CN111841211A - Dust suppression device - Google Patents

Dust suppression device Download PDF

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Publication number
CN111841211A
CN111841211A CN202010734422.7A CN202010734422A CN111841211A CN 111841211 A CN111841211 A CN 111841211A CN 202010734422 A CN202010734422 A CN 202010734422A CN 111841211 A CN111841211 A CN 111841211A
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CN
China
Prior art keywords
fog gun
electric box
base
top end
dust
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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
CN202010734422.7A
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Chinese (zh)
Inventor
李志成
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.)
Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to CN202010734422.7A priority Critical patent/CN111841211A/en
Publication of CN111841211A publication Critical patent/CN111841211A/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
    • 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
    • B01D47/16Apparatus having rotary means, other than rotatable nozzles, for atomising the cleaning liquid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/06Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
    • F16F15/067Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)

Abstract

The invention discloses a dust suppression device which comprises a base, wherein four corners of the bottom end of the base are connected with movable wheels, an electric box is arranged at the top of the base, the inner side of the electric box is connected with a water pump, one side of the water pump is connected with an external water pipe, a fog gun support base is arranged at the top of the electric box, fog gun supports are connected to two sides of the top end of the fog gun support base, and a hydraulic push rod is arranged at the top end of the fog gun support base. According to the invention, through the gear ring, the gear, the motor, the annular sliding groove, the annular sliding block, the supporting ring and the rotating seat, when the fog gun sprays and suppresses dust, the rotating seat and the electric box at the top end of the rotating seat can be conveniently rotated, so that the fog gun at the top of the electric box can be rotated on a construction site to spray and suppress dust, the dust suppression range of the dust suppression device is improved, manual rotation of the fog gun is not needed, the automation degree is higher, and the working efficiency of the dust suppression device is improved.

Description

Dust suppression device
Technical Field
The invention relates to the technical field of building construction equipment, in particular to a dust suppression device.
Background
The building construction refers to the production activities in the engineering construction implementation stage and is the construction process of various buildings. The site dust raising refers to dust raised on a construction site due to large-scale operations such as old building dismantling, foundation excavation, bulldozing and soil filling, building material processing, personnel and vehicle activities and the like in the building construction process; the site dust mainly comprises inhalable particles such as PM2.5 and PM10 and large solid particles with the diameter larger than 10 microns; therefore, dust generated in a construction site cannot be well treated, which not only deteriorates a construction environment, but also may have a certain influence on the health of a constructor. At present, the raised dust is treated by a fog gun on a construction site.
At present, various dust suppression devices for construction sites exist in the market, but the dust suppression devices generally only can adjust the angle of the fog gun up and down, but cannot conveniently enable the fog gun to rotate so as to suppress dust on the construction sites in different directions, and the fog gun can generate large noise and vibration when working. Accordingly, those skilled in the art have provided a dust suppressing apparatus to solve the problems set forth in the background art described above.
Disclosure of Invention
The present invention is directed to a dust suppression device to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
a dust suppression device comprises a base, wherein four corners of the bottom end of the base are respectively connected with a movable wheel, the top of the base is provided with an electric box, the inner side of the electric box is connected with a water pump, one side of the water pump is connected with an external water pipe, the top of the electric box is provided with a fog gun bracket seat, the fog gun support is characterized in that the two sides of the top end of the fog gun support base are both connected with a fog gun support, the top end of the fog gun support base is provided with a hydraulic push rod, one side of each of the two fog gun supports is commonly connected with a fog gun, the top end of the base is connected with a supporting ring, the top end of the base is provided with an installation groove, and the inside of the mounting groove is provided with a motor, the top end of the supporting ring is provided with an annular slide block, the bottom end of the electric box is connected with a rotating seat, the edge position of the bottom end of the rotating seat is provided with an annular sliding groove, the bottom end of the rotating seat is provided with a gear ring, and the top end of the motor is provided with a gear.
Further, a plurality of damping springs are arranged on the top end of the electric box at equal intervals, sliding grooves are formed in the tops of two sides of the electric box, damping plates are connected to two sides of the fog gun support base, and sliding blocks are installed on one sides, close to each other, of the damping plates.
Further, a fan housing is arranged on the inner side of the electric box, a ventilation pipe is connected to one side of the fan housing, a fan is installed on the inner side of the fan housing, and a wind collecting cover is connected to one side of the outer side of the fog gun.
Furthermore, the annular sliding block is connected with the inside of the annular sliding groove, the rotating seat is connected with the supporting circular ring in a rotating mode through the matching of the annular sliding groove and the annular sliding block, and the outer side of the gear is connected with the inner side of the gear ring in a meshed mode.
Further, damping spring's bottom is connected with the top of electric box, damping spring's top is connected with the bottom of fog gun support frame seat, the slider is connected with the inside of spout, the cooperation sliding connection that damping plate and electric box pass through slider and spout.
Furthermore, one end of the ventilation pipe is connected with the inside of the fan housing, the other end of the ventilation pipe is connected with the inside of the wind collecting cover, and the opening position of the fan housing corresponds to the position of the water pump.
Furthermore, two reaction plates are connected to two sides of the top end of the base, a hydraulic jack is installed at the bottom end of each reaction plate, and a supporting plate is arranged at the bottom end of each hydraulic jack.
Furthermore, a hinge is arranged between the hydraulic jack and the support plate, the hydraulic jack is rotatably connected with the support plate through the hinge, and the bottom end of the support plate is provided with an anti-skid pad.
Compared with the prior art, the invention has the beneficial effects that:
1. through ring gear, motor, annular spout, annular slider, support ring and rotation seat, when fog gun spraying presses down dirt, can be convenient messenger rotate the seat and rotate the electric box on its top to make the fog gun at electric box top can rotate in the job site and spray and press down the dirt, thereby improved this dust suppression device's the dirt scope that presses down, need not the manual work and rotate the fog gun, degree of automation is higher, thereby has improved this dust suppression device's work efficiency.
2. At fog gun during operation, its itself can produce vibrations and noise of certain range, when fog gun vibrations, through damping spring, the slider, spout and shock attenuation board, can be convenient for fog gun support frame seat shock attenuation, in order to reach for fog gun absorbing purpose, through the ventilation pipe, the air-collecting cover, fan and fan housing, work for a long time at the water pump, and its temperature risees, the fan can be convenient contain the air-blowing at the surface of water pump through fog gun spun water smoke with air-collecting cover department, for the water pump cooling, thereby improve the life of water pump.
3. Due to the fact that the environment of a construction site is complex, the base can topple and shift on the construction site, and the dust suppression device can be conveniently and stably arranged on the ground of the construction site through the hydraulic jack, the supporting plate, the hinge and the reaction plate.
Drawings
FIG. 1 is a schematic view showing a construction of a dust suppressing device proposed in embodiments 1 and 2;
FIG. 2 is an enlarged view of A in a dust suppressing device proposed in example 1;
fig. 3 is a partial structural schematic view of a reaction plate, a hydraulic jack and a support plate in the dust suppression device provided in embodiment 2.
In the figure: 1. a base; 2. a moving wheel; 3. a hydraulic jack; 4. a reaction plate; 5. a rotating seat; 6. is externally connected with a water pipe; 7. a water pump; 8. a slider; 9. a fog gun support base; 10. a hydraulic push rod; 11. a fog gun support; 12. fog gun; 13. a wind collecting cover; 14. a damper plate; 15. a damping spring; 16. a fan; 17. a fan housing; 18. a chute; 19. a vent pipe; 20. an electric box; 21. a support plate; 22. a gear; 23. a toothed ring; 24. an annular chute; 25. an annular slider; 26. a motor; 27. a support ring; 28. and (4) a hinge.
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. 1-2, in the embodiment of the invention, a dust suppression device comprises a base 1, moving wheels 2 are connected to four corners of the bottom end of the base 1, an electric box 20 is arranged on the top of the base 1, a water pump 7 is connected to the inner side of the electric box 20, an external water pipe 6 is connected to one side of the water pump 7, a fog gun support base 9 is arranged on the top of the electric box 20, fog gun supports 11 are connected to two sides of the top end of the fog gun support base 9, a hydraulic push rod 10 is arranged on the top end of the fog gun support base 9, fog guns 12 are connected to one side of the two fog gun supports 11 together, a support ring 27 is connected to the top end of the base 1, a mounting groove is formed in the top end of the base 1, a motor 26 is arranged inside the mounting groove, an annular slide block 25 is arranged on the top end of the support ring 27, a rotating base 5, the bottom end of the rotating seat 5 is provided with a toothed ring 23, and the top end of the motor 26 is provided with a gear 22.
Wherein, the top equidistance of electric box 20 is provided with a plurality of damping spring 15, and spout 18 has all been seted up at the top of electric box 20 both sides, and the both sides of fog gun support seat 9 all are connected with damping plate 14, and slider 8 is all installed to one side that two damping plate 14 are close to each other.
Wherein, the inner side of the electric box 20 is provided with a fan housing 17, one side of the fan housing 17 is connected with a ventilation pipe 19, the inner side of the fan housing 17 is provided with a fan 16, and one side of the outer side of the fog gun 12 is connected with a wind-collecting cover 13.
Wherein, the annular slide block 25 is connected with the inside of the annular slide groove 24, the rotating seat 5 is connected with the supporting ring 27 in a rotating way through the matching of the annular slide groove 24 and the annular slide block 25, and the outer side of the gear 22 is connected with the inner side of the gear ring 23 in a meshing way.
Wherein, damping spring 15's bottom is connected with the top of electric box 20, and damping spring 15's top is connected with the bottom of fog gun support frame seat 9, and slider 8 is connected with the inside of spout 18, and damping plate 14 passes through the cooperation sliding connection of slider 8 and spout 18 with electric box 20.
One end of the ventilation pipe 19 is connected with the inside of the fan housing 17, the other end of the ventilation pipe 19 is connected with the inside of the wind collecting cover 13, and the opening position of the fan housing 17 corresponds to the position of the water pump 7.
The working principle is as follows: when the dust suppression device is used, firstly, the fog gun 12 is moved to a construction site through the moving wheel 2, the angle of the fog gun 12 is adjusted through the hydraulic push rod 10, the external water pipe 6 is communicated with an external water source, the water pump 7 is turned on, the water pump 7 works and conveys water to the fog gun 12, the fog gun 12 atomizes and sprays water to perform dust suppression operation, in order to enable the fog gun 12 to suppress dust in the construction site in a wider range, the motor 26 can be turned on, the gear 22 connected with the motor 26 is driven by the output shaft of the motor 26 to move in the gear ring 23, the gear 22 brakes the gear ring 23, the gear ring 23 drives the rotating seat 5 connected with the top end thereof to rotate at the top end of the supporting ring 27 through the annular sliding chute 24 and the annular sliding block 25, so that the electric box 20 at the top end of the rotating seat 5 rotates, and the fog gun 12 at the top end of the electric box 20 can rotate at the construction site to perform spraying dust suppression, therefore, the dust suppression range of the dust suppression device is improved, when the fog gun 12 works, vibration and noise with certain amplitude can be generated, when the fog gun 12 vibrates, the damping plates 14 connected to two sides of the fog gun support base 9 fixedly provided with the fog gun 12 move up and down on the electric box 20 in a small amplitude through the damping springs 15, the sliding grooves 18 and the sliding blocks 8 to damp the fog gun support base 9, and therefore the purpose of damping the fog gun 12 is achieved, when the water pump 7 works for a long time, the temperature of the water pump rises, the fan 16 is turned on, the fan 16 works, air containing water mist sprayed out of the fog gun 12 at the wind collection cover 13 is sucked into the fan housing 17 through the ventilating pipe 19 and blown to the surface of the water pump 7, and further the temperature of the water pump 7 is reduced, and the service life of the water pump 7 is prolonged.
Example 2
Referring to fig. 1 and 3, the dust suppression device of this embodiment, compare embodiment 1, still include that the both sides at base 1 top all are connected with two reaction plates 4, and hydraulic jack 3 is installed to the bottom of reaction plate 4, and the bottom of hydraulic jack 3 is provided with backup pad 21.
Wherein, a hinge 28 is arranged between the hydraulic jack 3 and the support plate 21, the hydraulic jack 3 is rotatably connected with the support plate 21 through the hinge 28, and the bottom end of the support plate 21 is provided with a non-slip mat.
The working principle is as follows: because the construction site environment is complicated, the base 1 may topple over and shift in the construction site, at this time, after the base 1 is moved to a specified position, the four hydraulic jacks 3 are opened, so that the hydraulic jacks 3 drive the support plates 21 connected with the hydraulic jacks to move towards the ground and abut against the ground until the moving wheels 2 are separated from the ground, and the support plates 21 can be supported on the inclined ground through the hinges 28 arranged between the hydraulic jacks 3 and the support plates 21.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. A dust suppression device comprises a base (1), wherein four corners of the bottom of the base (1) are connected with movable wheels (2), an electric box (20) is arranged at the top of the base (1), a water pump (7) is connected to the inner side of the electric box (20), an external water pipe (6) is connected to one side of the water pump (7), a fog gun support base (9) is arranged at the top of the electric box (20), fog gun supports (11) are connected to two sides of the top end of each fog gun support base (9), a hydraulic push rod (10) is arranged at the top end of each fog gun support base (9), one sides of the two fog gun supports (11) are connected with a fog gun (12) together, the dust suppression device is characterized in that the top end of the base (1) is connected with a supporting circular ring (27), a mounting groove is formed in the top end of the base (1), and a motor (26) is, support the top of ring (27) and install annular slider (25), the bottom of electric box (20) is connected with rotates seat (5), rotate the border position of seat (5) bottom and seted up annular spout (24), change the bottom of seat (5) and install ring gear (23), the top of motor (26) is provided with gear (22).
2. A dust suppressing device as defined in claim 1, characterized in that a plurality of damping springs (15) are equidistantly arranged on the top end of the electric box (20), sliding grooves (18) are respectively formed on the top of two sides of the electric box (20), damping plates (14) are respectively connected to two sides of the fog gun support base (9), and a sliding block (8) is respectively arranged on the side where the two damping plates (14) are close to each other.
3. A dust suppressing device as defined in claim 1, characterized in that a fan housing (17) is arranged at the inner side of the electric box (20), a ventilation pipe (19) is connected to one side of the fan housing (17), a fan (16) is installed at the inner side of the fan housing (17), and a wind collecting cover (13) is connected to one side of the outer side of the fog gun (12).
4. A dust suppressing device as defined in claim 1, characterized in that said annular slider (25) is connected to the inside of the annular runner (24), said rotary holder (5) is rotatably connected to the support ring (27) through the cooperation of the annular runner (24) and the annular slider (25), and the outside of said gear wheel (22) is in meshed connection with the inside of the toothed ring (23).
5. A dust suppressing device as defined in claim 2, characterized in that the bottom end of said damping spring (15) is connected to the top end of the electric box (20), the top end of said damping spring (15) is connected to the bottom end of the fog gun support base (9), said slider (8) is connected to the inside of the sliding groove (18), and said damping plate (14) is slidably connected to the electric box (20) through the cooperation of the slider (8) and the sliding groove (18).
6. A dust suppressing device as defined in claim 3, characterized in that one end of said ventilation pipe (19) is connected to the inside of a fan housing (17), the other end of said ventilation pipe (19) is connected to the inside of a wind collecting cover (13), and the opening position of said fan housing (17) corresponds to the position of the water pump (7).
7. A dust suppressing device as defined in claim 1, characterized in that two reaction plates (4) are connected to both sides of the top end of the base (1), a hydraulic jack (3) is installed at the bottom end of the reaction plates (4), and a support plate (21) is installed at the bottom end of the hydraulic jack (3).
8. A dust suppressing device as claimed in claim 7, characterized in that a hinge (28) is arranged between the hydraulic jack (3) and the support plate (21), the hydraulic jack (3) and the support plate (21) are rotatably connected by the hinge (28), and the bottom end of the support plate (21) is provided with a non-slip mat.
CN202010734422.7A 2020-07-27 2020-07-27 Dust suppression device Pending CN111841211A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010734422.7A CN111841211A (en) 2020-07-27 2020-07-27 Dust suppression device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010734422.7A CN111841211A (en) 2020-07-27 2020-07-27 Dust suppression device

Publications (1)

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CN111841211A true CN111841211A (en) 2020-10-30

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Application Number Title Priority Date Filing Date
CN202010734422.7A Pending CN111841211A (en) 2020-07-27 2020-07-27 Dust suppression device

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CN (1) CN111841211A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021083415A3 (en) * 2020-12-19 2021-10-14 苏州赛荣建筑装饰工程有限公司 Fog cannon for building construction use

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109011943A (en) * 2018-08-24 2018-12-18 王国成 A kind of construction site dust-extraction unit
CN208599387U (en) * 2018-05-09 2019-03-15 李亚雄 A kind of afforestation maintenance dedusting mist-spraying cooling fan
CN209646111U (en) * 2019-01-07 2019-11-19 浙江臻泽建设有限公司 A kind of dust-extraction unit
CN209869076U (en) * 2019-02-22 2019-12-31 自贡市汇丰石业有限公司 Stone material bead cutter
CN210332096U (en) * 2019-08-08 2020-04-17 李威 Dust collector that building engineering used
CN210874583U (en) * 2019-07-30 2020-06-30 合肥学院 Environment-friendly treatment equipment capable of effectively reducing dust
CN211051145U (en) * 2019-07-11 2020-07-21 庆阳进源机械设备制造有限公司 Reciprocating type pivoted dust removal fog gun machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208599387U (en) * 2018-05-09 2019-03-15 李亚雄 A kind of afforestation maintenance dedusting mist-spraying cooling fan
CN109011943A (en) * 2018-08-24 2018-12-18 王国成 A kind of construction site dust-extraction unit
CN209646111U (en) * 2019-01-07 2019-11-19 浙江臻泽建设有限公司 A kind of dust-extraction unit
CN209869076U (en) * 2019-02-22 2019-12-31 自贡市汇丰石业有限公司 Stone material bead cutter
CN211051145U (en) * 2019-07-11 2020-07-21 庆阳进源机械设备制造有限公司 Reciprocating type pivoted dust removal fog gun machine
CN210874583U (en) * 2019-07-30 2020-06-30 合肥学院 Environment-friendly treatment equipment capable of effectively reducing dust
CN210332096U (en) * 2019-08-08 2020-04-17 李威 Dust collector that building engineering used

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021083415A3 (en) * 2020-12-19 2021-10-14 苏州赛荣建筑装饰工程有限公司 Fog cannon for building construction use

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Application publication date: 20201030

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