JP2001276739A - Screen classifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a screen classifier which can screen crushed stones or the like in large quantities at high speeds. SOLUTION: An upper side moving part 4' of an endless turning screen net 4 is moved between both side plates 3, 3 supported on a machine base 1 through a spring 2, while a plurality of rollers 5 for supporting the underside of the moving part 4' are bridged between the plates 3, 3. An eccentrically/ turning vibrator 6 is provided near one of the opposite ends of the plate 3. In a discharge hopper 7, minus mesh materials of the moving part 4' can be discharged sidewards from a portion between the upper and lower moving parts 4', while oversize materials can be discharged from the part 4' on one of the ends of the plate 3, and raw materials are supplied onto the other end of the part 4' on the other end of the part 3. The vibrator 6 is disposed in such a manner that an eccentric bearing 9 of an eccentrically/turning axis 8 of the vibrator 6 is provided on the spring 2 provided on the base 1 on each side of the end of the plates 3, and a center bearing 10 of the axis 8 is provided for the plate 3, while a drive device 11 is provided to rotate the axis 8 about its eccentric axis (c) upwards from the other end and further from above to one end thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrating sieve for crushed stones and the like.

[0002]

2. Description of the Related Art In a conventional vibrating sieving machine, a vibrating machine is provided on the raw material supply side at the starting end of both side plates, and the amplitude T at the starting end is increased (FIG. 5). , The large and small raw materials are not delicately separated at the start end but reach the end end as it is, so that it was difficult to improve the classification efficiency by effective vibration.

[0003]

According to the present invention, the raw material crushed stones are widely dispersed on the sieve mesh by the minute vibration of the starting end, the particles are delicately separated, and the crushed stone is sieved sufficiently and in a short time by the large amplitude of the end, and An object of the present invention is to obtain a vibrating sieve having good sieving efficiency.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention transfers an upper transition portion of an endless rotary sieve mesh between both side plates supported by a machine through an elastic machine. A plurality of lower receiving rollers are provided between the two side plates, an eccentric rotary vibrator is provided on one end side of the both side plates, and the lower sieve discharge hopper of the upper transition portion is laterally located between the upper and lower transition portions. Discharging the raw material from the sieve from the one end side of the upper transition part and supplying the raw material to the upper part on the other end side; The eccentric bearing of the eccentric rotation shaft is provided on the machine provided on the base, the center bearing of the eccentric rotation shaft is provided on both side plates, and the eccentric rotation shaft is upward from the other end side around the eccentric axis line, Further, the above-mentioned other end side of the sieving machine both side plates, which is provided with a driving device for rotating to the one end side from above, is provided on a machine base by an elastic machine. The endless rotary screen sieve according to the first or second invention, wherein the lower end of the weft of the endless rotary screen net of the screener according to the first invention is integrally connected to the upper part of the warp vertically. The sieving machine according to any one of the first to third inventions, wherein the rotation speed of the net can be changed.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The both side plates 3, 3 are arranged on the upper portion of the machine base 1, and the upper portions of the starting ends of the both side plates 3, 3 are connected by a leakage prevention plate 3 'to form a flat U-shaped sieve frame.

A plurality of screen bottom receiving rollers 5 are movably mounted at a pitch of 150 mm on the upper portion between the side plates 3 and 3, and the upper transition portion 4 ′ of the endless rotating screen 4 is mounted on the rollers 5. The driving roller 14 of the sieve mesh 4 is provided at the starting end (the other end) between the side plates 3 and 3, and the driven roller 15 of the sieve mesh 4 is provided at the end (one end). , 15 on a substantially horizontal level.

[0007] The sieve screen 4 bypassing the drive roller 14
Circulates back to the drive roller 14 via the lower part of the machine 1 by four guide rollers 16, and the drive roller 14 is driven by an output sprocket 17 provided on an output shaft of a variable speed motor 17 provided on the upper part of the machine 1. And the input sprocket 14 'provided on the drive roller 14 is turned around by rotating the endless chain 18, and the sieve net 4 is turned at 42 to 64 m / min. Further, the transfer speed of the sieve 4 is adjusted by the variable speed motor 17 so as to correspond to the humidity of the input raw material.

As shown in FIG. 1, a small base 19 is provided on the outer side of the upper end of the side plates 3 and 3 at the starting end side. 2 ', or both sides 3 and 3 are supported by pillow blocks and pins 19' provided on the upper surface of the small base 19, and on the machine base 1 by wheels (not shown) provided on the lower surface. Can be slightly slidably supported.

A pillow block bearing 9 is disposed in the middle of the outer end of each of the side plates 3 and 3, and a coil spring is formed between a bearing 1 ′ provided on the machine base 1 and the bearing 9. 2, the bearing 9 supports a protruding portion 8 ′ centered on an eccentric axis c protruding from both ends of the eccentric rotation shaft 8, and the center line c ′ of the eccentric rotation shaft 8 is centered. Bearings 10 and 10 are provided on both side plates 3 and 3, and an eccentric rotation shaft 8 is provided between both side plates 3 and 3. A pulley 20 is provided on one protruding portion 8 ′ and an output shaft of the driving motor 21 is provided on the output shaft. The endless belt 23 is hung between the small-diameter pulley 22 provided, and the eccentric rotation shaft 8 is centered on the eccentric axis c from the start end side upward, from the upper end to the end side, from the end side to the lower side, and from the lower end to the start end side. As a result, eccentric rotation vibration is applied to both side plates 3, 3, whereby the eccentric rotation vibrator 6 can be obtained.

The drive motor 21 of the vibrator 6 is provided on a vertically movable base plate 25 whose terminal end is supported by a pin 24 on the machine base 1, and the terminal end side of the base plate 25 is supported by a coil spring 26. The vibration applied to the drive motor 21 is reduced, and the eccentric
Of the driving device 11.

A raw material supply hopper 27 is provided just above the start end of the upper transition section 4 ', and a sieve discharge hopper 7 is provided between the upper transition section 4' and the lower transition section 4 ". The hopper 7 can discharge to the side of the machine 1, and the screen is discharged from the end of the upper transition portion 4 ′ to the outside through the discharge hopper 28.

The endless rotary screen 4 is made of synthetic resin strips 12 and 13 shown in FIG. 3 enlarged in FIG. 3 and has a mesh of 3 mm or less and is made of crushed stone having relatively small particles. Can be appropriately selected as long as the endless rotary screen 4 is formed.

A core wire 12 'is buried in the weft 12, and the weft 12 and the warp 13 are integrally connected in two upper and lower stages, so that when the crushed stone passes, the wefts 12, 12 and the warp 1 are connected.
Since the contact between the crushed stones and the crushed stones 3 and 13 is performed twice in the vertical direction, the speed at which the net 4 of the upper transition portion 4 'passes from above to below is high. That is, the part (a)-(a) is the first contact point, and the lower part (b)-(b) is the next contact point. Therefore, the frictional resistance is also divided into two, and the frictional resistance quickly passes under the net, and the clogging is also caused. Can be prevented.

As shown in FIG. 4, the upper transition portion 4 'vibrates slightly on the start end side, so that the feed material is diffused on the screen 4'.
It is classified into large, medium and small particles, and delicately classified toward the end. Then, the lower surface receiving roller 5 caused by the vibrations of the lower and upper side plates 3 and 3 is sieved quickly from the bottom to the upper side, and the upper and lower amplitudes T increase toward the end (FIG. 4).
Shows the state).

Reference numeral 29 in the drawing denotes a below-screen discharge scraper provided in a below-screen discharge hopper, 30 denotes a rotating shaft of the scraper 29, 31 denotes a driving motor of the rotating shaft 30, 3
Reference numeral 2 denotes an endless chain that supports both ends of the scraper, reference numeral 33 denotes a driving sprocket for driving the chain 32, and reference numeral 34 denotes a material transport conveyor.

[0016]

Since the present invention is constructed as described above, crushed stones (crushed stones such as limestone, sandstone, basalt, andesite, and quartzite) have a small amplitude T at the beginning of the upper transition portion of the endless rotary sieve mesh. Therefore, the crushed stone material spreads widely on the sieve net over a sufficient time, and the amplitude gradually increases toward the terminal end side. By tapping from below, there is an effect that a large amount of sieving can be performed efficiently and at high speed. .

Further, since the wefts of the sieve mesh are provided stepwise on the warp, there is an effect that the raw material can quickly pass through the sieve mesh from top to bottom.

Further, since the transfer speed of the endless rotary screen is variable, there is an effect that the screen can be appropriately screened according to the humidity of the raw material.

[Brief description of the drawings]

FIG. 1 is a side view of a sieve of the present invention.

FIG. 2 is a longitudinal sectional view of a starting end of FIG. 1;

FIG. 3 is a partially enlarged view of a sieve screen.

FIG. 4 is an explanatory diagram of a vibration state of a sieve net.

FIG. 5 is an explanatory view of a conventional vibration state.

FIG. 6 is a side view of a conventional sieving machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine base 2, 2 'Ammunition 3 Side plate 4 Endless rotating sieve net 4' Upper transition part 4 "Lower transition part 5 Lower receiving roller 6 Eccentric rotation vibrator 7 Under-screen discharge hopper 8 Eccentric rotation shaft 9 Eccentric bearing 10 Center bearing c Eccentric axis 11 Drive device 12 Weft 13 Trajectory

Claims (4)

[Claims] An upper transition portion of an endless rotary sieve mesh is transferred between both side plates supported by a machine via an elastic machine, and a plurality of lower surface receiving rollers of the transition portion are erected between the both side plates. An eccentric rotary vibrator is provided on one end side of the plate, and the lower sieving discharge hopper of the upper transition portion is laterally discharged from between the upper and lower transition portions, and the upper portion of the upper transition portion is sifted over the sieve. Discharging from one end side and supplying the raw material to the upper part on the other end side, and the eccentric rotation vibrator is eccentric on the eccentric rotation shaft on a machine provided on the machine stand on both outer sides on one end side of both side plates A bearing is provided, a center bearing of an eccentric rotation shaft is provided on both side plates, and a drive device for rotating the eccentric rotation shaft upward from the other end side around the eccentric axis line and further from the upper side to one end side is provided. Sieving machine. 2. The sieving machine according to claim 1, wherein said other end portions of both side plates are supported on a machine base by an elastic machine. 3. The sieving machine according to claim 1, wherein the lower part of the weft of the endless rotary sieve mesh is integrally connected to the upper part of the warp vertically. 4. The sieving machine according to claim 1, wherein the rotating speed of the endless rotating screen is variable.