JP2008062222A - Rotary sorting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary sorting device capable of efficiently screening by preventing clogging of mesh holes when screening by sufficiently drying before screening, even if screening object raw material is wet with moisture, and efficiently recovering suspended fine powder by sufficiently suspending fine powder. <P>SOLUTION: This rotary sorting device is constituted so that the screening object raw material charged from a charge port 10 is agitated while moving it toward a discharge port 11 and successively continuous screening is performed. A rotary cylindrical body 1 has a peripheral wall between the charge port and the middle part, formed with a blocking peripheral wall 1a with a lifting plate protrudedly provided on the inner face, and the peripheral wall from the end of the blocking peripheral wall to the discharge port formed with a screen mesh peripheral wall 1b formed with a lot of through-holes 12, and is provided with a fine powder sucking device 5 recovering suspended fine powder by sucking inside air of the rotary cylindrical body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a crushed stone, crushed sand, concrete waste aggregate, mud, earth and sand, waste mixed aggregate, blast furnace slag aggregate, etc. alone or a mixture thereof, and a return raw concrete obtained by mixing fine powder or / and aggregate into a raw concrete. Rotating and sorting apparatus using mixed aggregate as raw materials, classifying these raw materials into oversized aggregates of a predetermined size or larger and undersize aggregates of a predetermined size or smaller, and collecting fine powder About.

  Conventionally, a rotary sorting device (Trommel) used for sorting crushed stones and powders is formed on the peripheral wall of a rotating cylinder while moving the material to be sorted introduced from the inlet into the rotating cylinder toward the outlet. It is formed so that the through-holes can be sieved to undersize aggregates and oversize aggregates (see Patent Document 1).

Conventionally, there is known a rotary sorting device formed so as to collect fine powder and light weight contained in a material to be sorted (see Patent Document 2).
This rotary sorting device is configured to insert a tip of a suction duct into a discharge port of a rotary cylindrical body, and suck and collect fine powder and light weight by a suction nozzle attached to the tip.
JP 2006-167588 A JP-A-8-309284

However, in the conventional rotary sorting apparatus, the peripheral wall of the rotating cylindrical body is formed as a sieve peripheral wall in which a through hole is formed over the entire length from the input port to the discharge port.
If the rotating cylindrical body is formed on the peripheral wall of the sieve over the entire length in this way, clogging starts in the through holes from the beginning when the raw material to be sorted is introduced from the inlet, and in particular, the raw material to be sorted is When it is wet and contains moisture (moisture content of about 2% or more), there is a problem that the clogging is severe as a whole, the sorting efficiency is remarkably lowered, and the working efficiency cannot be improved.

  In addition, if the material to be sorted is moist, the fine powder adheres to the raw material aggregate and the rotating cylinder and cannot float in the rotating cylinder, so even if equipped with a suction device, its ability cannot be fully demonstrated, There was a problem that the collection efficiency of the fine powder was low.

  Also, if the rotating cylinder is formed on the sieve peripheral wall over its entire length, the floating fine powder will be scattered outside the rotating cylinder through the through holes, and therefore it is necessary to provide a cover that covers the entire rotating cylinder. There is a problem that the apparatus becomes complicated and large.

The present invention makes it possible to stir a material to be sorted in a rotating cylindrical body and to dry the material to be sorted by applying air, and to continuously and continuously screen the dried material to be sorted. .
In particular, even raw materials that contain moisture can be efficiently screened by preventing clogging of the through-holes when they are sufficiently dried and screened before screening. In addition, an object of the present invention is to provide a rotary sorting device that can efficiently collect floating fine powder by sufficiently floating the fine powder.

In order to solve the above-mentioned problem, the rotary sorting device of the present invention (Claim 1)
A rotating cylindrical body having an inlet at one end and an outlet at the other end is provided. The material to be sorted introduced from the inlet is stirred while being moved toward the outlet, and continuously sieved. A rotary sorting device adapted to sort,
The rotating cylindrical body is formed of a closed peripheral wall in which a peripheral wall between the inlet and the middle is lifted on the inner surface and a protruding plate is provided, and the peripheral wall from the end of the closed peripheral wall to the discharge port has a large number of transparent walls. Formed with a sieving perimeter wall with holes,
And it was set as the structure provided with the fine powder suction device for attracting | sucking the internal air of a rotating cylinder and collect | recovering floating fine powder.

In addition, the rotary sorting device of the present invention (Claim 2)
A configuration is provided in which a blower is provided to send wind into the rotating cylindrical body.

In addition, the rotary sorting device of the present invention (Claim 3)
The rotation sorting device according to claim 2, wherein the blowing device is provided with a heating device for heating the air to be blown into the rotating cylindrical body.

In addition, the rotary sorting device of the present invention (Claim 4)
4. The rotary sorting device according to claim 2, wherein the blower is formed so as to send air into the rotary cylindrical body from the inlet to the outlet, and the fine powder inhaler is provided at the end of the closed peripheral wall. The suction port is formed.

According to the rotary sorting device of the present invention (Claim 1), the screening is not performed on the closed peripheral wall formed between the inlet and the middle of the rotary cylinder, and the target is selected by the rotation of the rotary cylinder inside the closed peripheral wall. While the raw material is agitated, the raw material to be sorted can be dried by the wind accompanying the suction of the internal air by the fine powder inhaler.
The material to be sorted, which has been stirred and dried in the closed peripheral wall in this way, continuously moves to the inside of the sieve peripheral wall, where it is sieved to the undersize aggregate and oversize aggregate using the through holes as a sieve. It is what is selected.

In this case, since the lifting plate projects from the inner surface of the closed peripheral wall, the stirring can be repeated such that the material to be sorted is lifted and dropped by the lifting plate along with the rotation of the rotating cylinder, and the material to be sorted is effective. Can be dried.
In addition, since the material to be sorted can be blown by the suction of the fine powder suction device while being stirred and lifted and dropped within the closed peripheral wall, it can be efficiently dried and the fine powder can be efficiently removed. Can be floated.

As described above, since the material to be sorted is dried by passing through the closed peripheral wall, it is possible to prevent clogging of the through-holes and efficiently screen and sort.
The fine powder contained in the raw material to be sorted can be suspended in the closed peripheral wall as the raw material to be sorted is stirred and dried in the closed peripheral wall. It can be efficiently recovered by the device.

In addition, when a blower is provided (Claim 2), in addition to the wind accompanying the suction of the fine powder suction device, the air from the blower is applied to the material to be sorted stirred in the closed peripheral wall. The material to be sorted can be dried more effectively.
This blower is effective when the material to be sorted is moist, and it is not always necessary to use it when the material to be sorted is dry from the beginning. The necessity of use is judged taking into account the dry state of the product.

  In addition, when a heating apparatus is provided in the air blower (Claim 3), the air blown into the inside of the rotating cylindrical body can be heated to blow the hot air, and the drying efficiency can be improved.

  Further, when the blower is formed so as to send air from the inlet to the outlet, and the suction port of the fine powder inhaler is provided at the end of the closed peripheral wall (Claim 4), the floating fine powder is removed from the closed peripheral wall. Therefore, it is possible to reduce the amount of fine powder scattered outside through the through-holes in the peripheral wall of the sieve.

  FIG. 1 is a cutaway side view showing an embodiment of a rotary sorting apparatus according to the present invention, FIGS. 2 and 3 are sectional views showing a rotating cylindrical body of the rotary sorting apparatus, and FIG. 3 is a cross-sectional view taken along the line BB in FIG.

  In the figure, reference numeral 1 denotes a rotating cylindrical body, which has an inlet 10 at one end (left end in FIG. 1) and an outlet 11 at the other end (right end in FIG. 1). The peripheral wall is formed by a closed peripheral wall 1a, and the peripheral wall from the end of the closed peripheral wall 1a to the discharge port 11 is formed by a sieve peripheral wall 1b in which a large number of through holes 12 are formed.

In the embodiment, the length of the closed peripheral wall 1a is about 85% of the total length of the rotating cylindrical body 1, and the length of the sieve peripheral wall 1b is about 15% of the total length of the rotating cylindrical body 1. It will never be done.
However, in order to sufficiently dry the material to be sorted in the closed peripheral wall 1a, the length of the closed peripheral wall 1a is preferably about 50% or more of the entire length of the rotating cylindrical body 1.
The sieve peripheral wall 1b may be formed of a net body having a large number of mesh through holes, or may be formed of a punching plate in which a large number of small through holes are formed.

The rotating cylinder 1 is rotatably supported by a machine frame 2.
The rotary drive structure is configured such that the lower part of the annular rail 13 projecting from the outer periphery of both ends of the closed peripheral wall 1a is rotatably supported by two rollers 20 provided on the machine frame 2, and is provided on the outer periphery of the closed peripheral wall 1a. By rotating the belt 31 between the pulley 14 and the pulley 30 of the electric motor 3 (a chain may be hung between the sprockets), the electric motor 3 rotates the rotating cylindrical body 1. .

Further, a spiral plate 15 is attached to the inner surface of the closed peripheral wall 1 a at the portion of the inlet 10, and the material to be sorted introduced into the rotary cylinder 1 from the inlet 10 is discharged by the rotation of the rotary cylinder 1. It is made to move toward 11.
The material to be sorted is charged into the rotary cylinder 1 through the charging port 10 by the charging chute 16.

The spiral plate 15 is not necessarily required, and even if the spiral plate 15 is not provided, the material to be sorted is transferred forward toward the discharge port 11 by being pushed forward as it is continuously supplied from the input port 10. Can do.
Thus, by omitting the spiral plate 15, the rotation direction of the rotating cylindrical body 1 can be either clockwise or counterclockwise.
Further, the rotating cylindrical body 1 may be provided horizontally, or may be provided with a slight downward inclination toward the discharge port 11.

A plurality of (eight in the embodiment) lifting plates 17 project from the inner end of the closed peripheral wall 1a at equal intervals so as to extend from the terminal portion of the spiral plate 15 toward the discharge port 11. Stirring is repeated such that the material to be sorted that has moved through the closed peripheral wall 1 a is lifted and dropped by the rotation of the rotating cylindrical body 1.
As a result, the aggregates and fine powders of the raw materials to be sorted are separated apart, such as separating the combined aggregates and separating the fine powders from the aggregates. It is possible to improve the drying efficiency by improving the wind contact with the apparatus 5 and to efficiently float the fine powder contained in the material to be sorted.

The lifting plate 17 shown in FIG. 2 has a substantially L-shaped cross section. However, as shown in FIGS. 4, 5 and 6, the lifting plate 17 has a substantially T-shaped cross section, a substantially H-shaped cross section, and a cross-sectional shape. You may form in a substantially Y shape.
Thus, when the lifting plate 17 is formed in a substantially L-shaped cross section, a substantially T-shaped cross section, a substantially H-shaped cross section, or a substantially Y-shaped cross section, the material to be sorted is moved into the rotating cylindrical body 1 by the rotation of the rotating cylindrical body 1. Can be lifted up and dropped from a high place, and the raw materials to be sorted can be sufficiently stirred.

In addition, a drop collision member 6 is attached to the inside of the rotating cylinder 1 by a support arm 60.
The drop collision member 6 is formed in a bowl shape by attaching several bar members 61 (16 in the embodiment) long in the axial direction of the rotating cylindrical body 1 to a circular frame 62.
When the drop collision member 6 is attached to the inside of the rotating cylindrical body 1, it collides when the material to be sorted scraped up inside the rotating cylindrical body 1 falls, and the impact promotes the separation of the material to be sorted. be able to.

  The falling collision member 6 is not limited to the one using several bar members 61 as in the embodiment, but, for example, a member formed in a bowl shape by a net material, or simply a bar member, a plate member, or a tube member is a rotating cylindrical body. What is necessary is just the member which collides when the to-be-sorted raw material falls, and can separate a to-be-sorted raw material by the impact. The drop collision member 6 is not always necessary.

  The sieving peripheral wall 1b is for sieving and sorting the raw material that has passed through the closed peripheral wall 1a into an undersized aggregate and an oversized aggregate using the through hole 12 as a sieving. The oversized aggregate passes through 12 and is collected by the discharge chute 18, and the oversized aggregate is discharged from the discharge port 11 and collected by the discharge chute 19.

The rotation sorting device is provided with a blower 4 for sending wind into the rotary cylinder 1.
In the blower 4, a blowing port 42 is formed at the tip of a duct 41 extending from the blower 40, and the blowing port 42 faces the inside of the rotating cylindrical body 1 from the charging port 10, whereby the discharging port 10 is discharged from the charging port 10. The air is blown toward 11.
In addition, a heating device 43 for heating the air from the blower 40 is provided in the middle of the duct 41 of the blower device 4, and the hot air can be blown into the rotating cylindrical body 1 by the heating device 43. And the drying efficiency can be improved.
In addition, as a heating means of the heating apparatus 43, a gas combustion apparatus, an electric heater, etc. can be used.

In addition, the rotary sorting device applies wind generated by sucking the internal air of the rotating cylindrical body 1 to the material to be sorted stirred inside the closed peripheral wall 1a, and the rotating cylindrical body 1 There is provided a fine powder inhaler 5 for collecting fine powder floating inside.
The fine powder inhaler 5 of the embodiment is fixed separately from the rotating cylinder 1, and a suction pipe 50 connected to a dust collector (not shown) is inserted into the rotating cylinder 1 from the discharge port 11. A suction port 51 provided at the tip of the suction pipe 50 opens toward the charging port 10 at the end of the closed peripheral wall 1a.

In order to prevent the fine powder in the closed peripheral wall 1a from moving to the sieve peripheral wall 1b as much as possible without interfering with the raw material (aggregate) that moves inside the rotary cylinder 1 in the suction port 51. A baffle plate 52 is attached.
In addition, an inclined plate 53 is attached to the baffle plate 52 in an obliquely inward direction from the outer periphery thereof, and the suction port 51 is opened in an upper space surrounded by the inclined plate 53 and the baffle plate 52.
In addition, by attaching a seal member made of rubber or the like to the outer periphery of the baffle plate 52 so as to be in contact with the inner peripheral surface of the rotating cylindrical body 1, the fine powder is transferred from the closed peripheral wall 1a to the sieve peripheral wall 1b. Can be effectively prevented.

Therefore, when the rotating cylindrical body 1 is rotated and the material to be sorted is introduced into the rotating cylindrical body 1 from the charging port 10, the material to be sorted is continuously transferred in the discharge direction by the spiral plate 15 in the closed peripheral wall 1a. Stirring is repeated from the lifting plate 17 and the drop collision member 6 in the closed peripheral wall 1a.
In such a stirring state, the material to be selected is dried by receiving the air accompanying the suction of air by the fine powder inhaler 5, and here, the material to be selected is not screened.

In addition, when the to-be-sorted raw material is moist, drying can be accelerated by operating the blower 4 as necessary and applying the air from the blower 4 to the to-be-sorted raw material. .
In this case, when the air to be blown is heated by the heating device 43, the hot air can be applied to the material to be sorted, and further drying can be promoted.

The material to be sorted, which is dried by receiving the air while being stirred in the closed peripheral wall 1a, continuously moves to the inside of the sieve peripheral wall 1b, where the through-holes 12 are used as sieves and the undersize aggregate and The oversized aggregate is sieved and selected.
Since the material to be sorted transferred to the sieve peripheral wall 1b is dried by receiving wind while passing through the closed peripheral wall 1a as described above, the material to be sorted is separated and aggregates and fine powder are separated. It becomes a smooth state and can prevent clogging in the through-hole 12.

  The fine powder contained in the raw material to be sorted can be floated in the closed peripheral wall 1a as the raw material to be sorted is stirred and dried in the closed peripheral wall 1a. The air is sucked from the suction port 51 of the suction device 5 and collected by the dust collector through the suction pipe 50.

In particular, in this embodiment, since the suction port of the fine powder inhaler is formed at the end of the closed peripheral wall, the fine powder floating in the closed peripheral wall 1a rides on the wind accompanying the suction of the fine powder inhaler. Then, it moves toward the discharge port 11 and is sucked into the suction port 51 at the end portion of the closed peripheral wall 1a, so that the fine powder can be efficiently recovered.
Further, when the blower 4 is used, the blower 4 is formed so as to send air from the inlet 10 toward the outlet 11, so that fine powder is put on the blower in the direction of the outlet 11. It is possible to make the transition, and the recovery by the fine powder inhaler 5 can be performed more efficiently.

Further, the fine powder floating in the closed peripheral wall 1a is prevented from moving to the sieve peripheral wall 1b by the baffle plate 52 at the end portion of the closed peripheral wall 1a. It is guided inward along 53 and sucked into the suction port 51 so as to go around the tip of the inclined plate 53.
In this way, the floating fine powder can be almost recovered at the end of the closed peripheral wall 1a, and the migration of the fine powder from the closed peripheral wall 1a to the sieve peripheral wall 1b can be prevented.
Of the fine powder separated from the raw material to be sorted and suspended, most of the fine powder is collected by the fine powder inhaler 5. However, there is also fine powder that moves to the inside of the sieve peripheral wall 1b and scatters outside. For such fine powder, for example, a dust collection cover may be attached to the outside of the sieve peripheral wall 1b, and the fine powder in the dust collection cover may be collected by a dust collector.

FIG. 7 is a sectional view showing another example of the inlet of the fine powder inhaler.
In this embodiment, a baffle plate 55 made of a disk is attached to the inner surface of the closed peripheral wall 1a at the end portion of the closed peripheral wall 1a via an arm material 54, and a suction port 51 is opened in the middle of the baffle plate 55. Yes.
In this case, the baffle plate 55 and the suction port 51 rotate together with the rotation of the rotating cylindrical body 1, so that a rotation connecting portion (rotary joint) is provided in the suction pipe.
In FIG. 7, the lifting plate 17 is formed in a substantially square shape in cross section.

  In the present invention, the air blowing device can be formed so as to send air from the discharge port toward the charging port, and the suction port of the fine powder suction device can be provided at an arbitrary position of the rotating cylindrical body.

In addition, as the raw material to be processed by the rotary sorting apparatus of the present invention, crushed stone, crushed sand, concrete waste aggregate, mud, earth and sand, waste mixed aggregate, blast furnace slag aggregate, etc. alone or in mixture, return raw concrete Return raw concrete mixed aggregate obtained by mixing fine powder or / and aggregate into the target can be targeted.
In particular, since it is possible to process the above-mentioned return raw concrete mixed aggregate, the processing operation of the return raw concrete is compared with the conventional wet processing in which the return raw concrete is washed to remove the aggregate. It becomes extremely simple and the processing apparatus becomes simple.
Note that the rotary sorting apparatus of the present invention can be effectively applied to a wet material to be sorted, but of course can be applied to a material to be sorted that has already been dried.

  It is a notch side view which shows the Example of the rotation sorting device based on this invention.   It is sectional drawing which shows the rotation cylindrical body of a rotation sorting apparatus, and is AA sectional drawing of FIG.   It is sectional drawing which shows the rotation cylindrical body of a rotation sorting apparatus, and is BB sectional drawing of FIG.   It is a fragmentary sectional view of the rotation cylinder which shows other examples of a lift plate.   It is a fragmentary sectional view of the rotation cylinder which shows other examples of a lift plate.   It is a fragmentary sectional view of the rotation cylinder which shows other examples of a lift plate.   It is sectional drawing which shows the other examples of the inlet of a fine powder inhaler.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating cylindrical body 1a Closure peripheral wall 1b Sieve peripheral wall 10 Input port 11 Discharge port 12 Through hole 13 Annular rail 14 Pulley 15 Spiral plate 16 Input chute 17 Lift plate 18 Discharge chute 19 Discharge chute 2 Stand frame 20 Roller 3 Electric motor 30 Pulley 31 Belt 4 Blower 40 Blower 41 Duct 42 Air outlet 43 Heating device 5 Fine powder suction device 50 Suction tube 51 Suction port 52 Baffle plate 53 Inclined plate 54 Arm member 55 Baffle plate 6 Falling collision member 60 Support arm 61 Rod 62 Circular frame

Claims (4)

A rotating cylindrical body having an inlet at one end and an outlet at the other end is provided. The material to be sorted introduced from the inlet is stirred while being moved toward the outlet, and continuously sieved. A rotary sorting device adapted to sort,
The rotating cylindrical body is formed of a closed peripheral wall in which a peripheral wall between the inlet and the middle is lifted on the inner surface and a protruding plate is provided, and the peripheral wall from the end of the closed peripheral wall to the discharge port has a large number of transparent walls. Formed with a sieving perimeter wall with holes,
A rotary sorting device comprising a fine powder suction device for sucking the internal air of the rotary cylindrical body and collecting floating fine powder.   The rotation sorting apparatus according to claim 1, further comprising a blower for sending air into the rotating cylindrical body.   3. The rotation sorting apparatus according to claim 2, wherein the blower is provided with a heating device for heating the air blown into the rotary cylinder.   4. The rotary sorting device according to claim 2, wherein the blower is formed so as to send air into the rotary cylindrical body from the inlet to the outlet, and the fine powder inhaler is provided at the end of the closed peripheral wall. A rotary sorting device in which a suction port is formed.

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