JP2003306229A - Device for preventing arching of hopper content - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent the generation of arching phenomenon. <P>SOLUTION: Blade members 14 extended over the whole length in the vertical direction inside a hopper 1 are arranged at positions at 180 degree in relation to each other, pinching a shaft 6 arranged at the predetermined height in the hopper 1, in parallel with the shaft 6 with a required interval. Both ends of each blade member is integrally fitted through a connecting member 15 extended in the radial direction in the outside surface of the shaft 6. The shaft 6 is supported freely to rotate at both ends thereof by a bearing 8 provided in both side wall in front and rear of the hopper 1, and a rotary driving mechanism 9 provided with a driving motor 11 is connected to a front end of the shaft 6 projected out of the hopper 1. When the humidified ash 4 thrown into the hopper 11 is pressurized for compaction, the blade members 14 are integrally driven for rotation with the shaft 6 in the hopper 1, and the compacted condition of the humidified ash 4 is broken in a part of a locus of the blade member 14 to fall the humidified ash 4 to a bottom of the hopper 1. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing arching of hopper contents, such as humidified ash, for preventing an arching phenomenon in which hopper contents which are easily compacted are left in an arch state in the hopper. is there.

[0002]

2. Description of the Related Art In recent years, fly ash generated in a thermal power plant or the like has been mixed with mortar for reuse. In a fly ash mortar manufacturing facility of this type, since the fly ash is difficult to handle in a fluffy state, the fly ash is humidified to form a humidified ash to facilitate handling. In such a fly ash mortar manufacturing facility, in order to adjust the amount of the fly ash mixed in the mortar, it may be necessary to measure a humidified ash that is a humidified product of the fly ash, in which case the humidified ash is After being put into a weighing hopper to perform weighing, it is supplied to a required device at a subsequent stage for performing mixing with mortar.

As an example of the hopper for discharging the humidified ash as described above, as shown in FIG.
As shown in FIG. 3, a hopper 1 having a screw conveyor 2 as a discharging mechanism at the bottom is configured, and a motor M installed outside the hopper 1 drives the screw conveyor 2 via a rotation driving mechanism 2a. There is a type in which the contents of the hopper put into the hopper 1 can be extracted and conveyed by the screw conveyor 2 and discharged from a discharge port 3 provided under the front end of the screw conveyor 2.

When the hopper 1 is used, after the humidified ash 4 is put into the hopper 1, the humidified ash 4 is discharged by the screw conveyor 2 at the bottom, so that the humidified ash 4 located at the inner bottom of the hopper 1 is removed. The humidified ash 4 distributed at the same height position in the hopper 1 is moved downward at the same speed as a whole by being sequentially discharged and removed. During this downward movement, the humidified ash 4 has a property of being easily compacted.
When it moves downward along a, it becomes in a consolidated state, so that, as shown in FIG. 3B, only the humidified ash 4 at the lower part of the hopper 1 is discharged, and the humidified ash 4 at the upper part becomes an arched state and becomes a hopper. There is a case where a so-called arching phenomenon occurs, which is caused to remain within 1.

Therefore, in the hopper 1 that handles the humidified ash 4, as shown in FIGS. 4 (a) and 4 (b), the hopper 1 extends to the required height position in the hopper 1 in the front-rear direction which is the conveying direction of the screw conveyor 2. Is provided with an arch collapsing device 5 integrally provided with stirring blades 7 extending in the radial direction on the outer surface of the shaft 6 at a required interval in the longitudinal direction, and both ends of the shaft 6 of the arch collapsing device 5 are Hopper 1
Is rotatably supported at the required height positions on both front and rear side walls of the shaft via a bearing 8, one end of the shaft 6 is projected from the front side wall of the hopper 1, and the shaft 6 is projected outward from the hopper 1. Driven sprocket 10 integrally attached to one end
And the hopper 1 located laterally of the driven sprocket 10.
A drive motor 11 with a speed reducer attached to the outside of the front side wall via a support member 11a, a drive sprocket 12 attached to the output shaft of the drive motor 11, and the drive and driven sprockets 10, 12 respectively. A rotation drive mechanism 9 including a power transmission chain 13 that is wound endlessly
So that the arch collapse device 5 is activated, and the hopper 1
If the arching phenomenon of the humidified ash 4 occurs inside,
Drive the drive motor 11 of the arch collapse device 5,
By rotating the stirring blade 7 integrally with the shaft 6 in the hopper 1 by the rotational driving force transmitted from the driving motor 11 through the sprockets 10 and 12 and the chain 13, the arched shape is obtained. The arching phenomenon is eliminated by forcibly breaking the consolidating state of the humidified ash 4 by the rotating stirring blades 7, and the humidified ash 4 is dropped to the bottom of the hopper 1 and discharged by the screw conveyor 2. Is proposed.

[0006]

However, in the above-described conventional arch collapse device 5, the humidifying ash 4 is scraped down by the stirring blades 7 radially attached to the shaft 6 at required intervals in the longitudinal direction. Depending on the consolidating state of the humidified ash 4 that has caused the arching phenomenon, only the humidified ash 4 located on the rotation locus of the stirring blade 7 is destroyed, and the humidified ash positioned between the stirring blades 7 in the longitudinal direction of the shaft 6 is broken. Four
Sometimes it is not possible to break the consolidation state of
In this case, with the rotation of the stirring blade 7, the stirring blade 7
There is a possibility that the humidified ash 4 located near the rotation locus of is further compacted and becomes hard to collapse.

Therefore, the present invention is intended to provide an arching preventive device for hopper contents which can more surely eliminate the arching phenomenon of the hopper contents in the hopper over the entire surface of the hopper.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention rotatably supports a horizontally arranged shaft in a hopper designed to discharge the contents of a hopper from the bottom, An elongated collapsible member arranged parallel to the shaft is integrally attached to the shaft at a required distance from the shaft to form an arch collapse device that allows the shaft and the vane member to rotate about the shaft. The arch collapse device can be rotationally driven by a rotational drive mechanism outside the hopper.

When the vane member is rotationally driven integrally with the shaft in the hopper by the rotational driving force of the rotary drive mechanism, the vane member is rotated in a state of extending in parallel with the shaft. The hopper contents, which have a length of almost the entire length in the front-rear direction and have a cylindrical shape with the shaft as the center of axis, and which are compacted in the hopper, are blade members that rotate at positions corresponding to the rotation locus of the blade members. Stirs to break the consolidated state. Accordingly, when the arching phenomenon has already occurred in the hopper, the arching phenomenon can be eliminated, while when the arching phenomenon has not occurred in the hopper, the blade members are continuously operated. It is possible to prevent the arching phenomenon from occurring in advance by rotating it in the direction. At this time, since the blade member has an elongated shape, the contents of the hopper are less likely to be further consolidated.

Further, the arch collapsing device is arranged so that the slender blade member is tilted with respect to the shaft, instead of mounting the slender blade member parallel to the shaft in the hopper and rotating the shaft about the shaft. In addition, since the plurality of blade members are positioned in the longitudinal direction of the shaft and are attached to the shaft, the length of one blade member can be shortened. The rotation resistance in the object can be reduced, and the driving force required for the rotation drive mechanism can be reduced. Therefore, the rotation drive mechanism can be downsized and the running cost can be reduced. It becomes possible and the rotation path of the elongated blade member is inclined with respect to the shaft, so that the inside of the rotation path centered on the shaft is Object is a truncated cone shape, since the contents of the weight of the upper base side and the lower base side is unbalanced, it is possible to make the contents of the compacted state more easily collapse.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1A and 1B show an embodiment of an apparatus for preventing arching of hopper contents according to the present invention. As shown in FIGS. 4A and 4B, inside the hopper 1. 6 rotatably supported by arranging it in the front-back direction in the center of
In place of the arch collapsing device 5 configured to integrally attach the stirring blade 7 extending in the radial direction to the outer surface of the required space in the longitudinal direction, the shaft 6 in the hopper 1 is placed at a position opposite to the arch collapse device 5 by 180 degrees. The elongated vane members 14 each having a length substantially equal to the entire length in the front-rear direction in the hopper 1 are arranged in parallel with each other at a required distance from the shafts 6, and both front and rear end portions of each vane member 14 are connected to both ends of the shaft 6. The arch collapse device 5a is configured to be integrally connected to the shaft 6 via a connecting member 15 extending in the radial direction from the portion.

When the blade member 14 is rotated by the rotation of the shaft 6, the cross-sectional shape of the blade member 14 is along the rotational direction so that the humidified ash 4 located on the downstream side in the rotational direction is not likely to be newly consolidated. As a flat rectangle, the whole shape is flat. The other configuration is shown in FIG.
It is similar to that shown in (b), and the same components are denoted by the same reference numerals.

The arch collapsing device 5a having the above structure is mounted on the hopper 1 having the screw conveyor 2 at the bottom similarly to the arch collapsing device 5 shown in FIGS. When the humidified ash 4 moves downward as it is sequentially withdrawn from the bottom of the hopper by the screw conveyor 2, the inclined portion 1 below the hopper 1
When the arching phenomenon as shown by the chain double-dashed line in FIG. 1 (b) occurs due to the compaction by a, the drive motor 11 of the arch collapse device 5a is driven to integrally move the blades with the shaft 6 in the hopper 1. The member 14 is rotated. As a result, the blade member 14 is rotated on a concentric circle centered on the shaft 6, and the blade member 14 has a length over the entire length in the front-rear direction in the hopper 1. Member 1
Since the rotation locus of No. 4 is a cylindrical region as a whole, the compacted humidified ash 4 that has caused the arching phenomenon is cut and stirred at the portion of the blade member 14 located on the cylindrical rotation locus. As a result, the compaction state is broken, and for this reason, the hopper 1 corresponding to the rotation locus of the blade member 14
The humidified ash 4 located at the center of the hopper 1 is dropped to the bottom of the hopper 1. In this way, the central portion of the humidified ash 4 in the consolidated state is dropped to the bottom of the hopper 1 and removed, so that the consolidated state of the portion of the humidified ash 4 located near the inclined portion 1a below the hopper 1 is also eliminated. As a result, the humidified ash 4 which has been subjected to the arching phenomenon is destroyed in the consolidated state over the entire surface in the hopper 1, and the arching phenomenon is eliminated.

It should be noted that the arch collapse device 5a having the above-described structure is configured such that, when the humidified ash 4 is charged into the hopper 1, the drive motor 11 continuously drives the blade member 14 to rotate integrally with the shaft 6. In this case, the humidified ash 4 moving downward along the inclined portion 1a at the bottom of the hopper 1 can be constantly stirred over the entire front-back direction inside the hopper 1, so that the humidified ash 4 is consolidated. It is possible to prevent the occurrence of the state and prevent the occurrence of the arching phenomenon in advance.

As described above, since the consolidating state of the humidified ash 4 in the hopper 1 can be destroyed over the entire surface of the hopper 1, the arching phenomenon of the humidified ash 4 in the hopper 1 can be more reliably performed as compared with the conventional case. Therefore, the humidified ash 4 can be smoothly discharged from the bottom of the hopper 1 by the screw conveyor 2.

Next, FIG. 2 shows another embodiment of the present invention, which has a length dimension over substantially the entire length in the front-rear direction in the hopper 1 as shown in FIGS. Blade member 1
4 is arranged in parallel with the shaft 6, and instead of the arch collapsing device 5a which is integrally attached to the shaft 6 via a connecting member 15, blade members 16a and 16b having a shorter length than the blade member 14 are mutually attached. The humidified ash 4 in the hopper 1 is completely consolidated by rotating the blade members 16a and 16b integrally with the shaft 6 so as to be inclined and symmetrical in the longitudinal direction. It is something that can be broken.

That is, the one blade member 16a is
The front end is separated from the shaft 6 in the vicinity of the front side wall of the hopper 1, and the rear end is tilted in the front-rear direction so as to contact the shaft 6 at the front-rear intermediate portion of the hopper 1. The separated front end portion is fixed to the outer surface of the shaft 6 via the connecting member 15, and the shaft 6 is
The rear end of the shaft 6 is directly fixed to the outer surface of the shaft 6. The other blade member 16b has a rear end portion spaced apart from the shaft 6 near the rear side wall of the hopper 1 and a front end portion in front of and behind the hopper 1 at a position of 180 degrees between the blade member 16a and the shaft 6. It is arranged so as to be inclined in the front-rear direction so as to come into contact with the shaft 6 at the intermediate portion in the direction,
The rear end portion separated from the shaft 6 is fixed to the outer surface of the shaft 6 via a connecting member 15, and the front end portion contacting the shaft 6 is directly fixed to the outer surface of the shaft 6. . In addition, each blade member 1 described above
The rear end portions of the blade members 16a and the front end portions of the blade members 16b are made to overlap each other in the front-rear direction so that the rotation loci of the blades 6a, 16b are continuous over the entire length of the hopper 1 in the front-rear direction.

Other configurations are the same as those shown in FIGS. 1A and 1B, and the same components are designated by the same reference numerals.

According to the present embodiment, when the arching phenomenon of the humidified ash 4 occurs in the hopper 1, the drive motor 11 of the rotary drive mechanism 9 is driven to integrate each blade member 16a with the shaft 6. , 16b are rotated in the hopper 1, the blade member 16a is moved from the front end portion to the intermediate portion of the hopper 1.
The humidified ash 4 in a consolidated state located on the rotation locus having a conical surface is cut and stirred to eliminate the consolidated state, and
From the rear end portion to the intermediate portion of the hopper 1, the humidified ash 4 in the consolidating state located on the conical surface rotation locus of the blade member 16b is cut and agitated to eliminate the consolidating state. Since the rotational trajectories of 16a and 16b overlap in the front-rear direction, the compacted state of the humidified ash 4 is eliminated over the entire surface of the hopper 1, and therefore, FIG.
It is possible to obtain the same effects as the embodiment shown in (a) and (b). Furthermore, since the length of the blade members 16a and 16b can be shortened, the resistance when rotating the blade members 16a and 16b in the compressed humidified ash 4 can be reduced, and the rotary drive mechanism 9 can be used. The rotational driving force required for the driving motor 11 can be reduced, and therefore, the driving motor 11 of the rotational driving mechanism 9 can be downsized or the driving motor 11
It is possible to reduce the power cost required for the operation. Further, the number of connecting members 15 for attaching the blade members 16a or 16b to the outer surface of the shaft 6 can be reduced, and the manufacturing cost can be reduced.
Further, since the rotation loci of the elongated blade members 16a and 16b are inclined with respect to the shaft 6, the humidified ash 4 inside the rotation locus about the shaft 6 has a truncated cone shape, and the humidified ash on the upper bottom side and the lower bottom side is formed. Since the weight of 4 is unbalanced, the humidified ash 4 in a consolidated state can be more easily broken.

The present invention is not limited to the above-mentioned embodiment, but the blade members 14, 16a, 16b.
Is shown as a flat plate having a rectangular cross section flattened in the rotational direction, but if the humidified ash 4 located on the downstream side in the rotational direction is not likely to be newly consolidated when rotationally driven. Alternatively, the cross-sectional shape may be a circle or a round bar shape that is an ellipse flattened in the rotation direction.
In the embodiment of (b), the pair of blade members 14 is shown, and in the embodiment of FIG. 2, the blade members 16a and 16b are shown as being attached at symmetrical positions with the shaft 6 in between. When rotating, the blade members 14 or 16
If the resistance of the humidified ash 4 acting on a and 16b is not unevenly distributed in the circumferential direction of the shaft 6, the blade member is not
May be provided at three places at 120 ° intervals in the circumferential direction, at four places at 90 ° intervals, or at evenly spaced places in the circumferential direction, and further, the strength of the shaft 6 may be sufficient. If possible, the blade member 14 extending over substantially the entire length of the hopper 1 in the front-rear direction is attached to the shaft 1 in the circumferential direction.
It may be attached only to a portion, and if the rotation trajectory of the blade member can be arranged continuously over the entire length in the front-rear direction in the hopper 1, the front-rear direction in the hopper 1 can be set to three.
The elongated blade members may be divided into three or more regions and extend in the front-rear direction so as to correspond to the respective regions, and the elongated blade members may be integrally attached to the shaft 6, and the shaft 6 and the blades in FIGS. The distance from the member 14 and FIG.
The distance between the shaft 6 and the front end of the blade member 16a or the distance between the shaft 6 and the rear end of the blade member 16b may be set freely according to the size of the hopper 1 on which the arch collapse device 5a should be installed. The hopper 1 to which the arch collapse device 5a is attached may be a hopper 1 that handles a substance that is easily compacted and may cause an arching phenomenon, and may be a hopper that handles a substance other than the humidified ash 4 or a bottom part. Applicable to any type of hopper other than the hopper 1 provided with a screw conveyor 2 at the bottom, such as a hopper 1 having a discharging mechanism such as a belt conveyor, a hopper having a damper or a rotary valve type opening / closing mechanism at the lower end, and the like. Of course, various modifications may be made without departing from the scope of the present invention.

[0022]

As described above, the arching prevention device for the contents of the hopper of the present invention exhibits the following excellent effects. (1) A horizontally arranged shaft is rotatably supported in a hopper designed to discharge the contents of the hopper from the bottom, and a long and narrow blade member arranged in parallel with the shaft is provided on the shaft at a required distance from the shaft. So that the shaft and the blade member can rotate around the shaft, and the arch collapse device can be rotationally driven by a rotation drive mechanism outside the hopper. Since it is configured as described above, by rotating the blade member, the compacted state of the hopper contents generated in the hopper can be collapsed over the entire surface of the hopper without generating a new compacted state. The arching phenomenon can be prevented more reliably than in the past, so that the contents of the hopper can be discharged smoothly from the bottom of the hopper. Can. (2) Instead of attaching the slender blade member to the shaft in the hopper and rotating it about the shaft, the slender blade member is arranged so that the slender blade member is inclined with respect to the shaft. Since a plurality of blade members are arranged in the longitudinal direction of the shaft and are attached to the shaft respectively, the length of the blade member can be shortened, so that the blade member rotates in the hopper contents. The resistance can be reduced, and the driving force required for the rotary drive mechanism can be reduced. Therefore, the rotary drive mechanism can be downsized, and the running cost can be reduced.
Further, since the rotation locus of the elongated blade member is inclined with respect to the shaft, the contents inside the rotation locus around the shaft have a truncated cone shape, and the weights of the contents on the upper bottom side and the lower bottom side are unbalanced. Therefore, the contents in the consolidated state can be more easily collapsed.

[Brief description of drawings]

1 shows an embodiment of an apparatus for preventing arching of hopper contents according to the present invention, in which (a) is a schematic plan view,
(B) is a view of the arrow (A) taken in the AA direction.

FIG. 2 is a schematic plan view showing another embodiment of the present invention.

3A and 3B show an example of a hopper with a screw conveyor, in which FIG. 3A is a schematic plan view, and FIG. 3B is a view taken in the direction of BB in FIG.

4A and 4B are schematic diagrams showing an example of a conventional arching prevention device for hopper contents, wherein FIG. 4A is a plan view and FIG. 4B is a view taken in the direction of arrows CC in FIG.

[Explanation of symbols]

1 hopper 5,5a Arch collapse device 6 shafts 9 Drive mechanism 14 Blade member 15 Connection member 16a, 16b blade member

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3E070 AA19 AB11 FA08 FB03 GA04                       GA05 HA07 HB01 VA17 WF03                 3F075 AA07 BA01 BB01 CA09 CC05                       DA04

Claims (2)

[Claims] 1. A horizontally arranged shaft is rotatably supported in a hopper configured to discharge the contents of the hopper from the bottom, and an elongated blade member arranged parallel to the shaft is rotatably supported on the shaft. An arch collapsing device that is integrally attached to a shaft at a required interval so that the shaft and the blade member can rotate about the shaft is configured, and the arch collapsing device can be rotationally driven by a rotation drive mechanism outside the hopper. A device for preventing arching of the contents of a hopper, which has a structure that enables it. 2. The arch collapsing device is arranged so that the elongated blade member is inclined relative to the shaft instead of mounting the elongated blade member parallel to the shaft in the hopper and rotating the shaft around the shaft. The arching prevention device for the contents of the hopper according to claim 1, wherein a plurality of blade members are positioned in the longitudinal direction of the shaft and are attached to the shaft.