JPS5812171B2 - Shindoshiki Teiriyohaishiyutsuki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibrating ejector with excellent quantitative performance.

In continuous noodle making systems, etc., a technology is required to continuously and quantitatively discharge granular raw materials such as flour stored in storage tanks and supply them to the next processing step. The reality is that the vibrating ejector most commonly used for this purpose is unfavorable in terms of quantitative performance.

In other words, the most typical conventional vibrating discharge machine is
A part of the hopper is flexibly connected to a storage tank for storing powder and granular materials via a flexible joint, etc., and a vibration motor is attached to the outer wall of the part of the hopper to vibrate part of the hopper. A pressure receiving plate with a wide area is installed in the center of the interior to support the powder and granules inside the storage tank, and the powder and granules are discharged from the outlet provided at the center of the lower part of the hopper. The powder pressure applied to the storage tank varies depending on the height of the powder stored in the storage tank from the outlet or pressure plate.
Therefore, the discharge amount is affected by this powder pressure, and therefore varies, making quantitative performance poor.

Taking wheat flour as an example, the variation in discharge amount is about ±10% when the height of the powder in the storage tank gradually decreases, and ±25% when the powder is added because it is directly affected by the powder pressure. reach even.

In the present invention, we focus on the fact that the cause of variation in the amount of discharge, that is, poor quantitative performance, is due to changes in the influence of powder pressure on the powder and granules near the discharge port. To this end, we installed an annular pressure receiving plate along the inner wall of a part of the hopper, and this pressure receiving plate partially overlaps the pressure receiving plate in the center of the hopper part. In order to ensure that the powder passes between these two pressure receiving plates and moves to the discharge port, changes in powder pressure due to changes in the height of the powder and powder when the powder is introduced are prevented. A sudden increase in body pressure is received by these two pressure receiving plates and does not directly affect the powder near the outlet, so the pressure applied to the powder near the outlet is always almost constant and has good quantitative properties. Ejection becomes possible.

By using the discharging machine according to the present invention, continuous quantitative discharging is possible in combination with level control using a level meter.In addition, conventionally, a large discharging machine had to be used to achieve quantitative discharging, but this invention The use of the discharger of the invention has extremely significant effects, such as simplifying the equipment and making related equipment more compact.

Now, the present invention will now be described in detail with reference to the accompanying drawings.

The drawing schematically shows a vibratory discharge machine according to the present invention, which comprises a hopper part 3 connected via a flexible joint to the lower part of a storage tank 2 for storing fine particles 1. A vibration motor 4 is provided on the outer wall of the hopper part 3 to give vibration to the hopper part 3, and inside the hopper part 3 there is a circular or slightly curved surface that supports a considerable amount of powder 1 in the center. A first pressure receiving plate 5 having an elliptical shape is provided, and a second pressure receiving plate 6 having an annular shape is attached along the inner periphery of the hopper part 3 above the first pressure receiving plate 5.
A portion of the second pressure receiving plate 6 (that is, the outer circumferential portion of the pressure receiving plate 5 and the inner circumferential portion of the pressure receiving plate 6 overlap in plan view).

Since the pressure plates 5 and 6 are provided at different heights from the bottom of the hopper part 3, a space is formed between the pressure plates 5 and 6 through which the powder 1 can pass and move.

It is extremely important to overlap both pressure receiving plates 5 and 6 two-dimensionally in this way and positioning the second pressure receiving plate 6 above the first pressure receiving plate 5 in order to realize discharge with good quantitative properties. .

This means that changes in the powder pressure due to changes in the height of the powder and changes in the powder pressure when the powder is introduced do not directly affect the powder discharged from the discharge lower. This is because evacuation is performed under a substantially constant force that is unrelated to the magnitude of body pressure.

Two level gauges L1 and L2 are installed at appropriate positions in storage tank 2.
When installing, the level meter L2 operates instantly when the height of powder 1 becomes less than H2, and the powder is supplied into the storage tank, and as a result, the height of the powder rises and exceeds H1. Sometimes level meter L1
operates and stops the supply, and the height of the powder and granules is always H1 and H2.
Level decoration is done as shown in between.

Since the methods of supplying and discharging the powder and granular material are not the gist of the present invention, explanations thereof have been omitted.

In the discharging machine of the present invention having the above configuration, most of the weight of the granular material 1 is received by the first pressure receiving plate 5 and the second pressure receiving plate 6, and in other words, the weight due to the change in the height of the granular material is Changes in powder pressure do not affect the powder passing between the pressure receiving plates 5 and 6, and therefore have almost no effect on the powder discharged from the discharge lower.

This is exactly the same even when the height of the granular material becomes less than H2 and the supply of the granular material suddenly starts and the pressure receiving plates 5 and 6 momentarily receive a large force.

As an example, the first pressure receiving plate 5 is a circular plate with an outer diameter of 380 mm,
The second pressure-receiving plate is a donut-shaped plate with an outer diameter of 400 mm and an inner diameter of 360 mm, and the vertical distance between the first and second pressure-receiving plates 5.6 is 20 mm, and flour is discharged at a rate of 250 kg/hour. The variation is 2°5% above, which is a significant improvement compared to the variation of ±10% with conventional dischargers of this type.

In addition, in the above experimental example, the variation in flour input, which is said to have a particularly large variation in discharge amount, is due to the height of the flour
Even when it was added at 2 o'clock, it was within +2.5%.

According to the present invention, a disk-shaped first
and an annular second pressure receiving plate are provided along the inner wall of a part of the hopper, the second pressure receiving plate is provided above the first pressure receiving plate, and the outer peripheral part of the first pressure receiving plate is By arranging it so that it overlaps the inner peripheral part of the second pressure receiving plate in a plan view, it is possible to always discharge with good quantitativeness regardless of the height of the powder or the change in powder pressure due to the addition of powder or granules. becomes possible.

In addition to being arranged horizontally as shown in the drawings, the second pressure receiving plate 6 may of course be partially inclined inward of the hopper, and the angle of inclination is preferably 0° to 45°.

[Brief explanation of drawings]

The accompanying drawings are diagrams schematically showing the configuration of a quantitative discharge machine according to the present invention. 1... Powder, 2... Storage tank, 3...
...Part of hopper, 4...Vibration motor, 5...
...first pressure receiving plate, 6...second pressure receiving plate,
7...Discharge port, Ll, L2...Level meter, H1, H2...Height of powder and granular material.

Claims (1)

[Claims] 1. A part of a hopper which is flexibly connected to a storage tank for storing powder and granules and has a powder discharge port at the bottom, an excitation motor attached to the outer wall of this part of the hopper, and a central part of the hopper. and a substantially circular first pressure receiving plate provided above the discharge port, and an annular second pressure receiving plate provided along the inner wall of a part of the hopper, and the second pressure receiving plate is 1st
A vibrating quantitative dispensing machine disposed above a pressure receiving plate, wherein an outer circumferential portion of the first pressure receiving plate and at least an inner circumferential portion of the second pressure receiving plate overlap in plan view.