1255 results about "Pipeflow" patented technology

A light-weight, modular, adjustable vertical hydroponic growing system and method of Native American design for cultivation plants and beneficial soil organisms (BSO's) in symbiotic combination. Forest-like arrays of fully rotatable and demountable grow tubes are suspended within climate-moderating greenhouses, optionally from conveyor tracks. The tubes are filled with light-weight, porous 100% in-organic grow media predominately comprised of expanded volcanic or recycled glass granules. The grow tube arrays are provided with an insulated, overhead-mounted fertigation distribution system delivering metered intermittent flows from insulated mixing and holding tanks. The flows are recycled via an insulated return piping system to maintain cool fertigation temperatures near those of natural ground water. Fertigation supply mains provided with vortex flow induction devices impart rotational momentum to flows for delivery of uniform aerated fertigation to plants and BSO's via a combination of open-tube emitters and gravity flows within grow tubes.

The invention discloses a submarine shallow layer natural gas hydrate pilot hole pull-back jet break-up exploitation method and exploitation device, and belongs to the technical field of submarine hydrate exploitation. The exploitation method mainly comprises the following steps that a water insulation pipe is lowered to the position adjacent to a hydrate deposit, turn drilling is conducted in thehydrate deposit by means of mechanical or jet-flow drilling, and a pilot hole with a certain inclined angle is formed; after drilling reaches a preset position, a continuous pipe and an exploitationcrushing system are pulled back, meanwhile the surrounding hydrate ore body is crushed by means of a spray head jet flow, hydrate particles formed are collected into a closed pipeline with seawater, silt in the crushed particles is separated out by means of an in-pipe downhole separator, curing agent is added, then the particles are backfilled to a gob in situ, and the hydrate particles after separation are pumped to the sea surface for treatment together with the seawater. By means of the exploitation method and the exploitation device, efficient, safe and sustainable exploitation of the submarine shallow layer natural gas hydrate is achieved, the exploitation efficiency is ensured, and meanwhile a potential safety problem is effectively avoided.

The invention relates to an in-situ thermal response testing method of stratified thermal properties of underground rock and soil. The invention relates to an in-situ thermal response testing device of the stratified thermal properties of the underground rock and soil. According to the in-situ thermal response testing device disclosed by the invention, a U-shaped pipe is buried, an optical fiber temperature sensor is inserted into two branch pipes of the U-shaped pipe, the U-shaped pipe is connected with an inlet and outlet of a circulating water pipeline of a ground testing device, water temperatures in the two branch pipes, namely the water inlet branch pipe and the water outlet branch pipe of the U-shaped pipe in different depth layers are respectively measured, the power of a heater is kept constant, and measured data of the water temperatures and the flow rates of circulating water in the two branch pipes of the U-shaped pipe in different depth layers at different times, as well as the corresponding heating power of the heater is recorded, so that a heat conduction coefficient, volume specific heat and a drilling thermal resistance value of soil in each layer can be obtained. According to the in-situ thermal response testing device disclosed by the invention, the defects that the distribution of the thermal properties of the rock and soil in different depths can not be obtained, the testing precision can not be improved, an optimal design method of the underground buried pipe can not be improved and the like in the prior art can be solved; furthermore, values of the thermal properties of the underground rock and soil, the types of the rock and soil, the contents of underground water and the seepage situations in the different depths can be obtained, and the in-situ thermal response testing device further has the advantages of high sensitivity, strong anti-interference property, corrosion resistance, small installation size, no requirements on a power supply and low testing cost.

The invention provides a multi-layered aquifer underground flow system-based underground water pollution simulator, which comprises a simulation groove, a pressure measurement device, water head adjustment devices and a rainfall device, wherein the simulation groove comprises a seepage groove, an upstream water tank and a downstream water tank which are positioned on two sides of the seepage groove; front and back sides of the seepage groove are respectively provided with uniformly distributed sampling holes and pressure measurement holes, and the pressure measurement holes are connected with the pressure measurement device; two water head adjustment devices correspond to the upstream water tank and the downstream water tank respectively, and each water head adjustment device comprises a bracket, an overflow box, a water pipe and a lift rod; the rainfall device is positioned above the seepage groove, rainfall holes are uniformly distributed on a pipeline of the rainfall device; and one end of the pipeline is sealed, and the other end of the pipeline is connected with a water source. The multi-layered aquifer underground flow system-based underground water pollution simulator can simulate an underground waterflow system of a plurality of aquifers and aquitards, is convenient in measurement, and has small error.

The invention integrates the functionality of: kerbs, gutters, pathways, into a surface accessible networked utility ducting system and a a rain and run-off water management system.It is comprised of a base section formed a combination of one or more open topped utility access channels, an open topped water catchment channel, a slopped flange and one or more open sided access and or open topped feeder line distribution channels.The invention includes features for the isolation of electric power channels from contact with other utilities such as gas, water, or communications.The invention includes features for, integration with existing stormwater systems such as overflow points.The invention provides utilities access pathway all the way to an end users premises with minimal need for digging or disturbance of footpaths or paved surfaces this is a major improvement upon the prior art which tranforms the economics of surface accessible utility ducting systems.The invention includes covers, which are interchangeable, may take various forms, such as a pavement and kerb, a driveway ramp or a wheel chair access ramp. This allows the invention to be economically adapted to changes in kerb requirements as changes to the pathways and kerbs occur along their length and as requirements change over time, this solves the problems associated with the prior art which can not be readily adapted to all the variations found in kerbs and gutters along the length of the kerb and pavement or as they occur over time.The invention enables rain and run-off water to be isolated from contamination and managed to preserve its value and usefulness.The invention lowers the cost of, and, increases the speed, of new service deployment thereby overcoming the major economic barriers to market entry of new distributed utility services.The invention is to be manufactured in most cases as precast modules. The channels, lids, access boxes are linked by flexible interstitial joints which enable the system so formed to change direction to conform with the contours of the landscape in which it is located. In most cases the material of construction will be a dense, reinforced material such as concrete. When so constructed the invention will resist the effects of earthquakes, cyclones, flooding, tornados, and tsunamis.

The invention relates to the technical field of rainwater collection and processing, and discloses a novel rainwater retention infiltration system. The novel rainwater retention infiltration system comprises a pre-processing tank and a retention infiltration tank, wherein the pre-processing tank is arranged at the outer side of the retention infiltration tank; the pre-processing tank and the retention infiltration tank are separated by virtue of a perforated partition board; gravels are kept in the pre-processing tank; the retention infiltration tank is sequentially provided with plants, a water storage layer, a coverage layer, a planting soil layer, a packing layer, an isolating layer and a gravel layer in a thickness direction; a drainage pipeline is arranged in the gravel layer of the retention infiltration tank; an overflow pipe is vertically arranged in the retention infiltration tank; one end of the overflow pipe communicates with the drainage pipeline and the other end is exposed out of the retention infiltration tank; and a reoxygenation pipe is arranged in the packing layer. With the application of the system provided by the invention, stormwater runoff pollution load can be effectively reduced, rainwater runoff volume and peak can be diminished and the problem that the system gets blocked can be effectively prevented; and the system is simple in structure, low in maintenance cost, simple and feasible in implementation and broad in application scope.

The invention discloses a circulating-water-flow wave flow testing device. The circulating-water-flow wave flow testing device comprises a testing water tank, a flow making system, a wave making system and a collecting control system. A closed water flow vertical circulation loop with the communicated interior is formed by the testing water tank and a circulating pipe, the circulating pipe is located under the testing water tank, the testing water tank is filled with water, and movement water flow is generated through driving of an axial flow water pump. A wave making machine is characterized in that a push plate is driven by a motor to perform linear reciprocating movement, a water body in the water tank is pushed to generate waves, a wave eliminator with the adjustable gradient is arranged, and influences of reflecting waves on testing are eliminated. The collecting control system is responsible for controlling wave flow in the testing water tank and collecting data. According to the circulating-water-flow wave flow testing device, large and high-speed water flow and different kinds of waves are generated in the testing water tank, the reflecting waves can be eliminated, and a reliable technological means is provided for making experiments in the wave and flow power environment.

A water level automatic control system of a landslide physical model test comprises water tanks, a control cabinet and a slope surface information acquisition device. Two water tanks are respectively arranged at the front and at the back of a landslide physical model test frame. Side faces of the two water tanks, which are contacted with a landslide model, are respectively provided with a plurality of groups of water feeding and discharging holes. Bottoms of the water tanks are connected with water inlet pipelines and water outlet pipelines respectively, water pumps and water inlet electromagnetic valves are arranged on the water inlet pipelines, and water outlet electromagnetic valves are arranged on the water outlet pipelines. Liquid level transmitters for monitoring water levels in the water tanks are arranged in two water tanks, the control cabinet is respectively connected with all the liquid level transmitters, the water pumps, the water inlet electromagnetic valves and the water outlet valves and used for receiving water level signals and controlling opening and closing of the water pumps and the electromagnetic valves, and the slope surface information acquisition device is arranged above the water tank arranged at the front of the landslide physical model test frame. The water level automatic control system of the landslide physical model test can monitor parameters of landslide surface displacement and the like under the condition of stored water level variation precisely and comprehensively and provide an important basis for landslide stability studies.

A floating solar array made of a closed loop of flexible high density polyethylene pipes with elbows, T fittings and couplings. An anti-lift membrane fills with water and mitigates the wind forces. The array can have a stabilizing skirt going downwardly from the border of the array, especially when it is used offshore in the sea. A vertical axis tracking system with windlasses, two anchoring points and four mooring lines allows all the solar panels to face the sun throughout the day. For small lakes or mine tailing, the two anchor points will be onshore, on a concrete foundation. Winches to wind and unwind the mooring lines are located at the anchor point or on the solar array. For larger water areas, or offshore applications in the sea water, the anchor points are under water; using typically a concrete block or a suction pile solution for each anchor.

The present invention is generally directed to a system, device and method for removing a layer of sediment formed on the bottom of a pond. A submersible vacuum unit associated with in-line import and export sections made from at least 2 inch diameter tubing is supported by a single ski or wheel that is in contact with the pond bottom surface, with a flexible hose connected to the export and directed outside the pond for disposal or filtering of suctioned water. In certain embodiments, leaf / debris bagging mechanisms or mulching mechanisms are employed to facilitate removal of large debris from pond bottoms, while fine silt material is contained in a region and suctioned off the bottom surface.

An artificial rainfall runoff and soil water motion simulation experimental system comprises a rainer, a runoff and soil water forming device, a water drainage device and a runoff volume measuring device. The rainer comprises a water supply device and a raindrop forming device; the water supply device adjusts water outlet strength by an adjusting valve and a flow meter; the raindrop forming device is a group of pipes with holes; the runoff and soil water forming device is a vertical container with a soil layer; the group of pipes with holes is arranged on the top of the vertical container and can be adjusted in a lifting manner; and the container comprises an inner wall on the inner layer and an outer wall on the outer layer, the inner wall consists of a water permeable steel wire gauze, the outer wall is made of a transparent material, the inner wall and the outer wall are connected with each other by a water impermeable layering steel plate, the water drainage device is arranged below the soil layer, a water leading pipe which is connected with the runoff volume measuring device is arranged outside the container, and the runoff volume measuring device performs data processing and operation by a computer. The artificial rainfall runoff and soil water motion simulation experimental system is convenient to carry, high in experimental efficiency, accurate and fast in operation and high in adaptability.

Described is a non pressure compensated drip emitter with multiflow facility, the drip emitter being placed inside a pipe of a drip irrigation system, the drip emitter comprising: a housing; a filter system being fitted at each inlet to ensure pure supply of water inside the emitter; three pools of water from only one of which water get discharged out of emitter and from emitter to the land to be irrigated, the third pool in the middle; a labyrinth in fluid communication with each pool and the filter system, the labyrinth comprises zigzag water paths; wherein the labyrinth connects middle pool with remaining two pools through the zigzag water path in such a way that even in case of partial clogging of the zigzag water path, the remaining partial zigzag water path remain active and ensure the discharge of water at a selected flow rate from the emitter.

An underground reservoir for storing water in alluvial deposits utilizes slurry walls keyed to an aquiclude beneath the reservoir to form a substantially impermeable water seal. A variety of water extraction / recharge apparatus provides for rapid and complete filling and draining of the underground reservoir. Such apparatus includes a plurality of wells distributed about the underground reservoir and a series of perforated pipes buried at a predetermined depth within the underground reservoir. A method of mitigating water table fluctuations resulting from the construction of an underground utilizes perforated pipes buried outside of the reservoir to transfer excess water from an uphill land parcel to a downhill land parcel that would otherwise experience a water shortage after construction of the underground reservoir.

A gutter inlet automatic overflow pollutant intercepting device comprises a clamping seat. At least one extensible rod is connected with the portion below the clamping seat. The lower end of the extensible rod is connected with a metal support. The metal support and the extensible rod are sleeved by a filter screen. The gutter inlet automatic overflow pollutant intercepting device is characterized in that the clamping seat comprises a grease absorbing cable clamping groove. According to the gutter inlet automatic overflow pollutant intercepting device, pollutants entering a gutter inlet is intercepted through the pollutant intercepting filter screen, so that the gutter inlet and a rainwater pipeline are prevented from being blocked, and the water discharging capacity of a rainwater pipeline network is improved; the pollutants are controlled from a source through the rainwater pipeline network, so that disposing pressure of a sewage disposal plant and pollution to city water by runoff pollution are reduced. Grease type pollutants in runoff rainwater can be effectively controlled through the arrangement of a grease absorbing cable, so that the following disposing cost of the sewage disposal plant and the pollution of city water are reduced, and the gutter inlet automatic overflow pollutant intercepting device has obvious environment and economic benefits. According to the gutter inlet automatic overflow pollutant intercepting device, the structure of an existing gutter inlet is not changed, the improving cost of the gutter inlet is reduced, and the gutter inlet automatic overflow pollutant intercepting device is simple in structure, practical and low in production cost.

A method for the creation of subsurface water management systems that place subsurface drainage lines at a consistent grade and within defined elevation bounds throughout a field with topographical undulation and inconsistent slopes, incorporate control weirs for dividing the subsurface into elevation and acreage zones, place and size surface to subsurface, size and determine inside surface of drainage mains and laterals according to the desired coefficient of the subsurface system, and determine the amount of water required at irrigation inlets in order to deliver a determined amount of water into the subsurface system for purposes of irrigation.

The invention relates to a rain collection self-pressure irrigation system for loess plateau hilly area step greenhouses, which comprises greenhouses, ground water collection surfaces, water collection flow gathering ditches, water reservoirs and irrigation pipelines, wherein the greenhouses are arranged on the steps of a terraced field, the ground water collection surfaces, the water collection flow gathering ditches, the water reservoirs and the irrigation pipelines are arranged on the steps, the greenhouses comprise greenhouse ceiling water collection surfaces, the water collection flow gathering ditches are arranged along the lower edges of the greenhouse ceiling water collection surfaces, the ground water collection surfaces are in inclined arrangement, the lower sides of the ground water collection surfaces are connected with the collection flow gathering ditches, one sides or two sides of the water collection flow gathering ditches are provided with the water reservoirs, and the irrigation pipelines are arranged in the greenhouses and are connected with the water reservoirs of the previous steps through main pipelines. The greenhouses are built on the terraced field, the collected rain at the previous step of the terraced field is used for irrigating the greenhouse on the next step of the terraced field, the rain resources are sufficiently and reasonably developed and utilized for developing the facility agriculture, and the ecological system is prompted to be converted to the benign circulation.

The invention discloses an urban rainwater-infiltration ecological system based on low impact development, which comprises a bearing plate with a water drainage port, wherein a bearing bracket is fixedly arranged below the bearing plate; a rainwater infiltration area is formed between the bearing bracket and the bearing plate; the rainwater infiltration area comprises a composite filler layer having functions of purification, filtration and water retention; a certain space is reserved between the bearing plate and the composite filler layer to serve as a water reservoir bed; an overflowing pipe connected with an external water drainage pipe is arranged on the water reservoir bed; and a perforated water drainage pipe connected with the external water drainage pipe is embedded at the bottom of the composite filler layer. The urban rainwater-infiltration ecological system based on low impact development is simple in structure, has the function of purifying the water quality and storing the water, and can be effectively combined with the municipal ground.

The invention provides a deepwater circulating and enhanced coagulating sedimentation algae-removing water treatment system and a treatment method, belonging to the technical field of feed water treatment. The deepwater circulating and enhanced coagulating sedimentation algae-removing water treatment system comprises a water supply pump, a water treatment tank and a drug feeding device, wherein the water supply pump and the drug feeding device are respectively connected with the water treatment tank through a pipeline; the deepwater circulating and enhanced coagulating sedimentation algae-removing water treatment system is characterized by being provided with a deep water circulating well for stressing air bags in the algae crack; the circulating well is provided with an inlet and an outlet; the inlet of the circulating well is connected with the water supply pump; and the outlet of the circulating well is connected with the water treatment tank. The water supply pump injects algae-containing water into the circulating well and enters the water treatment tank; the air bags in algae cells crack under high-pressure effect of the deep water of the circulating well so that the algae lose buoyancy to be easy to precipitate. A coagulant, the algae and other impurity grains collide in a reaction tank to be combined into larger floc grains so as to precipitate and be removed in a sedimentation basin. With the adoption of the method, the air bags of the algae are enabled to crack, the sedimentation speed is high and the removing effect is good; the algae cells are not damaged and water supply is safe; and the drug consumption and the energy consumption are low and the operation cost is low.

The invention discloses a method for comprehensively treating saline and alkaline land through combination of irrigation and planting. The method comprises the following steps: (a) paving underground pipelines, including micro-moisture pipes for irrigation and salt discharge underground pipes for discharging salt; (b) leveling and furrowing the saline and alkaline land for irrigation salt discharge, wherein the irrigation salt discharge includes underground salt discharge and surface salt discharge and specifically comprises the following three steps in sequence: I, performing underground salt discharge; II, performing surface salt discharge, and performing rapid large-area surface salt discharge on the saline and alkaline land subjected to the underground salt discharge through a flood irrigation way; III, repeating the underground salt discharge; (c) planting suaeda salsa on a large area, continuously performing micro-moisture irrigation salt discharge before and after seedling emergence of the suaeda salsa, performing micro-moisture irrigation intermittently after branching of the suaeda salsa till the end of the peak-growth period of the suaeda salsa, pulling up the suaeda salsa by the roots, and planting crops or continually planting the suaeda salsa according to the soil salinity to further reduce salinity.

A system for efficiently circulating water in a large volume of rearing space for aquatic organisms, comprising an impervious enclosure for containing the water and aquatic organisms and a pump for pumping water from an intake duct through intake ducting to a flow diverter, which then directs a flow of water radially outward within the enclosure to directly induce a circulation of water within the enclosure. The ‘center drive’ circulation pattern is sufficiently uniform to provide optimum rearing conditions for cultured finfish, while also ensuring that solid wastes are swept toward the central drain, even in a very large tank.

The invention discloses a road cement concrete flowing water washout tester and a use method thereof. The road cement concrete flowing water washout tester comprises a motor, a speed adjuster and a base, wherein a washout cylinder is arranged on the base; a concrete test piece is arranged at the bottom inside the washout cylinder; a washout plate component is arranged on the top of the concrete test piece; the output shaft of the motor is connected with a piston through the speed adjuster; the piston comprises a pull rod and a pressure plate connected with the pull rod; the cavity between the washout plate component and the top of the washout cylinder is divided into a cavity A and a cavity B by the pressure plate; a flowing water circulation pipeline is arranged on one side of a washout bucket; the water inlet of the flowing water circulation pipeline is communicated with the cavity B; the water outlet of the flowing water circulation pipeline is communicated with the cavity A. Due to the hollow structure, the shapes of patterns of a tire can be actually simulated, so that the washout plate has the load effect on the concrete test piece, and the load effect of the tire to a pavement structure can be simulated. The road cement concrete flowing water washout tester is simple in structure, convenient to use, and capable of simulating the washout testing on the bottom and the top of a concrete pavement plate.

The invention discloses an outdoor ecological greening wall which comprises a fixed frame, a plant module and a water supply system. The outdoor ecological greening wall is characterized in that a plurality of horizontal brackets are arranged on the fixed frame along the vertical direction; a horizontal clapboard is arranged on one of the horizontal brackets; the plant module is installed on the horizontal clapboard and comprises an open planting box, seeding matrix filled in the planting box, and a plant planted in the matrix; the opening of the planting box is covered by a plastic net and the outside part of the planting box is bound up by a rope-like piece; the water supply system comprises a pitched roof, a water collecting trough and a plurality of water supply pipes; the pitched roof is arranged at the top of the fixed frame and tilts downwards; the water collecting trough is located below the pitched roof; the openings of the water supply pipes are arranged in the water collecting trough; each water supply pipe is provided with a plurality of openings along the entire length direction; and the water supply pipes are threaded and inserted in the planting box. Meanwhile, the invention provides an installation method of the outdoor ecological greening wall. The outdoor ecological greening wall has the advantages of low burden, good greening effect and low cost.

The invention relates to a device for simulating soil groundwater oxygen content gradient distribution under a hydrostatic condition and can provide a simulated environment for related experiments and projects of researching pollutant transportation, reaction and control in different oxygen content conditions caused by groundwater body layering. The device comprises a rainfall device, a test earth pillar and an anaerobic water supply device, wherein the rainfall device comprises a water tank, a water inlet pump, a flow valve, a shower head and a connection pipeline, and the flow valve can be adjusted to control rainfall intensity; the test earth pillar comprises a plurality of detachable assembled assemblies of the same specification, each assembly is formed by assembling two half-cylinder tubes, the inside of the assembly is dull polished, and a series of holes are formed in the lateral edge to be connected with a sampling device; the anaerobic water supply device comprises an improved Mariotte bottle, a connection pipe with a valve and a connection disk with a permeable stone inner core. When the device is utilized, the transportation and reaction situation of pollutant in an aerobic, anaerobic and oxygen-deficient environment generated by an uneven water-gas distribution condition of an unsaturated-saturated zone can be taken into consideration and researched. Meanwhile, the device is suitable for simulation experiments of different lengths by assembling and disassembling different amount of models, so that the using rate of the models is improved, and cost is reduced.

The invention relates to an enhanced denitriding and dephosphorizing bioretention pond applied to construction of a sponge city. The enhanced denitriding and dephosphorizing bioretention pond is characterized in that existing low-lying plots in a city are utilized to construct the bioretention pond; overland runoffs generated nearby are gathered in the bioretention pond for accumulating and are subjected to purification treatment by pipelines, artificial water catchment channels or natural terrains; treated rainwater is used for recycled water of urban afforestation or supplemented groundwater or is directly discharged to a near water area; the bioretention pond comprises three parts: a prepositive primary settling area, a filtering area and a purified water reaction area, wherein the three parts are sequentially communicated. The enhanced denitriding and dephosphorizing bioretention pond has the advantages that multiple technologies of seepage, retention, storage, purification, use and discharge are integrated; the key point is that an enhancing effect is realized in a water purifying function, and the quality of effluent is stable; the whole project is simple in structure, convenient to construct and low in construction cost.

The invention relates to a hazardous chemical leakage monitoring and emergency treatment system for a sensitive water body bridge section. The system mainly comprises a hazardous chemical leakage emergency monitoring system, a bridge surface runoff collection system, a hazardous chemical emergency storage system and a bridge surface runoff treatment system. When a traffic accident does not happenon the bridge section, bridge surface runoff initial rainwater enters a collection pipeline system, and directly flows into the bridge surface runoff treatment system for purification treatment afterpassing through a runoff electric butterfly valve switch of an emergency regulating pondage, and 30 minutes later, the bridge surface runoff is directly discharged through an overflow port of the emergency regulating pondage. When the traffic accident happens on the bridge section, firstly, the traffic accident is discovered through a bridgehead monitoring camera and an alarm telephone, and whether hazardous material leakage exists is determined; secondly, an emergency control system is started by a monitoring center, and the emergency electric butterfly valve switch in the runoff regulating pondage is turned on; and finally, the leaked hazardous material and a diluent thereof enter the regulating pondage through a collection pipeline and then directly flow into an emergency storage pool.

The invention discloses a municipal road structure and a construction method thereof. The municipal road structure includes a road body, the road body includes a roadbed layer, a gravel layer, a coarse sand layer and a permeable concrete layer which are successively laid from bottom to top, the permeable concrete layer includes a roadway, two drains arranged on both sides of the roadway and two sidewalks arranged on both sides of the two drains, the road body is internally embedded with a plurality of reservoirs, the reservoirs communicate with urban sewer lines buried in the roadbed layer, water leading pipes allowing the reservoirs and the drains to communicate are arranged between the reservoirs and the drains correspondingly, and the reservoirs are internally provided with control mechanisms for controlling communication or partition between the reservoirs and the urban sewer lines correspondingly. According to key points of the technical scheme, rainwater can not only be diffused downwards and discharged through the structure of the road body, but also be discharged through drainage structures such as the drains, the water leading pipes, the reservoirs and the urban sewer lines, the drainage performance is good, and accumulated water is not prone to forming on the road surface.

The invention discloses a pds zero-gradient protection siphonal water draining and collecting system. The pds zero-gradient protection siphonal water draining and collecting system comprises a macromolecular protection drainage specially-shaped plate, a siphonal drainage groove, a variable-diameter pipeline, an observation well and a water collecting well, wherein the macromolecular protection drainage specially-shaped plate and the siphonal drainage groove are paved on a roof structure, geotechnical cloth is further arranged on the macromolecular protection drainage specially-shaped plate and the siphonal drainage groove, the top of the siphonal drainage groove is connected with a breathable observation pipe, the siphonal drainage groove communicates with the observation well through the variable-diameter pipeline, the observation well communicates with the water collecting well through a pipeline, and the upper part of the water collecting well is also connected with a water collection breathable observation pipe. The water draining system does not require gradient positioning or water blockage treatment. By adopting siphonal principles, original passive drainage is changed into active drainage, so that the problems, such as non-thorough water drainage, water leakage and vegetation damage, of the existing drainage structure are effectively solved. Cost and construction period can be reduced, building service life is effectively prolonged, and collected water can be repeatedly utilized.