14results about How to "Reduce local resistance" patented technology

The invention relates to the technical field of coal mills, and discloses a high-uniformity low-energy-consumption static nozzle ring device which comprises a nozzle ring, a wear-resistant block and a pressing and blocking piece. The nozzle ring is fixed in the machine shell, the nozzle ring and a millstone supporting ring in the machine shell are coaxially arranged, a through-flow area of the nozzle ring is provided with a first airflow channel, a second airflow channel and a third airflow channel which are sequentially communicated from bottom to top, and a plurality of first blades are arranged in the second airflow channel to divide the second airflow channel into a plurality of first nozzles. The through-flow area of the first nozzle is gradually increased from the position close to the primary air outlet to the position far away from the primary air outlet; and the wear-resistant block is limited in the third airflow channel of the nozzle ring through the pressing and blocking piece. The airflow velocity distribution of a through-flow area is simulated through an experiment, and the through-flow area of a runner is adjusted by using a spline curve, so that the flow velocity of a flow field in a whole nozzle ring area is more uniform, the abrasion condition of an abrasion-resistant block and a machine shell is effectively improved, and the overall service life is prolonged.

The invention discloses a flue gas waste heat recovery device and method for a garbage incinerator. Relates to the technical field of waste incineration treatment and comprises a waste heat recovery box, a heat exchange pipe set driven by a main control gear, a transfer gear and a fixed gear ring is arranged in the waste heat recovery box, and heat exchange pipes conduct revolution and autorotation in smoke at the same time to enhance heat exchange. Accumulated dust on the outer surface of the heat exchange tube is removed through the rotating treatment scraper and the removing brush cylinder, and the reciprocating treatment kettle is used for knocking the tube wall of the heat exchange tube to shake off the dust; the flow speed and the flow direction of flue gas can be intelligently adjusted through an angle-adjustable speed adjusting plate on a treatment scraper, so that the device is suitable for different working conditions; the device realizes efficient and stable recovery of flue gas waste heat, can keep a heat exchange surface clean on line, and is high in adaptability.

The utility model discloses an axial flow fan outlet airflow large corner drag reduction device, which relates to the technical field of axial flow fans, and comprises a flow guide cover, a flow guide ring and a flow dividing ring, the flow guide cover is used for being fixed in an air cap and covered above a casing, the flow guide cover is of a structure with a concave middle part, the outer edge of the flow guide cover is attached to the inner wall of the air cap, and the flow dividing ring is arranged on the flow guide cover. A flow guide channel for air flow in a main flow area of the fan outlet to flow out is formed among the flow guide cover, the air cap and the upper edge of the machine shell; the flow guide ring is used for being fixed to the upper edge of a machine shell, the outer wall of the flow guide ring is attached to the inner wall of the upper edge of the machine shell, the section of the flow guide ring is in a streamline shape with the round upper portion and the sharp lower portion, and the flow dividing ring is used for being fixed to the upper portion of the flow guide ring. A flow dividing channel allowing airflow of a near-wall-face area of the fan outlet to flow out is formed between the flow dividing ring and the flow guiding ring. The utility model further discloses an axial flow fan system which comprises the axial flow fan, an air cap and the axial flow fan outlet airflow large-rotation-angle resistance reduction device.

The utility model discloses a gradually-expanding reducing resistance-reducing type kiln system outlet pipeline structure which comprises a bent pipe, a connector ring is connected to the upper end of the bent pipe in a sleeved mode, a diameter-expanding pipeline is installed on one side of the connector ring, a pipe opening is integrally connected to the end, away from the bent pipe, of the diameter-expanding pipeline, a butt joint piece is fixedly arranged on the surface of the diameter-expanding pipeline, and the butt joint piece is connected with the connector ring in a sleeved mode. A connecting piece is fixedly arranged on the surface of the butt joint piece, a hanging ring is movably connected to the interior of the connecting piece, a fixed lantern ring is installed on one side of the interface ring, and a hook is movably connected to the surface of the fixed lantern ring; the diameter of the expanding pipeline is larger than that of the bent pipe, and the expanding pipeline and the bent pipe are in a gradually expanding and reducing mode, so that the change of the diameter of the pipeline is gradually expanded, the smoothness of the pipeline is improved, the resistance loss is reduced, the air flow speed and flow are better coordinated, and then the fan is kept running stably to prevent the stall phenomenon.

The invention relates to the technical field of recovery systems, in particular to a fermented grain spreading cooling dead steam efficient recovery system and an intelligent control device thereof. According to the technical scheme, the waste steam collecting device comprises a gas collecting assembly, the gas collecting assembly comprises multiple sets of main gas pipes, multiple sets of connecting branch pipes are connected to the main gas pipes, one ends of the connecting branch pipes are connected with gas collecting hoods, and the multiple sets of gas collecting hoods are located above a fermented grain spreading and cooling machine, a steamer, a fermented grain turning position and a vinasse pouring position respectively and used for collecting waste steam generated at all positions; the condensing mechanism is connected to one end of the main air pipe and is used for condensing dead steam; and the intelligent resistance balance assemblies are respectively arranged on the fermented grain spreading and cooling machine branch and the steamer branch and are used for dynamically adjusting the resistance of each branch. The system can realize efficient capture and recovery of the dead steam in brewing production, reduces the operation energy consumption of the system, improves the response speed and the operation stability of the system to working condition fluctuation, and ensures efficient development of brewing production.

This utility model discloses a vehicle air conditioning duct, belonging to the technical field of air conditioning systems for three-wheeled motorcycle canopies. It mainly includes a duct base, with a first and a second duct connection cover sealed to the base for distributing airflow. The first duct connection cover is sealed to a first and a second duct for connecting to a surface air vent. The second duct connection cover is sealed to a defrost transition duct. A main defrost outlet is located at the end of the defrost transition duct furthest from the duct base. Side defrost ducts are connected to both sides of the defrost transition duct, with a side defrost outlet at the end of each side duct. This utility model, by optimizing the duct structure, significantly reduces wind resistance, increasing airflow by 15%-20% without changing the fan power. It also reduces the severe impact and turbulence between the airflow and the duct wall, effectively reducing aerodynamic noise generated by the duct system and improving driving comfort. This utility model is mainly used in three-wheeled low-speed motorcycle canopies.

The invention relates to the technical field of oil well yield metering, in particular to an oil well yield three-phase intelligent metering device which comprises an oil storage module used for storing a gas-containing liquid-phase mixture produced by an oil well; the separation module is connected with the oil storage module and is used for separating mixed gas from mixed liquid of the gas-liquid-phase mixture in the oil storage tank; the detection module is respectively connected with the oil storage module and the separation module and is used for detecting the cumulative yield of the separated mixed liquid, the moisture content of the mixed liquid and the cumulative yield of the mixed gas; the control module is connected with the oil storage module, the separation module and the detection module and determines a detection error processing mode according to the predicted yield and the actual yield, and the accuracy of three-phase analysis of the oil well yield and the accuracy of actual yield detection are improved.

The utility model discloses a large electric dust collector flow field improving device which comprises an electric dust collector inlet end socket, a flow guide mechanism, a flow equalizing plate I, a flow equalizing plate II and a flow equalizing plate III, and the flow guide mechanism, the flow equalizing plate I, the flow equalizing plate II and the flow equalizing plate III are sequentially arranged in the electric dust collector inlet end socket in the flue gas flow direction. The flow guide mechanism comprises two transverse flow guide plates and two longitudinal flow guide plates, the longitudinal flow guide plates and the transverse flow guide plates are arranged in a crossed mode to form a plurality of flow guide holes, the two transverse flow guide plates are symmetrically arranged, and the distance between the smoke airflow facing ends is smaller than that between the smoke airflow back ends. Compared with the prior art, the dust removal device has the advantages that the dust removal efficiency can be improved, the service life of equipment can be prolonged, the energy consumption can be reduced, and the operation safety and stability of the equipment can be improved.

The invention relates to the technical field of valves, and provides a lifting type slow-closing one-way valve device which comprises a valve body. Upper and lower openings of the valve body are respectively provided with an upper flange cover plate and a lower flange cover plate; the upper dead center limiter is fixedly mounted on the upper flange cover plate, and a low-resistance reset spring is fixedly mounted at the lower end of the upper dead center limiter; the lifting valve plate is arranged below the low-resistance reset spring; the valve body partition plate is fixedly connected to the interior of the middle main body part; the valve plate guide rod is fixedly installed on the valve body partition plate, and the lifting valve plate is arranged on the valve plate guide rod in a sleeving mode; the piston sleeve is mounted on the valve body partition plate; the piston and the fixed connecting rod are arranged in the piston sleeve; and the shock absorption damping spring is arranged in the piston sleeve and located below the piston, and the bottom end of the piston sleeve is plugged through an open nut. According to the technical scheme, the closing time of the valve plate can be delayed, the impact force of a water hammer on the valve clack is reduced, and the pressure of the pipeline water hammer is reduced.

The utility model discloses a gene sequencing kit structure which comprises a kit body, a first cavity, a second cavity and a hot-pressing negative plate box cover, the inner wall of the kit body is fixedly connected with a first positioning rib position and a second positioning rib position, and the first positioning rib position is located on one side of the second positioning rib position. According to the gene sequencing kit structure disclosed by the utility model, the problems of serious glue shortage during injection molding, perforation of the side wall of the cavity and infirm welding during heat sealing are analyzed and improved, the kit with excellent sealing performance is obtained, the rib position structure of the side wall of the kit body is optimized, the thickness of the bottom of the local rib position is increased, and the reliability of the kit is improved. The local resistance during injection molding filling is reduced, the problem of lack of glue or perforation during injection molding of the kit body is solved, after the thickness of the hot-pressing bottom plate and the box cover is optimized, the face thickness is increased, the heat supporting strength is enhanced, the height of a heat sealing hole of the box cover is increased, the welding firmness is enhanced, and the problem of liquid leakage during heat sealing of the kit is solved.

The valve body assembly comprises a valve body and a flow guide valve seat, the valve body is provided with an upper opening, a side face connector and a lower connector which are oppositely arranged, the flow guide valve seat is provided with an upper opening and a lower center opening which are oppositely arranged, the lower center opening of the flow guide valve seat is a valve hole, and the valve hole is communicated with the side face connector. At least one eccentric flow guide hole is formed in the side face of the upper portion of the flow guide valve seat, the bottom of an inner cavity of the flow guide valve seat is funnel-shaped, the flow guide valve seat is arranged in the valve body, and the lower portion of the flow guide valve seat is inserted into or penetrates through a lower connector of the valve body and welded to the valve body. According to the electronic expansion valve adopting the technical scheme, the reliability and stability of the electronic expansion valve can be improved, fluid does not directly impact the valve needle when entering the valve body assembly, the fluid spirally flows through the valve port, vibration of the valve needle is reduced, and noise of the fluid in the valve body is reduced; the fluid flows reversely and enters the valve body through the valve hole, the channel is gradually expanded, flowing howling noise is reduced, and therefore the problem that in the prior art, an electronic expansion valve is large in noise can be effectively solved.

The utility model relates to the field of municipal works, and disclose a kind of municipal rainwater and sewage diversion pipeline automatic switching diverter, including diversion well, the side of diversion well is connected with inlet pipe, the other side of diversion well is connected with rainwater pipe and sewage pipe, the diversion well cavity is provided with diversion subassembly, diversion subassembly includes rotating plate, flow guide part and rotating part, the water inlet of fixed installation at the top end of rotating plate is included in flow guide part, the side of water inlet is connected with converging pipe, the one end of converging pipe is connected with bellow. Set diversion subassembly, rotating part and flow guide part work cooperatively, can be automatically adjusted flow guide direction according to flow, the water flow of sewage is smaller, directly through diversion well through sewage pipe and flow into sewage treatment station, when rain is heavy, the rainwater flow in inlet pipe is big, so that rotating part drives flow guide part to rotate from inclined state to horizontal state, rainwater enters rainwater pipe through diversion subassembly, directly direct discharge natural water body, reduce pipe network pressure.

The utility model belongs to the technical field of power transmission, and particularly relates to a conversion monofilament for a copper-aluminum flexible transition submarine cable, which comprises four embedded blocks which are aluminum alloy pieces, and the melting point of each embedded block is lower than that of pure copper and pure aluminum; the two conductive sections are a copper wire section and an aluminum wire section, a strip-shaped block is arranged at the butt joint end of the conductive sections, a rectangular groove is formed in the end face of the strip-shaped block, and the rectangular groove penetrates through the surfaces of the two sides of the strip-shaped block in the width direction of the strip-shaped block; wherein the butt joint ends of the two conductive sections are inserted in a cross shape, four embedding grooves are formed, and the embedding blocks are arranged in the embedding grooves in a one-to-one correspondence mode, so that the whole monofilament is of a cylindrical structure. According to the utility model, a crisscross clamping design is formed, the contact area of copper and aluminum is increased, radial limiting is formed, the mechanical connection strength is improved, stress concentration is dispersed, the risk of welding spot fracture is reduced, the electrical performance is improved, metallurgical bonding is realized, seamless connection is formed, firm connection is ensured, and the service life is prolonged. And the whole monofilament is kept in a cylindrical structure.

The utility model belongs to the technical field of column tube heat exchanger, especially a column tube heat exchanger baffle, including column tube heat exchanger body, the surface fixed mounting of column tube heat exchanger body has the protection shell, the inner wall fixed mounting of protection shell has the baffle, the surface of protection shell is opened the pipe hole, the surface of baffle is opened the flow guide hole, the side fixed mounting of protection shell has the flanging lug, the side of baffle is opened the flow guide groove. Fluid flows in the column tube heat exchanger body in the process, fluid will be guided by the flow guide groove of baffle one side, make fluid flow to both sides, and flow to the flow guide hole opened, reduce the stagnation zone, optimize fluid flow direction, and the drag reduction hole of water drop shape can reduce the resistance of fluid, reduce the generation of vortex, and reduce local resistance, make the flow velocity distribution more uniform, avoid fluid frequently changing direction, improve the heat exchange area, guarantee column tube heat exchanger heat exchange efficiency.