JPS63294388A - Method for breaking bridging of particulate material - Google Patents

Abstract

PURPOSE:To always accurately measure the level of a particulate material correspond ing to the accumulation amount thereof, in a level measuring device for measuring a level in such a state that a weight is suspended from the leading end of a wire, by allowing the weight to fall at a high speed to break bridging of material. CONSTITUTION:A level measuring device 3 is constituted of a sounding type level meter having a wire 1, a weight 2, a level detector 5 and a wire rising and falling drive part 6 and a wire rising and falling speed control mechanism 7. When a level is measured, the wire rising and falling speed control mechanism 7 is set to a low speed side and the wire 1 is allowed to fall at a low speed by the wire rising and falling drive part 6 and the weight 2 is brought into contact with a level 8 and the tension change of the wire 1 at that time is detected by the level detector 5 to measure the level 8. The wire 1 is hung up by proper quantity by the wire rising and falling drive part 6 to change over the wire rising and falling speed control mechanism 7 to a high speed side and the wire 1 is allowed to fall at a high speed by the wire rising and falling drive part 6 and the weight 2 is allowed to collide with the level 8 to gradually break bridging of material 4. The above mentioned operation is repeated several times and the accurate level 8 not in a bridging state can be measured.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for destroying shelving that occurs in various devices that accumulate powder and granular materials, such as melting furnaces and silos.

(Prior art and its problems) In various types of equipment that accumulate powder and granular materials, such as melting furnaces and silos, shelf hanging often occurs, and when this shelf hanging occurs, even if the powder and granular material is taken out from below the equipment, , only a cavity is created below the hanging shelf, and the level of powder and granular material does not decrease.
Therefore, even if the level is measured with a level measuring device, it is not possible to accurately measure the level corresponding to the accumulated amount of powder and granules, and furthermore, there are problems such as difficulty in replenishing the powder and granules.

For this reason, conventionally, it was necessary to visually monitor the occurrence of shelf hanging at all times, and once shelf hanging occurred, it was necessary to manually destroy the shelf hanging, and it was necessary to remove the powder and granular material. There was a problem in that it was difficult to automate the process up to input.

The present invention aims to solve such problems.

(Means for Solving the Problems) The configuration of the present invention will be explained based on FIGS. 1 and 2 corresponding to the embodiment. In the level measuring device 3, the weight 2
The shelf suspension 4 is destroyed by falling at high speed.

(Function) Next, the function of the method of the present invention will be explained with reference to Examples. In the figure, the level measuring device 3 includes a sounding type level meter having a wire 1, a weight 2, a level detecting section 5, and a wire lifting/lowering drive section 6, and a wire lifting/lowering speed adjusting mechanism 7.

First, when measuring the level, the wire lifting speed adjustment mechanism 7 is set to the low speed side, the wire 1 is suspended at low speed by the wire lifting drive unit 6, the weight 2 is brought into contact with the level 8, and the tension of the wire 1 changes at that time. is detected by the level detection section 5, and level 8 is measured.

However, since it is not known whether level 8 at the time of this measurement is the level at which the shelf-hanging phenomenon occurs, the wire 1 is next lifted by an appropriate amount using the wire lifting/lowering drive unit 6, and then the wire The lifting speed adjustment mechanism 7 is switched to the high speed side, and the wire 1 is suspended at high speed by the wire lifting/lowering drive unit 6, and the weight 2 is caused to collide with the level 8. In this way, the shelf hanger 4 is gradually destroyed by the impact force of the weight 2.

Repeat the above operation multiple times as necessary, and confirm that level 8 is stable and the shelf suspension is destroyed to the desired degree f(!LW
By doing this, it is possible to measure the correct level 8 that is not in a hanging state.

In the above configuration, the weight 2 may be a heavy object that has impact resistance that does not deform even if it collides with a level 8, for example, it may be composed of one or more metal weights, or it may be constructed of a high heat source such as a melting furnace. When used in a device that generates heat, it may be constructed as appropriate, such as using a material with a small coefficient of thermal expansion and excellent heat resistance.

Further, the wire lifting/lowering drive section 6 can be easily configured with a reversible motor or the like whose rotation direction can be freely changed. Next, the wire lifting/lowering speed adjusting mechanism 7 may be any suitable mechanism as long as it can freely switch the hanging speed of the wire l between low speed and high speed. For example, the mechanism shown in FIG.
one set each of wire holders 9a above and below;
9b and move laterally in the middle thereof,
The structure includes a tension roller 10 that allows the wire 1 to move up and down, and a fixed roller 11 that serves as a fulcrum for raising and lowering the wire 1. The wire lifting/lowering speed adjusting mechanism 7 with this configuration is as follows:
When measuring the level, both wire holders 9a and 9b are opened, the tension roller 10 is moved to the left, the tension roller 10 is separated from the wire 1, and the wire 1 is suspended at a low speed by the wire lifting/lowering drive unit 6. be. On the other hand, when the shelf is suspended, the wire 1 is restrained by closing the upper wire holder 9a with the weight 2 in contact with the level 8, and the tension roller 10 is moved to the right to lift the wire 1. Next, after closing the lower wire holder 9b,
The tension roller 10 is returned to its original position on the left side, and then the lower wire holder 9b is opened, and the wire 1 and the weight 2 are suspended at high speed by their own weight. At this time, by appropriately adjusting the length of the wire l below the upper wire holder 9a, it is possible to prevent the weight 2 from sinking excessively below the level 8, and also to prevent the weight 2 from sinking below the level 8. By adjusting the amount of movement of the weight 10 to the right, the falling height of the weight 2 can be adjusted, so the impact force at the time of a collision can be easily changed.

In addition, the wire lifting/lowering speed adjusting mechanism 7 can also be configured with a speed change gear, a clutch, or the like.

(Effects of the Invention) As described above, the present invention destroys the shelf suspension with the weight of the level measuring device itself, so such destruction can be performed as necessary when measuring the level, so that the shelf suspension phenomenon can be prevented by manual effort. There is no need to monitor the amount of granular material or to break shelves, and the level corresponding to the accumulated amount of granular material can be accurately measured at all times in various devices that accumulate granular material such as melting furnaces and silos. Therefore, when the present invention is applied, it is possible to easily automate the process from taking out the powder to putting it into the various devices.

[Brief explanation of the drawing]

All figures correspond to embodiments of the present invention, with FIG. 1 being a schematic overall explanatory diagram, and FIG. 2 being a diagram illustrating in detail an example of a wire lifting/lowering speed adjusting mechanism. Code 1... Wire, 2... Weight, 3... Level measuring device, 4... Shelf hanging, 5... Level detection section, 6...
Wire lifting/lowering drive unit, 7...wire lifting/lowering speed adjustment mechanism,
8...Level, 9 (a, b)...Wire holder, 10...Tension roller, 11...Fixed roller.閑1'jJ) N-) ME's Y↓kidney/proof leather 2 figure

Claims (1)

[Claims] 1. A method for breaking a shelf suspension, in a level measuring device that measures a level by suspending a weight from the tip of a wire, the weight being lowered at high speed to destroy the shelf suspension.