49results about How to "Reduce blocking area" patented technology

The invention relates to a preparation method of high-elasticity, corrosion-resistant and wear-resistant Cu-Ni-Sn alloy. The Cu-Ni-Sn multi-element alloy is obtained through vacuum induction melting or covering protection type non-vacuum smelting. In the casting forming process, electromagnetic stirring is applied until alloy liquid is complete solidified, and then the as-cast alloy is subjected to homogenization annealing, hot rolling and cogging, solid solution treatment, cold deformation, spinodal decomposition and other processes. The preparation method of the Cu-Ni-Sn alloy is capable ofrefining crystalline grains, reducing dendritic spacing and eliminating alloy microscopic and macroscopic structure and component segregation, provides implementation conditions for follow-up alloy plastic processing, spinodal decomposition and other processes, and has the beneficial effects that energy is saved, the production efficiency is improved, the service life of the alloy is prolonged, and the production cost is reduced.

An aspirator system for inflating an inflatable device includes an aspirator body and a plurality of nozzles. The aspirator body has an inner surface and an outer surface that each extend between a first end and a second end along a central longitudinal axis. The aspirator body defines a distribution channel that is disposed between the inner surface and the outer surface. The plurality of nozzles are fluidly connected to the distribution channel and extend inwardly from the inner surface towards but are spaced apart from the central longitudinal axis.

The invention relates to the technical field of environmental protection, in particular to an ammonia spraying device and a flue gas denitration device. The ammonia spraying device comprises an ammonia spraying pipeline suitable for being horizontally arranged in a flue, the cross section of the ammonia spraying pipeline being rectangular, the side, perpendicular to the flowing direction of flue gas in the flue, of the cross section of the ammonia spraying pipeline being a short side, the side parallel to the flowing direction of flue gas in the flue being a long side, and the surface, facing the flowing direction of the flue gas, of the ammonia spraying pipeline being a windward side; a flow guide part arranged on the windward side of the ammonia spraying pipeline; and a nozzle arranged on the ammonia spraying pipeline. On the premise that the length of the ammonia spraying pipeline is not changed, the projection area of the ammonia spraying pipeline can be greatly reduced, the blocking area for flue gas is reduced, the deamination efficiency of the system is ensured, the resistance of the system is effectively reduced, the mass transfer path and area are increased, and the deamination efficiency is improved. The flow guide part is arranged on the windward side of the ammonia spraying pipeline, so that the flowing of flue gas can be guided, the flue gas is prevented from directly colliding with the windward side of the ammonia spraying pipeline, and the abrasion of the windward side can be reduced.

The invention relates to a pipeline part, and in particular relates to a copper plastic compound pipe. The invention provides a copper plastic compound pipe which is provided with a first open end and a second open end. The copper plastic compound pipe comprises a copper pipe layer and a plastic pipe layer positioned at the interior of the copper pipe layer, and the part, positioned at the first open end, of the plastic pipe layer radially packages the end of the copper pipe layer so as to form a package part; the radial edge of the package part forms a reentry which extends toward the second open end, and the inner wall of the reentry is fitly fixed on the outer wall of the copper pipe layer; and the inner wall of the reentry is fitly fixed on the outer wall of the copper pipe layer so as to prevent the copper pipe layer of the molded copper plastic compound pipe from shifting axially, so that the fixed effect is good, thereby preventing the leakage caused by the looseness of the copper pipe layer and the plastic pipe layer.

The invention relates to the technical field of daily electric appliances, in particular to a range hood and a motor support thereof. The motor support comprises a fixed part and a plurality of supporting legs, wherein the fixed part is of an annular structure, and the fixed part is provided with a motor fixing hole; the motor fixing hole is used for fixing a motor; at least one supporting leg comprises a mounting section and a flow guide avoiding section; the mounting section is fixedly connected with a volute, and the flow guide avoiding section is of a flat plate-shaped structure, and the included angle between the plane where the flow guide avoiding section is located and the axial direction of the motor fixing hole is alpha, wherein alpha is greater than 0 degree and smaller than 90 degrees; and the two opposite ends of the flow guide avoiding section are fixedly connected with the mounting section and the fixed part respectively. The motor support provided by the invention achieves the purpose of fixing the motor, the resistance and the blocking area of the motor support on the gas are relatively small, the noise generated by the gas is small, and the air inlet amount is relatively large.

The invention relates to a firefighting bucket water drain valve which comprises a valve seat, a plurality of guide rods fixed on the valve seat, a valve element fixed on the guide rods, a valve body,a compression spring, a water drain rope connected with the valve body and a motor capable of driving the water drain rope to go up and down, wherein the valve seat is mounted on a water drain opening of a firefighting bucket; the valve body is arranged on the valve element in a sleeving manner and can move along the guide rods; the compression spring is arranged on the guide rods in a sleeving manner and always applies force towards the valve seat to the valve body; the inner walls of the valve body always fits the side walls of the valve element to form sealing; openings are formed in the tops and bottoms of the valve seat and the valve body; the bottom of the valve body can completely cling to the valve seat to form a sealing ring; and the opening in the valve seat is positioned in thesealing ring. The firefighting bucket water drain valve can be repeatedly opened and closed to drain water and is large in water drain quantity, simple in structure, low in cost and convenient to mount; and the electric current required by the motor is lower.

The invention relates to a central motor for an electric power-assisted bicycle. The central motor comprises a shell and a radiating net. The top end of the shell is connected with a top cover. Fastening bolts are installed on the surfaces of the front end and the rear end of the top cover. A first shaft rod is inserted into the top cover in a penetrating manner. The bottom end of the first shaftrod is connected with a lantern ring located under the shell. The heat dissipation net is embedded in the outer surface of the bottom of the shell. A first notch is formed in the surface of a carryingplate. An inner plate is installed in the carrying plate. A protruding rod is welded to the lower surface of the carrying plate. A groove is formed in the upper surface of the bottom plate. A third through hole corresponding to the first through hole in position is formed in the inner side of a second notch. The diameter of the first through hole is the same as that of the third through hole. According to the invention, it is convenient to disassemble the central motor and maintain internal parts, heat dissipation is convenient, and the bearing plate is high in rigidity and convenient to use.

The invention relates to the technical field of purification, dust removal or filtration, in particular to a filter assembly and a filter device. The filter assembly comprises a first filter component, two second filter components and a shielding component, wherein the two first filter components are arranged at intervals to form a first gap, the first filter component and the second filter components are arranged in dislocation so that the fluid flowing out of the first gap passes through the second filter components, and the shielding component is arranged on the second filter components, opposite to the first gap, so that the fluid passing through the gap completely hits the shielding component to replace the flow direction, thereby reducing the risk of motor damage caused by the blockage of the filter assembly and automatically clearing the blocked filter component.

The invention belongs to the field of household appliances, and particularly relates to a self-descaled household electric water heater. The self-descaled household electric water heater comprises a water storage tank, wherein the lower end of the water storage tank fixedly communicates with a water outlet pipe, and an electric heating pipe is arranged right over the water outlet pipe; a mountingbase is fixedly connected to the side wall of the water storage tank, a rotating ring is rotationally connected to the side wall of the mounting base, and the rotating ring coaxially and fixedly sleeves the electric heating pipe; a fan impeller is rotationally connected to the inner side wall of the water outlet pipe, a rotating shaft is coaxially and fixedly connected to the upper end of the fanimpeller, and the upper end of the rotating shaft is arranged extending into the water storage tank; and a crown gear ring is rotationally connected to the inner bottom surface of the water storage tank, and a tooth groove matched with the crown tooth ring is formed in the side wall of the outer ring of the rotating ring. According to the self-descaled household electric water heater, different side faces of the electric heating pipe are repeatedly opposite to the water flow direction, so that uniform and effective scouring of all positions of the electric heating pipe is achieved, the safetyproblems of short circuit burnout and the like caused by non-uniform heat conduction of all positions of the surface of the electric heating pipe caused by non-uniform scale thickness are avoided, andthe descaling effect is good.

The invention relates to the technical field of marine engineering, and discloses a marine drilling tool capable of continuously working. The marine drilling tool capable of continuously working comprises a drill bit, wherein the outer edge of the drill bit is fixedly equipped with a fixed sheet; the outer wall of the fixed sheet is provided with first threaded teeth; and the inner wall of the fixed sheet is movably connected to a first movable rod. Structure components of a fixed part, the fixed sheet, a limiting block and the first movable rod are adopted, so that the diameter of the drill bit can be regulated according to a resistance value of seawater in an equipment dropping process, and therefore, the resistance value in the dropping process is reduced; a hollow-out type design is adopted inside the drilling tool, so that resistance area is reduced in a using process, and therefore, the effects of greater diving depth and higher diving speed are achieved, working depth of the tool is effectively increased; and moreover, the maximum diameter value can be fitted to the drilling tool, so that seamless butt-joint with the drilling tool can be achieved in the using process, and therefore, sludge does not enter the tool in the using process of the tool.

A step for a dump truck (1), comprising: a third step (20) tilted forward as the third step extends from above the vehicle body (4) downward; and a second step (19) provided to the lower end of the third step (20) and tilted inward from the outside of the vehicle body (4) as the second step (19) extends from above downward. The position in height of the lower part of the outer side of the second step (19) is set to be higher than the position in height of the lower part of the inner side of the second step (19).

A LiDAR sensing device may include: a sensing light source unit configured to radiate sensing light; a light transmitting reflector configured to reflect the sensing light radiated from the sensing light source unit; a scanner unit configured to reflect the sensing light reflected from the light transmitting reflector into a target, and to reflect incident light reflected from the target; a light receiving lens configured to pass the incident light reflected from the scanner unit, and integrated with the light transmitting reflector; a light receiving reflector configured to reflect the incident light passing through the light receiving lens; and an optical detecting unit into which the incident light reflected from the light receiving reflector is incident.