1157results about How to "Slow down the flow" patented technology

The invention disclseos a light screening structure, arranged on a substrate, where the substrate has display region and non-display region, and the light screening structure comprises black matrix layer and light screening layer, the black matrix layer is arranged on the substrate and defines multiple pixel regions in the display region and covers the non-display region adjacent to the edges of the display region; the light screening layer is arranged on the black matrix layer adjacent to the non-display region on the edges of the display region, the light screening layer has at least a flow channel; and the light screening structure can improve the phenomenon of light leakage on the edges of the display region of the LCD panel. In the LCD making course, the invention can avoid liquid crystal pollution. Besides, the invention advances a color filter substrate with the light screening structure, an active component array structure and the LCD panel thereof.

The invention discloses a low-temperature fast curing underfill adhesive, which is characterized by comprising the following raw materials by weight portion: 40 to 65 portions of resin, 0.5 portion of colorant, 20 to 25 portions of curing agent, 1 to 6 portions of accelerant, 0.1 to 3 portions of coupler and 15 to 25 portions of epoxy active diluents. The preparation method comprises the following steps: firstly, uniformly mixing the resin and color paste for 20 to 40 minutes at 20 to 30 DEG C; secondly, adding the curing agent and the accelerant by three times, uniformly mixing the materials with a three-roller at 20 to 30 DEG C under a condition of chilling drying with cooling water kept at 15 DEG C for 3 times, adding the uniformly mixed materials into a reaction kettle and completely vacuumizing the reaction kettle for 15 minutes; and finally, after the resin and the curing agent are mixed uniformly, adding the coupler and the epoxy active diluents, mixing the materials in the reaction kettle, and completely vacuumizing for 30 minutes to obtain the product. The product is low in curing temperature, high in curing speed and good in storage stability, simple, easy and environmentally-friendly in preparation process, low in cost and wide in application range.

The invention provides a force measuring method of a ventilation model under the condition of a free jet wind tunnel test. The force measuring method of the ventilation model under the condition of the free jet wind tunnel test comprises the following steps that a ventilation model force measuring device is designed, specifically, the ventilation model, a measurement balance, a base, a tail support rod and a hot air flow blocking assembly are included, wherein the measurement balance is arranged in the ventilation model and used for measuring the aerodynamic performance of the ventilation model; the tail support rod realizes the supporting of the ventilation model in a tail support mode, one end of the tail support rod is arranged on the base, the other end of the tail support rod is connected with the measurement balance, and the tail support rod is not in contact with the inner wall of the ventilation model; the hot air flow blocking assembly is arranged between the tail support rodand the inner wall of the ventilation model, so that the tail support rod and the inner wall of the ventilation model are not in contact, and the hot air flow blocking assembly is used for reducing the flow velocity of hot air flow entering the tail of the ventilation model in the ventilation model; the ventilation model force measuring device is placed in a free jet wind tunnel; and the wind tunnel test is carried out to obtain effective force measuring data. According to the force measuring method of the ventilation model under the condition of the free jet wind tunnel test, the technical problems such as the inaccuracy of the model force measuring due to the inability to completely simulate the real flight environment of an aircraft in a conventional wind tunnel in the prior art can besolved.

The invention relates to an air outlet (1), particularly for an air conditioning system of a vehicle interior, comprising a two-part housing (2), which is substantially spherical in the assembled state and in which a first air conducting element (3) and a second air conducting element (4) are disposed, wherein the first air conducting element (3) is configured as a ring element (3.1), on which radially inwardly directed blades (3.2.1 to 3.2. n) of a rigid blade ring (3.2) are disposed, the blade ends of which are mounted on a hollow cylinder (3.3) centrically disposed in the ring element (3.1) for a spot-shaped air outflow, and the second air conducting element (4) is made of at least one further blade ring (4.1, 4.2) having a plurality of blades (4.1.1 to 4.1. n, 4.2.1 to 4.2. n), each radially inwardly directed blade end of which is movably disposed on the hollow cylinder (3), and each radially outwardly directed blade end of which is movably disposed in a predetermined number of ring segments (4.3 to 4.6) that are disposed in the housing (2) in a freely movable manner.

The invention discloses a cooling device of a 3D printer. The device comprises an annular member; and the annular member includes an annular upper part and an annular lower part. A hollow annular cavity is arranged in the annular upper part; annular side wall of the annular upper part is symmetrically distributed with a plurality of upper air inlets; the lower end of the annular upper part is provided with a plurality of annular upper air outlets; and a plurality of the annular gas paths in inverted trapezoid are arranged in the annular upper part. The upper end of the annular lower part is provided with a plurality of lower air inlets; each lower air inlet aligns with one upper air outlet, so that the annular cavity is in gas communication with a plurality of annular gas paths. The device also comprises an air pump. The annular member surrounds the outer side of an extrusion nozzle. The annular cavity in the invention plays a role of buffering to reduce vibration of gas jet; and the inside of the annular lower part is provided with a plurality of concentric annular gas paths to ensure that the cooling range is a uniformly distributed region centered by the extrusion nozzle, ensure same cooling degree on the local raw materials and avoid vibration on the extrusion nozzle.

The invention provides an integrated droplet microfluidic chip structure. All functional modules of droplet generation, amplification and detection are integrated on the same microfluidic chip to achieve the whole enclosed process from the droplet generation to fluorescence detection. The invention also relates to an integrated droplet microfluidic chip structure preparation method and a microfluidic chip assembly. The structure is compatible with the positive pressure or negative pressure drive mode, the pressure response time is short, the rapid droplet generation can be achieved, and the sample preparation time is greatly reduced. Droplet generation oil is not required to be filled in advance, the operation is simple, and popularization and application in the technical field of digitalPCR are facilitated.

The invention relates to a roll typed electric adsorption filter core. The invention has the structure that a roll typed electric adsorption component part is arranged inside a casing, and a liquid inlet, a liquid outlet and an electrode are arranged in the casing. A composite layer, which is composed of a conductive layer, a adsorption layer, a supporting layer, a adsorption layer, a conductive layer, a adsorption layer, a supporting layer and a adsorption layer (totally eight layers), winds on the core shaft, and the fixing layer on the lateral side tightens the composite layer to make the composite layer fixed on the core shaft. When original liquid enters into the filter core through the liquid inlet, and while passing the supporting layer of the roll typed electric adsorption component parts, the charged particles (like metal ions: calcium, magnesium, sodium, lead, mercury, cadmium and so on, and acid radical, etc) are absorbed in the electric double layer on the surface of adsorption layer under the effect of direct current electric field force, and then are effectively removed, and so the liquid is purified. The fluid flow of the roll typed electric adsorption filter core distributes evenly and has strong adaptability to original liquid. The invention has good purification effect, low operation energy consumption, simple structure, low manufacture cost and long useful life, and can purify water, wine, beverage and other liquids.

The invention discloses an activated carbon / coke-based coke oven flue gas desulfurization and denitration system and an activated carbon / coke-based coke oven flue gas desulfurization and denitration method. The flue gas desulfurization and denitration system comprises an activated carbon / coke flue gas purification tower, an activated carbon / coke regeneration tower, a chimney, an ammonia water injection system and an absorption tower, wherein an activated carbon / coke conveyor is arranged between the purification tower and the regeneration tower; the regeneration tower is connected with a high temperature heating system and a regenerated gas pipeline; the ammonia water injection system comprises an ammonia water container; the ammonia water container is connected with a first ammonia water pipeline and a second ammonia water pipeline which are arranged in parallel; the first ammonia water pipeline and the second ammonia water pipeline are respectively communicated with the interiors of aflue gas inlet pipeline and the absorption tower; the bottom of the absorption tower is connected with an ammonium sulfate solution pipeline, and the top of the absorption tower is connected with a waste gas exhaust pipeline; the regenerated gas pipeline is communicated with the interior of the absorption tower; a purified gas exhaust pipeline and the waste gas exhaust pipeline are communicated with the chimney; the activated carbon / coke conveyor comprises an old material conveyor used for conveying activated carbon / coke at the bottom of the purification tower onto the top of the regenerationtower, and a new material conveyor used for conveying activated carbon / coke at the bottom of the regeneration tower onto the top of the purification tower.

The invention discloses a chute with a buffer function for loading and unloading bulk materials, which comprises a chute body with connecting flanges at the end heads, wherein buffer plates are arranged at the inner sides of the chute body, and are rotatably connected with the chute body, and elastic pieces arranged on the chute body are arranged below the buffer plates and are supported on the buffer plates. Since the buffer plates supported by the elastic pieces are arranged at the inner sides of the chute body, and are rotatably connected with the side walls of the chute body, the buffer plates are firstly impacted by materials when the materials pass through the chute, and rotate at a certain angle relative to the chute body under the impact, and the materials slide downwards along the buffer plates, so that the buffer plates have obvious effect of buffering the materials, the flow rate of the materials is reduced, the impact force of the materials on the related equipment is simultaneously reduced, the generation amount of dust is obviously reduced, and the chute is favorable for the quality of the materials, the related equipment and the generation of dust. The chute has the advantages of simple whole structure and low cost, is easy to process, and is convenient to install.

The invention discloses a damping power cabinet capable of effective dehumidification. The damping power cabinet comprises a cabinet body and a rainproof top arranged on the top of the cabinet body. Acabinet door is arranged on the front side of the cabinet body. A storage cavity is opened in the cabinet door. An observation window is arranged in the storage cavity area on the cabinet door. Observation glass for opening or closing the observation window is movably arranged in the storage cavity. The lower end of the side wall of the cabinet body is fixedly connected with a support seat. The support seat is welded on the side wall of the cabinet body. The upper end of the support seat is fixedly connected with a heat exchange box. The damping power cabinet capable of effective dehumidification in the invention can effectively reduce a gap between the observation glass and the cabinet door, can effectively prevent the outside dust and impurities from entering the power cabinet, can collect dust inside the cabinet body and absorb the dust thoroughly, is easy to use, can quickly and efficiently remove moisture inside the power cabinet, thereby extending the service life of electricalcomponents, and in addition, is capable of effective damping to prevent damage of a base to the cabinet body, thereby prolonging the service life of the power cabinet.

The invention discloses a foam water-drainage agent and its aqueous solution, and belongs to the technical field of the oilfield chemical engineering. The foam water-drainage agent is composed of 50-80 parts by weight of a Sapindus mukurossi Gaertn extract, 20-40 parts of fatty alcohol polyoxyethylene ether AEO18, 1-5 parts by weight of polyacrylamide and 5-10 parts by weight of triethanolamine. The foam water-drainage agent has the characteristics of strong foaming capability after meeting water, good foam stability, and high liquid carrying capability and high mineralization resistance of foams, and is suitable for the use in natural gas wells containing gas condensate and having a high mineralization and a large water output; the foam water-drainage agent has a foam stability of 170mm, has a foam water content of not more than 2.0%, has a mineralization resistance of 250g / L, has a gas condensate resistance of 30%, has a temperature resistance of 90DEG C, is non-toxic, is easy to degrade, and does not pollute the environment; and the foam water-drainage agent has the advantages of compatibility with chemicals comprising methanol, a corrosion inhibitor, a scale inhibitor and the like, no chemical reaction with gas or liquid components, no increase to the toxicities of gases or combustion products, and no corrosion to equipment or pipelines.

The invention discloses a drainage channel overflow weir for reducing the agricultural non-point source pollution. The overflow weir consists of a sandstone filtering layer, a combined sewage ecological purification device and a permeable concrete weir. The combined sewage ecological purification device is arranged between the sandstone filtering layer and the permeable concrete weir. The combined sewage ecological purification device consists of a biological filter bed and a fixing algae reaction tank. The sandstone filtering layer is arranged at the head end of a water facing surface of the overflow weir. The overflow weir is arranged in an overflow cross section of a drainage channel. The height of the overflow weir is equal to the daily water level elevation of the drainage channel. The drainage channel overflow weir is scientific and simple, is easy to implement. The overflow weir is arranged in the drainage channel, so that the drainage channel overflow weir has the effects of stopping flowing water, slowing down the flow rate, precipitating suspended matter in the water, removing substances such as nitrogen, phosphorus and the like in agricultural drained water and increasing the dissolved oxygen concentration of a water body. A purifying material has low cost and is easy to obtain. A purification facility is convenient to maintain and manage. The purifying effect on the polluted water is ensured to a certain extent, so that the agricultural non-point source pollution can be well reduced, and the water quality of the rivers and the lakes in the rural areas is improved.

The invention relates to a wind speed-reducing water mist removing device which comprises a toggle joint and a purifying cylinder, wherein the toggle joint is connected with an air inlet pipeline, and the purifying cylinder is connected with an air outlet of the toggle joint; the purifying cylinder comprises an outer cylinder body with an air outlet, a middle cylinder body and an inner cylinder body, wherein the outer cylinder body is installed above the air outlet of the toggle joint and the middle cylinder body and the inner cylinder body are installed in the outer cylinder; multiple layers of damping disks are arranged in both an annular passage between the outer cylinder body and the middle cylinder body and an annular passage between the middle cylinder body and the inner cylinder body; multiple layers of damping disks are formed by mutually spacing at least two small damping disks and at least two big damping disks; and a drain pipe is installed at the bottom of the outer cylinder body. The invention is used for the purification processing of industrial waste gases, and the water mist and the waste gases after being mixed are rapidly discharged into the toggle joint by the air inlet pipeline through an induced draft fan; after carrying out centrifugal shunting, the water mist mixed with smoke and poisonous substances is condensed in the purifying cylinder and separated from an airflow, thus purified air is discharged; and the invention has the advantages of low cost and obvious purifying effect.

The invention discloses a micro-aeration enhanced ecological floating bed sewage treatment device which comprises water plants, a floating carrier, a combined packing layer, a fine bubble aeration pipeline, a support and an aeration machine, wherein plant holes are formed in the floating carrier, the water plants are planted onto the floating carrier through the planting holes and float on the water surface inside the micro-aeration enhanced ecological floating bed sewage treatment device, the combined packing layer is arranged below the floating carrier, the fine bubble aeration pipeline is circularly laid at the bottom of the micro-aeration enhanced ecological floating bed sewage treatment device through the support, and the aeration machine is connected with the fine bubble aeration pipeline at the bottom of the device. Aeration for the device is performed through a micro-aeration system, so that the growth of microbes on plant roots and the combined packing layer is promoted, the synergistic effect of a microbial system and a water plant system is promoted, the device can be used repeatedly, pollution to water cannot be caused, the cost is low, and the device is very suitable for being applied in a large area during natural water body pollution treatment.

The invention discloses a field portable hydraulic and wind supplementary power generation device which comprises a water turbine used for hydraulic power generation, a vertical shaft wind turbine and a power generation device, wherein the vertical shaft wind turbine and the power generation device are used for wind power generation. The water turbine and the vertical shaft wind turbine are not used at the same time. The water turbine comprises a water inlet channel, a water outlet channel, a water turbine rotary shaft, a rotary wheel chamber and a rotary wheel, wherein the rotary wheel is composed of a water guide cone, a hub and water turbine blades, and the water turbine blades are arranged on the hub. The vertical shaft wind turbine is composed of a wind turbine rotary shaft and an impeller, wherein the impeller comprises multiple wind turbine blades and two blade fixing frames. A rotor of a power generator body is connected with a water turbine rotary shaft, and the water turbine rotary shaft is connected with the wind turbine rotary shaft through a coupler. By means of the field portable hydraulic and wind supplementary power generation device, hydraulic power or wind power can be converted into electricity in real time on the spot, and the power generation device is easy to operate, small in size, low in weight, easy to carry, suitable for being used for field illumination, cooking and charging of mobile phones. Meanwhile, a storage battery can be externally connected for electricity storage and can be used as a standby power source during an accidental short-time power failure.

A synchronous powder spreading type metal laser 3D printing powder feeding device comprises a powder storage bin (1), a powder feeding bin (2), a powder feeding belt (3), a powder spreading head (4), a driving transmission gear (5), a driven transmission gear (6), a driving motor (7), a cross beam (18), a cladding head (19) and a shell (11). The powder feeding bin is fixed to the cladding head through a rolling bearing and rotates freely. A transmission gear is installed on the upper portion of the powder feeding bin and meshes with the other transmission gear to form a transmission gear pair, and preset movement is achieved under driving of the motor. The powder storage bin stays still but keeps sliding relative to the powder feeding bin. Powder enters the powder feeding belt from a bottom outlet of the powder feeding bin, is fed to the powder spreading head under driving of a driving wheel and is evenly spread on a base plate under the action of gravity to form a powder layer. The powder spreading head and the shell are together fixed to the cladding head. The powder feeding bin and the cladding head move coordinately through procedure setting, the effect that the powder layer is always directly in front of a laser spot is ensured, and circulating water is adopted for cooling in the powder spreading head.

The invention relates to a method for preventing sand in oil natural gas well, and the formula of relative processing agent, wherein the invention uses fiber to form three-dimension mesh structure, to control the process of discharging sand from storage layer and the formula of processing agent. The invention is characterized in that: first using crack machine and ground tube to extrude pretreatment liquid into storage layer; then using salt water clean liquid to crack; then using fiber composite to process main crack; extruding and completing sand prevention. The invention can eliminate the damage on former oil well storage layer, to improve the leakage condition; and the well eye is filled with fiber composite ring around; the invention can improve yield, realize non-screen sand prevention, and save cost.

The invention relates to a self-propelled complex-finger type cotton picker, belonging to the technical field of agricultural machinery. The self-propelled complex-finger type cotton picker comprises a cotton boll picking platform, a wind power conveying device, a cotton boll separating device, an impurity removing device and a cotton boll collecting box; the cotton boll picking platform is provided with a cotton boll picking finger rod row and a seed cotton delivery outlet; the delivery inlet of the wind power conveying device is in butt joint with the seed cotton delivery outlet of the cotton boll picking platform and is connected with the inlet of the cotton boll separating device; the outlet of the cotton boll separating device is connected with the cotton boll collecting box through the impurity removing device; the cotton boll separating device comprises a separating box; a spike roller is arranged above the bottom of a hopper of the separating box; a direct-current channel is formed above the spike roller; the joint of the inlet of the cotton boll separating device and the hopper is provided with a cotton pressing brush; a grille plate which extends to the outlet of the cotton boll separating device is arranged below the spike roller; and the bottom of the hopper is provided with the cotton boll collecting box through a wind closing device. The self-propelled complex-finger type cotton picker effectively overcomes the defects of non-thorough cotton boll separating and easy blocking, prevents the cotton boll from entering the impurity removing device to cause cotton dying and damping, reduces the impurity rate of the picked cotton and is beneficial to improving the grade of the cotton.

The invention relates to a matrix brick of a greening protect slope and a preparation method thereof. The material of a brick body adopts cement, aggregate, admixture, a porous material and fertilizerand comprises pervious concrete. A matrix block is embedded in the pervious concrete. The preparation method comprises the main steps of high temperature composting agricultural wastes, incineratingand crushing rubbing rice husk and straw, adjusting matrix moisture content and pH value, compressing the matrix block, making up the pervious concrete, preparing the matrix brick by moulding and laying, curing, demoulding and the like. The matrix brick is simple in production technology, low in cost, convenient for transportation and construction management and suited to scale production.

The invention discloses a pulsating heat pipe with steady and monodirectional circular flow, which belongs to the range of heat transfer elements. The pulsating heat pipe is formed by connecting a section of increasing coupling between two pipes with different inside diameters, wherein the increasing coupling can reduce symmetry and harmony of a flow passage, match the flowed friction reasonably, and generate the micropump effect due to the action of the liquid-vapor surface tension to guide work substances to move towards the thick pipe, so as to form monodirectional circular flow. The pulsating heat pipe has the advantages that the pulsating heat pipe has a simple structure, good reliability, and multiple realizing patterns; and the new structure adopted can strengthen stability and controllability of operation of the pulsating heat pipe, and improve heat transfer property of the pulsating heat pipe.

The invention discloses a polysaccharide composite film for arresting bleeding, which comprises a starch film and a chitosan film, wherein the starch film and the chitosan film form mutually bonded structures through drying after the starch film in a liquid state permeates through the chitosan film in a solid state; and the mass ratio of the starch film and the chitosan film is 0.1-1 to 50-1. The invention further discloses a preparation method of the polysaccharide composite film for arresting bleeding. The preparation method comprises the following steps: preparing chitosan solution; preparing starch solution; placing the chitosan solution into a die for solidification and formation so as to obtain a chitosan film; and adding starch solution on the chitosan film and forming through solidification, so as to obtain the polysaccharide composite film for arresting bleeding. In the invention, when the composite film is used for arresting bleeding, various mechanisms for arresting bleeding can be started at the same time, so as to enable bleeding arresting to be more efficient and safe; besides, the composite film material of the invention can be degradable and absorbable, and also can play effective wound protecting and anti-adhesion effects at the same.

The invention provides a display substrate and device, relates to the display technology field, aims to change the shape of a signal wire at a non-packaging area and further prolongs the time of organic solution flowing to a binding area of COF when an ink-jet printing method is utilized to make an organic film of a film packaging layer to reduce the reject ratio. The display substrate comprises a display device arranged at a packaging area of the display substrate, the signal wire extending from the packaging area of the display substrate to the non-packaging area, and the film packaging layer covering portions of the display device and the signal wire at the packaging area, wherein the portion of the signal wire at the non-packaging area has a first edge and a second edge which are opposite in the wire width direction, and the first edge has protruding and sunken parts which are sequentially alternately distributed and face the second edge.

The invention discloses a self-cleaning pipeline filtering device for a water conservancy project. The filtering device comprises a filter pipe, the filter pipe comprises a water inlet and a sewage port, a residue discharging pipe is mounted on the side wall of the filter pipe, a pressure valve is mounted on the residue discharging pipe, a filter screen and a fixing ring are mounted on the inner wall of the filter pipe, the filter screen and the fixing ring are both located between the two connecting positions of the residue discharging pipe and the filter pipe, a spring is mounted at the end,close to the filter screen, of the fixing ring, a piston is mounted at the end, close to the filter screen, of the spring, and a clear water pipe is mounted on the side wall of the filter pipe. The pressure of the residue discharging pipe is higher than that of the filter pipe after the filter screen is blocked, so that water flows along the residue discharging pipe to form negative pressure to peel off impurities on the filter screen; the clean water pipe is blocked through the piston to prevent sewage from entering, the clear water pipe and a blow-off pipe are arranged side by side, the clear water pipe can be closed to open the blow-off pipe to achieve self-cleaning when the filter screen is blocked, the self-cleaning speed is further increased through a pricking needle, and water resources are saved.

The invention relates to a composite starch styptic powder and a preparation method thereof. The preparation method of the composite starch styptic powder comprises the following steps: using potato starch and modified starch as raw materials, emulsifying and cross-linking the potato starch and the modified starch respectively, screening the processed potato starch and the processed modified starch respectively with 150-mesh medicinal sieves, and finally mixing the screened potato starch and the screened modified starch in a certain proportion by a dry powder blending method so as to obtain the composite starch styptic powder. The styptic powder has favorable biocompatibility, good water absorption property and high water absorption speed, can be directly used for general bleeding, deep bleeding and bleeding of parts which are difficult to reach through an operative procedure, is simple and convenient to use, and has good effect of stopping bleeding; the raw materials are free from toxicity and stimulus, wide in sources, low in cost, and simple and feasible in technology, so that the styptic powder has wide clinical application prospects.

The invention discloses an integrated ecological floating bed and a riverway water body purification method. The ecological floating bed includes a floating framework, a floating plate mounted on the floating framework and provided with a plurality of planting holes filled with a plant cultivation matrix, a bamboo charcoal plate placed on the floating plate and provided with through holes in one-to-one correspondence with the planting holes, a plurality of elastic fillers hung below the floating plate, and an aeration system and a microbial tank which are arranged in the elastic fillers; the microbial tank internally contains faculative bacteria. The technical problems that a traditional ecological floating bed has plant growth limited by many limiting factors, the oxygen content in natural water bodies is insufficient, and the number of microorganisms in an ecological floating bed system is insufficient are solved.

The invention discloses a blade root pouring method for a bolt sleeve embedded blade. The method comprises the die cavity preparing step; and lower glass fiber laying, continuous felt laying, embeddedpart laying, upper glass fiber laying, flow guide net laying, glue injecting pipe laying, air exhaust bag laying and glue pouring are carried out. A continuous felt is placed on the lower face of thebottom of an embedded part, a first flow guide net and a glue injecting pipe are laid on the embedded part and the upper glass fiber cloth, and the distance between the starting point of the first flow guide net and the starting point of the embedded part ranges from 0 mm to 300 mm; the first flow guide net is divided into three segments including a rear edge flow guide net, a middle segment flowguide net and a front edge flow guide net in the circumference direction, and a resin deceleration belt with the width ranging from 30 mm to 150 mm is arranged among the rear edge flow guide net, themiddle segment flow guide net and the front edge flow guide net, and the glue injecting pipe is arranged in the length direction of the embedded part; and air exhaust bags are arranged at the position, above the first flow guide net, of the front edge and the rear edge of a blade root. According to the method, the problem that due to uneven resin flow speed, resin in the blade root area of an embedded blade is hollow is solved, and the blade root connecting strength can be further improved.

The invention discloses a ground flattening device for a construction site. The ground flattening device for the construction site comprises a bottom plate, wherein the outer walls of two sides of thebottom plate are separately rotatably connected with moving wheels; a semi-arc groove is formed in the position, which is close to the middle, of the outer wall of the bottom of the bottom plate; theinner walls of the two sides of the semi-arc groove are separately rotatably connected with rotating rods; a grinding roll sleeves the outer wall of each rotating rod; a hydraulic rod is arranged atthe position, which is close to the middle, of the outer wall of the bottom of the bottom plate; a scraping knife is arranged on the outer wall of the bottom of the hydraulic rod; a fixing plate is arranged on one side of the outer wall of the top of the bottom plate; a rectangular opening is formed in the outer wall of one side of the fixing plate; and a cavity is formed in the fixing plate. Thecircumstance that pressing marks remain on the ground when a flattening plate is used for flattening the ground can be prevented, meanwhile, the force of friction between the flattening plate and theground can be reduced, the circumstance that concrete is dry and caked due to water loss of the concrete after the concrete is stored for a long time can be prevented, and the circumstances that the flowing speed of the concrete is over high, excessive concrete is discharged, and thus flattening of the device to the ground is affected can also be prevented.