3results about How to "Realize hierarchical screening" patented technology

The utility model discloses equipment for screening building materials in the technical field of building materials, which comprises a screening box, a screen mesh, a feed port, a first discharge port, a second discharge port, a supporting seat, a scraper mechanism and a vibrating mechanism, the feed port is arranged at the top of the screening box, the first discharge port is arranged on the side wall of the screening box, and the second discharge port is arranged on the side wall of the screening box. The second discharging port is formed in the bottom wall of the screening box, a cavity is formed in the screening box, the screen is arranged in the cavity, the feeding port, the first discharging port and the second discharging port are communicated through the cavity, the scraper mechanism comprises a scraper, a push rod and a power mechanism, and the power mechanism drives the scraper to move back and forth on the upper surface of the screen towards the first discharging port. Supporting legs are arranged at the bottom of the supporting seat, a cavity structure sleeved with the supporting legs is arranged at the top of the vibration mechanism body, the vibration mechanism is arranged at the bottom of the supporting seat, and a convex block of the vibration mechanism rotates to drive the screening box to vibrate up and down. The technical problems that a screen of an existing device is prone to being blocked, and the screening efficiency is low are solved.

The invention discloses a heavy metal cadmium low-accumulation wheat variety screening disc and a use method, and relates to the technical field of wheat screening. The device comprises a screening box, a screening barrel is rotationally installed in the screening box, filtering holes are formed in the screening barrel, a first gear is fixedly installed on the screening barrel, the first gear is meshed with a second gear, an output shaft of a driving motor is fixedly installed on the second gear, and a first transmission mechanism is arranged on the output shaft of the driving motor; the first transmission mechanism is used for driving the conveying shaft to rotate, and an output shaft of the driving motor is provided with a second transmission mechanism. According to the wheat seed screening device, the driving motor drives the screening barrel to rotate, meanwhile, wheat seeds are evenly scattered through the first transmission mechanism, the wheat seeds and the screening barrel rotate in the opposite direction, bran, dust and other impurities on the surfaces of the wheat seeds are effectively removed, and furthermore, a cam is driven by the second transmission mechanism to rotate, so that a first filter screen plate and a second filter screen plate vibrate; graded screening of the wheat seeds is achieved.

The utility model discloses a building sieve which comprises a shell, a fixing frame, a first sieve, a second sieve, a reciprocating screening mechanism and a tray, the fixing frame is placed at the upper end of the shell, the first sieve is arranged in the fixing frame, a first slot is formed in the inner wall of the shell and used for installing the second sieve, and a second slot is formed in the inner wall of the bottom and used for being connected with the slidable tray. The reciprocating screening mechanism is composed of a fixing frame, a cam, a driving motor and the like, the driving motor drives the cam to rotate, the fixing frame reciprocates on the shell, and meanwhile a vibration motor of the second screen enhances the screening effect. By means of the structure, the screen can efficiently screen building materials in a classified mode, materials with different particle sizes are effectively separated, the operation stability is guaranteed through the structural design of the screen, meanwhile, cleaning and maintaining are convenient, the screen can be widely applied to the fields of building construction, building material production and the like, and the screening efficiency and quality are improved.