Dust collecting device for occupational health detection

Abstract

The utility model relates to the technical field of dust collection, and discloses a dust collection device for occupational health detection, which comprises a box body and a frame plate arranged in the center of the box body, a screen is arranged in the center of the frame plate, and an air deflector and an air suction plate are respectively and additionally arranged on two sides of the screen; a dust collection head is arranged outside the box body, the air outlet end of the dust collection head is communicated with an air inlet pipe, the air outlet end of the air suction plate is communicated with an exhaust pipe, and a suction fan is installed outside the box body; guide rods and screws are arranged on the two sides of an inner cavity of the box respectively, belt wheels are installed at the bottom ends of the screws, a transmission belt is installed between the belt wheels, and a driving motor is installed on the upper portion of the box. Connecting blocks are arranged on the two sides of the air guide plate and the air suction plate; the device can drive the screw rod to rotate through the driving motor, so that the connecting block drives the air guide plate and the air suction plate to lift and adjust the corresponding positions of the air guide plate and the air suction plate and the screen, the situation that other parts cannot play a filtering role after the screen is partially blocked is avoided, and the filtering comprehensiveness of the screen is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of dust collection technology, specifically a dust collection device for occupational health testing. Background Technology

[0002] Dust collection devices are commonly used in occupational health monitoring in various workplaces to capture dust particles in the environment and collect samples, providing a basis for subsequent dust concentration analysis and hazard assessment, and helping to ensure the safety management and hygiene standards of the work environment.

[0003] In existing dust collection devices, the air guide plates and suction plates are mostly fixedly installed, and their relative positions to the screen cannot be adjusted. When the screen becomes partially blocked, the fixed air guide plates and suction plates will still direct the dust airflow to the blocked area, preventing the unblocked areas of the screen from filtering and affecting the overall filtration efficiency. Furthermore, existing devices often directly connect the dust airflow to the screen via ductwork, lacking a corresponding air guiding structure. This results in insufficient stability of the dust airflow as it passes through the screen, easily leading to airflow turbulence and poor transport, thus affecting the dust filtration and collection efficiency. Therefore, a dust collection device for occupational health testing is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a dust collection device for occupational health testing, thereby solving the aforementioned technical problems affecting the comprehensiveness of screen filtration and the dust filtration and collection effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dust collection device for occupational health testing, comprising:

[0006] The box body, and a frame plate set in the center of the box body, with a screen installed in the center of the frame plate, and a guide plate and a suction plate respectively added on both sides of the screen, the air outlet end of the guide plate and the air inlet end of the suction plate correspond to each other.

[0007] A vacuum cleaner head is located outside the housing, and the air outlet of the vacuum cleaner head is connected to an air inlet pipe. The air outlet of the air inlet pipe extends inward through the housing and connects to the air inlet of the air guide plate. An exhaust pipe is connected to the air outlet of the air suction plate. A vacuum fan is installed on the outside of the housing on the opposite side of the vacuum cleaner head. The air outlet of the exhaust pipe is connected to the air inlet of the vacuum fan.

[0008] The guide rod and the screw are respectively set on both sides of the inner cavity of the box, and the bottom end of the screw is equipped with a pulley, and a transmission belt is installed between the pulleys. The upper part of the box is equipped with a drive motor and a controller, and the drive motor is coaxially connected to the top end of the screw.

[0009] Connecting blocks are set on both sides of the air guide plate and the air suction plate. The connecting blocks are respectively sleeved on the surface of the guide rod and threaded onto the surface of the screw rod. A dust discharge port is opened in the lower part of the inner cavity of the box, and a dust collection box is installed at the discharge end of the dust discharge port.

[0010] A lifting electric rod is installed on the top of the box, and the lifting end of the lifting electric rod passes through the box and is connected to a dust scraper. The dust scraper slides against the air inlet surface of the screen, and the position of the dust scraper corresponds to the dust outlet.

[0011] During operation, the controller first starts the drive motor and the suction fan. After the suction fan starts, it generates negative pressure suction. This suction is transmitted to the suction plate through the exhaust pipe, creating a negative pressure environment at the air inlet of the suction plate. Under the action of negative pressure, dusty gas from the outside enters through the dust suction head and is then transported to the air guide plate through the air inlet pipe. After being guided by the air guide plate, the gas flows smoothly to the screen. The dust in the gas is intercepted and filtered by the screen. The filtered gas passes through the screen and enters the suction plate, and is then transported to the suction fan through the exhaust pipe. Finally, the suction fan discharges the gas outside the device.

[0012] During the collection process, if there is a tendency for the screen to become clogged in some areas, the controller will control the drive motor to run. The drive motor will drive the screw to rotate. The screw will rotate synchronously on both sides through the cooperation of the pulley and the transmission belt. Under the action of the screw rotation, the connecting block will move up and down along the guide rod, which will in turn drive the air guide plate and the suction plate to move up and down synchronously. This will adjust the corresponding position of the air guide plate and the suction plate with the screen, so as to avoid the situation where some parts of the screen are clogged and other parts cannot perform the filtering function.

[0013] When the dust collection is completed or when there is a large amount of dust accumulation on the screen surface, the controller controls the operation of the lifting electric rod. The lifting electric rod drives the dust scraper to slide vertically downward along the air inlet surface of the screen. During the sliding process, the dust scraper pushes against the triangular block at the dust discharge port, causing it to move downward, opening the dust discharge port, and scraping off the dust intercepted on the screen surface. The scraped-off dust falls into the dust collection box through the dust discharge port, completing the dust collection and screen cleaning. After cleaning is completed, all electrical components can be turned off.

[0014] Preferably, sealing protrusions are installed on all four sides of the outer side of the frame plate, and the frame plate is connected to the housing through the sealing protrusions in a sealing manner. The sealing protrusions can fill the connection gap between the frame plate and the housing, improve the sealing performance of the connection between the two, prevent external impurities from entering the connection between the frame plate and the housing, and prevent the medium in the inner cavity of the housing from leaking from the connection, thus ensuring the sealing stability of the overall structure.

[0015] Preferably, the top of the enclosure has a replacement slot, and the frame plate is inserted into the inner cavity of the enclosure through the replacement slot. A sealing plate is inserted and connected to the inner cavity of the replacement slot. The replacement slot provides a convenient passage for the installation and removal of the frame plate, facilitating subsequent maintenance or replacement of the frame plate without disassembling the overall enclosure structure. The sealing plate seals the replacement slot, preventing external impurities from entering the inner cavity of the enclosure through the replacement slot, further improving the enclosure's sealing performance.

[0016] Preferably, the upper side of the sealing plate is provided with a lifting buckle groove, and the bottom of the box is rotatably connected with self-locking casters. The lifting buckle groove provides a force point for lifting and disassembling the sealing plate, reducing the difficulty of disassembling the sealing plate and improving the convenience of operation; the self-locking casters can realize the flexible movement and stable fixation of the box, eliminating the need for manual handling of the box, saving manpower, and facilitating the switching of the equipment between different usage positions.

[0017] Preferably, the inner cavity of the air guide plate is equipped with a flow-dividing air plate, and the surface of the flow-dividing air plate is uniformly provided with flow-dividing holes. The flow-dividing air plate can divert and guide the airflow passing through the air guide plate. The uniformly provided flow-dividing holes can make the airflow diversion more uniform, avoid the airflow from concentrating and impacting a certain area, improve the uniformity of airflow action, optimize the airflow state, and ensure the stability of airflow transmission.

[0018] Preferably, the exterior of the housing is equipped with a snap-fit ​​plate, and the surface of the snap-fit ​​plate has snap-fit ​​grooves. Symmetrical elastic snap heads are installed on the surface of each snap-fit ​​groove, and the vacuum cleaner head is snapped into the snap-fit ​​plate through the snap-fit ​​grooves and elastic snap heads. The snap-fit ​​plate, snap-fit ​​grooves, and elastic snap heads work together to stably and securely hold the vacuum cleaner head, enabling convenient storage of the vacuum cleaner head and preventing damage, loss, or tangling caused by careless placement. It also facilitates subsequent retrieval of the vacuum cleaner head, improving the ease of use of the equipment.

[0019] Preferably, the dust discharge port has a convex design that is smaller at the top and larger at the bottom, and a triangular blocking plate is slidably fitted onto the upper part of the inner cavity of the dust discharge port. The triangular blocking plate is located directly below the dust scraper, and sliding blocks are installed on both sides of the triangular blocking plate. The convex design that is smaller at the top and larger at the bottom guides the dust to be discharged smoothly downwards, avoiding dust accumulation in the inner cavity of the dust discharge port and improving the smoothness of dust discharge. The triangular blocking plate can flexibly control the opening and closing of the dust discharge port. When closed, it can prevent external impurities from entering the dust discharge port. At the same time, the triangular blocking plate is located directly below the dust scraper, which can accurately catch the dust scraped off by the dust scraper, further improving the dust discharge efficiency.

[0020] Preferably, the inner wall of the dust discharge port is provided with a sliding groove, and the sliding block slides against the upper part of the inner cavity of the sliding groove. A return spring is installed in the inner cavity of the sliding groove, and the top and bottom of the return spring elastically abut against the lower part of the sliding block and the lower part of the inner cavity of the sliding groove, respectively. The sliding groove provides a stable sliding trajectory for the sliding block, ensuring smooth sliding of the triangular blocking plate and preventing the triangular blocking plate from deviating during sliding. The return spring can realize the automatic reset of the sliding block and the triangular blocking plate, eliminating the need for manual reset of the triangular blocking plate, improving the convenience of operation, and ensuring that the triangular blocking plate fits tightly against the dust discharge port when closed, ensuring the sealing of the dust discharge port after closure.

[0021] Compared with the prior art, this utility model provides a dust collection device for occupational health testing, which has the following beneficial effects:

[0022] This dust collection device for occupational health testing uses a drive motor to rotate a screw. The connecting block, in conjunction with the guide rod and the screw, can raise and lower the air guide plate and the suction plate, adjusting their corresponding positions with the screen to prevent some parts of the screen from becoming clogged and other parts from failing to perform their filtering function, thus ensuring the comprehensiveness of the screen's filtration.

[0023] When the suction fan is working, it generates suction. The dust collected by the suction head enters the air guide plate through the air inlet pipe. The air outlet of the air guide plate corresponds to the air inlet of the suction plate, which can guide the dust airflow to pass through the screen stably, realize the effective filtration and collection of dust, and ensure the smoothness of the collection process.

[0024] The lifting electric rod can drive the dust scraper to slide along the air inlet surface of the screen, which can scrape off the dust attached to the screen. The scraped dust enters the dust collection box through the dust discharge port, which facilitates the collection and cleaning of the collected dust and further reduces the clogging of the screen. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the overall right-side view of the present invention;

[0027] Figure 3 This is a cross-sectional view of the internal structure of the box body of this utility model;

[0028] Figure 4 This is a schematic diagram of the frame plate and its connection structure of the present utility model;

[0029] Figure 5 This is a cross-sectional view of the dust discharge port and a schematic diagram of its connection structure of the present invention;

[0030] Figure 6 Appendix to this utility model Figure 5 Enlarged structural diagram at point A in the middle.

[0031] In the diagram: 1. Housing; 2. Frame plate; 3. Sealing convex plate; 4. Screen; 5. Air guide plate; 6. Diverting air plate; 7. Air inlet pipe; 8. Dust suction head; 9. Suction plate; 10. Exhaust pipe; 11. Fan; 12. Clip plate; 13. Elastic clip; 14. Guide rod; 15. Screw; 16. Pulley; 17. Transmission belt; 18. Drive motor; 19. Connecting block; 20. Lifting electric rod; 21. Dust scraper; 22. Dust outlet; 23. Triangular blocking plate; 24. Sliding block; 25. Sliding groove; 26. Return spring; 27. Dust collection box; 28. Controller; 29. ​​Sealing plate; 30. Self-locking caster wheel. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] This utility model provides a technical solution: a dust collection device for occupational health testing, comprising: (See details) Figures 1-6 The box body 1 and the frame plate 2 set in the center of the inner cavity of the box body 1, and the frame plate 2 is equipped with a screen 4 in the center of the frame plate 2, and the air guide plate 5 and the air suction plate 9 are respectively added on both sides of the screen 4, with the air outlet end of the air guide plate 5 corresponding to the air inlet end of the air suction plate 9.

[0034] A vacuum head 8 is located outside the housing 1, and the air outlet of the vacuum head 8 is connected to an air inlet pipe 7. The air outlet of the air inlet pipe 7 extends inward through the housing 1 and connects to the air inlet of the air guide plate 5. An exhaust pipe 10 is connected to the air outlet of the suction plate 9. A suction fan 11 is installed on the outside of the housing 1 on the opposite side of the vacuum head 8. The air outlet of the exhaust pipe 10 is connected to the air inlet of the suction fan 11.

[0035] Guide rod 14 and screw 15 are respectively set on both sides of the inner cavity of housing 1, and a pulley 16 is installed at the bottom end of screw 15, and a transmission belt 17 is installed between the pulleys 16. A drive motor 18 and a controller 28 are respectively installed on the upper part of housing 1, and the drive motor 18 is coaxially connected to the top end of screw 15.

[0036] Connecting blocks 19 are set on both sides of the air guide plate 5 and the suction plate 9. The connecting blocks 19 are respectively sleeved on the surface of the guide rod 14 and threaded onto the surface of the screw rod 15. A dust discharge port 22 is opened in the lower part of the inner cavity of the box 1, and a dust collection box 27 is installed at the discharge end of the dust discharge port 22.

[0037] The lifting electric rod 20 is set on the top of the box 1, and the lifting end of the lifting electric rod 20 passes through the box 1 and is connected to the dust scraper 21. The dust scraper 21 slides against the air inlet surface of the screen 4, and the dust scraper 21 corresponds to the position of the dust outlet 22.

[0038] By cooperating with the suction fan 11, dust suction head 8, air inlet pipe 7, air guide plate 5, suction plate 9 and exhaust pipe 10, a stable airflow channel can be formed to ensure that the dust-containing gas from the outside enters the device smoothly and efficiently. The dust is intercepted by the screen 4, realizing the accurate collection of dust in occupational health testing, ensuring the stability and reliability of dust collection, and meeting the needs of occupational health testing.

[0039] With the help of the drive motor 18, screw 15, guide rod 14, connecting block 19, pulley 16 and transmission belt 17, the air guide plate 5 and suction plate 9 can be driven to rise and fall synchronously, and the corresponding positions of the two and the screen 4 can be flexibly adjusted to effectively avoid the screen 4 from being partially blocked and affecting the overall filtration and collection effect, and ensure the continuous and stable operation of the device.

[0040] The lifting electric rod 20 and the dust scraper 21 can clean the dust accumulated on the air inlet surface of the screen 4 in a timely manner during or after the collection process, preventing dust from clogging the screen 4 and reducing the collection efficiency. At the same time, the cleaned dust can fall into the dust collection box 27 through the dust discharge port 22, which is convenient for the centralized collection of dust, subsequent testing and maintenance of the device.

[0041] The frame plate 2 provides stable support for the screen 4, ensuring that the screen 4 remains structurally stable under airflow and preventing the screen 4 from shifting or deforming, which would affect the dust filtration effect. The cooperation between the guide rod 14 and the screw 15 guides and limits the movement of the connecting block 19, ensuring that the connecting block 19 drives the air guide plate 5 and the suction plate 9 to rise and fall smoothly, thus improving the stability of the device operation.

[0042] Please see Figure 2 , Figure 3 and Figure 4 Sealing protrusions 3 are installed on all four sides of the outer side of the frame plate 2, and the frame plate 2 is connected to the box body 1 by inserting the sealing protrusions 3. By installing the sealing protrusions 3 on all four sides of the outer side of the frame plate 2, the frame plate 2 and the box body 1 can be connected by inserting the sealing protrusions 3 to achieve a sealing connection.

[0043] The top of the housing 1 has a replacement slot, and the frame plate 2 is inserted into the inner cavity of the housing 1 through the replacement slot. A sealing plate 29 is inserted and connected to the inner cavity of the replacement slot of the housing 1. The replacement slot is provided on the top of the housing 1. When the frame plate 2 needs to be installed, the frame plate 2 is inserted into the inner cavity of the housing 1 through the replacement slot. After the frame plate 2 is installed, the sealing plate 29 is inserted into the inner cavity of the replacement slot of the housing 1.

[0044] The upper side of the sealing plate 29 is provided with a pull-out groove, and the bottom of the box 1 is rotatably connected with self-locking casters 30. The sealing plate 29 has a pull-out groove on its upper side, and the box 1 has self-locking casters 30 rotatably connected to its bottom. When the sealing plate 29 needs to be removed, the sealing plate 29 is pulled upwards by engaging the pull-out groove, thus separating the sealing plate 29 from the replacement slot. When the box 1 needs to be moved, the self-locking casters 30 are used to move the box 1. After moving to the designated position, the self-locking function of the casters 30 is used to fix the box 1.

[0045] A flow divider 6 is installed inside the air guide plate 5, and flow divider holes are evenly distributed on the surface of the flow divider 6. When airflow passes through the air guide plate 5, the airflow enters the flow divider 6 and is divided through the flow divider holes.

[0046] Please see Figure 1 A snap-fit ​​plate 12 is installed on the outside of the housing 1, and the surface of the snap-fit ​​plate 12 has snap-fit ​​grooves. Symmetrical elastic snap heads 13 are installed on the surface of each snap-fit ​​groove. The vacuum cleaner head 8 is snapped into the snap-fit ​​plate 12 through the snap-fit ​​grooves and the elastic snap heads 13. When the vacuum cleaner head 8 is not needed, it is placed in the snap-fit ​​groove, and the elastic snap heads 13 securely connect the vacuum cleaner head 8 to the snap-fit ​​plate 12.

[0047] Please see Figure 5 and Figure 6 The dust discharge port 22 has a convex design that is smaller at the top and larger at the bottom. A triangular blocking plate 23 is slidably attached to the upper part of the inner cavity of the dust discharge port 22, and the triangular blocking plate 23 is located directly below the dust scraper plate 21. Sliding blocks 24 are installed on both sides of the triangular blocking plate 23. The dust discharge port 22 is designed with a convex structure that is smaller at the top and larger at the bottom. The triangular blocking plate 23 is slidably attached to the upper part of the inner cavity of the dust discharge port 22, ensuring that the triangular blocking plate 23 is located directly below the dust scraper plate 21. Sliding blocks 24 are installed on both sides of the triangular blocking plate 23. When dust discharge is required, the dust scraper plate 21 slides vertically downward and pushes the triangular blocking plate 23 to slide vertically downward, opening the dust discharge port 22. The dust scraped off by the dust scraper plate 21 is discharged through the dust discharge port 22. When dust discharge is not required, the triangular blocking plate 23 slides vertically upward and returns to its original position under the action of the return spring, closing the dust discharge port 22.

[0048] The inner side wall of the dust discharge port 22 is provided with a sliding groove 25, and the sliding block 24 slides against the upper part of the inner cavity of the sliding groove 25. A return spring 26 is installed in the inner cavity of the sliding groove 25, and the top and bottom of the return spring 26 elastically abut against the lower part of the sliding block 24 and the lower part of the inner cavity of the sliding groove 25, respectively. A sliding groove 25 is made on the inner side wall of the dust outlet 22. The sliding block 24 is slidably attached to the upper part of the inner cavity of the sliding groove 25. A return spring 26 is installed in the inner cavity of the sliding groove 25, so that the top and bottom of the return spring 26 elastically abut against the lower part of the sliding block 24 and the lower part of the inner cavity of the sliding groove 25, respectively. When the dust scraper 21 pushes the triangular blocking plate 23 and slides vertically downward, it drives the sliding block 24 to move vertically downward in the sliding groove 25. The sliding block 24 squeezes the return spring 26. When the dust scraper 21 returns to its original position, it releases the push against the triangular blocking plate 23. The elastic restoring force of the return spring 26 drives the sliding block 24 to return to its original position, thereby driving the triangular blocking plate 23 to return to its original position.

[0049] This solution: Using the self-locking casters 30 around the bottom of the housing 1, the device is moved to the designated sampling location for occupational health testing. After being moved into place, the self-locking function of the casters 30 is used to fix the housing 1.

[0050] By using the pull-out slot on the upper side of the sealing plate 29, the sealing plate 29 inserted into the inner cavity of the replacement slot at the top of the box 1 can be removed, exposing the replacement slot of the box 1.

[0051] Insert the frame plate 2 into the inner cavity of the box 1 through the replacement slot. Use the sealing protrusions 3 on the outer periphery of the frame plate 2 to achieve a sealed connection between the frame plate 2 and the box 1, ensuring that the frame plate 2 is fixed in the center of the inner cavity of the box 1 and that the position of the screen 4 in the center of the frame plate 2 is stable.

[0052] Reinsert the sealing plate 29 into the replacement slot cavity of the box 1 to seal the replacement slot and prevent external impurities from entering the inner cavity of the box 1.

[0053] By using the elastic clip 13 in the clip groove on the surface of the external clip plate 12 of the housing 1, pull the dust suction head 8 outward to disengage the dust suction head 8 from the clip plate 12, and hold the dust suction head 8 to the detection area where dust needs to be collected.

[0054] Before operating the controller 28 on the upper part of the control box 1, it is necessary to understand the system modules included in the controller 28 and the function of each module. Its system modules mainly include a central processing module, a drive motor control module, a suction fan control module, a lifting electric rod control module, and an operation status monitoring module. The central processing module is used to coordinate the operation of each module, receive and execute the operator's operation instructions, ensure that the actions of each module are synchronized, and transmit various control signals and monitoring signals.

[0055] The drive motor control module receives instructions from the central processing module to control the start, stop, and continuous operation of the drive motor 18, realize the rotation and stop control of the screw 15, and thereby adjust the lifting and lowering of the air guide plate 5 and the suction plate 9; the suction fan control module receives instructions from the central processing module to control the start and stop of the suction fan 11, realize the generation and stop of negative pressure suction, and ensure the normal operation of dust collection.

[0056] The lifting electric rod control module is used to receive instructions from the central processing module, control the operation and reset of the lifting electric rod 20, and drive the dust scraper 21 to slide along the air inlet surface of the screen 4 to complete the dust cleaning and dust scraper 21 reset operation.

[0057] The operation status monitoring module is used to monitor the operation status of screen 4 in real time, promptly capture the local clogging trend of screen 4, and feed back the monitored status signals to the central processing module. The central processing module then issues corresponding adjustment commands to provide a basis for subsequent anti-clogging operations.

[0058] The controller 28 on the upper part of the control box 1 issues commands through the central processing module of the controller 28 to control the start of the drive motor control module and the suction fan control module respectively, thereby starting the drive motor 18 on the upper part of the control box 1 and the suction fan 11 outside the control box 1.

[0059] After the suction fan 11 is started, it generates negative pressure suction. This suction is transmitted to the suction plate 9 through the exhaust pipe 10, so that the air inlet end of the suction plate 9 forms a negative pressure environment. Under the action of negative pressure, the dust-containing gas from the outside enters through the dust suction head 8 and is then transported to the air guide plate 5 through the air inlet pipe 7.

[0060] After the dust-laden gas enters the air guide plate 5, it flows through the diversion air plate 6 inside the air guide plate 5. The airflow is diverted through the diversion holes on the surface of the diversion air plate 6. The diverted airflow is guided by the air guide plate 5 and flows smoothly to the screen 4.

[0061] Dust in the airflow is intercepted and filtered by the screen 4. The filtered gas passes through the screen 4 and enters the suction plate 9 on the other side of the screen 4. It is then transported to the suction fan 11 through the exhaust pipe 10 connected to the air outlet of the suction plate 9. Finally, it is discharged from the outside of the device by the suction fan 11, completing the initial dust collection.

[0062] During the dust collection process, the operating status of the screen 4 is observed in real time through the controller 28. If the screen 4 is found to be partially blocked, the drive motor 18 is controlled to run continuously through the controller 28.

[0063] When the drive motor 18 is running, it drives the screw 15 connected to it to rotate. The pulley 16 at the bottom of the screw 15 drives the screws 15 on both sides of the inner cavity of the housing 1 to rotate synchronously through the transmission belt 17. The connecting block 19, which is sleeved on the surface of the guide rod 14 and threaded with the screw 15, moves up and down along the guide rod 14 under the action of the rotation of the screw 15.

[0064] When the connecting block 19 is raised or lowered, it drives the air guide plate 5 and the suction plate 9 connected to it to rise and fall synchronously, adjusting the corresponding positions of the air guide plate 5 and the suction plate 9 with the screen 4, avoiding blockage in some parts of the screen 4, and ensuring that the screen 4 as a whole continues to perform its filtering and collection function.

[0065] When the dust collection work is completed, or when a lot of dust is observed to have accumulated on the surface of the screen 4, the controller 28 controls the operation of the lifting electric rod 20. The lifting end of the lifting electric rod 20 drives the dust scraper 21 to slide along the air inlet surface of the screen 4.

[0066] While the dust scraper 21 slides, it pushes the triangular blocking plate 23 at the upper part of the inner cavity of the dust discharge port 22, causing the sliding blocks 24 on both sides of the triangular blocking plate 23 to slide downwards in the sliding groove 25 on the inner side wall of the dust discharge port 22. When the sliding blocks 24 slide, they press the return spring 26 in the inner cavity of the sliding groove 25, causing the triangular blocking plate 23 to disengage from the dust discharge port 22 and opening the dust discharge port 22.

[0067] As the dust scraper 21 slides on the air inlet surface of the screen 4, it scrapes off the dust intercepted on the surface of the screen 4. Under the action of gravity, the scraped dust falls into the dust collection box 27 installed at the discharge end of the dust discharge port 22, which has a convex design.

[0068] After the dust is cleaned, the triangular blocking plate 23 is loosened, the return spring 26 in the inner cavity of the sliding groove 25 returns to its deformation, and pushes the sliding block 24 to slide upward in the sliding groove 25. The sliding block 24 drives the triangular blocking plate 23 to rise synchronously, so that the triangular blocking plate 23 slides back to fit against the upper part of the inner cavity of the dust discharge port 22, and the dust discharge port 22 is closed.

[0069] The controller 28 shuts off the drive motor 18 and the suction fan 11, stopping the dust collection and anti-clogging adjustment work. At the same time, it controls the lifting electric rod 20 to reset, driving the dust scraper 21 back to the initial position and keeping it in contact with the screen 4.

[0070] Align the handheld vacuum cleaner head 8 with the clip groove on the surface of the clip plate 12, press the vacuum cleaner head 8 inward, and use the elastic action of the elastic clip head 13 to make the vacuum cleaner head 8 and the clip plate 12 snap together, thus completing the storage of the vacuum cleaner head 8.

[0071] If further testing of the dust in the dust collection box 27 is required, remove the dust collection box 27 from the discharge end of the dust outlet 22, empty the dust inside, and reinstall it; if no immediate treatment is required, keep the dust collection box 27 connected to the dust outlet 22.

[0072] When it is necessary to replace or maintain the frame plate 2 and the screen 4, repeat the operation of removing the sealing plate 29 and removing the frame plate 2. After the maintenance or replacement is completed, reinstall the frame plate 2 and the sealing plate 29.

[0073] After all testing is completed, release the self-locking universal wheel 30 and use it to move the device to the designated storage location, thus completing the entire dust collection process.

[0074] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0075] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust collection device for occupational health testing, characterized in that, include: Box (1), and frame plate (2) set in the center of the inner cavity of box (1), and a screen (4) is installed in the center of the frame plate (2), and a guide plate (5) and a suction plate (9) are respectively added on both sides of the screen (4), the air outlet of the guide plate (5) and the air inlet of the suction plate (9) correspond to each other; A vacuum head (8) is located outside the housing (1), and the air outlet of the vacuum head (8) is connected to an air inlet pipe (7). The air outlet of the air inlet pipe (7) extends through the housing (1) and connects to the air inlet of the air guide plate (5). An exhaust pipe (10) is connected to the air outlet of the suction plate (9). A suction fan (11) is installed on the outside of the housing (1) on the opposite side of the vacuum head (8). The air outlet of the exhaust pipe (10) is connected to the air inlet of the suction fan (11). The guide rod (14) and the screw (15) are respectively set on both sides of the inner cavity of the housing (1), and the bottom end of the screw (15) is equipped with a pulley (16), and a transmission belt (17) is installed between the pulleys (16). The upper part of the housing (1) is equipped with a drive motor (18) and a controller (28), and the drive motor (18) is coaxially connected to the top end of the screw (15). Connecting blocks (19) are set on both sides of the air guide plate (5) and the suction plate (9), and connecting blocks (19) are respectively sleeved on the surface of the guide rod (14) and threaded onto the surface of the screw rod (15). A dust discharge port (22) is opened in the lower part of the inner cavity of the box (1), and a dust collection box (27) is installed at the discharge end of the dust discharge port (22). The lifting electric rod (20) is set on the top of the box (1), and the lifting end of the lifting electric rod (20) passes through the box (1) and is connected to the dust scraper (21). The dust scraper (21) slides against the air inlet surface of the screen (4), and the dust scraper (21) corresponds to the position of the dust outlet (22).

2. The dust collecting device for occupational health detection according to claim 1, characterized in that: The frame plate (2) is equipped with sealing protrusions (3) on all four sides of its outer side, and the frame plate (2) is sealed to the box body (1) through the sealing protrusions (3).

3. The dust collecting device for occupational health detection according to claim 2, characterized in that: The top of the box (1) is provided with a replacement slot, and the frame plate (2) is inserted into the inner cavity of the box (1) through the replacement slot, and a sealing plate (29) is inserted and connected to the inner cavity of the replacement slot of the box (1).

4. The dust collecting device for occupational health detection according to claim 3, characterized in that: The upper side of the sealing plate (29) is provided with a pull buckle groove, and the bottom of the box (1) is rotatably connected with self-locking universal wheels (30).

5. The dust collecting device for occupational health detection according to claim 1, characterized in that: The inner cavity of the air guide plate (5) is equipped with a diversion air plate (6), and the surface of the diversion air plate (6) is uniformly provided with diversion holes.

6. The dust collecting device for occupational health detection according to claim 1, characterized in that: The box (1) is equipped with a snap-fit ​​plate (12) on the outside, and the snap-fit ​​plate (12) has a snap-fit ​​groove on its surface. Symmetrical elastic snap heads (13) are installed on the surface of the snap-fit ​​groove, and the vacuum head (8) is snapped and connected to the snap-fit ​​plate (12) through the snap-fit ​​groove and the elastic snap head (13).

7. The dust collection device for occupational health testing according to claim 1, characterized in that: The dust outlet (22) has a convex design with a smaller top and a larger bottom. A triangular blocking plate (23) is slidably attached to the upper part of the inner cavity of the dust outlet (22). The triangular blocking plate (23) is located directly below the dust scraper (21), and sliding blocks (24) are installed on both sides of the triangular blocking plate (23).

8. The dust collecting device for occupational health detection according to claim 7, characterized in that: The inner side wall of the dust discharge port (22) is provided with a sliding groove (25), and the sliding block (24) slides against the upper part of the inner cavity of the sliding groove (25). A return spring (26) is installed in the inner cavity of the sliding groove (25), and the top and bottom of the return spring (26) elastically abut against the lower part of the sliding block (24) and the lower part of the inner cavity of the sliding groove (25), respectively.

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