CN104032696B - A kind of road purging method and rinse-system - Google Patents
A kind of road purging method and rinse-system Download PDFInfo
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- CN104032696B CN104032696B CN201410229779.4A CN201410229779A CN104032696B CN 104032696 B CN104032696 B CN 104032696B CN 201410229779 A CN201410229779 A CN 201410229779A CN 104032696 B CN104032696 B CN 104032696B
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Abstract
The invention discloses a kind of road purging method and rinse-system, described road purging method comprises the steps: S10, arranges irrigation canals and ditches and sump along road；S20, the supernatant water entrance utilizing the lift pump rinsing car to extract in sump are rinsed in car water tank；Road is rinsed by S30, flushing car by flooding nozzle；Muddy water after S40, flushing enters irrigation canals and ditches and purifies Posterior circle use through precipitation.Described road purging method is flushing car and muddy water to be collected precipitation cleaning system organically combine, although adds muddy water and collects precipitation cleaning system, but bring the biggest benefit: makes flushing bassinet structure simplify, and realization and sprinkling truck, waterr transporting vehicle are general；Reduce vehicle to purchase and operating cost；Reduce and rinse car 50% energy resource consumption, and reduce the discharge of corresponding tail gas pollution；Reduce sound pollution；Rinse car working performance and improve more than 1 times；Utilize irrigation canals and ditches to collect and rinse muddy water, after Recycling, can economize on water more than 50%.
Description
Technical field
The present invention relates to road-cleaning keep a public place clean, particularly relate 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 to reduce traffic route airborne dust, improve atmospheric environment matter
The important process of amount.At present, urban road cleans and has been enter into mechanical times, and various big-and-middle-sized sweeper quantity get more and more,
Typically have hundreds of to thousands of according to city size, megalopolis future will be more than ten thousand.
More common sweeper uses swipe mode, and cleaning process is first to be concentrated by the dust on road surface, then by drawing
Blower fan is drawn in the refuse bin of sweeper, and this cleaning mode cleaning effect is poor, and can bring substantial amounts of airborne dust and row
Dirt.In order to improve road surface clear dirt effect, reduce traffic route dust pollution, and prevent cleaning work dust pollution, increasingly
Many cities begin to use flushing car.At present, more advanced flushing car uses high-pressure pump to be used by nozzle rinse road surface, nozzle
V-arrangement is arranged and muddy water focuses on when vehicle forward V-arrangement angle, utilizes high pressure positive blower powerful suction to be sucked by muddy water
Rinse car muddy water case to store, muddy water is delivered to special disposal site afterwards.Rinse car and control dust on the roads and the effect of dust discharge
That several times to tens times of car swept by brush, but shortcoming to be water consumption big, high to water quality requirement, the muddy water of collection is difficult to dispose, and satisfies the need
Face there are certain requirements, and muddy water case takies larger space, rinses working performance low, and subsidiary engine energy consumption is big and tail gas pollution discharge is many, makes an uproar
Sound is big, it is impossible to be rinsed stopway road, roadside, and specificity is strong, and acquisition price is higher and cost of use is bigger.
Utility model content
The road purging method of the present invention and rinse-system, its core content is to use organic with roadside irrigation canals and ditches for flushing car
In conjunction with road purging method, specifically, described rinse-system includes that rinsing car and muddy water collects precipitation cleaning system.Cause
This:
First purpose of the present invention is to provide a kind of rinse-system, and described rinse-system includes rinsing car and muddy water is collected
Precipitation cleaning system, combines so that this flushing car and described muddy water to be collected precipitation cleaning system, make described flushing car reach or
Exceed that former flushing car developing result, energy consumption be low and discharge less, highly versatile, purchase low with cost of use, can be to roadside stopway
Road is rinsed.
Second object of the present invention is to provide and utilizes above-mentioned rinse-system to realize the road purging method that road rinses, institute
State road purging method working performance high, it is possible to realize flushing water and recycle, it is possible to resolve containing mud sewage disposal, and can be a large amount of
Collect rainwater.
The present invention realizes first purpose and adopts the following technical scheme that a kind of road rinse-system, including rinsing car and mud
Water collects precipitation cleaning system.
Optionally, described flushing car includes 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 outlet on described water tank；
Described lift pump, flushing pump and flooding nozzle may be contained within described chassis；
The water inlet of described flushing pump is connected with the outlet of described water tank by the first pipeline, the water outlet of described flushing pump
Mouth is connected with described flooding nozzle by the second pipeline；
The outlet 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 include two row's short distance nozzles and
One long away from nozzle, and described two row's short distance nozzle level are crossed longitudinally to be installed on described chassis, in order to rinse to the left and to the right
Road；One length is arranged at the centre position at rear portion, described chassis away from nozzle, in order to rinse below stop roadside-vehicle
Road.
Optionally, described short distance nozzle and the long spray angle away from nozzle are adjustable.
Optionally, described muddy water collects the irrigation canals and ditches that precipitation cleaning system includes being arranged at road edge, sets in described irrigation canals and ditches
Being equipped with sump, the degree of depth of described sump is deeper than trench depth, and the bottom of described irrigation canals and ditches is provided with in sump both sides
Gear mud weir, described irrigation canals and ditches, sump is provided with band and filters the cover plate of sieve aperture；When described irrigation canals and ditches run into road rain water well, irrigation canals and ditches
A wall and catch-basin share, wall top arranges downflow weir hole, and the water surface in irrigation canals and ditches enters rain when exceeding downflow weir hole
Well.
The present invention realizes second purpose and adopts the following technical scheme that a kind of road purging method, comprises the steps:
S10, in roadside, irrigation canals and ditches are set along road, and at a certain distance sump are set in described irrigation canals and ditches；
S20, utilization are rinsed in the water tank of the supernatant water entrance flushing car in the lift pump extraction sump of car；
Road is rinsed under the effect of flushing pump by S30, flushing car by flooding nozzle；
The muddy water after S40, flushing filtration sieve aperture on cover plate enters irrigation canals and ditches and collects, after muddy water precipitates purification in irrigation canals and ditches
Recycle.
Optionally, described step S30 is particularly as follows: under the effect of flushing pump, rinse the flooding nozzle of car by road
Dust and grail pour irrigation canals and ditches, to realize the flushing to road.
Optionally, described step S40 is particularly as follows: the muddy water after Chong Xiing enters irrigation canals and ditches collection, so that described entrance irrigation canals and ditches
Muddy water complete in described irrigation canals and ditches precipitation and purify；Described irrigation canals and ditches connect with sump, and the supernatant water after precipitation enters and catchments
Well, the supernatant water in sump is pumped into Recycling in flushing car water tank by the lift pump rinsing car.
Optionally, step S50 is also included:
Rainwater also collected by S50, irrigation canals and ditches, and the rainwater of collection can be used as rinsing the water circulation use of road, and excess rainwater passes through
Downflow weir hole enters catch-basin, and by drain pipe white-out.
There is advantages that
The road purging method of the present invention uses the irrigation canals and ditches in roadside and sump to purify and collect rinsing sewage, so
Rear utilize rinse car extraction sump in water to flushing car water tank in, then under the effect of flushing pump, sprayed by flushing
Road is rinsed by mouth；Sewage after flushing flows in irrigation canals and ditches after filtering, is used by the sludge settling Posterior circle in sewage,
Not only work efficiency is high, and achieves recycling of sewage.
The road rinse-system of the present invention, utilizes sewage purification system to purify the sewage after rinsing road, specifically
Purification process is: rinse the sewage after road after the band sieves blind patch above irrigation canals and ditches filters, be flowed in irrigation canals and ditches and carry out
Precipitation, upper strata clear water is flowed in sump collection.Road rinses turner when making, and extracts water in water tank, so from sump
After under the effect of flushing pump, use flooding nozzle that road is rinsed, not only working performance is high, and achieves flushing water
Recycle.
Accompanying drawing explanation
Fig. 1 is the flushing bassinet structure schematic diagram of the present invention；
Fig. 2 is the flooding nozzle structural representation of the present invention；
Fig. 3 is that the muddy water of the present invention collects the structural representation precipitating cleaning system；
Fig. 4 is the structural representation that the muddy water after the removal cover plate of the present invention collects precipitation cleaning system；
In figure, labelling is illustrated as: 1-wall；2-catch-basin；3-drain pipe；4-cliff road；5-cover plate；6-road surface；7-irrigation canals and ditches；
8-downflow weir hole；9-keeps off mud weir；10-sump；11-rinses car；12-lift pump；13-water inlet；14-filler；15-water
Case；16-flushing pump；17-outlet；18-chassis；19-sewage draining exit；22,23-short distance nozzle control valves；24-length is away from nozzle control
Valve processed；25,26-short distance nozzles；27-length is away 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 is further elaborated.
Embodiment 1
With reference to Fig. 1-4, present embodiments provide a kind of road purging method, comprise the steps:
S10, in roadside, irrigation canals and ditches 7 are set along road, and at a certain distance sump 10 are set in described irrigation canals and ditches 7；
S20, the supernatant water utilizing the lift pump 12 rinsing car 11 to extract in sump 10 enter the water tank 15 rinsing car 11
In；
Road is rinsed under the effect of flushing pump 16 by S30, flushing car 11 by flooding nozzle；
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,
I.e. muddy water precipitates purification Posterior circle use in irrigation canals and ditches 7.
The road purging method of the present invention uses roadside irrigation canals and ditches 7 and sump 10 to purify rinsing muddy water and collect,
Then utilize and rinse car 11 and extract water in sump 10 in the water tank 15 rinsing car 11, under the effect of flushing pump 16, lead to
Cross flooding nozzle road is rinsed；Muddy water after flushing enters irrigation canals and ditches 7, after precipitation by the filtration sieve aperture 28 of cover plate 5
Supernatant water recycle, not only work efficiency is high, and achieves recycling of muddy water.
In the present embodiment, optionally, described step S30 is particularly as follows: under the effect of flushing pump 16, rinse the flushing spray of car
Dust on road and grail are poured irrigation canals and ditches 7 by mouth, to realize the flushing to road.
In the present embodiment, optionally, described step S40 is particularly as follows: the muddy water after Chong Xiing stores in irrigation canals and ditches, and by muddy water
In sludge settling；Irrigation canals and ditches 7 connect with sump 10, and the water after precipitation purifies enters sump 10, rinses the lift pump of car 11
Water after precipitation is pumped into described water tank 15 from sump 10, so that water is circulated utilization by 12.
In the present embodiment, optionally, also including that rainwater also collected by step S50:S50, irrigation canals and ditches 7, the rainwater of collection can be made
For rinsing the water circulation use of road, to realize the collection to rainwater and use, excess rainwater enters rainwater by downflow weir hole 8
Well 2, and by drain pipe 3 white-out.
Embodiment 2
With reference to Fig. 1-4, present embodiments provide a kind of road rinse-system, it is characterised in that include rinsing car 11 and mud
Water collects precipitation cleaning system.
The road rinse-system of the present invention, utilizes muddy water to collect precipitation cleaning system and carries out the muddy water after rinsing road only
Changing, concrete purification process is: rinses the muddy water after road and enters irrigation canals and ditches 7 by the filtration sieve aperture 28 of cover plate 5, after precipitation upper
Clear water recycles.Road rinses turner when making, and extracts water in water tank 15, then at the work of flushing pump 16 from sump 10
Under with, using flooding nozzle to be rinsed road, not only working performance is high, and achieves recycling of flushing water.
In the present embodiment, optionally, described flushing car 11 includes lift pump 12, water tank 15, flushing pump 16, chassis 18 and punching
Wash nozzle 25,26,27；Described water tank 15 is arranged on chassis 18, and is provided with water inlet 13 and water outlet on described water tank 15
Mouth 17；
Described lift pump 12, flushing pump 16 and flooding nozzle 25,26,27 may be contained within described chassis 18；Described flushing
The water inlet of pump 16 is connected with the outlet 17 of described water tank 15 by the first pipeline, and the outlet of described flushing pump 16 passes through the
Two pipelines are connected with described flooding nozzle 25,26,27；
The outlet of described lift pump 12 is connected with the water inlet 13 of described water tank 15 by the 3rd pipeline.
Visible, the flushing car 11 of the present embodiment eliminates the parts such as assisted engine, high pressure collecting blower fan and muddy water case, fall
Low flushing car sound pollution, the diesel consumption reducing nearly half and the tail gas pollution discharge exceeding half；And add phase
The clear water storage area answered, decreases round adding water the time, and eliminate muddy water case supernatant water draining, mud is toppled over etc. operates, because of
This improves bicycle road and rinses work efficiency；And the flushing car of the present embodiment can be used as road sprinkler without any changes
Use, be applicable to construction watering, the shower nozzle of greening watering as installed, then can become MPV (Multi-Purpose Vehicle), investment reduction and raising
Vehicle utilization.In the present embodiment, the top of described water tank 15 is further opened with filler 14, with by described filler 14 to institute
State water tank 15 and fill clear water；Further, the bottom of described water tank 15 is further opened with sewage draining exit 19, and described sewage draining exit 19 is used for will
In described water tank, the mud of precipitation is discharged from described sewage draining exit.
In the present embodiment, optionally, described flushing pump 16 cleans pump for mesolow, and the most described mesolow cleans pump and can use
The hydraulic pressure flushing pump less than 2.5 MPas, to reduce acquisition cost, reduce energy consumption and reduce damage, reduces use cost；And institute
State flushing pump 16 to be driven by the electromotor rinsing car 11, and coordinate with plain nozzle, decrease atomization energy consumption, reduce water quality
Requirement, therefore can use tap water, river lake water, rainwater and Zhong Shui, it is also possible to directly use irrigation canals and ditches sump to collect the most nearby
Flushing water and rainwater, thus save a large amount of wash water.
In the present embodiment, optionally, described flooding nozzle includes that 25,26 and one, two row's short distance nozzle is long away from nozzle 27,
Described two row's short distance nozzle 25,26 levels are crossed longitudinally to be installed on described chassis, and the most described two row's short distance nozzles 25,26 all wrap
Include steel pipe and multiple nozzles being installed on described steel pipe and connect with described steel pipe, 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 side of the row's short distance nozzle 25 in 26
To the right, another arranges the nozzle opening direction of short distance nozzle to the left, in order to rinse road to the left and to the right；One length is away from spray
Mouth 27 is arranged at the centre position at rear portion, described chassis, and described length includes steel pipe and the spray connected with described steel pipe away from nozzle 27
Mouth, the described length steel pipe away from nozzle 27 is also articulated with on described chassis 18, in order to rinse the road below the vehicle stopping roadside,
And by the rotation of described flooding nozzle, it is achieved to described length away from nozzle 27 and the regulation of the spray angle of short distance nozzle 25,26；
In reality, use which nozzle 25,26 or 27 as required, controlled by 22,23 or 24 control valves.
In the present embodiment, optionally, described lift pump 12 is driven by the traveling electromotor of vehicle, inhales from irrigation canals and ditches sump 10
The water entered first passes through one can stop the filter more than 0.5mm diameter materials；And described short distance nozzle 25,26 and long away from nozzle
27 selections can be by the nozzle less than 0.5mm material.
In the present embodiment, optionally, described muddy water collects the irrigation canals and ditches 7 that precipitation cleaning system includes being arranged at edge, road surface 6,
Described irrigation canals and ditches 7 are between described cliff road 4 and described road surface 6；Described irrigation canals and ditches 7 are provided with sump 10, described sump 10
The degree of depth be deeper than irrigation canals and ditches 7 degree of depth, and the bottom of described irrigation canals and ditches 7 is provided with gear mud weir 9, described irrigation canals and ditches 7 in sump 10 both sides
Be provided with on sump 10 band filter sieve aperture 28 cover plate 5, to realize the filtration to muddy water by irrigation canals and ditches 7 and sump 10
And precipitation process.
In the present embodiment, optionally, the inner width 300mm to 380mm of described irrigation canals and ditches 7, deep 1100mm to 1200mm；Sump
10 deep 1500mm to 1600mm, the inner width of sump 10 is identical with irrigation canals and ditches, the adjacent distance between sump 10 be 500m extremely
1000m；Described cover plate 5 thickness is 70mm to 90mm, is provided with through bar shaped or circular filter hole, bar on described cover plate 5
Shape filtering holes width 10mm to 15mm, long 50mm to 100mm, circular filter bore dia 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 on the hugging above irrigation canals and ditches Nei and maintains an equal level with road surface, and groove is along gear
Wall 29 wide 50mm to 60mm, the long 1000mm to 1200mm of cover plate 5.In the present embodiment, optionally, described road is provided with rainwater
Well 2, and when described irrigation canals and ditches 7 run into catch-basin 2, a wall of irrigation canals and ditches 7 shares with catch-basin 2, and wall 1 top arranges overflow
Hole, weir 8, the water surface in irrigation canals and ditches 7 enters catch-basin 2 when exceeding downflow weir hole 8, and from described drain pipe 3 white-out, described to prevent
Water in irrigation canals and ditches 7 overflows described irrigation canals and ditches 7；Described downflow weir hole 8 is the square hole of 100mm, the centre-to-centre spacing of described square hole
For 200mm.
Optionally, described band filters the cover plate 5 of sieve aperture 28 has one 45 degree domatic 30 in cliff road 6 side, with prevent cliff road 6 and
Cover plate 5 angle retains silt particle.Being provided with barricade 29 on the wall of described irrigation canals and ditches 7, described band filters the cover plate 5 of sieve aperture 28 and arranges
Between described barricade 29 and described cliff road 6.The present invention uses a kind of water circulation use and can collect the road punching using rainwater
Washing method, the method is will to eliminate assisted engine, high pressure positive blower, muddy water case and substitute the road of high-pressure pump with mesolow pump
Rinsing Che Yu road gutter canal to organically combine, rationally play respective function and effect, beneficial effect includes:
1, using water wisely
Recycled by flushing water, can economize on water 50%.Additionally, sewerage can be collected in a large number, stores and utilize rainwater,
Every kilometer of irrigation canals and ditches storing water 250 tons, each wash water of per kilometer of road 3 tons, do not consider loss, rinse every day in theory 1 time
Can enough use 80 days, can use 1 year for 5 days 1 time.
2, working performance is improved
Increase clear water capacity by cancelling the muddy water case of former flushing car, fetch water from sump nearby, be not required to parking and drain mud
The too much supernatant water of water tank, it is not required to topple over muddy water case thickness muddy water and scrub vehicle etc., the working performance of flushing road can be made to improve 1
Times.
3, energy-saving and emission-reduction
By cancelling former flushing car subsidiary engine, high pressure positive blower and high-pressure hydraulic pump, energy consumption reduces about 50%, and tail gas pollution discharges
Reducing the most accordingly, sound pollution will substantially reduce.
4, condition adaptability is good
Because need not with relatively large vacuum power suction road surface muddy water, it is suitable for poor road surface；Selected flushing pump and nozzle can be permitted
Permitted flushing water exists the float of relatively small particle, be therefore suitable for multiple water source and supply water.
5, muddy water disposal difficulties is solved
It is mud-water separation and silt particle disposal that flushing water recycles the difficulty of maximum, uses muddy water to collect precipitation cleaning system
The most preferably solving problem, in irrigation canals and ditches, the silt particle of precipitation can remove 1 time in 6 to 24 months according to different regions and road.
6, function is increased
Stopway road, roadside can be rinsed, car, road sprinkler, building site reducing dust lowering car, greening can be rinsed as road
The MPV (Multi-Purpose Vehicle) such as sprinkler and waterr transporting vehicle, improves vehicle utilization rate.Raining when 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, does not results in blocking.
7, good good economy performance
Flushing car is purchased and can significantly be lowered with cost of use, and working performance improves can reduce cost of labor, and using water wisely is imitated
Benefit and saving silt particle dispose place and expense etc..
The sequencing of above example only for ease of describing, does not represent the quality of embodiment.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although
With reference to previous embodiment, the present invention is described in detail, it will be understood by those within the art that: it still may be used
So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent；
And these amendment or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (8)
1. a road purging method, it is characterised in that comprise the steps:
S10, in roadside, irrigation canals and ditches are set along road, and at a certain distance sump are set in described irrigation canals and ditches；
S20, utilization are rinsed in the water tank of the supernatant water entrance flushing car in the lift pump extraction sump of car；
Road is rinsed under the effect of flushing pump by S30, flushing car by flooding nozzle；
The muddy water after S40, flushing filtration sieve aperture on cover plate enters irrigation canals and ditches and collects, and muddy water precipitates purification Posterior circle in irrigation canals and ditches
Use；
Also include step S50:
Rainwater also collected by S50, irrigation canals and ditches, and the rainwater of collection can be used as rinsing the water circulation use of road, and excess rainwater passes through overflow
Hole, weir enters catch-basin, and by drain pipe white-out.
Road purging method the most according to claim 1, it is characterised in that described step S30 is particularly as follows: at flushing pump
Under effect, the dust on road and grail are poured irrigation canals and ditches by the flooding nozzle rinsing car, to realize the flushing to road.
Road purging method the most according to claim 1, it is characterised in that described step S40 is particularly as follows: mud after Chong Xiing
Water enters irrigation canals and ditches and collects, so that the muddy water entering irrigation canals and ditches completes precipitation in described irrigation canals and ditches and purifies；Described irrigation canals and ditches with catchment
Well connects, and the supernatant water after precipitation enters sump, and the supernatant water in sump is pumped into and rushes car wash water by the lift pump of flushing car
Recycling in case.
4. a road rinse-system, it is characterised in that including rinsing car and muddy water collects precipitation cleaning system, muddy water is collected heavy
Shallow lake cleaning system includes the irrigation canals and ditches being arranged at road edge, is provided with sump in described irrigation canals and ditches, and the degree of depth of described sump is deep
In trench depth, and described trench bottom is provided with gear mud weir in sump both sides, and described irrigation canals and ditches, sump are provided with band
Filter the cover plate of sieve aperture；When described irrigation canals and ditches run into catch-basin, a wall of irrigation canals and ditches shares with catch-basin, and wall top arranges excessive
Liu Yan hole, the water surface in irrigation canals and ditches enters catch-basin when exceeding downflow weir hole.
5. flushing car used in a road rinse-system as claimed in claim 4, it is characterised in that include chassis, water
Case, lift pump, flushing pump and flooding nozzle；Described water tank is arranged on automobile chassis, and is provided with into water on described water tank
Mouth and outlet；Described lift pump, flushing pump and flooding nozzle may be contained within described chassis；The water inlet of described flushing pump
Being connected by the outlet of the first pipeline with described water tank, the outlet of described flushing pump rinses spray by the second pipeline with described
Mouth connects；The outlet of described lift pump is connected with the water inlet of described water tank by the 3rd pipeline.
Flushing car the most according to claim 5, it is characterised in that described flushing pump is mesolow flushing pump.
Flushing car the most according to claim 5, it is characterised in that described flooding nozzle includes two row's short distance nozzles and one
Long away from nozzle, described two row's short distance nozzle level are crossed longitudinally to be installed on described chassis, in order to rinse road to the left and to the right；
One length is arranged at the centre position at rear portion, described chassis away from nozzle, in order to rinse the road stopped below roadside-vehicle.
Flushing car the most according to claim 7, it is characterised in that described short distance nozzle and the long spray angle away from nozzle are
Adjustable.
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| CN105182947B (en) * | 2015-10-09 | 2018-04-13 | 江苏永通市政园林建设有限公司 | A kind of constructing road engineering dust controlling system |
| CN107142811B (en) * | 2017-05-22 | 2020-02-14 | 深圳市华胜建设工程有限公司 | Road drainage water filtering structure |
| CN109287241B (en) * | 2018-11-15 | 2021-02-26 | 徐州德高电动车科技有限公司 | Can spray truck of nutrient solution alone |
| CN110685203B (en) * | 2019-09-19 | 2021-04-20 | 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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| CN104032696A (en) | 2014-09-10 |
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