44results about How to "Uniform outflow" patented technology

Disclosed is a supersonic speed nozzle used in laser cutting in the technical field of mechanical laser processing, comprising parallel sections, a contraction section, a laryngeal, and a divergent section, all of which are communicated as a whole. The laryngeal is a transitional cross section arranged between the contraction section and the divergent section. The divergent section comprises a first section and a second section, which assure the boundary layers on the wall of the supersonic speed area not disconnected. The first section and the second section are smoothly connected; the first section is arranged between the laryngeal and the second section; the first section is determined by a Blunt-Meier expansion line in the isentropic condition; the second section adopts an arc of large diameter to make the gradient of a curve reduced to 0 according to a simplified Hall designing method. When the invention is used to cut the laser, the cutting effect is good with fast speed and good cutting quality, and the cut lower edge does not have slag hanging. Particularly, when processing metal that is difficult to be processed, the invention can effectively blow away melt metal and other slag of high viscosity, and thus improves the cut quality and efficiency.

This invention discloses a air supplying and discharging pipeline, especially an evenly absorbing and discharging pipeline that is adequate for long distance air supplying and discharging pipeline. It includes a simple and convenient ventilation flow equalizer, which is composed of several air ports arranged on the ventilation pipeline. The projecting area of the air port windward sections on air supplying pipeline section are increased or decreased successively. The flow rate and pressure of air port can be adjusted according to the position of air port, in order to realize evenly discharging or absorbing of the air supplying pipeline. This invention is easy to assemble too.

The invention relates to a simple broken-line scaling supersonic nozzle used for digital controlled laser cutting, which comprises a parallel segment, a shrinkage segment, a throat part and an extension segment. The extension part is a straight line segment; the ratio between the entry radius R0 of the shrinkage segment and the radius Rc of the throat part is determined by the entry mach number M0 of the shrinkage segment, the mach number Mc of the throat part and an aerothermodynamic factor K; the ratio between the exit radius R1 of the extension segment and the radius Rc of the throat part is determined by the exit mach number M1 of the extension segment, the mach number Mc of the throat part and the aerothermodynamic factor K; when R0/Rc is equal to a constant, and R1/Rc is equal to a constant, the exit mach number of the supersonic nozzle is kept as a fixed value under the action of gas pressure. When the supersonic nozzle conducts digital controlled laser cutting, the air stream sprayed from the nozzle is uniform, and the mass flow rate and the momentum are large, thereby effectively blowing off molten metal and other slag. Furthermore, the cut is narrow and tidy, without adhering slag staying on the edge of cutting seam, and the cutting quality and efficiency are obviously improved.

The invention discloses a driving device for a fan-shaped pouring ladle. The key improvement is that the driving device comprises a bracket and a hydraulic cylinder, wherein the bracket is fixedly arranged at the bottom of the fan-shaped pouring ladle; the hydraulic cylinder is symmetrically arranged on two sides of the fan-shaped pouring ladle; one end of the hydraulic cylinder is hinged at the bottom of the bracket; the bracket is attached with the rear external wall and bottom of the fan-shaped pouring ladle; a positioning hook arranged on the rear wall of the fan-shaped pouring ladle is matched with a positioning hole on the bracket; and the other end of the hydraulic cylinder is hinged at the bottom of a pouring framework. The driving device has the advantages that: an angular displacement sensor and an angular speed sensor are arranged on the rotating shaft of the fan-shaped pouring ladle; two sensors transmit acquired signals to a control circuit of a hydraulic station; the control circuit regulates the moving speed of the hydraulic cylinder according to the signals, so that the constant-speed flowing of liquid iron is ensured by the fan-shaped pouring ladle at different angles, the quality of castings is ensured and the economic loss of production enterprises caused by unqualified castings is avoided.

The invention discloses a cooling structure suitable for a high-pressure turbine of a gas turbine. Through the cooling structure, outflow of cold gas along a groove slit can be more uniform, backward-flowing invasion of gas is prevented, and additionally, cooling heat-exchange of the positions, close to the pressure face sides, of the front edges of the end walls is also enhanced. The cooling structure comprises barrier ribs arranged on the positions, close to the force suction face sides of turbine blades, of the front end faces of the blade end walls, and a plurality of gas film holes formedin the positions, close to the pressure face sides of the turbine blades, of the front end faces of the blade end walls, wherein the gas film holes are connected with cooling cavities in the back faces of the blade end walls in a through hole form, P is the pitch of the turbine blades, 0%P serves as the front edge side position of the pressure face of the axially corresponding turbine blade on the front end face, 100%P serves as the front edge side positions of the force suction faces of the opposite adjacent turbine blades, the barrier ribs are circumferentially distributed within the 50-100%P range on the front end face, and the gas film holes are circumferentially distributed within the 0-50%P range on the front end face.

The invention relates to a setting-out device, in particular to a lime setting-out device for road construction. The lime setting-out device for the road construction has relatively high flexibility,is relatively uniform in line drawing, and is not prone to causing waste in the operation process. The lime setting-out device for the road construction comprises a cart, a bracket, a discharging hopper, a feeding cylinder, sloping plates, a cylindrical frame body, a discharging cylinder, a mounting plate, a motor, a first rotating shaft, a first bearing seat, helical blades and the like. The bracket is arranged on the right portion of the upper side surface of the cart, and the discharging hopper is installed at the tail end of the bracket. The discharging hopper is located directly above thecart, and the feeding cylinder is arranged at the lower end of the discharging hopper. The lime setting-out device achieves the effects that flexibility is relatively high, line drawing is relativelyuniform, and waste is not prone to being caused in the operation process. By arranging the cart, the lime setting-out device can be flexibly moved, and the effect of enhancing the flexibility is achieved. By arranging a receiving hopper, lime powder can flow out more uniformly, and the relatively uniform effect of line drawing is achieved.

The invention discloses a closed lateral-symmetry horn mouth water inlet method for a river model test. The method comprises the steps that firstly, a closed water inlet tank is manufactured; secondly, curing and pouring are carried out; thirdly, water storage is carried out; fourthly, water is fed to the water inlet tank; and fifthly, colliding energy dissipation is carried out, and water flow issimulated. According to the method, the water flow which is more stable and relatively free of acceleration can be simulated, and the test result is more accurate.

The invention discloses a rectification device and method for improving water distribution of a diffusion type water inlet box culvert of an urban water delivery pump station. The rectification devicecomprises a first bottom sill, a combined beam and a second bottom sill which are arranged in the diffusion type water inlet box culvert in a water flow direction, wherein the first bottom sill and the second bottom sill are both in a zigzag form, are both arranged on the bottom surface of the diffusion type water inlet box culvert and are symmetrically arranged along the center line of the diffusion type water inlet box culvert; the combined beam comprises multiple beams which are vertically arranged up and down; each beam is in the zigzag form and is symmetrically arranged along the centerline of the diffusion type water inlet box culvert; and an interval is formed between the beam at the lowermost part and the bottom surface of the diffusion type water inlet box culvert. According tothe rectification device and method disclosed by the invention, by adopting the first bottom sill to perform rectification on forward inflow of the diffusion type water inlet box culvert to fully diffuse a water flow, the combined beam homogenizes flow rate distribution on a vertical face of the combined beam, and then the flow rate distribution condition of the water flow on a plane is improved through the rectification effect of the second bottom sill, so that uniform outflow of the diffusion type water inlet box culvert is realized, and good inflow condition is provided for the urban waterdelivery pump station.

The invention relates to a novel environment-friendly anhydrous stemming for a blast furnace iron notch. The novel environment-friendly anhydrous stemming for the blast furnace iron notch is characterized by being prepared, by mass, 10-20 parts of coke, 10-20 parts of calcined pyrophyllite particles, 10-20 parts of brown fused alumina particles, 10-20 parts of bauxite powder, 5-10 parts of ferro silicon nitride, 5-10 parts of silicon carbide powder, 10-20 parts of clay, 5 parts of a carbon-based composite material and 5-10 parts of a composite binding agent. The novel environment-friendly anhydrous stemming for the blast furnace iron notch and a preparation method of the stemming have the following advantages that the pollution is small, the environment-friendly performance is good, and the stemming is a first choice of am iron and steel enterprise; the plasticity and cohesive property are good, the stemming is easily extruded into gaps and cracks, and the gaps and cracks are easily filled with the stemming; the porosity is proper, and moisture is conveniently discharged during drying; the volume contraction is small at high temperature, so that the cracks are prevented; the stemming is good in sintering performance, high in strength and resistant to flushing and corrosion; the stemming is easily cracked, the iron notch is deep, and the iron outlet time is long.

The invention provides a sewage biological denitrification and dephosphorization device, which comprises a casing (1) of a vertical tube body, wherein an outer vertical plate (2) is positioned insidethe casing and communicates with a water outlet opening (1d) and a sludge-water separation region (4) formed between the casing walls; an inner vertical plate (3) is positioned in the casing; the upper and lower ends of a water flow ascending passage (5) positioned at one side are respectively communicated with the upper and lower parts of a water flow descending passage (6) positioned at the other side; a water flow circulation passage is formed in the casing; an inlet of the sludge-water separation region communicates with the middle and lower part of the water flow descending passage; a sludge gathering region (7) arranged under the inner vertical plate communicates with a water inlet (1a) and a sludge discharging opening (1b) of the bottom wall of the inner cavity of the casing; a sludge water inlet of a sludge pump (8a) arranged in a sludge lifting device (8) communicates with the sludge gathering region; a spraying component (8b) is positioned at the middle lower part of the water flow ascending passage (5); an aerator (9b) arranged in an air supply device (9) is positioned at the middle lower part of the water flow ascending passage (5). The sewage biological denitrificationand dephosphorization device has the characteristics that the treatment effect is improved; the operation is stable.

The invention discloses a foam prevention and control industrial dust method and an evaluation device, relates to the technical field of industrial dust prevention and control, and can realize comprehensive evaluation of dust removal performance of different foams at different temperatures. The device mainly comprises a transparent shell, a foam spraying device, an air supply device, a spiral outflow device, a digital display temperature sensor, a dust control device, a heating device, a high-speed camera, a thermal imager and a dust concentration monitoring device, wherein the foam spraying device is positioned in the transparent shell and is connected with the external foam generating device through a horizontal pipeline; dust concentration monitoring devices which are annularly and uniformly arranged are arranged above and below the foam spraying device; the spiral outflow device is located at the bottom of the transparent shell and outwards connected with a digital display temperature sensor, a dust control device, a heating device and an air supply device in sequence through a horizontal pipeline; the high-speed camera and the thermal imager device are arranged outside the transparent shell. The whole set of testing device is simple to operate, low in cost, good in controllability and comprehensive in testing parameters, and is particularly suitable for evaluating and researching the dust removal performance of different foams at different temperatures.

The invention relates to the technical field of electronic commerce wafer coating, and discloses wafer coating detection equipment for an electronic commerce control chip. The wafer coating detectionequipment comprises a conveyor belt, wherein an elastic plate is movably connected to the bottom of the conveyor belt, a support rod is movably connected to one side of the elastic plate, an arc-shaped cover is movably connected to the interior of the elastic plate and located at the bottom of the conveyor belt, an expansion frame is movably arranged in the arc-shaped cover, an air storage bag ismovably connected to the surface of the expansion frame, rollers are movably connected to the left and right ends of the expansion frame, a homogenizing layer is fixedly connected to the bottom of theconveying belt and located on the surface of the expansion frame, and liquid storage pipes are fixedly connected to the left and right sides of an airflow groove. Part of air flowing out of the air storage bag flows out of an air flow groove, the other part of the air flows to the surface of a sliding plate,so that the sliding plate can be blown to extrude epoxy resin in the liquid storage pipe to be sprayed out of a guide nozzle, the driving force of the sliding plate extruding the epoxy resin is the weight of a wafer, and therefore, the effect that the coating amount is matched with the weight of the wafer is achieved.

The invention discloses a novel fire extinguishing pipeline system. The novel fire extinguishing pipeline system comprises a main pipeline and at least two auxiliary pipelines, wherein the main pipeline comprises a main flow pipe and a spherical flow dividing body; the spherical flow dividing body comprises a cavity, a first runner and at least two second runners; the main flow pipe communicates with the first runner; the first runner and the at least two second runners communicate with the cavity; the at least two second runners are evenly distributed in the circumferential direction of the spherical flow dividing body, and the second runners and the first runner are obliquely arranged; and each auxiliary pipeline comprises a connecting pipe and a connector, wherein one end of the connecting pipe is connected with the spherical flow dividing body, the at least two connecting pipes and the at least two second runners are arranged in a one-to-one correspondence manner, and the connectoris arranged at the end, deviating from the spherical flow dividing body, of the connecting pipe. According to the novel fire extinguishing pipeline system disclosed in the embodiment, the spherical flow dividing body is adopted for flow dividing, the second runners on the spherical flow dividing body are distributed in a completely symmetric manner, the pressure drop is consistent, and the purpose of uniform outflow is achieved.

The invention discloses a turbine guide vane end wall composite cooling structure. Multiple rows of first air film holes are included, the first air film holes are formed in a guide vane end wall at intervals, the guide vane end wall is connected with an impact plate through an impact cavity leading edge side plate and an impact cavity trailing edge side wall, multiple rows of impact holes are formed in the impact plate, and the impact holes and the first air film holes are arranged in a staggered manner. Second air film holes are formed in the impact cavity trailing edge side wall, cooling air impacts the inner side of the guide vane end wall through the impact holes to form impact transverse flow, and the impact transverse flow achieves end wall external air film cooling and secondary cooling of the downstream end wall through the first air film holes and the second air film holes. Performance improvement of internal impact cooling and external air film cooling of the end wall is taken into consideration, the synergistic effect of internal impact cooling and external air film cooling is brought into full play, the comprehensive cooling performance of the end wall is effectively improved, meanwhile, the secondary cooling effect of cold air to the downstream moving vane end wall is utilized, the cold air use amount of the end wall is reduced, and the overall performance of an aero-engine is improved easily.