4results about How to "Wide performance range" patented technology

This utility model relates to the technical field of dust removal equipment, and particularly to a dust suppression device for construction sites, comprising a mobile chassis, a lifting rod, an atomizing nozzle, a high-pressure water pump, a connecting hose, and a water inlet pipe. The lifting rod is mounted on the mobile chassis. The atomizing nozzle is installed at the top of the lifting end of the lifting rod, rising or falling with the top of the lifting end. The high-pressure water pump is mounted on the mobile chassis. The connecting hose connects the atomizing nozzle to the outlet of the high-pressure water pump. The water inlet pipe connects to the inlet of the high-pressure water pump. This utility model, by installing a lifting rod on a mobile chassis and mounting the atomizing nozzle at the top of the lifting end of the lifting rod, allows the atomizing nozzle to rise or fall with the lifting end of the lifting rod, thereby adjusting the height of the atomizing nozzle. This enables the atomizing nozzle to perform dust suppression not only at higher elevations but also at different heights.

The utility model relates to the technical field of wire twisting, in particular to a wire twisting distance adjusting device, which comprises a base and two fixing plates, the two fixing plates are symmetrically fixed on the base, a first threaded rod penetrates through the two fixing plates and is rotatably arranged on the two fixing plates, a driving mechanism is fixed at one end of the first threaded rod, and a second threaded rod is fixed at the other end of the first threaded rod. The driving mechanism is fixed to the base, two connecting plates are symmetrically fixed to the two fixing plates jointly, a limiting plate is arranged on the two connecting plates, a sliding limiting mechanism is fixed between the limiting plate and each connecting plate jointly, the limiting plate is arranged on the first threaded rod in a threaded and sleeving mode, and the sliding limiting mechanism is arranged on the sliding limiting mechanism. A first clamping block is fixed to the limiting plate, a second clamping block is hinged to the first clamping block, and grooves are formed in the second clamping block and the first clamping block. When the device is used, the position of the stranded wire can be adjusted, so that the performance range of the steel wire rope during processing is wider.

The present invention discloses a double-suction fully symmetrical multistage pump, comprising a secondary impeller, a double-suction impeller and a double-suction pump body. The double-suction pump body is arranged outside the double-suction impeller, and the double-suction impeller is a completely symmetrical structure. The double-suction pump body is located on the coaxial line of the double-suction impeller, thereby providing a double-suction fully symmetrical multistage pump, thereby realizing a multi-stage double-suction pump is conveniently formed on the premise of making maximum use of existing single-suction multistage pump parts, thereby multiplying the flow rate of the pump and expanding the performance range of the pump; since the first-stage impeller, the secondary impeller and the double-suction impeller are completely symmetrically arranged, the axial force is completely balanced, and the theoretical axial force is zero; the flow area of ​​the first-stage impeller is larger than that of the secondary impeller, thereby improving the cavitation performance of the pump; the use of the double-suction impeller and the double-suction pump body is convenient for liquid collection and convergence, thereby improving the hydraulic efficiency of the pump; the double-axle extension scheme is adopted, and it can be driven from either end, thereby meeting the diverse requirements of pump installation.

The invention discloses a high-pressure and high-speed multi-stage centrifugal pump capable of replacing a plunger pump, and relates to the technical field of centrifugal pumps, the high-pressure and high-speed multi-stage centrifugal pump comprises a pump body, the pump body comprises a suction section, a discharge section, a middle section and a plurality of pull rods, the middle section is located between the suction section and the discharge section, and the suction section, the middle section and the discharge section are connected through the pull rods; the centrifugal pump further comprises guide vanes, a bearing seat, a pump shaft, a plurality of impeller assemblies, a balance assembly and a mechanical sealing assembly, the guide vanes are installed on the water inlet face of each middle section in the pump body, the balance assemblies are installed in the discharge section, and the bearing seat and the mechanical sealing assembly are both installed at one end of the discharge section. The mechanical sealing assembly is arranged between the discharge section and the bearing seat, a sliding bearing is installed in a cavity of the suction section, a double-row rolling bearing is installed in the bearing seat, and the pump shaft is installed in the sliding bearing and the double-row rolling bearing.