CN111672240A - City prevents haze dust safety control sprinker - Google Patents

City prevents haze dust safety control sprinker Download PDF

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Publication number
CN111672240A
CN111672240A CN202010564483.3A CN202010564483A CN111672240A CN 111672240 A CN111672240 A CN 111672240A CN 202010564483 A CN202010564483 A CN 202010564483A CN 111672240 A CN111672240 A CN 111672240A
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CN
China
Prior art keywords
water
water spraying
pipe
water tank
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.)
Withdrawn
Application number
CN202010564483.3A
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Chinese (zh)
Inventor
李佳旺
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Individual
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Individual
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Priority to CN202010564483.3A priority Critical patent/CN111672240A/en
Publication of CN111672240A publication Critical patent/CN111672240A/en
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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
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01HSTREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H3/00Applying liquids to roads or like surfaces, e.g. for dust control; Stationary flushing devices
    • E01H3/02Mobile apparatus, e.g. watering-vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/45Gas separation or purification devices adapted for specific applications
    • B01D2259/455Gas separation or purification devices adapted for specific applications for transportable use
    • B01D2259/4558Gas separation or purification devices adapted for specific applications for transportable use for being employed as mobile cleaners for ambient air, i.e. the earth's atmosphere

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Catching Or Destruction (AREA)

Abstract

The invention discloses a city haze dust prevention safety control water spraying vehicle, which belongs to the field of atmospheric pollution control and comprises a water spraying vehicle body, wherein a water tank is installed on the water spraying vehicle body, the water tank is communicated with an air suction pipe, an air suction hopper is arranged at the inlet end of the air suction pipe, a spray bar is arranged at the outlet end of the air suction pipe, a stirring motor is installed on the water tank, the output shaft of the stirring motor is connected with a rotating shaft, a stirring blade is installed on the rotating shaft, the stirring blade is arranged inside the water tank, a water inlet pipe is installed on the water tank, a water suction pump is installed on the water inlet pipe, a water spraying pipe is arranged on the water tank, a water spraying disc is movably arranged. The vehicle disclosed by the invention is convenient to absorb and filter dust in the air, spray dust on a road surface, avoid flying of the dust and the like, avoid the influence of the dust on the atmosphere, reduce the occurrence of haze and the like, improve the safety of the surrounding environment of people, increase the environment-friendly effect and facilitate use.

Description

City prevents haze dust safety control sprinker
Technical Field
The invention relates to the field of atmospheric pollution control, in particular to a city haze dust prevention safety control water spraying vehicle.
Background
Atmospheric pollution is a phenomenon that certain substances enter the atmosphere due to human activities or natural processes, present sufficient concentration and reach sufficient time and therefore harm the comfort, health and welfare of human bodies or the environment, pollutants enter the atmosphere from artificial sources or natural sources, participate in the circulation process of the atmosphere, and are removed from the atmosphere through chemical reactions, biological activities and physical sedimentation in the atmosphere after a certain retention time. If the output rate is less than the input rate, it will accumulate relatively in the atmosphere, causing an increase in the concentration of a substance in the atmosphere. When the concentration is increased to a certain degree, acute and chronic harm can be caused to people, organisms or materials directly or indirectly, the atmospheric pollutants act on the human body for a long time, genetic materials in the human body can be damaged, mutation can be caused, tumor carcinogenesis can be induced, the health and safety of people can be influenced, the life of people can be shortened, and meanwhile, the ecological environment can be easily damaged.
A large amount of dust is often produced in the current city, and often inhale the dust and can lead to respiratory system diseases such as rhinitis, pharyngolaryngitis, and is really very serious to the injury of human body, and the dust on ground can only be administered to current prevent that haze dust administers the device generally, and the dust in the air is difficult to administer, influences the effect of administering.
Disclosure of Invention
Aiming at the existing problems, the invention aims to provide a city haze dust prevention safety control water spraying vehicle to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a haze dust safety control sprinker is prevented in city, including the sprinker body, sprinker body bottom is equipped with the wheel, the sprinker body on install the water tank, water tank and breathing pipe intercommunication, the breathing pipe entrance point is equipped with the air suction fill, the setting of air suction fill is on the locomotive top of sprinker body, the breathing pipe exit end is equipped with spouts the row, spout and arrange inside the water tank bottom, install the aspiration pump on the breathing pipe, install agitator motor on the water tank, agitator motor output shaft and pivot are connected, install stirring vane in the pivot, stirring vane sets up inside the water tank, install the inlet tube on the water tank, install the suction pump on the inlet tube, be equipped with the spray pipe on the water tank, the activity of spray pipe exit end is equipped with the spray dish, water branch pipe one end and spray pipe intercommunication lead to water branch pipe, the.
As a further scheme of the invention: the bottom end of the water tank is provided with an inclined guide plate, and the lowest end of the inclined guide plate is provided with a sewage discharge pipe.
As a further scheme of the invention: and a medicament adding pipe is arranged on the water tank, and scales are arranged on the medicament adding pipe.
As a further scheme of the invention: the support is arranged on the water spraying vehicle body, the winding roller is movably arranged in the support, a handle is arranged at one end of a central shaft of the winding roller, and the water inlet pipe is wound on the winding roller.
As a further scheme of the invention: the rear side wall of the water spraying vehicle body is provided with an indicating lamp.
As a further scheme of the invention: the two groups of water spraying disks are arranged at the bottom end of the tail of the water spraying vehicle body.
As a further scheme of the invention: the rear wall of the water spraying disc is connected with one end of a telescopic rod, and the other end of the telescopic rod is arranged on the water spraying vehicle body.
Compared with the prior art, the invention has the beneficial effects that: the wheel of the invention is convenient for the device to move at any position, is convenient for treating dust at each place in a city, and is convenient for work. The during operation water tank is built-in full water, opens the aspiration pump, and through inhaling air hopper and breathing pipe air mixing the dust extraction in with the sky, spout into the water tank through spouting the row, conveniently absorb the dust in the sky water filter, avoid its atmospheric pollution of influence, reduce emergence such as haze, improve people's surrounding environment's security, increase environmental protection effect facilitates the use. The air that spouts row assurance mixed dust evenly spouts into, guarantee its and water mixture, do benefit to the dust in the deaerate, the during operation is opened agitator motor and is rotated drive pivot and stirring vane and rotate the stirring, guarantee the water intensive mixing in intake air and the water tank, do benefit to and detach the dust that contains in the intake air, the effect and the efficiency that improve the dust and administer, increase the environmental protection effect, reduce the production of atmosphere pollution such as haze, guarantee the safety of surrounding environment, conveniently in time supply the inside water of device through inlet tube and suction pump, do benefit to the normal clear of work, the during operation is taken out the water in the water tank through the spray pipe, spout from two sets of spray disks, conveniently spray the dust on the road surface, avoid the flying-up of dust etc., improve the environmental protection effect, guarantee the security, reduce the production of atmosphere pollution such as haze, increase the environmental protection effect. According to actual conditions through the inclination of two sets of water spray disc of telescopic link control, area and the angle of convenient control blowout water, the convenient going on of spraying water, the during operation passes through the inclination of lifter control sprinker body according to actual conditions, spout through the convenient water in with the water tank of water branch pipe and water spray gun, conveniently detach the dust in the air, improve effect and the efficiency that the dust was administered, increase the environmental protection effect, reduce the production of atmospheric pollution such as haze, guarantee the safety of surrounding environment, and convenient to use.
Drawings
FIG. 1 is a schematic structural diagram of a city haze dust prevention safety control water spraying vehicle.
FIG. 2 is an installation schematic diagram of a water spraying disc in a city haze dust prevention safety control water spraying vehicle.
FIG. 3 is a schematic diagram of a spraying row structure in a city haze dust prevention safety control water spraying vehicle.
In the figure: 1. the water spraying vehicle comprises a water spraying vehicle body, 2, wheels, 3, an air suction hopper, 4, an air suction pipe, 5, an air suction pump, 6, a spray row, 7, a water tank, 8, an inclined guide plate, 9, a blow-off pipe, 10, stirring blades, 11, a rotating shaft, 12, a stirring motor, 13, a medicament adding pipe, 14, a water inlet pipe, 15, a water suction pump, 16, a winding roller, 17, a support, 18, a handle, 19, a water spraying pipe, 20, a water through branch pipe, 21, a water spraying gun, 22, a lifting rod, 23, a water spraying disk, 24, a telescopic rod, 25 and an indicator light.
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.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The first embodiment is as follows: referring to fig. 1-3, a city prevents that haze dust safety governs sprinker, includes sprinker body 1, and sprinker body 1 bottom is equipped with wheel 2, and wheel 2 makes things convenient for the device to remove in any position, conveniently governs the dust in each place in the city, makes things convenient for going on of work.
Install water tank 7 on the sprinker body 1, water tank 7 and 4 intercommunications of breathing pipe, 4 entrance points of breathing pipe are equipped with the air suction fill 3, the setting of air suction fill 3 is on the locomotive top of sprinker body 1, 4 exit ends of breathing pipe are equipped with spout row 6, spout row 6 and set up inside 7 bottoms of water tank, install aspiration pump 5 on the breathing pipe 4, the during operation water tank 7 is full of water in, open aspiration pump 5, air mixing the dust extraction of overhead through air suction fill 3 and breathing pipe 4, spout into water tank 7 through spouting row 6, conveniently strain the dust absorption water in the high altitude, avoid it to influence atmospheric pollution, reduce emergence such as haze, improve people's surrounding environment's security, increase the environmental protection effect, and convenient use. The spray row 6 ensures that the air mixed with the dust is uniformly sprayed, ensures the mixing of the air and water, is beneficial to removing the dust in the air and is convenient to use.
Install agitator motor 12 on water tank 7, agitator motor 12 output shaft and pivot 11 are connected, install stirring vane 10 in the pivot 11, stirring vane 10 sets up inside water tank 7, the during operation is opened agitator motor 12 and is rotated and drive pivot 11 and stirring vane 10 and rotate the stirring, guarantee the water intensive mixing in intake air and the water tank 7, do benefit to the dust that contains in the desorption air, improve the effect and the efficiency that the dust was administered, increase the environmental protection effect, reduce the production of atmospheric pollution such as haze, guarantee the safety of surrounding environment, and is convenient to use.
An inlet pipe 14 is arranged on the water tank 7, a water suction pump 15 is arranged on the inlet pipe 14, and water in the device can be conveniently and timely supplemented through the inlet pipe 14 and the water suction pump 15, so that the normal operation of the work is facilitated, and the use is convenient.
Be equipped with spray pipe 19 on the water tank 7, 19 exit end activities of spray pipe are equipped with water spray disk 23, water spray disk 23 is equipped with two sets ofly, two sets of water spray disk 23 set up the rear of a vehicle bottom at the sprinker body 1, water spray disk 23 back wall and telescopic link 24 one end are connected, the telescopic link 24 other end sets up on the sprinker body 1, the during operation is taken out the water in water tank 7 through spray pipe 19, from two sets of water spray disk 23 blowout, the convenience sprays the dust on the road surface, avoid flying of dust etc., improve the environmental protection effect, guarantee the security, reduce the production of atmosphere pollution such as haze, increase the environmental protection effect. According to the actual conditions, the inclination angles of the two groups of water spraying discs 23 are controlled through the telescopic rod 24, the area and the angle of water spraying are conveniently controlled, water spraying is convenient to carry out, and the water spraying device is convenient to use.
Water branch pipe 20 one end and spray pipe 19 intercommunication, water branch pipe 20 other end and spray gun 21, install on the sprinker body 1 through lifter 22 in spray gun 21 bottom, the during operation passes through lifter 22 control sprinker body 1's inclination according to actual conditions, spout through water branch pipe 20 and spray gun 21 convenience water in with water tank 7 take out, conveniently detach the dust in the air, improve effect and the efficiency that the dust was administered, increase the environmental protection effect, reduce the production of atmospheric pollution such as haze, guarantee the safety of surrounding environment, and convenient to use.
Example two: go up the water tank 7 bottom on embodiment one and be equipped with slope baffle 8, the 8 lowest ends of slope baffle are equipped with blow off pipe 9, and the dust after the water filtration deposits in water tank 7, and through 8 landing of slope baffle after the work, discharge from blow off pipe 9, guarantee water tank 7's safety, facilitate the use.
Install the medicament on the water tank 7 and add pipe 13, the medicament adds and is equipped with the scale on the pipe 13, add the suitable amount of medicament of suitable kind through the medicament, the water of convenience in to the water tank 7 disinfects, guarantee the clean health of blowout water, conveniently kill the bacterium virus etc. that have in the inspiratory air simultaneously, guarantee operational environment's safety, avoid its atmospheric pollution of influence, reduce emergence such as haze, increase environmental protection effect, facilitate the use.
Be equipped with support 17 on the watering lorry body 1, support 17 internalization is equipped with wind-up roll 16, and the one end of wind-up roll 16 center pin is equipped with handle 18, and the winding of inlet tube 14 sets up on wind-up roll 16, when needs carry out the moisturizing to water tank 7, rotates wind-up roll 16 through handle 18, conveniently emits inlet tube 14, does benefit to going on of moisturizing, and the time spent convenience is packed up inlet tube 14 through wind-up roll 16, guarantees neatly, improves the security, does benefit to the use.
The rear of a vehicle lateral wall of watering lorry body 1 is equipped with pilot lamp 25, and pilot lamp 25 conveniently reminds subsequent vehicle pedestrian to notice, improves the safety of during operation, facilitates the use.
The working principle of the invention is as follows: the wheels 2 of the invention are convenient to move at any position, thus being convenient for controlling dust at each place in the city and being convenient for working. The during operation water tank 7 is filled with water, opens aspiration pump 5, and through inhaling air hopper 3 and breathing pipe 4 air mixing the dust extraction of overhead, spout into water tank 7 through spouting row 6, the dust absorption water in the convenient high altitude is strained, avoids its atmospheric pollution of influence, reduces emergence such as haze, improves people's surrounding environment's security, increases environmental protection effect, facilitates the use. The spray row 6 ensures that the air mixed with dust is uniformly sprayed, ensures the mixing of the air and water, is beneficial to removing the dust in the air, starts the stirring motor 12 to rotate to drive the rotating shaft 11 and the stirring blades 10 to rotate and stir during the work, ensures that the sucked air and the water in the water tank 7 are fully mixed, is beneficial to removing the dust contained in the sucked air, improves the dust treatment effect and efficiency, increases the environmental protection effect, reduces the generation of atmospheric pollution such as haze and the like, ensures the safety of the surrounding environment, through inlet tube 14 and suction pump 15 convenient in time supplementary device inside water, do benefit to the normal clear of work, the during operation is taken the water in the water tank 7 out through spray pipe 19, from two sets of water spray disk 23 blowout, conveniently sprays the dust on the road surface, avoids flying of dust etc. to improve the environmental protection effect, guarantees the security, reduces the production of atmospheric pollution such as haze, increases the environmental protection effect. The inclination angles of the two groups of water spraying discs 23 are controlled through the telescopic rod 24 according to actual conditions, the area and the angle of water spraying are conveniently controlled, water spraying is conveniently carried out, the inclination angle of the water spraying vehicle body 1 is controlled through the lifting rod 22 according to actual conditions during work, water in the water tank 7 is conveniently pumped out and sprayed out through the water branch pipe 20 and the water spraying gun 21, dust in air is conveniently removed, the effect and the efficiency of dust treatment are improved, the environment-friendly effect is improved, the generation of atmospheric pollution such as haze is reduced, the safety of the surrounding environment is ensured, the dust filtered by water is precipitated in the water tank 7, the dust is discharged from the sewage discharge pipe 9 through the inclined guide plate 8 after work is finished, the safety of the water tank 7 is ensured, a proper amount of chemicals of a proper type are added through the chemicals adding pipe 13, the water in the water tank 7 is conveniently disinfected and sterilized, the cleanness and sanitation of the sprayed water are ensured, and the, guarantee operational environment's safety, avoid its atmospheric pollution of influence, reduce emergence such as haze, increase environmental protection effect, when needs carry out the moisturizing to water tank 7, rotate wind-up roll 16 through handle 18, conveniently emit inlet tube 14, do benefit to going on of moisturizing, not the time spent convenience packs up inlet tube 14 through wind-up roll 16, guarantee neatly, improve the security, pilot lamp 25 conveniently reminds subsequent vehicle pedestrian to notice, safety when improving work facilitates the use.
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 (7)

1. A city haze dust prevention safety control water spraying vehicle comprises a water spraying vehicle body (1), wheels (2) are arranged at the bottom end of the water spraying vehicle body (1), and the city haze dust prevention safety control water spraying vehicle is characterized in that a water tank (7) is installed on the water spraying vehicle body (1), the water tank (7) is communicated with an air suction pipe (4), an air suction hopper (3) is arranged at the inlet end of the air suction pipe (4), the air suction hopper (3) is arranged at the top end of a vehicle head of the water spraying vehicle body (1), a spray row (6) is arranged at the outlet end of the air suction pipe (4), the spray row (6) is arranged inside the bottom end of the water tank (7), an air suction pump (5) is installed on the air suction pipe (4), a stirring motor (12) is installed on the water tank (7), an output shaft of the stirring motor (12) is connected with a rotating shaft (11), stirring blades (10) are installed on the rotating shaft, the water suction pump (15) is installed on the water inlet pipe (14), the water spraying pipe (19) is arranged on the water tank (7), the water spraying disc (23) is movably arranged at the outlet end of the water spraying pipe (19), one end of the water through branch pipe (20) is communicated with the water spraying pipe (19), the other end of the water through branch pipe (20) is communicated with the water spraying gun (21), and the bottom end of the water spraying gun (21) is installed on the water spraying vehicle body (1) through the lifting rod (22).
2. The urban haze dust prevention safety control sprinkler according to claim 1, characterized in that an inclined guide plate (8) is arranged at the bottom end of the water tank (7), and a blow-off pipe (9) is arranged at the lowest end of the inclined guide plate (8).
3. The urban haze dust prevention safety control water spraying vehicle according to claim 2, wherein a chemical adding pipe (13) is installed on the water tank (7), and scales are arranged on the chemical adding pipe (13).
4. The urban haze dust prevention safety control water spraying vehicle according to claim 3, wherein a support (17) is arranged on the water spraying vehicle body (1), a winding roller (16) is movably arranged in the support (17), a handle (18) is arranged at one end of a central shaft of the winding roller (16), and the water inlet pipe (14) is wound on the winding roller (16).
5. The urban haze dust prevention safety control sprinkler according to claim 4, wherein an indicator lamp (25) is arranged on the side wall of the tail of the sprinkler body (1).
6. The urban haze dust prevention safety control sprinkler according to claim 5, wherein the two groups of sprinkler disks (23) are arranged, and the two groups of sprinkler disks (23) are arranged at the bottom end of the tail of the sprinkler body (1).
7. The urban haze dust prevention safety control sprinkler according to claim 6, wherein the rear wall of the water spray disc (23) is connected with one end of a telescopic rod (24), and the other end of the telescopic rod (24) is arranged on the sprinkler body (1).
CN202010564483.3A 2020-06-19 2020-06-19 City prevents haze dust safety control sprinker Withdrawn CN111672240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010564483.3A CN111672240A (en) 2020-06-19 2020-06-19 City prevents haze dust safety control sprinker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010564483.3A CN111672240A (en) 2020-06-19 2020-06-19 City prevents haze dust safety control sprinker

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Publication Number Publication Date
CN111672240A true CN111672240A (en) 2020-09-18

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CN202010564483.3A Withdrawn CN111672240A (en) 2020-06-19 2020-06-19 City prevents haze dust safety control sprinker

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113356124A (en) * 2021-07-12 2021-09-07 岳红宾 Road construction is with dustproof watering equipment
CN113430981A (en) * 2021-06-29 2021-09-24 徐州山美环保科技发展有限公司 Water-saving watering device for construction
CN113529632A (en) * 2021-09-15 2021-10-22 徐州长新环境技术有限公司 Road pollution cleaning vehicle with good cleaning effect and used for street cleaning
CN114011599A (en) * 2021-11-13 2022-02-08 台州市庆丰机械股份有限公司 High-range electrostatic sprayer
CN115301027A (en) * 2022-08-15 2022-11-08 江苏朴荷生物科技有限公司 Biological membrane dust suppression equipment that receives

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113430981A (en) * 2021-06-29 2021-09-24 徐州山美环保科技发展有限公司 Water-saving watering device for construction
CN113356124A (en) * 2021-07-12 2021-09-07 岳红宾 Road construction is with dustproof watering equipment
CN113529632A (en) * 2021-09-15 2021-10-22 徐州长新环境技术有限公司 Road pollution cleaning vehicle with good cleaning effect and used for street cleaning
CN113529632B (en) * 2021-09-15 2021-12-17 徐州长新环境技术有限公司 Road pollution cleaning vehicle with good cleaning effect and used for street cleaning
CN114011599A (en) * 2021-11-13 2022-02-08 台州市庆丰机械股份有限公司 High-range electrostatic sprayer
CN115301027A (en) * 2022-08-15 2022-11-08 江苏朴荷生物科技有限公司 Biological membrane dust suppression equipment that receives
CN115301027B (en) * 2022-08-15 2024-05-24 江苏朴荷生物科技有限公司 Biological nanometer membrane dust suppression equipment

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Application publication date: 20200918

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