1481results about How to "Avoid Waterlogging Problems" patented technology

The invention discloses a controlled-salinity cultivation method for plating crop on moderate and medium and severe saline-alkali soil, comprising: before sowing, irrigating saline-alkali soil for pressing salt and making soil moisture with fresh water; applying base fertilizer based on the principal of organic fertilizer into the saline-alkali soil; meanwhile, applying compound fertilizer suitable for the saline-alkali soil as the assistant material; then, ploughing soil, and raking with a leveller to preserve soil moisture; furrowing and making a ridge; covering films and sowing on the high position of the ridge; carrying out close planting; and spraying growth regulator. The cultivation method has the advantages of strong adaptability and high crop output, can be used for improving the utilization ratio of the fertilizer, quickeing the soil fertility cultivation process and bringomg high agricultural use benefits.

A battery mounting structure is provided to prevent water intrusion into a clearance between a battery pack and a floor panel of a vehicle. The battery mounting structure comprises: frame members extending longitudinally on both sides of the vehicle; a floor panel disposed between the frame members; and a battery pack situated underneath the floor panel. A sealing member is interposed between a periphery of the battery pack and a portion extending from a member opposed to the battery pack, and a drain hole is formed in the sealing member to connect an inner side and an outer side of the sealing member.

A rotor blade extension for mounting over a tip of a wind turbine rotor blade, including an airfoil extension portion) configured to extend a length of the rotor blade, a leading edge portion configured to cover a profile of the leading edge of the rotor blade, and a trailing edge portion configured to cover a profile of the trailing edge of the rotor blade, is provided. A wind turbine including a number of rotor blades and a rotor blade extension mounted to each rotor blade is also provided.

The invention discloses a heavy metal contaminated soil remediation device which comprises a contaminated soil layer (1), wherein an isolated adsorption layer (2) covers the contaminated soil layer (1), and a soil dressing layer (4) is arranged on the upper surface of the isolated adsorption layer (2); accumulator plants (5) are planted on the soil dressing layer (4), and a permeable layer (3) is arranged in the soil dressing layer (4); a plurality of water collecting pipes (6) are arranged in the permeable layer (3), and a plurality of water inlet holes (8) are formed in the water collecting pipes (6). The invention further discloses an isolated remediation method using the device. The method comprises the following steps: adsorbing heavy metals in contaminated soil through the isolated adsorption layer (2), then enriching the heavy metals through the accumulator plants (5), removing the accumulator plants (5), and removing the heavy metals in the soil. The heavy metal contaminated soil remediation device has the advantages of low cost, small occupying space and high contaminated soil remediation efficiency.

The invention discloses a solar automatic lifting system for a rainwater grate; the solar automatic lifting system comprises a lifting device and a control mechanism which are arranged below the rainwater grate, and a solar power supply device which is externally arranged, wherein a mounting frame is detachably arranged on the sidewall of a drain well below the rainwater grate; the lifting device is composed of two shear arms which are relatively arranged and a linear motor; two ends of the shear arms are respectively arranged in the rainwater grate and a rail on the mounting frame in a sliding mode; the linear motor is arranged between the rainwater grate and the mounting frame; the control mechanism comprises an external rainfall sensor and a controller; and the controller is arranged inside the well wall of the sewer. The lifting system disclosed by the invention can be used for automatically lifting the rainwater grate according to rainfall, so as to solve the problem that rainwater cannot be removed timely in weathers of heavy rain and rainstorm since the cover of a conventional drain well cannot be opened timely.

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

A combination oven provides for a catalyst chamber for heating and treating a bypass portion of the air circulated within the cooking chamber at a high temperature using a catalyst to process cooking fumes without substantially elevating the desired cooking temperature.

The invention discloses a dry farming direct seeding planting method of rice, which comprises the steps of preparing sprinkling irrigation equipment: the lifting micro-sprinkling irrigation equipment is buried under to-be-planted ground for 30-40cm; processing a field: straws of last stubbles of crops on the to be planted ground are cut into sections, the lengths of the straw sections are 2-20cm, the straw sections are broadcast in soil, a base fertilizer is applied on the soil, and the soil is subjected to ploughing and rotary tillage; preparing rice seeds and seeding: the selected rice seeds are sown on the processed soil uniformly, and then the soil is compacted; and performing sprinkling irrigation: the lifting micro-sprinkling irrigation equipment buried under the ground is used for irrigating the soil sown with the rice seeds, and the water content of the surface of the soil is 40-60%. Therefore, the precision irrigation to the crops is realized; excess water accumulation in the rice field is avoided; and the utilization ratio of water resources is increased. In addition, the straws are turned into organic fertilizers with the passage of time; straw turnover is realized indeed; the method contributes to improving the yield and quality of grains; and environmental pollution due to straw burning is avoided.

The invention provides a water accumulation preventing high-top tent. The water accumulation preventing high-top tent comprises vertical rods, a center rod and supporting top rod groups, wherein a center fixing and connecting seat is installed at the bottom end of the center rod, a connecting pin and a spring is arranged between the center rod and the center fixing and connecting seat, an elongated slot or a pin hole is further formed in the bottom end of the center rod, the center fixing and connecting seat is provided with a blind hole, the blind hole is provided with a pin hole or an elongated slot, the connecting pin penetrates through the elongated slot and the pin hole to connect the center rod with the center fixing and connecting seat, the spring is placed in the blind hole, and one end of the spring presses against the bottom end of the center rod; a water accumulation preventing rod group is additionally connected onto each supporting top rod group. Since the center rod or the side wall of the blind hole is provided with the elongated slot, and the spring is arranged between the center rod and the center fixing and connecting seat, the spring is in a compressed state after the tent is unfolded and an upward force can be applied to the center rod, and thus pits or water accumulation are not easily caused at unsupported positions of tent fabric.

The invention discloses an upstream-blocking and downstream-seepage method for extracting gas in a mining area. The upstream-blocking and downstream-seepage method comprises the following steps of respectively drilling to a position which is 20-30m downward away from a fourth system interface, a position which is 5-6m upward away from a top plate of a seventh coal bed, a position which is 7-8m upward away from a top plate of a tenth coal bed and a position which is 3-5m downward away from a base plate of the tenth coal bed by using drill bits with different sizes and drilling to form a first drilling hole (1), a second drilling hole (5), a third drilling hole (7) and a fourth drilling hole (10); respectively driving a first casing pipe (2), a second casing pipe (6), a third casing pipe (8) and a cork (11); forming through holes (9) in the lower part of the third casing pipe (8), mounting expanding rubber between the second casing pipe and the third casing pipe and closing, then cleaning a well and extracting the gas. According to the upstream-blocking and downstream-seepage method disclosed by the invention, the problem that gas extraction is influenced due to the fact that a mining well seeps water can be effectively solved, the gas in the coal beds is released to the maximum extent and the extracting rate of the gas is increased; meanwhile, predominant threat of the seventh coal bed, the eighth coal bed and the ninth coal bed can be eliminated, the gas emission quantity of a mining face is reduced and the safety of mine production is ensured.

The invention relates to a municipal road drainage structure, which belongs to the technical field of municipal road drainage. The municipal road drainage structure comprises a road main body and an embankment. A drainage well is formed in the road main body close to the embankment; a cover plate is arranged at a wellhead of the drainage well, a filter hole is formed in the cover plate, a mountingframe is arranged in the drainage well in a sliding mode in the vertical direction, a cleaning rod used for being inserted into the filter hole is vertically and fixedly arranged on the mounting frame, and a driving assembly used for driving the mounting frame to ascend and descend is arranged in the drainage well. During rainfall, rainwater on the road main body penetrates through the cover plate to be gathered into the drainage well, the driving assembly drives the cleaning rod to move up and down, and when the cleaning rod moves upwards, garbage blocked in the filter hole is removed, so that the filter hole is effectively prevented from being blocked, the drainage performance is improved, and road surface water accumulation is effectively prevented.

The current invention discloses a flood barrier having a first compartment and a second compartment, both compartments being preferably in an elongated shape from a side sectional view and being parallel in position. The flood barrier also includes a blocking membrane disposed in the second compartment, wherein a bottom end of the blocking membrane is attached to the bottom of the second compartment and a top end of the blocking membrane is attached to a floating member. The flood barrier may be positioned in the ground in front of a building, wherein when flood water approaches, the floating member may be kept afloat and pull the blocking membrane upward to block the invasion of flood water.

The invention provides a construction method of pervious cement concrete. The pervious cement concrete comprises the following materials: cement, gravel, sand, water, a water reducing agent, stone powder or ballast and polypropylene (PP) fiber. The construction method of the pervious cement concrete comprises the following steps: stirring the materials to form a mixture with appropriate dryness-wetness degree; paving the pervious cement concrete by utilizing an asphalt concrete paver for construction and molding; and finally curing the paved and molded pervious cement concrete. The obtained pervious cement concrete is prepared from pervious concrete with sand and takes the PP fiber as a reinforcing agent, thus having the characteristics of high strength, good toughness, good water permeability and good air permeability. In the construction method of the pervious cement concrete, the asphalt concrete paver is adopted for construction without rolling compaction, thus obviously lowering the cost and saving labor hours; and the construction method has the advantages of simple process, high construction planeness, good water permeability, good air permeability and the like.

The invention discloses a fin of a heat exchanger, which is arranged between neighboring flat pipes on a bent part of the heat exchanger. The fin can be bent on the bent part with the heat exchanger and is provided with a notch. The fin contributes to the reduction of the bending difficulty of the heat exchanger along a flow collecting pipe direction and can reduce the influence of a bending procedure on the heat exchanging performance of the heat exchanger to a minimum degree at the same time so as to still keep a relatively high exchanging performance after the fin is bent. The invention also discloses the heat exchanger with the fin.

The invention discloses a sidewalk pavement structure for water permeation, water storage and water discharging. The sidewalk pavement structure comprises a sidewalk, a roadway and a rainwater port communicated with a municipal water discharging system and further comprises a transverse water permeation pipe, the sidewalk comprises a water-permeable surface layer, a water-permeable leveling layer, a water-permeable base layer and an inverse filtering cushion which are arranged sequentially from top to bottom, a groove paved with a filling material is formed in the bottom of the inner side of the inverse filtering cushion, and waterproof geotechnical cloth is arranged at the bottom of the inverse filtering cushion, on the left and right sides of the groove and at the bottom of the groove; first kerbs are arranged on two sides of the sidewalk, and the transverse water permeation pipe communicates the groove with the rainwater port. The sidewalk pavement structure has good water permeating, storing and discharging functions, can effectively prevent water accumulation on the surface of the sidewalk and can relieve pressure of the municipal water discharging system under extreme raining conditions to certain extent; rainwater is avoided permeating into roadbeds, so that long-time stability of the roadbeds is guaranteed; water permeability and air permeability of the sidewalk pavement structure can be improved, and urban 'heat island effect' is relieved to certain content.