JP3016475B2 - Sieve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sieving apparatus used for sorting raw materials such as construction residual soil generated during civil engineering work into relatively large and small materials.

[0002]

Various types of sieves have conventionally been provided as this type of sieve. For example, there is a rotary type sieve called a trommel. This has the following configuration.

[0003] That is, a cylindrical rotary cylinder having a large number of sieve holes on its outer periphery is provided as a sieve means, and this rotary cylinder is formed such that its axial direction is horizontal and one end in the axial direction. The input port side is inclined to be higher than the discharge port side at the other end, and is rotatably disposed on the support.

[0004] In the above structure, when a material such as earth and sand is introduced from the inlet at one end while rotating the rotary cylinder, the raw material is gradually moved to the discharge port side while being stirred in the rotary cylinder. In this process, soil and sand of particles smaller than the hole fall from the hole, and stones and the like larger than the hole do not fall from the hole but are finally discharged from the outlet.
As a result, it is sorted into relatively large and small objects. According to this, it is possible to continuously sort by sequentially feeding the raw materials from the charging port.

[0005] However, in the above-mentioned conventional structure, especially when the raw material to be charged is sticky like mud or clay, the raw material closes the hole of the rotary cylinder, and a so-called clogged state occurs. In some cases, the sorting cannot be performed satisfactorily.

[0006] The present invention has been made in view of the above circumstances, and an object thereof is to provide a sieve device capable of continuously sorting, preventing clogging, and performing good sorting. It is in.

[0007]

In order to achieve the above object, the invention of claim 1 has an input port for inputting a raw material such as earth and sand at one end in the axial direction, and a lower port at the other end. It has a discharge port for discharging the residue after sorting, and has a large number of sieve gaps extending in the circumferential direction between these input ports and the discharge port, and in a state where these sieve gaps are on the lower side. A receiver provided to be supported by a support and receiving the raw material input from the input port and sieving the raw material through the sieve gap, and rotatably disposed in the receiver, the receiver being rotated with the rotation. A stirrer having a large number of scraping blades inserted into the sieve gap at the outer periphery thereof while stirring the raw material therein, and the receiver
And a hydraulic cylinder for adjusting the degree of inclination in the longitudinal direction .

In the above, the discharge port side is the input port.
Tilt the receiver with the hydraulic cylinder so that it is lower than
When the raw material is put into the receiver from the input port in the inclined state , the raw material is gradually moved to the discharge port side while being stirred by the stirrer. Sand and the like fall from the sieve gap, and stones and the like larger than the sieve gap do not fall from the sieve gap and are finally discharged from the discharge port. As a result, the raw materials are continuously sorted into relatively large and small materials. In this case, since the scraping blade is inserted into each sieve gap with the rotation of the stirring body, even if the sieve gap is temporarily closed by clay or the like, the clogged blade is removed by the scraping blade. Therefore, clogging can be prevented.

According to a second aspect of the present invention, in order to achieve the same object as in the first aspect, a cylindrical shape is provided, and at one axial end thereof is provided an inlet for charging raw materials such as earth and sand, and at the other end. Part has a discharge port for discharging the residue after sorting, and
It has a large number of sieve gaps extending in the circumferential direction on the outer peripheral portion between these inlets and outlets, and is provided rotatably supported by the support in a state where the axial direction is horizontal, from the inlet. A receiver for receiving the input raw material and sifting the raw material through the sieve gap with rotation, and disposed in the receiver in a state where the raw material is fixed to the support. A stirrer having a number of scraping blades inserted into the container, and a transfer means for transferring the raw material in the receiver to the discharge port side.

[0010] In the above, when the raw material is charged into the receiver through the charging port, the raw material in the receiver is gradually moved to the discharge port side while being stirred with the rotation of the receiver. Soil or sand having a smaller particle size than the sieve gap falls through the sieve gap, and stones or the like larger than the sieve gap do not fall through the sieve gap and are finally discharged from the discharge port.
As a result, the raw materials are continuously sorted into relatively large and small materials. In this case, since the scraping blade of the stirrer is inserted in each sieve gap, even if the sieve gap is temporarily closed by clay or the like, the scraper blade closes the sieve gap with the rotation of the receiver. This makes it possible to remove clogs, thereby preventing clogging.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment in which the present invention is applied to a method for selecting raw materials such as construction surplus soil will be described with reference to FIGS. First, in FIGS. 1 to 4, the receiver 1 is configured by providing a large number of grizzly bars 3 in a fixed state in a frame 2 having a rectangular frame shape long in the left-right direction in FIGS. 1 and 2. This receiver 1
The support portion 1a at one end (the left end in FIGS. 1 and 2) in the longitudinal direction is connected to the support portion 5a of the support 5 via a rotatable connection portion 4 in a state where the longitudinal direction is horizontal. In addition to being supported, the support portion 1b at the other end is supported by the column 5b of the support 5 via the hydraulic cylinder 6 that can move up and down.

In the frame 2, a guide surface 7a (see FIG. 3) is inclined downward toward the grizzly river 3 at a rear portion of a left end portion, which is one end portion in the longitudinal direction, and an input port whose upper surface is open. The lower end of the right end, which is the other end in the longitudinal direction, is provided with a discharge port 8 having an open lower surface. Each of the above-described grizzly rivers 3 is shown in FIGS.
As shown in FIG. 5, a large number of sieve gaps 9 are formed in a semicircular shape that is convex downward when viewed from the side, and extend in the circumferential direction between each other. The sieve gap 9 has a width of about 40 mm and is provided from the portion corresponding to the inlet 7 to the outlet 8. Below the sieve gap 9, a drop port 10 having an open lower surface is provided.

In the receiver 1, a stirrer 11 is rotatably disposed. The stirrer 11 has a central shaft 12 arranged along the longitudinal direction of the receiver 1 and three arm portions 13a projecting radially from the central shaft 12, and is intermittently arranged in the axial direction. A plurality of support arms 13 arranged in a fixed manner, three base portions 14 provided so as to be connected to the arm portions 13a adjacent to the distal ends of the arm portions 13a of the support arms 13, and It comprises a large number of scraping blades 15 arranged side by side on the base portion 14.

The center shaft 12 has a left end on the supporting portion 1.
a is rotatably supported via a bearing 16, and the right end is connected to a motor 17 provided on the support portion 1 b, and is rotated by the motor 17. Each base portion 14 is twisted such that the left end portion 14a precedes the right end portion 14b when the rotation direction of the stirrer 11 is the direction of arrow A in FIGS. This constitutes a transfer means for transferring the raw material in the receiver 3 from the input port 7 side to the discharge port 8 side. Further, as shown in FIGS. 4 and 5, each base portion 14 rotates along the vicinity of the inner surface of each grizzly river 3 when the stirring body 11 rotates.

A scraping blade 15 provided on each base portion 14
Are provided in a number corresponding to the number of the sieve gaps 9, and the respective tip portions are inserted into the corresponding sieve gaps 9. Here, as shown in FIG. 4, the rotation center O1 of the stirring body 11 and the center O2 of the arc (radius r) of the grizzly river 3 in the receiver 1 (the center of the arc of the sieve gap 9) are matched. . In this case, in the stirring body 11, the respective base portions 14 and the scraping blades 15 are arranged on the outer peripheral portion of the stirring body 11, and a relatively large space portion 18 communicating with the outside is provided on the inner side of the base portion 14. It has a formed configuration.

As described above, the sieve device 19 is configured. At the time of use, a belt conveyor 20 for discharging the sorted residue (not shown) is provided below the discharge port 8. Although not shown, raw materials such as construction soil are continuously fed into the inlet 7 from a belt conveyor, for example. Further, a belt conveyor for carrying earth and sand that has fallen from the sieve gap 9 is provided below the drop opening 10.

Next, the operation of the above configuration will be described. In use, first, the receiver 1 is tilted by the hydraulic cylinder 6 so that the right side of the receiver 1 in FIG. 1 is lower than the left side. In this case, both the hydraulic cylinder 6 for tilting the receiver 1 and the twisting of the base portion 14 of the agitator 11 constitute transfer means for transferring the raw material in the receiver 1 to the discharge port 8 side. At this time, by appropriately adjusting the degree of inclination of the receiver 1 and the rotation speed of the stirring body 11, the speed at which the raw material in the receiver 1 moves to the discharge port 8 side can be adjusted. Then, the stirring body 11 is rotated by the motor 17, and in this state, the raw material such as construction residual soil is continuously charged into the charging port 7.

Then, the raw material in the receiver 1 is stirred by the stirring body 11
And is gradually moved to the discharge port 8 side by the inclination of the receiver 1 and the feed force due to the twist of the base portion 14. In this process, of the raw material, soil, sand, etc., of particles smaller than the sieve gap 9 fall from the sieve gap 9 to below the drop port 10, and stones larger than the sieve gap 9 fall from the sieve gap 9. And is finally discharged from the discharge port 8. As a result, the raw materials are continuously sorted into relatively large and small materials.

In this case, the scraping blades 15 are inserted into the respective sieve gaps 9 with the rotation of the stirrer 11, so that even if the sieve gaps 9 are temporarily closed by clay or the like, the scraping blades 15 are used. The obstruction can be removed, so that clogging can be prevented.

A relatively small object dropped from the drop port 10 is carried to a predetermined place by a belt conveyor (not shown), and a relatively large object (residue) discharged from the discharge port 8 is transferred by the belt conveyor 20. It is carried to a predetermined place.

According to the above-described embodiment, the raw material charged into the receiver 3 from the charging port 7 is gradually transferred to the discharging port 8 while being stirred by the stirrer 11, and is sieved by the sieve gap 9 in this process. In addition, since the residue after the sorting is discharged from the discharge port 8, the raw material can be continuously sieved.

Further, the agitator 11 provided in the receiver 1
With the rotation of, the scraping blade 15 is inserted into each sieve gap 9, so that even if the sieve gap 9 is temporarily closed by clay or the like, clogging can be prevented,
Sorting can be performed favorably, and productivity can be improved.

Further, the center O1 of rotation of the stirrer 11 for stirring the raw material in the receiver 1 and the center O2 of the arc of the grizzly river 3 in the receiver 1 (the center of the arc of the sieve gap 9) are matched. Since the base portion 14 that directly agitates is rotated along the vicinity of the inner surface of the grizzly river 3, it is possible to prevent an object from being caught between the base portion 14 and the grizzly river 3 as much as possible. Thus, the sorting can be performed more favorably.

Further, while the stirrer 11 is arranged in the receiver 1, the stirrer 11 has a base portion 14 for stirring the raw material provided on an outer peripheral portion thereof.
Since a large space portion 18 communicating with the outside is formed on the inner side of the space, relatively large stones and the like are stirred in the space portion 18, which also enables good sorting.

In the first embodiment, the receiver 1
As a means for transferring the raw material inside to the discharge port 8 side, a means for inclining the receiver 1 and transferring it by the inclination, and twisting the base portion 14 of the stirring body 11 to rotate the base portion with the rotation of the stirring body 11 Although both of the means for feeding by 14 are used , only the means for inclining the receiver 1 may be used.

Next, a second embodiment of the present invention will be described with reference to FIGS. The second embodiment is different from the first embodiment in that the receiver is rotated while the agitator is fixed.

First, the support 31 is provided on both the left and right sides with the support portions 3.
A base portion 32 having two bases 2a and 32b, and a hydraulic cylinder whose one end is supported by a left supporting portion 32a via a rotatable connecting portion 33 and the other end of which is vertically movable by a right supporting portion 32b. And a support base 35 supported through the support base 34. A frame 36 extending in the left-right direction in FIGS. 6 and 7 is provided on both front and rear sides of the support base 35, and a first drop port 37 extending from the left side to the right side is provided at a lower part. 2nd fall port 3
8 are provided.

The receiver 40 has a cylindrical shape that is long in the left-right direction in FIGS. 6 and 7, and is disposed in the frame 36 of the support base 35 with the axial direction being horizontal. The receiver 40 has short cylindrical portions 41 and 42 disposed at both left and right ends in the axial direction, and four V-shaped cross sections provided to connect between the short cylindrical portions 41 and 42. A connecting member 43 and a number of ring-shaped grizzly bars 45 provided between the short cylindrical portions 41 and 42, supported by the connecting member 43, and forming circumferentially extending sieve gaps 44 therebetween; It is composed of Each grizzly river 45 has a T-shaped cross section. In this receiver 40, the short cylindrical portions 41 and 42 at both ends in the axial direction are
It is rotatably supported via four rollers 46 and 47 provided on the support base 35.

In the receiver 40, the short cylindrical portion 4 at the left end
1 is an input port 48, and the right short cylindrical portion 4
An opening without the grizzly bar 45 is formed over the entire circumference in the vicinity of 2, and this opening is used as a discharge port 49. The sieving gap 44 by the grizzly river 45
The area in which is formed corresponds to the first drop port 37, and the discharge port 49 corresponds to the second drop port 38. A motor 50 is provided on the left side of the support base 35. The motor 50 rotates the roller 46 via a chain or the like, and the rotation of the roller 46 causes the receiver 40 to move in the direction of arrow B (FIGS. 8 and 9). See).

A stirrer 51 is provided in the receiver 40 while being fixed to the support 35. The stirrer 51 has a central shaft 52 whose left and right ends are fixed to the support base 35, and two arms 53a projecting radially from the central shaft 52, and intermittently in the axial direction. A plurality of support arms 53 provided, and two base portions 54 provided so as to be continuous with the arm portions 53a adjacent to the distal ends of the arm portions 53a of the support arms 53.
And a number of scraping blades 55 arranged side by side on each of the base portions 54.

In this case, each base portion 54 has a central axis 52
It is in a straight line parallel to. Further, the number of the scraping blades 55 provided in each base portion 54 is provided corresponding to the number of the sieve gaps 44, and the respective tip portions are inserted into the corresponding sieve gaps 44. Further, as shown in FIG. 9, the rotation center O3 of the receiver 40 and the stirring body 51
And the center O4 of the central axis 52 of FIG.

As described above, the sieve device 56 is configured. In use, similarly to the first embodiment, a belt conveyor 57 for discharging the sorted residue (not shown) is provided below the second drop port 38. Although not shown, a belt conveyor for carrying dirt and the like dropped from the sieve gap 44 is provided below the first dropping port 37. Further, raw materials such as construction surplus soil are continuously supplied to the input port 48.

Next, the operation of the above configuration will be described. In use, first, the receiver 4 is operated by the hydraulic cylinder 34.
0 so that the right side in FIG. 6 is lower than the left side.
Tilt 0. In this case, the receiver 40 is tilted and the material in the receiver 40 is discharged by the hydraulic cylinder 34 to the outlet 49.
It constitutes a transfer means for transferring to the side. At this time, the receiver 4
By appropriately adjusting the degree of inclination of 0, it is possible to adjust the speed at which the raw material in the receiver 40 moves to the discharge port 49 side. Then, the receiver 40 is moved by the motor 50 to the roller 4.
In this state, the raw materials such as construction residual soil are continuously charged into the charging port 48.

Then, the raw material in the receiver 40 is
While being stirred by the rotation of 0 and the stirring body 51, the container is gradually moved to the discharge port 49 side by the inclination of the receiver 40. In this process, soil or sand of particles smaller than the sieve gap 44 among the raw materials fall from the sieve gap 44 to below the first drop port 37, and stones larger than the sieve gap 44 are removed from the sieve gap. It does not fall from 44 and is finally discharged from the discharge port 49 through the second drop port 38. As a result, the raw materials are continuously sorted into relatively large and small materials.

In this case, since the scraping blade 55 of the stirring body 51 is inserted into each sieve gap 44, even if the sieve gap 44 is temporarily closed by clay or the like, the scraping blade 55 closes the gap. Debris can be removed, thereby preventing clogging.

A relatively small object dropped from the first drop port 37 is transported to a predetermined place by a belt conveyor (not shown), and a relatively large object (residue) discharged from the second discharge port 38. Is transported to a predetermined place by the belt conveyor 57.

In the second embodiment, the same operation and effects as those of the first embodiment can be basically obtained.

[0038]

According to the first aspect of the present invention, the raw material charged into the receiver from the charging port is gradually transferred to the discharging port while being stirred by the stirrer, and is sieved through the sieve gap in this process. Since the residue after sorting is discharged from the discharge port, the raw material can be continuously sieved. In addition, with the rotation of the stirrer arranged in the receiver, the scraping blade is inserted into each sieve gap, so even if the sieve gap is temporarily closed by clay or the like, clogging and clogging may occur. Can be prevented, sorting can be performed favorably, and productivity can be improved. Further
Adjust the inclination of the receiver with a hydraulic cylinder.
The speed at which the material in the receiver moves to the outlet
It can be easily adjusted.

According to the second aspect of the present invention, the raw material charged into the receiver from the input port is gradually transferred to the discharge port side while being stirred by the rotation of the receiver and the stirrer. In addition to the sieving, the residue after sorting is discharged from the outlet, so that the raw material can be continuously sieved. In addition, since the scraping blade of the stirrer is inserted into each sieve gap, even if the sieve gap is temporarily closed by clay or the like, it becomes possible to prevent clogging, and good sorting is achieved. And productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a first embodiment of the present invention.

FIG. 2 is a plan view

FIG. 3 is a right side view

FIG. 4 is a longitudinal sectional side view of a main part.

FIG. 5 is a longitudinal sectional front view of a main part.

FIG. 6 is a longitudinal sectional front view showing a second embodiment of the present invention.

FIG. 7 is a plan view

FIG. 8 is a right side view.

FIG. 9 is a longitudinal sectional side view of a main part.

FIG. 10 is a longitudinal sectional front view of a main part.

[Explanation of symbols]

1 is a receiver, 3 is a grizzly bar, 5 is a support, 6 is a hydraulic cylinder (transfer means), 7 is an inlet, 8 is an outlet, 9 is a sieve gap, 11 is a stirring body, and 14 is a base (transferr). Means), 15 is a scraping blade, 17 is a motor, 19 is a sieve device, 3
1 is a support, 34 is a hydraulic cylinder (transfer means), 40 is a receiver, 44 is a sieve gap, 45 grizzly river, 46, 4
7 is a roller, 48 is an inlet, 49 is an outlet, 50 is a motor, 51 is a stirrer, 54 is a base, 55 is a scraping blade, 5
6 is a sieve device.

Claims (2)

(57) [Claims] At one end in the longitudinal direction, there is an inlet for charging a raw material such as earth and sand, and at the lower part of the other end , there is an outlet for discharging the sorted residue, and With a large number of sieve gaps extending in the circumferential direction between the outlet and
A receiver that is provided to be supported by the support in a state where the sieve gaps are on the lower side, and that receives the raw material input from the input port and sieves by the sieve gaps; Arranged, while stirring the raw material in the receiver with its rotation, a stirring body having a number of scraping blades inserted into the clearance for the sieve in the outer peripheral portion, the degree of inclination in the longitudinal direction of the receiver Adjusting hydraulic syringe
Screen device being characterized in that comprising a da. 2. It has a cylindrical shape, has an inlet at one end in the axial direction for feeding raw materials such as earth and sand, and has an outlet at the other end for discharging residues after sorting, and It has a large number of sieve gaps extending in the circumferential direction on the outer peripheral portion between these inlets and outlets, and is provided rotatably supported by the support in a state where the axial direction is horizontal, from the inlet. A receiver for receiving the input raw material and sifting the raw material through the sieve gap with rotation, disposed in the receiver in a state where the raw material is fixed to the support, A stirrer having a number of scraping blades inserted into the container, and transfer means for transferring the raw material in the receiver to the discharge port side.