CN216498215U - Dust fall equipment for building engineering - Google Patents
Dust fall equipment for building engineering Download PDFInfo
- Publication number
- CN216498215U CN216498215U CN202220041429.5U CN202220041429U CN216498215U CN 216498215 U CN216498215 U CN 216498215U CN 202220041429 U CN202220041429 U CN 202220041429U CN 216498215 U CN216498215 U CN 216498215U
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- Prior art keywords
- fixedly connected
- dust
- box body
- dust collection
- box
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- 239000000428 dust Substances 0.000 title claims abstract description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000007789 sealing Methods 0.000 claims abstract description 35
- 238000003860 storage Methods 0.000 claims abstract description 18
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 238000001914 filtration Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000009435 building construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002337 anti-port Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of dust-settling equipment, in particular to dust-settling equipment for constructional engineering, which comprises a box body, wherein four universal wheels are fixedly connected to the bottom end of the box body, a water storage cavity and a dust collection cavity are respectively arranged on the left side and the right side in the box body, the upper side of the right end of the water storage cavity is communicated with the dust collection cavity through a vent groove, the top end of the box body is connected with an insert box communicated with the vent groove, the left side of the top end of the insert box is hinged with a sealing cover, the right end of the sealing cover is fixedly connected with the insert box through a hasp lock, the bottom end of the sealing cover is fixedly connected with a sealing gasket, the bottom end of the sealing gasket is contacted with the top end of the insert box, a filter plate is inserted into the insert box, a scraper plate is fixedly connected to the right side of the bottom end of the vent groove, and the left end of the scraper plate is contacted with the right end of the filter plate; it can clear up the dust on the filter, avoids the filter to block up, can go on at the in-process of the work of dust fall, avoids hindering the time of dust fall, improves the efficiency of dust fall.
Description
Technical Field
The utility model relates to the technical field of dust-settling equipment, in particular to dust-settling equipment for constructional engineering.
Background
Building construction site earth excavation, building material stack, structure fitment construction, frequent business turn over of vehicle etc. often can produce a large amount of raise dusts, not only pollute city air environment, harm people's healthy moreover, are provided with dust fall equipment at the building construction site usually.
Through the retrieval, chinese patent is CN 214764339U's utility model patent discloses a dust fall equipment for building engineering, including the device main part, the four corners fixed mounting of device main part lower extreme surface has the bracing piece, the lower extreme outside fixed mounting of bracing piece has the auto-lock universal wheel, one side of device main part upper end surface is provided with watering mechanism, the opposite side of device main part upper end surface is provided with dust removal mechanism, it is when using, inhale to device main part inside air through the air pump through dust removal filter, adsorbed dust can be more and more on the long-time filter, lead to dust removal filter to block up easily, be not convenient for clear up the dust on the filter, it clears up to need people to dismantle the dust removal filter, need stop its dust fall work, delay the time of dust fall, the efficiency of dust fall has been reduced.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Aiming at the defects of the prior art, the utility model provides dust settling equipment for constructional engineering, which aims to solve the problems in the background art.
(II) technical scheme
In order to achieve the purpose, the utility model provides the following technical scheme: a dust-settling device for construction engineering comprises a box body, wherein four universal wheels are fixedly connected to the bottom end of the box body, a water storage cavity and a dust collection cavity are respectively arranged on the left side and the right side inside the box body, the upper side of the right end of the water storage cavity is communicated with the dust collection cavity through an air groove, an inserting box communicated with the air groove is connected to the top end of the box body, a sealing cover is hinged to the left side of the top end of the inserting box, the right end of the sealing cover is fixedly connected with the inserting box through a hasp lock, a sealing gasket is fixedly connected to the bottom end of the sealing cover, the bottom end of the sealing gasket is in contact with the top end of the inserting box, a filter plate is inserted into the inserting box, a scraper blade is fixedly connected to the right side of the bottom end of the air groove, the left end of the scraper blade is in contact with the right end of the filter plate, a threaded hole is formed in the bottom end of the filter plate, a sliding groove is formed in the bottom end of the filtering plate, a motor is installed at the bottom end of the box body, the output fixedly connected with screw rod of motor, the top spiral shell dress of screw rod is in the inside of screw hole, the air pump with the inside intercommunication of dust collection chamber is installed on the top right side of box, air velocity transducer is installed on the top in dust collection chamber, the water pump is installed in the top left side of box, the input of water pump is connected with the pipe that absorbs water that extends to the inside bottom side of water storage chamber, the output intercommunication of water pump has the connecting pipe, the one end intercommunication that the connecting pipe extends to the inside of water storage chamber has first minute water pipe, first minute water pipe extends to the left one end intercommunication of box and has the second minute water pipe, the left end of second minute water pipe and the bottom of first minute water pipe all communicate and have a plurality of nozzles, the left end of box is provided with the gas outlet.
Preferably, the rear end of the dust collection chamber is positioned on the right side of the filter plate and is provided with a slide rail, the slide rail is internally provided with a slide seat in a sliding manner, the slide seat is internally provided with a slide groove, the slide groove is internally provided with a slide block in a sliding manner, the right end of the slide block is connected with a first compression spring, the left end of the slide block is fixedly connected with a clamping block, the right end of the filter plate is provided with a clamping groove corresponding to the clamping block, the left end of the clamping block is inserted into the clamping groove, the right end of the slide groove is fixedly connected with an electromagnet, the right end of the slide block is embedded with a magnetic block, the top end of the slide seat is fixedly connected with a first magnetic plate, the top end of the dust collection chamber is embedded with a second magnetic plate corresponding to the first magnetic plate, the right end of the dust collection chamber is rotatably connected with a sealing plate, the right end of the sealing plate is connected with a second compression spring, the top end of the second compression spring is fixedly connected with the right end of the dust collection chamber, and the right end of the dust collection chamber is fixedly connected with a baffle plate, the top of baffle and the bottom contact of shrouding, the top fixedly connected with stay cord of shrouding, the right-hand member upside of dust collection chamber is connected with the guide pulley, and the stay cord is connected with the guide pulley transmission, and the one end of shrouding and the right-hand member fixed connection of slide are kept away from to the stay cord.
Furthermore, the right end of the box body is provided with a cleaning groove communicated with the inside of the dust collection cavity, the inside of the cleaning groove is connected with a cleaning plate through a sealing hinge, and the right end of the cleaning plate is fixedly connected with a pull handle.
Still further, the bottom of the water suction pipe is connected with a filter hopper.
In a further scheme, the top end of the box body is connected with a water injection pipe, and the bottom end of the water injection pipe extends to the inside of the water storage cavity.
On the basis of the scheme, the upper side of the right end of the box body is fixedly connected with a push handle.
(III) advantageous effects
Compared with the prior art, the utility model provides dust settling equipment for constructional engineering, which has the following beneficial effects:
this dust fall equipment for building engineering, detect the speed that the air through the filter flows through air velocity transducer, when the wind speed that detects is less, prove that absorbent dust is more on the filter, it rotates to drive the screw rod through the motor, the screw rod rotates and makes the filter move down, scrape the dust on the filter through the scraper blade, then drive screw rod antiport through the motor, make the filter remove to the upside, thereby can clear up the dust on the filter, avoid the filter to block up, can go on at the in-process of the work of dust fall, avoid hindering the time of dust fall, the efficiency of dust fall is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2A;
fig. 4 is a schematic view of the enlarged structure of the portion B in fig. 2 according to the present invention.
In the figure: 1. a box body; 2. a universal wheel; 3. inserting a box; 4. a sealing cover; 5. a hasp lock; 6. a gasket; 7. a filter plate; 8. a squeegee; 9. a motor; 10. a screw; 11. an air pump; 12. a wind speed sensor; 13. a water pump; 14. a suction pipe; 15. a connecting pipe; 16. a first water diversion pipe; 17. a second water dividing pipe; 18. a nozzle; 19. a slide rail; 20. a slide base; 21. a slider; 22. a first compression spring; 23. a clamping block; 24. closing the plate; 25. a second compression spring; 26. a baffle plate; 27. pulling a rope; 28. a guide wheel; 29. cleaning the plate; 30. pulling a handle; 31. a filter hopper; 32. a water injection pipe; 33. a push handle; 34. an electromagnet; 35. a magnetic block; 36. a first magnetic plate; 37. a second magnetic plate.
Detailed Description
Examples
Referring to fig. 1-4, a dust-settling device for construction engineering comprises a box body 1, four universal wheels 2 are fixedly connected to the bottom end of the box body 1, the box body 1 is convenient to move by the universal wheels 2 rolling on the ground, a push handle 33 is fixedly connected to the upper side of the right end of the box body 1, the push handle 33 is convenient to push the box body to move, a water storage cavity and a dust collection cavity are respectively arranged on the left side and the right side of the interior of the box body 1, the upper side of the right end of the water storage cavity is communicated with the dust collection cavity through a vent groove, a plug box 3 communicated with the vent groove is connected to the top end of the box body 1, a sealing cover 4 is hinged to the left side of the top end of the plug box 3, the right end of the sealing cover 4 is fixedly connected with the plug box 3 through a hasp lock 5, a sealing gasket 6 is fixedly connected to the bottom end of the sealing gasket 6, the bottom end of the sealing gasket 6 is contacted with the top end of the plug box 3, and the top end of the plug box 3 is sealed through the sealing cover 4 and the sealing gasket 6, the air entering the box body 1 is prevented from being discharged from the plug-in box 3, the sealing cover 4 is opened, the screw rod 10 is driven to rotate through the motor 9 to enable the screw rod 10 to be screwed out from the inside of the threaded hole, the Guo filtering plate 7 is convenient to be pulled out from the inside of the plug-in box 3, the filtering plate 7 is convenient to replace, the filtering plate 7 is inserted into the plug-in box 3, the scraping plate 8 is fixedly connected to the right side of the bottom end of the ventilating groove, the left end of the scraping plate 8 is in contact with the right end of the filtering plate 7, the threaded hole is formed in the bottom end of the filtering plate 7, the sliding groove is formed in the bottom end of the ventilating groove, the motor 9 is installed at the bottom end of the box body 1, the screw rod 10 is fixedly connected to the output end of the motor 9, the top end of the screw rod 10 is screwed into the inside of the threaded hole, the top end of the box body 1 is connected with the water injection pipe 32, the bottom end of the water injection pipe 32 extends into the inside of the water storage cavity, and water can be added into the water storage cavity through the water injection pipe 32, an air pump 11 communicated with the inside of the dust collection cavity is arranged on the right side of the top end of the box body 1, an air speed sensor 12 is arranged on the top end of the dust collection cavity, a water pump 13 is arranged on the left side of the top end of the box body 1, the input end of the water pump 13 is connected with a water suction pipe 14 extending to the bottom side of the inside of the water storage cavity, the bottom end of the water suction pipe 14 is connected with a filter hopper 31, water entering the water suction pipe 14 can be filtered through the filter hopper 31, so that nozzles 18 can be prevented from being blocked by impurities in the water, the output end of the water pump 13 is communicated with a connecting pipe 15, one end, extending to the inside of the water storage cavity, of the connecting pipe 15 is communicated with a first water distribution pipe 16, one end, extending to the left side of the box body 1, of the first water distribution pipe 16 is communicated with a second water distribution pipe 17, the left end of the second water distribution pipe 17 and the bottom end of the first water distribution pipe 16 are communicated with a plurality of nozzles 18 through the water pump 13, water distribution pipe 17 and the nozzles 18, the dust removal device is sprayed to the periphery of the box body 1 and the inside of the box body 1 through a plurality of nozzles 18, dust removal is carried out on the air around through sprayed water mist, the ground is prevented from being dried, secondary treatment can be carried out on the air inside the box body 1, an air outlet is formed in the left end of the box body 1, the flowing speed of the air passing through the filter plate 7 is detected through an air speed sensor 12, when the detected air speed is low, more dust is adsorbed on the filter plate 7, the motor 9 drives the screw rod 10 to rotate, the screw rod 10 rotates to enable the filter plate 7 to move downwards, the dust on the filter plate 7 is scraped through the scraper 8, then the motor 9 drives the screw rod 10 to rotate reversely, the filter plate 7 is moved to the upper side, the dust on the filter plate 7 can be cleaned, the filter plate 7 is prevented from being blocked, the dust removal can be carried out in the dust removal process, and the dust removal delay time is avoided, the efficiency of dust fall is improved.
It should be further noted that the rear end of the dust collecting chamber is located on the right side of the filter plate 7, a slide rail 19 is arranged inside the slide rail 19, a slide seat 20 is arranged inside the slide seat 20 in a sliding manner, a slide block 21 is arranged inside the slide groove in a sliding manner, a first compression spring 22 is connected to the right end of the slide block 21, a clamping block 23 is fixedly connected to the left end of the slide block 21, a clamping groove is arranged at the position of the right end of the filter plate 7 corresponding to the clamping block 23, the left end of the clamping block 23 is inserted into the clamping groove, an electromagnet 34 is fixedly connected to the right end of the slide groove, a magnetic block 35 is embedded and mounted at the right end of the slide block 21, by switching on a power supply of the electromagnet 34, the electromagnet 34 and the magnetic block 35 attract each other to move the slide block 21 and the clamping block 23 rightward, so that the clamping block 23 is separated from the clamping groove, the filter plate 7 is conveniently detached, the filter plate 7 is conveniently, a first magnetic plate 36 is fixedly connected to the top end of the slide seat 20, and a second magnetic plate 37 is embedded and mounted at the position of the top end of the dust collecting chamber corresponding to the first magnetic plate 36, the sliding seat 20 is fixed by the attraction of the first magnetic plate 36 and the second magnetic plate 37, the right end of the dust collection cavity is rotatably connected with a sealing plate 24, the right side of the top end of the sealing plate 24 is connected with a second compression spring 25, the top end of the second compression spring 25 is fixedly connected with the right end of the dust collection cavity, the right end of the dust collection cavity is fixedly connected with a baffle 26, the sealing plate 24 is limited by the baffle 26, the top end of the baffle 26 is contacted with the bottom end of the sealing plate 24, the top end of the sealing plate 24 is fixedly connected with a pull rope 27, the upper side of the right end of the dust collection cavity is connected with a guide wheel 28, the pull rope 27 is in transmission connection with the guide wheel 28, one end of the pull rope 27 far away from the sealing plate 24 is fixedly connected with the right end of the sliding seat 20, the sliding block 21 and the clamping block 23 are pushed by the first compression spring 22 to move towards the left side, the clamping block 23 is inserted into the clamping groove, in the downward movement process of the filtering plate 7, the filtering plate 7 drives the sliding seat 20 to move downwards, slide 20 passes through stay cord 27 pulling shrouding 24 and rotates, dust and impurity scraped through scraper blade 8 fall to the below of shrouding 24, in the in-process of filter 7 rebound, filter 7 drives slide 20 rebound, promote shrouding 24 rebound through the effect of second compression spring 25, avoid the inside bottom side dust of dust collection chamber to be inhaled by the inside mobile air of dust collection chamber, the dust of avoiding the inside collection of dust collection chamber adsorbs on filter 7 again, box 1 right-hand member is provided with the clearance groove with the inside intercommunication of dust collection chamber, the inside sealed hinged joint in clearance groove has clearance board 29, the right-hand member fixedly connected with of clearance board 29 draws handle 30, open clearance board 29 through drawing handle 30, be convenient for clear up the dust of dust collection chamber inside.
The electric equipment in the article is electrically connected with the main controller and 220V mains supply, and the main controller can be a computer or other conventional equipment with control function.
To sum up, the dust settling device for the construction engineering detects the flowing speed of air passing through the filter plate 7 through the air speed sensor 12 when in use, when the detected air speed is small, it is proved that more dust is adsorbed on the filter plate 7, the screw rod 10 is driven to rotate by the motor 9, the filter plate 7 moves downwards by the rotation of the screw rod 10, the dust on the filter plate 7 is scraped off by the scraper 8, then the screw rod 10 is driven to rotate reversely by the motor 9, the filter plate 7 moves to the upper side, in the downward movement process of the filter plate 7, the filter plate 7 drives the sliding seat 20 to move downwards, the sliding seat 20 pulls the closing plate 24 to rotate by the pull rope 27, the dust and impurities scraped off by the scraper 8 fall to the lower part of the closing plate 24, in the upward movement process of the filter plate 7, the filter plate 7 drives the sliding seat 20 to move upwards, the closing plate 24 is pushed to rotate downwards by the action of the second compression spring 25, the upper and lower parts of the dust collecting chamber are separated.
Claims (6)
1. The utility model provides a dust fall equipment for building engineering, includes box (1), its characterized in that: the dust collection box is characterized in that four universal wheels (2) are fixedly connected to the bottom end of the box body (1), a water storage cavity and a dust collection cavity are respectively arranged on the left side and the right side inside the box body (1), the upper side of the right end of the water storage cavity is communicated with the dust collection cavity through an air channel, the top end of the box body (1) is connected with an insert box (3) communicated with the air channel, the left side of the top end of the insert box (3) is hinged with a sealing cover (4), the right end of the sealing cover (4) is fixedly connected with the insert box (3) through a hasp lock (5), a sealing gasket (6) is fixedly connected to the bottom end of the sealing gasket (4), the bottom end of the sealing gasket (6) is contacted with the top end of the insert box (3), a filter plate (7) is inserted into the insert box (3), a scraper plate (8) is fixedly connected to the right side of the bottom end of the air channel, the left end of the scraper plate (8) is contacted with the right end of the filter plate (7), and a threaded hole is formed in the bottom end of the filter plate (7), the bottom end of the air channel is provided with a sliding groove, the bottom end of the filter plate (7) is inserted into the sliding groove, the bottom end of the box body (1) is provided with a motor (9), the output end of the motor (9) is fixedly connected with a screw rod (10), the top end of the screw rod (10) is screwed in a threaded hole, the right side of the top end of the box body (1) is provided with an air pump (11) communicated with the interior of the dust collection cavity, the top end of the dust collection cavity is provided with an air speed sensor (12), the left side of the top end of the box body (1) is provided with a water pump (13), the input end of the water pump (13) is connected with a water suction pipe (14) extending to the bottom side of the interior of the water storage cavity, the output end of the water pump (13) is communicated with a connecting pipe (15), one end of the connecting pipe (15) extending to the interior of the water storage cavity is communicated with a first water dividing pipe (16), one end of the first water dividing pipe (16) extending to the left side of the box body (1) is communicated with a second water dividing pipe (17), the left end of the second water distributing pipe (17) and the bottom end of the first water distributing pipe (16) are communicated with a plurality of nozzles (18), and the left end of the box body (1) is provided with an air outlet.
2. The dust falling equipment for the building engineering of claim 1, characterized in that: the rear end of the dust collection cavity is positioned on the right side of the filter plate (7) and is provided with a slide rail (19), the slide rail (19) is internally provided with a slide seat (20) in a sliding manner, the slide seat (20) is internally provided with a sliding groove, the sliding groove is internally provided with a slide block (21) in a sliding manner, the right end of the slide block (21) is connected with a first compression spring (22), the left end of the slide block (21) is fixedly connected with a clamping block (23), the right end of the filter plate (7) is provided with a clamping groove corresponding to the clamping block (23), the left end of the clamping block (23) is inserted into the clamping groove, the right end of the sliding groove is fixedly connected with an electromagnet (34), the right end of the slide block (21) is embedded with a magnetic block (35), the top end of the slide seat (20) is fixedly connected with a first magnetic plate (36), the top end of the dust collection cavity is embedded with a second magnetic plate (37) at a position corresponding to the first magnetic plate (36), and the right end of the dust collection cavity is rotatably connected with a sealing plate (24), the top right side of shrouding (24) is connected with second compression spring (25), the top of second compression spring (25) and the right-hand member fixed connection in dust collection chamber, the right-hand member fixedly connected with baffle (26) in dust collection chamber, the top of baffle (26) and the bottom contact of shrouding (24), the top fixedly connected with stay cord (27) of shrouding (24), the right-hand member upside in dust collection chamber is connected with guide pulley (28), stay cord (27) and guide pulley (28) transmission are connected, the one end that shrouding (24) were kept away from in stay cord (27) and the right-hand member fixed connection of slide (20).
3. The dust falling equipment for the building engineering of claim 2, characterized in that: the right end of the box body (1) is provided with a cleaning groove communicated with the inside of the dust collection cavity, the inside of the cleaning groove is connected with a cleaning plate (29) through a sealing hinge, and the right end of the cleaning plate (29) is fixedly connected with a pull handle (30).
4. The dust fall equipment for building engineering of claim 3, characterized by: the bottom end of the water suction pipe (14) is connected with a filter hopper (31).
5. The dust fall equipment for building engineering of claim 4, characterized by: the top of box (1) is connected with water injection pipe (32), and the bottom of water injection pipe (32) extends to the inside in water storage chamber.
6. The dust falling equipment for the building engineering according to claim 5, characterized in that: the upper side of the right end of the box body (1) is fixedly connected with a push handle (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220041429.5U CN216498215U (en) | 2022-01-07 | 2022-01-07 | Dust fall equipment for building engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220041429.5U CN216498215U (en) | 2022-01-07 | 2022-01-07 | Dust fall equipment for building engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216498215U true CN216498215U (en) | 2022-05-13 |
Family
ID=81518458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220041429.5U Expired - Fee Related CN216498215U (en) | 2022-01-07 | 2022-01-07 | Dust fall equipment for building engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216498215U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114870513A (en) * | 2022-06-01 | 2022-08-09 | 无锡银燕化工装备科技有限公司 | PTFE emulsion gas-solid separation equipment |
| CN115025560A (en) * | 2022-06-09 | 2022-09-09 | 德州市环境保护科学研究所有限公司 | Automatic environmental dust monitoring and dedusting system |
-
2022
- 2022-01-07 CN CN202220041429.5U patent/CN216498215U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114870513A (en) * | 2022-06-01 | 2022-08-09 | 无锡银燕化工装备科技有限公司 | PTFE emulsion gas-solid separation equipment |
| CN114870513B (en) * | 2022-06-01 | 2023-08-25 | 无锡银燕装备科技有限公司 | PTFE emulsion gas-solid separation equipment |
| CN115025560A (en) * | 2022-06-09 | 2022-09-09 | 德州市环境保护科学研究所有限公司 | Automatic environmental dust monitoring and dedusting system |
| CN115025560B (en) * | 2022-06-09 | 2023-09-08 | 德州市环境保护科学研究所有限公司 | Automatic monitoring and dust removing system for environmental dust |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220513 |
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| CF01 | Termination of patent right due to non-payment of annual fee |