A laboratory waste gas purification and treatment ventilation device

Abstract

A laboratory exhaust gas purification and treatment ventilation device belongs to the technical field of fume hoods. In order to solve the problem that debris is scattered in the fume hood, which increases the cleaning workload after the experiment, the present invention uses a cabinet body, an air outlet is opened at the upper end of the cabinet body, and an air suction hood is fixedly connected to the outer wall of the cabinet body above the air outlet. A group of support rollers are rotatably installed on the cabinet body on both sides of the air suction hood, and a glass window is slidably connected to the cabinet body, and a connecting belt is fixedly connected to the glass window, and a counterweight is fixedly connected to the end of the connecting belt away from the glass window, and the connecting belt is fitted to the upper end of the support roller. The laboratory exhaust gas purification and treatment ventilation device can adjust the position of the two vertical plates in the cabinet body, so that the space layout can be flexibly adjusted according to needs to achieve increased space for dispersed ventilation or reduced space for concentrated ventilation. At the same time, the cabinet body can be cleaned to reduce the accumulation of residues and pollutants, thereby improving the cleanliness and utilization efficiency of the laboratory.

Description

Technical Field

[0001] The invention relates to the technical field of fume hoods, in particular to a laboratory waste gas purification and treatment ventilation device. Background Art

[0002] Fume hoods are equipment used in laboratories to remove harmful gases. Their main function is to exhaust harmful substances such as smoke, dust, and toxic gases generated during the experiment out of the laboratory through a powerful exhaust system, thereby ensuring the safety of the experimental environment, providing a reliable working environment for experimenters, and protecting the laboratory environment from pollution. However, existing fume hoods still have certain shortcomings when used.

[0003] For example, a self-cleaning fume hood for laboratory use with announcement number CN217775104U has a motor installed on the right rear side of the top of the fume hood, a screw is provided on the output shaft of the motor through a coupling, the left end of the screw is rotatably connected to the fume hood, a mounting seat is threaded on the screw, and cleaning brushes for cleaning the fume hood are rotatably provided at even intervals inside the mounting seat, a guide rod is fixed on the upper front side of the fume hood, and the mounting seat slides on the guide rod, and the staff starts the motor, and the mounting seat and the cleaning brush move to the left to automatically clean the top of the fume hood, but various experimental debris are generated during the experiment, and these debris are scattered in the fume hood, increasing the workload of cleaning after the experiment, and may also cause safety hazards and environmental pollution.

[0004] Therefore, a laboratory waste gas purification and treatment ventilation device is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a laboratory waste gas purification and treatment ventilation device to solve the problem raised in the above background technology that after use, debris will be scattered inside the fume hood on the market, which increases the workload of cleaning after the experiment and may also cause safety hazards and environmental pollution.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a laboratory exhaust gas purification and treatment ventilation device, comprising a cabinet, an air outlet is formed at the upper end of the cabinet, and an air suction hood is fixedly connected to the outer wall of the cabinet above the air outlet, a group of support rollers are rotatably mounted on the cabinet on both sides of the air suction hood, and a glass window is slidably connected to the cabinet, a connecting belt is fixedly connected to the glass window, and a counterweight is fixedly connected to the end of the connecting belt away from the glass window, and the connecting belt is attached to the upper end of the support roller;

[0007] Also includes:

[0008] A fixed plate is fixedly arranged at the top of the cabinet body, a filter plate is fixedly connected to the cabinet body below the fixed plate, and a group of sliding grooves are symmetrically opened on the filter plate;

[0009] There are two rectangular frames, which are symmetrically arranged in the chute, and each of the two rectangular frames is provided with a cleaning mechanism;

[0010] A bottom plate is fixedly arranged in the cabinet, a feeding port is provided on the bottom plate, and a collecting box is fixedly connected to the bottom end of the bottom plate below the feeding port, and a slot is provided in the bottom plate on the side of the feeding port, the slot is communicated with the feeding port, an electric push rod is fixedly connected in the slot, and a blocking plate is fixedly connected to the output end of the electric push rod;

[0011] The driving mechanism is arranged on the collecting box and is used for providing driving force.

[0012] Preferably, the fixing plate is arranged at an angle, and two fixing plates are arranged symmetrically with respect to the cabinet body.

[0013] Preferably, the cleaning mechanism includes a first baffle, a first airbag, a second baffle, an air blowing head, a vertical plate, a connecting groove, a guide plate, a rectangular groove, a second airbag, and an extrusion block;

[0014] A first baffle is rotatably mounted on the fixed plate, wherein a first airbag is fixedly connected to the inside of the first baffle, and a second baffle is fixedly connected to the bottom end of the first airbag, and an end of the second baffle away from the first airbag extends through the first baffle and is rotatably connected to the rectangular frame;

[0015] An air blowing head is fixedly arranged on the side wall of the rectangular frame;

[0016] The vertical plate is fixedly arranged at the bottom end of the rectangular frame, the bottom end of the vertical plate is in contact with the bottom plate, and a connecting groove is provided on the vertical plate, a guide plate is movably connected in the connecting groove, and a rectangular groove is provided at the bottom end of the guide plate, a second airbag is fixedly connected in the rectangular groove, and an extrusion block is fixedly connected to the side wall of the second airbag.

[0017] Preferably, the second baffle is slidingly connected to the first baffle, and an air flow channel is opened in the second baffle, and the air outlet end of the air flow channel is connected to the blowing head through a one-way flow hose, the air inlet end of the air flow channel is connected to the air outlet end of the first airbag through a one-way flow pipe, and the air inlet end of the first airbag is connected to the outside world through a one-way flow pipe.

[0018] Preferably, both ends of the guide plate extend through rectangular grooves and are fixedly connected to the inner wall of the cabinet, and the rectangular grooves on the guide plate are slidably connected to the extrusion block, the bottom end of the extrusion block extends through a rectangular groove and is fixedly connected to the vertical plate, and a lighting lamp is fixedly installed on the vertical plate, a nozzle is provided on the vertical plate below the lighting lamp, and the nozzle is inclined, and the air inlet end of the nozzle is connected to the air outlet end of the second air bag through a one-way flow pipe, and the air inlet end of the second air bag is connected to the outside world through a one-way flow pipe.

[0019] Preferably, the blocking plate is slidably connected to the slot, and the size of the blocking plate matches the feed opening.

[0020] Preferably, the collection box includes a box body, a filter cover, an exhaust fan and a first pulley;

[0021] The box body is fixedly arranged on the outer wall of the bottom plate below the discharge port, and the side wall of the box body is fixedly installed with a filter cover, and two filter covers are symmetrically arranged about the box body, and exhaust fans are rotatably installed in the two filter covers, and the shaft ends of the exhaust fans extend through the filter covers and are fixedly connected to the first pulley.

[0022] Preferably, the driving mechanism includes a driving motor, a rotating shaft, a second pulley, a driving gear, a rack, a guide rod and a movable gear block;

[0023] A drive motor is fixedly mounted on the housing, a rotating shaft is rotatably mounted on the housing above the drive motor, and the output ends of the rotating shaft and the drive motor are both fixedly connected to a second pulley, and an end of the rotating shaft away from the second pulley is fixedly connected to a drive gear;

[0024] The rack is movably arranged in the cabinet body, the rack is fixedly connected to a guide rod, and a movable tooth block is provided on the sliding sleeve outside the guide rod.

[0025] Preferably, the driving gear is engaged with the rack and the movable rack block, and a compression spring is connected between the movable rack block and the rack, and the movable rack block and the rack form an elastic telescopic structure through the compression spring, and the outer sides of the second pulley and the first pulley are both fitted with belts.

[0026] Preferably, two racks and two movable gear blocks are symmetrically arranged about the driving gear, and two racks are fixedly connected with connecting rods, the two connecting rods correspond to the vertical plates one by one, and the end of the connecting rod away from the rack is fixedly connected to the vertical plate.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the laboratory exhaust gas purification and ventilation device can adjust the distance between cabinet cavities, optimize ventilation efficiency, and improve equipment flexibility. At the same time, it can clean the cabinet body, reduce the accumulation of residues and pollutants, and improve the cleanliness and utilization efficiency of the laboratory. The specific contents are as follows:

[0028] 1. A driving gear and a rack are provided, and the second pulley is driven to rotate by the driving motor, so that the second pulley drives the belt to move, and the belt drives the rotating shaft to rotate, so that the rotating shaft drives the driving gear to rotate, and the driving gear is engaged with the rack, so that the rack slides along the outer wall of the cabinet while driving the connecting rod to move, and then the vertical plate is driven to move by the connecting rod to adjust the position of the two vertical plates in the cabinet, so that the space layout can be flexibly adjusted according to needs to achieve increased space for dispersed ventilation or reduced space for concentrated ventilation.

[0029] 2. A first air bag and a blowing head are provided. The rectangular frame slides along the slide groove on the filter plate, so that the rectangular frame scrapes off the impurities attached to the lower surface of the filter plate. At the same time, the rectangular frame drives the second baffle to move, so that the second baffle gradually extends into the first baffle, and then squeezes the first air bag in the first baffle, causing the first air bag to shrink, thereby transporting the gas stored in the first air bag to the air flow channel through a one-way flow pipe, and then transported to the blowing head by the air flow channel, and finally blown downward to the upper surface of the filter plate by the blowing head, so that the air flow passes through the filter port on the filter plate, and then performs secondary cleaning, which reduces the frequency and difficulty of manual cleaning of the filter plate, reduces labor costs, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a rear view structural diagram of the present invention;

[0032] Figure 3 Schematic diagram of the internal structure of the present invention;

[0033] Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram;

[0034] Figure 5 For the present invention Figure 3 The enlarged structural diagram at B in the middle;

[0035] Figure 6 This is a schematic diagram of the axonometric structure of the present invention;

[0036] Figure 7 For the present invention Figure 6 The enlarged structural diagram at C in the middle;

[0037] Figure 8 This is a schematic diagram of the main cross-sectional structure of the bottom plate of the present invention;

[0038] Figure 9 This is a schematic diagram of the main cross-sectional structure of the guide plate of the present invention;

[0039] Figure 10 For the present invention Figure 9The enlarged structural diagram at D in the middle;

[0040] Figure 11 For the present invention Figure 9 The enlarged structural diagram at point a is shown in the figure.

[0041] In the figure: 1, cabinet; 2, suction hood; 3, support roller; 4, connecting belt; 5, glass window; 6, counterweight; 7, fixing plate; 8, filter plate; 9, slide; 10, rectangular frame; 11, blocking plate; 12, cleaning mechanism; 1201, first baffle; 1202, first air bag; 1203, second baffle; 1204, blowing head; 1205, vertical plate; 1206, connecting groove; 1207, guide plate; 1208, rectangular groove; 1209, second air bag; 1210, extrusion block; 1211, air flow channel; 121 2. Nozzle; 1213. Lighting lamp; 13. Bottom plate; 14. Feeding port; 15. Collection box; 1501. Box body; 1502. Filter cover; 1503. Exhaust fan; 1504. First pulley; 16. Slot; 17. Electric push rod; 18. Driving mechanism; 1801. Driving motor; 1802. Rotating shaft; 1803. Second pulley; 1804. Driving gear; 1805. Rack; 1806. Guide rod; 1807. Moving gear block; 1808. Compression spring; 1809. Connecting rod; 19. Belt. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] Example 1: Please refer to Figures 1-11 As shown, the present invention provides a technical solution: a laboratory exhaust gas purification and ventilation device, comprising a cabinet 1, an air outlet is opened at the upper end of the cabinet 1, and an air suction hood 2 is fixedly connected to the outer wall of the cabinet 1 above the air outlet, a group of support rollers 3 are rotatably installed on the cabinet 1 on both sides of the air suction hood 2, and a glass window 5 is slidably connected to the cabinet 1, a connecting belt 4 is fixedly connected to the glass window 5, and a counterweight 6 is fixedly connected to the end of the connecting belt 4 away from the glass window 5, and the connecting belt 4 is attached to the upper end of the support roller 3.

[0044] This technical solution utilizes the setting of the glass window 5 and the counterweight 6. When in use, the device is first placed in a flat and empty laboratory. Then the user can gently pull the glass window 5 to make the glass window 5 slide along the cabinet 1. Through the setting of the connecting belt 4 and the counterweight 6, the glass window 5 can automatically maintain a certain height after opening without the user continuously applying force. Furthermore, the suction hood 2 is connected to the external ventilation device, so that the suction hood 2 generates suction to discharge the exhaust gas in the cabinet 1.

[0045] Example 2: The technical content disclosed in this embodiment is an improvement made on the basis of the above-mentioned embodiment 1. The existing fume hood cannot be adjusted according to needs when in use, making it difficult to achieve the optimal air flow efficiency and affecting the purification effect. The technical solution is as follows: Figure 6 and Figure 7 As shown, an adjustment component of the ventilation device is disclosed, wherein a driving mechanism 18 is provided on the collection box 15 for providing a driving force, two rectangular frames 10 are provided, the two rectangular frames 10 are symmetrically arranged in the slide groove 9, and a cleaning mechanism 12 is provided on the two rectangular frames 10, the driving mechanism 18 includes a driving motor 1801, the driving motor 1801 is fixedly arranged on the box body 1501, a rotating shaft 1802 is rotatably installed on the box body 1501 above the driving motor 1801, and the output end of the rotating shaft 1802 and the driving motor 1801 are fixedly connected to the second pulley 1803, and the end of the rotating shaft 1802 away from the second pulley 1803 is fixedly connected to the driving gear 1804, and the rack 1805 is movably arranged in the cabinet 1, and the rack 1805 is fixedly connected to the guide rod 1806, and a movable tooth block 1807 is provided on the outer sliding sleeve of the guide rod 1806, the driving gear 1804 is meshed with the rack 1805 and the movable tooth block 1807, and a compression spring 1808 is connected between the movable tooth block 1807 and the rack 1805, and the movable tooth block 1807 and the rack 1805 form an elastic telescopic structure through the compression spring 1808, the outer sides of the second pulley 1803 and the first pulley 1504 are both fitted with a belt 19, two racks 1805 and two movable tooth blocks 1807 are symmetrically arranged about the driving gear 1804, and two racks 1805 are fixedly connected with a connecting rod 1809, the two connecting rods 1809 correspond to the vertical plate 1205 one by one, and the end of the connecting rod 1809 away from the rack 1805 is fixedly connected to the vertical plate 1205,

[0046] In this technical solution, Figure 6 As shown, this technical solution utilizes the setting of the driving gear 1804 and the rack 1805, so that when the driving gear 1804 rotates, it engages with the rack 1805, thereby driving the vertical plates 1205 to move closer to or away from each other through the rack 1805, thereby changing the size of the space between the cabinet 1 and the suction hood 2, accurately controlling the speed of the airflow, and improving the purification efficiency.

[0047] It uses Figure 7 According to the technical solution shown in the figure, when the position of the vertical plate 1205 in the cabinet 1 needs to be adjusted, the driving motor 1801 is started, and the second pulley 1803 is driven to rotate by the driving motor 1801, so that the second pulley 1803 drives the rotating shaft 1802 to rotate through the belt 19, and the rotating shaft 1802 drives the driving gear 1804 to rotate, so that the driving gear 1804 is engaged with the rack 1805, thereby driving the rack 1805 to slide along the outer wall of the cabinet 1, and the rack 1805 drives the connecting rod 1809 to move synchronously, so that the connecting rod 1809 drives the two vertical plates 1205 When the two vertical plates 1205 move relative to each other, they will drive the rectangular frame 10 to slide along the slide groove 9, so that the rectangular frame 10 drives the second baffle 1203 to move. The second baffle 1203 will gradually extend into the first baffle 1201 and drive the first baffle 1201 to rotate synchronously, thereby gradually reducing the space for gas flow between the air hood 2 and the cabinet 1. When the driving gear 1804 rotates in the opposite direction, the two vertical plates 1205 will move outward at the same time, thereby gradually increasing the space for gas flow between the air hood 2 and the cabinet 1. When the reverse displacement reaches the outermost end, it is used in a conventional ventilation state.

[0048] Example 3: The technical content disclosed in this embodiment is a further improvement based on the above-mentioned examples 1 and 2. Since the fume hood will be scattered with debris after use, it increases the workload of cleaning after the experiment and may also cause safety hazards and environmental pollution. In order to further solve this technical problem, this technical solution is as follows: Figure 1-Figure 5 and Figures 8-11As shown, a cleaning component of a ventilation device is disclosed, wherein a fixed plate 7 is fixedly arranged at the top of the cabinet 1, a filter plate 8 is fixedly connected to the cabinet 1 below the fixed plate 7, and a group of slide grooves 9 are symmetrically provided on the filter plate 8, two rectangular frames 10 are provided, and the two rectangular frames 10 are symmetrically arranged in the slide grooves 9, and a cleaning mechanism 12 is provided on the two rectangular frames 10, a bottom plate 13 is fixedly arranged in the cabinet 1, a discharge port 14 is provided on the bottom plate 13, and a collection box 15 is fixedly connected to the bottom end of the bottom plate 13 below the discharge port 14, and a slot 16 is provided in the bottom plate 13 on the side of the discharge port 14, the slot 16 is communicated with the discharge port 14, and an electric push rod 17 is fixedly connected in the slot 16, and the output end of the electric push rod 17 is fixedly connected to the blocking plate 11, fixed The fixed plate 7 is tilted, and two fixed plates 7 are symmetrically arranged about the cabinet 1. The cleaning mechanism 12 includes a first baffle 1201, which is rotatably arranged on the fixed plate 7. A first air bag 1202 is fixedly connected to the first baffle 1201, and a second baffle 1203 is fixedly connected to the bottom end of the first air bag 1202, and the end of the second baffle 1203 away from the first air bag 1202 extends through the first baffle 1201 and is rotatably connected to the rectangular frame 10. The air blowing head 1204 is fixedly arranged on the side wall of the rectangular frame 10, and the vertical plate 1205 is fixedly arranged at the bottom end of the rectangular frame 10. The bottom end of the vertical plate 1205 is fitted with the bottom plate 13, and a connecting groove 1206 is opened on the vertical plate 1205, and the connecting groove 1206 is movably connected with the guide plate 120 7, and a rectangular groove 1208 is provided at the bottom end of the guide plate 1207, a second air bag 1209 is fixedly connected in the rectangular groove 1208, and an extrusion block 1210 is fixedly connected to the side wall of the second air bag 1209, the second baffle 1203 is slidably connected to the first baffle 1201, and an air flow channel 1211 is provided in the second baffle 1203, and the air outlet end of the air flow channel 1211 is connected to the blowing head 1204 through a one-way flow hose, the air inlet end of the air flow channel 1211 is connected to the air outlet end of the first air bag 1202 through a one-way flow pipe, and the air inlet end of the first air bag 1202 is connected to the outside through a one-way flow pipe, the two ends of the guide plate 1207 extend through the rectangular groove 1208 and are fixedly connected to the inner wall of the cabinet 1, and the guide plate 120 The rectangular groove 1208 on 7 is slidably connected to the extrusion block 1210, and the bottom end of the extrusion block 1210 extends out of the rectangular groove 1208 and is fixedly connected to the vertical plate 1205, and a lighting lamp 1213 is fixedly installed on the vertical plate 1205. A nozzle 1212 is provided on the vertical plate 1205 below the lighting lamp 1213, and the nozzle 1212 is inclined. The air inlet end of the nozzle 1212 is connected to the air outlet end of the second air bag 1209 through a one-way flow pipe, and the air inlet end of the second air bag 1209 is connected to the outside world through a one-way flow pipe. The blocking plate 11 is slidably connected to the slot 16, and the size of the blocking plate 11 is consistent with the discharge port 14. The collection box 15 includes a box body 1501, a filter cover 1502, an exhaust fan 1503 and a first pulley 1504.The box 1501 is fixedly mounted on the outer wall of the bottom plate 13 below the feed opening 14. A filter cover 1502 is fixedly mounted on the side wall of the box 1501. Two filter covers 1502 are symmetrically arranged about the box 1501. Exhaust fans 1503 are rotatably mounted within each of the two filter covers 1502. The shaft ends of the exhaust fans 1503 extend through the filter covers 1502 and are fixedly connected to the first pulley 1504.

[0049] In this technical solution, Figure 3 and Figure 4 As shown, by utilizing the setting of the exhaust fan 1503, the belt 19 drives the first pulley 1504 to rotate when it moves, and the first pulley 1504 drives the exhaust fan 1503 to rotate synchronously, thereby generating airflow, so that the airflow enters the box body 1501 through the discharge port 14, and is then discharged by the filter cover 1502, thereby forming a negative pressure at the discharge port 14, reducing the scattering and residue of impurities, dust and other pollutants outside the bottom plate 13, and making the cleaning process more efficient.

[0050] It uses Figure 1 、 Figure 2 、 Figure 5 and Figures 8-11 In the technical solution shown, in the initial state, the vertical plates 1205 are located on both sides of the cabinet 1. When the interior of the cabinet 1 needs to be cleaned, the driving motor 1801 is started, so that the driving motor 1801 drives the second pulley 1803 to rotate. The second pulley 1803 is driven by the belt 19, so that the rotating shaft 1802 and the driving gear 1804 rotate synchronously. Then, the driving gear 1804 engages with the rack 1805 to drive the vertical plates 1205 to move. The vertical plates 1205 will slide against the surface of the bottom plate 13, thereby scraping off impurities remaining on the bottom plate 13;

[0051] When the vertical plate 1205 moves, it drives the rectangular frame 10 to slide along the slide groove 9. Since the bottom end of the rectangular frame 10 is in contact with the lower surface of the filter plate 8, the rectangular frame 10 will scrape off the impurities attached to the lower surface of the filter plate 8 when it moves. At the same time, the rectangular frame 10 drives the second baffle 1203 to move, so that the second baffle 1203 gradually extends into the first baffle 1201, thereby squeezing the first airbag 1202, and transporting the gas stored in the first airbag 1202 to the air flow channel 1211 through the pipeline, and then transported to the air blowing head 1204 by the air flow channel 1211, and finally ejected by the air blowing head 1204, so that the air flow passes through the filter holes on the filter plate 8, and blows off the impurities scraped off by the rectangular frame 10, thereby reducing the blockage and failure rate of the filter plate 8 and extending the service life of the equipment.

[0052] By starting the electric push rod 17, the electric push rod 17 pulls the sealing plate 11 to slide along the inner wall of the slot 16, thereby automatically opening the discharge port 14. When the vertical plate 1205 moves to both sides of the discharge port 14, the debris will fall into the box body 1501 through the discharge port 14 for collection. At the same time, the driving gear 1804 will continue to rotate and then mesh with the moving tooth block 1807. When the driving gear 1804 meshes with the moving tooth block 1807, the moving tooth block 1807 will slide along the guide rod 1806, thereby squeezing the compression spring 1808 to contract. When the driving gear 1804 and the moving tooth block 1807 are separated, the elastic force of the compression spring 1808 will push the moving tooth block 1807 to reset, thereby stopping the movement of the vertical plate 1205.

[0053] During the movement, the belt 19 drives the first pulley 1504 to rotate, causing the first pulley 1504 to drive the exhaust fan 1503 to rotate. During the rotation of the exhaust fan 1503, air is exhausted outward, so that the airflow enters the box body 1501 through the discharge port 14 and is then discharged through the filter cover 1502, thereby generating negative pressure and improving the collection efficiency of debris.

[0054] During the movement of the vertical plate 1205, the vertical plate 1205 will drive the extrusion block 1210 to move synchronously, so that the extrusion block 1210 slides along the rectangular groove 1208, and the extrusion block 1210 will squeeze the second air bag 1209, thereby shrinking the second air bag 1209, and the gas stored in the second air bag 1209 is transported to the nozzle 1212 through a one-way flow pipe, and then sprayed out by the nozzle 1212, thereby applying an air flow force in the same or similar direction as the scraper movement to the impurities, reducing impurity residue and thus improving the cleaning efficiency. Rate, after the cleaning is completed, control the vertical plate 1205 to move in the reverse direction, the vertical plate 1205 will drive the extrusion block 1210 to move in the reverse direction along the rectangular groove 1208, at this time the second airbag 1209 will reset, thereby sucking and storing the external gas, preparing for the next extrusion and jet, and at the same time the rectangular frame 10 will move in the reverse direction along the slide groove 9, so that the rectangular frame 10 drives the second baffle 1203 to slide out along the inner wall of the first baffle 1201, at this time the first airbag 1202 will reset, sucking and storing the external gas.

[0055] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0056] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laboratory exhaust gas purification and ventilation device, comprising a cabinet, an air outlet is provided at the upper end of the cabinet, and an air suction hood is fixedly connected to the outer wall of the cabinet above the air outlet, a group of support rollers are rotatably mounted on the cabinet on both sides of the air suction hood, and a glass window is slidably connected to the cabinet, a connecting belt is fixedly connected to the glass window, and a counterweight is fixedly connected to the end of the connecting belt away from the glass window, and the connecting belt is attached to the upper end of the support roller; characterized in that Also includes: A fixed plate is fixedly arranged at the top of the cabinet body, a filter plate is fixedly connected to the cabinet body below the fixed plate, and a group of sliding grooves are symmetrically opened on the filter plate; There are two rectangular frames, which are symmetrically arranged in the chute, and each of the two rectangular frames is provided with a cleaning mechanism; A bottom plate is fixedly arranged in the cabinet, a feeding port is provided on the bottom plate, and a collecting box is fixedly connected to the bottom end of the bottom plate below the feeding port, and a slot is provided in the bottom plate on the side of the feeding port, the slot is communicated with the feeding port, an electric push rod is fixedly connected in the slot, and a blocking plate is fixedly connected to the output end of the electric push rod; A driving mechanism, provided on the collection box, for providing driving force; The cleaning mechanism includes a first baffle, a first air bag, a second baffle, an air blowing head, a vertical plate, a connecting groove, a guide plate, a rectangular groove, a second air bag, and an extrusion block; A first baffle is rotatably mounted on the fixed plate, wherein a first airbag is fixedly connected to the inside of the first baffle, and a second baffle is fixedly connected to the bottom end of the first airbag, and an end of the second baffle away from the first airbag extends through the first baffle and is rotatably connected to the rectangular frame; An air blowing head is fixedly arranged on the side wall of the rectangular frame; The vertical plate is fixedly arranged at the bottom end of the rectangular frame, the bottom end of the vertical plate is fitted with the bottom plate, and a connecting groove is provided on the vertical plate, a guide plate is movably connected in the connecting groove, and a rectangular groove is provided at the bottom end of the guide plate, a second airbag is fixedly connected in the rectangular groove, and an extrusion block is fixedly connected to the side wall of the second airbag; the second baffle is slidably connected to the first baffle, and an air flow channel is provided in the second baffle, and the air outlet end of the air flow channel is connected to the blowing head through a one-way flow hose, the air inlet end of the air flow channel is connected to the air outlet end of the first airbag through a one-way flow pipe, and the air inlet end of the first airbag is connected to the outside world through a one-way flow pipe.

2. A laboratory exhaust gas purification and treatment ventilation device according to claim 1, characterized in that: The fixing plates are arranged obliquely, and two fixing plates are arranged symmetrically with respect to the cabinet body.

3. A laboratory exhaust gas purification and treatment ventilation device according to claim 1, characterized in that: The two ends of the guide plate extend through rectangular grooves and are fixedly connected to the inner wall of the cabinet, and the rectangular groove on the guide plate is slidably connected to the extrusion block, the bottom end of the extrusion block extends out of the rectangular groove and is fixedly connected to the vertical plate, and a lighting lamp is fixedly installed on the vertical plate, and a nozzle is provided on the vertical plate below the lighting lamp, and the nozzle is inclined, and the air inlet end of the nozzle is connected to the air outlet end of the second air bag through a one-way flow pipe, and the air inlet end of the second air bag is connected to the outside world through a one-way flow pipe.

4. A laboratory exhaust gas purification and treatment ventilation device according to claim 1, characterized in that: The blocking plate is slidably connected to the slot, and the size of the blocking plate matches the feeding opening.

5. The laboratory exhaust gas purification and ventilation device according to claim 1, characterized in that: The collection box includes a box body, a filter cover, an exhaust fan and a first pulley; The box body is fixedly arranged on the outer wall of the bottom plate below the discharge port, and the side wall of the box body is fixedly installed with a filter cover, and two filter covers are symmetrically arranged about the box body, and exhaust fans are rotatably installed in the two filter covers, and the shaft ends of the exhaust fans extend through the filter covers and are fixedly connected to the first pulley.

6. A laboratory exhaust gas purification and treatment ventilation device according to claim 5, characterized in that: The driving mechanism includes a driving motor, a rotating shaft, a second pulley, a driving gear, a rack, a guide rod and a movable gear block; A drive motor is fixedly mounted on the housing, a rotating shaft is rotatably mounted on the housing above the drive motor, and the output ends of the rotating shaft and the drive motor are both fixedly connected to a second pulley, and an end of the rotating shaft away from the second pulley is fixedly connected to a drive gear; The rack is movably arranged in the cabinet body, the rack is fixedly connected to a guide rod, and a movable tooth block is provided on the sliding sleeve outside the guide rod.

7. A laboratory exhaust gas purification and treatment ventilation device according to claim 6, characterized in that: The driving gear is meshed with the rack and the movable rack block, and a compression spring is connected between the movable rack block and the rack, and the movable rack block and the rack form an elastic telescopic structure through the compression spring, and belts are attached to the outer sides of the second pulley and the first pulley.

8. A laboratory exhaust gas purification and treatment ventilation device according to claim 7, characterized in that: The racks and movable gear blocks are both symmetrically arranged with two each about the driving gear, and the two racks are fixedly connected with connecting rods, the two connecting rods correspond to the vertical plates one by one, and the end of the connecting rod away from the rack is fixedly connected to the vertical plate.

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