JPS59133120A - Powdery granule discharging device for holding tank thereof - Google Patents

Abstract

PURPOSE:To make a residual powdery granule dischargeable with certainty, by stretchably installing a porous ventilating platelike body, partitionarily forming a powdery granule holding chamber at the top side, in a tank, while setting up air capable of jetting air for powdery granule fluidization to the peripheral part of this platelike body. CONSTITUTION:In the case where powdery granules inside a tank 10 are discharged out of the tank, first a main on-off valve 28 is opened, then air is pressed in an air chamber A via a main air feed pipe 27, and this air is made to flow into a powdery granule holding chamber B after making it permeate a porous ventilating platelike body, thereby fluidizing the powdery granules inside the chamber B. After that, the fluidized powdery granules are discharged outside the tank 1 via a discharge pipe 35. Next, the main on-off valve 28 is closed while an auxiliary on-off valve 30 is opened, and thereby air is forced by pressure into an auxiliary air chamber 33 by way of an auxiliary air feed pipe 29, an air pipe 31 and the like. Then, the air inside this chamber 33 is made to burst forth at the inside of the holding chamber B passing through an opening 34 whereby the powdery granules left over on top of the peripheral edge part of the platelike body 22 are all fluidized and discharged by the air burst forth again from the air chamber A.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized in that the powder and granules in the powder and granule storage chamber are completely fluidized by air sent into the powder and granule storage chamber through a porous ventilation plate-like body. When discharging, air is auxiliary jetted from the periphery of the porous ventilation plate toward the powder storage chamber to ensure that the powder remaining on the periphery of the porous ventilation plate is removed. This invention relates to a powder discharge device for a powder storage tank that can discharge 11r of powder and granule material.

Conventionally, the powder and granules in the powder and granule storage chamber were completely fluidized by air introduced into the powder and granule storage chamber through a porous ventilation plate.
- In a powder storage tank in which the powder is discharged from the powder storage chamber, powder tends to remain in the periphery of the porous ventilation plate, and this residual powder must be reliably discharged. I couldn't do that.

FIG. 1 shows an example of the main parts of a conventional powder storage tank. The powder book storage tank 1 has a lower outer shell 2 and an upper outer shell 3, and a central member 4 is disposed at the center of the lower bottom of the lower outer shell 2. A large number of supporting bone members 6 are arranged radially between the central portion 4 and the vicinity of the connection portion 5 of both the upper and lower outer shells 2.3. A porous ventilation plate-like body 7 made of a material such as canvas is stretched over the upper surface side of each supporting frame member 6 so as to be fixed by each supporting frame member 6 . This porous ventilation plate-like body 7 (l-1
The material is made of a material that allows air to pass freely through it, but does not allow powder particles such as silica sand or quicklime to pass through, and has an annular shape with the center member 4 at its center.

The inner circumferential edge 7a of the porous ventilation plate-like body 7 is fixed on the center member 4 by a fastener 9 configured to be tightened onto the center member 4 by a bolt 8, and The outer peripheral edge 7b of the ventilation plate-like body 7 is pressed by the suppression ring 11 onto the annular holding member 1o having a corrugated cross-sectional shape, which is disposed near the connecting portion 5 on both the upper and lower sides e2.3. It is fixed in such a way that it can be

In this way, an air chamber A' is formed on the lower surface of the porous ventilation plate 7, and a powder storage chamber B' is formed on the upper surface of the porous ventilation plate 7. In the air chamber A',
The opening 14 of the air pipe 12 including all the on-off valves 13 is in communication.

When air is forced into the air chamber A' through the air pipe 12, the air that is forced into the air chamber A' further passes through the porous ventilation plate 7 and enters the powder storage chamber B. ', the powder and granules in the powder storage chamber B' are fluidized and discharged toward a discharge pipe (not shown).

At this time, the porous ventilation plate-like body 7 between the supporting frame members 6 is pressed by air pressure and curves upward as shown by the chain line 7', so that the outer peripheral edge of the porous ventilation plate-like body 7 The degree of inclination decreases, and as a result, powder and granules remain above the outer peripheral edge of the porous ventilation plate 7 as shown by the chain line 15, and this residual powder and granules (ri, air From chamber A' side to powder storage chamber B'
It remains as it is without being easily fluidized by the air that flows to the side.

In view of the above-mentioned inconveniences of conventional devices, the main purpose of the present invention is to reliably fluidize the remaining powder ingot so that all the powder and granules in the powder storage chamber can be completely discharged. An object of the present invention is to obtain a powder discharge device for a powder storage tank.

Embodiments of the present invention will be described below with reference to the drawings.

First, in FIGS. 2, 3, and 4, the powder storage tank 16 has a lower outer shell 17 and an upper outer shell 18,
A central member 19 is disposed at the center of the lower bottom of the lower outer shell 17. This central member 19 and both upper and lower outer shells 17.18
A large number of supporting bone members 21 are arranged radially between the connecting portion 2° and the vicinity thereof.

A porous ventilation plate-like body 22 made of a material such as canvas is stretched on the upper surface side of each supporting frame member 21 so as to be fixed by each supporting frame member 21 . The porous ventilation plate-like body 22 is made of a material that allows air to freely pass through but does not allow powder particles such as silica sand or quicklime to pass through, and has an annular shape centered on the center member 19. ing. The inner peripheral edge 22a of the porous ventilation plate-like body 22 is fixed on the center member 19 by a tightening member 24 configured to be tightened onto the center member 19 by a bolt 23, and The outer peripheral edge 22b of the plate-shaped body 22 is
The cross-sectional shape of the upper and lower outer shells 17.1B disposed near the connecting portion 20 is fixed onto the corrugated annular holding member 25 so as to be pressed by a pair of pressing rings 26.26'. There is.

In this way, the air chamber A is formed on the lower surface side of the porous ventilation plate-like body 22, and the powder storage chamber B is formed on the upper surface side of the porous ventilation plate-like body 22, and the air chamber A communicates with the compressor C (7, an opening 2γσ of a main air pipe 27 equipped with a main on-off valve 28 in the middle).

From the main on-off valve 28 of the main air pipe 27, an auxiliary air pipe 29 with an auxiliary on-off valve 30 is branched off from the upstream side of the main on-off valve 28. It communicates with an air guide pipe 31 arranged so as to wrap nine times around the circumference. The air guide pipe 31 is connected to an annular pipe formed between the lower outer shell 17 and the annular holding member 25 via a large number of air distribution pipes 32 arranged at intervals along the circumferential direction of the lower outer shell 17. The annular holding member 25 is formed with an opening 34 along the circumferential direction, and the air sent into the auxiliary air chamber 33 is communicated with the auxiliary air chamber 33 (2). It is configured to be ejected into the powder storage chamber B.

Since the embodiment shown in FIGS. 2 to 4 is constructed as described above, first, the auxiliary on-off valve 30 is closed, the main on-off valve 28 is opened, and the main air pipe 27 is completely passed through to the air chamber A. When air is forced into the air chamber A, the air passes through the porous ventilation plate 22 and flows into the powder storage chamber B.
The fluidity ratio of the powder and fluid in the powder storage chamber B is determined. The powder fluidized in the powder storage chamber B is guided into the discharge pipe 35 through the discharge port 36 of the discharge pipe 35 extending into the powder storage chamber B, and is then discharged by the discharge pipe 35. It is discharged to the outside of the powder storage tank 1.

After that, the main on-off valve 28 is closed and the auxiliary on-off valve 30 is opened (and the air is transferred to the auxiliary air pipe 29, the air guide pipe 31, and the air distribution pipe 32).
is press-fitted into the auxiliary air chamber 33, and this auxiliary air chamber 3
The air press-fitted into the porous ventilation plate 22 is ejected into the powder storage chamber B through the opening 34, thereby removing the powder remaining on the outer periphery of the porous ventilation plate 22. Fluidize. Then, the auxiliary on-off valve 30 is closed again, and the main on-off valve 28
When opened, the air that passes through the porous ventilation plate 22 from inside the air chamber A and flows into the powder storage chamber B further fluidizes the residual powder in the powder storage chamber B. While speeding up the process, the remaining powder is discharged to the outside of the powder storage tank 1 through the entire discharge pipe 35.

If fluidization of the residual powder is insufficient, the main on-off valve 28 and the auxiliary on-off valve 30 are further operated to alternately pressurize air into the auxiliary air chambers 33 or the air chambers AK.

Further, depending on the case, air may be sent to the air chamber A and the auxiliary air chamber 33 at the same time.

FIG. 5 shows an auxiliary air chamber 33 and an air chamber A instead of the auxiliary air pipe 29, the air guide pipe 31, and the air distribution pipe 32 in the embodiment shown in FIGS. 2 to 4. An alternative embodiment is shown for the case of communication. In the embodiment shown in FIG. 5, when the air is fully pressurized into the air chamber A through the entire air supply pipe 27, the air chamber A and the auxiliary air chamber 3 are
Air also flows into the auxiliary air chamber 33 through the entire communication section with the air conditioner 3.

As a result, the air blown out from the auxiliary air chamber 33 through the opening 34 promotes the fluidization of the powder and granules that tend to remain on the outer peripheral edge of the porous ventilation plate 22, while the air chamber A The air that completely passes through the ventilation plate-like body 22 and flows into the powder storage chamber B fluidizes the entire powder and granule in the powder storage chamber B and stores the powder through the discharge pipe 35. There will be a hole to drain outside of tank 1.

In the present invention, the porous ventilation plate-like body 22 may be a plate with many fine holes bored outside the canvas, and the cross-sectional shape of the annular holding member 25 is as follows. It does not necessarily have to be corrugated, and any shape that can form the auxiliary air chamber 33 with the lower outer shell 17 may be used.

As described above, according to the present invention, all the air is injected onto the peripheral edge of the porous ventilation plate toward the upper surface of the porous ventilation plate in order to completely fluidize the residual powder. Since the auxiliary air chamber is provided, the residual powder can be reliably fluidized, and the powder in the powder storage chamber can be completely discharged.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a main part showing an example of a powder discharge device of a conventional powder storage tank, and FIG. 2 is a powder discharge device equipped with a powder discharge device according to an embodiment of the present invention. 3 is a side view of the main part of the storage tank, FIG. 3 is a horizontal sectional view of the main part showing the powder discharge device of the powder storage tank shown in FIG. 2, and FIG. 4 is a main part of the powder discharge device of the powder storage tank shown in FIG. Fig. 5 is a longitudinal sectional view of a main part of a powder discharge device according to another embodiment of the present invention. 16... Powder storage tank 22... Porous ventilation plate-like body 33... Auxiliary air chamber A... Air chamber B... Hanging grain storage room Patent applicant Kyokuto Kaihatsu Kogyo Co., Ltd.

Claims (1)

[Claims] A porous ventilation plate-like body 22 is stretched inside, and a powder storage chamber B is formed on the upper surface side of the porous ventilation plate-like body 22. An air chamber A is formed on the lower surface side, and by pressurizing air into the air chamber A, air is passed through the porous ventilation plate-like body 22 and sent into the powder storage chamber B. The powder discharge device for the powder storage tank 16 is configured such that the air introduced therein fluidizes the powder in the powder storage chamber B and discharged the same to the outside. An auxiliary air chamber 33 is provided at the peripheral edge of the plate-like body 22 and is capable of injecting air toward the upper surface of the porous ventilation plate-like body 22 to fluidize the residual powder. A powder discharge device for a powder storage tank.