Detection equipment for dust environment and detection method thereof

Abstract

The invention discloses dust environment detection equipment and a detection method thereof, and relates to the field of dust detection, the dust environment detection equipment comprises a detector shell, an airflow pipe located in the detector shell, an airflow switching device and an optical detection device, the two ends of the airflow pipe are communicated with the two ends of the inner wall of the detector shell respectively, and the airflow switching device and the optical detection device are sequentially arranged on the airflow pipe in the airflow direction; and a suction fan. According to the dust environment detection equipment, dust in air can be continuously and effectively monitored, a dust airflow channel can be automatically and automatically cleaned, meanwhile, optical devices can be automatically detected, and optical devices polluted by dust can be cleaned until the polluted optical devices return to normal.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of dust detection, and specifically relates to a detection device for a dust environment and a detection method thereof. Background Art

[0002] Dust data measuring instruments can acquire dust data. Dust data is of great significance to the protection of environmental quality, the promotion of industrial production, and the assistance of urban planning and management. The principles of existing dust detection equipment include light scattering method, electrostatic induction method, micro-weight balance method, etc. The light scattering method has the advantages of being able to measure dust particles of different sizes, shapes and optical properties in real time, with high measurement accuracy and fast response speed, but dust contamination of optical devices will affect the measurement data.

[0003] A conventional dust data detector includes a rotatable drum selectively driven by a drive device. A rotatable annular channel is formed within the rotatable drum. The rotatable drum is provided with a detection channel for inputting dust gas and a laser emission channel for connecting to a laser emitter. The detection channel is connected to the laser emission channel via the rotatable annular channel. The detection channel has a corresponding clearance fit with the surface of the dust detection sensor, and the laser emission channel has a corresponding clearance fit with the surface of the laser emitter. A cleaning tool is fixed to the outer surface of the rotatable drum. The dust sensor includes a self-cleaning mode and a detection mode that can be switched between them. This conventional product effectively prevents dust particles from accumulating on the surfaces of the dust detection sensor and the laser emitter, thereby increasing the service life of the dust sensor.

[0004] Products in the prior art effectively prevent the accumulation of dust particles on the surface of the dust detection sensor device and the surface of the laser emitter, but are not convenient for quickly detecting the electrical components to be cleaned and effectively cleaning the electrical components to be cleaned. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a detection device for dust environment and a detection method thereof to solve the technical problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a detection device for a dust environment, comprising a detector housing, an airflow tube located in the detector housing and having two ends connected to the two ends of the inner wall of the detector housing, and an airflow switching device, an optical detection device, and a suction fan sequentially arranged on the airflow tube along the airflow direction, the optical detection device comprising a light source tube and a light receiving tube symmetrically arranged on both sides of the airflow tube and connected to the airflow tube, two mounting plates symmetrically arranged on both sides of the airflow tube, a power plate slidably connected to the mounting plates through a slide groove, two laser emitting tubes arranged on one of the power plates, two scattered light receiving tubes arranged on the other power plate, and an outer wall of the power plate extending to the outside of the slide groove; It also includes two cleaning devices symmetrically arranged on both sides of the airflow tube, the cleaning device includes a base plate arranged on the outer wall of the airflow tube and sleeved on the outside of the light receiving tube, an airflow blowing component and a wiping cloth symmetrically arranged on the base plate with the light receiving tube as the axis.

[0007] Preferably, the invention further comprises a driving component provided on the outer wall of the mounting plate, the driving component being used to drive the power plate, the driving component comprising two positioning rollers connected to the mounting plate via a bearing seat and symmetrically arranged, two transmission belts sleeved between the two positioning rollers and symmetrically arranged, and a driving motor provided on the outer wall of the mounting plate and used to drive one of the positioning rollers to rotate, the outer wall of the transmission belt being connected to the outer wall of the power plate; The device further includes a tension assembly that passes through the mounting plate. The tension assembly comprises an L-shaped rod with one end extending through the mounting plate, a support spring that is mounted on the outside of the L-shaped rod and abuts the mounting plate at one end, and a rotating wheel that is mounted on the end of the L-shaped rod, with the outer wall of the rotating wheel abutting the conveyor belt. In this preferred embodiment, the driving component facilitates stable movement of the power plate, and the tension assembly ensures the effective operation of the driving component.

[0008] Preferably, the system further includes a positioning component disposed between the laser emitting tube and the scattered light receiving tube. The positioning component comprises a plurality of emitters disposed in an annular array within the laser emitting tube, a plurality of receivers disposed in an annular array within the scattered light receiving tube, two electric cylinders symmetrically disposed on the mounting plate about the drive component, and a correction rod disposed at the actuator end of each electric cylinder. In this preferred embodiment, the positioning component achieves stable positioning between the laser emitting tube and the scattered light receiving tube.

[0009] Preferably, it further includes a magnetic abutment component provided on the power plate, the magnetic abutment component including an annular frame embedded in the power plate, four first electromagnetic rings provided at the four corners of the annular frame, a pressure plate provided on the side of the annular frame close to the base plate, a guide column with one end connected to the pressure plate and the other end passing through the annular frame and the first electromagnetic ring, and a second electromagnetic ring sleeved on the outer wall of the guide column and corresponding to the position of the first electromagnetic ring, and the laser emitting tube is provided through the pressure plate; The outer walls of both the light source tube and the light receiving tube are equipped with a backflush assembly, comprising an air source ring sleeved around the outer wall of the scattered light receiving tube, with its outlet end connected to the scattered light receiving tube. In this preferred embodiment, a magnetic abutment component ensures stable abutment between the laser emitting tube and the light source tube, and between the scattered light receiving tube and the light receiving tube, preventing dust from entering the detector housing through the gap between the tubes.

[0010] Preferably, the airflow purge component includes a positioning hole formed through the base plate, a cover box provided on the outer wall of the base plate and sleeved on the outer wall of the positioning hole, two semicircular air blowing rings provided on the outer wall of the base plate and located within the cover box, and an air blowing pipe provided within the cover box, wherein the outer wall of the cover box is connected to the negative pressure pipe, and the semicircular air blowing rings and the air blowing pipe are both connected to the air source pipe via a pipeline. In this preferred embodiment, the airflow purge component is used to achieve airflow cleaning of the ends of the laser emitting tube and the heat dissipating light receiving tube.

[0011] Preferably, the airflow switching device includes two diversion pipes symmetrically arranged on both sides of the airflow pipe, a plurality of heating plates and cooling plates arranged in a linear array and staggered on the outer wall of the diversion pipe, and a dust dilution air supply pipe provided at the end of the diversion pipe and connected to the diversion pipe; Both ends of the diverter tube are connected to the airflow tube, and a switching component is provided in the airflow tube and at the connection point between the airflow tube and the diverter tube. In this preferred embodiment, the airflow diversion is achieved by the airflow switching device, so as to facilitate temperature control and dilution of the diverted gas.

[0012] Preferably, the switching component includes a horizontal plate disposed within the airflow tube, a switching plate hinged at one end to the inner wall of the airflow tube, two magnetic blocks symmetrically embedded on either side of the horizontal plate, a first electromagnetic block penetrating the side wall of the airflow tube, and a second electromagnetic block disposed on the outer wall of the horizontal plate. In this preferred embodiment, the switching component achieves airflow diversion and switching.

[0013] Preferably, a scattered light detector is provided on the inner wall of the detector housing, corresponding to the position of the light receiving tube. A laser is provided within the laser emitting tube, the laser emitting end extends through the laser emitting tube, and a lens is embedded in the end of the scattered light receiving tube. In this preferred embodiment, the scattered light detector, laser, and lens are used to detect the dust content in the airflow.

[0014] Preferably, a dust removal gas pipe and a standard gas pipe are provided on both sides of the air flow pipe near the air inlet end. Both the dust removal gas pipe and the standard gas pipe are arranged at an angle and communicate with the air flow pipe. In this preferred embodiment, the dust removal gas is introduced through the dust removal gas pipe to facilitate dust removal in the dust removal gas pipe, and the standard gas is introduced through the standard gas pipe to facilitate detection of contamination of the optical device.

[0015] According to the above technical solution of a detection device for a dust environment, a detection method for the detection device for a dust environment is also provided, comprising the following steps: Step 1: Dust detection: The suction fan is turned on, and the dust gas enters the air flow tube. The laser emitting tube corresponding to the light source tube emits laser light, and the scattered light receiving tube corresponding to the light receiving tube converges the scattered light and is received by the scattered light detector. Finally, the controller analyzes the dust data. Step 2: Clean the flow channel. After the dust detection unit time, the air inlet of the air flow pipe is closed, and the dust removal gas pipe supplies air into the air flow pipe. The air flow drives the dust in the air flow pipe to be discharged through the air flow pipe exhaust port. Step 3: Detection of contaminated optical devices: The air inlet of the air flow tube is closed, and a standard gas flow is supplied to the air flow tube through the standard gas tube. The dust data of the standard gas flow is obtained and the driving component is triggered when the data exceeds the set value to replace the laser emission tube or the scattered light receiving tube. If the dust data of the standard gas flow still exceeds the set value after replacing the laser emitting tube, the scattered light receiving tube is contaminated; If the dust data of the standard gas flow still exceeds the set value after replacing the scattered light receiving tube, the laser emitting tube is contaminated. Step 4: Clean the contaminated optical components; the driving component moves the contaminated laser emitting tube or scattered light receiving tube to the cleaning device, and the cleaning device performs the cleaning work; Step 5: Re-inspect the optical device; after cleaning is completed, the driving component resets the cleaned laser emitting tube or scattered light receiving tube, and measures the dust data of the standard gas flow. If the dust data of the standard gas flow is within the set value, the dust detection step is performed. If the dust data of the standard gas flow exceeds the set value, the contaminated optical device detection step is performed until the dust data of the standard gas flow is within the set value.

[0016] In summary, the present invention mainly has the following beneficial effects: The dust environment detection equipment of the present invention can effectively monitor dust in the air continuously, automatically clean the dust airflow channel, and self-check the optical devices and clean the optical devices contaminated by dust until the contaminated optical devices return to normal. In the detection device of the present invention, dust gas is introduced through an airflow tube, the dust content in the airflow is detected by a scattered light detector, a laser and a lens, the dust removal gas is introduced through a dust removal gas tube to remove dust from the dust removal gas tube, and the standard gas is introduced through a standard gas tube to detect whether the optical device is contaminated; In the optical detection device, the driving component facilitates the stable movement of the power plate to achieve replacement of the laser emitting tube or the scattered light receiving tube, so as to facilitate the identification of contaminated scattered light receiving tubes or laser emitting tubes. The positioning component achieves stable positioning between the laser emitting tube and the scattered light receiving tube. The magnetic abutment component achieves stable abutment between the laser emitting tube and the light source tube, and between the scattered light receiving tube and the light receiving tube, to prevent dust from moving into the detector housing through the connection gap between the tube bodies. The airflow cleaning and wiping of the laser emitting tube and the end of the heat dissipating light receiving tube are achieved through the cleaning device; The airflow switching device is used to realize the diversion of the airflow, so as to facilitate the temperature control and dilution of the diverted gas, so as to reduce the operating load of the equipment. The airflow switching device realizes the diversion switching of the airflow through the switching component. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an axonometric diagram of the overall structure of the device of the present invention; Figure 2 It is an exploded view of the overall structure of the device of the present invention; Figure 3 This is an axonometric view of the cleaning device structure of the present invention; Figure 4 This is an axonometric diagram of the airflow switching device structure of the present invention; Figure 5 This is an axonometric diagram of the airflow purge component structure of the present invention; Figure 6 This is an axonometric diagram of the optical detection device structure of the present invention; Figure 7 This is an axonometric view of the drive component structure of the present invention; Figure 8 It is a cross-sectional view of the overall structure of the device of the present invention; Figure 9 This is an enlarged view of the structure at point A of the present invention; Figure 10 This is an enlarged view of the structure at B of the present invention; Figure 11 This is an enlarged view of the structure at position C of the present invention; Figure 12 Flow chart of the detection method of the present invention.

[0018] Description of the drawings: 10. Detector housing; 11. Airflow tube; 12. Scattered light detector; 13. Laser; 14. Lens; 15. Dust removal gas tube; 16. Standard gas tube; 20. Airflow switching device; 21. Diverter tube; 22. Heating plate; 23. Refrigeration plate; 24. Dust dilution gas pipe; 25. Switching component; 251. Horizontal plate; 252. Switching plate; 253. Magnetic block; 254. First electromagnetic block; 255. Second electromagnetic block; 30. Optical detection device; 301. Light source tube; 302. Light receiving tube; 31. Mounting plate; 32. Power plate; 33. Laser emitting tube; 34. Scattered light receiving tube; 35. Driving component; 351. Positioning roller; 352. Conveyor belt; 353 , drive motor; 354, tension assembly; 3541, L-shaped rod; 3542, support spring; 3543, rotary wheel; 36, positioning component; 361, transmitter; 362, receiver; 363, electric cylinder; 364, correction rod; 37, magnetic abutment component; 371, annular frame; 372, first electromagnetic ring; 373, pressure plate; 374, guide column; 375, second electromagnetic ring; 376, back-blowing assembly; 3761, air source ring; 40, suction fan; 50, cleaning device; 51, air flow purge component; 511, positioning hole; 512, outer cover box; 513, semicircular air blowing ring; 514, air blowing pipe; 515, negative pressure pipe; 516, air source pipe; 52, wiping cloth; 53, base plate. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0020] The following describes an embodiment of the present invention based on its overall structure. Example

[0021] Please refer to the attached Figure 1 、 2, 3, 6, 7, 8, 9, 10, 11, and 12, in a preferred embodiment of the present invention, a detection device for a dust environment includes a detector housing 10, an airflow tube 11 located in the detector housing 10 and connected to the two ends of the inner wall of the detector housing 10 respectively, and an airflow switching device 20, an optical detection device 30, and a suction fan 40 sequentially arranged on the airflow tube 11 along the airflow direction, the optical detection device 30 includes a light source tube 301 and a light receiving tube 302 symmetrically arranged on both sides of the airflow tube 11 and connected to the airflow tube 11, two mounting plates 31 symmetrically arranged on both sides of the airflow tube 11, a power plate 32 slidably connected to the mounting plates 31 through a slide groove, and provided on one of them. Two laser emitting tubes 33 on the power plate 32, two scattered light receiving tubes 34 provided on another power plate 32, the outer wall of the power plate 32 extends to the outside of the slide; it also includes a driving component 35 provided on the outer wall of the mounting plate 31, the driving component 35 is used to drive the power plate 32, the driving component 35 includes two positioning rollers 351 connected to the mounting plate 31 through a bearing seat and symmetrically arranged, two transmission belts 352 symmetrically arranged between the two positioning rollers 351, and a driving motor 353 provided on the outer wall of the mounting plate 31 and used to drive one of the positioning rollers 351 to rotate, the outer wall of the transmission belt 352 is connected to the outer wall of the power plate 32; it also includes a driving component 35 provided on the outer wall of the mounting plate 31, the driving component 35 is used to drive the power plate 32, the driving component 35 includes two positioning rollers 351 connected to the mounting plate 31 through a bearing seat, the two positioning rollers 351 are symmetrically arranged, and the two transmission belts 352 are symmetrically arranged between the two positioning rollers 351, and the driving motor 353 provided on the outer wall of the mounting plate 31 and used to drive one of the positioning rollers 351 to rotate, the outer wall of the transmission belt 352 is connected to the outer wall of the power plate 32; it also includes a driving component 35 provided on the outer wall of the mounting plate The tension assembly 354 of the plate 31 includes an L-shaped rod 3541 with one end passing through the mounting plate 31, a support spring 3542 sleeved on the outside of the L-shaped rod 3541 and with one end abutting the mounting plate 31, and a rotating wheel 3543 sleeved on the end of the L-shaped rod 3541, the outer wall of the rotating wheel 3543 abutting the transmission belt 352, and also includes a positioning component 36 arranged between the laser emitting tube 33 and the scattered light receiving tube 34, the positioning component 36 includes a plurality of emitters 361 arranged in an annular array in the laser emitting tube 33, and a plurality of receivers 362 arranged in an annular array in the scattered light receiving tube 34, and is symmetrically arranged on the mounting plate 31 with the driving component 35 as the axis. 1, and a correction rod 364 provided at the execution end of the electric cylinder 363, and also includes a magnetic abutment component 37 provided on the power plate 32, the magnetic abutment component 37 includes an annular frame 371 embedded in the power plate 32, four first electromagnetic rings 372 provided at the four corners of the annular frame 371, a pressure plate 373 provided on the side of the annular frame 371 close to the base plate 53, a guide column 374 with one end connected to the pressure plate 373 and the other end passing through the annular frame 371 and the first electromagnetic ring 372, and a second electromagnetic ring 375 sleeved on the outer wall of the guide column 374 and corresponding to the position of the first electromagnetic ring 372, and the laser emitting tube 33 is provided on the pressure plate 373;The outer walls of both the light source tube 301 and the light receiving tube 302 are equipped with a backflush assembly 376. This backflush assembly 376 includes an air source ring 3761 that is sleeved around the outer wall of the scattered light receiving tube 34, with its outlet end connected to the scattered light receiving tube 34. A scattered light detector 12 is installed on the inner wall of the detector housing 10, corresponding to the position of the light receiving tube 302. A laser 13 is housed within the laser emitting tube 33, with the emitting end of the laser 13 extending through the laser emitting tube 33. A lens 14 is embedded in the end of the scattered light receiving tube 34. A dust removal gas pipe 15 and a standard gas pipe 16 are installed on both sides of the air flow tube 11 near the air inlet end. Both the dust removal gas pipe 15 and the standard gas pipe 16 are arranged at an angle and connected to the air flow tube 11.

[0022] It should be noted that, in this embodiment, when the detection device performs dust detection, the suction fan 40 is turned on, dust gas enters the airflow pipe 11, the laser 13 in the laser emitting tube 33 corresponding to the position of the light source tube 301 emits laser light, and the lens 14 in the scattered light receiving tube 34 corresponding to the position of the light receiving tube 302 converges the scattered light. The converged scattered light is received by the scattered light detector 12, and finally the controller connected to the scattered light detector 12 analyzes the scattered light to obtain dust data. After the dust detection unit time, the valve provided at the air inlet of the air flow pipe 11 is closed, so that the air inlet of the air flow pipe 11 is closed, and the dust removal gas pipe 15 supplies air into the air flow pipe 11, and the air flow drives the dust in the air flow pipe 11 to be discharged through the exhaust port of the air flow pipe 11; the air inlet end of the air flow pipe 11 is connected to the dust-free air source system through a pipeline; After the dust removal is completed, the air inlet of the air flow tube 11 is closed, and the standard gas flow is supplied to the air flow tube 11 by the standard gas pipe 16. At the same time, the dust data of the standard gas flow is obtained and the driving component 35 is triggered when the data exceeds the set value to achieve the replacement of the laser emitting tube 33 or the replacement of the scattered light receiving tube 34; the air inlet end of the standard gas pipe 16 is connected to the standard gas source system through a pipeline, and the standard gas source system can be a dust-free gas source system; If the dust data of the standard gas flow still exceeds the set value after replacing the laser emitting tube 33, the scattered light receiving tube 34 is contaminated; If the dust data of the standard gas flow still exceeds the set value after replacing the scattered light receiving tube 34, the laser emitting tube 33 is contaminated; The driving component 35 moves the contaminated laser emitting tube 33 or scattered light receiving tube 34 to the cleaning device 50, and the cleaning device 50 performs a cleaning operation; After cleaning is completed, the driving component 35 resets the cleaned laser emitting tube 33 or scattered light receiving tube 34 and measures the dust data of the standard gas flow. If the dust data of the standard gas flow is within the set value, the valve at the air inlet end of the gas flow tube 11 can be reopened to perform dust detection. If the dust data of the standard gas flow exceeds the set value, the contaminated optical device detection and cleaning will continue until the dust data of the standard gas flow is within the set value. Furthermore, the working process of replacing the laser emitting tube 33 is consistent with the working process of replacing the scattered light receiving tube 34. Taking the working process of replacing the scattered light receiving tube 34 as an example, the magnetic abutment component 37 cancels the abutment, and the execution end of the driving component 35 drives the power plate 32 to move until the other scattered light receiving tube 34 on the power plate 32 moves to a position corresponding to the light receiving tube 302. The controller receives the positioning information measured by the positioning component 36 and triggers the driving component 35 and the electric cylinder 363 until the position of the other scattered light receiving tube 34 corresponds to the position of the laser emitting tube 33. The magnetic abutment component 37 resumes the abutment to complete the replacement work. Furthermore, when the driving component 35 is working, the actuator end of the driving motor 353 drives the positioning roller 351 to rotate, and the positioning roller 351 drives the power plate 32 to move through the transmission belt 352. The support spring 3542 provides elastic support force to the L-shaped rod 3541, and the L-shaped rod 3541 provides support force to the transmission belt 352 through the rotating wheel 3543, so that the transmission belt 352 maintains tension. Furthermore, when the positioning component 36 is working, the transmitter 361 transmits laser light, the receiver 362 receives the laser light emitted by the transmitter 361, the controller receives the laser light information received by the receiver 362, and triggers the driving component 35 and the electric cylinder 363 according to the laser light information until all the receivers 362 receive the laser light information. Since the power plate 32 is slidably connected to the mounting plate 31 through the chute on the mounting plate 31, when the power plate 32 slides in the chute, it will be partially offset due to the gap in the chute. The actuator end of the electric cylinder 363 drives the correction rod 364 to move, and the correction rod 364 drives the power plate 32 to move, so as to correct the deviation of the power plate 32. Furthermore, when the magnetic abutment component 37 is working, the air source ring 3761 is connected to the dust-free air source system through a pipeline, the dust-free air source system is turned on, and the dust-free gas is discharged through the exhaust end of the air source ring 3761 to blow out dust from the light source tube 301 or the light receiving tube 302. When the first electromagnetic ring 372 and the second electromagnetic ring 375 are both energized to generate a like repulsive force, the repulsive force pushes the pressure plate 373 to abut against the base plate 53. When the first electromagnetic ring 372 and the second electromagnetic ring 375 are both energized to generate an opposite attractive force, the attractive force drives the pressure plate 373 to move to cancel the abutting pressure between the base plate 53.

[0023] Please refer to the attached Figure 3 、 5 As shown, in another preferred embodiment of the present invention, it also includes two cleaning devices 50 symmetrically arranged on both sides of the airflow tube 11, the cleaning device 50 includes a base plate 53 provided on the outer wall of the airflow tube 11 and sleeved on the outside of the light receiving tube 302, an airflow blowing component 51 and a wiping cloth 52 symmetrically provided on the base plate 53 with the light receiving tube 302 as the axis, the airflow blowing component 51 includes a positioning hole 511 passing through the base plate 53, an outer cover box 512 provided on the outer wall of the base plate 53 and sleeved on the outer wall of the positioning hole 511, two semicircular air blowing rings 513 provided on the outer wall of the base plate 53 and located in the outer cover box 512, and an air blowing pipe 514 provided in the outer cover box 512, the outer wall of the outer cover box 512 is connected to the negative pressure pipe 515, and the semicircular air blowing rings 513 and the air blowing pipe 514 are both connected to the air source pipe 516 through a pipeline.

[0024] It should be noted that, in this embodiment, when the cleaning device 50 is in operation, the laser emitting tube 33 and the scattered light receiving tube 34 are cleaned in the same manner. Taking the cleaning of the scattered light receiving tube 34 as an example, the driving component 35 drives the scattered light receiving tube 34 to move to the airflow purge component 51, and the airflow purge component 51 cleans the end of the scattered light receiving tube 34. The driving component 35 drives the scattered light receiving tube 34 to move past the wiping cloth 52, and the wiping cloth 52 cleans the end of the scattered light receiving tube 34. Furthermore, the end of the air source pipe 516 is connected to the dust-free air source system, and the end of the negative pressure pipe 515 is connected to the negative pressure system. The valves on the air source pipe 516 corresponding to the air blowing pipe 514 and the two semicircular air blowing rings 513 are opened in sequence. The air blowing pipe 514 and the two semicircular air blowing rings 513 perform air blowing in sequence, and the dust at the end of the scattered light receiving tube 34 is discharged through the negative pressure pipe 515. The semicircular air blowing ring 513 is convenient for removing dust particles at the edge of the end of the scattered light receiving tube 34 , and the air blowing pipe 514 is convenient for removing dust particles at the center of the end of the scattered light receiving tube 34 .

[0025] Please refer to the attached Figure 2 、 4As shown in , 8, in another preferred embodiment of the present invention, the airflow switching device 20 includes two diversion pipes 21 symmetrically arranged on both sides of the airflow pipe 11, a plurality of heating plates 22 and cooling plates 23 arranged in a linear array on the outer wall of the diversion pipe 21 and staggered, and a dust dilution air supply pipe 24 provided at the end of the diversion pipe 21 and connected to the diversion pipe 21; both ends of the diversion pipe 21 are connected to the airflow pipe 11, and a switching component 25 is provided in the airflow pipe 11 and at the connection between the airflow pipe 11 and the diversion pipe 21, the switching component 25 includes a horizontal plate 251 provided in the airflow pipe 11, a switching plate 252 hinged to the inner wall of the airflow pipe 11 at one end, two magnetic blocks 253 symmetrically embedded on both sides of the horizontal plate 251, a first electromagnetic block 254 passing through the side wall of the airflow pipe 11, and a second electromagnetic block 255 provided on the outer wall of the horizontal plate 251.

[0026] It should be noted that, in this embodiment, the controller receives temperature information from a temperature sensor provided in the airflow pipe 11, and triggers the airflow switching device 20 when the temperature information is greater than a set value or the dust data during dust detection is greater than a set value. When the airflow switching device 20 is working, the switching component 25 is turned on, and the dust gas enters the shunt pipe 21. The dust dilution air supply pipe 24 can be connected to the dust-free air source system. The dust-free air source system is connected to the shunt pipe 21 through the dust dilution air supply pipe 24 to input dust-free gas at a set flow rate to dilute the dust gas. After the heating plate 22 or the cooling plate 23 is turned on, the airflow passing through the shunt pipe 21 is heated or cooled by thermal radiation. Furthermore, when the shunt tube 21 is opened, the first electromagnetic block 254 is energized to generate a repulsive force of the same polarity as the magnetic block 253, and the second electromagnetic block 255 is energized to generate an attractive force of the opposite polarity to the magnetic block 253, so that the switching plate 252 rotates to open the shunt tube 21; The first electromagnetic block 254 is energized to generate an attraction force of opposite polarity with the magnetic block 253 , and the second electromagnetic block 255 is energized to generate a repulsion force of the same polarity with the magnetic block 253 , so that the switching plate 252 rotates and resets.

[0027] According to the above embodiment, a detection method for a detection device for a dust environment is also provided, comprising the following steps: Step 1: Dust detection: The suction fan 40 is turned on, and the dust gas enters the air flow tube 11. The laser emitting tube 33 corresponding to the light source tube 301 emits laser light, and the scattered light receiving tube 34 corresponding to the light receiving tube 302 converges the scattered light and is received by the scattered light detector 12. Finally, the controller analyzes the dust data. Step 2: Clean the flow channel; after the dust detection unit time, the air inlet of the air flow tube 11 is closed, and the dust removal gas pipe 15 supplies air to the air flow tube 11, and the air flow drives the dust in the air flow tube 11 to be discharged through the exhaust port of the air flow tube 11; Step 3: Detecting contaminated optical devices; the air inlet of the airflow tube 11 is closed, and the standard gas flow is supplied to the airflow tube 11 through the standard gas pipe 16. The dust data of the standard gas flow is obtained and the driving component 35 is triggered when the data exceeds the set value to replace the laser emitting tube 33 or the scattered light receiving tube 34; If the dust data of the standard gas flow still exceeds the set value after replacing the laser emitting tube 33, the scattered light receiving tube 34 is contaminated; If the dust data of the standard gas flow still exceeds the set value after replacing the scattered light receiving tube 34, the laser emitting tube 33 is contaminated. Step 4: Cleaning of contaminated optical devices; the driving component 35 moves the contaminated laser emitting tube 33 or scattered light receiving tube 34 to the cleaning device 50, and the cleaning device 50 performs cleaning work; Step 5: Re-inspect the optical device; after cleaning is completed, the driving component 35 resets the cleaned laser emitting tube 33 or scattered light receiving tube 34, and measures the dust data of the standard gas flow. If the dust data of the standard gas flow is within the set value, the dust detection step is performed. If the dust data of the standard gas flow exceeds the set value, the contaminated optical device detection step is performed until the dust data of the standard gas flow is within the set value.

[0028] The working principle of the present invention is: The electrical components in the present invention are all triggered to operate by the controller; When the detection equipment performs dust detection, the suction fan 40 is turned on, and dust gas enters the airflow pipe 11. The laser 13 in the laser emitting tube 33 corresponding to the position of the light source tube 301 emits laser light, and the lens 14 in the scattered light receiving tube 34 corresponding to the position of the light receiving tube 302 converges the scattered light. The converged scattered light is received by the scattered light detector 12, and finally the controller connected to the scattered light detector 12 analyzes the scattered light to obtain dust data. After the dust detection unit time, the valve provided at the air inlet of the air flow pipe 11 is closed, so that the air inlet of the air flow pipe 11 is closed, and the dust removal gas pipe 15 supplies air into the air flow pipe 11, and the air flow drives the dust in the air flow pipe 11 to be discharged through the exhaust port of the air flow pipe 11; the air inlet end of the air flow pipe 11 is connected to the dust-free air source system through a pipeline; After the dust removal is completed, the air inlet of the air flow tube 11 is closed, and the standard gas flow is supplied to the air flow tube 11 by the standard gas pipe 16. At the same time, the dust data of the standard gas flow is obtained and the driving component 35 is triggered when the data exceeds the set value to achieve the replacement of the laser emitting tube 33 or the replacement of the scattered light receiving tube 34; the air inlet end of the standard gas pipe 16 is connected to the standard gas source system through a pipeline, and the standard gas source system can be a dust-free gas source system; If the dust data of the standard gas flow still exceeds the set value after replacing the laser emitting tube 33, the scattered light receiving tube 34 is contaminated; If the dust data of the standard gas flow still exceeds the set value after replacing the scattered light receiving tube 34, the laser emitting tube 33 is contaminated; The driving component 35 moves the contaminated laser emitting tube 33 or scattered light receiving tube 34 to the cleaning device 50, and the cleaning device 50 performs a cleaning operation; After cleaning is completed, the driving component 35 resets the cleaned laser emitting tube 33 or scattered light receiving tube 34 and measures the dust data of the standard gas flow. If the dust data of the standard gas flow is within the set value, the valve at the air inlet end of the gas flow tube 11 can be reopened to perform dust detection. If the dust data of the standard gas flow exceeds the set value, the contaminated optical device detection and cleaning will continue until the dust data of the standard gas flow is within the set value. The working process of replacing the laser emitting tube 33 is consistent with the working process of replacing the scattered light receiving tube 34. Taking the working process of replacing the scattered light receiving tube 34 as an example, the magnetic abutment component 37 cancels the abutment, and the actuator end of the driving component 35 drives the power plate 32 to move until the other scattered light receiving tube 34 on the power plate 32 moves to a position corresponding to the light receiving tube 302. The controller receives the positioning information measured by the positioning component 36 and triggers the driving component 35 and the electric cylinder 363 until the position of the other scattered light receiving tube 34 corresponds to the position of the laser emitting tube 33. The magnetic abutment component 37 resumes the abutment, completing the replacement work. When the driving component 35 is working, the actuator end of the driving motor 353 drives the positioning roller 351 to rotate, and the positioning roller 351 drives the power plate 32 to move through the transmission belt 352. The support spring 3542 provides elastic support force to the L-shaped rod 3541, and the L-shaped rod 3541 provides support force to the transmission belt 352 through the rotating wheel 3543, so that the transmission belt 352 maintains tension. When the positioning component 36 is working, the transmitter 361 emits laser light, and the receiver 362 receives the laser light emitted by the transmitter 361. The controller receives the laser light information received by the receiver 362 and triggers the driving component 35 and the electric cylinder 363 according to the laser light information until all the receivers 362 receive the laser light information. Since the power plate 32 is slidably connected to the mounting plate 31 through the chute on the mounting plate 31, when the power plate 32 slides in the chute, it will be partially offset due to the gap in the chute. The actuator end of the electric cylinder 363 drives the correction rod 364 to move, and the correction rod 364 drives the power plate 32 to move, so as to correct the deviation of the power plate 32. When the magnetic abutment component 37 is working, the air source ring 3761 is connected to the dust-free air source system through a pipeline. The dust-free air source system is turned on, and the dust-free gas is discharged through the exhaust end of the air source ring 3761 to blow and remove dust from the light source tube 301 or the light receiving tube 302. When the first electromagnetic ring 372 and the second electromagnetic ring 375 are both energized to generate a like repulsive force, the repulsive force pushes the pressure plate 373 to abut against the base plate 53. When the first electromagnetic ring 372 and the second electromagnetic ring 375 are both energized to generate an opposite attractive force, the attractive force drives the pressure plate 373 to move to cancel the abutting pressure between the pressure plate 373 and the base plate 53. When the cleaning device 50 is in operation, the laser emitting tube 33 and the scattered light receiving tube 34 are cleaned in the same manner. Taking the cleaning of the scattered light receiving tube 34 as an example, the driving component 35 drives the scattered light receiving tube 34 to move to the airflow purge component 51, and the airflow purge component 51 cleans the end of the scattered light receiving tube 34. The driving component 35 drives the scattered light receiving tube 34 to move past the wiping cloth 52, and the wiping cloth 52 cleans the end of the scattered light receiving tube 34. The end of the air source pipe 516 is connected to the dust-free air source system, and the end of the negative pressure pipe 515 is connected to the negative pressure system. The valves on the air source pipe 516 corresponding to the air blowing pipe 514 and the two semicircular air blowing rings 513 are opened in sequence. The air blowing pipe 514 and the two semicircular air blowing rings 513 perform air blowing in sequence, and the dust at the end of the scattered light receiving tube 34 is discharged through the negative pressure pipe 515. The semicircular air blowing ring 513 facilitates the removal of dust particles at the edge of the end of the scattered light receiving tube 34, and the air blowing pipe 514 facilitates the removal of dust particles at the center of the end of the scattered light receiving tube 34; The controller receives temperature information from a temperature sensor provided in the airflow pipe 11, and triggers the airflow switching device 20 when the temperature information is greater than a set value or the dust data during dust detection is greater than a set value. When the airflow switching device 20 is working, the switching component 25 is turned on, and the dust gas enters the shunt pipe 21. The dust dilution air supply pipe 24 can be connected to the dust-free air source system. The dust-free air source system is connected to the shunt pipe 21 through the dust dilution air supply pipe 24 to input dust-free gas at a set flow rate to dilute the dust gas. After the heating plate 22 or the cooling plate 23 is turned on, the airflow passing through the shunt pipe 21 is heated or cooled by thermal radiation. When the shunt tube 21 is opened, the first electromagnetic block 254 is energized to generate a repulsive force with the same polarity as the magnetic block 253, and the second electromagnetic block 255 is energized to generate an attractive force with the opposite polarity as the magnetic block 253, so that the switching plate 252 rotates to open the shunt tube 21; The first electromagnetic block 254 is energized to generate an attraction force of opposite polarity with the magnetic block 253 , and the second electromagnetic block 255 is energized to generate a repulsion force of the same polarity with the magnetic block 253 , so that the switching plate 252 rotates and resets.

[0029] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A detection device for a dust environment, comprising a detector housing (10), an airflow tube (11) located in the detector housing (10) and having two ends connected to the inner wall of the detector housing (10), and an airflow switching device (20), an optical detection device (30), and a suction fan (40) arranged in sequence on the airflow tube (11) along the airflow direction, characterized in that The optical detection device (30) includes a light source tube (301) and a light receiving tube (302) symmetrically arranged on both sides of the airflow tube (11) and connected to the airflow tube (11), two mounting plates (31) symmetrically arranged on both sides of the airflow tube (11), a power plate (32) slidably connected to the mounting plate (31) through a slide groove, two laser emitting tubes (33) arranged on one of the power plates (32), and two scattered light receiving tubes (34) arranged on the other power plate (32), and the outer wall of the power plate (32) extends to the outside of the slide groove; It also includes two cleaning devices (50) symmetrically arranged on both sides of the airflow tube (11), the cleaning device (50) including a base plate (53) arranged on the outer wall of the airflow tube (11) and sleeved on the outside of the light receiving tube (302), an airflow blowing component (51) and a wiping cloth (52) symmetrically arranged on the base plate (53) with the light receiving tube (302) as the axis.

2. A dust environment detection device according to claim 1, characterized in that: The drive unit (35) further comprises a driving component (35) disposed on the outer wall of the mounting plate (31), the driving component (35) being used to drive the power plate (32), the driving component (35) comprising two positioning rollers (351) connected to the mounting plate (31) via a bearing seat and symmetrically arranged, two transmission belts (352) sleeved between the two positioning rollers (351) and symmetrically arranged, and a driving motor (353) disposed on the outer wall of the mounting plate (31) and used to drive one of the positioning rollers (351) to rotate, the outer wall of the transmission belt (352) being connected to the outer wall of the power plate (32); The invention also includes a tension assembly (354) passing through the mounting plate (31), wherein the tension assembly (354) includes an L-shaped rod (3541) with one end passing through the mounting plate (31), a support spring (3542) sleeved on the outside of the L-shaped rod (3541) and with one end abutting against the mounting plate (31), and a rotating wheel (3543) sleeved on the end of the L-shaped rod (3541), wherein the outer wall of the rotating wheel (3543) abuts against the conveyor belt (352).

3. The dust environment detection device according to claim 2, characterized in that: The invention also includes a positioning component (36) disposed between the laser emitting tube (33) and the scattered light receiving tube (34), wherein the positioning component (36) includes a plurality of emitters (361) disposed in a circular array in the laser emitting tube (33), and a plurality of receivers (362) disposed in a circular array in the scattered light receiving tube (34), two electric cylinders (363) symmetrically disposed on the mounting plate (31) with the driving component (35) as an axis, and a correction rod (364) disposed at the execution end of the electric cylinder (363).

4. The dust environment detection device according to claim 1, characterized in that: It also includes a magnetically abutting component (37) provided on the power plate (32), the magnetically abutting component (37) including an annular frame (371) embedded in the power plate (32), four first electromagnetic rings (372) provided at four corners of the annular frame (371), a pressure plate (373) provided on the side of the annular frame (371) close to the base plate (53), a guide column (374) having one end connected to the pressure plate (373) and the other end passing through the annular frame (371) and the first electromagnetic ring (372), and a second electromagnetic ring (375) sleeved on the outer wall of the guide column (374) and corresponding to the position of the first electromagnetic ring (372), and the laser emitting tube (33) passing through the pressure plate (373); The outer walls of the light source tube (301) and the light receiving tube (302) are both provided with a backflush assembly (376), and the backflush assembly (376) comprises an air source ring (3761) sleeved on the outer wall of the scattered light receiving tube (34) and having an air outlet end connected to the scattered light receiving tube (34).

5. The dust environment detection device according to claim 1, characterized in that: The airflow blowing component (51) includes a positioning hole (511) passing through the base plate (53), an outer cover box (512) provided on the outer wall of the base plate (53) and sleeved on the outer wall of the positioning hole (511), two semicircular air blowing rings (513) provided on the outer wall of the base plate (53) and located inside the outer cover box (512), and an air blowing pipe (514) provided inside the outer cover box (512), the outer wall of the outer cover box (512) is connected to the negative pressure pipe (515), and the semicircular air blowing rings (513) and the air blowing pipe (514) are both connected to the air source pipe (516) through a pipeline.

6. The dust environment detection device according to claim 1, characterized in that: The airflow switching device (20) comprises two diversion pipes (21) symmetrically arranged on both sides of the airflow pipe (11), a plurality of heating fins (22) and cooling fins (23) arranged in a linear array and staggered on the outer wall of the diversion pipe (21), and a dust dilution air delivery pipe (24) arranged at the end of the diversion pipe (21) and in communication with the diversion pipe (21); Both ends of the diverter pipe (21) are in communication with the airflow pipe (11), and a switching component (25) is provided in the airflow pipe (11) and at the connection point between the airflow pipe (11) and the diverter pipe (21).

7. The dust environment detection device according to claim 6, characterized in that: The switching component (25) includes a horizontal plate (251) arranged in the airflow tube (11), a switching plate (252) hinged at one end to the inner wall of the airflow tube (11), two magnetic blocks (253) symmetrically embedded on both sides of the horizontal plate (251), a first electromagnetic block (254) passing through the side wall of the airflow tube (11), and a second electromagnetic block (255) arranged on the outer wall of the horizontal plate (251).

8. The dust environment detection device according to claim 1, characterized in that: A scattered light detector (12) corresponding to the position of the light receiving tube (302) is provided on the inner wall of the detector housing (10), a laser (13) is provided in the laser emitting tube (33), an emitting end of the laser (13) passes through the laser emitting tube (33), and a lens (14) is embedded in the end of the scattered light receiving tube (34).

9. The dust environment detection device according to claim 1, characterized in that: A dust removal gas pipe (15) and a standard gas pipe (16) are provided on both sides of the air flow pipe (11) close to the air inlet end. The dust removal gas pipe (15) and the standard gas pipe (16) are both arranged at an angle and communicated with the air flow pipe (11).

10. A detection method for a dust environment detection device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Dust detection: The suction fan (40) is turned on, and the dust gas enters the air flow tube (11). The laser emitting tube (33) corresponding to the light source tube (301) emits laser light, and the scattered light receiving tube (34) corresponding to the light receiving tube (302) converges the scattered light, and the scattered light detector (12) receives the scattered light. Finally, the controller analyzes the dust data. Step 2: Cleaning the flow channel; After the dust detection unit time, the air inlet of the air flow pipe (11) is closed, and the dust removal gas pipe (15) supplies air flow into the air flow pipe (11), and the air flow drives the dust in the air flow pipe (11) to be discharged through the exhaust port of the air flow pipe (11); Step 3: Detection of contaminated optical devices; the air inlet of the airflow tube (11) is closed, and a standard gas flow is supplied to the airflow tube (11) through the standard gas tube (16), dust data of the standard gas flow is obtained, and when the data exceeds a set value, the driving component (35) is triggered to achieve replacement of the laser emitting tube (33) or replacement of the scattered light receiving tube (34); If the dust data of the standard gas flow still exceeds the set value after replacing the laser emitting tube (33), the scattered light receiving tube (34) is contaminated; If the dust data of the standard gas flow still exceeds the set value after replacing the scattered light receiving tube (34), the laser emitting tube (33) is contaminated. Step 4: Cleaning the contaminated optical device; the driving component (35) moves the contaminated laser emitting tube (33) or scattered light receiving tube (34) to the cleaning device (50), and the cleaning device (50) performs a cleaning operation; Step 5: Re-inspection of the optical device; after the cleaning is completed, the driving component (35) resets the cleaned laser emitting tube (33) or scattered light receiving tube (34), and measures the dust data of the standard gas flow. If the dust data of the standard gas flow is within the set value, the dust detection step is performed. If the dust data of the standard gas flow exceeds the set value, the contaminated optical device detection step is performed until the dust data of the standard gas flow is within the set value.

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