JPH10310195A - Method and device for preventing bridging in hopper for granular material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for perfectly preventing bridging of a granular material generated in a hopper regardless of the bridging positions in the hopper, without providing unnecessary notches in the hopper for storing the granular material and discharging it from the lower discharge opening. SOLUTION: A steel bar 3 partly deformed to shape a projection at the front end is arranged so as to turn the front end downward and extend along the inclined side wall in a hopper 2 holding a granular material such as iron ore, cokes, or alloy and discharging necessary volume thereof through a gate equipped in the lower part, and the rod of a hydraulic cylinder 4 arranged at the upper part of the hopper 2 is connected at the other end. The steel bar 3 connected to the rod is vertically actuated along the side wall of the hopper 2 by the movement of the cylinder 4 interlocked with the opening movement of the discharge opening gate 5 of the hopper 2 to smoothly discharge the granular material held in the hopper from the discharge opening at the lower part of the hopper, without bridging it in the hopper.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for mechanically preventing and eliminating shelving of granular ore, such as iron ore, coke and alloy, from a hopper. It can be widely used in the mining industry that handles lumps and the like.

[0002]

2. Description of the Related Art FIG. 1 is a view showing a hopper for cutting out granular or the like such as iron ore, coke, and alloy. FIG.
In the above, 2 is a hopper and 1 is a granular material.
Then, stagnation of agglomerates generally referred to as shelf a occurs in the cutout of the hopper. That is, a phenomenon occurs in which the granules form an arch due to the “gluing” of the granules at the time of cutting, and the granules are no longer cut out. This is generally called shelf racking. Reference numeral 5 denotes a cutout opening / closing gate for cutting out granular material or the like from the cutout.

Conventionally, it is difficult to cut out the granular material 1 or the like smoothly from the hopper 2. In order to solve the problem, a method of manually removing the shelf portion of the granular material 1 with a stick and removing the shelf is disclosed in JP-B-55-22361. Patent Publication (Patent No. 1032360)
As shown in the example of above, the hook-shaped hammer moves forward and backward into the chute by the operation of the fluid pressure cylinder from the cutout provided in the chute near the shelf where the hammer breaks on the shelf line in the range of hammer retreat. By doing so, shelving has been prevented and eliminated.

The aforementioned conventional method (Japanese Patent No. 1032360)
In order to provide a notch large enough to allow the hammer to advance and retreat on the chute near the shelf line, and to break the shelf with the rotating hammer, if shelving occurs in a location beyond the range of movement of the hammer Shelf cannot be destroyed. Also, since there is always a gap between the hammer and the notch, it is difficult to completely prevent powder from entering the inside of the chute or hopper. It is easy to cause the accumulation of dust and the malfunction of cylinders and hammers, which makes it difficult to completely prevent and eliminate shelving.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention is not limited to the position of shelving in a hopper,
Provided is a method and an apparatus for completely preventing and eliminating shelving of granular agglomerates generated in a hopper without providing unnecessary cutouts in a hopper or the like for storing and aggregating the granular agglomerates from a lower outlet. As an issue.

[0006]

SUMMARY OF THE INVENTION A feature of the method and apparatus for preventing shelving according to the present invention is that a steel rod having a tip partially deformed into a protruding shape along an inclined side wall inside the hopper. The tip of the cylinder is connected to the opening of the hopper outlet gate by connecting the rod part of the fluid pressure cylinder arranged at the top of the hopper to the other end with the tip end facing downward and near the hopper outlet. By the operation, the steel rod connected to the rod section rises along the side wall of the hopper, so that the granular mass stored in the hopper is not shelved in the hopper, and the outlet at the lower part of the hopper is not moved. It is characterized in that it is cut out smoothly from.

[0007] As described above, the long steel rod covering almost the entire area from the entrance to the exit of the hopper is arranged along the side wall inside the hopper, so that the steel rod is not affected by the shelving position. A hydraulic cylinder with a stroke that allowed the tip of the bar to move from the hopper outlet to the top of the hopper caused the steel bar to move along the inner wall of the hopper and was caught by a protrusion at the tip. The agglomerates are agitated and the shelf condition is completely destroyed. Further, according to the present invention, the cut-out portion is not provided at all in the hopper containing the granular material, and the driving mechanism and the cylinder are arranged at the upper portion of the hopper. Therefore, the effect of preventing and eliminating shelving can be enjoyed for a long period of time.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to the drawings. FIG. 2 shows the iron ore and coke of the present invention,
It is a figure of the hopper for cutting out the granular material etc., such as an alloy, and (a) is a figure which shows the state which arrange | positioned the steel rod along the inclined side wall inside the hopper, (b)
FIG. 4 is a view showing a state in which a steel rod is raised along a side wall of a hopper by operation of a cylinder. As shown in FIG. 2, along the inclined side wall inside the hopper 2, a long steel rod 3 whose tip is partially deformed into a protruding shape has a tip directed downward and near the hopper outlet. It is arranged.
The shape of the tip of the steel rod 3 is preferably a protrusion such as a hook or an L-shaped cross section. That is, by forming the tip of the steel rod into such a projection shape, when the steel rod 3 is pulled upward by the operation of the fluid pressure cylinder 4, the diameter of the projection at the tip is about 10 to 100 mm. Can be hooked, and a stirrer action occurs on the hooked granules, thereby preventing and eliminating shelving of the granules.

A long steel rod 3 arranged in the hopper 2 is used to cut out the granular material 1 stored in the hopper 2 from the outlet at the lower part of the hopper 2 in the direction of the arrow, so that a gate 5 is provided.
Is controlled by the control device so as to be pulled up by the fluid pressure cylinder 4 in conjunction with the opening of.

An example of the control device will be described with reference to FIG.
Note that the control device used in the present invention is not limited to this example, and a control device having electric or mechanical means equivalent to operating a commonly used cylinder can be used.

FIG. 3 is a view showing an example of the supply of fluid to each of the shelving prevention fluid pressure cylinder 4 and the gate opening / closing cylinder. The interlocking of the hydraulic cylinder 4 for opening and closing the gate 5 and raising the steel prevention 3 is shown. Fluid is simultaneously supplied to the gate opening / closing cylinder 7 and the fluid pressure cylinder 4 by the switching valve 6 in order to cut out the granular material from the hopper. Although the fluid is branched to each cylinder, the speed of the fluid pressure cylinder 4 is controlled by the speed controller 8. In this example, 5 to 10 m /
It is set to be between minutes.

A plurality of apparatuses having this configuration may be provided in one hopper, and even if one apparatus is provided, the effects of preventing and eliminating shelving can be sufficiently obtained.

[0013]

According to the present invention, shelving can be prevented and eliminated more reliably than in the conventional method. For this reason, it is not necessary to secure workers due to the failure of the shelves to break the granular mass, and the effect in labor saving is extremely remarkable.
In addition, since there is no need to cut out the hopper, it is advantageous in terms of equipment cost, and the practical value is extremely high.

[Brief description of the drawings]

FIG. 1 is a diagram of a conventional hopper for cutting out granular or the like such as iron ore, coke, and alloy.

FIG. 2 is a view of a hopper for cutting out granular or the like such as iron ore, coke, and alloy according to the present invention.

FIG. 3 is a diagram showing an example of fluid supply to each cylinder in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Granulated material 2 Hopper 3 Steel rod 4 Fluid pressure cylinder 5 Gate 6 Switching valve 7 Gate opening / closing cylinder 8 Speed controller 9 Stop valve 10 Air hose a Shelf

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Masato Chiza, 1 Kimitsu, Kimitsu City Inside Nippon Steel Corporation Kimitsu Works (72) Inventor Takashi Kobayashi 1 Kimitsu, Kimitsu City Nippon Steel Corporation Inside the Kimitsu Works (72) Inventor Junichi Kinoshita 1 Kimitsu, Kimitsu City Inside the Kimitsu Works, Nippon Steel Corporation

Claims (2)

[Claims] 1. A method for preventing shelving of a hopper, in which granules such as iron ore, coke, and alloy are stored and a required amount is cut out from a gate provided at a lower portion, a tip is formed along an inclined side wall inside the hopper. The tip of the steel rod partially deformed into a protruding shape was placed with the tip facing downward, the other end was connected to the rod of the fluid pressure cylinder located at the top of the hopper, and the gate at the hopper outlet opened. The steel rod connected to the rod part moves up and down along the side wall of the hopper by the operation of the cylinder linked to the above, so that the granular mass stored in the hopper is shelved in the hopper. A method of preventing shelving of a hopper for granular lumps, wherein the hopper is smoothly cut out from an outlet at a lower portion of the hopper without causing the hopper to be cut. 2. A device for preventing shelving of a hopper, which stores agglomerates such as iron ore, coke, and alloy, and cuts out a required amount from a gate provided at a lower portion, wherein a tip is projected along an inclined side wall inside the hopper. A steel rod partially deformed in a shape, the tip part is arranged downward, the other end is connected to the rod part of the fluid pressure cylinder arranged at the top of the hopper,
In conjunction with the opening of the hopper exit gate, a control device is provided for moving the steel bar connected to the rod portion up and down along the side wall of the hopper by the operation of the cylinder, and is stored in the hopper. An apparatus for preventing shelving of a hopper for granular lumps, wherein the granulated lumps are smoothly cut out from an outlet at a lower portion of the hopper without being shelved in the hopper.