Detection probe for humidity in pipeline

Abstract

The utility model relates to the technical field of flue gas monitoring, in particular to a humidity detection probe in a pipeline, which comprises a control cabinet, a connecting rod is fixedly connected to the middle of the top end of the control cabinet, a probe body is fixedly connected to the top end of the connecting rod, and a plurality of air inlet holes are uniformly formed in the top of the outer surface of the probe body at intervals in the circumferential direction. A micro motor is fixedly arranged in the middle of the top end of the probe body, the output end of the micro motor is fixedly connected with a transmission shaft, the bottom end of the transmission shaft extends to the middle of an inner cavity of the probe body, and the outer surface of the transmission shaft is rotationally sleeved with a first filter plate and a second filter plate at intervals. A plurality of filter holes I and a plurality of filter holes II are uniformly formed in the filter plate I and the filter plate II at intervals in a penetrating manner respectively, and the diameters of the filter plate I and the filter plate II are matched with the inner diameter of the probe main body. According to the utility model, the flue gas containing dusty and sticky substances can be filtered, and the problems that the flue gas humidity probe is easy to block and difficult to maintain are solved.

Description

Technical Field

[0001] This utility model relates to the field of flue gas monitoring technology, specifically disclosing a humidity detection probe for pipelines. Background Technology

[0002] In industrial production, monitoring flue gas emissions is crucial, and flue gas humidity is one of the key parameters for assessing pollutant diffusion, corrosion risk, thermal efficiency, and compliance with environmental standards. The environment inside flue gas ducts is usually very harsh, with high humidity and often containing high concentrations of dust, acidic condensates, oil mist, and other sticky particulate matter.

[0003] Currently, most probes used for humidity detection in flue gas ducts extend directly into the duct, exposing the sensor to the gas being measured. This installation method has significant drawbacks: large amounts of dust and sticky substances in the flue gas easily adhere to and accumulate on the surface of the sensor's sensitive element or its protective cover, rapidly contaminating the sensor and causing decreased sensitivity, slow response, measurement drift, or even complete failure. Furthermore, maintenance personnel need to frequently disassemble the probe for cleaning or calibration, which is not only labor-intensive and costly but also affects the continuity of monitoring and the reliability of data. Existing probes with simple filtering devices also suffer from filters that are easily clogged and difficult to clean, failing to fundamentally solve the problem. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides a humidity detection probe for pipelines, which can adapt to the harsh environment of flue gas pipelines, has efficient self-cleaning ability, and can operate stably and reliably for a long time.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] The humidity detection probe in the pipeline includes a control cabinet. A connecting rod is fixedly connected to the middle of the top of the control cabinet. The top of the connecting rod is fixedly connected to the probe body. Several air inlets are evenly and intermittently opened along the circumferential direction on the top of the outer surface of the probe body. A micro motor is fixedly installed in the middle of the top of the probe body. A drive shaft is fixedly connected to the output end of the micro motor. The bottom end of the drive shaft extends to the middle of the inner cavity of the probe body. Filter plate 1 and filter plate 2 are rotatably sleeved on the outer surface of the drive shaft at intervals. Several filter holes 1 and several filter holes 2 are evenly and intermittently opened on filter plate 1 and filter plate 2, respectively. The diameters of filter plate 1 and filter plate 2 are adapted to the inner diameter of the probe body. Four sets of scraping plates are fixedly installed on the outer surface of the drive shaft in conjunction with filter plate 1 and filter plate 2. The two sets of scraping plates at the top are respectively attached to the top and bottom of filter plate 1, and the two sets of scraping plates at the bottom are respectively attached to the top and bottom of filter plate 2. A humidity sensor is fixedly installed at the bottom of the inner cavity of the probe body. A spiral guide vane with a spiral structure is fixedly installed at the top of the humidity sensor.

[0007] Furthermore, both filter plate one and filter plate two are fixedly connected to the inner wall of the probe body, and the diameter of filter hole one is larger than the diameter of filter hole two.

[0008] Furthermore, the bottom of the probe body is provided with an exhaust port through which the connecting rod passes, and a limit cylinder is fixedly installed at the bottom of the inner cavity of the probe body in conjunction with the exhaust port.

[0009] Furthermore, the outer wall of the humidity sensor is fixedly provided with several fixing rods, and the ends of the fixing rods away from the humidity sensor are all fixedly connected to the inner wall of the limiting cylinder. The humidity sensor is fixedly connected to the inner wall of the limiting cylinder through the fixing rods.

[0010] Furthermore, the limiting cylinder has an overall cylindrical structure, and the inner diameter of the limiting cylinder is adapted to the diameter of the exhaust port, while the outer diameter of the limiting cylinder is smaller than the inner diameter of the probe body.

[0011] Furthermore, a set of scraper blades includes four scraper blades that are evenly and spaced apart along the outer surface of the drive shaft, with the top of the spiral guide vane and the bottom of the lowest set of scraper blades spaced apart, and the bottom of the spiral guide vane extending into the limiting cylinder.

[0012] Furthermore, a number of fixing rods are fixedly installed on the outer wall of the spiral guide vane. The ends of the fixing rods away from the spiral guide vane are all fixedly connected to the inner wall of the probe body. The spiral guide vane is fixedly connected to the inner wall of the probe body through the fixing rods.

[0013] Furthermore, a connecting flange is fixedly fitted in the middle of the outer surface of the connecting rod, and a sealing gasket is provided on the side of the connecting flange near the probe body, with the sealing gasket fitted on the outer surface of the connecting rod.

[0014] Furthermore, the connecting flange and the sealing gasket are respectively provided with several bolt holes, and several fixing bolts are respectively threaded through and installed in the bolt holes.

[0015] Furthermore, the control cabinet is equipped with a temperature controller and a wireless communication module. Temperature sensors are installed inside the connecting rod and the probe body. Heating wires with a threaded structure are fixedly installed inside the tube wall of the connecting rod and the tube wall of the probe body. The heating wires are linked with the temperature sensors, the temperature sensors are linked with the temperature controller, and the humidity sensor is linked with the wireless communication module.

[0016] The beneficial effects of this utility model are:

[0017] This invention, by setting up filter plate one and filter plate two, can filter flue gas containing a lot of dust and sticky substances. Furthermore, by using a micro-motor to drive four sets of scraping plates to rotate, it continuously scrapes away dust and adhering substances attached to the upper and lower surfaces of filter plate one and filter plate two, achieving real-time self-cleaning. This solves the problems of easy clogging and difficult maintenance of flue gas humidity probes. Maintenance personnel no longer need to frequently disassemble the probe body for cleaning or calibration, significantly extending the maintenance-free period and equipment lifespan. The spiral guide vanes forcibly convert the straight airflow after filtration through filter plate one and filter plate two into a rotating spiral airflow. This allows trace impurities in the airflow to be thrown onto the inner wall of the probe body under the action of centrifugal force, performing secondary separation of extremely fine particles that might escape filtration, further purifying the gas in contact with the humidity sensor and ensuring the reliability of monitoring data. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a partial cross-sectional view of the probe body, air inlet, micro motor, drive shaft, filter plate one, filter plate two, filter hole one, filter hole two, scraper plate, exhaust port and heating wire of this utility model.

[0020] Figure 3 This is a cross-sectional view of the longitudinal section of the present invention, excluding the control cabinet, connecting rod, air inlet, connecting flange, sealing gasket, and bolt holes.

[0021] In the diagram: 1. Control cabinet; 2. Connecting rod; 3. Probe body; 4. Air inlet; 5. Micro motor; 6. Drive shaft; 7. Filter plate one; 8. Filter plate two; 9. Filter hole one; 10. Filter hole two; 11. Scraper; 12. Humidity sensor; 13. Spiral guide vane; 14. Exhaust port; 15. Limiting cylinder; 16. Fixing rod one; 17. Fixing rod two; 18. Connecting flange; 19. Sealing gasket; 20. Bolt hole; 21. Heating wire. Detailed Implementation

[0022] The present invention will now be described and explained in detail with reference to the accompanying drawings.

[0023] Example 1

[0024] like Figure 1-3As shown, the humidity detection probe in the pipeline includes a control cabinet 1. A connecting rod 2 is fixedly connected to the middle of the top of the control cabinet 1. A probe body 3 is fixedly connected to the top of the connecting rod 2. Several air inlets 4 are evenly and intermittently opened along the circumferential direction on the top of the outer surface of the probe body 3. A micro motor 5 is fixedly installed in the middle of the top of the probe body 3. A drive shaft 6 is fixedly connected to the output end of the micro motor 5. The bottom end of the drive shaft 6 extends to the middle of the inner cavity of the probe body 3. A filter plate 7 and a filter plate 8 are spaced apart and rotatably sleeved on the outer surface of the drive shaft 6. Both the filter plate 7 and the filter plate 8 are respectively equipped with... The probe body 3 has a number of filter holes 1 9 and a number of filter holes 2 10 that are evenly spaced and penetrate each other. The diameters of filter plate 1 7 and filter plate 2 8 are adapted to the inner diameter of the probe body 3. Four sets of scraping plates 11 are fixedly installed on the outer surface of the drive shaft 6 in conjunction with filter plate 1 7 and filter plate 2 8. The two sets of scraping plates 11 located at the top are respectively attached to the top and bottom of filter plate 1 7, and the two sets of scraping plates 11 located at the bottom are respectively attached to the top and bottom of filter plate 2 8. A humidity sensor 12 is fixedly installed at the bottom of the inner cavity of the probe body 3, and a spiral guide vane 13 with a spiral structure is fixedly installed at the top of the humidity sensor 12.

[0025] With the above configuration, filter plates 7 and 8 can filter flue gas containing dust and sticky substances. Furthermore, a micro motor 5 drives four sets of scraper plates 11 to rotate, continuously scraping away dust and adhering substances from the upper and lower surfaces of filter plates 7 and 8, achieving real-time self-cleaning. This solves the problems of easy clogging and difficult maintenance of the flue gas humidity sensor, eliminating the need for frequent disassembly of the sensor body 3 for cleaning or calibration, significantly extending the maintenance-free period and equipment lifespan. The spiral guide vanes 13 forcefully convert the straight airflow filtered by filter plates 7 and 8 into a rotating spiral airflow. This allows trace impurities in the airflow to be thrown onto the inner wall of the sensor body 3 under the centrifugal force of rotation, performing secondary separation of extremely fine particles that might escape filtration, further purifying the gas in contact with the humidity sensor 12 and ensuring the reliability of the monitoring data.

[0026] Both filter plate 7 and filter plate 8 are fixedly connected to the inner wall of probe body 3, and the diameter of filter hole 9 is larger than the diameter of filter hole 10.

[0027] With the above settings, the filter holes 9 can be used for primary filtration of larger particles and flocculent matter, and the filter holes 10 can be used for fine filtration of fine dust.

[0028] The bottom end of the probe body 3 is fitted with the connecting rod 2 and has an exhaust port 14. The bottom of the inner cavity of the probe body 3 is fitted with a limit cylinder 15 to fit the exhaust port 14.

[0029] A number of fixing rods 16 are fixedly installed on the outer wall of the humidity sensor 12. The ends of the fixing rods 16 away from the humidity sensor 12 are all fixedly connected to the inner wall of the limiting cylinder 15. The humidity sensor 12 is fixedly connected to the inner wall of the limiting cylinder 15 through the fixing rods 16.

[0030] The limiting cylinder 15 has an overall cylindrical structure, and the inner diameter of the limiting cylinder 15 is adapted to the diameter of the exhaust port 14. The outer diameter of the limiting cylinder 15 is smaller than the inner diameter of the probe body 3.

[0031] With the above settings, the trace impurities that are thrown off under the action of centrifugal force enter between the outer wall of the limiting cylinder 15 and the inner wall of the probe body 3, thus preventing the trace impurities from directly entering the connecting rod 2 through the exhaust port 14; and by setting the limiting cylinder 15, the gas after measurement can be guided to enter the connecting rod 2 through the exhaust port 14.

[0032] A set of scraper blades 11 includes four scraper blades 11 that are evenly and spaced apart along the outer surface of the drive shaft 6. The top end of the spiral guide vane 13 and the bottom end of the lowest set of scraper blades 11 are spaced apart. The bottom end of the spiral guide vane 13 extends into the limiting cylinder 15.

[0033] The outer wall of the spiral guide vane 13 is fixedly provided with several fixing rods 17. The ends of the fixing rods 17 away from the spiral guide vane 13 are all fixedly connected to the inner wall of the probe body 3. The spiral guide vane 13 is fixedly connected to the inner wall of the probe body 3 through the fixing rods 17.

[0034] A connecting flange 18 is fixedly sleeved in the middle of the outer surface of the connecting rod 2. A sealing gasket 19 is provided on the side of the connecting flange 18 near the probe body 3. The sealing gasket 19 is sleeved on the outer surface of the connecting rod 2.

[0035] The connecting flange 18 and the sealing gasket 19 are respectively provided with several bolt holes 20, and several fixing bolts are threaded through and installed in the bolt holes 20.

[0036] With the above setup, the connecting flange 18 and the flue gas pipe can be fixedly connected by several fixing bolts, and the sealing gasket 19 can ensure the sealing of the connection between the connecting flange 18 and the flue gas pipe.

[0037] The control cabinet 1 is equipped with a temperature controller and a wireless communication module. Temperature sensors are installed in both the connecting rod 2 and the probe body 3. Heating wires 21 with a threaded structure are fixedly installed in the tube wall of the connecting rod 2 and the tube wall of the probe body 3. The heating wires 21 are linked with the temperature sensors, the temperature sensors are linked with the temperature controller, and the humidity sensor 12 is linked with the wireless communication module.

[0038] With the above setup, the temperature sensor is embedded in the tube wall of the connecting rod 2 and the probe body 3; the heating wire 21, the temperature sensor, and the temperature controller form a closed-loop control circuit. When the temperature sensor detects that the temperature inside the connecting rod 2 and the probe body 3 is lower than the set threshold, the temperature controller automatically starts heating to ensure that the inside of the connecting rod 2 and the probe body 3 is in a suitable dry state; the data measured by the humidity sensor 12 is transmitted to the wireless communication module and then remotely sent to the monitoring center.

[0039] Working principle and process:

[0040] During installation, several fixing bolts are passed through several bolt holes 20 on the connecting flange 18 and the sealing gasket 19 to fix and seal the connecting flange 18 and the flue gas duct. Then, the probe body 3 is inserted into the flue gas duct to be tested, and several air inlets 4 are submerged in the airflow. The dynamic airflow environment outside the probe body 3 and the relative stillness inside form a small positive pressure difference, which drives the dust-laden flue gas to continuously flow into the probe body 3 from the air inlets 4. Alternatively, an air pump can be installed in the control cabinet 1, and the air pump's suction end can be connected to the connecting rod 2 for suction.

[0041] During operation, the flue gas entering the probe body 3 first undergoes coarse filtration through filter plate 7, where most of the larger particles are intercepted by several filter holes 9 and scraped away from the filter holes 9 by the rotating scraper plate 11. Then, the gas undergoes fine filtration through filter plate 8, where even finer particles are further intercepted by several filter holes 10 and scraped away from the filter holes 10 by the rotating scraper plate 11. The relatively clean gas after two stages of filtration forms a swirling flow under the guidance of the spiral guide vane 13. The trace impurities in the swirling flow are thrown onto the inner wall of the probe body 3 under the action of centrifugal force, which performs secondary separation of the extremely fine particles that may escape filtration. The airflow with trace impurities removed fully contacts the humidity sensor 12 to complete the humidity measurement. The measured gas is guided by the limiting cylinder 15 and discharged from the probe body 3 through the exhaust port 14.

[0042] Throughout the process, the micro motor 5 can work intermittently or continuously to keep the filter plate 7 and filter plate 8 clean. When the temperature sensor detects that the temperature is lower than the set threshold, the temperature controller automatically starts heating to ensure that the connecting rod 2 and the probe body 3 are in a suitable dry state and to prevent flue gas condensation. Finally, accurate and stable humidity measurement values ​​are remotely sent to the monitoring center through the wireless communication module.

Claims

1. A humidity detection probe for pipelines, comprising a control cabinet (1), characterized in that, A connecting rod (2) is fixedly connected to the middle of the top of the control cabinet (1). A probe body (3) is fixedly connected to the top of the connecting rod (2). Several air inlets (4) are evenly and intermittently opened along the top of the outer surface of the probe body (3). A micro motor (5) is fixedly installed in the middle of the top of the probe body (3). A drive shaft (6) is fixedly connected to the output end of the micro motor (5). The bottom end of the drive shaft (6) extends to the middle of the inner cavity of the probe body (3). Filter plates 1 (7) and 2 (8) are spaced and rotated on the outer surface of the drive shaft (6). Several air inlets (4) are evenly and intermittently opened on filter plates 1 (7) and 2 (8). The filter hole 1 (9) and several filter holes 2 (10) are provided. The diameters of filter plate 1 (7) and filter plate 2 (8) are adapted to the inner diameter of the probe body (3). The outer surface of the drive shaft (6) is fitted with four sets of scraping plates (11) in conjunction with filter plate 1 (7) and filter plate 2 (8). The two sets of scraping plates (11) located at the top are attached to the top and bottom of filter plate 1 (7) respectively, and the two sets of scraping plates (11) located at the bottom are attached to the top and bottom of filter plate 2 (8) respectively. A humidity sensor (12) is fixedly installed at the bottom of the inner cavity of the probe body (3). A spiral guide vane (13) with a spiral structure is fixedly installed at the top of the humidity sensor (12).

2. The humidity detection probe in the pipeline according to claim 1, characterized in that, Both filter plate one (7) and filter plate two (8) are fixedly connected to the inner wall of the probe body (3), and the diameter of filter hole one (9) is larger than the diameter of filter hole two (10).

3. The humidity detection probe in the pipeline according to claim 1, characterized in that, The bottom end of the probe body (3) is connected to the connecting rod (2) and has an exhaust port (14). The bottom of the inner cavity of the probe body (3) is fixedly provided with a limit cylinder (15) connected to the exhaust port (14).

4. The humidity detection probe in the pipeline according to claim 3, characterized in that, The outer wall of the humidity sensor (12) is fixedly provided with several fixing rods (16). The ends of the fixing rods (16) away from the humidity sensor (12) are all fixedly connected to the inner wall of the limiting cylinder (15). The humidity sensor (12) is fixedly connected to the inner wall of the limiting cylinder (15) through the fixing rods (16).

5. The humidity detection probe in the pipeline according to claim 3, characterized in that, The limiting cylinder (15) has a cylindrical structure, and the inner diameter of the limiting cylinder (15) is compatible with the diameter of the exhaust port (14). The outer diameter of the limiting cylinder (15) is smaller than the inner diameter of the probe body (3).

6. The humidity detection probe in the pipeline according to claim 3, characterized in that, A set of scraper blades (11) includes four scraper blades (11) that are evenly and spaced apart along the outer surface of the drive shaft (6), the top of the spiral guide vane (13) and the bottom of the lowest set of scraper blades (11) are spaced apart, and the bottom of the spiral guide vane (13) extends into the limiting cylinder (15).

7. The humidity detection probe in the pipeline according to claim 1, characterized in that, The outer wall of the spiral guide vane (13) is fixedly provided with several fixing rods (17). The ends of the fixing rods (17) away from the spiral guide vane (13) are all fixedly connected to the inner wall of the probe body (3). The spiral guide vane (13) is fixedly connected to the inner wall of the probe body (3) through several fixing rods (17).

8. The humidity detection probe in the pipeline according to claim 1, characterized in that, A connecting flange (18) is fixedly sleeved in the middle of the outer surface of the connecting rod (2). A sealing gasket (19) is provided on the side of the connecting flange (18) near the probe body (3). The sealing gasket (19) is sleeved on the outer surface of the connecting rod (2).

9. The humidity detection probe in a pipeline according to claim 8, characterized in that, The connecting flange (18) and the sealing gasket (19) are respectively provided with several bolt holes (20), and several fixing bolts are respectively threaded through the bolt holes (20).

10. The humidity detection probe in a pipeline according to claim 1, characterized in that, The control cabinet (1) is equipped with a temperature controller and a wireless communication module. Temperature sensors are installed in both the connecting rod (2) and the probe body (3). Heating wires (21) with a threaded structure are fixedly installed in the tube wall of the connecting rod (2) and the tube wall of the probe body (3). The heating wires (21) are linked with the temperature sensor, the temperature sensor is linked with the temperature controller, and the humidity sensor (12) is linked with the wireless communication module.

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