A gas detector with self-cleaning function

Abstract

The utility model discloses a kind of gas detector with self-cleaning function, it includes main casing, air inlet, exhaust port, detection chamber, sensor component, drive module and cleaning component.Sensor component is equipped with ring air flow passage formed by flow guide hood, cleaning component is contacted with sensor probe by flexible brush ring and removes pollutant, dust collection box collects and filters exhaust gas.Purify gas in multiple layers of filter layer inside annular air duct, arc baffle and elastic support enhance stability.The application can realize self-cleaning function by mechanical cleaning and airflow guiding, reduce pollutant accumulation, improve detection accuracy, prolong equipment life, and have the characteristics of efficient filtration, stable operation and easy maintenance.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring and detection equipment technology, and in particular to a gas detector with self-cleaning function. Background Technology

[0002] In industrial production and environmental monitoring, gas detectors are widely used to detect the concentration of harmful gases in the air. For certain specific scenarios, this equipment is particularly important because it not only monitors gas composition in real time but also provides crucial assurance for safe production. Since the sensors of gas detectors are directly exposed to the environment, their surfaces are easily contaminated by dust, oil, or other impurities, which can affect detection accuracy and equipment lifespan. Therefore, regular sensor cleaning is a critical step in ensuring the normal operation of the equipment. Existing gas detectors mostly rely on manual cleaning or simple protective devices to reduce contamination. However, in actual use, manual cleaning requires downtime, affecting the continuity of detection work, while simple protective devices have limited adaptability to complex environments and are insufficient to effectively prevent the accumulation of pollutants. Therefore, existing equipment still has certain limitations in long-term use. Utility Model Content

[0003] The purpose of this utility model is to provide a gas detector with a self-cleaning function, which solves the problems mentioned in the background art.

[0004] This invention is implemented as follows: a gas detector with self-cleaning function includes a main housing with an air inlet at the top and an exhaust outlet at the bottom. It also includes a detection chamber inside the main housing, containing a sensor assembly. The sensor assembly includes a base fixedly installed within the detection chamber, on which multiple evenly distributed sensor probes are mounted. Each sensor probe has a detachable air guide cover on its outer side, forming an annular airflow channel between the inner wall of the air guide cover and the sensor probe. A drive module is located on one side of the main housing, with its output connected to a cleaning component via a transmission shaft. The cleaning component includes a cleaning disc rotatably mounted within the detection chamber, with multiple cleaning holes corresponding to the positions of the sensor probes. Flexible brush rings are embedded within these cleaning holes, with the inner diameter of the brush rings slightly smaller than the outer diameter of the sensor probes for close contact. A dust collection box is located below the cleaning disc, slidably connected to the inner wall of the main housing via a sliding rail structure. A filter screen is located at the bottom of the dust collection box, with its lower end connected to the exhaust outlet.

[0005] Preferably, the outer edge of the cleaning disc is provided with a toothed ring, which meshes with a gear on the drive shaft. The other end of the drive shaft is connected to the output shaft of the drive module through a coupling. The operation of the drive module drives the drive shaft to rotate, thereby driving the cleaning disc to rotate synchronously. The rotation direction of the cleaning disc is opposite to the airflow direction in the guide shroud to enhance the cleaning effect.

[0006] Preferably, an annular air duct is provided on the inner wall of the main housing. The inlet of the annular air duct is connected to the air inlet, and the outlet is connected to the annular airflow channel of the guide shroud through multiple branch pipes. Multiple filter layers are provided on the inner wall of the annular air duct. The filter layers are arranged from the outside to the inside as a coarse filter, an activated carbon filter, and a high-efficiency filter membrane, so as to purify the gas entering the detection chamber step by step.

[0007] Preferably, the top of the sensor probe is provided with an arc-shaped baffle, and a gap is left between the edge of the arc-shaped baffle and the inner wall of the flow guide to form an airflow guiding channel; the bottom of the arc-shaped baffle is connected to the base through an elastic bracket, and the two ends of the elastic bracket are respectively fixed to the base and the arc-shaped baffle by bolts. A spring sheet is provided in the middle of the elastic bracket to provide a buffering effect and prevent the arc-shaped baffle from loosening due to vibration.

[0008] Preferably, the outer wall of the flow guide shroud is provided with a plurality of flow guide grooves, which extend along the axial direction of the flow guide shroud and have a V-shaped cross-section to guide the airflow to flow in a specific direction; a sealing ring is provided at the bottom of the flow guide shroud, which is tightly fitted to the top surface of the base to prevent unfiltered gas from entering the detection chamber.

[0009] Preferably, a transparent observation window is provided on the top of the main housing, the inner side of the transparent observation window is provided with an anti-fog coating, and a protective cover is provided on the outer side of the transparent observation window. The protective cover is connected to the main housing by a hinge, and the edge of the protective cover is provided with a magnetic strip to achieve quick opening and closing. An LED light group is provided below the transparent observation window, and the LED light group is connected to a power module inside the main housing by a wire to provide lighting function.

[0010] Preferably, the drive module is provided with a soundproof cover, the inner wall of the soundproof cover is provided with sound-absorbing cotton, and the bottom of the soundproof cover is connected to the main housing through a shock-absorbing pad to reduce the noise and vibration generated by the drive module during operation; the control terminal of the drive module is connected to the control unit in the main housing through a signal line, and the control unit automatically adjusts the operating frequency of the drive module according to the detection data of the sensor components.

[0011] Preferably, the front end of the dust collection box is provided with a handle, the outer surface of which is covered with an anti-slip rubber layer, and limit blocks are provided on both sides of the handle. The limit blocks cooperate with the end of the slide rail structure to prevent the dust collection box from accidentally falling off. The rear end of the dust collection box is provided with a sealing cover, which is connected to the dust collection box by a buckle. A sealing strip is provided on the inner side of the sealing cover to ensure the airtightness of the dust collection box.

[0012] This utility model provides a gas detector with a self-cleaning function, which has the following advantages: The device uses the rotation of a cleaning disc to bring a flexible brush ring into contact with the sensor probe surface, removing adhering contaminants. Simultaneously, the airflow channel within the guide shroud forms a directional airflow, guiding the removed contaminants into the dust collection box, preventing secondary pollution. The design of the cleaning disc rotating in the opposite direction to the airflow further enhances the cleaning effect, while the multi-layered filter within the annular air duct effectively purifies the gas entering the detection chamber, reducing contaminant accumulation. Furthermore, the combined design of the arc-shaped baffle and elastic support not only provides airflow guidance but also enhances the stability of the sensor probe, extending the device's service life. In summary, this gas detector, through the combination of mechanical structure and airflow dynamics, achieves self-cleaning while also possessing the characteristics of high-efficiency filtration, stable operation, and ease of maintenance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the gas detector provided in an embodiment of the present invention, showing the layout relationship of the main housing, air inlet, exhaust outlet, detection chamber, sensor assembly, cleaning assembly and dust collection box.

[0014] Figure 2 This is a partial enlarged view of the cleaning disc and sensor probe in an embodiment of the present invention, showing in detail the contact position between the flexible brush ring on the cleaning disc and the sensor probe, as well as the annular airflow channel structure inside the guide shroud.

[0015] Figure 3 This is a schematic diagram of the transparent observation window on the top of the main housing and its related structures in an embodiment of this utility model, including the arrangement of the anti-fog coating, protective cover and LED light group.

[0016] The attached figures are labeled as follows:

[0017] 1. Main housing; 2. Air inlet; 3. Exhaust outlet; 4. Detection chamber; 5. Sensor probe; 6. Draft shield; 7. Cleaning tray; 8. Flexible brush ring; 9. Dust collection box; 10. Transparent observation window; 11. Protective cover; 12. LED light assembly; 13. Annular air duct; 14. Filter layer; 15. Arc-shaped baffle; 16. Flexible support. Detailed Implementation

[0018] This utility model provides a gas detector with self-cleaning function, the structure and operation of which are described through... Figures 1 to 3 Detailed explanation. For example... Figure 1 As shown, the main housing 1 serves as the main frame of the entire device. An air inlet 2 is located at its top, and an exhaust port 3 is located at its bottom. Gas enters through the air inlet 2, undergoes internal processing, and finally exits through the exhaust port 3. Inside the main housing 1 is a detection chamber 4, within which a sensor assembly is installed. The sensor assembly includes a base and multiple sensor probes 5 fixed to the base. The sensor probes 5 are evenly distributed to ensure comprehensive gas detection. Each sensor probe 5 is fitted with a flow guide 6. The inner wall of the flow guide 6 forms an annular airflow channel with the sensor probe 5. This channel guides gas flow and reduces contaminant adhesion.

[0019] A drive module is installed on one side of the main housing 1, and the drive module is connected to the cleaning assembly via a drive shaft. The core component of the cleaning assembly is the cleaning disc 7, which is located inside the detection chamber 4 and rotates via bearings. The cleaning disc 7 has multiple cleaning holes, each corresponding to a sensor probe 5. A flexible brush ring 8 is embedded within each cleaning hole. The inner diameter of the flexible brush ring 8 is slightly smaller than the outer diameter of the sensor probe 5, allowing it to contact the surface of the sensor probe 5 when the cleaning disc 7 rotates. A toothed ring is provided on the outer edge of the cleaning disc 7, meshing with a gear on the drive shaft. The other end of the drive shaft is connected to the output shaft of the drive module via a coupling. When the drive module is activated, the drive shaft drives the cleaning disc 7 to rotate synchronously, and the flexible brush ring 8 cleans the surface of the sensor probe 5 accordingly.

[0020] A dust collection box 9 is located below the cleaning disc 7. The dust collection box 9 is slidably connected to the inner wall of the main housing 1 via a sliding rail structure, facilitating disassembly and cleaning. A filter screen is located at the bottom of the dust collection box 9, with its lower part connected to the exhaust port 3. During cleaning, contaminants removed by the flexible brush ring 8 enter the dust collection box 9 with the airflow and are further separated by the filter screen. The purified gas is discharged from the exhaust port 3. A handle is located at the front of the dust collection box 9, with its outer surface covered with a non-slip rubber layer. Limiting blocks are located on both sides, engaging with the ends of the sliding rail structure to prevent the dust collection box 9 from accidentally falling off. A sealing cap is located at the rear of the dust collection box 9, connected to the dust collection box 9 by a snap-fit ​​mechanism. A sealing strip is installed on the inner side to ensure a tight seal.

[0021] An annular air duct 13 is provided on the inner wall of the main housing 1. The inlet of the annular air duct 13 is connected to the air inlet 2, and the outlet is connected to the annular airflow channel of the flow guide shroud 6 through multiple branch pipes. Multiple filter layers 14 are provided on the inner wall of the annular air duct 13. From the outside to the inside, the filter layers 14 consist of a coarse filter, an activated carbon filter, and a high-efficiency filter membrane. The gas undergoes step-by-step filtration before entering the detection chamber 4, effectively reducing the pollutant content. Multiple axially extending flow guide grooves are provided on the outer wall of the flow guide shroud 6. The cross-section of the flow guide grooves is V-shaped, used to guide the airflow in a specific direction. A sealing ring is provided at the bottom of the flow guide shroud 6, which fits tightly against the top surface of the base to prevent unfiltered gas from entering the detection chamber 4.

[0022] A curved baffle 15 is provided on the top of the sensor probe 5. A gap is left between the edge of the curved baffle 15 and the inner wall of the guide shroud 6 to form an airflow guiding channel. The bottom of the curved baffle 15 is connected to the base through an elastic bracket 16. The two ends of the elastic bracket 16 are fixed to the base and the curved baffle 15 respectively by bolts. A spring sheet is provided in the middle to provide a buffer and prevent the curved baffle 15 from loosening due to vibration. A transparent observation window 10 is provided on the top of the main housing 1. The inner side of the transparent observation window 10 is provided with an anti-fog coating, and the outer side is provided with a protective cover 11. The protective cover 11 is connected to the main housing 1 through a hinge, and a magnetic strip is provided on the edge to achieve quick opening and closing. An LED light group 12 is provided below the transparent observation window 10. The LED light group 12 is connected to the power module inside the main housing 1 through wires to provide lighting function.

[0023] The drive module is equipped with a soundproof enclosure, the inner wall of which is lined with sound-absorbing cotton. The bottom of the enclosure is connected to the main housing 1 via a shock-absorbing pad, reducing noise and vibration generated during operation. The control terminal of the drive module is connected to the control unit inside the main housing 1 via a signal line. The control unit automatically adjusts the operating frequency of the drive module based on the detection data from the sensor components. The rotation direction of the cleaning disc 7 is opposite to the airflow direction within the guide shroud 6. This design enhances the cleaning effect while preventing contaminants from re-adhering to the surface of the sensor probe 5.

[0024] In actual operation, after the gas enters the main housing 1 through the air inlet 2, it first passes through the annular air duct 13. The multi-layer filter layer 14 within the annular air duct 13 purifies the gas step by step. The purified gas then enters the annular airflow channel of the guide shroud 6 through a branch pipe, and then flows to the sensor probe 5 for detection. The data detected by the sensor probe 5 is transmitted to the control unit, which determines whether a cleaning program needs to be initiated based on the data. When cleaning is required, the drive module starts and drives the cleaning disc 7 to rotate via the drive shaft. The flexible brush ring 8 cleans the surface of the sensor probe 5, and the removed contaminants enter the dust collection box 9 with the airflow. After cleaning is completed, the drive module stops running, and the system returns to normal detection status.

[0025] The transparent observation window 10 and LED light group 12 on the top of the main housing 1 allow operators to observe the internal situation in real time. The protective cover 11 protects the transparent observation window 10 from external damage. The dust collection box 9 can be periodically pulled out for cleaning via the handle. After cleaning, it can be reinstalled, and its stability and sealing are ensured by the limit block and sealing cover. The entire device achieves self-cleaning function through a combination of mechanical structure and airflow dynamics, while also featuring high-efficiency filtration, stable operation, and easy maintenance.

[0026] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with a specific application scenario.

[0027] In industrial production environments, gas detectors are installed in areas where hazardous gas leaks may occur, such as chemical plant production workshops. The air in these areas contains high concentrations of dust and oil particles, which easily adhere to the sensor surface, affecting detection accuracy. During operation, ambient gas is first introduced through inlet 2. After entering the main housing 1, the gas flows along the annular duct 13. The annular duct 13 contains a coarse filter, an activated carbon filter layer, and a high-efficiency filter membrane, which purify the gas in stages. The coarse filter intercepts larger particles, the activated carbon filter layer adsorbs volatile organic compounds, and the high-efficiency filter membrane further removes fine particles, ensuring that the cleanliness of the gas entering the detection chamber 4 meets the detection requirements.

[0028] Subsequently, the filtered gas enters the annular airflow channel of the guide shroud 6 through branch pipes and flows in a specific direction under the guidance of the guide groove. The V-shaped cross-section design of the guide groove ensures uniform airflow distribution, preventing local airflow turbulence from impacting the sensor probe 5. The gap between the arc-shaped baffle 15 and the inner wall of the guide shroud 6 forms an airflow guiding channel, along which the airflow flows to the surface of the sensor probe 5, thereby reducing the deposition of contaminants on the sensor surface. The elastic support 16, through the cushioning provided by its spring plates, ensures that the arc-shaped baffle 15 remains stable during equipment operation, while preventing loosening or displacement due to vibration.

[0029] When sensor probe 5 detects an abnormal gas concentration or the control unit determines that cleaning is required based on preset conditions, the drive module starts and drives the cleaning disc 7 to rotate via the transmission shaft. The flexible brush ring 8 on the cleaning disc 7 rotates accordingly. Its inner diameter is slightly smaller than the outer diameter of sensor probe 5, allowing it to fit tightly against the surface of sensor probe 5. During the rotation of the cleaning disc 7, the flexible brush ring 8 applies moderate pressure to the surface of sensor probe 5, removing adhering dust and oil particles. The rotation direction of the cleaning disc 7 is opposite to the airflow direction within the guide shroud 6. This design not only enhances the cleaning effect but also prevents the removed contaminants from re-adhering to the surface of sensor probe 5.

[0030] The removed pollutants enter the dust collection box 9 with the airflow. A filter at the bottom of the dust collection box 9 further separates the pollutants, and the purified gas is discharged from the exhaust port 3. The dust collection box 9 is connected to the inner wall of the main housing 1 via a sliding rail structure, facilitating periodic removal and cleaning by the operator. During cleaning, the operator pulls the dust collection box 9 along the sliding rail using the handle; a limiting block engages with the end of the sliding rail to prevent the dust collection box 9 from accidentally falling off. After cleaning, the dust collection box 9 is reinstalled and sealed with a sealing cap to ensure airtightness and prevent leakage of unfiltered gas.

[0031] During equipment operation, the transparent observation window 10 and LED light group 12 provide operators with convenient real-time monitoring of the internal situation. The anti-fog coating on the inside of the transparent observation window 10 ensures clear observation, and the protective cover 11 can be quickly opened and closed via a magnetic strip to protect the transparent observation window 10 from external damage. The soundproof cover and shock-absorbing pads on the outside of the drive module effectively reduce operating noise and vibration, ensuring stable operation of the equipment in complex environments.

[0032] In summary, through the above steps and structural design, this utility model achieves the self-cleaning function of the gas detector, while also possessing the characteristics of efficient filtration, stable operation, and easy maintenance. The synergistic effect of each component ensures that the equipment maintains high detection accuracy and reliability during long-term use, meeting the actual needs of industrial production and environmental monitoring.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas detector with self-cleaning function, comprising a main housing (1), wherein an air inlet (2) is provided at the top of the main housing (1) and an exhaust outlet (3) is provided at the bottom, characterized in that, Also includes: The detection chamber (4) is located inside the main shell (1). A sensor assembly is provided inside the detection chamber (4). The sensor assembly includes a base fixedly installed inside the detection chamber (4). Multiple sensor probes (5) are evenly distributed on the base. A detachable flow guide (6) is fitted on the outside of each sensor probe (5). An annular airflow channel is formed between the inner wall of the flow guide (6) and the sensor probe (5). The drive module is located on one side of the main housing (1). The output end of the drive module is connected to the cleaning component via a transmission shaft. The cleaning component includes a cleaning disc (7) rotatably disposed in the detection chamber (4). The cleaning disc (7) has multiple cleaning holes corresponding to the position of the sensor probe (5). A flexible brush ring (8) is embedded in the cleaning hole. The inner diameter of the flexible brush ring (8) is smaller than the outer diameter of the sensor probe (5) to achieve close contact. The dust collection box (9) is located below the cleaning tray (7). The dust collection box (9) is slidably connected to the inner wall of the main housing (1) through a slide rail structure. A filter screen is provided at the bottom of the dust collection box (9), and the bottom of the filter screen is connected to the exhaust port (3).

2. A gas detector with self-cleaning function according to claim 1, characterized in that, The outer edge of the cleaning disc (7) is provided with a toothed ring, which meshes with the gear on the drive shaft. The other end of the drive shaft is connected to the output shaft of the drive module through a coupling. The rotation direction of the cleaning disc (7) is opposite to the airflow direction inside the guide shroud (6).

3. A gas detector with self-cleaning function according to claim 1, characterized in that, The inner wall of the main housing (1) is provided with an annular air duct (13). The inlet of the annular air duct (13) is connected to the air inlet (2), and the outlet is connected to the annular airflow channel of the guide shroud (6) through multiple branch pipes. The inner wall of the annular air duct (13) is provided with multiple filter layers (14). The filter layers (14) are, from the outside to the inside, a coarse filter screen, an activated carbon filter layer and a high-efficiency filter membrane.

4. A gas detector with self-cleaning function according to claim 1, characterized in that, The top of the sensor probe (5) is provided with an arc-shaped baffle (15). A gap is left between the edge of the arc-shaped baffle (15) and the inner wall of the guide shroud (6) to form an airflow guiding channel. The bottom of the arc-shaped baffle (15) is connected to the base through an elastic bracket (16). The two ends of the elastic bracket (16) are respectively fixed to the base and the arc-shaped baffle (15) by bolts. A spring sheet is provided in the middle of the elastic bracket (16).

5. A gas detector with self-cleaning function according to claim 1, characterized in that, The outer wall of the flow guide (6) is provided with a plurality of flow guide grooves. The flow guide grooves extend along the axial direction of the flow guide (6) and have a V-shaped cross-section. A sealing ring is provided at the bottom of the flow guide (6) and the sealing ring is tightly fitted to the top surface of the base.

6. A gas detector with self-cleaning function according to claim 1, characterized in that, The top of the main housing (1) is provided with a transparent observation window (10), the inner side of the transparent observation window (10) is provided with an anti-fog coating, the outer side of the transparent observation window (10) is provided with a protective cover (11), the protective cover (11) is connected to the main housing (1) by a hinge, the edge of the protective cover (11) is provided with a magnetic strip, and an LED light group (12) is provided below the transparent observation window (10), the LED light group (12) is connected to the power module inside the main housing (1) by a wire.

7. A gas detector with self-cleaning function according to claim 1, characterized in that, The dust collection box (9) is provided with a handle at the front end. The outer surface of the handle is covered with an anti-slip rubber layer. Limiting blocks are provided on both sides of the handle. The limiting blocks cooperate with the end of the slide rail structure. The dust collection box (9) is provided with a sealing cover at the rear end. The sealing cover is connected to the dust collection box (9) by a buckle. A sealing strip is provided on the inner side of the sealing cover.

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