A kind of fine classification sieve
Technical field
The utility model relates generally to the sizing screening equipment of a kind of feed, food, chemical industry, medicine and other fields, relates in particular to ultra micro dressing sieve optional equipment.
Background technology
In industry production process such as feed, food, chemical industry, medicine, sizing screening equipment is a kind of equipment commonly used, is mainly used in the screening and the classification of granular material or particulate material, and common have rotary flat sieve, high frequency shale shaker, a winnowing machine etc.Wherein: rotary flat sieve comprise frame, with the sieve nest that frame is connected by suspension arrangement, described sieve nest comprises sieve ship assembly, sieve nest underframe; Be set with drive unit on the sieve nest underframe, drive unit comprises drive system and eccentric shaft; Sieve ship assembly left end and eccentric shaft flexibly connect, and sieve ship assembly right-hand member is connected with the sieve nest underframe by flexible supporting frames; Sieve ship assembly comprises sieve outboard frame, interval box, screen frame, top cover, on the described top cover charging aperture is set, and sieve outboard frame bottom is provided with discharging opening.The relative horizontal plane of sieve ship assembly is downward-sloping to material outlet by material inlet.During horizontal screen work, drive unit drives eccentric shaft and rotates, and eccentric shaft drives whole sieve nest and does eccentric motion.Material enters in the sieve nest from charging aperture, move in a circle down at the sieve nest feed end, be evenly distributed in rapidly on the whole compass screen surface width, and produce classification automatically, thereby the less material of dynamics is sieved rapidly and enter material outlet, form fine grain discharging.Can not pass screen cloth on the bigger screen cloth that then arrives nethermost screen frame of the particle that has and enter another material outlet in the sieve ship assembly, form more fine grain discharging, thereby reach the effect of gradation sizing.This mechanism makes small particles material be close to compass screen surface all the time, and raw material is crossed detailed rules and regulations and then cause the obstruction of compass screen surface easily in the industry production process, thereby has a strong impact on screening effect, is unfavorable for the purity of feed effect, food security or medicine etc.
The utility model content
The utility model provides a kind of classifying equipoment that improves the screening efficiency and the fineness of classifying screen by the vibration force that increases the compass screen surface particulate material.
The utility model purpose is achieved in that a kind of fine classification sieve, comprises sieve nest, frame, and described sieve nest comprises sieve ship assembly and sieve nest underframe; Be connected by suspension arrangement between sieve nest underframe and the frame, be set with drive unit on the sieve nest underframe, described drive unit comprises transmission system and the eccentric shaft that is in transmission connection with transmission system; Sieve ship assembly is provided with charging aperture and discharging opening, is fixed with vibration source on the described sieve ship assembly, and the below of sieve ship assembly is elasticly connected with the inertia link by shock preventing device; One end of described inertia link and eccentric shaft flexibly connect, and the other end of inertia link is connected with the sieve nest underframe by flexible supporting frames.
The utility model passes through to adopt the sieve nest underframe of unsettled design with the unsettled setting of whole sieve ship assembly, cooperate eccentric shaft and flexible supporting frames that inertia link and sieve ship assembly are sieved, the vibration source that on sieve ship assembly, is provided with, make material in sieve ship assembly, produce up-down vibration simultaneously, thereby realize before and after material is in the sieve ship, up and down, side-to-side movement, make material be not easy to make screen cloth to stop up, can reach the purpose of accurate screening by separating after the accurate classification of fineness requirement simultaneously.Adopt shock preventing device and inertia link to adopt flexible supporting frames to be connected between sieve ship assembly and the inertia link to have guaranteed that the sieve boatman does acutely and frame is steady with eccentric shaft, the vibration that plane transmission inertia force can be seesawed simultaneously, eccentric shaft mechanical force, vibrating motor produces passes to the sieve ship in the sieve ship assembly, guarantee the optimally sized of material in the screen cloth of sieve ship, can make particle by thickness grading, by finished product and impurity classification, grade by weight.The utility model can be used for powder classification in feed, food, chemical industry, the pharmaceuticals industry.
As improvement of the present utility model, described sieve ship assembly comprises the sieve ship and drops down plate, drops down plate and fixedlys connected with the inertia link, drops down between plate and the sieve ship to be tightly connected by the envelope band that is flexible coupling.Dropping down plate can make material descend along dropping down plate, flow to discharging opening, because stopping of the envelope band that is flexible coupling arranged, material can airborne dust, can be sealed in sieve ship and dropping down between the plate, in addition, the sieve ship in the sieve ship assembly with drop down plate split combination and solved original sieve ship under the effect of vibrating motor, resonance and noise that the large-area metal board plane that causes brings.
Described vibration source can be arranged on 1/3~1/5 place and close material inlet one end of the sieve ship length overall in the described sieve ship assembly; The sieve ship left and right sides is located or be arranged on to vibration source in the middle of also can being arranged on the sieve boat bottom.Can obtain to vibrate preferably separating effect, sieve aperture is difficult for stopping up.
For making the sieve ship assembly can excellent support, between inertia link and sieve nest underframe, balance can be set and prop up thick stick, described balance is propped up thick stick and is arranged on eccentric shaft one side, and two ends are hinged with inertia link and sieve nest underframe respectively up and down for it.
For avoiding the sieve pore blockade on the screen cloth, two-layer screen cloth up and down is set in the described sieve ship, be divided into some grids between the described two-layer screen cloth, be provided with cleaning piece or cleaning ball in the grid.When sieve ship when vibration, cleaning piece or cleaning ball roll, vibrate the cleaning sieve aperture back and forth, push and sieve being blocked in material on the sieve aperture, or break away from sieve aperture, and vibration screening makes sieve aperture clear and coherent again.
Described flexible supporting frames can be eccentric connecting axle, active link, cylinder column link or board-like column link.Above-mentioned several structure all has advantage simple in structure, easily manufactured.
Description of drawings
Fig. 1, the utility model structural representation;
Fig. 2, the left view of Fig. 1;
Fig. 3, inertia link planar structure schematic diagram;
Fig. 4, a kind of structural representation of sieve ship assembly;
Fig. 5, another structural representation of sieve ship assembly;
Fig. 6~Fig. 8, elasticity link structure embodiment schematic diagram;
The specific embodiment
Further specify the utility model below in conjunction with accompanying drawing.
As shown in the figure, for a kind of fine classification sieve, comprise sieve nest, frame 7, described sieve nest is connected by suspension arrangement 8 with frame 7, and described sieve nest comprises sieve ship assembly 10 and sieve nest underframe 3; Be set with drive unit 2 on the sieve nest underframe 3, described drive unit 2 comprises transmission system and the eccentric shaft 5 that is connected with transmission system; Sieve ship assembly 10 is provided with charging aperture 9 and discharging opening 14, is fixed with vibration source 12 on the described sieve ship assembly 10, is fixed with vibration source 12 on the described sieve ship assembly 10, and the below of sieve ship assembly 10 is elasticly connected with inertia link 13 by shock preventing device 6; One end of inertia link 13 and described eccentric shaft 5 flexibly connect, and the other end of inertia link 13 is connected with sieve nest underframe 3 by flexible supporting frames 1.Described sieve ship assembly 10 can be as shown in Figure 4, comprise sieve ship 11 and drop down plate 15, and the described plate 15 that drops down is fixedlyed connected with inertia link 13, and by the envelope that is flexible coupling be with 16 with sieve ship 11 and be tightly connected.The dust of raising out when the envelope that is flexible coupling does not release screenings to drop down plate and screen with 16 is sealed in the sieve boat bottom.From charging aperture 30 raw material is sent into sieve ship 11, screenings drops down plate 15 sends sieve ship from discharging opening 14 with finished product under the effect that plane transmission and eccentric shaft seesaw.Dropping down plate 15, can to solve metallic plate excessive, resonance that brings during dither and noise phenomenon.
Sieve ship assembly also can be as shown in Figure 5, and the sealing of sieve boat bottom self forms the plate of the material trickling that can hold after sieving.
Described vibration source 12 is arranged on 1/3rd places or 1/5th places of sieve ship 11 length overalls, near charging aperture 9 one ends.Vibration source 12 also can be arranged on place in the middle of sieve ship 11 bottoms; Vibration source can be one or more, front and back arrange or about arrange, in the same way or transmission in opposite directions, its installation site can be on sieve ship 11 both sides or bottom.
Two- layer screen cloth 1101,1102 up and down is set in the described sieve ship 11, be separated into some grids between the two- layer screen cloth 1101 and 1102, be provided with cleaning piece or cleaning ball 1103 in each grid, under the effect of three power, before and after cleaning piece or cleaning ball 1103 are done, up and down, about, thereby the plane rotates and constantly scrubs sieve aperture, and the screen cloth frictional cleaning is clean.
Also be provided with balance pole 11 between inertia link 13 and the sieve nest underframe 3, described balance is propped up thick stick 11 and is arranged on eccentric shaft 5 one sides, and it is hinged respectively and between inertia link 13 and the sieve nest underframe 3 at two ends up and down.
Described flexible supporting frames 1 can have various ways, cylinder column link as shown in Figure 6 or board-like column link, and at this moment, fixedly connected with sieve bilge frame 4 with inertia link 13 respectively in the two ends up and down of flexible supporting frames 1; Also can be described eccentric connecting axle of Fig. 7 or active link shown in Figure 8, at this moment, the two ends up and down of flexible supporting frames 1 are rotationally connected with inertia link 13 and sieve bilge frame 4 respectively.