CN2043138U - Automatic vibrating-screening machine - Google Patents

Abstract

The connection between the sieve bed and the frame of the utility model adopts a parallel four-bar linkage mechanism and a spiral suspension spring, which properly increases the vibration frequency of the sieve bed and improves the vibration direction, so that the crops on the sieve can move forward in leaps and bounds, and an automatic scraper is provided under the sieve. device, and the crank is used instead of the crankshaft to make the whole machine compact in structure, safe and reliable, low in vibration and noise, strong in screening capacity and high in production efficiency;

This machine is suitable for sifting mixtures of small particles, especially tea sifting and mineral sieving.

Description

Automatic vibrating-screening machine

The utility model relates to granule mixture screening plant, particularly machine for processing tea.

At present the screen(ing) machine of trembling of sorting tealeaves generally adopts as shown in Figure 1 structure.Sifting bed (screen cloth is housed) (3) is supported by four the flat spring steel plates (2) perpendicular to ground, and becomes 5 ° of inclinations with ground.The off-centre of bent axle (6) is 20～25 millimeters, and rotational speed N is per minute 270 right side of turning left, and drives sifting bed (3) and does oblique shake.

There is following point in the screen(ing) machine of trembling of this kind structure:

1. mixture such as tealeaves is only done one and is advanced to move back Horizon and slide and move on screen cloth, and sieving capacity is low;

2. sieve screen apertures is plugged easily, needs manually to scrape net with scraper plate, and labour intensity is big, and Netease is scratched;

3. bent axle processing difficulties, the sliding bearing above it is easy to wear, and when big gap, complete machine oscillation is big, and noise is big;

4. the flat spring steel plate ruptures easily.

The utility model purpose: design a kind of simple and reliable for structurely, sieving capacity is strong, and efficient is high trembles screen(ing) machine automatically.

The purpose of this utility model realizes as follows:

1. sifting bed (in establish screen cloth) is horizontal positioned, off the netly is provided with the scraper plate group who fuses with shelf, drives shelf by crank, makes the scraper plate group make horizontal reciprocating movement;

2. sifting bed is linked to each other with frame (making connecting rod become 10 °～25 ° inclinations with ground) by parallel four-bar linkage, relies on some helical springs to be supported;

3. the crank of control sifting bed motion drives the sifting bed forced vibration with the speed rotation that per minute 500 turns left right, and amplitude is 10～14 millimeters;

Through above-mentioned improvement, the utility model is reached:

1. the mixture on the screen cloth advances as great-jump-forward, increases the chance that tiny mixture passes sieve aperture, to improve screening quality and productivity ratio;

2. adopt and scrape sieve automatically, need not artificial help;

3. replace the flat spring steel plate with helical spring, easily make, can not produce fracture;

4. replace bent axle with crank, adopt ball bearing on the axle, the life-span is long, stable working, and noise is low.

Below in conjunction with embodiment, structure of the present utility model is described further:

Fig. 2 is for trembling the screen(ing) machine schematic diagram automatically.

Sifting bed (3) (is marked with bc on the figure

), frame (1) (is marked with ad on the figure

) and connecting rod ab, cd forms a parallel four-bar linkage, when crank (6) rotates (by driven by motor, do not draw on the figure) time, drive the bc bar by connecting rod (5), make it translation, so sifting bed (interior dress screen cloth) is gone up every bit and is all done to become 65 °～80 ° little amplitudes (10～14 millimeters) to vibrate with ground, when material is put into above the bed left end, will on screen cloth, jump to the right, come out in right exit at last, and the fines under the sieve being come out at bed end right-hand member off the net simultaneously---this is the screening motion.

Scrape sieve motion (clear net motion), when crank (7) rotates (by driven by motor, do not draw on the figure) time, (the shelf right-hand member has slotted hole to crank-pin drive scraper plate group's (8) shelf (9), the hole is vertical with paper), make the scraper plate group make per minute and move back and forth for 2～3 times, thereby collided in the sideline on net bottom and the scraper plate, prick broken or release getting lodged in material on the mesh, reach mesh clearly.

Connecting rod ab and cd are the porose rod members of two ends, and two holes respectively are enclosed within on the fixed axis of sifting bed and frame, and in general sifting bed two sides respectively have two to get final product, if sifting bed is long, can respectively adorn three (uniform), but length equates the direction unanimity; The bed both sides are respectively adorned some of helical springs (being advisable with 8～14) and are heavily reached the inertia force of balance bed when vibrating with support bed.

The utility model is applicable to the screening of granule mixture, such as tealeaves screening, mineral screening etc.

Claims (2)

1, a kind of material screening equipment, the screen(ing) machine of trembling especially for tea dry sorting, has frame (1), sifting bed (3) and scraper plate (8) with spring (2) supporting, it is characterized in that: frame (1) adopts parallel four connecting rods (4) with the connection of sifting bed (3), is helical spring in order to the spring (2) that supports sifting bed (3).

2, the screen(ing) machine of trembling as claimed in claim 1 is characterized in that the connecting rod (4) and the angle of horizontal plane are 10 °～25 °.

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