58results about How to "Guaranteed water storage" patented technology

The household intelligent water saving apparatus to purify waste water for reuse includes casing, water tank inside the casing, water level sensor and water pump inside the water tank, water tap on the casing, basin and accumulator. The basin drain outlet is connected via filter, turbidity detector and solenoid valve to the water tank; the solenoid valve has the other end connected to the drain pipe; the drain pipe has overflow port to the water tank, solenoid valve and drain port; the water tank is connected to water tap via water pump; the storage button, the drain button and the turbidity detector control the solenoid valve; and the turbidity detector controls the solenoid valve to exhaust dirt water. The present invention has the advantages of saving water, reducing city sewage amount, simple structure, etc.

The invention discloses a floating type intelligent gate opening and closing device. The floating type intelligent gate opening and closing device is characterized by comprising two railways (2) which are arranged on the lower portion of a dam face (1), the railways (2) are provided with a gate (3), the middle of the top end of the gate (3) is connected with a gate opening rope (17), after the gate opening rope (17) sequentially penetrates through a first fixed pulley (4) which is arranged at the top end of the dam face (1) and the a moving pulley (5) which is arranged between the first fixed pulley (4) and the top ends of the railways (2), one end of the gate opening rope (17) is fixedly connected with a dam bottom (6), and after the other end of the gate opening rope (17) penetrates through a second fixed pulley (7) which is arranged at the dam bottom (6), the other end of the gate opening rope (17) is connected with a gate opening air bag (8). According to the floating type intelligent gate opening and closing device, the perspective of the innovative design is unique, the theory is simple, and the device is convenient to manufacture and use. The floating type intelligent gate opening and closing device is suitable for medium and small size guardless reservoirs in mountain areas, and also suitable for other hydraulic structures with gate opening and closing.

The invention discloses a method for remediating soil pesticide residues. The method comprises the following steps: 1) performing deep ploughing, deep scarification and straw turnover; 2) laying a layer of beta-cyclodextrin grafted fibers at the bottom of soil; 3) irrigating; 4) regulating the pH value to be 6.0-7.0, and adding microbes; and 5) intercropping, namely intercropping plants capable ofadsorbing pesticide residues and corn or soybeans in the soil treated in the step 4), so that the aims of absorbing the pesticide residues and increasing yield can be achieved. According to the method for remediating soil pesticide residues provided by the invention, physical, chemical and biodegradable manners are combined, so that the pesticide residues in the soil can be reduced, the soil structure is deeply improved, beneficial bacteria in the soil and dormant active organic matters are activated, and the soil vitality is wakened. The adopted remediation agent is mild, and the original equilibrium system of the soil is not damaged.

The invention discloses a lifting gate for water retaining during rising of the water level in a reservoir. The lifting gate comprises a reservoir base; a main power pump is fixedly arranged in the reservoir base; the main power pump is in power connection with a power rod; a lifting gate body is fixedly arranged on the upper side of the power rod; a gate cavity is formed in the reservoir base; the lifting gate body slides in the gate cavity; a gate sealing plate is fixedly arranged on the upper side face of the reservoir base; the lifting gate body slides in the gate sealing plate; a lifting cavity is formed in the left side of the lifting gate body; a water inlet groove is formed in the right side of the lifting gate body; and a starting device for starting the lifting gate is arranged in the water inlet groove. According to the lifting gate, ascending of a baffle can be automatically realized according to the water level in the reservoir, so that water overflow is prevented, and automatic drainage can be achieved when the water level exceeds the height of the reservoir; and lifting water retaining can be achieved again in the lifting process of an existing gate, so that a water source is further stored, and the water storage capacity and the reservoir safety of the reservoir are guaranteed.

The invention discloses a method for calculating theoretical inflow of a secondary water supply tank. The method comprises the following steps of: 1, dividing one day of a workday or a rest day into aplurality of time periods according to the water consumption condition of the water tank on the workday or the rest day; 2, calculating the average effluent amount and the maximum effluent amount ofthe water tank in different time periods within one day of a workday or a rest day; 3, calculating the theoretical remaining water amount of the water tank at the starting moment of different time periods in one day of a workday or a rest day; and 4, calculating the theoretical inflow water amount of the water tank in different time periods of the workday or the rest day according to the theoretical retention water amount, the real-time retention water amount and the maximum water storage amount of the water tank at the beginning of each time period of the workday or the rest day. According tothe invention, the retention time of tap water in the water tank can be accurately controlled on the premise of meeting the water use requirement, and the risk that microbial indexes exceed the standard due to the fact that the retention time of tap water in the water tank is too long is effectively reduced.

The invention discloses a method for water-saving topdressing of winter wheat in a drought region by foliar fertilization replacing root fertilization. The method is characterized in that in the whole winter wheat growth cycle, urea is applied according to a ratio of 30-37.5kg / 667m<2>, a use ratio of a base fertilizer is 80% and a use ratio of the fertilizer for foliar fertilization replacing root fertilization is 20%; and the method for topdressing by foliar fertilization replacing root fertilization comprises the following steps of applying the base fertilizer to a winter wheat field according to a ratio of 24-30.5kg / 667m<2> by one step in a period from October 2 to 7 every year, and carrying out urea topdressing by foliar fertilization replacing root fertilization according to a ratio of 6-7.5kg / 667m<2> respectively in green-turning, jointing and booting three stages, wherein in each process, urea is applied according to a ratio of 2-2.5kg / 667m<2>, a urea solution is used according to a ratio of 50kg / 667m<2>, and after four o'clock in the afternoon, the fertilizer solution is sprayed on leaf surfaces by a mist sprayer so that foliar fertilization replacing root fertilization is realized. The method for water-saving topdressing by foliar fertilization replacing root fertilization realizes normal topdressing of winter wheat in drought, saves water, labor and fertilizer, and realizes fertilizer direct absorption by leaves thereby improving a fertilizer utilization rate and a fertilizer action rate.

The invention discloses a waste tire breaker convenient to clean. The waste tire breaker comprises a box body, a breaking roller arranged in the box body and a sieve plate arranged below the breakingroller; a feed inlet is formed in the top of the box body; a feed pipe matched with the feed inlet is arranged at the top of the box body; a material receiving plate penetrates through the box body and arranged below the sieve plate; a spraying device is arranged in the box body and arranged below the sieve plate; a water reservoir is arranged at the bottom of the box body and matched with the spraying device; and a cleaning assembly is arranged in the water reservoir. After being sprayed on the sieve plate, a water flow sprayed by the spraying device falls back into the water reservoir underthe action of gravity, and brings dust and other impurities on the sieve plate into the water reservoir together, and sludge at the bottom of the water reservoir is scraped off under the action of thecleaning assembly, so that the bottom of the water reservoir is prevented from being lifted by the sludge, the water storage capacity of the water reservoir is maintained, and the influence of the sludge on the spraying device is avoided.

The invention discloses a combined water supply method for secondary water supply high-level water tanks and low-level water tanks. The combined water supply method comprises the steps: 1, calculating the theoretical remaining water amount of each high-level water tank at the starting moment of different time periods of one day of a workday or a rest day; 2, calculating the theoretical inflow water quantity of each high-level water tank in different time periods of the workday or the rest day at the starting time of different time periods of the workday or the rest day, and controlling water supply to each high-level water tank according to the theoretical inflow water quantity; 3, calculating the outflow water amount of the low-level water tank and the theoretical remaining water amount of the low-level water tank at the starting moment of different time periods of one day of a workday or a rest day; and 4, calculating the theoretical inflow water quantity of the low-level water tank in different time periods of the workday or the rest day at the starting time of different time periods of the workday or the rest day, and controlling water supply to the low-level water tank according to the theoretical inflow water quantity. The risk that microbial indexes exceed the standard due to the fact that tap water stays in the water tank for a long time can be effectively reduced.

The invention discloses a tunnel fire-fighting system with valley intermountain water being a water source. The tunnel fire-fighting system comprises a pressure sensor, a wireless alarm device, a drainage ditch, an overflow dam, a sand and gravel trap, a low-level water pool, a pump room, a high-level water pool and a tunnel fire hydrant. The overflow dam, the sand and gravel trap, the low-level water pool, the pump room, the high-level water pool and the tunnel fire hydrant are built nearby a tunnel. Through using the intermountain water as the water source, it can be ensured that stored water in a reservoir is sufficient, and the cost is lowered; the overflow dam is arranged inside the drainage ditch for storing water, so that the intermountain water is conveniently led into the sand and gravel trap. Through arranging the low-level water pool, the pump room and the high-level water pool, water pressure can be automatically provided for the fire hydrant of the tunnel. The pressure sensor is arranged for detecting the amount of sand and gravel in the sand and gravel trap. When the amount of the sand and gravel is excessively large, a wireless alarm signal is transmitted to a control center of the tunnel fire-fighting system so as to remind workers of clearing away the sand and gravel in the sand and gravel trap. In this way, it is avoided that because the amount of the sand and gravel in the sand and gravel trap is excessively large, a pipeline communicated with the low-level water pool is blocked, the low-level water pool can not store water, and no water can be provided for tunnel fire fighting.

The invention discloses a water supply method for a secondary water supply tank of a newly-built building, which comprises the following steps of: 1, dividing the water tank into two water chambers, and selecting one water chamber as a used water tank; 2, calculating the average effluent quantity and the maximum effluent quantity of the used water tank in different time periods of one day of a workday or a rest day; 3, calculating the theoretical remaining water amount of the used water tank at the starting moment of different time periods of one day of a workday or a rest day; 4, calculating the theoretical inflow of the water tank in different time periods of the workday or the rest day at the start time of the different time periods of the workday or the rest day; 5, sending a closing or opening control signal instruction to the water supply control equipment, and circularly finishing the water supply of one day according to the instruction; and 6, calculating the volume ratio of the used water tank, and determining whether the used water tank needs to be changed or not according to the volume ratio. On the premise of meeting the water use requirement, the risk that the microbial index exceeds the standard due to the fact that tap water stays in the water tank for a long time can be effectively reduced.

The invention discloses a drainage pipeline system with a ventilation device. The drainage pipeline system comprises a reserve mining block and a water pump water absorption tube, a stoping mining block is arranged on one side of the reserve mining block, a mining tunnel is arranged around the reserve mining block, one side, away from the reserve mining block, of the stoping mining block is provided with a drainage pipeline, a ventilating duct is arranged above the stoping mining block, the drainage pipeline is arranged above both the stoping mining block and the reserve mining block, a watersump is arranged below the stoping mining block, a water sump water inlet pipe is arranged on the front surface of the water sump, a liquid level detector is arranged on one side of the interior of the water sump, and a water sump protective screening is arranged close to a position above the liquid level detector inside the water sump. Workers passing the periphery of the water sump can be conveniently protected by the water sump protective screening, the problem of safety accidents caused by too deep water of the water sump is avoided, meanwhile, ore falling into water can be conveniently cleared, and the problems that stones falling into the water are difficult to clear and influence the water storage of the water sump are avoided.

The invention discloses a planting box of a roof garden. The planting box comprises a box body which is internally provided with a planting substrate layer, a filtering layer and a waterproof layer; wherein the planting substrate layer, the filtering layer and the waterproof layer are successively arranged from top to bottom. The planting box further comprises a water storage layer which is arranged between the filtering layer and the waterproof layer. Furthermore a separation network is arranged between the water storage layer and the filtering layer. The separation network is fixedly arranged on the sidewall of the box body. According to the planting box of the roof garden, through arranging the water storage layer between the filtering layer and the waterproof layer, and performing water absorption and water discharging through a sponge, high convenience in watering the planting box is realized. When a relatively large amount of water is applied, the water is absorbed by the sponge, thereby preventing water accumulation in the planting substrate layer; and when water shortage occurs in the planting substrate layer, the sponge performs water discharging contrarily, and the water content of the planting substrate layer is ensured, thereby keeping water balance in the planting box and realizing good water content of the plant.

The invention provides a washing barrel assembly and a washing machine. The washing barrel assembly comprises a washing barrel and a supporting frame; the washing barrel is rotatably arranged and comprises a rotary drum and a rear cover; the rotary drum is connected with the rear cover; the rear cover is provided with a water outlet, and the water outlet is located at the central position of the rear cover; the supporting frame is connected with the rear cover; a flow channel is defined by the supporting frame and the rear cover; a water inlet is formed in the flow channel; the flow channel iscommunicated with the water inlet and the water outlet; and the supporting frame is configured to rotate and drive the washing barrel and the flow channel to rotate along with the supporting frame, so that the water inlet scoops water in the washing barrel and / or outside the washing barrel into the flow channel, and water in the flow channel is discharged into the washing barrel through the wateroutlet. According to the washing barrel assembly, the supporting frame is used for driving the washing barrel to rotate and driving water to spray clothes, so that the product composition is simplified, meanwhile, the power consumption cost is reduced, energy conservation and emission reduction are achieved; and the water outlet is formed in the rear cover, so that the water is directly sprayed into the washing barrel along the water outlet, spraying is more efficient, and the spraying visual effect is better.

The invention discloses a semi-partitioned roof greening cultivation tank. The semi-partitioned roof greening cultivation tank comprises a tank body, a filter layer, water drainage outlets, water storage troughs and water absorption strips. A plurality of transverse partition plates and longitudinal partition plates are arranged in the tank body to partition the tank body into a plurality of planting cavities, and the lower portion of each of the transverse partition plates and the longitudinal partition plates is provided with an arc opening to enable communication of the lower portions of the planting cavities. Each planting cavity with the upper portion in a solid structure and the lower portion in a hollowed-out structure is in a semi-partition structure, plant bodies are fixed while freeness in transverse huddling growth of plant roots is unaffected, uniformity in moisture circulation is realized, and growth stability of plants is strengthened, so that the plants can withstand influences of severe weather; owing to the water storage troughs and the water drainage outlets, a certain water storage capacity is guaranteed for the water storage troughs while matrixes are protected from being soaked in water; by the aid of the water absorption strips, the water storage troughs supply stored water upwards when the matrixes are in water shortage, frequently watering the plant matrixes is not needed, and accordingly maintenance cost of roof greening plants can be reduced.

The invention relates to a rainwater garden flood prevention device comprising a planting layer, a transition layer and a gravel layer sequentially from top to bottom, and a rainwater circulation device is arranged in the planting layer. The planting layer is formed by laying denitrification filter material. A filter layer is formed by laying coarse sand. The gravel layer is formed by laying gravel and pebbles. An aquifer is arranged under the gravel layer and comprises an upper concrete layer, a lower concrete layer and concrete columns arranged between the upper concrete layer and the lowerconcrete layer. An interlayer is poured between the upper concrete layer and the lower concrete layer. A reservoir is formed between the upper concrete layer and the interlayer. Multiple rows of through holes are formed in the upper portion of the upper concrete layer. A plurality of rainwater wells are evenly formed in the planting layer. The multiple rows of through holes are formed in the upperportion of the upper concrete layer, and vertically arranged water passing pipes are arranged in each row of through holes. The rainwater circulation device is arranged on the upper portion of a sludge storage pool and comprises a water return pipe, a water return pump and a water return pipe network. The rainwater garden flood prevention device has the effect that flood is prevented in a rainwater garden.

The invention discloses sewage treatment equipment which is box-type equipment; an air floatation box (1), a volcanic rock filler box (2), a biological filter material filler box (3), an anthracite filler box (4) and a clear water box (5) are arranged in a box body in the water flow direction, and a water inlet (6) is formed in one side of the air floatation box (1) and connected with a water inlet pipe; a water outlet (7) is arranged on the bottom, on the same side of the water inlet, of the clear water box (5), and a dissolved air pump (8) is arranged on one side of the air floatation box (1); a bubble dispersing disc and the clear water box (5) are respectively connected to the bottom of the air floatation box (1); a backwashing water inlet area (9) is arranged on one side, opposite tothe water inlet (6), of the box body; and a backwashing water inlet pipe (10) is arranged at the bottom of the backwashing water inlet area (9). The equipment disclosed by the invention can be mountedon a bank close to a sewage outlet, treats domestic and industrial sewage discharged from a sewage outlet by utilizing the combination of air floatation and multiple filtering fillers, has the effects of removing suspended matters, degrading ammonia nitrogen, phosphorus and organic matters and the like, improves the water quality and then discharges the sewage into a river channel.

The invention belongs to the technical field of sewage reutilization, and particularly relates to a purifying power generation system of floor sewage. The purifying power generation system comprises a water diversion header pipe, wherein the water diversion header pipe is connected with two water diversion pipe branches, the lower ends of the water diversion pipe branches are connected with vertical flow guide pipes, conical decontamination bodies filled with active carbon are positioned below the vertical flow guide pipes, flocculation basins are positioned below the conical decontamination bodies, a radical sedimentation basin is positioned below the flocculation basins, the basin wall at the upper part of the radical sedimentation basin is a water-permeable wall, a water collecting tank is positioned below the radical sedimentation basin, an infrared valve is positioned at the bottom of the water collecting tank, and the infrared valve is connected with a water turbine through a vertically downward power generation pipeline; the water-permeable wall is provided with a hole, and the hole is internally provided with a high-molecular filter core. According to the purifying power generation system, when the water collecting tank is full filled with water, the infrared valve is opened, reclaimed water inside the water collecting tank enters the water turbine through the power generation pipeline for power generation; when the water inside the water collecting tank is wholly discharged, the infrared valve is closed, and water is collected again. The purifying power generation system disclosed by the invention can carry out power generation by sufficiently utilizing domestic sewage generated by high-rise residents, not only can thoroughly purify sewage, but also can increase the power generation efficiency.

The invention discloses a siltation-free full-storage-capacity water sump, which solves the problem of difficulty in treating the sludge of an existing water sump body. The siltation-free full-storage-capacity water sump is characterized in that a pump nest is arranged on the left end of the water sump body, a curve sludge fishing machine, a sludge storage tank and a bridge type sludge suction system are arranged in the middle, the right end is connected with a hydraulic power station, a sludge classifying screen, a filter press, a conveying belt and an outward transport vehicle in sequence on the inlet slope section of the water sump, the curve sludge fishing machine is connected with the bridge type sludge suction system, and the bridge type sludge suction system walks on the sludge storage tank. According to the siltation-free full-storage-capacity water sump, a siltation stopping and dredging system composed of the curve sludge fishing machine and the bridge type sludge suction system is additionally arranged on a common water sump, a sludge fishing scraper can be dragged to do a curve motion at the bottom of the arc-shaped water sump in water by the curve sludge fishing machine, sludge in the long and narrow and bent water sump can be fished in time, siltation and sediment are prevented from being formed at the bottom of the water sump, and the capacity of the sump is guaranteed; the bridge type sludge suction system is used for cleaning and transporting the sludge conveyed into the sludge storage tank by the sludge fishing machine outwards, so that automatic treatment is facilitated; and the high-intensity labor of regular dredging of personnel is avoided, and serious potential safety hazards such as well flooding caused by the increase of gushing water are eliminated.

The invention discloses novel marble sewage treatment equipment. The novel marble sewage treatment equipment comprises a reserved ore block and a water pump water-suction pipe, a stoping ore block isarranged on one side of the reserved ore block, an ore mining tunnel is arranged around the reserved ore block, a drainage pipeline is arranged on the side, away from the reserved ore block, of the stoping ore block, a ventilating pipeline is arranged on the upper part of the stoping ore block, the upper part of the stoping ore block and the upper part of the reserved ore block are provided with drainage pipelines correspondingly, a water sump is arranged on the lower part of the stoping ore block, a water sump water inlet pipe is arranged on the front surface of the water sump, a liquid leveldetector is arranged on one side inside the water sump, and a water sump protective net is arranged on the upper part, close to the liquid level detector, inside the water sump. The water sump protective net conveniently protects workers passing by the water sump, the problem of safety accidents caused by the excessively large water level of the water sump is avoided, meanwhile, ore falling intowater is also cleared conveniently, and the problems that stone falls into the water sump, consequently clearing is inconvenient, and water storage of the water sump is affected are avoided.

A building dust collection device for building construction, including an exhaust fan, a ventilation hopper, a hose, an air outlet pipe, a wave pusher, a water tank, a collection box, a partition, a filter screen, a water pump, a box body and a control panel; the exhaust fan is set On the top of the box, there is an air inlet channel connected to the exhaust fan on the box body. The air inlet channel, ventilation hopper, hose and air outlet pipe are connected in sequence. The air outlet pipe faces the inside of the water tank. There is a drive mechanism for driving the air outlet pipe to vibrate up and down and driving the wave pusher to reciprocate laterally. The water tank is set on the top of the collection box, the collection box is set inside the box body, the partition is set on the collection box, and the filter screen is set on the partition. And on the collection box, and the filter screen is located under the horizontal side of the water tank, the water pump is arranged on the box body, the pumping end of the water pump is connected with the collection box, and the water discharge end of the water pump is located above the water tank. The invention can effectively absorb the dust, filter the generated dirt, and prolong the usable time of the device.

The invention discloses a bathroom waterproof and overflow-proof drainage device. The bathroom waterproof and overflow-proof drainage device includes a mining block to be mined and a water pump suction pipe; a back mining block is arranged on one side of the mining block to be mined, and mining channels are arranged around the mining block to be mined; the back mining block is provided with a drainage pipe on the side away from the mining block to be mined, and a ventilation pipe is arranged above the back mining block; drainage pipes are arranged above the back mining block and the mining block to be mined, and a water tank is arranged below the back mining block; a water tank inlet pipe is arranged on the front surface of the water tank, and a liquid level detector is arranged on one inner side of the water tank; and a water tank protection net is arranged inside the water tank near the upward side of the liquid level detector. The water tank protection net facilitates the protectionof workers passing around the water tank, therefore, the problem of safety accidents caused by the too deep water level in the water tank is avoided; and meanwhile, the water tank protection net is also convenient to clean the ore falling into the water, therefore, the problem that the water storage capacity of the water tank is affected by the inconvenience of cleaning the stone falling into thewater tank is avoided.

The invention relates to a cement-based material underwater grouting or mud-jack rock block foundation construction method and belongs to hydraulic cement-based material underwater foundation structure construction methods. A forming gabion is used for forming or the excavation boundary of a foundation serves as the outline, chicken girt concrete with the good fluidity and the high sand ratio is poured into a paving rock block stacked body or gaps of the paving rock block stacked body is filled with the chicken girt concrete by means of the self-leveling performance of the chicken girt concrete underwater, and thus underwater cement-based material grouting rock block or mud-jack rock block structure construction is achieved. The cement-based material underwater grouting or mud-jack rock block foundation construction method has the advantages that when underwater grouting or mud-jack rock block foundation construction is conducted and the water depth is smaller than one meter, construction can be directly carried out without draining water, and thus the construction progress can be greatly accelerated and the construction cost is reduced; when the method is used for reservoir risking obviation and reinforcement construction, the water drainage amount can be greatly reduced, and the construction can be completed on the premise that the effect that water is stored as much as possible is effectively ensured.

The invention discloses an integrated steam generating device and an extractor hood. The integrated steam generating device comprises a reservoir, a heating body, a temperature protection device and a protection shell. The reservoir comprises a lower shell body and an upper shell body mounted on the upper portion of the lower shell body. A liquid injection opening and a steam outlet are formed in the upper shell body, and a sealing cover body is arranged at the position of the liquid injection opening. The heating body is attached to the outer wall of the lower shell body. The temperature protection device comprises a temperature control switch electrically connected with the heating body and a temperature sensor used for detecting the temperature in the reservoir, and the temperature sensor is electrically connected with the temperature control switch. A connector is mounted on the protection shell, a first airflow passageway is formed in the connector, and the connector communicates with the steam outlet through a connecting pipe. The integrated steam generating device and the extractor hood have the beneficial effects that a water cup and a water pump do not need to be arranged, thus, integrated design is achieved, the structure is simplified, mounting is facilitated, dirt in the reservoir is conveniently cleaned away, the heating efficiency is high, and temperature rise is easy to control.

The invention discloses a water intake device for a river bed of a power plant, which includes a water inlet, a storage tank and a water intake pump room, the storage tank is arranged between the water inlet and the water intake pump room, and the water inlet and the water intake pump room The adjustment and storage tank is connected, and a grit settling area is provided near the water inlet in the adjustment and storage tank, and the grit settling area is in communication with the adjustment and storage tank. The river bed water intake device of the power plant is provided with a storage tank between the water inlet and the water intake pump room, and the water flowing in from the water inlet will first enter the storage tank, and the water storage capacity of the storage tank is guaranteed during application to meet the needs of the power plant. Long-term continuous water supply safety requirements; and by setting up a sand settling area, the raw water taken from the water inlet can be pre-sedimented at the first time, which greatly improves the quality of the raw water entering the storage tank and the subsequent water intake pump room during the flood period. Reduce the difficulty of overall cleaning and maintenance of the water intake device. During maintenance, it is only necessary to focus on cleaning the sand settling area.

The invention provides a system for controlling silt deposition in a river channel. The system comprises an acceleration section and a deposition section which are located in the river channel, wherein a river channel width D1 of the acceleration section is smaller than a river channel width D2 of the deposition section; a deposition tank is arranged in the deposition section; a slit collecting and dredging device is arranged in the deposition tank. The invention also provides a method for controlling silt deposition in the river channel. The system and the method follow the natural condition and achieve directional orderly flowing of water; the advantage of the tide power is fully utilized; the hydraulic condition of the existing river channel is changed by arranging landscape ecological partition walls under the condition that the scale and the using function of the river channel are not changed; the water can directionally, rapidly, slowly and orderly flow, so that the silt deposition in the river channel is controlled, the water resource is scientifically utilized, and the water environment is completely improved.

The invention provides a multi-cavity sectional type descending gas extracting, drilling and water draining device and method and relates to the technical field of gas extraction. The multi-cavity sectional type descending gas extracting, drilling and water draining device comprises a plurality of sectional type chambers, a gas filling pipe, a water guiding pipe and a float valve; the sectional type chambers comprise connecting pipes and sectional type partition boards and are sequentially connected; the water guiding pipe communicates adjacent sectional type chambers; the gas filling pipe communicates with a hole bottom sectional type chamber; the float valve and a filter net are arranged in the hole bottom sectional type chamber; when drilling and water drainage are carried out on gas, the device is put in a drilled hole; the hole bottom sectional type chamber is filled with water through the gas filling pipe to open the float valve; the accumulated water in the drilled hole enters the hole bottom sectional type chamber and an upper sectional type chamber through the filter net and the float valve; the hole bottom sectional type chamber is filled with gas through the gas fillingpipe to close the float valve; and gas is continuously filled, water in the sectional type chamber is drained upwards along the water guiding pipe section by section, and the operation is repeatedly carried out after the water is drained. The device and the method solve the water accumulation technical problem of extraction and drilling of descending gas and also have the advantage of being simpleand convenient in operation.

An in-building dust collection device for building construction comprises an exhaust fan, a ventilation hopper, a hose, an air outlet pipe, a wave pushing plate, a water tank, a collection box, a partition plate, a filter screen, a water pump, a box body and a control panel, the exhaust fan is arranged at the top of the box body, an air inlet channel communicated with the exhaust fan is arranged on the box body, the air inlet channel, the ventilation hopper, the hose and the air outlet pipe are sequentially communicated, the air outlet pipe faces the inner side of the water tank, the wave pushing plate is located on the inner side of the water tank, a driving mechanism used for driving the air outlet pipe to vibrate up and down and driving the wave pushing plate to reciprocate in the transverse direction is arranged on the water tank, the water tank is arranged at the top of the collection box, the collection box is arranged in the box body, the partition plate is arranged on the collection box, the filter screen is arranged on the partition plate and the collection box and located below one transverse side of the water tank, the water pump is arranged on the box body, a water pumping end of the water pump is communicated with the collection box, and a water draining end of the water pump is located above the water tank. Dust can be effectively adsorbed, generated dirt is filtered, and the service life of the device is prolonged.