JP2002301435A - Roll rotating siever - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of sieving by preventing clogging at a hopper chute and enabling sure sieving even when a large amount of stucky raw materials are charged on a roll rolling siever. SOLUTION: A frame 12 fitted with rollers 13 is installed to be slanted in the front-rear direction, knot parts 14 are formed separately in each roller 13, and a recessed part 31 is formed along the circumference in an optional knot part 14 of the roller 13. An edge part 31a and a round part 31 are formed at both ends of the recessed part. The edge part 31a is formed at the end of the recessed part when the roller 13 is rotated diagonally upward to the inclination direction of the frame 12, and the round part 31b is formed at the end of the recessed part when the roller 13 is rotated diagonally downward. When the rollers 13 are rotated diagonally upward, since the raw materials retained above the rollers 13 are crushed by the edge parts 31a of the recessed parts, the bridge phenomenon can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary sieving apparatus, and more particularly, to a rotary sieving apparatus used for highly adhesive raw materials.

[0002]

2. Description of the Related Art Raw materials such as ores and limestones are sieved after being mined, and a sieving apparatus with a rotary roll is sometimes used for sieving. This type of roll-rotating sieve device arranges a plurality of rollers rotatably between left and right frames, provides nodes at each roller, and rotates each roller by a driving mechanism, thereby removing a gap between the rollers. Smaller lumps are dropped from the gap, and lumps larger than the gap between the rollers are moved on the rollers and discharged to classify the raw material. Generally, this type of roll rotating sieve device is used in an inclined state, and drives the rotation direction of the knotted roller so as to be directed downward in order to flow the raw material downward.

[0003] However, in the case of a raw material containing a highly sticky material, even if the raw material is small in particle size, the raw materials may have a large lump due to the adhesive force in the process of classification by the sieve device having the above configuration. As a result, the raw material may become larger than the gap between the rollers, and may be discharged while rolling on the rollers. For this reason, the viscous object having a small particle shape and which should originally fall between the rollers is discharged from the sieving apparatus like the raw material having a large particle shape, and cannot be classified and classified.
As a result, the passage efficiency of the device is deteriorated.

[0004] In order to solve this problem, the applicant of the present invention has proposed in Japanese Patent Application Nos. 2000-357694 and 2000-357696 a roll-type sieving apparatus capable of separating a material having high tackiness from a material having low tackiness. are doing. However, as shown in FIGS. 7 and 8, when a large amount of the raw material 2 is supplied at once from above the roller 1 at the time of supplying the raw material, a bridge phenomenon occurs to the hopper chute 3 due to its own weight and viscosity, and as a result, Despite the rotation of the roller 1, the charged raw material 2 cannot be moved obliquely upward, and the raw material 2 stays on the roll-rotating sieve device, so that classification and classification cannot be performed.

[0005] Therefore, even when a large amount of highly viscous raw material is put into a roll-rotating sieve, a bridge phenomenon does not occur with respect to the hopper chute, and separation and classification can be reliably performed to improve the passage efficiency. A technical problem to be solved arises for improvement, and an object of the present invention is to solve this problem.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in order to achieve the above object. A plurality of rollers are rotatably arranged between left and right frames, and a joint is formed at each part of each roller. In the roll-rotating sieve device configured to rotate each roller by the driving mechanism, the left and right frames are provided to be inclined in the front-rear direction, and the rotation direction of the roller is set with respect to the inclination of the frame. A roll-rotating sieve device in which a forward / reverse drive can be performed so as to be inclined upward or downward and an arbitrary node of the roller is provided with a concave portion along a circumference, and provided at a node of the roller. In the recessed portion, a sharp portion is provided at the end of the recess when the roller rotates above the inclination of the frame, and a round portion is provided at the end of the recess when the roller rotates below the inclination of the frame. And there is provided a roll rotating sieve device.

[0007]

An embodiment of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 3 show a roll-rotating sieve device 11, and a frame 1 of the roll-rotating sieve device 11.
Reference numeral 2 denotes a front and rear frame 12a, 12b and a left and right frame 12c, 12d facing each other to form a rectangle, and a plurality of rollers 13, 13 ... rotatably arranged between the left and right frames 12c, 12d. , 13 and 13 are provided with circular nodes 14, 14.
3 are pivotally supported by bearings 15 such as bearings. For convenience of explanation, the frame on the right side of the drawing is referred to as a front frame 12a, and the frame on the right side in a plan view is referred to as a right frame 12d.

The frame 12 is inclined in the front-rear direction, and one end of the frame 12 at the front is a leg 16.
The rear side, which is the other end of the frame 12, is supported by legs 17, and the left and right frames 12c, 12c
The front side of d is installed at a lower position than the rear side. Although illustration is omitted, the front and rear legs 16 and 17 may be formed in a telescopic manner so that the inclination angle of the frame 12 can be adjusted according to the adhesiveness and density of the raw material.

On the other hand, one end of each of the rollers 13, 13,... Is projected from one of the right and left frames, for example, the right frame 12d, and sprockets 19, 19,. To connect. A bracket 21 is fixed to the frame 12, and a prime mover 2 such as a transmission motor or a hydraulic motor is mounted on a lower surface of the bracket 21.
2 and a drive mechanism 23 that transmits the rotational drive of the electric motor 22 to the respective sprockets 19 via the chain 20 and drives the respective rollers 13, 13 forwardly or reversely. is there. As will be described later, in normal times, the roller 13 is driven so that the rotation direction of the roller 13 is directed upward with respect to the inclination of the frame 12 (counterclockwise in FIGS. 2 and 3), and the drive mechanism 23 is driven. Is rotated in reverse, or the roller 13 is driven so that the rotation direction of the roller 13 is directed downward toward the inclination with respect to the inclination of the frame 12 (clockwise in FIGS. 2 and 3).

A hopper chute 25 is fixedly mounted on the upper portion of the frame 12.
5 and the frame 1 on the rear side
A crusher 26 is provided near the roller 2b, that is, above the roller 13 at the uppermost part of the slope. The crushing machine 26 has a large number of pin-shaped crushing cutters 26b, 26b,..., Each having a thinned tip portion, protruding from the surface of a crushing roller 26a. One end of the crushing roller 26a protrudes from the shaft, a sprocket 27 is fitted to the shaft end thereof, and a prime mover 28 such as a transmission motor or a hydraulic motor is fixed to the upper surface of the bracket 21, and the rotation of the electric motor 28 The drive is transmitted to the sprocket 27 by a chain 29 to rotate the crushing roller 26a. As shown in FIGS. 2 and 3,
The crushing roller of the crusher 26 is driven to rotate in a direction opposite to the rotation direction of the roller 13.
The roller 13 rotates clockwise when it rotates upward and tilts, and rotates counterclockwise when the roller 13 rotates downward and tilts.

Here, the node 14 provided on the roller 13 is circular, and any of the nodes 14 has a concave portion 31 along the circumference. A sharp portion 31a and a rounded portion 31b are provided at both ends of the concave portion 31, and a sharp portion 31a is provided at an end of the concave portion when the roller 13 rotates upward and incline of the frame 12,
A rounded portion 31b is provided at the end of the concave portion when the roller 13 rotates downward and incline of the frame 12.

As shown in FIG. 4, while the front side of the frame 12 is tilted to a low position, a rotary sieving apparatus 1 is moved from a hopper chute 25 (shown in FIG. 2) or the like.
When the raw material 30 is put into the center of the roller 1, each of the rollers 13, 1
3 rotate so as to push the raw material 30 upward. At this time, a lump smaller than the gap between the rollers 13 and 13 falls downward from between the rollers 13 and 13,
The raw material 30a having a mass larger than the gap between the rollers 13 and 13 and having high adhesiveness has a large frictional resistance with the surfaces of the roller 13 and the node 14 due to the adhesive force.
The raw material 30a is pushed upward by the weight against the force of falling downward by the weight, and the raw material 30a moves upward (the rear side of the frame 12).

At this time, as shown in FIG.
The sharp portion 31a of the concave portion 31 provided in
a, the bridge formed above the rollers 13, 13,... is broken down by the concave portion 31 of the rotating roller 13, even if a bridge phenomenon occurs in the hopper chute 25.

On the other hand, as shown in FIG.
Since the raw material 30b which is a lump larger than the gap between the rollers 3 and 13 and has low adhesiveness has a small frictional resistance with the roller 13, the falling force of the downward inclination due to gravity exceeds the pushing force due to the rotation of the roller. Then, the raw material 30b moves downward (to the front of the frame 12). Also, when the densities of the raw materials 30 are different, a difference occurs in the drop force due to gravity, and the contact resistance with the roller 13 is different. I do.

Therefore, the material 30a having a large mass and high adhesiveness is pushed up inclining upward and is caught between the crushing roller 26a and the roller 13 of the crushing machine 26.
The material 30a which has been formed into a large lump having high tackiness is originally an aggregate having a small particle shape, but has a relatively weak binding force, and can be easily crushed by the crusher 26. And falls downward from between the rollers 13.
On the other hand, the large lump and low-adhesive material 30b is pushed down the slope and discharged from the frame 12, and is separated from the high-adhesive material 30a.

Here, as shown in FIG.
When the raw material 30c of a high-density lump or a lump of high hardness such as stone or conglomerate is caught in the concave portion 31 provided in the roller, the roller 13 and the node 14 are broken or the rotation of the roller 13 is stopped. Therefore, the driving direction of the driving mechanism 23 is reversed to reverse the rotation direction of the roller 13 so as to be inclined downward. Therefore, since the rounded portion 31b of the concave portion 31 provided in the node portion 14 presses the raw material 30c, the raw material 30c is moved downward under the inclination of the frame 12 without being bitten by the concave portion 31. It is discharged out of the rotary sieve device 11.

The number of the nodes 14 having the concave portions 31 is arbitrary, and the circular nodes 14 in one roller 13 are formed.
And the number of the rollers 13 of the joint 14 with the concave portion 31 can be arbitrarily set according to the components of the raw material 30. Thus, the roll-rotating sieve device 11
Even when a large amount of the highly adhesive raw material 30a is supplied, a bridging phenomenon does not occur with respect to the hopper chute 25, and the raw material can be surely separated and classified, thereby improving the passage efficiency.

Thus, the present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0019]

According to the present invention, as described in detail in the above embodiment, in the invention according to the first aspect, a plurality of rollers are arranged between the left and right frames, and a node portion is provided at each part of each roller. If the left and right frames are inclined in the front-rear direction in the roll-rotating sieve device, and the rollers are driven so that the rotation direction of the rollers is inclined upward with respect to the inclination of the frames, the highly viscous raw material is rolled. Also, since the frictional resistance with the node is large, the body moves upward incline. By providing a concave portion along the circumference at an arbitrary node of the roller, it is possible to prevent the raw material staying on the roller from being crushed by the concave portion and causing a bridge phenomenon to the hopper chute.

The invention according to claim 2 is characterized in that a sharp portion and a rounded portion are provided at both ends of the concave portion, and the sharp portion is formed at the terminal end of the concave portion when the roller rotates upward and incline of the frame. With this arrangement, the raw material is sharply bitten by the sharp portion when the roller moves upward in the inclined direction, so that the raw material staying on the roller can be extremely effectively crushed and the bridge phenomenon can be prevented from occurring. . On the other hand, by providing a rounded portion at the end of the concave portion when the roller rotates downward and tilts the frame, when a dense mass or a hard mass such as stone or conglomerate is caught, the roller rotates. By reversing the direction so that the direction is inclined downward, the rounded portion of the concave portion presses the lump, so that the lump moves down the inclination of the frame without being bitten by the concave portion and the roll rotary sieve. Discharged out of the device.

Thus, even when a large amount of highly viscous raw material is put on the roll-rotating sieve device, a bridge phenomenon does not occur with respect to the hopper chute and the raw material can be reliably classified. As a result, the passage efficiency can be significantly improved.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a plan view of a roll-rotating sieve device.

FIG. 2 shows an embodiment of the present invention and is a side view of a roll-rotating sieve device.

FIG. 3 shows an embodiment of the present invention, and (a) is an explanatory view showing a rotation direction of a roll-rotating sieve device. (B) An enlarged view of a concave portion provided at a node of the roller.

FIG. 4 is an explanatory view showing an embodiment of the present invention and showing an operation state of a roll rotary type sieve device.

FIG. 5 is an explanatory view showing an embodiment of the present invention and showing an operating state of a sharp portion of a concave portion.

FIG. 6 is an explanatory view showing an embodiment of the present invention and showing an operation state of a round portion of a concave portion.

FIG. 7 is a side view of a conventional roll-rotating sieve in which a bridging phenomenon has occurred.

FIG. 8 is a sectional view taken along line AA of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Roll rotation type sieve apparatus 12 Frame 13 Roller 14 Knot part 23 Drive mechanism 31 Depression 31a Pointed part 31b Round part

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Toshikazu Yamaguchi 731-1, Naganumaharamachi, Inage-ku, Chiba-shi, Chiba F-term (reference) in Sumitomo Construction Machinery Manufacturing Co., Ltd. 4D021 AA15 AB12 BA01 CA11 CB09 DA01 DA20 EA05 EB01

Claims (2)

[Claims] A roll-rotating sieve device in which a plurality of rollers are rotatably arranged between left and right frames, and a node is provided at each part of each roller, and each roller is rotated by a driving mechanism. In this case, the left and right frames are provided to be inclined in the front-rear direction, and the rollers can be driven forward and reverse so that the rotation direction of the rollers is directed upward or downward with respect to the inclination of the frames. 3. A roll-rotating sieve device characterized in that a concave portion is provided along the circumference at the knot portion. 2. A concave portion provided at a node of the roller is provided with a sharp portion at an end of the concave portion when the roller rotates upwardly of the frame, and when the roller rotates downwardly downward of the frame. 2. The roll-rotating sieve device according to claim 1, wherein a rounded portion is provided at an end of the concave portion.