JP3015930B2 - Discharge device for storage material in hopper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to powdery substances or various kinds of dust, sludge, sludge, garbage, sawdust, chips,
The present invention relates to a discharge device for a storage material in a hopper that stores and transports okara, pulverized coal, and the like.

[0002]

2. Description of the Related Art Generally, there is a storage hopper and a discharge device for storing and transporting powdery substances, various kinds of dust, sludge, and the like. In the storage hopper and the discharge device, powdery substances, various kinds of dust, sludge, and the like are shelved in the storage hopper and clog the storage hopper. In order to solve these problems, for example, Japanese Utility Model Laid-Open No.
Japanese Patent Application Laid-Open No. Sho 50-111165, Japanese Patent Application Laid-Open No. Sho 54-74482, discloses a mechanism in which air is blown into an upper portion of a discharge device in a lower portion of a storage hopper to stably discharge a storage material by flowing air. As disclosed in Japanese Unexamined Patent Publication (Kokai) No. 55-56287, the operating pieces provided in the storage hopper are alternately moved, or shelving or clogging of the storage hopper is eliminated by a stone box extending into the storage hopper. It has been proposed to prevent the hopper from clogging by dispersing fitting holes in the peripheral wall of the storage hopper, and allowing the extruding element to move into and out of the hopper in the fitting holes.

[0003]

However, with the above-mentioned conventional apparatus and air flow, the prevention of shelving and clogging of the hopper is insufficient, and the material pulsates and the discharge amount fluctuates. In addition, in the means for causing the extruding element to protrude and retract in the ston box and the hopper, particularly when the discharging device is a screw conveyor, a paddle screw conveyor, or a ribbon screw conveyor (hereinafter simply referred to as a screw conveyor), a part of the material in the storage hopper is used. In order to cause a consolidation state due to the pressing, it is conceivable that some materials may be reversely shelved to promote clogging of the hopper. In addition, there is a problem that the amount of conveyance and unloading varies due to a change in the amount of the storage material flowing into the screw conveyor, the adhesion of the conveyance material to the spiral blades of the screw conveyor, or a partial filling between the blades. SUMMARY OF THE INVENTION The present invention provides a storage material shelves that cannot be solved by these conventional storage material discharge devices, reliably prevents hopper clogging, adheres a screw conveyor, suppresses charging, and stably discharges storage materials. It is an object of the present invention to provide a discharge device for a storage material in a hopper, which can make its own angle of repose smaller than the angle of repose of the material and can increase the hopper capacity.

[0004]

In order to solve the above-mentioned problems of the conventional apparatus, the present inventors have previously devised a method and apparatus for discharging hopper storage material (Japanese Patent Application No. 4-34443). A very good effect has been achieved. As a result of further intensive studies on the discharge state of the material after that, the present invention has been achieved, and at least one discharge screw conveyor is provided below the storage hopper, and the discharge screw conveyor is disposed on the bottom plate of the storage hopper. Along with providing an oriented slidable pushing plate, a scraping protrusion for scraping up the material deposited between the bottom plate of the storage hopper and the supporting portion of the pushing plate is provided at appropriate intervals, and In the discharge device for the storage material in the hopper provided integrally with the support portion.
In addition, the shape of the push-in plate and the raking protrusion is, for example, in the case of the push-in plate, a triangle, a rectangle, a deformed rectangle with one end cut off, or the like, as long as the material can apply an extrusion force in the screw conveyor direction. good. Further, the scraping-up projections can scrape up the material deposited between the hopper bottom plate and the support portion of the push-in plate, and for example, plate-like projections, L-shaped, V-shaped, and rectangular shapes can be used. .

[0005]

The discharge device configured as described above discharges the material in the storage hopper first by the discharge screw conveyor.
Due to the viscosity and consolidation of the material, shelving, cavitation and rolling of the screw conveyor occur. In order to prevent this phenomenon, the push-in plate is slid at regular intervals or as required by the reciprocating device. Due to the sliding of the pushing plate, the material is pushed into the discharge screw conveyor in a predetermined pressing state, and is discharged while being surely cut between the spiral blades. This discharge effect is more preferable as the extrusion direction is closer to the axis of the screw. Further, the material deposited on the support of the storage hopper bottom plate and the push plate is scraped up each time the push plate is slid into place by the scraping projections. As a result, firstly, when the stored material is pushed in, the pushing force in the direction of the discharge screw conveyor and the pushing force in the upward direction due to the scraped material act on the material at the same time. Can be greatly improved. Also,
The second is that the material deposited on the bottom plate, the support portion and the pushing plate of the storage hopper is sequentially lifted upward from the vicinity of the bottom plate and flows, so that there is no adhesion or sticking at the lower portion of the storage hopper,
With the scraping, the accumulation of the pushing plate portion is eliminated, and at the same time, a pushing force is applied to the storage material, so that shelving and empty pushing can be prevented.

[0006]

1 is a sectional view of an apparatus for discharging stored material in a hopper according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG. . First, a discharge screw conveyor 2 is provided at the lower center of the storage hopper 1, and a push plate 4 and an advance / retreat device 5 such as a cylinder that slides the push plate 4 are provided on a bottom plate 3 of the storage hopper 1 with an appropriate gap. is there.

The push plate 4 is fixed to a support portion 6 of the push plate 4, and the support portion 6 has floating prevention plates 7, 7 '.
Are provided, and a guide 8 provided integrally with the bottom plate 3,
8 'to make it slidable. The lifting prevention plates 7, 7 'and the guides 8, 8' are not limited to the structure shown in FIG. 2, and any general structure may be used as long as the pushing plate 4 and the support portion 6 are slidably locked. Can be.

Further, as shown in FIGS. 3 (a) and 3 (b), the supporting portion 6 of the pressing plate 4 is provided with scraping projections 9 and 9 ', which are also shown in FIGS. b) The shape is not limited to a shape, and any general protrusion that can scrape up the material in the gap between the support portion 6 and the bottom plate 3 can be used. In the discharge device configured as described above, FIG.
In the figure, the pushing plate 4 is a triangle having a height of 100 mm and a length of 100 mm, and a gap of 700 mm and a gap of 80 mm from the bottom plate 3.
The protrusions 9 and 9 'were set at a distance of 100 to 70 mm from the end of the pressing plate 4 to 40 to 70 mm.
FIG. 3 (b) shows that the height of the pressing plate 4 is set to 32 mm in order to reduce the thickness of the pressing layer and increase the pressing force per unit area in the same cylinder, and the other conditions are the same. ′ Was formed in a V-shape to improve the scraping rate, and the sliding was performed with a height of 60 to 130 mm.

As a result, in any case, no accumulation was caused between the support portion 6 and the bottom plate 3, and the material was constantly subjected to the flow replacement, and there was no adhesion or sticking. Further, a swelling due to the material scraped up at the time of sliding is generated, and both the pushing force and the swelling force in the direction of the discharge screw conveyor achieve the flow pushing of a thicker layer. Also at the time of sliding return, the application of the swelling force of the material prevented the shelving and completely prevented the empty press at the next press.

[0010]

As is apparent from the above invention, the device for discharging storage material in the hopper according to the present invention can eliminate shelving, prevent the discharge screw conveyor from being hollow, and prevent the discharge screw conveyor from being rolled. Excellent effects were obtained, such as stable material discharge and a large capacity increase of the storage hopper. In addition, prevention of material accumulation on sliding parts,
By scraping up the material, it was possible to improve the pushing-in efficiency, more excellent shelving, and prevent empty pushing.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a device for discharging storage material in a hopper according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

[Explanation of symbols]

1: storage hopper, 2: discharge screw conveyor, 3:
Bottom plate, 4: push-in plate, 5: retraction device, 6: support, 7:
Floating prevention plate, 7 ': Floating prevention plate, 8: Guide,
8 ': Guide, 9: Raised protrusion, 9': Raised protrusion

Continued on the front page (72) Inventor Yuji Segawa 12 Nishikicho, Naka-ku, Yokohama-shi, Kanagawa Prefecture Mitsubishi Heavy Industries, Ltd. Inside Yokohama Works (72) Inventor Kio Yoshida 12 Nishikicho, Naka-ku, Yokohama-shi, Kanagawa Prefecture Mitsubishi Heavy Industries, Ltd. Inside Yokohama Works (72) Inventor Yoichi Kondo 6-8, Makiyama Shinmachi, Tobata-ku, Kitakyushu-shi, Fukuoka Prefecture Inside Kondo Alloy Machinery Co., Ltd. (56) References JP-A-50-71061 (JP, A) JP-A-61-110641 (JP, U) J. 34-12337 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65G 65/30-65/48 B65D 88/68

Claims (1)

(57) [Claims] At least one discharge screw conveyor is provided at a lower portion of the storage hopper, and a slidable push plate facing the discharge screw conveyor is provided on a bottom plate of the storage hopper. Discharging of the storage material in the hopper, characterized in that the protrusions for scraping up the material deposited between the support portion of the push-in plate and the support portion of the push-in plate are provided at appropriate intervals and are integrally provided on the support portion of the push-in plate. apparatus.