1161results about How to "Improve drainage efficiency" patented technology

A coal gasification process of coal bed deep underneath includes a gasification furnace in the coal bed, a gas let in canal linking one end of the furnace to ground, a gas let out canal linking the other end of the furnace to ground. Gas generated by coal burning in the furnace is collected. A drain system links a drain outlet over 10 meters below the furnace to the ground.

The invention discloses an underground ultrasonic yield-increasing and atomized pumping device for coalseam gas. A reciprocating vacuum pump and an underground ultrasonic wave generator are connected by a control cabinet. The underground ultrasonic wave generator is connected to the ultrasonic yield-increasing and atomized pumping device. The reciprocating vacuum pump is connected to oil pipes. A casing pipe provided with an oil pipe is deeply inserted into a coalseam. An oil pipe opening is higher than a casting pipe opening. The ultrasonic yield-increasing and atomized pumping device is installed at the lower end in the oil pipe and used for sealing the oil pipe lower opening. The device includes: a high-power ultrasonic atomization transducer and a yield-increasing device ultrasonic transducer. The lower end of the high-power ultrasonic atomization transducer is connected to the yield-increasing device ultrasonic transducer, and is extended the lower end of the oil pipe opening. An inlet duct communicated with the casting pipe inner chamber is arranged in the oil pipe. A filter screen, a solenoid valve and a liquid level sensor are arranged in the inlet duct. The lower wall of the casting pipe is provided with eyeholes. A coalseam opening is arranged out of the casting pipe above the ground. According to the underground ultrasonic yield-increasing and atomized pumping device disclosed by the invention, the pumping operation for the coalseam gas can be completed, no mechanical motion occurs, and the advantages of saving energy, increasing the total desorption amount of the coalseam gas, reducing the cost and being simple in maintenance are achieved.

The invention provides a horizontal and vertical combined underdrainage device for improving interlayer soil of coastal mud flat reclamation area farmland. According to the device, coastal mud flat saline-alkaline land is provided with salt leaching channels, drainage bodies, concealed water flow collection and water suction conduits and open drainage ditches. The concealed water flow collection and water suction conduits are buried under the coastal mud flat saline-alkaline land according to the line spacing of 17-25 meters. The salt leaching channels are respectively provided with a vertical shaft every 4-6 meters in the length direction of the concealed water flow collection and water suction conduits, and the drainage bodies are arranged in the vertical shafts. The water inlet ends of the concealed water flow collection and water suction conduits are higher than the water outlet ends of the concealed water flow collection and water suction conduits, and the water outlet ends are connected with the open drainage ditches. The invention further provides a combined drainage method. According to the method, salt in the soil of the coastal mud flat saline-alkaline land is leached and flows into the vertical shaft type salt leaching channels along with water flow, and the concealed water flow collection and water suction conduits collect the water flow in the salt leaching channels and guide the water flow into the open drainage ditches. The device has the advantages of being reasonable in structure, convenient to construct and install, low in cost, short in improvement period, fast in effect, capable of being widely applied and popularized in the areas with the irrigation and drainage conditions and especially suitable for improving the highly-saline soil of the coastal mud flat reclamation area.

The invention provides a full road condition ponding water level monitoring alarm and drainage device and belongs to the field of ponding monitoring alarm and drainage devices for traffics. The device is characterized by comprising a road ponding monitoring device, an overpass tunnel ponding monitoring device, a water level monitoring display device, a water level monitoring alarm device and an automatic drainage device. The road ponding monitoring device and the overpass tunnel ponding monitoring device are connected with the water level monitoring display device. The device can monitor the ponding water level of various road conditions in real time, and transmit data to a monitoring center in real time, and the data can also be directly displayed to serve as action reference for municipal administration and passers-by. In addition, the device can drain water intelligently and actively according to the monitored water level data, and urban water logging is avoided.

A coal-bed gas multi-branch horizontal-well system is applied to exploitation of coal-bed gas wells. The coal-bed gas multi-branch horizontal-well system is characterized by being composed of a multi-branch horizontal-well and two discharging and exploring straight wells, wherein the multi-branch horizontal-well is respectively communicated with the two discharging and exploring straight wells, the communication positions are arranged on a stable coal-bed top plate or a base plate, and a main branch drills in from the stable coal-bed top plate or the base plate. The branches are drilled on the main branch and drill into a coal-bed. Range branches are drilled on each branch, and each range branch drills through a dirt band layer in the coal-bed. The coal-bed gas multi-branch horizontal-well system is applicable to a monoclinic coal-bed which is provided with the stable top plate or the base plate. A stable coal-bed gas multi-branch horizontal-well system well washing channel is provided, and water discharging and gas exploitation are separated. The coal-bed gas multi-branch horizontal-well system has the advantages that a main well bore of the coal-bed gas multi-branch horizontal well is stable and capable of being repeatedly entered into, the problem of collapse in the discharging and exploring process can be solved, the stable discharging and exploring channel is supplied through the main branch, discharging and exploring area is controlled through the branches, the coal-bed is dredged through the range branches, and exploring production amount of the coal-bed gas is improved.

In a fuel cell structure having an assembly of an electrolyte layer and an electrode formed on the electrolyte layer, a gas separator 25 is laminated on the electrolyte layer and the electrode and forms, in combination with the electrode, a gas flow path to make a flow of a reactive gas that is subjected to an electrochemical reaction. A first water guide element is provided between the electrode and the gas separator 25 and is arranged to enable migration of water from and to the electrode and to continuously guide water in an electrode plane direction. A gas outlet 68 is open at one end of the gas flow path to be at least partly overlapped with one end of the first water guide element and discharges the flow of the reactive gas from the gas flow path. The gas outlet 68 is designed to have a higher flow resistance of the reactive gas than a flow resistance in the gas flow path. This arrangement effectively improves the water discharge efficiency from the gas flow path formed in the fuel cell structure.

The invention relates to a method for promoting rapid drying of dredged silt by a microorganism. The method includes: taking straw and other organic matters as a substrate, conducting anaerobic fermentation and decomposition, burying the substrate in a silt storage yard, pre-burying a vacuum pumping pipe network system, inputting dredged silt, and then adding a flocculant and a coagulant aid to perform initial concentration, vacuum pumping, compression and other processes. The method for promoting rapid drying of dredged silt by a microorganism makes use of life activities of the microorganism and the produced gas to change the compact silt state formed during vacuum pumping, makes the silt become loose and porous, promotes flow of moisture, thereby improving the water pumping and drainage effect of vacuum preloading, and transforming the dredged silt from a fluid state to a plastic state or semi-solid state rapidly. Thus, the method realizes rapid dewatering and drying of dredged sludge, and has the characteristics of low cost and short construction period.

The invention relates to a gas well automatic water draining plunger. The gas well automatic water draining plunger comprises a plunger barrel with a through hole formed in the axial direction. The plunger barrel is internally provided with a control mechanism partitioning the through hole into an upper cavity and a lower cavity. The plunger barrel at least comprises a first barrel unit and a second barrel unit, and the outer diameter of the first barrel unit is greater than that of the second barrel unit. The first barrel unit and the second barrel unit are internally provided with limiting grooves. The second barrel unit is provided with a bypass channel which can communicate with the through hole in the radial direction of the limiting groove. The control mechanism is provided with an elastic sensitive element capable of converting differential pressure between the upper cavity and the lower cavity into axial displacement, and an actuating element which is connected with the elastic sensitive element and is capable of sliding back and forth along the limiting groove under the action of the elastic sensitive element so as to open / close the bypass channel. The plunger can control the bypass channel to open / close through the elastic sensitive element according to changes of the well bottom dropsy degree while achieving non-shut-in continuous production, automatic liquid draining is achieved, and the liquid draining frequency is controlled to be the optimal level.

In a precast cladding panel system requiring no cast-in mounting hardware, each panel has a continuous notch along its upper edge, forming a ledge adjacent the panel's front face, and an upstand adjacent the panel's rear face. Each panel is mounted to a supporting structure using fasteners installed through openings formed in the upstand. The panels are configured such that their lower edges fit into the notches of underlying panels, with the front faces of all panels being substantially co-planar, aided by spacer means fastened to the supporting structure adjacent to the lowermost panel course. Air circulation behind the installed panel assembly is facilitated by spaced bumpers fastened to the supporting structure so as to space the panel upstands away therefrom. Alternatively, the panels may be mounted with the upstands directly against the supporting structure, with the panels having vertical air channels formed into the upstands and rear panels faces as appropriate.

The invention relates to a large-area soft soil foundation duplex negative consolidation processing method, comprising the following processes of: step 1, negative pressure consolidation: (a) paving plastic woven cloths in an area to be processed, driving a vertical plastic drainage board and a vertical plastic soak-away trench; (b) paving a main pipe and a branch pipe, wherein the vertical plastic drainage board and a transverse plastic drainage board are connected with the branch pipe; (c) paving a geo-membrane, and paving two to three sealing membranes on the geo-membrane; (d) excavating a side ditch pressing membrane; (e) installing a vacuum pump to vacuumize for negative pressure precipitation, wherein the main pipe is connected with the vacuum pump; step 2, well point dynamic arrangement: (a) inserting a well point pipe in a hole inserted by a vertical plastic soak-away trench or nearby the hole; (b) paving the branch pipe, the main pipe and the vacuum pump, carrying out the well point dynamic arrangement; and step 3, dynamic consolidation: a) precipitating and dynamically compacting in the first and second times, carrying out precipitation and dynamic compaction processes on the area to be processed for several times, carrying out multiple rounds of point compactions and finally carrying out a full compaction. According to the large-area soft soil foundation duplex negative consolidation processing method, the bearing capacity of the processed field is higher, the hard crust is thicker and the post-construction settlement is less.

A heat exchanger for use as an evaporator includes a heat exchange core having a plurality of heat exchange tubes arranged in a left-right direction at a spacing, and a refrigerant turn tank as a lower tank disposed toward a lower end of the heat exchange core. The heat exchange tubes are inserted through respective tube insertion holes formed in the turn tank and joined to the tank, The turn tank has drain grooves each extending from a forwardly or rearwardly outer end of each of the tube insertion holes for discharging condensation water to below the turn tank therethrough. Each of the drain grooves has a bottom extending gradually downward as the bottom extends away from the tube insertion hole. When the exchanger is used as the evaporator, the top surface of the turn tank can be drained of water with an improved efficiency

The invention relates to a spherical solid foam scrubbing agent for a natural gas fluctuation horizontal well in gas field foam drainage gas recovery production. Lifting can be automatically controlled at a horizontal extension section of a horizontal well to improve the drainage gas recovery effect of the horizontal well. According to the technical scheme, the spherical solid foam scrubbing agent is a multi-layer concentric sphere and is prepared from 25-45% of sodium dodecyl sulfate, 10-35% of fatty alcohol-polyoxyethylene ether, 10-25% of acrylic resin, 0-40% of sodium bicarbonate and 5-10% of urea. The spherical solid foam scrubbing agent is composed of multiple foam scrubbing spheres, and foam scrubbing agents with different formulas and densities are adopted for manufacturing 3-9 layers to form a concentric sphere which is pressed and toasted to be dry to form the spherical solid foam scrubbing agent; the foam scrubbing agent is placed into the horizontal well, sunk and dissolved and ascends to the extension section of the whole horizontal well, and foam drainage gas recovery is achieved. By means of the spherical solid foam scrubbing agent, the drainage efficiency of the horizontal well is improved, accumulated liquid can be smoothly drained, and use is convenient, easy and economical.

A disposable drain strainer for a pop-up and basin drain includes a top opening to accommodate the upward position of the pop-up drain stopper during drainage of the basin / sink or bathtub. The disposable drain strainer has a strainer portion, a ring portion, and at least one adjustable leg. The strainer portion comprises strainer walls abutting a strainer top shelf having a top opening. At least the strainer walls include a plurality of apertures for drainage. The top opening is appointed to engage and receive a pop-up drain stopper when the stopper is in an opened position as during draining. The ring portion fixedly attached to the strainer walls of the strainer portion. At least one adjustable leg is provided arranged adjacent to the top opening and being appointed to engage with the stopper when the stopper is in the opened position. Advantageously, the top opening and adjustable legs engage the pop-up drain stopper when it is opened during drainage so that the strainer optimally provides filtering of debris.

The invention discloses a medical percutaneous transhepatic biliary drainage device for a general surgery department. The device comprises a base, a workbench and a waste liquid collection tank positioned on one side of the workbench are fixedly mounted at the top of the base, a supporting plate fixedly mounted on one side of the workbench is arranged above the waste liquid collection tank, and apiston is movably arranged in a piston barrel which is fixedly mounted at the top of the supporting plate. The medical percutaneous transhepatic biliary drainage device is integrally simple in structure, convenient to use and capable of quickly draining hydrops at an affected part of a patient, drainage efficiency is improved, medical workers do not need to ceaselessly operate a suction device forsucking hydrops, and accordingly workload of the medical workers is relieved; by a sewage pump, convenience in liquid discharge is achieved; due to a great damping effect of the sewage pump in operation, noise pollution caused by vibration is abated, and physical and mental health of people is benefited.

A heat exchanger for use as an evaporator includes a heat exchange core having a plurality of heat exchange tubes arranged in a left-right direction at a spacing, and a refrigerant turn tank as a lower tank disposed toward a lower end of the heat exchange core. The heat exchange tubes are inserted through respective tube insertion holes formed in the turn tank and joined to the tank. The turn tank has drain grooves each extending from a forwardly or rearwardly outer end of each of the tube insertion holes for discharging condensation water to below the turn tank therethrough. Each of the drain grooves has a bottom extending gradually downward as the bottom extends away from the tube insertion hole. the exchanger is used as the evaporator, the top surface of the turn tank can be drained of water with an improved efficiency.

The invention relates to an automotive vehicle driving assisting camera capable of being self-cleaned. The automotive vehicle driving assisting camera comprises a shell body, a front cover, a photographing element, a protective lens assembly, a driving assembly and a water spraying element, wherein an opening is formed in the front side of the shell body; the front cover is assembled at the opening of the shell body; the photographing element is fixedly mounted in the shell body; the protective lens assembly is arranged between the photographing element and the front cover in a rotatable manner; the driving assembly is used for driving the protective lens assembly to rotate; the water spraying element is arranged between the protective lens assembly and the front cover; the protective lens assembly comprises a lens and a lens framework; the driving assembly is in transmission connection with the lens framework; a photographing window is arranged on the front cover; a camera lens of the photographing element is arranged towards the photographing window; a water discharging hole is formed in the shell body; a wiper, which is fixed relative to the front cover, is arranged between the lens and the front cover; and the wiper is in elastic contact with the lower part of the front side face of the lens. According to the automotive vehicle driving assisting camera, the lens is effectively cleaned by adopting the wiper and the photographing element can acquire a clear image.

The invention relates to the technical field of drainage of low-permeability geotechnical engineering, in particular to a permeation increase siphon drainage system for a low-permeability soil slope. The permeation increase siphon drainage system is especially suitable for engineering drainage of low-permeability-coefficient water-rich strata. The permeation increase siphon drainage system is composed of a water-permeable concrete fracturing injection system and a siphon drainage system body. For the loess slope with low permeability and collapsibility, water-permeable concrete is pressed into the loess slope with low permeability, a high-permeability network channel is formed, and the range of influence that a cone of depression is generated by a single siphon drainage hole is widened. By means of a high-permeability water-permeable network, the drainage efficiency is increased; based on the high-lift siphon principle, redundant underground water in the slope is automatically and efficiently drained in real time, the underground water level of the slope can be controlled to be blow the safety water level, and no external power is needed; and the beneficial effects of being low in manufacturing cost and high in efficiency are achieved.

In a precast cladding panel system requiring no cast-in mounting hardware, each panel has a continuous notch along its upper edge, forming a ledge adjacent the panel's front face, and an upstand adjacent the panel's rear face. Each panel is mounted to a supporting structure using fasteners installed through openings formed in the upstand. The panels are configured such that their lower edges fit into the notches of underlying panels, with the front faces of all panels being substantially co-planar, aided by spacer means fastened to the supporting structure adjacent to the lowermost panel course. Air circulation behind the installed panel assembly is facilitated by spaced bumpers fastened to the supporting structure so as to space the panel upstands away therefrom. Alternatively, the panels may be mounted with the upstands directly against the supporting structure, with the panels having vertical air channels formed into the upstands and rear panels faces as appropriate.

The embodiment of the invention discloses a production increasing method of coalbed gas, comprising the following steps of: controlling a horizontal-section well bore to be a non-bifurcation well bore and to communicate with a distal vertical well under the condition that the overall angle change rate of the horizontal-section well bore trace is within 10 degrees / 30m when drilling the horizontal section of the well bore; mounting a horizontal-section completion casing along a second-spudding casing after the horizontal-section well bore is finished; after the mounting of the horizontal-section completion casing is finished, hydraulically spraying on the wall of the horizontal casing to drill branch well bores, or carrying out the sectional compression fracture on the wall of the horizontal casing. In the embodiment of the invention, because the horizontal section is provided with the casing, a well wall support can be formed, and the well bore is not easy to be blocked due to carrying out various production increasing processes when the horizontal-section well bore is collapsed; in addition, the embodiment of the invention further can achieve the re-mounting and circular cleaning of the horizontal well bore so as to effectively increase the gas production rate of the coalbed gas well.

The invention discloses an intelligent pump station drainage scheduling control system. The technical scheme includes that the intelligent pump station drainage scheduling control system comprises a data detection unit, a mode selection unit, a scheduling unit and a control unit; the data detection unit is used for acquiring liquid level signals of water inlet pool and a water outlet pool of an individual pump station, pressure signals of a water outlet pipe in the individual pump station and flow signals of the water outlet pipe of the individual pump station; multiple low-level mode interfaces are configured in the mode selection unit, and the low-level mode interfaces are used for acquiring selection requests of users; the control unit is configured in the manner of establishing a constant level mode, a constant pressure mode and a current limit mode corresponding to each low-level mode interface and entering the corresponding constant level mode, constant pressure mode and currentlimit mode. The pump stations can be mutually scheduled, disorderly drainage between the upstream and downstream pump stations is avoided, drainage orderness of the overall pump station is effectivelyimproved, and drainage efficiency is improved.

The invention relates to the technical field of fluid analogue simulation preloading of full framings, and discloses a fluid analogue simulation preloading method of a full framing. The method comprises the following construction steps: 1) laying bottom templates, web templates and end templates on the full framing; 2) stacking steel bar materials on the web templates; 3) covering the bottom templates, the web templates, the concrete-iron materials and the end templates by utilizing waterproof cloth so as to form a water-tank structure; 4) injecting water in the water-tank structure, and performing preloading monitoring; and 5) after finishing preloading monitoring, draining water in the water-tank structure. The fluid analogue simulation preloading construction method of a full framing, provided by the invention, has the advantages that materials are saved, and the construction cost is reduced; the construction time is shortened, and other equipment materials are saved; vertical loads are applied on the full framing, and horizontal force generated to a supporting system during concrete pouring is simulated, so that the web templates are prevented from deforming and bursting during concrete pouring, and a uniform preloading effect can be reached.

The invention discloses an in-trench water-stone separation siphoning-drainage debris flow control method. A series of permeable pipes are disposed in a trench in an area for formation or passage of debris flow, and drain siphons are connected to downstream ends of the permeable pipes. When the water level of rain flood reaches the siphoning level, water permeating into the permeable pipes is drained to the downstream safety trench through the drain siphons so that dynamic strength of the water in the trench is reduced. Using the method can effectively control formation and passage of debris flow and solve treatment methods for debris flow trenches on different scales, and control engineering is simple in construction and high in adaptability. Gravity flow is converted into full in-pipe flow under the action of siphoning drainage, and drainage efficiency is improved. Pipe sedimentation can be prevented under the suction action of siphoning. Diverted drainage in the case of high water level has low impact on the hydrological environment of the trench.

The invention discloses a thermal insulation, waterproofing and drainage system for a tunnel of an alpine region. The system comprises a tunnel arch wall, a tunnel invert and an invert filling layer and also comprises a waterproofing and drainage system of the arch wall and an internal drainage system of the tunnel, wherein the waterproofing and drainage system of the arch wall comprises a self-adhesive type waterproofing board, an annular blind pipe and a longitudinal water-permeable pipe for arch feet; the internal drainage system of the tunnel comprises a center drainage pipe, an inspectionwell, a longitudinal water-permeable pipe for an arch bottom, an unidirectional thermal insulation and drainage pipe and side ditches; and both the tunnel arch wall and the tunnel invert are internally provided with VIP thermal insulation and waterproofing boards. By arranging fully-covered VIP thermal insulation and waterproofing boards between primary support and secondary lining of the tunnelinvert, on the premise of ensuring the temperature in each water-permeable pipe, deeply-buried center ditches are lifted to shallow positions, thereby improving the safety of tunnel construction and greatly reducing the construction quantity; and in a new design scheme, VIP thermal insulation, waterproofing and drainage materials are adopted in the tunnel arch wall, so that the waterproofing and drainage capabilities and efficiency in the tunnel can be greatly improved.

The invention discloses a toilet floor drain assembly and a mounting method. The toilet floor drain assembly comprises a floor drain and a waterproof bottom box, wherein the waterproof bottom box comprises a bottom box surrounding edge and a waterproof plate which are connected, the waterproof plate comprises an inclined plane and a horizontal plane which are arranged oppositely, the bottom box surrounding edge is connected onto the inclined plane and comprises a first end and a second end which are arranged oppositely, the distance from the first end to the horizontal plane is smaller than the distance from the second end to the horizontal plane, a groove is formed in the inclined plane, the groove extends to the first end of the bottom box surrounding edge in the width direction and extends to two side surfaces, adjacent to the first end, of the bottom box surrounding edge in the length direction, and a first draining hole is formed in the groove; and the floor drain is embedded in the groove, a second draining hole is formed in the floor drain, and the first draining hole communicates with the second draining hole. The mounting method of the toilet floor drain assembly is used for mounting the toilet floor drain assembly. According to the provided toilet floor drain assembly and the provided mounting method, the draining efficiency of the toilet floor drain assembly is improved.

A pneumatic tire simultaneously achieves improved water discharge characteristics and reduced noise. Fundamental water discharge performance is secured by providing a tread (12) with a first circumferential main groove (14), a second circumferential main groove (16), and a third circumferential main groove (18). V-shaped grooves (36) connected to the first circumferential main groove (14) are formed in a second land section (22) in a tread center region, and this secures water discharge characteristics and eliminates high frequency noise. On the other hand, L-shaped grooves (52) connected to the third circumferential main groove (18) are formed in a fourth land section (26) located on the side facing the vehicle, and this secures water discharge characteristics and eliminates high frequency noise. Excellent water discharge and low noise characteristics are simultaneously achieved by positioning the V-shaped grooves (36) on the side opposite the vehicle when the tire is mounted on it and positioning the L-shaped grooves (52) on the vehicle side.

The invention relates to the field of foundation pit supporting, in particular to a foundation pit supporting structure and a construction method thereof. According to the specific scheme, the foundation pit supporting structure comprises a foundation pit and a plurality of mutually-spliced protection plates, each protection plate is provided with a supporting pipe, one side wall of each protection plate is provided with a through groove for containing the corresponding supporting pipe, and the supporting pipes are detachably connected into the through grooves. A plurality of water seepage holes are formed in the ends, extending out of the through grooves, of the supporting pipes, adjusting assemblies used for adjusting the water seepage amount of the water seepage holes are arranged in the supporting pipes, the two ends of the supporting pipes are both closed ends, a drainage cavity is formed in each protection plate and located in the lower portion of each through groove, the throughgrooves and the drainage cavities communicate with communicating holes, and drainage holes are formed in one sides of the supporting pipes. The drainage holes communicate with the communicating holes, a water storage tank is arranged on the foundation pit, a water suction pump is arranged in the end, away from the bottom of the foundation pit, of each protection plate, drainage pipes are arrangedbetween the water suction pumps and the water storage tank in a communicating mode, and water suction pipes are arranged between the water suction pumps and the drainage cavities in a communicating mode.

The invention provides a sponge city ecological municipal road, and belongs to the technical field of sponge cities. The sponge city ecological municipal road includes a sidewalk, permeable granite step bricks, an emergency permeable hole, a permeable concrete base layer, a permeable asphalt layer, a water diversion slope bearing layer, a water diversion slope surface, a bearing substrate, a watergathering channel, a channel side wall, a sand-gravel layer, a filtering layer, a geotechnical cloth filtering layer, a gravel filtering layer, an activated carbon filtering layer, a rainwater well,a drainage well cover, a water storage tank, an emergency water diversion pipe, a lawn, soil, a permeable sand layer, a water pumping pipe, a water pump, a road base layer, a municipal pipe network, an irrigation water pipe, an atomizer, a collecting pipe, a closed pipe, an excess preventing pipe, a channel bottom wall and kerb. The sponge city ecological municipal road has the advantages and effects that accumulated water on the road can be timely recycled to the underground for discharging and storing so as to ensure normal passing of the road in rainy days, the water quality is improved tothe maximum extent, and the sponge city ecological municipal road is of great significance to realize the goal of water ecological restoration.

An improved cleaner for paint spray guns in use on an assembly line comprises a vessel having an inlet, a drain and a port for receiving an atomizer of a spray gun. An impeller is rotatably mounted within the vessel in fluid communication with the inlet. The impeller has an offset cleaning nozzle for projecting a cleaning spray towards the port, a rotational nozzle for projecting a rotational spray to effect rotation of the impeller. The impeller also has an independently controlled central nozzle cleaning nozzle. The cleaner has an air wipe down for removing excess solvent from the atomizer of the spray gun as it leaves the cleaner following a wash cycle. The cleaner comprises a helical flushing means and a solvent purge assembly to clean the inner walls of the vessel. An air and solvent separation fitting provides improved solvent drainage efficiency.