JP2012179563A - Double trommel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double trommel, efficiently sorting materials to be sorted according to three kinds of sizes, achieving miniaturization and reduction in weight of an apparatus, and lowering the cost for foundation work and manufacture.SOLUTION: A porous plate 8A where transmission holes 7A are bored is wound in an intermediate part of the outer periphery of a cylindrical frame 6 to form an inner cylindrical screen 10, and a porous plate 8B where a number of transmission holes 7B having smaller sieve openings than the transmission holes 7A are bored is wound round the outer periphery side of the inner cylindrical screen 10 to form an outer cylindrical screen 13. One end opening part of the inner cylindrical screen 10 is taken as a feed port 15, the other end opening part is taken as a first discharge port 16, and a lower opening of the outer cylindrical screen 13 is taken as a second discharge port 17 to form a double cylindrical screen 2. Two driven rollers 19 are mounted to the upside of an inclined base 1, two driving rollers 21 are mounted to the lower side thereof, and both sides of the double cylindrical screen 2 are rotatably supported thereon.

Description

The present invention relates to an improvement of trommel.

Bark (bark) that is discharged when timber is peeled off with a peeling machine, and chips that are crushed from peeled timber vary in size, so they are sieved and sorted to a certain size. . As a sorting device for sieving, there are a horizontal rotation sorting device (Patent Document 1) for moving a screen laterally and a horizontal trommel (Patent Document 2) for rotating a cylindrical screen. Since the horizontal rotation sorter moves the screen laterally, there is a problem that the foundation work of the base supporting it is very expensive.

In addition, the horizontal type trommel inserts a rotating shaft inside the cylindrical screen, rotates the rotating shaft with a motor, and rotates the cylindrical screen connected integrally therewith to select the input raw material. Since a large torque is applied to the rotating shaft, the shaft has to be thickened, and there is a problem that the apparatus is complicated and heavy.

JP 53-34169 JP 2001-232295 A

The present invention improves the above-mentioned problem, and by separately providing an outer cylindrical screen on the outer side of the inner cylindrical screen and rotating it in a double manner, the material to be sorted can be efficiently sorted into three sizes. The present invention provides a double trommel that can shorten the lengthwise direction, reduce the size and weight of the device, and reduce the cost of foundation work and manufacturing.

In the double trommel according to the first aspect of the present invention, an inner cylindrical screen is formed by winding a perforated plate having a large number of perforated holes in the middle of the outer periphery of the bowl-shaped cylindrical frame, and a sieve is formed from the perforated holes. An outer cylindrical screen is formed by winding a perforated plate having a large number of small-diameter perforated holes around the outer peripheral side of the inner cylindrical screen to form an outer cylindrical screen, and this is integrally joined to the bowl-shaped cylindrical frame. The opening on one end side of the inner cylindrical screen is used as the inlet, the opening on the other end is used as the first outlet, and the ring-shaped opening on the first outlet side of the outer cylindrical screen is used as the second outlet. A double cylindrical screen is formed as an outlet, and two rollers are attached to the upper and lower sides of the inclined base at an interval, and a bowl-shaped cylindrical frame of the double cylindrical screen is placed on these rollers. Rotate both sides along the longitudinal direction of the The upper two rollers are driven rollers, and the lower at least one roller is a driving roller connected to a motor. The medium and small materials to be sorted are passed through, and the remaining large materials to be sorted are discharged to the outside through the first discharge port, and then passed through the inner cylindrical screen. The material is further sorted by an outer cylindrical screen with a small mesh, and the small material to be sorted is collected through the permeation hole, and the remaining medium material to be sorted is discharged from the second outlet to the outside. Thus, it is characterized by sorting into three kinds of materials to be sorted.

A double trommel according to a second aspect of the present invention is the double trommel according to the first aspect, wherein a ring-shaped flange portion projects from the outer periphery of the cylindrical portion on the lower side of the bowl-shaped cylindrical frame, and a presser roller is provided on both sides of the flange portion. Is attached to prevent the movement of the double cylindrical screen.

The double trommel according to claim 3 of the present invention is the double trommel according to claim 1, wherein one of the two lower rollers is a drive roller and the other is a driven roller. The double-cylindrical screen is attached so as to be inclined with respect to the direction orthogonal to the central axis of the double cylindrical screen, and the driven roller is attached in parallel to the driving roller.

The double trommel according to a fourth aspect of the present invention is characterized in that, in the first aspect, the driving roller is a non-punctured tire or a non-slip elastic rubber is wound around the outer periphery.

According to the double trommel of the first aspect of the present invention, the outer cylindrical screen is integrally provided outside the inner cylindrical screen, and is rotatably supported on the driven roller and the driving roller connected to the geared motor. The large cylindrical material is sorted by the inner cylindrical screen, discharged from the first outlet to the outside, and the medium and small sorted materials that have passed through the inner cylindrical screen are separated by the outer cylindrical screen having a small sieve mesh. Further, the small material to be sorted is collected by passing through the permeation hole, and the remaining medium-sized material to be sorted is discharged to the outside through the second discharge port, so that the material to be sorted is divided into three sizes. Can be sorted.

In addition, the outer cylindrical screen with a large outer diameter has a high peripheral speed, and the material to be sorted is dropped by being lifted high along the inner peripheral surface, and hits against the outer periphery of the rotating inner cylindrical screen and the inner bottom surface of the outer cylindrical screen. Therefore, it is possible to efficiently sort small materials to be sorted, and in particular, when sorting wood chips, it is possible to obtain chips of a suitable size with a small selling ratio and a high selling price. Furthermore, since the outer cylindrical screen is integrally provided outside the inner cylindrical screen, the longitudinal direction can be shortened to reduce the size and weight of the device, and the foundation work and manufacturing cost can be reduced.

According to the double trommel described in claim 2, since the ring-shaped flange portion protrudes from the outer periphery of the cylindrical portion on the lower side of the bowl-shaped cylindrical frame, and the presser rollers are attached to both sides of the flange portion, The double cylindrical screen is prevented from moving and can be rotated stably.

According to the double trommel described in claim 3 of the present invention, one of the two lower rollers is a drive roller and the other is a driven roller, and the drive roller is moved upward to move the double cylindrical screen. As described above, since the driven roller is mounted in parallel to the driving roller while being inclined with respect to the direction orthogonal to the central axis of the double cylindrical screen, the double cylindrical screen is moved upward by the driving roller. The load applied to the presser roller that rotates and contacts the ring-shaped brim portion from below is reduced, and damage to the bearing of the presser roller can be prevented.

According to the double trommel described in claim 4, since the non-slip elastic rubber is wound around the non-punctured tire or the outer periphery, the double cylindrical screen can be stably rotated without slipping. Can do.

Hereinafter, an embodiment of the present invention used for sorting wood chips will be described in detail with reference to FIGS. As shown in FIGS. 1 and 2, the double trommel is supported by a double cylindrical screen 2 on a base 1 whose upper part is inclined, so as to be horizontally inclined and rotatable. As shown in FIG. 2, the double-cylindrical screen 2 has a bowl-like shape in the middle of a bowl-shaped cylindrical frame 6 in which a bowl-like frame 5 is formed between cylindrical parts 3 and 4 each having a metal plate wound around both ends. An inner cylindrical screen 10 is formed on the frame 5 by winding a perforated plate 8A having a large number of transmission holes 7A.

Further, an outer cylindrical screen 13 is formed by winding a perforated plate 8B having a large number of permeation holes 7B smaller than the permeation holes 7A at intervals on the outer peripheral side of the perforated plate 8A of the inner cylindrical screen 10. Then, the upper end is closed with a ring-shaped metal plate 11, and the cylindrical portion 9 is provided at the lower end to form a ring-shaped opening. As shown in FIG. 3, the cylindrical portion 9 is provided with a plurality of reinforcing stays 12 radially and connected to the cylindrical portion 3 of the inner cylindrical screen 10 so that the outer cylindrical screen 13 and the inner cylindrical screen 10 are integrally formed. ing.

As shown in FIG. 2, the opening on the upper side of the inner cylindrical screen 10 is used as the inlet 15, the opening on the lower side is used as the first outlet 16, and the first outlet 16 side of the outer cylindrical screen 13. This ring-shaped opening is used as the second discharge port 17.

Further, on the upper side and the lower side of the inclined base 1, two rollers are attached at intervals as shown in FIG. 5, and a double cylindrical screen 2 is formed on these rollers. The cylindrical portion 3 and the cylindrical portion 4 on both sides along the longitudinal direction of the cylindrical frame 6 are rotatably supported. In this case, the two rollers arranged on the upper side are used as the driven roller 19, and the two rollers arranged on the lower side are used as the driving roller 21 connected to the geared motor 20 due to the rotational force of the driving roller 21. The double cylindrical screen 2 is rotated in the arrow direction shown in FIG. For example, a no-puncture tire is used as the drive roller 21 to prevent slipping.

Further, as shown in FIG. 1, a ring-shaped flange portion 23 projects from the outer periphery of the cylindrical portion 3 on the lower side of the bowl-shaped cylindrical frame 6, and presser rollers 24 formed of bearings are provided on both sides of the flange portion. It is attached and prevents the double cylindrical screen 2 from moving downward. As shown in FIG. 4, a V-shaped chute 18 is attached so as to surround the left and right sides and the lower side of the outer cylindrical screen 13 of the double cylindrical screen 2.

As shown in FIG. 2, the tip of a carry-in belt conveyor 28 for carrying a wood chip 25 finely cut by a chopper (not shown) into the inner cylindrical screen 10 of the double-cylindrical screen 2 is inserted into the insertion port 15. Yes. Further, a carry-out belt conveyor 29A for collecting oversized chips 25A is provided in front of the first discharge port 16, and a carry-out belt for collecting suitable size chips 25B in front of the second discharge port 17. A conveyor 29 </ b> B is provided, and a carry-out belt conveyor 29 </ b> C that collects the dust 26 is provided below the chute 18 that surrounds the outer cylindrical screen 13.

When the driving roller 21 connected to the geared motor 20 rotates, the double cylindrical screen 2 rotatably supported on the driven roller 19 rotates in the direction of the arrow in FIG. In this state, the wood chip 25 finely cut by the chopper as the material to be sorted is carried in from the loading port 15 of the double cylindrical screen 2 by the carry-in belt conveyor 28.

Since the double cylindrical screen 2 rotates in this way, the wood chip 25 thrown into the inside also descends in the inner cylindrical screen 10 while rotating, and as shown in FIG. The suitable size chips 25B and the dust 26 pass through the permeation holes 7A, and the oversized chips 25A are lowered as they are and discharged from the first discharge port 16 by the carry-out belt conveyor 29A.

The chip 25B and the dust 26 of suitable size that have passed through the inner cylindrical screen 10 fall on the outer cylindrical screen 13 provided on the outer side and further rotate and are sorted by the transmission holes 7B of the perforated plate 8B having a small sieve mesh. Only the dust 26 passes. The dust 26 is guided by the V-shaped chute 18 and falls, and is carried out to the outside by the carry-out belt conveyor 29C. The chip 25B of the appropriate size remaining in the outer cylindrical screen 13 is lowered as it is and discharged to the outside from the second discharge port 17 by the carry-out belt conveyor 29B.

In this case, as shown in FIG. 4, first, the oversized chip 25 is sorted by the inner cylindrical screen 10, and then the suitable size chip 25B in which the dust 26 is mixed is sorted by the outer cylindrical screen 13. Compared with the method of removing the dust 26 in a state where the oversized chips 25 are mixed, the dust 26 sorting efficiency is superior.

Moreover, since the outer cylindrical screen 13 having a large outer diameter is selected, the peripheral speed is high, and the suitable size chip 25B mixed with the dust 26 is lifted and dropped along the inner peripheral surface, and the outer periphery of the rotating inner cylindrical screen 10 is rotated. Moreover, since it falls so that it may hit against the inner bottom face of the outer cylindrical screen 13, the mixed dust 26 is more efficiently removed. As a result, it is possible to obtain a chip 25B of a suitable size with a low dust content and a high selling price.

Further, as shown in FIG. 2, the double cylindrical screen 2 is sandwiched between the front and rear sides of the ring-shaped flange portion 23 by pressing rollers 24, 24. It can rotate smoothly without moving. Furthermore, since the drive roller 21 is formed of a no-puncture tire, the double cylindrical screen 2 can be smoothly rotated without slipping.

FIG. 6 shows another embodiment of the present invention, in which a driving roller 21 and a driven roller 19 that rotatably support the cylindrical portion 3 of the inner cylindrical screen 10 are arranged facing each other, and the upper portion of the driving roller 21 is When rotating in the direction of the arrow, the double cylindrical screen 2 is moved by the rotation so as to be inclined with respect to the direction perpendicular to the central axis C of the double cylindrical screen 2, and the driven roller 19 is attached to the drive roller 21. It is attached in parallel with. By inclining the drive roller 21 that rotates while supporting the cylindrical portion 3 in this way, a force that moves the double cylindrical screen 2 upward acts, and the presser roller that contacts the ring-shaped flange portion 23 from the lower side. The load applied to 24 can be reduced, and the bearing of the presser roller 24 can be prevented from being damaged. The inclination angle of the driving roller 21 and the driven roller 19 is set in a range of, for example, several degrees in consideration of the outer diameter, the processing amount, the rotation speed, and the like of the double cylindrical screen 2.

In the above description, a case where a no-puncture tire is used as the drive roller 21 is shown, but a non-slip elastic rubber may be wound around the outer periphery of the metal roller. Moreover, although the case where the punching plate which punched circular perforation | permeation hole 7A, 7B was used as the perforated plates 8A and 8B was shown, square and a polygon may be sufficient and a lath material may be used.

The double trommel of the present invention can be widely used not only for sorting bark and chips of wood, but also for sorting powder, gravel, crushed industrial waste and the like.

1 is a side view of a double trommel according to an embodiment of the present invention. It is a side view which fractures | ruptures and shows the double trommel of FIG. It is a front view which shows the double trommel of FIG. It is a front view which fractures | ruptures and shows the double trommel of FIG. It is explanatory drawing which shows the arrangement | positioning relationship between the drive roller which supports a double cylindrical screen, and a driven roller. It is explanatory drawing which shows the attachment state of the drive roller by other embodiment of this invention.

1 base
2 Double cylindrical screen
3 Cylindrical part
4 Cylindrical part
5 bowl-shaped frame
6 bowl-shaped cylindrical frame
7A, 7B Transmission hole
8A, 8B perforated plate
10 Inner cylindrical screen
11 Ring-shaped metal plate
12 Reinforcing stay
13 Outer cylindrical screen
15 slot
16 First outlet
17 Second outlet
18 Shoot
19 Followed roller
20 Geared motor
21 Drive roller
23 head
24 Presser roller
25 Wood chips
25A oversized chip
25B compatible size chip
26 Dust
28 Carry-on belt conveyor
29A, 29B, 29C Unloading belt conveyor

Claims (4)

  A perforated plate in which an inner cylindrical screen is formed by winding a perforated plate with a large number of perforated holes in the middle of the outer periphery of the bowl-shaped cylindrical frame, and a large number of perforated holes smaller than the perforated holes are opened. Is wound around the outer peripheral side of the inner cylindrical screen at an interval to form an outer cylindrical screen, which is integrally joined to the bowl-shaped cylindrical frame, and an opening on one end side of the inner cylindrical screen is inserted And forming a double cylindrical screen with the opening at the other end as the first outlet and the ring-like opening at the first outlet of the outer cylindrical screen as the second outlet. Two rollers are mounted on the upper and lower sides of the base with a space between them, and on both rollers, both sides along the longitudinal direction of the bowl-shaped cylindrical frame of the double cylindrical screen are rotatably supported. , Follow the upper two rollers Medium, small-sized materials to be sorted by rotating the inner cylindrical screen, and at least one roller on the lower side is a driving roller connected to a motor. The remaining large sort material is discharged to the outside through the first discharge port, and the medium and small sort materials that have passed through the inner cylindrical screen are further sorted by the outer cylindrical screen with a small mesh size. Then, small materials to be sorted are collected through the permeation holes, and the remaining medium-sized materials to be sorted are discharged to the outside through the second discharge port and sorted into three types of materials to be sorted. A double trommel, characterized by   A ring-shaped flange portion is provided on the outer periphery of the cylindrical portion on the lower side of the bowl-shaped cylindrical frame, and a pressing roller is attached to both sides of the flange portion to prevent the double cylindrical screen from moving. The double trommel according to claim 1.   One of the two lower rollers is a driving roller, the other is a driven roller, and the driving roller is rotated in the direction perpendicular to the central axis of the double cylindrical screen so that the double cylindrical screen is moved upward by rotation thereof. 2. The double trommel according to claim 1, wherein the double trommel is attached with an inclination with respect to the driven roller, and the driven roller is attached in parallel with the driving roller.   The double trommel according to claim 1, wherein the driving roller is a non-punctured tire or an elastic rubber that is not slipped is wound around the outer periphery.