Laser scattering-beta ray dual mode dust concentration detection device

Abstract

The application discloses a laser scattering-beta ray dual-mode dust concentration detection device and belongs to the technical field of dust concentration detection. The device comprises a dust concentration detection mechanism, a ray adjusting mechanism is arranged in the dust concentration detection mechanism, the dust concentration detection mechanism comprises an outer cavity, dynamic flow compensation components and reflux components are arranged on the upper and lower sides of the outer cavity, and air outlet adjusting components are arranged at the four ends of the reflux components. The adjusting components drive the adjustment of the inner cavity rotation, the positions of the beta ray incident port, the laser incident port and the single group incident port can be adjusted, the detection mode can be selected according to the requirement, when the beta ray incident port and the single group incident port correspond to the laser scattering module and the beta ray module respectively, the dual-module synchronous work can be achieved, the precision is improved through data complementary calibration, and the single module can be selected to adapt to different detection requirements through the single group incident port switching.

Description

Technical Field

[0001] This invention relates to the field of dust concentration detection technology, and more particularly to a laser scattering-β-ray dual-mode dust concentration detection device. Background Technology

[0002] Dust concentration detection is a crucial step in industrial production, environmental monitoring, and public health management. Excessive dust concentration not only harms human respiratory health and causes occupational diseases but also poses safety hazards such as explosions and equipment wear. Accurate dust concentration detection is of great significance for ensuring production and living safety and protecting the ecological environment. Existing dust concentration detection devices mostly adopt a single detection mode. Laser scattering detection has a fast response and is easy to operate, but it is easily affected by the particle size distribution of dust, resulting in limited detection accuracy. Beta-ray detection has high accuracy and strong anti-interference ability, but the detection cycle is long, making it difficult to meet the needs of rapid response and accurate detection. Moreover, the sampling gas path has unstable flow rate and lacks particle size classification structure, leading to data distortion. The inner wall of the chamber is prone to electrostatic adsorption of dust, further interfering with the detection results. At the same time, the transmitter and receiver of the detection module are prone to dust accumulation, leading to signal attenuation and increased detection error. Traditional cleaning methods mostly involve manual periodic cleaning, which is cumbersome and affects the continuity of detection, making it difficult to meet the dust concentration detection requirements of "accurate, efficient, stable, continuous, and self-adaptive cleaning" in complex scenarios.

[0003] To address the above problems, this invention proposes a laser scattering-β-ray dual-mode dust concentration detection device. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing dust concentration detection devices, which mostly employ a single detection mode, making it difficult to simultaneously meet the requirements of rapid response and accurate detection. Furthermore, the unstable flow rate of the sampling gas path and the lack of particle size classification structure lead to distorted detection data. The inner wall of the cavity is prone to electrostatic adsorption of dust, further interfering with the detection results. At the same time, the transmitter and receiver of the detection module are easily contaminated with dust, resulting in signal attenuation and increased detection errors. Traditional cleaning methods mostly involve manual periodic cleaning, which is cumbersome and affects the continuity of detection. Therefore, the proposed invention is a laser scattering-β-ray dual-mode dust concentration detection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A laser scattering-β-ray dual-mode dust concentration detection device includes a dust concentration detection mechanism, wherein the dust concentration detection mechanism is provided with a ray adjustment mechanism; The dust concentration detection mechanism includes an outer cavity, and dynamic flow compensation components and reflux components are provided on both the upper and lower sides of the outer cavity. Each of the four ends of the reflux component is provided with an exhaust regulating component. The radiation adjustment mechanism includes a mounting frame, an adjustment component, and an adjustment cavity. The mounting frame is fixedly connected to the outer cavity. Two opposing laser scattering modules and two beta-ray modules are installed in the mounting frame, and each exhaust adjustment component corresponds to a laser scattering module and a beta-ray module. The adjustment component is connected to the adjustment cavity, which is provided with two laser inlet ports, two beta-ray inlet ports, and two single-set inlet ports.

[0006] Preferably, a mounting bracket is fixedly connected to the lower part of the outer cavity, and a vent valve structure is provided above the outer cavity.

[0007] Preferably, the dynamic flow compensation component includes a venturi tube structure, through which a high-voltage ionizer passes.

[0008] Preferably, an impact particle size classifier is provided below the Venturi tube structure, the impact particle size classifier is installed on the outer cavity, and a fan is provided below the Venturi tube structure.

[0009] Preferably, by adjusting the rotation of the inner cavity, the β-ray inlet and the laser inlet are smoothly aligned with the laser scattering module and the β-ray module, so that the two sets of rays work synchronously, while the operation of a single set of rays can be switched through a single set of inlet.

[0010] Preferably, the adjustment assembly includes a fixed base, which is fixedly connected to the impact particle size classifier. A drive motor is fixedly mounted on the fixed base, and a drive gear is fixedly connected to the output shaft of the drive motor. The drive gear meshes with a gear ring, which is mounted on the adjustment cavity.

[0011] Preferably, the reflux assembly includes a filter structure installed below the outer cavity, and the bottom of the filter structure is connected to a multi-channel delivery pipe.

[0012] Preferably, the adjusting inner cavity is rotatably mounted on the filter structure and the impact particle size classifier via a bearing, and the adjusting inner cavity is connected to the filter structure and the impact particle size classifier.

[0013] Preferably, the exhaust regulating assembly includes a sealing cavity and a regulating cavity. The sealing cavity is connected to a tangential guide port, and the tangential guide port is connected to a multi-way delivery pipe. The regulating cavity is rotatably installed in the sealing cavity via a bearing. The inner circumference of the regulating cavity is provided with multiple inclined nozzle structures, and the length of each nozzle structure increases sequentially. The incident light from the laser scattering module and the beta-ray module passes through the adjustment cavity and enters the adjustment inner cavity.

[0014] Preferably, a plurality of fan blades are fixedly connected to the outer periphery of the regulating cavity, and an air outlet is provided on the outer periphery of the regulating cavity. The curved surface of the fan blades is adapted to the fluid outlet direction of the tangential guide port, thereby guiding the fluid to impact the fan blades in a tangential direction to rotate.

[0015] Compared with the prior art, the present invention provides a laser scattering-β-ray dual-mode dust concentration detection device, which has the following beneficial effects: 1. This laser scattering-β-ray dual-mode dust concentration detection device adjusts the position of the β-ray inlet, laser inlet, and single-group inlet by driving the inner cavity rotation through the adjustment component. This allows selection of the detection mode as needed. When the β-ray inlet and single-group inlet correspond to the laser scattering module and β-ray module respectively, the two modules can work synchronously, improving accuracy through data complementarity calibration. Switching between single-group inlets allows for selection of a single module to suit different detection requirements. Furthermore, the sampling gas path adopts a Venturi tube structure, accurately maintaining a constant flow rate. Combined with an impactor particle size classifier, dust can be classified, effectively reducing the interference of particle size distribution on the detection results. Simultaneously, the inner wall of the cavity is coated with a graphene conductive layer, which, together with a high-voltage ionizer, quickly eliminates electrostatic adsorption, preventing dust adhesion to the inner wall from affecting gas flow and detection stability.

[0016] 2. This laser scattering-β-ray dual-mode dust concentration detection device uses a reflux assembly to discharge the airflow from the detection port through an outlet regulating assembly. This causes the tangentially entering airflow to drive the fan blades to rotate, which in turn causes the nozzle structure to rotate and eject gas to the emitting and receiving ends of the laser scattering module and the β-ray module. No additional cleaning source is required. The device uses multi-directional airflow jets to target and purge the laser scattering module and the β-ray module without manual intervention. This avoids signal attenuation and detection distortion caused by dust contamination and does not affect the continuity of the detection process.

[0017] 3. This laser scattering-β-ray dual-mode dust concentration detection device reduces the drive structure and cost by recirculating the detected airflow. Simultaneously, the recirculated clean gas can be directly sprayed onto the laser scattering module and β-ray module through the outlet regulating component, effectively cleaning them. Furthermore, the clean airflow prevents interference with detection accuracy, ensuring stable signal transmission from the laser scattering module and cleanliness at the β-ray module's detection end. Combined with the stable gas path and anti-static design of the dynamic flow compensation component, the reliability of dual-module data calibration is further enhanced. This allows it to adapt to complex working conditions in various scenarios, significantly improving detection continuity and data reliability, while also reducing subsequent maintenance costs. Attached Figure Description

[0018] Figure 1 This is a perspective view of the laser scattering-β-ray dual-mode dust concentration detection device proposed in this invention; Figure 2This is a perspective view of the outer cavity of the laser scattering-β-ray dual-mode dust concentration detection device proposed in this invention; Figure 3 This is a cross-sectional perspective view of the laser scattering-β-ray dual-mode dust concentration detection device proposed in this invention; Figure 4 This is a top-view perspective view of the laser scattering-β-ray dual-mode dust concentration detection device proposed in this invention. Figure 5 This is a perspective view of the connection between the adjustment component and the adjustment cavity of the laser scattering-β-ray dual-mode dust concentration detection device proposed in this invention. Figure 6 This is a three-dimensional view of the adjustment cavity of the laser scattering-β-ray dual-mode dust concentration detection device proposed in this invention; Figure 7 This is a perspective view of the connection between the reflux assembly and the exhaust gas regulation assembly of the laser scattering-β-ray dual-mode dust concentration detection device proposed in this invention. Figure 8 This is a perspective view of the reflux component of the laser scattering-β-ray dual-mode dust concentration detection device proposed in this invention; Figure 9 This is a three-dimensional cross-sectional view of the exhaust gas regulating component of the laser scattering-β-ray dual-mode dust concentration detection device proposed in this invention. Figure 10 This is a three-dimensional cross-sectional view of the sealed cavity of the laser scattering-β-ray dual-mode dust concentration detection device proposed in this invention.

[0019] In the diagram: 100, Dust concentration detection mechanism; 101, External cavity; 102, Dynamic flow compensation component; 1021, Venturi tube structure; 1022, High-voltage ionizer; 1023, Impact particle size classifier; 103, Mounting bracket; 104, Venturi valve structure; 105, Reflux assembly; 1051, Filter structure; 1052, Multi-port delivery pipe; 106, Exhaust gas regulating component; 1061, Tangential guide port; 1062, Sealing cavity; 1063 1064. Adjustment chamber; 1065. Fan blade; 1066. Nozzle structure; 1067. Air outlet; 200. Ray adjustment mechanism; 201. Mounting frame; 202. Laser scattering module; 203. Adjustment inner cavity; 204. Single set of inlet ports; 205. Laser inlet port; 206. Beta ray module; 207. Beta ray inlet port; 208. Adjustment component; 2081. Drive motor; 2082. Drive gear; 2083. Fixing base; 2084. Gear ring. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Example 1: Refer to Figures 1-7 A laser scattering-β-ray dual-mode dust concentration detection device includes a dust concentration detection mechanism 100, in which a ray adjustment mechanism 200 is provided; The dust concentration detection mechanism 100 includes an outer cavity 101. A mounting bracket 103 is fixedly connected to the lower part of the outer cavity 101. A venting valve structure 104 is provided above the outer cavity 101. The venting valve structure 104 can achieve the purpose of depressurization and discharge excess gas. Dynamic flow compensation components 102 and reflux components 105 are provided on the upper and lower sides of the outer cavity 101. The dynamic flow compensation component 102 includes a venturi tube structure 1021. A high-voltage ionizer 1022 passes through the venturi tube structure 1021. An impact particle size classifier 1023 is provided below the venturi tube structure 1021. The impact particle size classifier 1023 is installed on the outer cavity 101. A fan is provided below the venturi tube structure 1021. The fan can smoothly introduce airflow into the regulating inner cavity 203 for detection. An outlet regulating component 106 is provided at each of the four ends of the reflux component 105. The X-ray adjustment mechanism 200 includes a mounting frame 201, an adjustment component 208, and an adjustment cavity 203. The adjustment component 208 includes a fixed base 2083, which is fixedly connected to the impact particle size classifier 1023. A drive motor 2081 is fixedly mounted on the fixed base 2083, ensuring the stability of the drive motor 2081. The output shaft of the drive motor 2081 is fixedly connected to a drive gear 2082. The drive motor 2081 drives the drive gear 2082 to rotate, allowing the drive gear 2082 to transmit power to the gear ring 2084. This, in turn, drives the adjustment cavity 203 to rotate, thus allowing for smooth adjustment of the positions of the single-group inlet 204, the beta-ray inlet 207, and the laser inlet 205. Furthermore, it allows for rapid switching between the laser scattering module 202 and the beta-ray module 206 to meet different detection requirements. The drive gear 2082 and... The gear ring 2084 is engaged and installed on the adjusting inner cavity 203. The mounting frame 201 is fixedly connected to the outer cavity 101. Two opposing laser scattering modules 202 and two beta ray modules 206 are installed in the mounting frame 201. Each exhaust regulating component 106 corresponds to the laser scattering module 202 and the beta ray module 206. The two laser scattering modules 202 and the beta ray module 206 are the receiving end and the transmitting end, respectively, so as to achieve the purpose of dust detection. The regulating component 208 is connected to the adjusting inner cavity 203. The adjusting inner cavity 203 is provided with two laser inlet ports 205, two beta ray inlet ports 207 and two single-group inlet ports 204. By rotating the adjusting inner cavity 203, the beta ray inlet ports 207 and the laser inlet ports 205 are smoothly aligned with the laser scattering modules 202 and the beta ray modules 206, so that the two groups of rays work synchronously. The operation of a single group of rays can be switched through the single-group inlet ports 204.

[0023] In this embodiment: the adjustment component 208 drives the adjustment cavity 203 to rotate, thereby adjusting the position of the β-ray inlet 207, the laser inlet 205, and the single inlet 204. The detection mode can be selected as needed. When the β-ray inlet 207 and the single inlet 204 correspond to the laser scattering module 202 and the β-ray module 206 respectively, the two modules can work synchronously. This improves the accuracy through data complementary calibration. By switching the single inlet 204, a single module can be selected to adapt to different detection requirements. Secondly, the sampling gas path adopts a Venturi tube structure 1021, which can accurately maintain a constant flow rate. Combined with an impact particle size classifier 1023, it can classify dust and effectively reduce the interference of particle size distribution on the detection results. At the same time, the inner wall of the cavity is coated with a graphene conductive layer, which, together with the high-voltage ionizer 1022, quickly eliminates electrostatic adsorption and prevents dust from adhering to the inner wall and affecting the gas path flow and detection stability.

[0024] Example 2: Refer to Figures 8-10 A laser scattering-β-ray dual-mode dust concentration detection device includes a reflux assembly 105, which includes a filter structure 1051 installed below the outer cavity 101. The bottom of the filter structure 1051 is connected to a multi-port delivery pipe 1052. The airflow can be filtered through the filter structure 1051. The multi-port delivery pipe 1052 adopts a four-way diversion design, which can be connected to the tangential guide port 1061 for guiding the flow. The adjusting inner cavity 203 is rotatably mounted on the filter structure 1051 and the impact particle size classifier 1023 through a bearing. The adjusting inner cavity 203 can be kept stable by the bearing, so that the positions of the β-ray inlet 207, the laser inlet 205 and the single inlet 204 can be smoothly adjusted. The adjusting inner cavity 203 is connected to the filter structure 1051 and the impact particle size classifier 1023. The exhaust regulating assembly 106 includes a sealing cavity 1062 and a regulating cavity 1063. The sealing cavity 1062 is connected to a tangential guide port 1061, which is connected to a multi-port delivery pipe 1052. The regulating cavity 1063 is rotatably mounted in the sealing cavity 1062 via a bearing. The regulating cavity 1063 can rotate smoothly via the bearing, causing the nozzle structure 1065 to rotate smoothly. The inner circumference of the regulating cavity 1063 is provided with multiple inclined nozzle structures 1065, each with an increasing length. The airflow ejected through the nozzle structures 1065 can clean the laser scattering module 202 and the beta-ray module 206. The different lengths of the nozzle structures 1065 allow for changing the spray position, effectively preventing dust and impurities from adhering to the laser scattering module 202 and the beta-ray module 206. 6. To improve the detection accuracy of the laser scattering module 202 and the beta ray module 206, the incident light from the laser scattering module 202 and the beta ray module 206 passes through the adjustment cavity 1063 and enters the adjustment inner cavity 203. Multiple fan blades 1064 are fixedly connected to the outer periphery of the adjustment cavity 1063. The airflow is tangentially discharged through the tangential guide port 1061 and acts on the fan blades 1064, thereby driving the fan blades 1064 to rotate. This causes the adjustment cavity 1063 to drive the nozzle structure 1065 to rotate, which can then be combined with nozzle structures 1065 of different lengths to achieve a multi-directional cleaning effect. Furthermore, the outer periphery of the adjustment cavity 1063 is provided with an air outlet 1066. The curved surface of the fan blades 1064 is adapted to the fluid outlet direction of the tangential guide port 1061, thereby guiding the fluid to impact the fan blades 1064 to rotate in a tangential direction.

[0025] In this embodiment: the airflow from the detection port is discharged through the outlet regulating component 208 via the return component 105, causing the tangentially entering airflow to drive the fan blade 1064 to rotate. The fan blade 1064 drives the regulating cavity 1063 to rotate, and the regulating cavity 1063 adjusts the nozzle structure 1065 to rotate, causing the nozzle structure 1065 to rotate and eject gas to the transmitting and receiving ends of the laser scattering module 202 and the beta-ray module 206. No additional cleaning source is required. The laser scattering module 202 and the beta-ray module 206 are targeted and purged by multi-directional airflow jetting without manual intervention. This avoids signal attenuation and detection distortion caused by dust contamination and does not affect the continuity of the detection process.

[0026] Example 3: Reference Figures 1-4 and Figure 7 A dual-mode dust concentration detection device for laser scattering and beta rays includes a dust concentration detection mechanism 100, a ray adjustment mechanism 200 in the dust concentration detection mechanism 100, an outer cavity 101, a dynamic flow compensation component 102 and a reflux component 105 on both the upper and lower sides of the outer cavity 101, and an exhaust adjustment component 106 at each of the four ends of the reflux component 105. The X-ray adjustment mechanism 200 includes a mounting frame 201, an adjustment component 208, and an adjustment cavity 203. The mounting frame 201 is fixedly connected to the outer cavity 101. Two opposing laser scattering modules 202 and two beta-ray modules 206 are installed in the mounting frame 201, and each exhaust adjustment component 106 corresponds to the laser scattering module 202 and the beta-ray module 206. The adjustment component 208 is connected to the adjustment cavity 203. The adjustment cavity 203 is provided with two laser inlet ports 205, two beta-ray inlet ports 207, and two single-set inlet ports 204.

[0027] In this embodiment, by recirculating the detected airflow, the driving structure and cost can be reduced. At the same time, the recirculated clean gas can be directly sprayed onto the laser scattering module 202 and the beta-ray module 206 through the outlet regulating component 208, effectively cleaning them. Moreover, the clean airflow prevents it from affecting the detection accuracy, ensuring stable signal transmission of the laser scattering module 202 and clean detection end of the beta-ray module 206. In addition, the stable gas path and anti-static design of the dynamic flow compensation component 102 further enhance the reliability of the dual-module data calibration, thus adapting to complex working conditions in multiple scenarios, significantly improving detection continuity and data reliability, and reducing subsequent maintenance costs.

[0028] Working principle: When detecting dust concentration, a constant flow rate is maintained by the intake of the Venturi tube structure 1021. At the same time, the high-voltage ionizer 1022 and the graphene conductive coating on the inner wall of the cavity can quickly eliminate electrostatic adsorption. Then, the particles are classified by the impact particle size classifier 1023 and enter the regulating inner cavity 203. At this time, the laser scattering module 202 and the β-ray module 206 transmit light from the emitting end and enter the airflow, and then to the receiving end, so as to perform the detection operation. When a single module needs to be tested, the drive motor 2081 drives the drive gear 2082 to rotate. The drive gear 2082 and the gear ring 2084 drive each other, causing the adjustment cavity 203 to rotate. This allows the single entrance port 204 to switch between the corresponding laser scattering module 202 and the β-ray module 206, thus enabling the testing of a single module. After the airflow is filtered by the filter structure 1051, it enters the sealed cavity 1062 through the multi-pass delivery pipe 1052 and the tangential guide port 1061, so that the tangential airflow can impact the fan blade 1064 to drive the regulating cavity 1063 to rotate. The regulating cavity 1063 drives the nozzle structure 1065 to rotate, so that the airflow can be sprayed onto the laser scattering module 202 and the β-ray module 206 through the air outlet 1066 and the nozzle structure 1065, thereby achieving self-cleaning operation.

[0029] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A laser scattering-β-ray dual-mode dust concentration detection device, comprising a dust concentration detection mechanism (100), characterized in that, The dust concentration detection mechanism (100) is equipped with a radiation adjustment mechanism (200). The dust concentration detection mechanism (100) includes an outer cavity (101), and a dynamic flow compensation component (102) and a return component (105) are provided on both the upper and lower sides of the outer cavity (101). An exhaust regulating component (106) is provided at each of the four ends of the return component (105). The radiation adjustment mechanism (200) includes a mounting frame (201), an adjustment component (208), and an adjustment cavity (203). The mounting frame (201) is fixedly connected to the outer cavity (101). Two opposing laser scattering modules (202) and two beta-ray modules (206) are installed in the mounting frame (201), and each exhaust adjustment component (106) corresponds to the laser scattering module (202) and the beta-ray module (206). The adjustment component (208) is connected to the adjustment cavity (203), and the adjustment cavity (203) is provided with two laser inlet ports (205), two beta-ray inlet ports (207), and two single-set inlet ports (204).

2. The laser scattering-β-ray dual-mode dust concentration detection device according to claim 1, characterized in that, A mounting bracket (103) is fixedly connected to the lower part of the outer cavity (101), and a vent valve structure (104) is provided above the outer cavity (101).

3. The laser scattering-β-ray dual-mode dust concentration detection device according to claim 1, characterized in that, The dynamic flow compensation component (102) includes a venturi tube structure (1021) through which a high-voltage ionizer (1022) passes.

4. The laser scattering-β-ray dual-mode dust concentration detection device according to claim 3, characterized in that, An impact particle size classifier (1023) is provided below the Venturi tube structure (1021). The impact particle size classifier (1023) is installed on the outer cavity (101). A fan is provided below the Venturi tube structure (1021).

5. The laser scattering-β-ray dual-mode dust concentration detection device according to claim 1, characterized in that, By rotating the inner cavity (203), the β-ray inlet (207) and the laser inlet (205) are smoothly aligned with the laser scattering module (202) and the β-ray module (206), so that the two sets of rays work synchronously, while the operation of a single set of rays can be switched through a single inlet (204).

6. The laser scattering-β-ray dual-mode dust concentration detection device according to claim 4, characterized in that, The adjustment assembly (208) includes a fixed base (2083), which is fixedly connected to the impact particle size classifier (1023). A drive motor (2081) is fixedly installed on the fixed base (2083). A drive gear (2082) is fixedly connected to the output shaft of the drive motor (2081). The drive gear (2082) meshes with a gear ring (2084), which is installed on the adjustment cavity (203).

7. The laser scattering-β-ray dual-mode dust concentration detection device according to claim 6, characterized in that, The reflux assembly (105) includes a filter structure (1051) installed below the outer cavity (101), and the bottom of the filter structure (1051) is connected to a multi-port delivery pipe (1052).

8. The laser scattering-β-ray dual-mode dust concentration detection device according to claim 7, characterized in that, The regulating cavity (203) is rotatably mounted on the filter structure (1051) and the impact particle size classifier (1023) via a bearing, and the regulating cavity (203) is connected to the filter structure (1051) and the impact particle size classifier (1023).

9. The laser scattering-β-ray dual-mode dust concentration detection device according to claim 7, characterized in that, The exhaust regulating assembly (106) includes a sealing cavity (1062) and a regulating cavity (1063). The sealing cavity (1062) is connected to a tangential guide port (1061), and the tangential guide port (1061) is connected to a multi-way delivery pipe (1052). The regulating cavity (1063) is rotatably mounted in the sealing cavity (1062) via a bearing. The inner circumference of the regulating cavity (1063) is provided with multiple inclined nozzle structures (1065), and the length of each nozzle structure (1065) increases sequentially. The incident light from the laser scattering module (202) and the beta-ray module (206) passes through the adjustment cavity (1063) and enters the adjustment inner cavity (203).

10. The laser scattering-β-ray dual-mode dust concentration detection device according to claim 9, characterized in that, Multiple fan blades (1064) are fixedly connected to the outer periphery of the regulating cavity (1063), and an air outlet (1066) is provided on the outer periphery of the regulating cavity (1063). The curved surface of the fan blade (1064) is adapted to the fluid outlet direction of the tangential guide port (1061), thereby guiding the fluid to impact the fan blade (1064) to rotate in a tangential direction.

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