JP2000344350A - Powdery and granular material storing chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To freely set the speed of a gas spouted from each nozzle, the cyclic period of gas spouting etc. SOLUTION: Each of gas spout nozzles 10B, 10D, 10E, etc., is equipped with a solenoid opening/closing valve and pressure regulator, and by controlling them, it is possible to change the speed of the gas spouted from the jet nozzle 9 of the nozzles 10B, 10D, 10E, etc., or freely set the cyclic period of gas spouting out of the jet nozzle 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a granular material storage tank.

[0002]

2. Description of the Related Art Heretofore, the following are known as this kind of powder and particle storage tank. An upper cylindrical body, and a powder and granular material storage tank having a lower part of a lower constriction connected to a lower edge of the cylindrical main body and having a discharge port at a lower end, the vicinity of the discharge port. It is known that a ball-shaped gas ejection nozzle having a large number of gas ejection ports is rotatably provided so as to be positioned (Japanese Patent Laid-Open No. 10-310252).
Reference). Since this powder storage tank can blow gas onto the powder that is likely to cause a bridging phenomenon just above and near the discharge port, the bridging phenomenon of the powder at the lower part of the powder storage tank is prevented. It is something that can be done.

[0003]

Disadvantages of the prior art The above-mentioned conventional granular material storage tank has the following disadvantages. Since the gas is simultaneously ejected from a large number of gas ejection ports formed in the ball-shaped gas ejection nozzle, it is difficult to change the speed of the gas ejected from each gas ejection port. there were.
Also, by intermittently supplying gas to the gas ejection nozzle, gas is simultaneously ejected from the gas ejection port,
There is a drawback that the timing at which the gas is ejected from each gas ejection port cannot be shifted (differentiated) even if the gas ejection can not be performed at the same time.

[0004]

The present invention employs the following means to solve the above-mentioned drawbacks. The invention according to claim 1 is a powdery and granular material storage tank having an upper cylindrical main body and a lower part of a lower narrow part having a discharge port at a lower end and being connected to a lower edge of the cylindrical main body, At least two gas ejection nozzles are provided near the discharge port, and gas is supplied to each of the gas ejection nozzles separately and independently.

[0005]

According to the present invention, the following effects can be obtained by the above configuration. According to the first aspect of the present invention, since the gas is supplied to the gas ejection nozzle separately and independently, the velocity of the gas ejected from each gas ejection nozzle according to the type of the granular material and the like.・ The cycle of gas ejection can be set freely.

[0006]

Embodiments of the present invention will be described below. The granular material storage tank 1 is provided with an arbitrary cross-sectional shape, for example, an upper cylindrical body 1a having a circular cross section and a lower edge of the cylindrical main body 1a. Lower part 1b of a downward tapering having a circular outlet 2
And In the upper part of the tubular main body 1a, an entrance 3
Is detachably provided by known means. As is well known, the outlet 2 and the inlet 3
A powder conduit and a guide cylinder are connected. Powder storage tank 1
, Powder and granules are stored.

A collecting nozzle body 8 is attached to a lower end of a gas conduit 6 which penetrates the lid 4 and has a lower end near the upper portion of the discharge port 2.

[0008] The collecting nozzle body 8 has at least two
Specifically, five gas ejection nozzles 10A to 10E are integrated. That is, five gas ejection nozzles 10 </ b> A to 10 </ b> E are integrally provided in the collective nozzle body 8. Each of the gas ejection nozzles 10A to 10D has at least one, specifically, two upper and lower gas ejection ports 9. As shown in FIG. 4, the gas ejection ports 9 of each of the gas ejection nozzles 10A to 10D are open on the side peripheral surface of the collective nozzle body 8, and the gas ejected from these gas ejection ports 9 is directed in the direction of arrow L. Imaginary line M connecting the center of the collective nozzle body 8 and the center of the gas ejection port 9
On the other hand, a gas passage reaching the gas ejection port 9 is formed in the collective nozzle body 8 so as to form an angle α (0 degree <α <90 degrees) when viewed from a plane. As shown in FIG. 2, the gas ejection port 9 of the gas ejection nozzle 10E is formed downward.

The gas conduit 6 has gas ejection nozzles 10A to 10A
Non-communicating gas passages 12 corresponding to 10E
Are formed, and each gas passage 12 is connected to a gas supply source (not shown) for supplying a compressed gas via an electromagnetic on-off valve (not shown) and a pressure regulator (not shown). With such a configuration, by controlling an electromagnetic on-off valve (not shown) and a pressure regulator (not shown) provided for each of the gas ejection nozzles 10A to 10E, the gas ejection port 9 of each of the gas ejection nozzles 10A to 10E is controlled. It is possible to freely change the speed of the gas ejected from the nozzle, and freely set the cycle of the gas ejected from the gas ejection port 9 of each of the gas ejection nozzles 10A to 10E. For example, among the gas ejection nozzles 10A to 10D, the gas is ejected only from the gas ejection port 9 of one of the gas ejection nozzles.
In FIG. 4, by sequentially changing in the clockwise direction, it is possible to make a state as if the ejected gas is rotating clockwise around the collecting nozzle body 8.

The lower end of the collective nozzle body 8 is located above the position below the outlet 2 by a radius of the outlet 2, and
From the upper position by a height of 2.5 times the diameter of the discharge port 2. With such a configuration, the collective nozzle body 8 is located near the outlet 2. This means that even when the collective nozzle body 8 is not provided, the collective nozzle body 8 is positioned in a space where the bridging phenomenon generally or absolutely does not occur. The position of the collective nozzle body 8 may be a position other than the above.

[0011]

[Modifications and the like] Modifications and the like of the present invention will be described below. (1) The powders and granules include powders, granules, minute flakes, short fiber pieces and the like. (2) The gas spouted from the gas spout 9 is arbitrary, such as air, nitrogen gas, and gas having a static electricity removing action. As the gas having the function of removing static electricity, generally, a gas ionized by an ionizer, a gas in which a small amount of steam is mixed and the humidity is increased, and an antistatic agent in a liquid state or a gas state are mixed. Gas or the like is used. (3) Collecting nozzle body 8 (gas ejection nozzles 10A to 10A
E) may be moved up and down in the granular material storage tank 1. (4) The gas ejection nozzles 10A to 10E may be separate from each other.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, with an intermediate portion omitted.

FIG. 2 is a cross-sectional view of a portion A in FIG.

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

FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Granule storage tank 1a Cylindrical main body 1b Lower part 2 Outlet 6 Gas conduit 8 Collecting nozzle body 9 Gas ejection port 10A Gas ejection nozzle 10B Gas ejection nozzle 10C Gas ejection nozzle 10D Gas ejection nozzle 10E Gas ejection nozzle

Claims (1)

[Claims] 1. A powdery and granular material storage tank having an upper cylindrical body and a lower portion of a downwardly tapered lower end which is connected to a lower edge of the cylindrical body and has a discharge port at a lower end. A particulate storage tank in which at least two gas ejection nozzles are provided in the vicinity of the gas ejection nozzle, and gas is supplied to each of these gas ejection nozzles separately and independently.