JPS6013671A - Feed-hopper for powdered and granular body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides powder particles that can prevent segregation of the powder particles inside the hopper and maintain a stable supply state when the powder particles are supplied by falling from the lower part of the hopper due to its own weight. Regarding the body supply hopper.

In conventional powder supply hoppers, the behavior of powder and granules during feeding progresses according to the angle of repose of the substance, but it is difficult to feed a mixture of powder and granules with different particle sizes, specific gravity, etc. In this case, there is a strong tendency for fine particles to remain and increase internal segregation, and there are many problems in uniformly supplying the powder and granules.

Conventionally, this has been dealt with by installing various types of dispersion plates inside, but this has not been sufficiently effective, especially when the hopper capacity is large or when there is a remaining amount in the hopper. This tendency is strong in hoppers that are continuously fed.

In addition, automatic supply 1 collection line using pneumatic transportation, moisture absorption 9
When using a powder hopper on a line where dust generation is a concern, the hopper may have a closed structure. In such a case, the inside of the hopper becomes negative pressure as the internal substance falls and is supplied, and the phenomenon of hanging of the internal powder and granules tends to occur, making it difficult to provide a stable supply.

The present invention aims to eliminate such drawbacks, prevent segregation in the powder hopper, and stably supply powder and granules.

An embodiment of the present invention will be described below based on the drawings. 1st
The figure shows one embodiment of the present invention.

In the figure, granular material 8 is supplied into the supply popper 2 through the supply pipe 1 with the supply valve 10 in an open state by means of compressed air. At the time of supply, the pressurized air is sent to the exhaust pipe 9. The air is sucked through the exhaust valve 11 by a blower (not shown). The supply of powder and granules is stopped due to the level detected by the upper limit level meter 12, and the supply valve 10. The exhaust valve 11 is closed. The powder 8 in the supply hopper 2 is sequentially supplied and discharged from the drop port 5 as the supply damper 14 opens.

In the present invention, in the above case, in conjunction with the opening and closing of the supply damper 14, the compressed gas is supplied from the compressed gas supply device (not shown) from the discharge lowers of the stirring pipes 6 installed in plurality facing the hopper outer wall slope part 4. The gas is discharged by the solenoid valve 15.

The discharge lower provided at the tip of the stirring pipe 6 (for example, a T-shaped branch pipe) is formed in a direction slightly downward and facing the wall in order to prevent the internal powder and granular material 8 from entering and from adhering to the slope part 4 of the hopper outer wall. It is desirable to do so, and since fine powder tends to remain near the outer wall, it is more effective to install it near the periphery and the bottom. In addition, the shape of the upper part of the stirring pipe 6 needs to have an inclination that is greater than the angle of repose of the powder and granules in order to prevent the powder and granules from remaining.

The solenoid valve 15 is a −) b −+ C−+ d −*
e -) f -+ a (!: Adjust so that the gas is discharged intermittently in the following order (if it is periodic, the order is not limited to this).The discharge time should be set for a long time. There is no need to do so, and as long as the upper powder layer is stirred, the short time is heavier, and this intermittent discharge prevents the interior of the supply popper from becoming negative pressure.

In this example, six stirring pipes 6 are installed on the outer circumference of the hopper, but the optimum stirring effect can be obtained depending on the hopper capacity, internal powder properties, etc., and considering gas pressure, discharge time, etc. As you can see, it is difficult to increase or decrease the amount as needed. Further, the discharge cycle may be adjustable in accordance with the amount of gas supplied and discharged from the drop port 5.

As specifically explained in the above embodiment, according to the device of the present invention, by intermittently and periodically supplying and discharging the nozzles, the powder and granular material in the hopper is agitated, and the powder and granules are agitated due to the falling supply. In addition to preventing internal segregation, it also prevents negative pressure in the sealed hopper due to discharged gas, prevents the fence hanging phenomenon, and enables stable continuous falling supply.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Supply pipe, 2... Supply hopper, 3... Distribution plate, 4... Hopper outer wall slope part, 5... Falling port, 6
... Stirring pipe, 7 ... Discharge port 58 ... Powder 59
...exhaust pipe, 10...supply valve, 11...exhaust valve,
12... Upper limit level meter, 13... Lower limit level a1.
14... Supply damper, 15... Solenoid valve. Patent Applicant Representative Patent Attorney Tomoyuki Yabuki (and one other person) 3-5-4 Tsukiji, Chuo-ku, Tokyo

Claims (1)

[Claims] Outside the hopper in the powder supply hopper! 5 on the periphery
A powder supply hopper characterized by being provided with a plurality of fine gas discharge ports for stirring that discharge gas intermittently and periodically.