CN104032696A - Road washing method and system - Google Patents
Road washing method and system Download PDFInfo
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- CN104032696A CN104032696A CN201410229779.4A CN201410229779A CN104032696A CN 104032696 A CN104032696 A CN 104032696A CN 201410229779 A CN201410229779 A CN 201410229779A CN 104032696 A CN104032696 A CN 104032696A
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Abstract
The invention discloses a road washing method and system. The road washing method comprises the following steps that firstly, a ditch and a water collecting well are formed along a road, secondly, a lift pump of a washing vehicle is used for pumping clear water in the water collecting well to a water tank of the washing vehicle, thirdly, the washing vehicle washes the road through washing nozzles, and fourthly, muddy water produced after washing enters the ditch, precipitates and is purified and used circularly. According to the road washing method, the washing vehicle and a muddy water collecting, precipitating and purifying system are organically combined, although the muddy water collecting, precipitating and purifying system is added, great benefits are brought; the structure of the washing vehicle is simplified, and the washing vehicle, a watering cart and a water transporting vehicle can be used universally; cost for purchasing vehicles and operation cost are reduced; fifty percent of energy of the washing vehicle is reduced, and corresponding tail gas pollution discharge is reduced; noise pollution is lowered, the working efficiency of the washing vehicle is improved by more than one time; water can be saved by more than fifty percent due to the fact that the ditch is used for collecting the muddy water and the muddy water is recycled.
Description
Technical field
The present invention relates to road-cleaning and keep a public place clean, relate in particular to a kind of road purging method and rinse-system.
Background technology
It is the important process of city management that road-cleaning is kept a public place clean, and is also the important process that reduces traffic route airborne dust, improves atmosphere quality.At present, urban road cleaning has entered mechanical times, and various big-and-middle-sized road-sweeper quantity is more and more, generally has hundreds of to thousands of according to city size, and megalopolis will exceed ten thousand future.
More conventional road-sweeper adopts sweeping mode, and cleaning process is first the dust on road surface to be concentrated, and is then drawn in the dustbin of road-sweeper by air-introduced machine, and this cleaning mode cleaning effect is poor, and can bring a large amount of airborne dusts and dust discharge.In order to improve the clear dirt effect in road surface, to reduce traffic route dust pollution, and prevent cleaning work dust pollution, douching wheels is brought into use in increasing city.At present, more advanced douching wheels uses high-pressure pump by nozzle rinse road surface, nozzle adopts V-arrangement arrange and muddy water focused on to V-arrangement angle in the time that vehicle travels forward, and utilizes the powerful suction of high pressure positive blower that muddy water is sucked to douching wheels muddy water case and stores, and muddy water will be delivered to afterwards to special disposal site.The effect of douching wheels control dust on the roads and dust discharge is several times to tens times of sweeping car, but it is large that shortcoming is water supply volume, high to water quality requirement, the muddy water of collection is difficult to dispose, road pavement there are certain requirements, muddy water case takies larger space, rinses operating efficiency low, and subsidiary engine energy consumption is large and tail gas pollution discharge is many, noise is large, cannot rinse stopway road, roadside, specificity is strong, and acquisition price is higher and cost of use is larger.
Summary of the invention
Road purging method of the present invention and rinse-system, its core content is the road purging method adopting douching wheels and the combination of roadside irrigation canals and ditches, particularly, described rinse-system comprises douching wheels and muddy water collecting precipitation cleaning system.Therefore:
First object of the present invention is to provide a kind of rinse-system, described rinse-system comprises douching wheels and muddy water collecting precipitation cleaning system, so that this douching wheels and described muddy water collecting precipitation cleaning system are combined, make described douching wheels meet or exceed the low and discharge of former douching wheels developing result, energy consumption less, highly versatile, purchase low with cost of use, can rinse stopway road, roadside.
Second object of the present invention is to provide utilizes above-mentioned rinse-system to realize the road purging method that road rinses, and described road purging method operating efficiency is high, can realize flushing water and recycle, and can solve containing dirt water treatment, and can collect in a large number rainwater.
The present invention realizes first object and adopts following technical scheme: a kind of road rinse-system, comprises douching wheels and muddy water collecting precipitation cleaning system.
Optionally, described douching wheels comprises chassis, water tank, lift pump, flushing pump and flooding nozzle;
Described water tank is arranged on automobile chassis, and is provided with water inlet and delivery port on described water tank;
Described lift pump, flushing pump and flooding nozzle are all arranged on described chassis;
The water inlet of described flushing pump is connected with the delivery port of described water tank by the first pipeline, and the delivery port of described flushing pump is connected with described flooding nozzle by the second pipeline;
The delivery port of described lift pump is connected with the water inlet of described water tank by the 3rd pipeline.
Optionally, described flushing pump is mesolow flushing pump.
Optionally, described flooding nozzle comprise two row's short distance nozzles and one long apart from nozzle, described two row's short distance nozzle levels are longitudinally intersected and are installed on described chassis, in order to rinse road left and to the right; A described long centre position that is arranged at rear portion, described chassis apart from nozzle, in order to rinse the road of stopping below roadside-vehicle.
Optionally, described short distance nozzle and length are adjustable apart from the spray angle of nozzle.
Optionally, described muddy water collecting precipitation cleaning system comprises the irrigation canals and ditches that are arranged at road edge, in described irrigation canals and ditches, be provided with collecting well, the degree of depth of described collecting well is deeper than trench depth, and the bottom of described collecting well and irrigation canals and ditches bottom connection place are provided with gear mud weir, on described irrigation canals and ditches, collecting well, be provided with the cover plate of band filtration sieve aperture; When described irrigation canals and ditches run into road rain water well, wall of irrigation canals and ditches and catch-basin share, and wall top arranges overflow weir hole, and the water surface in irrigation canals and ditches enters catch-basin while exceeding overflow weir hole.
The present invention realizes second object and adopts following technical scheme: a kind of road purging method, comprises the steps:
S10, along road, irrigation canals and ditches are set in roadside, and in described irrigation canals and ditches, collecting well are set at a certain distance;
S20, the supernatant water that utilizes the lift pump of douching wheels to extract in collecting well enter in the water tank of douching wheels;
S30, douching wheels rinse road by flooding nozzle under the effect of flushing pump;
The filtration sieve aperture of muddy water after S40, flushing on cover plate enters irrigation canals and ditches and collects, and muddy water recycles after precipitating in irrigation canals and ditches and purifying.
Optionally, described step S30 is specially: under the effect of flushing pump, the dust on road and fine aggregate are poured irrigation canals and ditches by the flooding nozzle of douching wheels, to realize the flushing to road.
Optionally, described step S40 is specially: the muddy water after flushing enters irrigation canals and ditches and collects, and completes precipitation and purifies to enter the muddy water of irrigation canals and ditches described in making in described irrigation canals and ditches; Described irrigation canals and ditches are communicated with collecting well, and the supernatant water after precipitation enters collecting well, and the supernatant water in collecting well is pumped into Recycling in douching wheels water tank by the lift pump of douching wheels.
Optionally, also comprise step S50:
S50, irrigation canals and ditches are also collected rainwater, and the rainwater of collection can be used as rinsing the water circulation use of road, and excessive rainwater enters catch-basin by overflow weir hole, and by gutter white-out.
The present invention has following beneficial effect:
Road purging method of the present invention is used the irrigation canals and ditches in roadside and the collecting well contaminate water that liquidates to purify and collect, then utilize douching wheels to extract water in collecting well in the water tank of douching wheels, then under the effect of flushing pump, by flooding nozzle, road is rinsed; Sewage after flushing flows in irrigation canals and ditches after filtering, will after the sludge settling in sewage, recycle, and not only operating efficiency is high, and has realized recycling of sewage.
Road rinse-system of the present invention, utilize sewage purification system to purify the sewage rinsing after road, concrete purification process is: rinse sewage after road after the band sieves blind patch of irrigation canals and ditches top filters, flow in irrigation canals and ditches and precipitate, upper strata clear water flow in collecting well to be collected.When the work of road douching wheels, extract water from collecting well in water tank, then, under the effect of flushing pump, use flooding nozzle to rinse road, not only operating efficiency is high, and has realized recycling of flushing water.
Brief description of the drawings
Fig. 1 is douching wheels structural representation of the present invention;
Fig. 2 is flooding nozzle structural representation of the present invention;
Fig. 3 is the structural representation of muddy water collecting precipitation cleaning system of the present invention;
Fig. 4 is the structural representation of the muddy water collecting precipitation cleaning system after removal cover plate of the present invention;
In figure, mark is illustrated as: 1-wall; 2-catch-basin; 3-gutter; 4-cliff road; 5-cover plate; 6-road surface; 7-irrigation canals and ditches; 8-overflow weir hole; 9-keeps off mud weir; 10-collecting well; 11-douching wheels; 12-lift pump; 13-water inlet; 14-filler; 15-water tank; 16-flushing pump; 17-delivery port; 18-chassis; 19-sewage draining exit; 22,23-short distance nozzle control valve; 24-is long apart from nozzle control valve; 25,26-short distance nozzle; 27-is long apart from nozzle; 28-filters sieve aperture; 29-barricade; 30-is domatic.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, technical scheme of the present invention is further elaborated.
Embodiment 1
With reference to figure 1-7, the present embodiment provides a kind of road purging method, comprises the steps:
S10, along road, irrigation canals and ditches 7 are set in roadside, and at a certain distance at the interior collecting well 10 that arranges of described irrigation canals and ditches 7;
S20, the supernatant water that utilizes the lift pump 12 of douching wheels 11 to extract in collecting well 10 enter in the water tank 15 of douching wheels 11;
S30, douching wheels 11 rinse road by flooding nozzle under the effect of flushing pump 16;
S40, flushing muddy water enter irrigation canals and ditches 7 by the filtration sieve aperture 28 of cover plate 5, and supernatant water after precipitation recycles, and muddy water recycles after the interior precipitation of irrigation canals and ditches 7 purifies.
Road purging method of the present invention is used roadside irrigation canals and ditches 7 and collecting well 10 to purify and collect rinsing muddy water, then utilize douching wheels 11 to extract water in collecting well 10 in the water tank 15 of douching wheels 11, under the effect of flushing pump 16, by flooding nozzle, road is rinsed; Muddy water after flushing enters irrigation canals and ditches 7 by the filtration sieve aperture 28 of cover plate 5, and supernatant water after precipitation recycles, and not only operating efficiency is high, and has realized recycling of muddy water.
In the present embodiment, optional, described step S30 is specially: under the effect of flushing pump 16, the dust on road and fine aggregate are poured irrigation canals and ditches 7 by the flooding nozzle of douching wheels, to realize the flushing to road.
In the present embodiment, optional, described step S40 is specially: the muddy water after flushing stores in irrigation canals and ditches, and by the sludge settling in muddy water; Irrigation canals and ditches 7 are communicated with collecting well 10, and the water after precipitation purifies enters collecting well 10, and the lift pump 12 of douching wheels 11 pumps into described water tank 15 by the water after precipitation from collecting well 10, so that water is recycled.
In the present embodiment, optional, also comprise step S50:
S50, irrigation canals and ditches 7 are also collected rainwater, and the rainwater of collection can be used as the water circulation use that rinses road, and to realize collection and the use to rainwater, excessive rainwater enters catch-basin 2 by overflow weir hole 8, and by gutter 3 white-outs.
Embodiment 2
With reference to figure 1-4, the present embodiment provides a kind of road rinse-system, it is characterized in that, comprises douching wheels 11 and muddy water collecting precipitation cleaning system.
Road rinse-system of the present invention, utilize muddy water collecting precipitation cleaning system to purify the muddy water rinsing after road, concrete purification process is: the muddy water rinsing after road enters irrigation canals and ditches 7 by the filtration sieve aperture 28 of cover plate 5, and supernatant water after precipitation recycles.When the work of road douching wheels, extract water from collecting well 10 in water tank 15, then, under the effect of flushing pump 16, use flooding nozzle to rinse road, not only operating efficiency is high, and has realized recycling of flushing water.
In the present embodiment, optional, described douching wheels 11 comprises lift pump 12, water tank 15, flushing pump 16, chassis 18 and flooding nozzle 25,26,27;
Described water tank 15 is arranged on chassis 18, and on described water tank 15, is provided with water inlet 13 and delivery port 17;
Described lift pump 12, flushing pump 16 and flooding nozzle 25,26,27 are all arranged on described chassis 18;
The water inlet of described flushing pump 16 is connected with the delivery port 17 of described water tank 15 by the first pipeline, and the delivery port of described flushing pump 16 is connected with described flooding nozzle 25,26,27 by the second pipeline;
The delivery port of described lift pump 12 is connected with the water inlet 13 of described water tank 15 by the 3rd pipeline.
Visible, the douching wheels 11 of the present embodiment has been cancelled the parts such as assisted engine, high pressure collecting blower fan and muddy water case, has reduced douching wheels noise pollution, reduces the nearly diesel consumption and the tail gas pollution discharge that exceedes half of half; And increase corresponding clear water storage area, reduced to come and go adding water the time, saved the draining of muddy water case supernatant water, mud and the operation such as toppled over, therefore improved bicycle road to rinse operating efficiency; And the douching wheels of the present embodiment can be used as without any changes road sprinkler and uses, be applicable to the shower nozzle of construction watering, greening watering as installed, can become MPV (Multi-Purpose Vehicle), save investment and improve vehicle utilization.
In the present embodiment, the top of described water tank 15 also offers filler 14, with by described filler 14 to described water tank 15 clear water of annotating; Further, the bottom of described water tank 15 also offers sewage draining exit 19, and described sewage draining exit 19 is for discharging the mud precipitating in described water tank from described sewage draining exit.
In the present embodiment, optional, described flushing pump 16 is mesolow scavenging pump, and described mesolow scavenging pump can use the flushing pump of hydraulic pressure lower than 2.5 MPas, to reduce acquisition cost, reduce energy consumption and reduce and damage, reduces use cost; And described flushing pump 16 can be by the motor driven of douching wheels 11, and coordinate with plain nozzle, reduce atomization energy consumption, reduce the requirement to water quality, therefore can use tap water, river lake water, rainwater and Zhong Shui, flushing water and the rainwater that also can directly use irrigation canals and ditches collecting well to collect nearby, thus a large amount of wash waters saved.
In the present embodiment, optionally, described flooding nozzle comprises two row's short distance nozzles 25, 26 and one long apart from nozzle 27, described two row's short distance nozzles 25, 26 levels are longitudinally intersected and are installed on described chassis, be described two row's short distance nozzles 25, 26 include steel pipe and multiple nozzle being communicated with on described steel pipe and with described steel pipe that is installed on, and described two row's short distance nozzles 25, 26 steel pipe is all articulated with on described chassis 18, described two row's short distance nozzles 25, the nozzle opening direction of the row's short distance nozzle of one in 26 25 to the right, the nozzle opening direction of another row's short distance nozzle left, in order to rinse road left and to the right, a described long centre position that is arranged at rear portion, described chassis apart from nozzle 27, the nozzle that described length comprises steel pipe and is communicated with described steel pipe apart from nozzle 27, described length is also articulated with on described chassis 18 apart from the steel pipe of nozzle 27, in order to rinse the road of stopping below the vehicle in roadside, and by the rotation of described flooding nozzle, realize the adjusting apart from the spray angle of nozzle 27 and short distance nozzle 25,26 to described length, in reality, use as required which nozzle 25,26 or 27, by 22,23 or 24 control valve controls.
In the present embodiment, optional, described lift pump 12 is by the motor driven of travelling of vehicle, and the water sucking from irrigation canals and ditches collecting well 10 first can stop through one the strainer that is greater than 0.5mm diameter material; And described short distance nozzle 25,26 and long selecting apart from nozzle 27 can be by being less than the nozzle of 0.5mm material.
In the present embodiment, optional, described muddy water collecting precipitation cleaning system comprises the irrigation canals and ditches 7 that are arranged at 6 edges, road surface, and described irrigation canals and ditches 7 are between described cliff road 4 and described road surface 6; In described irrigation canals and ditches 7, be provided with collecting well 10, the degree of depth of described collecting well 10 is deeper than irrigation canals and ditches 7 degree of depth, and described collecting well 10 is provided with gear mud weir 9 with irrigation canals and ditches 7 bottom connection places, on described irrigation canals and ditches 7 and collecting well 10, be provided with the cover plate 5 that band filters sieve aperture 28, to realize filtration and the precipitation process to muddy water by irrigation canals and ditches 7 and collecting well 10.
In the present embodiment, optional, the inner width 300mm to 380mm of described irrigation canals and ditches 7, dark 1100mm to 1200mm; The dark 1500mm to 1600mm of collecting well 10, the inner width of collecting well 10 is identical with irrigation canals and ditches, and the distance between adjacent collecting well 10 is 500m to 1000m; Described cover plate 5 thickness are 70mm to 90mm, are provided with bar shaped or the circular filter bores of perforation on described cover plate 5, the wide 10mm to 15mm of bar shaped filter bores, long 50mm to 100mm, circular filter bores diameter 15mm to 25mm, percent opening 30% to 50%; The canal wall thickness of described irrigation canals and ditches 7 is 100mm to 120mm, and cover plate is placed in hugging above irrigation canals and ditches and with road surface and maintains an equal level, and groove is along the wide 50mm to 60mm of barricade 29, the long 1000mm to 1200mm of cover plate 5.
In the present embodiment, optionally, on described road, be provided with catch-basin 2, and in the time that described irrigation canals and ditches 7 run into catch-basin 2, wall of irrigation canals and ditches 7 and catch-basin 2 share, and wall 1 top arranges overflow weir hole 8, and the water surface in irrigation canals and ditches 7 enters catch-basin 2 while exceeding overflow weir hole 8, and from described gutter 3 white-outs, to prevent that the water in described irrigation canals and ditches 7 from overflowing described irrigation canals and ditches 7; The square hole that described overflow weir hole 8 is 100mm, the center to center distance of described square hole is 200mm.
Optionally, the cover plate 5 that described band filters sieve aperture 28 has one 45 degree domatic 30 in cliff road 6 sides, to prevent that cliff road 6 and cover plate 5 angles from retaining silt particle.
On the wall of described irrigation canals and ditches 7, be provided with barricade 29, the cover plate 5 that described band filters sieve aperture 28 is arranged between described barricade 29 and described cliff road 6.
The present invention adopts a kind of water circulation use and can collect the road purging method that uses rainwater, the method is to organically combine having cancelled assisted engine, high pressure positive blower, muddy water case and road douching wheels and road gutter canal with the alternative high-pressure pump of mesolow pump, rationally bring into play function and efficacy separately, beneficial effect comprises:
1, using water wisely
Recycle by flushing water, can economize on water 50%.In addition, rainwater can be collected, stores and be utilized to sewerage in a large number, 250 tons of every kilometer of irrigation canals and ditches capable of storing water, and 3 tons of the each wash waters of per kilometer of road, do not consider loss, rinse in theory 1 every day and can enough use 80 days, 5 days 1 time is available 1 year.
2, improve operating efficiency
Increase clear water capacity by the muddy water case of cancelling former douching wheels, nearby from collecting well water intaking, do not need to stop drain the too much supernatant water of muddy water case, do not need to topple over muddy water case thickness muddy water and scrub vehicle etc., can make the operating efficiency that rinses road improve 1 times.
3, energy-saving and emission-reduction
By cancelling former douching wheels subsidiary engine, high pressure positive blower and high-pressure hydraulic pump, energy consumption reduces by 50% left and right, also corresponding minimizing of tail gas pollution discharge, and noise pollution will obviously reduce.
4, condition compliance is good
Because not needing, with larger vacuum power suction road surface muddy water, can to adapt to poor road surface; Selected flushing pump and nozzle can allow to exist compared with the suspension of small particle diameter in flushing water, therefore can adapt to multiple water source and supply water.
5, solve muddy water disposal difficulties
It is that mud-water separation and silt particle are disposed that flushing water recycles maximum difficulty, adopts muddy water collecting precipitation cleaning system better to solve problem, and the silt particle precipitating in irrigation canals and ditches can be removed 1 time according to different regions and road for 6 to 24 months.
6, increase function
Can rinse stopway road, roadside, can be used as the MPV (Multi-Purpose Vehicle) such as road douching wheels, road sprinkler, building site reducing dust lowering car, greening watering car and waterr transporting vehicle, improve vehicle utilization rate.Rain while particularly raining heavily, irrigation canals and ditches are with minimum distance white-out surface gathered water, and the discharge area of cover plate is much larger than rainwater grid discharge area, can not result in blockage.
7, good good economy performance
Douching wheels is purchased with cost of use and can significantly be lowered, and operating efficiency improves can reduce cost of labor, and using water wisely benefit and saving silt particle are disposed place and expense etc.
The sequencing of above embodiment only, for ease of describing, does not represent the quality of embodiment.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a road purging method, is characterized in that, comprises the steps:
S10, along road, irrigation canals and ditches are set in roadside, and in described irrigation canals and ditches, collecting well are set at a certain distance;
S20, the supernatant water that utilizes the lift pump of douching wheels to extract in collecting well enter in the water tank of douching wheels;
S30, douching wheels rinse road by flooding nozzle under the effect of flushing pump;
The filtration sieve aperture of muddy water after S40, flushing on cover plate enters irrigation canals and ditches and collects, and muddy water recycles after precipitating in irrigation canals and ditches and purifying.
2. road purging method according to claim 1, is characterized in that, described step S30 is specially: under the effect of flushing pump, the dust on road and fine aggregate are poured irrigation canals and ditches by the flooding nozzle of douching wheels, to realize the flushing to road.
3. road purging method according to claim 1, is characterized in that, described step S40 is specially: the muddy water after flushing enters irrigation canals and ditches and collects, and completes precipitation and purifies to enter the muddy water of irrigation canals and ditches described in making in described irrigation canals and ditches; Described irrigation canals and ditches are communicated with collecting well, and the supernatant water after precipitation enters collecting well, and the supernatant water in collecting well is pumped into Recycling in douching wheels water tank by the lift pump of douching wheels.
4. road purging method according to claim 3, is characterized in that, also comprises step S50:
S50, irrigation canals and ditches are also collected rainwater, and the rainwater of collection can be used as rinsing the water circulation use of road, and excessive rainwater enters catch-basin by overflow weir hole, and by gutter white-out.
5. a road rinse-system, is characterized in that, comprises douching wheels and muddy water collecting precipitation cleaning system.
6. a douching wheels as claimed in claim 5, is characterized in that, comprises chassis, water tank, lift pump, flushing pump and flooding nozzle;
Described water tank is arranged on automobile chassis, and is provided with water inlet and delivery port on described water tank;
Described lift pump, flushing pump and flooding nozzle are all arranged on described chassis;
The water inlet of described flushing pump is connected with the delivery port of described water tank by the first pipeline, and the delivery port of described flushing pump is connected with described flooding nozzle by the second pipeline;
The delivery port of described lift pump is connected with the water inlet of described water tank by the 3rd pipeline.
7. douching wheels according to claim 6, is characterized in that, described flushing pump is mesolow flushing pump.
8. douching wheels according to claim 6, is characterized in that, described flooding nozzle comprise two row's short distance nozzles and one long apart from nozzle, described two row's short distance nozzle levels are longitudinally intersected and are installed on described chassis, in order to rinse road left and to the right; A described long centre position that is arranged at rear portion, described chassis apart from nozzle, in order to rinse the road of stopping below roadside-vehicle.
9. douching wheels according to claim 6, is characterized in that, described short distance nozzle and length are adjustable apart from the spray angle of nozzle.
10. muddy water collecting precipitation cleaning system according to claim 5, it is characterized in that, comprise the irrigation canals and ditches that are arranged at road edge, in described irrigation canals and ditches, be provided with collecting well, the degree of depth of described collecting well is deeper than trench depth, and the bottom of described collecting well and irrigation canals and ditches bottom connection place are provided with gear mud weir, on described irrigation canals and ditches, collecting well, be provided with the cover plate of band filtration sieve aperture; When described irrigation canals and ditches run into catch-basin, wall of irrigation canals and ditches and catch-basin share, and wall top arranges overflow weir hole, and the water surface in irrigation canals and ditches enters catch-basin while exceeding overflow weir hole.
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| CN105182947A (en) * | 2015-10-09 | 2015-12-23 | 江苏永通市政园林建设有限公司 | Road construction engineering airborne dust control system |
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| CN110685203A (en) * | 2019-09-19 | 2020-01-14 | 杭州南岳建设工程有限公司 | Method for ensuring compactness of periphery of gully of inspection well |
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