CN113731072A - A adjustable dust device for building site - Google Patents
A adjustable dust device for building site Download PDFInfo
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- CN113731072A CN113731072A CN202110825638.9A CN202110825638A CN113731072A CN 113731072 A CN113731072 A CN 113731072A CN 202110825638 A CN202110825638 A CN 202110825638A CN 113731072 A CN113731072 A CN 113731072A
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- 239000000428 dust Substances 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000006185 dispersion Substances 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims description 55
- 230000005484 gravity Effects 0.000 claims description 17
- 238000003466 welding Methods 0.000 claims description 16
- 238000010276 construction Methods 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 4
- 230000001629 suppression Effects 0.000 claims 6
- 239000000779 smoke Substances 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 13
- 238000009792 diffusion process Methods 0.000 abstract description 4
- 239000007921 spray Substances 0.000 abstract description 3
- 239000003595 mist Substances 0.000 description 13
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
- B01D47/063—Spray cleaning with two or more jets impinging against each other
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention relates to the technical field of building equipment, and discloses an adjustable dust-settling device for a building site. This an adjustable dust device for building site, through inserting outside water source with the limbers at the chassis back, water enters into on the deconcentrator through the limbers, after the dispersion mouth on the deconcentrator, form water smoke, spray in the air, water smoke contacts the back with the dust that wafts in the air, the dust can the adhesion on water smoke, make its weight increase, fall rapidly, reach the purpose of effective dust fall, when meetting strong wind weather, the dust is blown up by wind, the four dispersions, wind-force can blow the fan operation this moment, the wind that the fan blew off can make the water smoke disperse more, reach the effect that increases water smoke diffusion range, make the dust fall effect better.
Description
Technical Field
The invention relates to the technical field of building equipment, in particular to an adjustable dust-settling device for a building site.
Background
The building industry is the industry of nearly modern high-speed development, along with the acceleration of urbanization construction, more and more building sites appear, a high building pulls out the ground, people constantly rush into the city, add the tile for urbanization construction, building site is in the work progress, need notice many-sided problem, especially the safety problem needs strict control, because the construction needs to use a large amount of cement and gravel and sand, so dust on the building site is very many, if not in time the dust fall, then can influence the healthy in the constructor, influence people's sight even.
The mode that current dust fall equipment adopted the watering basically carries out the dust fall, though can effective dust fall, the effect is not good enough, if the job site is blown, the dust flies to everywhere in disorder, the watering dust fall then is comparatively difficult, simultaneously, wind is big more, and the dust that is blown up will be more, and the area that the dust spreads is just wider, seriously influences job site neatly degree and constructor's healthy.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an adjustable dust-settling device for a construction site, which has the advantages of dispersing water mist and regulating water quantity and solves the problems of fixed equipment and limited range.
(II) technical scheme
In order to achieve the purposes of dispersing water mist and regulating water quantity, the invention provides the following technical scheme: the utility model provides an adjustable dust device for building site, includes the chassis, the positive intermediate position welding in chassis has the center disk, the front rotation on chassis is connected with dispersion mechanism, the front sliding connection of center disk has adjustment mechanism, adjustment mechanism's front rotation is connected with link gear, dispersion mechanism's front welding has centrifugal mechanism, adjustment mechanism's front rotation is connected with the adjustment sheet, the central point of chassis and center disk puts and has all seted up water service mouth.
Preferably, the dispersing mechanism comprises a disperser welded on the front of the water through port, the dispersing port is formed in the front of the disperser, a support plate is welded on the front of the base plate, a fan is connected to the front of the support plate in a rotating mode, and the fan is located around the disperser.
Preferably, the adjusting mechanism comprises a limiting plate, the limiting plate is welded on the front face of the central disc, a sliding block is connected to the outer side of the limiting plate in a sliding mode, and a buffer spring is welded to the outer side of the sliding block.
Preferably, the link gear includes the carousel, the carousel rotates the front of connecting at the center disk, the carousel distributes in the front of center disk with the slider is crisscross, the front of slider rotates and is connected with the connecting rod, the one end that the slider was kept away from to the connecting rod rotates the eccentric department of connecting at the carousel, the intermediate position swivelling joint of connecting rod is in the front of limiting plate, the outside winding of carousel has the haulage rope, the one end winding that the carousel was kept away from to the haulage rope is in the front of adjustment sheet.
Preferably, centrifugal mechanism includes the mount, the mount welding is in the front of backup pad, the inboard welding that states the mount has extension spring, extension spring keeps away from the one end welding of mount and has the movable rod, movable rod sliding connection is in the front of mount, the one end welding that extension spring was kept away from to the movable rod has the gravity ball.
Preferably, the position of the gravity ball corresponds to the position of the slide.
Preferably, the adjusting pieces are in a bending design and are uniformly distributed on the front surface of the water through opening, and two adjacent adjusting pieces are mutually overlapped.
(III) advantageous effects
Compared with the prior art, the invention provides an adjustable dust-settling device for a construction site, which has the following beneficial effects:
1. this an adjustable dust device for building site, through inserting outside water source with the limbers at the chassis back, water enters into on the deconcentrator through the limbers, after the dispersion mouth on the deconcentrator, form water smoke, spray in the air, water smoke contacts the back with the dust that wafts in the air, the dust can the adhesion on water smoke, make its weight increase, fall rapidly, reach the purpose of effective dust fall, when meetting strong wind weather, the dust is blown up by wind, the four dispersions, wind-force can blow the fan operation this moment, the wind that the fan blew off can make the water smoke disperse more, reach the effect that increases water smoke diffusion range, make the dust fall effect better.
2. The adjustable dust-settling device for the building site drives the supporting plate to rotate through the rotation of the fan, the rotation of the supporting plate can enable the movable rod to slide on the fixing frame under the action of centrifugal force, the movable rod can drive the gravity ball to move in a sliding mode, the gravity ball contacts and extrudes the sliding block, the sliding block can drive the connecting rod to rotate on the limiting plate in a sliding mode, the connecting rod can drive the rotary table to rotate, the rotary table pulls the traction rope to move, the traction rope pulls the adjusting sheet to rotate on the central disc, the water opening is enlarged, the amount of water flowing into the disperser in unit time is increased, the amount of water discharged from the disperser is increased, the amount of water mist can be increased when the range of the water mist in the air is enlarged by matching with the operation of the fan, the effect of fast dust settling is achieved, and the device can automatically adjust the range and the water yield of the water mist according to the size of the wind speed, and intelligent dust fall is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the present invention in the vicinity of a center plate;
FIG. 3 is an enlarged view of the structure near the adjustment tab of the present invention;
FIG. 4 is an enlarged view of a structure near the slider according to the present invention;
FIG. 5 is an enlarged view of the structure near the fixing frame of the present invention.
In the figure: 1. a chassis; 2. a central disk; 3. a dispersing mechanism; 301. a disperser; 302. a support plate; 303. a fan; 4. an adjustment mechanism; 401. a limiting plate; 402. a buffer spring; 403. a slider; 5. a linkage mechanism; 501. a turntable; 502. a connecting rod; 503. a hauling rope; 6. a centrifugal mechanism; 601. a fixed mount; 602. an extension spring; 603. a movable rod; 604. a gravity ball; 7. a regulating sheet; 8. a water passage port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, an adjustable dust settling device for a building site comprises a chassis 1, a central disc 2 is welded in the middle of the front of the chassis 1, a dispersing mechanism 3 is rotatably connected to the front of the chassis 1, the dispersing mechanism 3 comprises a disperser 301, the disperser 301 is welded to the front of a water through port 8, a dispersing port is formed in the front of the disperser 301, a support plate 302 is welded to the front of the chassis 1, a fan 303 is rotatably connected to the front of the support plate 302, the fan 303 is positioned around the disperser 301, an adjusting mechanism 4 is slidably connected to the front of the central disc 2, an adjusting piece 7 is rotatably connected to the front of the adjusting mechanism 4, the adjusting mechanism 4 comprises a limiting plate 401, the limiting plate 401 is welded to the front of the central disc 2, a sliding block 403 is slidably connected to the outer side of the limiting plate 401, a buffer spring 402 is welded to the outer side of the sliding block 403, a linkage mechanism 5 is rotatably connected to the front of the adjusting mechanism 4, the linkage mechanism 5 comprises a rotary disc 501, the rotary disc 501 is rotatably connected to the front surface of the central disc 2, the rotary disc 501 and the sliding blocks 403 are distributed on the front surface of the central disc 2 in a staggered manner, the front surface of the sliding blocks 403 is rotatably connected with a connecting rod 502, one end, far away from the sliding blocks 403, of the connecting rod 502 is rotatably connected to the eccentric position of the rotary disc 501, the middle position of the connecting rod 502 is rotatably connected to the front surface of the limiting plate 401, a traction rope 503 is wound on the outer side of the rotary disc 501, one end, far away from the rotary disc 501, of the traction rope 503 is wound on the front surface of the adjusting plate 7, the front surface of the dispersing mechanism 3 is welded with a centrifugal mechanism 6, the centrifugal mechanism 6 comprises a fixed frame 601, the fixed frame 601 is welded on the front surface of the supporting plate 302, an extension spring 602 is welded on the inner side of the fixed frame 601, a movable rod 603 is welded on one end, far away from the fixed frame 601, the movable rod 603 is slidably connected to the front surface of the fixed frame 601, and a gravity ball 604 is welded on one end, far away from the extension spring 602, the position of the gravity ball 604 corresponds to the position of the slide block 403, the central positions of the chassis 1 and the central disc 2 are both provided with water through openings 8, the adjusting pieces 7 are in a bending design and are uniformly distributed on the front surfaces of the water through openings 8, and two adjacent adjusting pieces 7 are mutually overlapped.
From the water service mouth 8 access outside water source at the chassis 1 back, water enters into on the deconcentrator 301 through water service mouth 8, after the dispersion mouth on deconcentrator 301, form water smoke, spray in the air, water smoke contacts the back with the dust that wafts in the air, the dust can the adhesion on water smoke, make its weight increase, fall rapidly, reach the purpose of effective dust fall, when meetting strong wind weather, the dust is blown up by wind, the four scatters, wind-force can blow fan 303 operation this moment, the wind that fan 303 blew out can make water smoke disperse more, reach the effect that increases water smoke diffusion scope, make the dust fall effect better.
Example 2
Referring to fig. 1-5, an adjustable dust settling device for a building site comprises a chassis 1, a central disc 2 is welded in the middle of the front of the chassis 1, a dispersing mechanism 3 is rotatably connected to the front of the chassis 1, the dispersing mechanism 3 comprises a disperser 301, the disperser 301 is welded to the front of a water through port 8, a dispersing port is formed in the front of the disperser 301, a support plate 302 is welded to the front of the chassis 1, a fan 303 is rotatably connected to the front of the support plate 302, the fan 303 is positioned around the disperser 301, an adjusting mechanism 4 is slidably connected to the front of the central disc 2, an adjusting piece 7 is rotatably connected to the front of the adjusting mechanism 4, the adjusting mechanism 4 comprises a limiting plate 401, the limiting plate 401 is welded to the front of the central disc 2, a sliding block 403 is slidably connected to the outer side of the limiting plate 401, a buffer spring 402 is welded to the outer side of the sliding block 403, a linkage mechanism 5 is rotatably connected to the front of the adjusting mechanism 4, the linkage mechanism 5 comprises a rotary disc 501, the rotary disc 501 is rotatably connected to the front surface of the central disc 2, the rotary disc 501 and the sliding blocks 403 are distributed on the front surface of the central disc 2 in a staggered manner, the front surface of the sliding blocks 403 is rotatably connected with a connecting rod 502, one end, far away from the sliding blocks 403, of the connecting rod 502 is rotatably connected to the eccentric position of the rotary disc 501, the middle position of the connecting rod 502 is rotatably connected to the front surface of the limiting plate 401, a traction rope 503 is wound on the outer side of the rotary disc 501, one end, far away from the rotary disc 501, of the traction rope 503 is wound on the front surface of the adjusting plate 7, the front surface of the dispersing mechanism 3 is welded with a centrifugal mechanism 6, the centrifugal mechanism 6 comprises a fixed frame 601, the fixed frame 601 is welded on the front surface of the supporting plate 302, an extension spring 602 is welded on the inner side of the fixed frame 601, a movable rod 603 is welded on one end, far away from the fixed frame 601, the movable rod 603 is slidably connected to the front surface of the fixed frame 601, and a gravity ball 604 is welded on one end, far away from the extension spring 602, the position of the gravity ball 604 corresponds to the position of the slide block 403, the central positions of the chassis 1 and the central disc 2 are both provided with water through openings 8, the adjusting pieces 7 are in a bending design and are uniformly distributed on the front surfaces of the water through openings 8, and two adjacent adjusting pieces 7 are mutually overlapped.
The fan 303 rotates to drive the supporting plate 302 to rotate, the rotation of the supporting plate 302 can enable the movable rod 603 to slide on the fixing frame 601 under the action of centrifugal force, the movable rod 603 can drive the gravity ball 604 to move when sliding, the gravity ball 604 contacts and extrudes the sliding block 403, the sliding block 403 can slide between the limiting plates 401, the sliding block 403 can drive the connecting rod 502 to rotate on the limiting plate 401, the connecting rod 502 can drive the rotary disc 501 to rotate, the rotary disc 501 can drive the traction rope 503 to move, the traction rope 503 can drive the adjusting sheet 7 to rotate on the central disc 2, the water through opening 8 is enlarged, the amount of water flowing into the disperser 301 in unit time is increased, the amount of water mist discharged out of the disperser 301 is increased, and by matching with the operation of the fan 303, the amount of water mist in the air can be increased while the range of the water mist is enlarged, the effect of rapid dust fall is achieved, and the device can automatically adjust the range and the water yield according to the size of the air speed, and intelligent dust fall is realized.
Example 3
Referring to fig. 1-5, an adjustable dust settling device for a building site comprises a chassis 1, a central disc 2 is welded in the middle of the front of the chassis 1, a dispersing mechanism 3 is rotatably connected to the front of the chassis 1, the dispersing mechanism 3 comprises a disperser 301, the disperser 301 is welded to the front of a water through port 8, a dispersing port is formed in the front of the disperser 301, a support plate 302 is welded to the front of the chassis 1, a fan 303 is rotatably connected to the front of the support plate 302, the fan 303 is positioned around the disperser 301, an adjusting mechanism 4 is slidably connected to the front of the central disc 2, an adjusting piece 7 is rotatably connected to the front of the adjusting mechanism 4, the adjusting mechanism 4 comprises a limiting plate 401, the limiting plate 401 is welded to the front of the central disc 2, a sliding block 403 is slidably connected to the outer side of the limiting plate 401, a buffer spring 402 is welded to the outer side of the sliding block 403, a linkage mechanism 5 is rotatably connected to the front of the adjusting mechanism 4, the linkage mechanism 5 comprises a rotary disc 501, the rotary disc 501 is rotatably connected to the front surface of the central disc 2, the rotary disc 501 and the sliding blocks 403 are distributed on the front surface of the central disc 2 in a staggered manner, the front surface of the sliding blocks 403 is rotatably connected with a connecting rod 502, one end, far away from the sliding blocks 403, of the connecting rod 502 is rotatably connected to the eccentric position of the rotary disc 501, the middle position of the connecting rod 502 is rotatably connected to the front surface of the limiting plate 401, a traction rope 503 is wound on the outer side of the rotary disc 501, one end, far away from the rotary disc 501, of the traction rope 503 is wound on the front surface of the adjusting plate 7, the front surface of the dispersing mechanism 3 is welded with a centrifugal mechanism 6, the centrifugal mechanism 6 comprises a fixed frame 601, the fixed frame 601 is welded on the front surface of the supporting plate 302, an extension spring 602 is welded on the inner side of the fixed frame 601, a movable rod 603 is welded on one end, far away from the fixed frame 601, the movable rod 603 is slidably connected to the front surface of the fixed frame 601, and a gravity ball 604 is welded on one end, far away from the extension spring 602, the position of the gravity ball 604 corresponds to the position of the slide block 403, the central positions of the chassis 1 and the central disc 2 are both provided with water through openings 8, the adjusting pieces 7 are in a bending design and are uniformly distributed on the front surfaces of the water through openings 8, and two adjacent adjusting pieces 7 are mutually overlapped.
The working principle is that when in use, an external water source is connected from a water inlet 8 on the back of the chassis 1, water enters the disperser 301 through the water inlet 8, water mist is formed after passing through a dispersing opening on the disperser 301, and is sprayed in the air, and after the water mist contacts dust floating in the air, the dust can be adhered to the water mist, so that the weight of the dust is increased, the dust rapidly falls down, and the purpose of effective dust reduction is achieved, when strong wind weather occurs, the dust is blown by wind and floats around, at the moment, the wind can blow the fan 303 to operate, the wind blown by the fan 303 can make the water mist more dispersed, the effect of enlarging the water mist diffusion range is achieved, the dust reduction effect is better, the fan 303 rotates to drive the support plate 302 to rotate, the movable rod 603 can slide on the fixed frame 601 due to the action of centrifugal force due to the rotation of the support plate 302, the movable rod 603 can slide to drive the gravity ball 604 to move, the gravity ball 604 contacts and extrudes the sliding block 403, make slider 403 slide between limiting plate 401, slider 403 slides and can drive connecting rod 502 and rotate on limiting plate 401, connecting rod 502 can drive carousel 501 and rotate, make the motion of carousel 501 pulling haulage rope 503, haulage rope 503 pulling adjustment sheet 7 rotates on centre disk 2, make water gap 8 grow, make the water yield that flows into deconcentrator 301 in the unit interval increase, and then make discharge deconcentrator 301's water smoke increase, the operation of cooperation fan 303, make water smoke in the air also can increase the volume of water smoke in the range of expanding, reach the effect of quick dust fall, make the device can be according to the scope and the water yield of the size automatically regulated water smoke of wind speed, realize intelligent dust fall.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an adjustable dust device for building site, includes chassis (1), its characterized in that: the welding of the positive intermediate position on chassis (1) has center disk (2), the front rotation on chassis (1) is connected with dispersion mechanism (3), the positive sliding connection of center disk (2) has adjustment mechanism (4), the front rotation of adjustment mechanism (4) is connected with link gear (5), the welding in front of dispersion mechanism (3) has centrifugal mechanism (6), the front rotation of adjustment mechanism (4) is connected with adjustment sheet (7), water service mouth (8) have all been seted up to the central point on chassis (1) and center disk (2).
2. The adjustable dust suppression device for the construction site according to claim 1, characterized in that: dispersing mechanism (3) are including deconcentrator (301), deconcentrator (301) welding is in the front of limbers (8), the mouth that disperses has been seted up in the front of deconcentrator (301), the front welding on chassis (1) has backup pad (302), the front rotation of backup pad (302) is connected with fan (303), fan (303) are located disperser (301) all around.
3. The adjustable dust suppression device for the construction site according to claim 1, characterized in that: adjustment mechanism (4) include limiting plate (401), limiting plate (401) welding is in the front of center plate (2), the outside sliding connection of limiting plate (401) has slider (403), the outside welding of slider (403) has buffer spring (402).
4. The adjustable dust suppression device for the construction site according to claim 1, characterized in that: link gear (5) include carousel (501), carousel (501) rotate to be connected in the front of center disk (2), carousel (501) and slider (403) crisscross distribution are in the front of center disk (2), the front of slider (403) is rotated and is connected with connecting rod (502), the one end that slider (403) were kept away from in connecting rod (502) is rotated and is connected in the eccentric department of carousel (501), the intermediate position of connecting rod (502) is changeed the front of connecting at limiting plate (401), the outside winding of carousel (501) has haulage rope (503), the front of the one end winding that carousel (501) were kept away from in haulage rope (503) at adjustment sheet (7).
5. The adjustable dust suppression device for the construction site according to claim 1, characterized in that: centrifugal mechanism (6) are including mount (601), mount (601) welding is in the front of backup pad (302), state that the inboard welding of mount (601) has extension spring (602), the one end welding that mount (601) were kept away from in extension spring (602) has movable rod (603), movable rod (603) sliding connection is in the front of mount (601), the one end welding that extension spring (602) were kept away from in movable rod (603) has gravity ball (604).
6. The adjustable dust suppression device for the construction site according to claim 1, characterized in that: the position of the gravity ball (604) corresponds to the position of the slide block (403).
7. The adjustable dust suppression device for the construction site according to claim 1, characterized in that: the adjusting pieces (7) are in a bending design and are uniformly distributed on the front face of the water through opening (8), and the two adjacent adjusting pieces (7) are mutually overlapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110825638.9A CN113731072A (en) | 2021-07-21 | 2021-07-21 | A adjustable dust device for building site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110825638.9A CN113731072A (en) | 2021-07-21 | 2021-07-21 | A adjustable dust device for building site |
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| Publication Number | Publication Date |
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| CN113731072A true CN113731072A (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110825638.9A Pending CN113731072A (en) | 2021-07-21 | 2021-07-21 | A adjustable dust device for building site |
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| CN (1) | CN113731072A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116020224A (en) * | 2023-02-13 | 2023-04-28 | 山东省建设建工（集团）有限责任公司 | Dustproof equipment for building construction based on sediment degree reduction type |
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| CN112681205A (en) * | 2020-12-25 | 2021-04-20 | 浙江吉祥建设集团有限公司 | Building site dust device according to wind-force automatically regulated shower nozzle angle |
| CN112870883A (en) * | 2020-12-31 | 2021-06-01 | 象山广业机械有限公司 | Strength automatically regulated dust fall shower nozzle of building engineering construction usefulness |
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| SU1645563A1 (en) * | 1988-08-23 | 1991-04-30 | Новосибирский Институт Инженеров Железнодорожного Транспорта | Dust-suppressing unit for rock drills |
| US20130014963A1 (en) * | 2011-07-11 | 2013-01-17 | Frank Thomas Porta | Quick connect fire and dust suppression system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116020224A (en) * | 2023-02-13 | 2023-04-28 | 山东省建设建工（集团）有限责任公司 | Dustproof equipment for building construction based on sediment degree reduction type |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20211203 |