CN112807898A - House is demolishd with watering dust absorption formula dust device - Google Patents

House is demolishd with watering dust absorption formula dust device Download PDF

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Publication number
CN112807898A
CN112807898A CN202011526346.7A CN202011526346A CN112807898A CN 112807898 A CN112807898 A CN 112807898A CN 202011526346 A CN202011526346 A CN 202011526346A CN 112807898 A CN112807898 A CN 112807898A
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CN
China
Prior art keywords
dust
water
house
water tank
watering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011526346.7A
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Chinese (zh)
Inventor
王军
崔莉
蔡甲亚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yancheng Xingcheng Real Estate Co ltd
Original Assignee
Yancheng Xingcheng Real Estate Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yancheng Xingcheng Real Estate Co ltd filed Critical Yancheng Xingcheng Real Estate Co ltd
Priority to CN202011526346.7A priority Critical patent/CN112807898A/en
Publication of CN112807898A publication Critical patent/CN112807898A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06Spray cleaning
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/29Floor-scrubbing machines characterised by means for taking-up dirty liquid
    • A47L11/292Floor-scrubbing machines characterised by means for taking-up dirty liquid having rotary tools
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4036Parts or details of the surface treating tools
    • A47L11/4041Roll shaped surface treating tools
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4052Movement of the tools or the like perpendicular to the cleaning surface
    • A47L11/4058Movement of the tools or the like perpendicular to the cleaning surface for adjusting the height of the tool
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/60Combinations of devices covered by groups B01D46/00 and B01D47/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Of Particles Using Liquids (AREA)

Abstract

The invention discloses a watering and dust-absorbing type dust-settling device for demolishing houses, which comprises a cart, wherein a water tank is arranged in the middle of the top end of the cart, one end of the water tank is connected with a water suction pump, the input end of the water suction pump is electrically connected with the output end of a mains supply, the water outlet of the water suction pump is connected with a water pipe through threads, one end of the water pipe is connected with a corrugated pipe, one end of the corrugated pipe is connected with a spray head, one side of the top end of the water tank is provided with a fan, one end of the fan is connected with a conical cover through a connecting pipe, through the water tank, the water suction pump, the water pipe, the corrugated pipe, the spray head, the fan, a connecting pipe, the conical cover and a filter box, dust can be settled by utilizing two modes of spraying dust removal and dust absorption, dust, the application range of the device is increased.

Description

House is demolishd with watering dust absorption formula dust device
Technical Field
The invention relates to the technical field of dust settling devices, in particular to a watering and dust collecting type dust settling device for house dismantling.
Background
A house is a building that lives people or stores things. The house is the base member of family, and the house is the support that lives of mankind, and people can avoid all external interference here, enjoy free life with oneself's relatives, uses the back in the house for a long time, needs to overhaul the house inside, demolish the ceramic tile or the wall in house, needs to use dust device like this.
But current watering dust absorption formula dust device is not convenient for adjust the position of shower nozzle to lead to this watering dust absorption formula dust device to spray the dust removal to single within range inside only, reduced the device's application range.
Disclosure of Invention
The invention provides a sprinkling and dust-collecting type dust-settling device for house demolition, which can effectively solve the problem that the sprinkling and dust-collecting type dust-settling device provided in the background technology is inconvenient for adjusting the position of a spray head, so that the sprinkling and dust-collecting type dust-settling device can only spray and remove dust in a single range, and the application range of the device is reduced.
In order to achieve the purpose, the invention provides the following technical scheme: demolish with watering dust absorption formula dust device in house, including the shallow, shallow top middle part is provided with the water tank, water tank one end is connected with the suction pump, the input of suction pump and the output electric connection of commercial power, there is the water pipe delivery port of suction pump through threaded connection, water pipe one end is connected with the bellows, bellows one end is connected with the shower nozzle, the fan is installed to water tank top one side.
Preferably, one end of the fan is connected with the conical cover through a connecting pipe, and the other end of the fan is connected with the filter box through a connecting pipe.
Utilize the two kinds of modes of spray dust removal and dust absorption, can carry out the dust fall to the gas that contains the dust of being convenient for, increased dust fall efficiency, and two dust fall modes can freely switch over, and then the device of being convenient for uses the different regional insides of different scopes, has increased the device's application scope.
Preferably, the outer surface of the corrugated pipe is sleeved with a lantern ring, a threaded rod is welded in the middle of the bottom end of the lantern ring, a sleeve is connected to the bottom of the outer surface of the threaded rod through threads, a telescopic rod is welded in the middle of the top end of the sleeve, and a positioning block is welded in the middle of the bottom end of the telescopic rod.
The position that can be convenient for spray the shower nozzle is adjusted, has reduced the regulation degree of difficulty that the shower nozzle sprayed the scope, and then makes this shower nozzle can spray different positions department, has increased the scope of spraying of this shower nozzle.
Preferably, welded connection between locating piece and the shallow, the articulated door that opens and shuts in water tank top can be convenient for carry out the water injection to water tank inside, has reduced the degree of difficulty of the inside water injection of water tank.
Preferably, the input of fan and the output electric connection of commercial power, welded connection between rose box and the water tank, connecting pipe one end is located inside the rose box, can be convenient for filter the gas that has dust after the absorption, has reduced gaseous filtration degree of difficulty.
Preferably, the internal diameter of the lantern ring is equal to the external diameter of the corrugated pipe, the corrugated pipe is located inside the lantern ring, the corrugated pipe can be conveniently installed, and the installation difficulty of the corrugated pipe is reduced.
The trolley is characterized in that a positioning strip is welded in the middle of one side of the back of the trolley, a movable column is symmetrically and slidably connected to the two sides of the top end of the positioning strip, a limiting strip is welded in the middle of the top end of the movable column, and a concave plate is welded in the middle of the bottom end of the movable column.
Preferably, the water suction roller is rotatably connected to the middle part inside the concave plate.
Preferably, a return spring is welded on the outer surface of the moving column at a position corresponding to the position between the concave plate and the positioning strip.
Can be convenient for adsorb subaerial water stain, reduced subaerial water stain interference to user of service to the user of being convenient for trample subaerial.
Preferably, be welded connection between reset spring and concave plate and the location strip, it is spacing through spacing and concave plate between removal post and the location strip, can be convenient for prevent that reset spring's position from taking place the phenomenon of removal.
Compared with the prior art, the invention has the beneficial effects that: the invention has scientific and reasonable structure and safe and convenient use:
1. through water tank, suction pump, water pipe, bellows, shower nozzle, fan, connecting pipe, tapered cover and rose box, utilize two kinds of modes of spraying dust removal and dust absorption, can carry out the dust fall to the gas that contains the dust of being convenient for, increased dust fall efficiency, and two dust fall modes can freely switch over, and then the device of being convenient for uses the different regional insides of different scopes, has increased the device's application scope.
2. Through the lantern ring, threaded rod, sleeve pipe, telescopic link and locating piece, can be convenient for adjust the position that the shower nozzle sprayed, reduced the regulation degree of difficulty that the shower nozzle sprayed the scope, and then make this shower nozzle can spray different positions department, increased the scope of spraying of this shower nozzle.
3. Through location strip, removal post, spacing strip, notch plate, suction roll and reset spring, can be convenient for adsorb subaerial water stain, reduced subaerial water stain interference to user to convenient to use personnel trample subaerially.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic structural view of a sprinkling and dust-collecting type dust-settling device for demolishing a house according to the present invention;
FIG. 2 is a schematic view of the mounting structure of the return spring of the sprinkling dust-collecting type dust-settling device for dismantling the house;
FIG. 3 is a schematic view of the installation structure of the casing of the sprinkling and dust-collecting type dust-settling device for dismantling the house;
reference numbers in the figures: 1. pushing a cart; 2. a water tank; 3. a water pump; 4. a water pipe; 5. a bellows; 6. a spray head; 7. a collar; 8. a threaded rod; 9. a sleeve; 10. positioning blocks; 11. a positioning bar; 12. moving the column; 13. a limiting strip; 14. a concave plate; 15. a suction roll; 16. a return spring; 17. a fan; 18. a connecting pipe; 19. a conical cover; 20. a filter box; 21. a telescopic rod.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example (b): as shown in fig. 1-3, the invention provides the following technical scheme that the sprinkling and dust-absorbing type dust-settling device for house demolition comprises a cart 1, wherein a water tank 2 is arranged in the middle of the top end of the cart 1, one end of the water tank 2 is connected with a water pump 3, the input end of the water pump 3 is electrically connected with the output end of commercial power, the water outlet of the water pump 3 is connected with a water pipe 4 through threads, one end of the water pipe 4 is connected with a corrugated pipe 5, one end of the corrugated pipe 5 is connected with a spray head 6, one side of the top end of the water tank 2 is provided with a fan 17, the input end of the fan 17 is electrically connected with the output end of the commercial power, the filter box 20 is welded with the water tank 2, one end of a connecting pipe 18 is positioned inside the filter box 20, so that collected gas can be conveniently;
through water tank 2, suction pump 3, water pipe 4, bellows 5, shower nozzle 6, fan 17, connecting pipe 18, tapered cover 19 and rose box 20, utilize two kinds of modes of spraying dust removal and dust absorption, can carry out the dust fall to the gas that contains the dust of being convenient for, increased dust fall efficiency, and two dust fall modes can freely switch over, and then the device of being convenient for uses the different regional insides of different scopes, increased the device's application scope.
5 surface cup joints the lantern ring 7 of bellows, the internal diameter of the lantern ring 7 equals the external diameter of bellows 5, bellows 5 is located inside the lantern ring 7, the installation of bellows 5 of can being convenient for, the installation degree of difficulty of bellows 5 has been reduced, 7 bottom middle part welding of the lantern ring has threaded rod 8, 8 surface bottoms of threaded rod have sleeve pipe 9 through threaded connection, the middle part welding in sleeve pipe 9 top has telescopic link 21, 21 bottom middle part welding of telescopic link has locating piece 10, welded connection between locating piece 10 and the shallow 1, 2 tops of water tank articulate has the shutter, can be convenient for carry out the water injection to 2 insides of water tank, the degree of difficulty of the inside.
Through lantern ring 7, threaded rod 8, sleeve pipe 9, telescopic link 21 and locating piece 10, can be convenient for adjust the position that shower nozzle 6 sprayed, reduced the regulation degree of difficulty that shower nozzle 6 sprayed the scope, and then make this shower nozzle 6 spray different positions department, increased this shower nozzle 6's the scope of spraying.
The welding of 1 back one side middle part of shallow has location strip 11, 11 top bilateral symmetry sliding connection of location strip has removal post 12, the welding of 12 top middle parts of removal post has spacing strip 13, the welding of 12 bottom middle parts of removal post has concave plate 14, the inside middle part of concave plate 14 rotates and is connected with water absorbing roller 15, it has reset spring 16 to remove the welding of 12 surface correspondence concave plate 14 and location strip position department between 11, be welded connection between reset spring 16 and concave plate 14 and the location strip 11, it is spacing through spacing strip 13 and concave plate 14 between 12 and the location strip 11 to remove, can be convenient for carry on spacingly to reset spring 16, prevent that the position of reset spring 16 from taking place the phenomenon of removing.
Through location strip 11, removal post 12, spacing 13, concave plate 14, water absorption roller 15 and reset spring 16, can be convenient for adsorb subaerial water stain, reduced subaerial water stain interference to user of service to convenient to use personnel trample subaerial.
The working principle and the using process of the invention are as follows: in the actual use process of the water spraying and dust collecting type dust settling device, firstly, a user opens the fan 17, the fan 17 drives gas containing dust to enter the connecting pipe 18 along the conical cover 19 during the operation, and the gas enters the filter box 20 along the connecting pipe 18, so that the dust collection purpose is achieved, then the user closes the fan 17, the water suction pump 3 is connected with a power supply and starts to operate, the water inside the water tank 2 is driven to enter the water pipe 4 during the operation of the water suction pump 3, the water inside the water pipe 4 enters the corrugated pipe 5, so that the water inside the corrugated pipe 5 is discharged along the spray head 6, the purpose of spraying and dust collection is achieved, the dust settling device can settle the gas containing dust conveniently by utilizing two modes of spraying and dust collection, the dust settling efficiency is increased, the two dust settling modes can be freely switched, and the device can be conveniently used in different areas in different ranges, the application range of the device is increased;
then a user pulls the telescopic rod 21, the telescopic rod 21 drives the sleeve 9 when moving, the sleeve 9 drives the threaded rod 8 to move when moving, then the user rotates the threaded rod 8 along the inside of the sleeve 9, the threaded rod 8 drives the lantern ring 7 to rotate when rotating, and the lantern ring 7 drives the corrugated pipe 5 to rotate when rotating, so that the angle of the spray head 6 is adjusted, the spraying position of the spray head 6 can be conveniently adjusted, the adjusting difficulty of the spraying range of the spray head 6 is reduced, the spray head 6 can spray at different positions, and the spraying range of the spray head 6 is enlarged;
simultaneously because the tension effect of reset spring 16 drives concave plate 14 and removes down, concave plate 14 drives when removing and removes post 12 along 11 inside removals of location strip to concave plate 14 drives suction roll 15 and ground contact this moment, thereby can adsorb subaerial water stain, can be convenient for adsorb subaerial water stain, has reduced subaerial water stain to user of service's interference, thereby convenient to use personnel trample subaerially.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The house is demolishd with watering dust absorption formula dust device, including shallow (1), its characterized in that: shallow (1) top middle part is provided with water tank (2), water tank (2) one end is connected with suction pump (3), the input of suction pump (3) and the output electric connection of commercial power, there is water pipe (4) water outlet of suction pump (3) through threaded connection, water pipe (4) one end is connected with bellows (5), bellows (5) one end is connected with shower nozzle (6), fan (17) are installed to water tank (2) top one side.
2. A sprinkler dust-collecting type dust-settling device for demolishing houses according to claim 1, wherein one end of the fan (17) is connected with a conical cover (19) through a connecting pipe (18), and the other end of the fan (17) is connected with a filtering tank (20) through the connecting pipe (18).
3. The house is demolishd and is used watering dust absorption formula dust device according to claim 2, characterized in that, the lantern ring (7) has been cup jointed to bellows (5) surface, threaded rod (8) have been welded in lantern ring (7) bottom middle part, threaded rod (8) surface bottom has sleeve pipe (9) through threaded connection, sleeve pipe (9) top middle part has been welded telescopic link (21), telescopic link (21) bottom middle part has been welded locating piece (10).
4. The sprinkling and dust-absorbing type dust-settling device for house demolition according to claim 3, wherein the positioning block (10) is welded to the cart (1), and the top end of the water tank (2) is hinged to an opening and closing door.
5. A watering and dust-collecting type dust-settling device for house demolition according to claim 4, wherein the input end of the fan (17) is electrically connected with the output end of the commercial power, the filter box (20) is welded to the water tank (2), and one end of the connecting pipe (18) is located inside the filter box (20).
6. A sprinkler dust fall apparatus for demolition of houses according to claim 5 where the inner diameter of the collar (7) is equal to the outer diameter of the bellows (5) and the bellows (5) is located inside the collar (7).
7. The house is demolishd and is used watering dust absorption formula dust device of claim 6, characterized in that, shallow (1) back one side middle part welding has a location strip (11), location strip (11) top bilateral symmetry sliding connection has a removal post (12), removal post (12) top middle part welding has spacing strip (13), removal post (12) bottom middle part welding has notch plate (14).
8. A watering and dust-collecting type dust fall device for house demolition according to claim 7, wherein a water suction roller (15) is rotatably connected to the middle inside the concave plate (14).
9. A watering and dust-collecting type dust fall device for house demolition according to claim 8, wherein a return spring (16) is welded to the outer surface of the movable column (12) at a position corresponding to the space between the concave plate (14) and the positioning strip (11).
10. A sprinkling and dust-absorbing type dust-settling device for house demolition according to claim 9, wherein the return spring (16) and the concave plate (14) are connected with the positioning bar (11) in a welding manner, and the movable column (12) and the positioning bar (11) are limited by the limiting bar (13) and the concave plate (14).
CN202011526346.7A 2020-12-22 2020-12-22 House is demolishd with watering dust absorption formula dust device Pending CN112807898A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011526346.7A CN112807898A (en) 2020-12-22 2020-12-22 House is demolishd with watering dust absorption formula dust device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011526346.7A CN112807898A (en) 2020-12-22 2020-12-22 House is demolishd with watering dust absorption formula dust device

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Publication Number Publication Date
CN112807898A true CN112807898A (en) 2021-05-18

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CN202011526346.7A Pending CN112807898A (en) 2020-12-22 2020-12-22 House is demolishd with watering dust absorption formula dust device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113599937A (en) * 2021-08-23 2021-11-05 深圳永恒工程开发有限公司 Efficient dust settling system and dust settling process for house demolition
CN113731705A (en) * 2021-08-17 2021-12-03 中国十七冶集团有限公司 Dust fall equipment for municipal works convenient to remove

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Publication number Priority date Publication date Assignee Title
JP2001095738A (en) * 1999-09-30 2001-04-10 Amano Corp Air and water separator floor washer
JP2001187353A (en) * 1999-12-28 2001-07-10 Amano Corp Gas-liquid separator, floor surface scrubber and floor surface cleaner
KR20160067247A (en) * 2014-12-03 2016-06-14 영산대학교산학협력단 A dustproof device for tunneling work
CN106798532A (en) * 2017-02-28 2017-06-06 广州市龙能物业管理发展有限公司 A kind of water absorption type floor water wiper
CN209900940U (en) * 2019-04-25 2020-01-07 黄秋怡 Building construction building site dust removal atomizer
CN210057738U (en) * 2019-05-14 2020-02-14 刘涛 Dust device for public building construction
KR20200091620A (en) * 2019-01-23 2020-07-31 (주)대현엔텍 System for removing dust
CN211212933U (en) * 2019-05-14 2020-08-11 湖州师范学院 Household floor sweeping and mopping robot
CN211796248U (en) * 2020-03-17 2020-10-30 淮安信息职业技术学院 Cleaning base for service robot
CN212091469U (en) * 2020-04-06 2020-12-08 华润建筑有限公司 Dust removal atomizer for building site
CN212091350U (en) * 2019-12-18 2020-12-08 山西路桥建设集团有限公司 Highway construction is with filtration formula watering dust device

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001095738A (en) * 1999-09-30 2001-04-10 Amano Corp Air and water separator floor washer
JP2001187353A (en) * 1999-12-28 2001-07-10 Amano Corp Gas-liquid separator, floor surface scrubber and floor surface cleaner
KR20160067247A (en) * 2014-12-03 2016-06-14 영산대학교산학협력단 A dustproof device for tunneling work
CN106798532A (en) * 2017-02-28 2017-06-06 广州市龙能物业管理发展有限公司 A kind of water absorption type floor water wiper
KR20200091620A (en) * 2019-01-23 2020-07-31 (주)대현엔텍 System for removing dust
CN209900940U (en) * 2019-04-25 2020-01-07 黄秋怡 Building construction building site dust removal atomizer
CN210057738U (en) * 2019-05-14 2020-02-14 刘涛 Dust device for public building construction
CN211212933U (en) * 2019-05-14 2020-08-11 湖州师范学院 Household floor sweeping and mopping robot
CN212091350U (en) * 2019-12-18 2020-12-08 山西路桥建设集团有限公司 Highway construction is with filtration formula watering dust device
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CN212091469U (en) * 2020-04-06 2020-12-08 华润建筑有限公司 Dust removal atomizer for building site

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113731705A (en) * 2021-08-17 2021-12-03 中国十七冶集团有限公司 Dust fall equipment for municipal works convenient to remove
CN113599937A (en) * 2021-08-23 2021-11-05 深圳永恒工程开发有限公司 Efficient dust settling system and dust settling process for house demolition

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Application publication date: 20210518

RJ01 Rejection of invention patent application after publication