138results about How to "Large diameter" patented technology

The invention discloses an ionic liquid modified polyimide nanofiber film and an air purification filter screen based on the ionic liquid modified polyimide nanofiber film, and belongs to the technical field of film filtering materials. The preparation method comprises the following steps: firstly, selecting a diamine monomer and a dianhydride monomer to carry out low-temperature polycondensation reaction, and then carrying out solvent replacement and freeze drying to obtain polyamide acid powder; dissolving the powder to obtain a polyamide acid spinning solution, preparing an ionic liquid / polyamide acid spinning solution on the basis, and carrying out electrostatic spinning to obtain an ionic liquid / polyamide acid nanofiber membrane; and finally, carrying out high-temperature thermal imidization treatment to prepare the ionic liquid / polyimide nanofiber membrane. The method is simple and efficient, the problems of low resistance, high pressure drop and the like of a traditional nanofiber film in air filtration are solved, development and application of the nanofiber film in the field of air filtration are further widened, and the nanofiber film has important scientific significance and application value in the fields of high-temperature filtration, gas adsorption and the like.

The invention relates to the technical field of sewage filtering, and discloses sewage filtering equipment for water resource treatment, which comprises a barrel body, and further comprises an upper turntable, a lower turntable, a water inlet pipe and a water outlet pipe, a circular groove matched with the lower rotating disc is formed in the bottom of the barrel body, and the lower rotating disc is rotationally installed in the circular groove; the filtering assembly is used for filtering impurities in the sewage; the cleaning assembly is used for cleaning the filtering assembly. According to the sewage treatment device, the first net cylinder and the second net cylinder are staggered to form a smaller diameter, a better filtering effect on sewage is conveniently formed, and when filtering holes formed by the first net cylinder and the second net cylinder are blocked, the second net cylinder is moved, so that the diameters of the filtering holes formed by the first net cylinder and the second net cylinder are increased, and the filtering effect is improved. And the first net barrel and the second net barrel can be cleaned conveniently, and the using effect of the equipment is improved.

The invention relates to an automatic vertical ring rolling mill. The technical problems that an existing ring rolling mill is low in automation degree, and a core roller is prone to bending are mainly solved. According to the technical scheme, the automatic vertical ring rolling machine comprises a rack, a motor, a speed reducer, a main body rack, an oil cylinder base, a driving roller, a hydraulic oil cylinder, a machine body main shaft, a transmission shaft, a core roller bearing seat, a lower base, a fixed supporting seat, a core roller, a roller holding machine body, a bearing seat driving oil cylinder and a self-aligning roller bearing. A motor and a speed reducer are arranged at the upper end of the rack, the speed reducer is connected with one end of a transmission shaft, self-aligning roller bearings are arranged at the shaft diameter position of the transmission shaft, and the self-aligning roller bearings are installed on the upper portions of the two sides of the main body rack. The driving roller is installed on the transmission shaft, the lower end of the machine body spindle is connected with a nut arranged on the bottom face of the fixed supporting seat, the roller holding machine body is installed at the upper end of the main machine frame and connected with the hydraulic oil cylinder, and the core roller is installed on the core roller bearing seat which is arranged on the fixed supporting seat.

The invention discloses a ball mill with a dustproof structure for producing amino acid from poultry feathers, and relates to the technical field of ball mills. The device comprises a shell, the outer side face of the shell is rotationally connected with the inner side face of a groove plate, end covers are connected to the two ends of the shell through bolts, a transmission assembly is fixedly connected with the top of a bottom plate, the outer side face of a discharging pipe is fixedly connected with the inner side face of the shell, and the side, away from the shell, of the discharging pipe is bent towards the side, close to the bottom plate, of the discharging pipe; the end, away from the shell, of the discharging pipe is in a flat opening shape, the outer side face of the discharging pipe is fixedly connected with a fixing frame, the side, away from the discharging pipe, of the fixing frame is fixedly connected with the top of the bottom plate, the discharging pipe is in the flat opening shape bent downwards, ground feathers can be sprayed out downwards, flying dust is not prone to being generated, gaps of the flat opening shape are small, and the area is not changed. And the material spraying flow speed can be increased, the material spraying volume cannot be affected, smooth discharging can be conducted, and blockage is avoided.

The invention discloses an alumina-loaded molecular alkane dehydrogenation catalyst and a preparation method and application thereof. The preparation method comprises the following steps: (1) carrying out modification treatment on alumina balls; and (2) adding the modified alumina balls into a dissolved solution of a molecular catalyst, stirring, reacting until the supernatant is colorless, filtering, and drying to obtain the alumina-loaded molecular alkane dehydrogenation catalyst. The catalyst provided by the invention is used in a process for preparing olefin through dehydrogenation of straight-chain alkane, the alkane conversion rate can reach 21% or above, the catalyst is high in catalytic efficiency, good in selectivity and easy to recover, and the activity of the recovered catalyst is still high.

The invention belongs to the technical field of farmland irrigation, and particularly relates to an intelligent farmland water conservancy irrigation pump station which comprises a pump station room connected with a control system of an intelligent farmland, a water inlet pipe opening of the pump station room is communicated with a nearby water area, and a water outlet pipe opening of the pump station room is communicated with a water pump on a water storage tank through a guide pipe. The bottom end of the water storage tank is communicated with an irrigation header pipe through a guide pipe, the side face of the irrigation header pipe is detachably communicated with a plurality of flow dividing pipes, the side face of each flow dividing pipe is detachably connected with a plurality of drip irrigation hoses through a plurality of communicating guide pipes, and each drip irrigation hose is annularly laid around the root of a plant through an annular water retaining mechanism. The annular water retaining mechanism is used for retaining drip irrigation water or fertilizer water dripped on the roots of the plants by the drip irrigation hose; according to the annular drip irrigation device, a fertilizer solution can be sprayed to the roots of plants in an annular drip irrigation mode according to needs, so that the drip irrigation fertilizer solution can be fully immersed in the roots of the plants for fertilization, and loss and waste of the fertilizer solution cannot be caused.

The invention belongs to the field of non-vision field imaging, and particularly relates to a non-vision field imaging system based on filtered back projection and a reconstruction method. Comprising the following steps: 1) setting scene parameters based on a non-vision field imaging requirement; the imaging scene in the step 2) is mainly composed of pulse laser, a shielding wall surface, a relay wall surface, objects outside the sight line, a high-time-resolution device and the like; (3) the pulse laser is focused on the relay wall surface, the pulse laser is emitted, and dot matrix scanning is carried out; (4) the relay wall carries out diffuse reflection on the pulse laser, and the pulse laser irradiates the surface of the hidden object; 5) an imaging module collects diffuse reflection information to obtain an intensity-time 2D space image; and 6) the data processing module carries out filtering back projection calculation processing to obtain hidden object surface information corresponding to each voxel, and outputs the information as a reconstructed image. The method is low in cost, low in hardware equipment requirement and convenient to implement, and the generated reconstructed image is visual.

The invention relates to the technical field of compressors, and discloses an air cylinder assembly and a compressor. The air cylinder assembly comprises a first air cylinder, a second air cylinder and a flow dividing channel. The first cylinder includes an intake passage having an intake port and an exhaust port. The second air cylinder and the first air cylinder are coaxially arranged. The shunting channel is arranged on the first cylinder and the second cylinder. One end of the shunting channel is a shunting inlet and is communicated with the air inlet channel, and the other end of the shunting channel is a shunting outlet and is positioned on the inner wall of the second cylinder. The axial size of the first air cylinder is larger than that of the second air cylinder. Air enters the air inlet channel through the air suction port and then is shunted, enters the first air cylinder through the air outlet and enters the second air cylinder through the shunting channel. According to the compressor, the axial size of the first air cylinder is larger than that of the second air cylinder, the diameter of the air suction port can be increased, the air inlet sectional area can be increased, the air suction amount during high-frequency operation of the compressor is improved, and the air suction efficiency is improved.

The utility model relates to an improved organza yarn spinning machine which comprises a main machine frame and an auxiliary machine frame, a heating box, a false twister and a roller device are installed on the main machine frame, a winding drum is installed on the auxiliary machine frame, the false twister is a double-guide-wheel false twister, the double-guide-wheel false twister comprises a main plate, and two sets of speed increasing assemblies are installed on one side of the main plate in parallel. A small rotor is arranged between the two sets of speed increasing assemblies, an adjusting assembly is installed on the main plate, and the adjusting assembly is connected with the speed increasing assemblies. A cooling device is installed between the main machine frame and the auxiliary machine frame, and after being heated in the heating box, yarn is false twisted through a false twister, penetrates through the cooling device through a roller device and then is wound and formed in a winding drum. According to the utility model, the cooling device is additionally arranged between the conveying roller and the winding drum, so that the temperature of yarns after winding and forming is consistent, and the stability of yarn products is ensured; the double-guide-wheel false twister is adopted to prevent slipping, the transmission ratio of the speed increasing wheel to the rotor component is increased, and the overall structure of the false twister is optimized.

The invention discloses a slow-release bacterial fertilizer as well as a preparation method and application thereof, and relates to the technical field of biotechnology. Comprising the following steps: step 1, preparing a bacterial liquid of bacillus cereus, a bacterial liquid of lysinibacillus slender, a bacterial liquid of acinetobacter schiffei, a bacterial liquid of stenotrophomonas maltophilia, a bacterial liquid of sphingobacterium alcohovorans and a bacterial liquid of bacillus licheniformis into a mixed bacterial suspension according to a volume ratio of 1: (1-2): (1-2): (1-2): (1-2): (1-2); 2, mixing the mixed bacterium suspension with an embedding agent and a cross-linking agent to obtain a first mixed colloid; step 3, embedding the first mixed colloid into the second mixed layer to obtain first compound fertilizer particles; and step 4, embedding the first compound fertilizer particles into a fermented third mixed layer to obtain the slow-release bacterial fertilizer. The prepared slow-release bacterial fertilizer improves the remediation effect of organic phosphorus contaminated soil. The soil fertility is improved, and a good growth promoting effect on plants is achieved.

The invention relates to the technical field of copper pipe heat dissipation, in particular to a micro-channel heat dissipation device based on a copper pipe structure, which comprises a heat dissipation substrate, a copper pipe type heat dissipation channel and a liquid cooling circulation system, the copper pipe type heat dissipation channel is composed of a plurality of plastic copper pipes and replaces a traditional micro-channel or vapor chamber structure. The copper pipe is embedded or fixed in the heat dissipation substrate or on the surface of the heat dissipation substrate, cooling liquid circulates in the copper pipe, and efficient heat dissipation is achieved through the combined action of forced convection heat exchange and heat transfer; the copper pipe has good plasticity and can be subjected to three-dimensional bending forming according to heat source distribution and spatial layout, through the synergistic effect of forced convection and phase change heat transfer, the heat transfer efficiency is improved, particularly, extremely high local heat flow density can be coped, the chip is effectively prevented from being overheated, and the heat transfer efficiency is improved. The heat dissipation channel can be bent and formed in a three-dimensional space according to heat source distribution, accurate matching with the heat source form is achieved, limitation of traditional plane heat dissipation is broken through, and optimal configuration of heat dissipation capacity and heat flux density is achieved.

The invention provides plant fiber container wet blank processing equipment and process. The plant fiber container wet blank processing equipment comprises a pulp chest, a rack assembly, a transplanting mechanism, a pulp suction assembly and a cold pressing assembly, a forming cavity is formed in the pulp suction assembly, pulp enters the forming cavity through a cavity opening of the forming cavity for pulp suction operation, the cavity opening of the forming cavity faces downwards, the pulp suction assembly is far away from the liquid level of the first pulp tank, and the plant fiber container wet blank preforming work is completed; the cold pressing assembly comprises an expansion body, the expansion body can enter the forming cavity along the cavity opening, and the expansion body is filled with a recyclable object so that the expansion body can be expanded to extrude the inner wall of the preformed wet blank in the forming cavity, and a wet blank of the plant fiber container is formed. According to the plant fiber container wet blank processing equipment and process, the plant fiber container wet blank is processed and formed by adopting a cold pressing operation mode of vertical slurry suction operation and inflation expansion of the expansion body, the product quality and the product percent of pass of plant fiber container processing are effectively improved, and market requirements are greatly met.

The invention discloses design of an antibacterial peptide and application of the antibacterial peptide in bacterial infection, belongs to the technical field of biomedical polypeptides, and particularly relates to the antibacterial peptide designed through an amino acid replacement strategy and application of the antibacterial peptide in preparation of drugs for preventing or treating bacterial infection related diseases. The polypeptide designed in the invention has the advantages of short amino acid sequence, high efficiency and rapidness in preparation, strong antibacterial activity, wide antibacterial spectrum and weak red blood cell hemolysis activity, can be used for preventing and treating diseases caused by various microbial infections, and has a good treatment effect on diseases such as pneumonia caused by skin wound infection, sepsis and bacterial infection.

A device for measuring in-situ drilling rock hardness based on a high-pressure water pressure head comprises a hydraulic power system, a data acquisition system, a test probe and a push rod, the front end of the push rod is connected with the rear end of the test probe; the hydraulic power system comprises a manual hydraulic plunger pump; the manual hydraulic plunger pump is connected with the test probe through a reversing three-way valve; the data acquisition system comprises a data recorder, a displacement sensor and a pressure sensor, the displacement sensor and the pressure sensor are arranged on the manual hydraulic plunger pump, and the displacement sensor and the pressure sensor are connected with the data recorder through a signal receiver. The device is simple in structure, convenient to operate and capable of measuring the rock strength of different drill holes, different depths and different point positions so as to obtain the distribution condition of the roadway rock strength, the measuring result is close to the on-site rock mass, a water medium is used for pressure transmission, the measuring process is simple, convenient, environment-friendly and safe, errors in the processes of sampling, processing and the like are avoided, and the working efficiency is improved. And the measurement cost is reduced.

The utility model discloses an engine crankshaft with good sudden increase load resistance, and relates to the technical field of engine crankshafts. One end of the first main shaft is connected with a connecting shaft, one end of the first main shaft far away from the connecting shaft is connected with a first connecting piece, one end of the second main shaft close to the first main shaft is connected with a second connecting piece, and one end of the third main shaft is connected with a third connecting piece. The end, close to the third spindle, of the second spindle is connected with a fourth connecting piece. The opposite ends of the first connecting piece and the second connecting piece are connected with a communicating shaft. The reinforcing rings are preliminarily connected to the connecting shafts by inserting the inserting blocks into the inserting grooves, and then the reinforcing rings are fixed to the exteriors of the first main shaft, the second main shaft and the third main shaft under the action of pointed-end inserting plates, springs and connecting plates, so that convenient assembly of the reinforcing rings is achieved, the diameters of the main shafts are increased, and thickening and reinforcing are achieved; and therefore, the sudden increase negative load resisting capability is better, and the structure is ingenious.

The invention relates to the technical field of rocket engine high-altitude simulation tests, and discloses a diffuser thermal protection design method, which comprises the following steps: determining a gas supersonic flow and gas subsonic flow switching position in a diffuser; the interior of the diffuser is divided into a fuel gas supersonic speed section, a fuel gas subsonic speed straight barrel section and a fuel gas subsonic speed expansion section; a cooling liquid jacket is arranged around the diffuser; the cooling liquid jackets corresponding to the fuel gas supersonic velocity section, the fuel gas subsonic velocity straight barrel section and the fuel gas subsonic velocity expansion section are respectively an A-section cooling liquid jacket, a B-section cooling liquid jacket and a C-section cooling liquid jacket; the diameter of the outer wall of the A-section cooling liquid jacket is larger than that of the outer wall of the B-section cooling liquid jacket. The cooling liquid jackets with different thicknesses surround the fuel gas supersonic speed section and the fuel gas subsonic speed straight barrel section respectively, so that the flowing speed and the heat exchange coefficient of the cooling liquid are increased, heat is transmitted out more quickly, the temperature of the fuel gas subsonic speed straight barrel section is prevented from rising quickly, and then the diffuser obtains more reliable thermal protection.

The invention relates to the technical field of soil sampling, and discloses a mining area soil rapid sampler based on coal mining safety monitoring, which comprises a soil sampling tube, a rotating tube arranged on the top of the soil sampling tube, handles arranged on the two sides of the rotating tube, and a soil sampling unit arranged in the soil sampling tube, the soil sampling unit comprises a communicating component arranged at the top of the soil sampling pipe and a soil sampling component arranged at the bottom of the communicating component; the soil sampling part is used for pushing the soil sampling pipe to rotate to sample soil in the downward pressing process of the rotating pipe, and the communicating part is used for communicating the soil sampling pipe with external air in the soil sampling process of the soil sampling part, so that soil can enter the soil sampling pipe conveniently. According to the soil sampling device, the soil sampling pipe can be continuously pushed to rotate in one direction through the arranged soil sampling component, rotary soil sampling of the soil sampling pipe can be achieved without repeatedly rotating the rotating pipe, the labor intensity of soil sampling personnel is reduced, and the soil sampling efficiency is improved.

The present invention discloses a two-stage large-diameter plug-in throttle valve driven by a voice coil motor, wherein one end of the valve sleeve is connected to the valve cover and a working port is provided on the outer circumferential surface and the other end respectively, a control port, a return port and two annular grooves are provided on the valve cover, a main valve core is located in the valve sleeve and is provided with a valve flap and a swing plate, the valve flap can rotate with the main valve core to control the opening and closing of the two working ports, a torsion spring can drive the main valve core to drive the valve flap to rotate to cut off the connection of the two working ports, a control chamber and a return chamber are formed on both sides of the swing plate, the control chamber is connected to the control port, the return chamber is connected to the return port, the control valve core is connected to the voice coil motor and is provided with a damping groove to change the flow area between the two annular grooves, the two annular grooves are respectively connected to the control port and the return port; a second damping is provided at the control port. The throttle valve adopts a plug-in valve form, has a stronger anti-fouling ability and a larger diameter, can make the overall volume smaller, and can be applied to a wider range of applications.

The utility model discloses autoclaved aerated concrete board mounting connecting piece, including the support rail of wall surface location: two concrete boards are arranged between two support rails, the surface of support rail is provided with a plurality of connecting components, the connecting component includes the connecting clamp plate sliding connection in the surface of support rail, the front side and the back of connecting clamp plate all are seted up with the welding position, the surface of support rail and the inner wall contact position of welding position are provided with the weld, the bottom of support rail is seted up with a plurality of second circular holes, the inner chamber of second circular hole is set up with the expansion sleeve, the expansion sleeve implants the inside of wall body. The utility model discloses the cooperation of support rail and expansion sleeve is used for providing the installation platform for connecting component, and under the cooperation of connecting component, the quick butt joint of two concrete boards is fixed, can reach the purpose that butt joint is simple and quick and connection is stable and reliable.

The utility model discloses an engineering van operating handle mechanical structure, which relates to the technical field of engineering van handles, and comprises a fixed seat, one side of the fixed seat is provided with a mounting plate, and a hollow cavity is enclosed between the fixed seat and the mounting plate; the rotating shaft is arranged in the hollow cavity; one end of the vertical shaft is connected with the rotating shaft, and the other end of the vertical shaft penetrates through the mounting plate and extends out of the mounting plate; the vertical shaft is sleeved with a compression spring, the top of the compression spring is provided with a spacer ring, and the spacer ring compresses the compression spring. The vertical shaft is driven to automatically reset through the compression spring, the operation handle is prevented from shaking left and right under the traction of the compression spring, the accuracy of the handle during operation is improved, and the stability of an engineering vehicle during lifting operation is guaranteed. And the handle structure is more closed, so that the phenomenon of clamping stagnation of the handle caused by penetration of dust, cement and acid-base water is effectively avoided, and the service life of the operating handle is prolonged.

The utility model discloses a forestry pit digging device with adjustable pit diameter, which relates to the technical field of forestry pit digging and comprises a power component, the power component is connected with a transmission component and a moving component, and the moving component is connected with the transmission component. Through the arrangement of the power assembly, the transmission assembly and the moving assembly, the threaded rod on the moving assembly is adjusted, and the threaded rod can drive the tunneling shaft to move synchronously, so that the tunneling shaft can drive the spiral blade to move and the first rotating shaft to linearly move with the radius expanded outwards; then, the power assembly can drive the tunneling shaft on the moving assembly to synchronously rotate through the transmission assembly and perform circular motion around the rotating disc, so that the tunneling shaft can drive the spiral blade to perform reverse circular motion while the spiral blade on the tunneling shaft rotates to perform tunneling, and the diameter of the dug hole is enlarged; in this way, the diameter of the device can be adjusted conveniently, and therefore the device can be used for forestry conveniently.

The application relates to a stone-plastic floor and an extrusion molding preparation method of the stone-plastic floor, and relates to the stone-plastic floor processing technical field.The stone-plastic floor comprises polyvinyl chloride resin, heavy calcium carbonate, calcium-zinc stabilizer, abrasive powder, internal lubricant, and external lubricant; and the preparation steps comprise feeding and mixing, extrusion, calendering, film covering, traction and cutting, and slotting; the low-temperature cold mixing realizes energy saving and consumption reduction, the stabilizer decomposition and lubricant volatilization problems caused by high temperature are avoided, the filler dispersion uniformity and interface bonding force are improved, the large-diameter specification extruder is adopted to improve the production efficiency, the material uniform plasticization is guaranteed by cooperating with the melting section cooling area, the processing stability and the finished product qualification rate are effectively improved, the stability, wear resistance and waterproofness of the stone-plastic floor are finally obviously improved, the service life is prolonged, and the stone-plastic floor has the advantages of environmental protection and production efficiency.

The invention discloses a mycelium-based biological material and a culture preparation method thereof, and belongs to the technical field of biological material engineering. According to the method, the performance of the mycelium-based biological material is efficiently improved by means of exogenous addition of the surfactant and parallel use of liquid fermentation and shallow static culture, the surfactant can improve contact between fungi and a culture medium, the distribution and growth rate of mycelia in the static culture stage of the fungi are increased, and the yield of the mycelium-based biological material is increased. Therefore, the performance of the mycelium-based biological material is improved; a liquid fermentation and superficial layer standing culture combined mode is adopted, and the method is short in time, efficient, environment-friendly, simple in process and low in cost. The mycelium-based biological material produced on the basis of the method has good market prospects and commercialization potential in the fields of functional food packaging, spinning, drug delivery and the like.

The utility model discloses a Chinese herbal medicine cutting device for veterinary medicine production, and belongs to the technical field of Chinese herbal medicine treatment. The Chinese herbal medicine cutting-off device for veterinary medicine production further comprises multiple rows of material containing grooves fixedly formed in the outer circumference of the material stirring block. Cutting grooves are formed in the positions, corresponding to the cutting grooves, of the material shifting block; a blanking block is fixedly arranged on the processing box and located on the lower side of the shifting block; a discharge port is formed in the right lower end of the processing box; through arrangement of a material placing groove and a cutting groove, and cooperation with meshing rotation of a first gear and a second gear, Chinese herbal medicine can be conveyed to one side of the processing box to be cut, and the cut Chinese herbal medicine is prevented from blocking a discharging channel; and the cutter is detachably connected to the rotating shaft, so that the manufacturing cost of the cutter is reduced, and the cutter is more convenient to replace.

This invention relates to the field of carbon nanotube technology, specifically disclosing a high-viscosity carbon nanotube conductive paste and its preparation method. The raw materials for this high-viscosity carbon nanotube conductive paste include ultra-long single-walled carbon nanotubes, short-cut multi-walled carbon nanotubes, conductive carbon black, carboxyl-terminated hyperbranched polyester-polyethylene glycol block copolymer, polyacrylic acid, fluorinated silane coupling agent, γ-butyrolactone, and N-methylpyrrolidone. The high-viscosity carbon nanotube conductive paste provided by this invention achieves uniform dispersion, low volume resistivity, excellent anti-settling properties, and good coating processability of the carbon nanotube conductive paste under high solids content through the synergistic effect of the carboxyl-terminated hyperbranched polyester-polyethylene glycol block copolymer, the fluorinated silane coupling agent, and polyacrylic acid, combined with multi-stage grinding and high-pressure homogenization processes.

The invention relates to the technical field of thermal protection of airborne electronic equipment, provides a liquid cooling structure of an ultraviolet light guide flame detector for aviation, and solves the problem of insufficient protection function of an existing thermal liquid cooling structure. The circuit board connector comprises a shell part (1), a cover plate part (2), a coaxial tube part (3) and a connector (4), and the shell part (1) and the cover plate part (2) are combined to form a cavity for containing a circuit board to be installed and used; the coaxial tube component (3) is arranged at a fluid interface of the shell component (1) and the cover plate component (2), so that internal flow channels of the shell component (1) and the cover plate component (2) are combined into the same liquid cooling flow channel; the connector (4) is installed on the surface of the cover plate component (2), and a contact pin of the connector (4) is connected with an internal circuit board and used for signal crosslinking inside and outside a product. The method is suitable for a new generation of aero-engines.

The utility model discloses a spraying system of a spraying tower, which relates to the waste gas treatment technology, and adopts the technical scheme that the spraying system comprises a tower body, a spraying pipe and a nozzle, the spraying pipe comprises a main pipe and a branch pipe, the nozzle is rotatably connected to the branch pipe, a rotating piece is arranged in the nozzle, and the nozzle is provided with an atomizing opening and a liquid flow opening. The spray head starts to rotate under the action of the rotating part, the treatment liquid in the spray head is sprayed out from the atomization opening and the liquid flow opening under the action of liquid pressure, the treatment liquid sprayed out from the liquid flow opening is large in particle diameter and can effectively combine pollutants with large diameters in waste gas, the treatment liquid sprayed out from the atomization opening is small in particle diameter, and the pollutants can be effectively combined with the pollutants with large diameters in the waste gas. The spray tower is simple in structure, large in dispersion area and longer in hang time, and can be fully combined with pollutants with smaller diameters in waste gas, and meanwhile, as the rotation of the spray head can provide centrifugal force for the treatment liquid leaving the spray head, the treatment liquid sprayed out of the atomization port and the liquid flow port can have wider coverage area, and the working efficiency of the spray tower is improved.

The utility model aims to solve the problem of winding and unwinding a roller shutter, and discloses a roller shutter device for winding and unwinding the roller shutter, which comprises a first frame and a second frame which are symmetrically arranged, a telescopic air bag is sleeved in the first frame, a first sliding plate is arranged on the side of the telescopic air bag, and a second sliding plate is arranged on the second frame. Push rods are installed on the faces, away from the telescopic air bags, of the first sliding plates, push plates are installed on the sides, away from the first sliding plates, of the push rods, supporting rods are evenly installed between the push plates, arch rods are installed between the supporting rods, movable shafts are installed between the arch rods and the supporting rods, the arch rods are sleeved with roller shutters, and the push rods are sleeved with first lantern rings. A first connecting rod is installed on the lower side of the first lantern ring, a second gear is installed at the lower end of the first connecting rod, a first gear is installed on the side face of the first lantern ring, a second connecting rod is installed on the lower side of the second gear, and a screw is installed at the lower end of the second connecting rod. According to the utility model, the cylinder formed by the arch bars is extruded, so that the diameter of the cylinder can be controlled, and more labor is saved when the roller shutter is rolled.

The present application relates to a kind of solid waste bulk pile composite foundation structure, and composite foundation structure is suitable for soft soil foundation;Solid waste bulk pile composite foundation structure includes: several bulk piles, in soft soil foundation It is distributed in rectangle or plum blossom shape, the surface of all bulk piles is wrapped with geogrid, and soft soil is filled between adjacent bulk piles;Hidden pile, hidden pile is arranged in bulk pile, the surface of hidden pile is wrapped with geogrid, and soft soil is filled between hidden pile and bulk pile;Connecting band, connect all bulk piles to form connecting grid layer, the surface of connecting band is wrapped with geogrid;The composition material of bulk pile and connecting band includes solid waste material and water-absorbing expansion resin.The present application also relates to a kind of construction method of solid waste bulk pile composite foundation structure.The present application is cooperated by bulk pile and geogrid, so that all bulk piles and soft soil between piles form composite foundation, realize the deep reinforcement of soft soil foundation, belong to soft soil foundation treatment technical field.

The invention provides an intrusive blood pump. The intrusive blood pump comprises a mesh basket and a flow channel covering film, the mesh basket comprises a cylindrical section which extends along the axial direction of the mesh basket; the runner covering film is arranged around the axis of the mesh basket in the circumferential direction in a surrounding mode. The flow channel covering film comprises a straight section and a flaring section which are arranged and connected in the axial direction of the net basket, the straight section wraps the cylindrical section in the circumferential direction of the net basket, the far end of the flaring section is connected with the near end of the straight section, the flaring section expands and extends in the direction from the far end to the near end, and the flow channel covering film is arranged on the flow channel covering film. And the net basket extends beyond the near end of the cylindrical section in the axial direction of the net basket. Through the configuration, the blood pumping lift and efficiency can be improved; the flow speed at the impeller outlet is reduced, and the pipeline loss is reduced; furthermore, under the condition that sufficient blood flow support is guaranteed, the necessary rotating speed of the impeller can be reduced, and therefore the risk of hemolysis and thrombus occurrence is reduced. In addition, due to the arrangement of the flaring section, the diameter of the flow channel is increased equivalently, and blood blockage is effectively reduced.