After the sampling tube is installed, it should have good verticality.

[0036] 6. Connect the temperature controller 10 to the heated lower tube 12, and insert the cable plug of the heating tube into the socket behind the temperature controller 10 and tighten it.

[0037] Instructions for use: Before using the sampling main pipe, (1) first conduct an induced draft and heating test on the installed sampling main pipe. The heating system uses a 36-volt safety voltage. Under normal circumstances, the induced draft fan 11 should be connected first, followed by the heating system.

[0038] Use a catheter to connect the sampling port 5 to the instrument. The redundant sampling ports 5 should be blocked. After the sampling tube has been working normally for five minutes, the monitoring instrument can be started to work.

[0039] When the sampling main pipe is working, the induced draft fan 11 operates to suck air into the rain cap 8, and then enters the air inlet stop valve 7, the upper pipe 4 and the lower pipe 12, and then passes through the air outlet stop valve 9 and is discharged from the fan hole on one side of the induced draft fan 11, thereby prompting air to continuously enter the sampling main pipe to form air flow.

[0040] When the air flows in the upper tube 4, when passing through the first impeller 27, it pushes the inclined blades of the first impeller 27, so that the first impeller 27 rotates, driving the tripod 22 to rotate, and the annular plate 23 rotates synchronously. When the annular plate 23 rotates, the arc plate 25 and the spoiler 24 simultaneously rotate in a circle with the first impeller 27 as the origin. When the sliding rod 26 on one side of the arc plate 25 slides along the bottom of the circular tube frame 18, one sliding rod 26 enters the wedge-shaped groove 19, and after sliding into the top of the wedge-shaped groove 19, the arc plate 25 is turned over, and the other sliding rod 26 is turned over. A sliding rod 26 follows and flips synchronously, and after contacting the bottom of the circular tube rack 18, it continues to perform circular motion with the first impeller 27 as the origin, so that the spoilers 24 at the wedge plates 21 on both sides of the circular tube rack 18 are flipped when the spoilers 24 perform circular motion, thereby enhancing the disturbance of the airflow, breaking the potential dead zone or irregular flow, and ensuring that the airflow in the sampling area is always in a dynamic state, thereby improving the comprehensiveness of gas collection. When the first impeller 27 rotates, under the action of the connecting rod 16, several airflow optimization mechanisms 15 operate simultaneously.

[0041] When the disturbed airflow enters the lower tube 12, it drives the second impeller 31 to rotate. Due to the connection between the connecting plate 30 and the second impeller 31 at the eccentric part, when the second impeller 31 rotates, it moves up and down in a circular motion, prompting the rotating plate 32 to move left and right while following the second impeller 31 up and down, thereby driving the through pipe 33 to move left and right in the sampling port 5. The second impeller 31 rotates to push the disturbed air into the through pipe 33. When the through pipe 33 moves to the left, the disturbed air enters the through pipe 33. The fan plate 34 is pushed to flip open, and the disturbed air enters near the monitoring instrument. When the through pipe 33 moves to the right, the fan plate 34 is closed under the action of the torsion spring, and the disturbed air is pushed into the monitoring instrument for monitoring. Repeating the above operation steps can continuously and stably push the gas from the sampling port 5 to the monitoring instrument, and can avoid distortion of measurement data caused by stagnation or uneven flow of gas components near the sampling port 5, thereby ensuring the representativeness and accuracy of the sampling.

[0042] Maintenance and cleaning: Maintenance and cleaning: 1. The sampling tube is a split structure, which can be easily cleaned regularly. It must be cleaned before the first installation.

[0043] Before cleaning and disassembly, the heating power supply and the power supply of the induced draft fan 11 must be turned off, the sampling conduit must be unplugged, the clamp ring 6 must be loosened to remove the lower sampling tube, and then the living flange must be loosened to remove the upper tube.

[0044] If the sampling tube is relatively clean, the upper tube can be left un-removed for cleaning. Use a brush or silk cloth to dip a small amount of the relevant cleaning liquid and scrub it repeatedly. Be careful at this time to avoid splashing the cleaning liquid onto the equipment below. Clean the sampling port 5 at the same time. Note: It is not allowed to rinse with a large amount of cleaning liquid during cleaning! 4. After cleaning and drying, install the sampling tube according to the installation method described above.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A KRW silanized heated ambient air sampling main pipe, comprising a monitoring room (1) and a fixing frame (2), characterized in that: The fixing frame (2) is installed on the top of the monitoring room (1); a fixing pipe (3) is fixedly installed between the fixing frame (2) and the monitoring room (1), and the fixing pipe (3) is located inside the monitoring room (1); an upper pipe (4) and a lower pipe (12) are respectively installed on the top and bottom of the fixing pipe (3) through flanges; the inner walls of the upper pipe (4) and the lower pipe (12) are silanized, and a clamping ring (6) is provided between the lower pipe (12) and the fixing pipe (3); a plurality of airflow optimization mechanisms (15) are provided inside the upper pipe (4); a connecting rod (16) is fixedly connected between the plurality of airflow optimization mechanisms (15); a first connecting frame (17) is rotatably provided at the bottom end of the connecting rod (16) located at the bottom of the upper pipe (4); the first connecting frame (17) is located inside the fixing pipe (3), and the first connecting frame (17) is fixedly connected to the inner wall of the fixing pipe (3); and a plurality of gas sampling pushing mechanisms (28) are provided inside the lower pipe (12).

2. A KRW silanized heated ambient air sampling main pipe according to claim 1, characterized in that: The airflow optimization mechanism (15) comprises a circular tube frame (18), wedge-shaped grooves (19) are provided on both sides of the circular tube frame (18), and the wedge-shaped grooves (19) are arranged in a triangular structure. A wedge-shaped plate (21) is arranged at the bottom of the wedge-shaped groove (19), and the wedge-shaped plate (21) is arranged in an arc-shaped triangular structure. A fixing plate (20) is fixedly connected to one side of the wedge plate (21), and the other end of the fixing plate (20) is fixedly connected to the circular tube frame (18). A tripod (22) is rotatably connected to the center of the top of the circular tube frame (18), and the other end of the tripod (22) is fixedly connected to a circular ring plate (23).

3. A KRW silanized heated ambient air sampling manifold according to claim 2, characterized in that: A plurality of arc plates (25) are arranged at the bottom of the circular tube frame (18), and the plurality of arc plates (25) are arranged in a circumferentially symmetrical distribution. The arc plates (25) and the circular ring plate (23) are located on the same horizontal plane. Two sliding rods (26) are fixedly connected to the side of the arc plate (25) facing the wedge plate (21), and the two sliding rods (26) are slidably connected to the bottom surface of the circular tube frame (18). A plurality of spoilers (24) are arranged on the side of the circular ring plate (23) away from the arc plates (25), and the plurality of spoilers (24) are arranged in a circumferentially symmetrical distribution. The connecting shaft of the spoiler (24) is rotatably connected to the circular ring plate (23), and the connecting shaft of the spoiler (24) is fixedly connected to the arc plate (25) at the through end.

4. A KRW silanized heated ambient air sampling manifold according to claim 2, characterized in that: A first impeller (27) is arranged inside the circular tube frame (18), and the blades inside the first impeller (27) are arranged obliquely. The connecting shaft of the first impeller (27) is rotatably connected to the circular tube frame (18), and the through-end of the connecting shaft of the first impeller (27) is fixedly connected to the tripod (22). The through-end of the connecting shaft of the first impeller (27) is fixedly connected to the connecting rod (16), and the top ends of the connecting rods (16) between the plurality of airflow optimization mechanisms (15) are respectively fixedly connected to the bottom ends of the first impeller (27).

5. The KRW silanized heated ambient air sampling manifold according to claim 1, characterized in that: A plurality of sampling ports (5) are welded through one side of the lower tube (12), and a plurality of the gas sampling and pushing mechanisms (28) are located in the same straight line as the sampling ports (5). A temperature controller (10) is installed on one side of the bottom of the lower tube (12), and the temperature controller (10) is located at the bottom of the sampling ports (5). The bottom end of the lower tube (12) is arranged in a cross-shaped structure.

6. A KRW silanized heated ambient air sampling manifold according to claim 5, characterized in that: The gas sampling and pushing mechanism (28) comprises a second impeller (31), the blades in the second impeller (31) are arranged vertically to the lower tube (12), the second impeller (31) is rotatably connected to a connecting plate (30) at an eccentric position, the top end of the connecting plate (30) is fixedly connected to a second connecting frame (29), and the second connecting frame (29) is fixedly connected to the inner wall of the lower tube (12).

7. A KRW silanized heated ambient air sampling manifold according to claim 6, characterized in that: The second impeller (31) has rotating plates (32) rotatably connected on both sides, and the other end of the rotating plate (32) is rotatably connected to a through pipe (33), the through pipe (33) is arranged in a T-shaped structure, the other end of the through pipe (33) is located inside the sampling port (5), and the through pipe (33) is slidably connected to the inner wall of the sampling port (5), and the other end of the through pipe (33) is hinged with a plurality of fan plates (34) via a torsion spring, and the plurality of fan plates (34) are arranged in a circular symmetry, and the direction of rotation of the fan plates (34) is opposite to the direction of rotation of the second impeller (31).

8. The KRW silanized heated ambient air sampling manifold according to claim 1, characterized in that: A water and dust transparent cup (14) is installed at the bottom end of the lower tube (12), and an air outlet stop valve (9) is installed on one side of the bottom of the lower tube (12). An induced draft fan (11) is installed at the other end of the air outlet stop valve (9), and the induced draft fan (11) is fixedly installed with the monitoring room (1). A thermometer and hygrometer (13) is installed at the side of the bottom of the lower tube (12) away from the air outlet stop valve (9). An air inlet stop valve (7) is installed at the top end of the upper tube (4), and a rainproof cap (8) is installed at the top end of the air inlet stop valve (7).

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