83results about How to "Does not affect flood discharge" patented technology

The invention discloses a method for managing town black and olid river pollution in situ by utilizing biological repair technology, which takes the steps and measures of aerating and oxygenizing in riverway, adding a complex microbial agent, biologically repairing bottom sediment, arranging a bio-nest system and the like, so as to control and eliminate the exogenous and endogenous pollution of the river, purify the water quality of the river, improve the self-purification ability of the water body and achieve the purpose of eliminating black and olid. The method does not need to build structures in the riverway or lead the river water out of the riverway to be treated, or dredge the bottom sediment in the river, therefore the method is generally applicable to incomplete sewage interception and dredging or the rivers which can not be intercepted sewage or dredged temporarily, and the in situ treatment to the riverway which is affected by tide and has complicated fluid variation. Therefore, the method which can lead the water body to recover normal ecological function provides the practical, economic and convenient treatment method for various town black and olid rivers.

The invention relates to an in-situ biological-ecological recovery integrated system for an urban river water body. The in-situ biological-ecological recovery integrated system is capable of effectively preventing the problems of unqualified fluvial cross section water body and aquatic ecosystem damage and further improving the landscape effect. According to the technical scheme adopted by the invention, the method is as follows: close-to-nature riverside buffer zones are constructed on side banks of a river reach from upstream to downstream; the river reach, at which the close-to-nature riverside buffer zones are positioned, is internally and sequentially provided with a pretreatment unit, a first ecological floating bed unit, a first ecological filtration dam unit, an aquatic plant unit, a second ecological floating bed unit, a second ecological filtration dam unit, a biomembrane-enhanced purification unit including a plug-flow aeration unit, a habitat improvement unit and an aquatic organism functional group construction zone from upstream to downstream. The in-situ biological-ecological recovery integrated system does not need to occupy land area except for a riverway, is stable in treatment effect, does not influence drawing off of floodwater in the riverway, can be used for solving the problems of unqualified fluvial cross section water body and aquatic ecosystem damage and improving the landscape effect, and has great economical and social benefits.

The invention discloses a composite unit for restoration of a landscape water body. The composite unit at least comprises a water quality regulating zone, a filtration and sewage interception zone, an emergent aquatic plant arranging zone, a waterfall reoxygenation zone, an artificial floating island arranging zone, a base and a connecting pipe, wherein the water quality regulating zone is fixed on the filtration and sewage interception zone in an embedded mode, the middle of the emergent aquatic plant arranging zone is provided with a diversion table, the upper part of the diversion table is used for supporting the filtration and sewage interception zone, the filtration and sewage interception zone, the diversion table, the waterfall reoxygenation zone, the artificial floating island arranging zone and the base are respectively provided with a first center hole, a second center hole, a third center hole, a fourth center hole and a fifth center hole, and the connecting pipe passes through the first center hole, the second center hole, the third center hole, the fourth center hole and the fifth center hole to allow the filtration and sewage interception zone, the emergent aquatic plant arranging zone, the waterfall reoxygenation zone, the artificial floating island arranging zone and the base to be fixedly connected from top to bottom. The composite unit has the advantages of high water purification efficiency, no generation of secondary pollution, simple and convenient construction and maintenance, low investment cost and a small occupied water area.

The invention discloses an ecological purifying device of urban effluent, which comprises the following parts: biological earthworm reactor, biological rack, hydraulic aerating distributor, biological water-wheel type rotary disc, ecological purifying functional area and aeration filter purifying system, wherein the hydraulic aerating distributor connects biological earthworm reactor through overflow distributing board, which interconnects emergent aquatic plant area of ecological purifying functional area; the biological water-wheel type rotary disc is set in the outlet channel of biological earthworm reactor.

A purifying method for river micro-pollution water body by bionic plant achieves low cost and simple process. It adopts stem, node and leaf of bionic material to produce bionic plant, they are arranged in river for purifying water body. The bottom of bionic plant is fixed on riverbed, the filling silk with rough surface adheres microbe to form biological membrane. It improves micro-pollution water body treating and purifying effect.

The invention relates to a waterflow energy generator. Rails provided with slide blocks are arranged on two upright posts. The slide blocks can move along the rails up and down. A water wheel is arranged on the slide blocks, is provided with an energy-collecting flow guide plate connected with the slide blocks through a connecting rod and is connected with a generator through a driving mechanism. The invention adopts a water turbine, the water wheel can float on the water surface along with the water level, and the water turbine can rotate by the kinetic energy and the potential energy of the water, so the generator is driven to generate electricity, the height of the water turbine is automatically lifted according to the change of the water level of the river, the stability of the generator is increased, the flood discharge and the flood drainage are not affected, and the water blockage dam does not need to be constructed. The waterflow energy generator can be arranged on the watercourses of rivers and branches, arranged along the watercourse at intervals, and can be also arranged on the high-speed waterflow outlet position of the barrage hydropower stations.

The invention discloses a simulative nature river course water purification system. A river section is based on the trapezoidal compound section, multiple segments of filler purification regions are arranged at two sides in a main channel in a staggered manner so as to form sub-channels meandering on a plane, and the height of the filler purification region is higher than the low water level of the river; the filler purification region is filled with ripraps, broken stones and surface fillers from the bottom to the top; and a riprap banket is arranged between each two segments of filler purification regions. The simulative nature river course water purification system provides diversified habitat environments while strengthening the self cleaning capacity of the river and improving the river water environment quality, and plays an active role in repairing the biological diversity recovery of the stream segment. The simulative nature river course water purification system has the following remarkable advantages that the system operates in a passive unpowered manner, can improve the flow state, has no influence on the flood discharge of the main stream in the flood season, and has the advantages in multiple aspects, such as excellent water purification and ecological restoration effect and so on, especially, the system is suitable for the small rivers with low sediment amount and low flow velocity, or the scenic rivers.

The invention discloses a device and a method for regulating and controlling ecological water requirement in dry seasons of a riverway bankside zone under a dam. The device comprises an architecture device, a height adjustment device, a charge / discharge device, a pendulous device and a central control device. The invention also provides a method for regulating and controlling the ecological water requirement in dry seasons of the riverway bankside zone under the dam by using the device. The device is capable of running independently or running according to dispatching in combination with an upstream reservoir; the device does not increase, and even reduces the discharged volume under the dam in the dry seasons while meeting the basic requirements such as normal floodwater draw-off, shipping and upstream reservoir water supply, and therefore, effective regulation and control on the ecological water requirement of the bankside zone near the device can be realized; the water level of the riverway bankside zone under the dam can be remarkably banked up, and also the water level pulse amplitude of different areas can be flexibly controlled; and therefore, the assurance rate of the ecological water requirement in the dry seasons of the riverway bankside zone under the dam is achieved, and the uneven seasonal distribution problem of the water volume and the contradiction between the water conservancy project construction and the downstream ecological water requirement are solved.

The invention belongs to the field of water treatment, and specifically relates to a rainwater filtering device. The rainwater filtering device is characterized by comprising a filtering frame, filtering nets, a filtering material and a flow guiding device, wherein the filtering frame comprises a top, a side part and a bottom; the filtering nets are arranged at the bottom and the side surface of the filtering frame; the filtering material is arranged at the bottom of the filtering frame; the flow guiding device is mounted in the filtering frame. With the adoption of the rainwater filtering device, rainwater can be subjected to multi-grade treatment from the source, and pollutants such as granules, floating objects, nitrogen, phosphorus, oil and grease in rainwater can be separated; the intercepting effect is good; the pollution caused by that pollutants in rainwater is directly discharged to pollute natural water can be avoided.

The invention discloses a riverbed non-dam type hydroelectric generation system, and relates to a hydroelectric generation system. The riverbed non-dam type hydroelectric generation system is used for solving the problems that an existing traditional hydropower station is high in manufacturing cost and large in work amount, a floating boat-type non-dam hydropower station can only be implemented in great rivers, the utilization rate of hydropower resources is relatively limited, and a tidal power station is high in construction cost, and cannot be utilized in a large-scale mode. The riverbed non-dam type hydroelectric generation system comprises a water turbine, a flow guiding body, a flow guiding plate, two right-angled-n-shaped frames, two bearing platforms, two power generation platforms, two generators, two increasing gear trains and two lifting mechanisms, wherein one bearing platform, one power generation platform, one generator, one increasing gear train and one lifting mechanism are installed on each right-angled-n-shaped frame, the water turbine comprises a rotary shaft and a plurality of bent blades, each power generation platform which is connected with the corresponding bearing platform is installed above the corresponding bearing platform, each generator is installed on the corresponding power generation platform, motors are connected with worm wheels respectively, and threaded rods are connected with the power generation platforms respectively. The riverbed non-dam type hydroelectric generation system is used for carrying out hydroelectric generation.

The invention relates to the technical field of environment protection, in particular to a biology floating island capable of automatically rising and falling. The island comprises a floating island body, an inside-water stand column, a shoreside rope fixing pile, a pulley, a bidirectional motor, at least one fixing end steel wire rope, a shoreside stand column and at least one traction end steel wire rope. The floating island body is provided with a frame structure. One end of each fixing end steel wire rope is fixed to the top end of the inside-water stand column, and the other end of each fixing end steel wire rope is connected with the frame structure. One end of each traction end steel wire rope is connected with the frame structure, and the other end of each traction end steel wire rope is fixed to the fixing pile or connected with the bidirectional motor. The pulley is arranged at the top end of the shoreside stand column. The position of the biology floating island in a river channel water body is controlled by the bidirectional motor and the steel wire ropes; the bidirectional motor is used in the adjusting process of the biology floating island, labor is saved, and the island is convenient to operate and easy to obtain. In addition, the biology floating island is scientific in structural setting, stable in force bearing of each layer, and capable of normally working, rising and falling under the severe weather conditions.

The invention relates to an energy accumulation type waterpower water-raising and irrigation device. The device can convert water flow energy of a river in a bottomed land into air pressure energy and release the air pressure energy to an air pressure water raiser at a constant pressure after energy accumulation; and the air pressure water raiser raises water to directly drive water-saving irrigation systems of drop irrigation, spray irrigation and the like. Compared with a non-energy accumulation type waterpower water-raising device, the energy accumulation type waterpower water-raising and irrigation device has large water supply flow and constant pressure, so the water-saving irrigation systems of drop irrigation, spray irrigation and the like, which have a specific requirement on the water supply flow and the pressure, can be directly driven, and the troubles of building of an impounding reservoir and secondary pressurization can be avoided; damming buildings are not needed to be constructed on a river channel, and the basic function of the river channel such as flood discharge and the like cannot be affected; and the energy accumulation type waterpower water-raising and irrigation device has high automation degree and is low in the threshold of mass production of irrigation equipment factories and unmanned, and a plurality of universal members are adopted.

The invention relates to a method for treating black and smelly rivers by electrochemistry combined with biological ecology. The method is characterized in that an electrochemical treatment device, abiological contact oxidation system, aeration systems, a microbial agent, a sediment biological agent, biological grids and an artificial floating island are included. A biological contact oxidationpool is formed at the cofferdam at the front end of a to-be-treated river, electrochemical treatment is conducted in the river simultaneously, the river is segmented, and the aeration systems are arranged for aerobic aeration treatment; electrochemical treatment is ended before the microbial agent is spread, and aerobic aeration treatment is maintained; the sediment biological agent is spread forsediment oxidation remediation treatment, and aerobic aeration treatment is maintained; the biological grids capable of adsorbing microorganisms and plankton are arranged in the middle of the river atcertain intervals to allow the microorganisms and the plankton to reproduce; the artificial floating island is arranged in the middle of the river, and emergent aquatic plants are planted on the artificial floating island to restore the natural self-purification ability of the to-be-treated river.

The invention discloses an integrated device for ecological purification of domestic wastewater of a small scattered river suspended sewage outlet. The integrated device comprises a sewage outlet wastewater collector, an up-flow precipitation sand filtration tank, a three-section ecological purification cage and a solar aerating system, wherein the three-section ecological purification cage comprises an anaerobic treatment bag, a solar driving contact oxidation bag and a deep adsorption sewage removing water discharger which are connected with one another from end to end. The device is used for collecting the wastewater of the wastewater outlet by using the wastewater collector; the wastewater flows through the up-flow precipitation sand filtration tank and then enters the three-section ecological purification cage; the three-section ecological purification cage is formed by processing and assembling a waterproof cylinder and a plastic flange; the wastewater is finally discharged into the river by virtue of a water outlet; meanwhile, the three-section ecological purification cage is fixed on the inner side of the river bank by an anchor rod; a falling-off biological film generated by the device can be artificially cleaned; the device is novel and simple in structure, convenient to maintain, free of extra energy consumption, excellent river landscape effect, free of influence on the flood control safety and high in values of application and popularization.

The invention discloses an adjustable flexible cut-off device which comprises a shell and a rubber sleeve. A circulating channel penetrating axis of the rubber sleeve is arranged in the rubber sleeve,the shell is arranged out of the rubber sleeve in a sleeving manner, a rubber liner comprises a deformable part and a non-deformable part, an inflatable cavity is formed between the inner wall of theshell and the outer wall of the rubber sleeve, an access hole is formed in the shell, and the access hole communicates to the inflatable cavity; when the inflatable cavity is filled with a medium, the deformable part of the rubber sleeve deforms toward the side of the non-deformable part, and the circulating channel becomes small till being cut off. In the cut-off state of the circulating channel, the inner wall of the deformable part of the rubber sleeve is tightly attached to the inner wall of the non-deformable part. The adjustable flexible cut-off device can control the cut-off height, and is simple in structure and wide in application range.

The invention relates to a road rainwater processing system, in particular to a rainstorm overflow well with a rainwater seepage function. The rainstorm overflow well comprises an overflow well body with the open upper end and the closed lower end. The upper opening of the overflow well body is provided with a pollutant intercepting basket. The middle of the overflow well body is provided with a water drainage outlet which is communicated with a rainwater branch pipe used for draining water. The side wall of the portion, below the water drainage outlet, of the overflow well body is provided with a plurality of water drainage holes. The outer sides of the water drainage holes are wrapped by an inner layer permeable geotextile. The bottom end of the overflow well body is provided with a plurality of water drainage grooves. Capillary permeable drainage belts are fixed to the water drainage grooves. Cobblestones are arranged outside the bottom and the lower portion of the overflow well body and wrapped by an outer layer permeable geotextile. The rainstorm overflow well has the advantages that the rainwater seepage function is strong, the seepage speed is high, and water seepage is not affected even sludge exists in the well.

The invention discloses a water flow generator set. The water flow generator set comprises a first impeller set, a second impeller set, an outer rotor, an inner rotor, a stator and a supporting shaft, wherein the stator is located between the outer rotor and the inner rotor, the supporting shaft is located in the inner rotor, the first impeller set comprises a first installation ring with a first through hole, the first installation ring is evenly provided with at least six first blades in the circumferential direction, the outer rotor, the stator and the inner rotor are sequentially arranged on the circumference of the supporting shaft in a sleeved mode and allow gaps to be formed between the middles of themselves, the supporting shaft comprises a central part and locating parts located at the two ends of the central part, and the inner rotor comprises a central inner rotor part and an inner rotor end part located at one end of the central inner rotor part; two end covers of the inner rotor are arranged to the locating parts at the two ends of the supporting shaft through first bearings, and the first installation ring and the second installation ring are arranged in the inner rotor end part of the inner rotor. According to the water flow generator set, under the lower water flow speed, rotating power is obtained for high-efficiency electric generation, carrying convenience is achieved, the water flow generator set can be arranged on river channels of large rivers and tributaries, and universality is good.

The invention discloses a flow control method for a diversion shaft. A predetermined flow value is set, a flow value of a second water outlet pipe is measured as a real-time measured value, and the real-time measured value is compared with the predetermined flow value. When the real-time measured value is greater than the predetermined flow value, a controller issues a control signal to drive a control valve to actuate a pneumatic shut-off device to inflate, the second water outlet pipe tends to be closed until the measured value is equal to the predetermined flow value, and then the pneumaticshut-off device stops inflation. When the real-time measured value is smaller than the predetermined flow value, the controller issues a control signal to drive the control valve to actuate the pneumatic shut-off device to deflate, the second water outlet pipe tends to be opened until the measured value is equal to the predetermined flow value, and then the pneumatic shut-off device stops deflation.

A water resource storage and comprehensive utilization system includes a water discharging gate, an artificial lake, a power generating set, a viaduct bridge, an aqueduct, a water feeding gate, deep water channels, a diversion canal, and a water raising dam; the aqueduct is laid on the viaduct bridge, river water on an upstream of a river is guided to a downstream certain position to form the artificial lake, and water storage, power generating and water cleaning can be achieved; the deep water channels are dug in a bed of the river and the artificial lake, and in this way, the water storage amount is increased, land occupation can be avoided, and river flood discharge cannot be affected. The artificial lake can be dug in places which are near cities or flat areas, do not have a lake forming condition, are high in terrain, and cannot allow rivers to flow, the artificial lake can receive water from the river channel and processed and discharged city sewage, the wetland environment of the artificial lake can clean the water, and power generating can be achieved. The water resource storage and comprehensive utilization system is simple, cheap and effective, can solve the problem of water shortage of cities or north areas to the greatest extent, and has a certain advantage in comparison with the South-to-North water diversion project and a sea water desalination project.

The invention discloses a submerging type ecological water cube system used for black and stink water body pollution treatment, ecological restoration, and water quality improvement in rivers, lakes,reservoirs, river mouths, and gulfs. The submerging type ecological water cube system comprises submerged plants, a net-shaped framework, submerged plant plantation interfaces, a biological filling material inoculated with microbes, and light sources; the submerged plants grow on system upper surface and peripheral side surfaces respectively, so that full utilization of the three-dimensional spaceof the water body is realized, and the contact effect area of plants with water body is enlarged; the external light sources are used for supplement of deficiency of natural illumination; the biological filling material is inoculated with a microbial agent to realize adsorption, conversion, and degradation of pollutants with microbes, promote water plant photosynthesis and adsorption effect on nitrogen and phosphor eutrophication salts, eliminate water body black color and stink smell, establish a water body ecological system, and recovery and improve water body self cleaning capacity.

The invention discloses an intelligent control system for enabling a river channel water quality monitoring section to reach the standard and a method thereof. The control system comprises a main river channel (1), a bypass purification system (2) and an intelligent control system (3). An automatic monitoring station monitors the water quality of a monitoring section in a river channel and transmits the data to the intelligent control system; the intelligent control system is connected to the bypass purification system; the intelligent control system controls the bypass purification system toopen according to the detection result; after part of river channel water is introduced to the bypass purification system, then the water is converged with the river channel discharge water through awater outlet gate to enter the monitoring section to form a monitoring loop. According to the intelligent control system for enabling the river channel water quality monitoring section to reach the standard and the method thereof, through the intelligent control, the bypass purification system is scientifically, accurately and timely optimized and dispatched according to local conditions to purifythe water quality and water yield of the river channel so as to guarantee that the river channel water quality monitoring section is stable and reaches the standard.

The present invention discloses a gantry crane integrated dam in the field of hydraulic engineering facilities. The gantry crane integrated dam comprises a door mounted between lock walls. Side rubberwater seals are mounted on both left and right sides of the door to form seal structures with the lock walls, thereby preventing water leakage on both sides. A bottom rubber water seal is mounted between the bottom of the door and a bottom sill to form a seal structure for preventing bottom water leakage. A plurality of supporting hinge bases are fixed to the bottom sill. The bottom of the door is hinged to the front ends of the supporting hinge bases by means of front pin shafts. A hydraulic oil cylinder is arranged on a land side of the door. One end of the hydraulic oil cylinder is hingedto a back surface of the door by means of an upper pin shaft, and the other end of the hydraulic oil cylinder is hinged to rear ends of the supporting hinge bases by means of rear pin shafts. The device is low in cost, simple to control and convenient to manage, can be applied to a variety of river channels, especially to relatively wide river channels, and has extremely high cost performance.

The invention discloses a sewage treatment device for a river channel sewage outlet, which comprises a shell and a floating plate, the floating plate is placed on the upper part of the shell, and its edge extends out of the outer edge of the shell; The mud port is on the lower side of the water inlet; there is a cavity inside the shell, and the cavity is divided into three chambers by the first partition and the second partition, which are cement separation chamber, first filter chamber and The second filter chamber; the middle part of the cement separation chamber is provided with a filter layer, and the upper part of the cement separation chamber separated by the filter layer is filled with fillers, while the first filter chamber and the second filter chamber are filled with fillers; in the first compartment A filter is arranged between the plate and the floating plate, and a filter is also arranged between the second partition and the bottom plate of the casing. The sewage treatment device disclosed in the present invention adopts cement separation to improve the efficiency of sewage treatment; at the same time, it realizes on-site interception and degradation of pollutants in sewage, making the device a hydrophilic platform with the function of beautifying rivers.

The invention discloses a safety device for a crossing tower and an anchor tower of a power transmission line. The safety device comprises anticollision pier bodies and connecting crossbeams; a plurality of reinforced concrete pier bodies with independent foundations are arranged around the crossing tower and the anchor tower of the power transmission line, which are positioned in the flood land or riverway and is not protected by a dam; the top ends of the adjacent pier bodies are connected by the horizontal reinforced concrete connecting crossbeams arranged above the level of once-a-century flood to form the safety device with an integral frame structure; each pier body comprises an underground foundation buried underground and a pier body arranged on the earth surface; the cross section of each pier body is an kidney-shaped surface, and one narrower surface of each pier body faces to the water flowing direction; and the foundation of each pier is independent of the crossing tower and the anchor tower and keeps a certain safety distance from the crossing tower and the anchor tower. The safety device for the crossing tower and the anchor tower of the power transmission line has the advantages of strong safety function, simple structure, short building peroid, no influence to flood discharge in the flood peroid and the like.

The invention discloses a seepage-proofing step-deep pool system for repairing a water reducing and dehydrating river channel in a mountainous area. The whole seepage-proofing step-deep pool system isin a pitted shape, deep pools with seepage-proofing performance and steps with water retaining performance are arranged in the water reducing and dehydrating river channel in the mountainous area, the steps are formed by stacking stones of different sizes in a nested mode at the edges of the deep pools, the deep pools are composed of pit bottom sand pebble, supporting base small gravel, supporting base fine sand, seepage-proofing layers, mat layer coarse sand and surface sand pebble from bottom to top in sequence, and the depth of pool pits is 0.5-2m. According to the seepage-proofing step-deep pool system for repairing the water reducing and dehydrating river channel in the mountainous area, by constructing the step-deep pool system with seepage-proofing and water storage performance ona sandy pebble riverbed, a basic emergency shelter can be provided for fish and other aquatic organisms in the water reducing and dehydrating river channel in the mountainous area, and the ecologicalwater demand of the river channel is met. The seepage-proofing step-deep pool system is simple in design and easy to construct, the layout form and quantity are applied to local conditions without operating cost, and the seepage-proofing step-deep pool system is applied to ecological restoration of water reducing and dehydrating river channels of small hydropower stations in mountainous areas withabundant rainfall, and is further applied to ecological control of downstream river channels of dam (sluice) with low rainfall but certain discharge flow at regular intervals.

The invention discloses an online treatment system with a particle separation and sedimentation device. The online treatment system comprises an online treatment tank, wherein a particle separation and sedimentation device is arranged in the online treatment tank and comprises at least two baffle walls, the baffle walls are oppositely arranged at the bottom of the online treatment tank and extendtowards the upper end of the online treatment tank, and a support framework is arranged at the upper ends of the baffle walls; a filter screen is distributed on the support framework to form a semi-closed cavity facing towards one end of the water inlet pipe of the online treatment tank, the semi-closed cavity has an opening and is used for filtering and settling rainwater entering the online treatment tank. According to the online treatment system, the rainwater is pretreated by virtue of the combination of gravity settling and the filter screen, floating objects and greasy dirt in the rainwater are intercepted and are collected into the filter screen, particulate matters in the rainwater are blocked by virtue of the baffle walls and are settled at the bottom of a cavity between the baffles, and finally water flowing out from a water outlet pipe does not contain floating objects, is low in particle content and is relatively clean, so that the pollution of a water body is prevented.

The invention discloses a gate machine integrated dam in the field of hydraulic facilities, which includes a gate body installed between gate walls, and the left and right sides of the gate body form a sealing structure by installing side water-stop rubbers and gate walls to prevent side water leakage. A bottom water-stop rubber is installed between the bottom of the door body and the bottom sill to form a sealed structure to prevent water leakage at the bottom. Several hinge seats are fixed on the bottom sill; the bottom of the door body and the front end of the hinge seat are hinged through the front pin. A hydraulic cylinder is arranged on the back side of the body, one end of the hydraulic cylinder is hinged to the back of the door body through the upper pin, and the other end of the hydraulic cylinder is hinged to the rear end of the hinge seat through the rear pin. The device has the advantages of low cost, simple control and convenient management, can be used in various river courses, especially in wide river courses, and has high cost performance.

The invention discloses an anti-backward-flow method applied to a drainage port. The method comprises the steps that an in-well liquid meter and an out-wall liquid meter are used for transmitting collected in-well liquid level information H1 and out-well liquid meter liquid level information H2 to a controller, and the controller is used for controlling action of a control valve according to the relation between the in-well liquid level information H1 and the out-well liquid meter liquid level information H2; when the out-well liquid meter liquid level information H2 is larger than or equal tothe in-well liquid level information H1, an anti-backward-flow program is executed; the control valve operates, a first pneumatic cut-off device is subjected to air inflation, a first water outlet pipe is closed, and natural water connected with the first water outlet pipe or a fluid in a rainwater pipe is prevented from flowing backward into a drainage port well through the first water outlet pipe; when the out-well liquid meter liquid level information H2 is smaller than the in-well liquid level information H1, the anti-backward-flow program exits.

The invention discloses a small-scale decentralized integrated device for ecological purification of domestic sewage at a suspended sewage outlet of a river, which includes a sewage collector at the sewage outlet, an upflow sedimentation sand filter, a three-stage ecological purification cage and a solar aeration system; the three sections The ecological purification cage is composed of an anaerobic treatment bag, a solar-driven contact oxidation bag and a deep adsorption decontamination water outlet end-to-end; the device collects the waste water from the sewage outlet through the waste water collector, and enters the third section after flowing through the upflow sedimentation sand filter Type ecological purification cage, the three-stage ecological purification cage is composed of waterproof cylinder and plastic flange, and finally discharged into the river through the outlet; at the same time, the three-stage ecological purification cage is fixed on the inner side of the river bank by anchor rods, and the device The resulting exfoliated biofilm can be manually removed. The device has novel and simple structure, convenient maintenance, no additional energy consumption, good river landscape effect, and does not affect flood control safety, and has strong application and promotion value.

The invention discloses deep underwater transportation corridor structures and a construction method thereof and belongs to the technical field of underwater building structures. The deep underwater transportation corridor structures comprise a horizontal transportation corridor structure and a slope-shaped transportation corridor structure; a foundation of the horizontal transportation corridor structure is arranged on a riverbed, one end of the horizontal transportation corridor structure is connected with the slope-shaped transportation corridor structure, and the other end of the horizontal transportation corridor structure is connected with an underwater protective body; and a foundation of the slope-shaped transportation corridor structure is arranged on a dike slope and is supported by a pile foundation, one end of the slope-shaped transportation corridor structure is connected with the horizontal transportation corridor structure, and the other end of the slope-shaped transportation corridor structure is connected with a ground place. According to the deep underwater transportation corridor structures and the construction method thereof, the safe degree is high, the process is simple, the water-proof effect of the structures is good, the construction speed is quick, and the settlement volume is low.