200 results about "Water release" patented technology

The invention relates to the technical field of flow field dynamic simulation, and particularly provides a drainage test data fused underground water flow field dynamic simulation method and system near a fault, and the method comprises the steps: generating a fault three-dimensional water conductivity parameter field according to transient water level response data of a monitoring well in a drainage test; realizing conversion of dynamic data of the exploration method to a fault non-uniform quality model; integrating migration path data of a tracing test, fracture network geometric data of ultrasonic logging and a fault three-dimensional water conductivity parameter field, and constructing a heterogeneous graph structure taking a fault as a core node; establishing association between the multi-modal exploration data and the dynamic representation of the fault structure; and outputting a high-resolution spatio-temporal evolution graph of the flow field parameters of the fault disturbance area in the future period, and realizing dynamic visual closed-loop feedback of the flow field near the fault driven by real-time data of the exploration method. The system comprises a data conversion module, a representation association module and a closed-loop feedback module. According to the invention, a breakthrough from static description to dynamic simulation of the flow field near the fault is realized.

An air duct system with a sorption material has a blocking and guiding system which allows a normal operating state of the air duct system without use of the sorption material and a sorption state. The sorption state helps to reduce the drying time and the energy consumption. The air duct system is used in a domestic appliance, such as a laundry dryer or a dishwasher for laundry. The water released during the regeneration of the sorption material can be used for the next washing cycle. Furthermore, a method of operating the air duct system and a computer program for a domestic appliance are disclosed.

The utility model belongs to the field of coal mine drilling blowout prevention holes, and aims to solve the problems that water and coal cinder in a hole easily and directly enter a main pipeline, gas fluctuation is easily caused by opening small negative pressure, and hidden dangers are caused to production efficiency and production safety in a traditional gas-water separation device. The utility model provides a common drill four-hole gas-water separator which comprises an upper-layer barrel, a lower-layer barrel and a pipeline connected between the upper-layer barrel and the lower-layer barrel. The upper surface of the upper-layer barrel body is provided with a pipe orifice for connecting a main pipeline negative pressure, an orifice blowout preventer, an orifice standby negative pressure and a hole wall standby negative pressure; the lower-layer barrel is located at the lower end of the upper-layer barrel, a second valve is arranged at the bottom of one side of the lower-layer barrel, and a first valve is arranged on a pipeline between the upper-layer barrel and the lower-layer barrel. The device is high in reliability, the problem that water and coal slag enter an extraction system in the drilling machine construction process can be effectively solved, and gas fluctuation caused by water drainage is avoided.

The application provides a phase change temperature control internal curing function aggregate for high-strength concrete and a preparation method thereof, and relates to the technical field of building materials. A phase change material paraffin is arranged in an inner layer, and a heat conduction water storage layer composed of carbon fibers, graphite powder, superabsorbent resin, fly ash, phosphorus slag powder, slag powder, quicklime, polyacrylamide, clear lime water and an additive is coated on the outside to form aggregate granulation and molding. The carbon fibers are connected to the dispersed graphite powder to form a heat conduction net structure with line connection points, improve the heat conduction performance, promote the heat conduction between the internal paraffin and the external environment, and the clear lime water activates the fly ash, the phosphorus slag powder and the slag powder in the ingredients to generate a hydration reaction, thereby constructing the strength of the external structure. When the temperature in the concrete is low, heat is released, the whole process is accompanied by slow water release, the double internal curing functions of temperature control and moisture are realized, the cracking of high-strength concrete caused by high hydration heat and large shrinkage is avoided, and the durability of the high-strength concrete is improved.

The utility model discloses a power plant heat pipeline hot water collection subassembly, including fixed link, the outer wall of fixed link is installed with the connecting water pipe, and the outer wall of connecting water pipe is provided with control valve, the lower portion of fixed link is provided with the collecting pipe, and the outer wall of connecting water pipe is through the collecting pipe, and the collecting pipe is used for collecting the hot water of connecting water pipe, the outer wall of collecting pipe is provided with the collecting mouth of being located below control valve, and the collecting mouth is used for collecting the leakage of control valve. Through setting up the collecting pipe, when the power plant heat pipeline is used daily, the hot water can be collected, improve the effect of hot water collection recovery when the power plant heat pipeline exhaust, water quality sampling, water release operation, reduce the water resource waste condition, through the connection of fixed block and hinge, rotate the turnover board, make the collecting mouth expose in the outside setting, when the hot water appears leakage, automatically drop into the collecting pipe, reach the effect of concentrated collection to the hot water of power plant heat pipeline and prevent the hot water leakage drop.

The invention relates to a method for improving the dewatering performance of organic sludge by using a polyether demulsifier, and belongs to the technical field of municipal sludge treatment. The epoxyethane / epoxypropane block polyether is utilized to effectively destroy a stable oil-water emulsification system in the organic sludge, reduce interfacial tension and promote water release, and the dehydration performance of the organic sludge is remarkably improved by destroying an oil-water interfacial film structure. By utilizing the method disclosed by the invention, the dehydration efficiency of the organic sludge can be remarkably improved, the capillary water absorption time of the sludge and the specific resistance of the sludge are remarkably reduced, the Zeta potential of the sludge becomes closer to a positive value, the median particle size of the sludge is remarkably improved, and the water content of a sludge cake is greatly reduced; the method is easy and convenient to operate, existing dehydration equipment can be directly utilized, and extra investment is not needed; the adding proportion of the demulsifier can be optimized according to actual sludge characteristics, so that the medicament cost is saved; the method provided by the invention provides an economic and efficient technical scheme for organic sludge treatment and disposal, and sludge reduction and recycling can be promoted.

The embodiment of the utility model provides a dissolved air nano oxygenation device for drainage basin treatment, which comprises a lifting water pump, a lifting pipeline, a water collecting tank, a booster water pump, a high-pressure water pipe, a dissolved air pressure tank, an air compressor, an air pipe and a nano dissolved oxygen water release pipe, and is characterized in that the lifting water pump conveys river water to the water collecting tank through the lifting pipeline; then the river water is pressurized and conveyed to the dissolved air pressure tank through the high-pressure water pipe by the booster water pump, meanwhile, the compressed and pressurized air is conveyed to the dissolved air pressure tank through the air pipe by the air compressor, and the air is dissolved in water under the action of pressure and is released back to the river channel through the nano dissolved oxygen water release pipe; wherein a plurality of micro-nano bubble release ports are distributed on the pipe wall of the nano dissolved oxygen water release pipe and are arranged in a wave shape. Through the scheme of the embodiment of the invention, the problem of how to efficiently and directly increase the dissolved oxygen content of the water body can be solved.

The utility model discloses water-saving irrigation equipment capable of preventing water source evaporation, which relates to the technical field of structures capable of preventing water source evaporation and comprises a water storage barrel, a water inlet blocking cover arranged at the upper end of the water storage barrel, a water level display component arranged at the side end of the water storage barrel, a water drainage component arranged at the lower end of the outer wall of the water storage barrel and a support frame welded at the bottom end of the water storage barrel. Through cooperation of the stirring impeller and the water discharging assembly, materials such as additives can be better scattered and mixed into water liquid, the water discharging speed is prevented from being regulated and controlled, and therefore the functions of mixing the material liquid and regulating and controlling the irrigation water flow are achieved; the water inlet blocking cover can be blocked, and then the functions of water level detection, rainwater collection controlled by a single chip microcomputer and evaporation loss prevention can be achieved; finally, the problem that evaporation loss is serious when an existing water source storage device achieves the rainwater collection function is solved.

Disclosed herein is an apparatus and method for providing a direct air capture (DAC) system of carbon dioxide to improve the energy efficiency, operability, and economic performance of DAC technologies based on multiple types of methods, including thermal swing adsorption (TSA), pressure swing adsorption (PSA), and moisture swing adsorption (MSA). In particular, disclosed herein is a DAC apparatus comprising a first water extraction unit, a process unit comprising a second water extraction unit, a carbon dioxide capture unit, and a water release unit. The present invention also provides a logic control system for a preconditioner of the proposed DAC apparatus, comprising a controller and one or more control elements in communication with a fluid stream, wherein the controller is configured to adjust the temperature, water content, or a combination thereof of the second fluid stream, the third fluid stream, or both to a predetermined range based on the cost of capturing carbon dioxide on a net removal basis.

The utility model discloses a high-pressure karst water-rich large section highway tunnel drainage and pressure reduction device, which comprises pressure reduction assemblies arranged along the axis of the tunnel in a mirroring manner and a drainage unit communicated with the two pressure reduction assemblies, the drainage unit is used for draining flowing water generated by the two pressure reduction assemblies, and each pressure reduction assembly comprises a pressure control unit, a pressure control unit and a pressure control unit, the pressure control unit comprises a gravel blind ditch arranged at the position of a tunnel wall foot and extending in the direction away from the axis of the tunnel and a water gathering pipe arranged in the gravel blind ditch. The end, close to the tunnel, of the water gathering pipe is connected with a water pressure valve. The stabilizing unit comprises a plurality of positioning ribs evenly distributed on the peripheral side of the water pressure valve and a plurality of obliquely-arranged locking anchor rods, and the ends, away from the water pressure valve, of the positioning ribs and the ends, away from the water pressure valve, of the locking anchor rods are deeply buried in the rock stratum through concrete; water pressure can be released intelligently according to the water pressure condition, drainage is started automatically when the water pressure reaches a certain degree, the threat of the water pressure in a rock stratum to a tunnel lining structure is effectively reduced, and the lining structure is prevented from being broken down and damaged due to too high water pressure.

The disclosure provides a cross-river water diversion structure for collecting tail water and abandoned water downstream of a hydropower station, belonging to the technical field of hydraulic engineering. The water diversion structure comprises a water release gate, a drop well, a river-crossing box culvert, a tail water guiding assembly and an abandoned water guiding assembly. The water release gate is arranged in the tail water channel of the upper hydropower station and is used to cut off the tail water of the tail water channel of the upper hydropower station. The tail water guiding assembly is connected with the tail water channel of the upper hydropower station and is used to introduce the tail water cut off by the water release gate into the drop well. The abandoned water guiding assembly is connected with the stilling basin of the flood discharge tunnel of the upper hydropower station and is used to introduce the abandoned water of the stilling basin of the flood discharge tunnel of the upper hydropower station into the drop well. The drop well has a water outlet, and the river-crossing box culvert is connected to the water outlet and is located below the river channel and is used to introduce the water in the drop well into the water diversion system. The water diversion structure has the effects of improving the flood discharge safety of the upper hydropower station, reducing the disturbance to the ecological environment and reducing the construction cost.

The invention provides a novel quantitative calculation method for the debris flow sand retention rate of a wedge-shaped beam type grating dam, and belongs to the technical field of water retaining, drainage or release buildings in hydraulic engineering. The method comprises the steps that firstly, basic parameters are obtained; step 2, calculating a storage-capacity ratio; 3, designing the width of the opening; 4, building a water tank test device; and 5, constructing a sand retention rate prediction model to calculate the sand retention rate. According to the method, quantitative calculation of the debris flow sand retention rate of the wedge-shaped beam type grating dam is achieved through the logic process of field parameter measurement, dam body parameter calculation, opening width design and sand retention rate model construction.

The object of the present invention is to provide a processing method that makes it possible to improve various characteristics related to a fermented food or beverage that uses a protein ingredient (and, in particular, characteristics of the fermented food or beverage itself such as stress, water retention, suppression of water release, and the like or characteristics of the ingredients of the fermented food or beverage related to fermentation speed during production of the fermented food or beverage). The present invention improves various characteristics of a fermented food or beverage that uses a protein ingredient using the action of a protein deamidase and a multicopper oxidase during production of the fermented food or beverage.

The utility model discloses a fine-grade tailing dehydration device for lead ore processing, which relates to the technical field of tailing dehydration, and comprises a plurality of sedimentation tanks which are communicated with one another, drainage gates are arranged among the sedimentation tanks, and the drainage gates can adjust the height of flowing water between the adjacent sedimentation tanks. The sedimentation tank located at the tail end is communicated with a dehydration device through a water pipe, a water throwing tank is rotationally arranged in the dehydration device, the peripheral side of the water throwing tank is of a latticed double-layer structure, and the double-layer structure of the water throwing tank is filled with a filter element of an annular structure. According to the fine-grade tailing dewatering device for lead ore processing, the dewatering device is arranged, water passing through the sedimentation tank flows into the dewatering device, the water is thrown out after being blocked by the filter element through rotation of the water throwing tank, and tailings are left to be stored in the water throwing tank, so that the water content in the tailings is reduced; and the water can also be poured into the dehydration device to be dehydrated again.

The utility model relates to the technical field of building construction, in particular to a planted roof deformation joint waterproof structure, which comprises a deformation joint and backfill soil arranged on two sides of the deformation joint, and is characterized in that gutters are arranged on two sides of the deformation joint, a retaining wall is arranged on one side, far away from the deformation joint, of each gutter, and the backfill soil is arranged on one side, far away from the deformation joint, of each retaining wall. A filter screen is arranged at the top end of the retaining wall, a plurality of drain holes are formed in the retaining wall, an advanced water stop system is arranged at the top end of the deformation joint, a concrete cover plate is arranged above the advanced water stop system, the concrete cover plate can convey and guide water to a gutter to prevent rainwater from submerging the deformation joint, and the gutter can guide and drain the water to a sewer. The situation that the gutter is full of water and spreads to the deformation joint is avoided, the deformation joint can be sealed through cooperation of a V-shaped aluminum plate and a flexible self-adhesion waterproof roll in the advanced water stop system, waterproof sealing is formed, and rainwater is prevented from permeating into the deformation joint.

The invention discloses ship lock large-volume air-entraining concrete and a pouring vibration exhaust method, and belongs to the technical field of concrete.The ship lock large-volume air-entraining concrete is prepared from 130-160 kg / m < 3 > of cement, 50-70 kg / m < 3 > of fly ash, 50-70 kg / m < 3 > of mineral powder, 600-750 kg / m < 3 > of sand, 1300-1500 kg / m < 3 > of gravel, 3-5 kg / m < 3 > of a water reducing agent, 90-130 kg / m < 3 > of water and 3-4 kg / m < 3 > of an air-entraining anti-cracking agent according to the mixing proportion; a nano-scale super absorbent material is adopted as an air-entraining anti-cracking agent, internal humidity is maintained and a temperature peak value is reduced through water absorption and slow water release, and corresponding nano micropores are reserved in a microstructure through water release and polymer shrinkage, so that the effects of enhancing mechanical properties and resisting cracking after air entraining are achieved.

The utility model relates to the technical field of hydraulic engineering, in particular to a water gate door frame fixing device for hydraulic engineering construction, which comprises a concrete base, a connecting groove is arranged on the inner wall of the concrete base, a limit slot is arranged at the bottom of the inner wall of the connecting groove, and a gate frame is connected to the top surface of the concrete base. A connecting sliding base is fixedly welded to the side face of the gate frame, a limiting inserting rod is fixedly welded to the bottom face of the gate frame, a positioning bolt is arranged on the top face of the connecting sliding base, and a fixing bolt is arranged on the side face of the concrete base. The arc-shaped gate is arranged, the water inlet and the frame are arranged in a staggered mode, water flow is divided along the arc face of the gate, the frame and the connecting position are prevented from being directly impacted, the structure loosening risk is reduced, the stability of the gate body is ensured, and the sliding type filter screen frame is arranged in the gate, so that garbage impurities are intercepted during water drainage and prevented from being clamped into a gate gap to hinder opening and closing.

The application discloses a kind of for promoting walnut incision healing and preparation method and application thereof, it is related to walnut cultivation protection technical field.The healing paste is by elastic film-forming base phase 12-35%, high water absorption / water release humidity particle phase 3-12%, hydrophobic water-blocking microphase 5-22%, rheological and interface control phase 1-8%, osmotic pressure and water activity adjustment phase 5-20% and the rest amount of water and preservative etc.composition according to mass percentage;Film-forming base phase includes aqueous polyurethane-acrylate copolymer emulsion and modified polyvinyl alcohol or polyvinyl alcohol-starch blend, humidity particle phase includes crosslinked sodium carboxymethyl cellulose and crosslinked starch or alginate microparticles, hydrophobic microphase includes beeswax, microcrystalline wax, vegetable oil and rosin resin.By preparing each functional phase in turn and assembling in aqueous system, obtain the healing paste suitable for walnut incision protection under different climatic conditions.

The invention discloses a rigid-flexible combined sediment storage dam structure for intercepting large debris flow, and relates to the technical field of hydraulic engineering, the rigid-flexible combined sediment storage dam structure comprises a dam bottom foundation, a sediment storage dam main body is arranged above the dam bottom foundation, a blocking net is arranged above the sediment storage dam main body, and the two ends of the blocking net are embedded in a mountain through connecting assemblies; the blocking net is further fixed through two supporting piles, and the two supporting piles are connected with the sediment storage dam body. The blocking net is formed by weaving a plurality of steel cables in a cross-shaped structure, and every two adjacent steel cables are connected through a T-shaped buckle or a cross-shaped buckle. According to the rigid-flexible combined sediment storage dam structure for intercepting the large debris flow, a trapezoidal concrete sediment storage dam and blocking net combined structure is adopted, and multiple rows of rectangular drainage holes are combined, so that large-particle solid substances in the debris flow can be effectively intercepted, water flow can be quickly drained and guided through the drainage holes and the blocking nets which are optimally designed, and the debris flow can be effectively intercepted. The fluid impact force borne by the dam body is reduced, and the overall stability is improved.

Golf balls having cores with increased hardness gradients and improved impact durability are provided. The cores have an increased “positive” hardness gradient (or a “hard-to-soft” hardness) where the outer surface of the core is harder than the center. The cores are formed from rubber formulations including combinations of a terpene-based resin, ethylene-propylene-diene (EPDM) rubber, and / or a water releasing agent. The resulting golf balls have increased impact durability and resilience.

The utility model discloses an ecological drainage structure in a diversion tunnel plugging period, which comprises a diversion tunnel inlet structure, an ecological drainage pipe, a diversion tunnel plugging gate opening and closing system and an ecological drainage pipe plugging gate opening and closing system, and the ecological drainage pipe is embedded in a reinforced concrete gate pier on one side of the diversion tunnel inlet structure; a gate groove of the diversion tunnel blocking gate opening and closing system is located in the diversion tunnel inlet structure, and an opening and closing machine is located at the top of a bent frame of the diversion tunnel inlet structure. The gate groove of the ecological blow-off pipe blocking gate opening and closing system is located in the diversion tunnel reinforced concrete gate pier on the same side with the ecological blow-off pipe, and the hoist is located at the top of the diversion tunnel reinforced concrete gate pier on the same side with the ecological blow-off pipe. Ecological protection and water conservancy projects are combined, the structure is simple, the ecological blow-off pipe is pre-buried in the diversion tunnel inlet structure, in the diversion tunnel blocking period, the blocking gate descends to stop water, ecological flow is discharged through the ecological blow-off pipe, and water conservancy projects and ecological protection are combined.

The utility model discloses an anti-overflow drainer, which relates to the technical field of drainers and comprises a water pipe, a water leakage hole is arranged on the water pipe, a drainage structure is arranged in the water leakage hole and can actively drain water, an anti-overflow structure is arranged on the water pipe, and the anti-overflow structure is arranged on the water pipe. The anti-overflow structure can conduct passive drainage, the drainage structure comprises a protection pipe, the protection pipe is fixedly connected with the water passing pipe through a support, and the interior of the protection pipe is slidably connected with a sealing plug; the water drainage structure is arranged, the sealing plug in the water drainage structure can play a role in pressing type water drainage and pressing type water stopping, compared with traditional barrel cover type sealing, the sealing is simpler and more convenient, the condition that a barrel cover is lost is avoided, and the problem that water in the vegetable washing tank overflows due to excessive water can be solved through the arranged anti-overflow structure; and the anti-overflow structure is arranged in the water passing pipe, does not occupy the internal area of the vegetable washing tank, and is convenient to use.

The utility model relates to valve technical field, and disclose a kind of backflow preventer of exhaust, including main valve body, the water release valve seat of main valve body lower side is provided, the water release valve disc is movably attached on the water release sealing ring upper side, water release valve disc and spacer sleeve between are provided with water release pressing plate, the water release sealing ring is movably attached on the water release pressing plate upper side outer surface, the diaphragm upper side of main valve body is provided with diaphragm pressing plate, long valve rod is inserted in the diaphragm inside, the third hexagon nut is provided at long valve rod top end.This backflow preventer of exhaust, by the water release sealing ring of valve cover inside being provided with trace exhaust regulation integrated valve, so that gas in the valve body can be discharged in use process, avoid internal gas to cause the problem that water release valve can not be opened, simultaneously adopt left and right two sub-valve body settings, respectively set spring, avoid long valve rod outer surface directly set spring to thereby seriously affect the sensitivity problem of water release valve opening.

The embodiment of the present application provides a kind of control method of gate, electronic equipment and gate, which comprises: obtaining the water demand information of at least one lower water gate of current water gate in first period;Obtain the water release information of channel between the current water gate and the at least one lower water gate in the first period;According to the water demand information of the at least one lower water gate in the first period and the water release information of the channel in the first period, determine the opening height or rotation angle of the current water gate in the first period.The present application reduces the problem that the water flow through the gate is too small to meet the water supply needs caused by experience decision, and the water resource is wasted seriously when the gate height is higher, improves the utilization rate of water resource.

The invention discloses a rainwater collection and slow release device for vegetation planting, and relates to the field of photovoltaic power station ecological restoration, and the rainwater collection and slow release device comprises microtopography reconstruction, photovoltaic array gap sealing, and a buried rainwater collection and slow release device; according to the miniature reconstruction, a main ditch is dug right below the lower edge of the photovoltaic panel of each row of array, a plurality of single-slope catchment ditches are dug in the vertical direction of the main ditch, and the slope direction faces the main ditch; the photovoltaic array gap sealing is to seal the photovoltaic panel gap between the adjacent array assemblies by using a sealing strip; the rainwater collection and slow release device is located in the main ditch and comprises a rainwater collection opening used for collecting rainwater in the main ditch, a water inlet pipe, a water collection tank and a moisture slow release cover plate. Through surface microtopography transformation, ground rainwater can be effectively collected, the ground rainwater can be collected into the water collecting tank, water in the water collecting tank is slowly released through the water slow-release cover plate, and soil below vegetation is wetted.

The invention relates to the technical field of agricultural planting, in particular to a cold-region-based rice super-high-yield cultivation method and system, and the method comprises the steps: carrying out plowing operation, rotary tillage operation and drought leveling operation after previous-crop rice is harvested to obtain a drought-leveled rice field; in a pre-period of a preset rice transplanting date, performing water drainage and field steeping operation on the dry and flat rice field to obtain a rice field, and performing weeding operation on the rice field with a stable water layer to obtain a weeding rice field; performing water control operation on the weeding rice field to obtain a water depth controlled rice field; the water depth-controlled rice field is subjected to synchronous operation of rice transplanting and fertilization to obtain a straight rice field, the fertilization operation comprises simultaneous fertilization by using pre-constructed special fertilizer, ear fertilizer and potassium sulfate, 20-25 kg of the special fertilizer is applied per mu, 2 kg of the ear fertilizer is applied per mu, and 3 kg of the potassium sulfate is applied per mu; and intermittent irrigation operation based on shallow water, wet land and dry land is carried out on the straight rice field until the rice is mature. The method can improve the yield of rice planting in the cold region.

This utility model discloses an automatic negative pressure slag discharge and water release device for mining, relating to the technical field of mining equipment. It includes a main housing, characterized in that a mechanical control valve is installed at the top of the main housing; a sliding hole is formed on the upper inner wall of the main housing, and a central guide rod is slidably installed inside the sliding hole; a plastic float is connected to the lower end of the central guide rod; a water inlet pipe is connected to one side of the top of the main housing, and a negative pressure balance pipe is connected to the upper side of the water inlet pipe; a slag discharge port is formed at the lower end of the main housing, on the side away from the water inlet pipe, with the plastic float abutting against the slag discharge port; and flap valves are installed at the end of the water inlet pipe near the main housing and on the outside of the slag discharge port. This utility model is relatively small in size and has visual observation windows installed on both sides, facilitating movement and installation during actual underground construction. It can automatically drain water and efficiently discharge slag, eliminating the need for manual drainage. The overall structure is simple, and underground maintenance is convenient.

The utility model relates to a flood discharge gate main wheel sealing structure which comprises a flood discharge gate, a rolling wheel and a wheel shaft, the flood discharge gate is provided with edge beam webs located on the two sides of the rolling wheel, the wheel shaft penetrates through a shaft hole in the middle of the rolling wheel, and the two ends of the wheel shaft are connected to the edge beam webs on the two sides. The idler wheel and the wheel shaft are in rotating fit through a self-lubricating bearing, USH sealing rings abutting against the two ends of the self-lubricating bearing are arranged at the two ends of a shaft hole of the idler wheel, and sealing pressing plates used for pressing the USH sealing rings inwards are arranged at the two ends of the idler wheel. The sealing structure is additionally arranged on the main wheel, so that the sealing performance is improved, sand and stones are prevented from entering the wheel shaft and the self-lubricating shaft sleeve, the problems that a bearing is rusted and blocked after being soaked in water for a long time, a main pulley locking baffle is sheared off and the like are solved, and the running safety and reliability of the sluice gate are improved.

The present application relates to the technical field of coal mine floor aquifer drainage and pressure reduction, and particularly relates to a water pressure drop range and drainage time prediction method applied to underground porous water drainage. The method comprises the following steps: delineating a water-rich abnormal area by multiple means; obtaining the target area's water conductivity and elastic water release coefficient based on group-hole water drainage test data; arranging control points around the working face, especially at places where the aquiclude is relatively thin, calculating the apparent water inrush coefficient and determining the design water level drawdown; combining the water conductivity, elastic water release coefficient of each aquifer and the control point's design water level drawdown to predict the drainage time; reasonably arranging drainage holes in the water-rich abnormal area and establishing an underground multi-hole water drainage system; and further dynamically regulating the water drainage system operation by using the control point's design water level drawdown and drainage time. The present application can predict the drainage time in advance, optimize the construction schedule and improve the overall work efficiency.

The fresh food packaging box comprises a packaging box body, a water drain valve is installed on the side wall of the packaging box body, aerators are installed on the two sides of the packaging box body, a connecting base is arranged above the aerators, and a sealing cover is installed on the top of the packaging box body. A control panel is arranged on the aerator, a battery cover packaging box is arranged below the control panel, a sealing groove is embedded and fixed in the battery cover packaging box, an inclined guide plate is arranged below the sealing groove, a drainage pipe is installed at the bottom of the inclined guide plate, and a plurality of fixing pipes are installed above the inclined guide plate. When fresh aquatic products are carried for a long distance, the packaging box can be filled with water, then fresh aquatic products are placed in the packaging box, an aerator is started in a matched mode, equipment runs under the energy supply of a battery in a battery cover, oxygen is input into a fixed pipe through the aerator and output through an oxygenation head, and water supply in the packaging box is continuously completed; therefore, the aquatic product survival is ensured, the aquatic product does not need to be worried about death when being carried for a long time, and the device is also suitable for a fisherman to put fish and package the fish body to survive.