JPH0127934B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a volume reduction device for powder and granular materials, which deaerates only the air present in the powder and granular materials (hereinafter simply referred to as raw materials), thereby reducing the volume of the raw materials. The purpose is to reduce the volume of

The present invention will be explained below with reference to Examples. 1st
In the figure, reference numeral 1 denotes a housing, with a raw material supply port 7 provided at the top and a product discharge port 8 provided at the bottom. A short pipe 10 is provided above the supply port 7, and a hopper (not shown) is passed through the short pipe 10.
A storage section for powder and granular material provided at the bottom of a cyclone, bag filter, etc. is connected to the short pipe 10.
Alternatively, a screw feeder or other feeder may be connected as necessary. On the other hand, a packaging bag 17 is attached to the discharge port 8, but if necessary, it can be connected to a device for the next process via a screw feeder, rotary valve, etc. in place of the packaging bag 17. Further, a cylindrical ventilation member 4 is disposed in the housing 1 so that the supply port 7 and the discharge port 8 communicate with each other. It is divided into two air chambers. In other words, the ventilation member 4
The inside of the chamber is a volume reduction chamber 3, and dampers 5 and 6 connected to a pressure air source 12 such as a compressor and a vacuum pump and controlled by a timer 11 are arranged at the top and bottom of the chamber, respectively. On the other hand, the outer circumferential space of the ventilation member 4 serves as a deaeration chamber 2, and an exhaust port 9 is disposed on the housing 1 side, and the exhaust port 9 is connected to the suction side of the pressurized air source 12. Note that a blower may be used for intake, and the air cylinder 1 may be used as an operating member for the dampers 5 and 6.
3 and 14 are incorporated and connected to the air source 12, but the invention is not particularly limited to this, and an oil cylinder or an electric cylinder may be used instead of the air cylinder. 15 and 16 are solenoid valves; the solenoid valve 15 is attached to a pipe 20 connecting the exhaust port 9 and the suction side of the pressure air source 12;
6 is disposed in a pipe 26 that connects the pipe 20 and the pipe 18. These electromagnetic valves 15 and 16 are connected to the timer 11, and when the timer 11 is operated, the air flow in the pipe 20 is intermittently stopped or reversed, thereby cleaning the ventilation member 4. The structure is such that this is done. The volume reduction chamber 3 surrounded by the ventilation member 4 shown in FIG. This makes it easier to release the volume-reduced lump of raw material from the mold. In this way, this embodiment uses the cylindrical ventilation member 4 disposed in the housing 1 having the upper supply port 7 and the lower discharge port 8 so that the supply port 7 and the discharge port 8 communicate with each other. The interior surrounded by the member 4 is defined as a volume reduction chamber 3, the outer peripheral part is divided as a deaeration chamber 2, dampers 5 and 6 are provided at the top and bottom of the volume reduction chamber 3, and an exhaust port 9 is provided on the deaeration chamber 2 side. These are connected to the discharge side and the suction side of the pressurized air source 12, and these are operated and controlled by the timer 11, which controls the supply of raw materials, deaeration, discharge, and the ventilation member 4 after discharge. This is a device that reduces the volume of raw materials through a consistent process that includes back pressure washing to remove blockages. FIG. 2 is an explanatory diagram showing these steps, where a represents supply, b degassing, c discharge, and d cleaning, where a represents both dampers 5 and 6 at the upper and lower parts of the volume reduction chamber 3. From the closed state, only the upper damper 5 opens and the raw material P is fed into the volume reduction chamber 3. Next, in b, the upper damper 5 is closed again and the volume is reduced by the intake air that starts at the same time. The air in the container chamber 3 is suctioned and degassed, but at this time, the air present in the raw material P is also exhausted, so that the volume of the raw material P is reduced.
Note that the timing of this intake may be in the state shown in Figure a, that is, it may be performed at the same time as the supply. Next, c is a state in which only the lower damper 6 is opened and the raw material P is dropped and discharged after a predetermined amount of degassing has been performed, and at this time the intake of air is stopped. Then, in d, compressed air is sent instead of the above-mentioned suction to facilitate release of the volume-reduced mass of the raw material and to clean the ventilation member 4 to eliminate clogging. Also, at this time, the upper damper 5 is closed and the lower damper 6 is open.
After the volume-reduced mass of raw material is discharged, the lower damper 6 is closed and the upper damper 5 is opened to return to the supply state of a, and the above-mentioned steps are sequentially repeated. Further, as another embodiment, a plurality of housings 1 may be arranged in parallel, or housings 1a, 1b, 1c, and 1d may be assembled as shown in FIGS. 3 and 4, and the dampers 5 and 6 may be replaced with It is also possible to arrange two common rotary partition boards 21 and 22, and the respective housings 1a, 1b,
By sequentially rotating and moving the partition plates 21 and 22 to positions 1c and 1d (positions 1a, 1b, 1c, and 1d indicate the states of supply, deaeration, discharge cleaning, and completion, respectively). The raw material can be subjected to continuous volume reduction treatment. Note that the partition boards 21, 22 and the housings 1a, 1b, 1c, 1d are fixed on the partition boards 21, 22 side, and the housings 1a, 1b, 1
It may be formed by rotating c and 1d,
Furthermore, the surfaces of the partition boards 21 and 22 are covered with a breathable material 23, and the partition boards 21 and 22 are covered with breathable material 23.
It is also possible to form a gas passage 24 communicating with the pressurized air source 12 inside the pressure air source 22, and to also degas from the partition panels 21 and 22.

In this way, the present invention allows extremely efficient volume reduction of powder and granular material by circulating and continuously performing each process of supply, deaeration, discharge, and washing, and the degree of volume reduction can also be adjusted by exhaust gas. In addition to adjusting the pressure, dampers 5 and 6 and a solenoid valve 1 by a timer 11
By adjusting the opening of 5 and 16, it is possible to easily reduce the volume according to the properties of the powder or granular material. Moreover, since the structure is simple, it is advantageous in terms of maintenance of the device itself, and it is also easy to connect to other devices, so the effects of the present invention are remarkable.

[Brief explanation of drawings]

Fig. 1 is a sectional view of essential parts showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of the operation of this embodiment, Fig. 3 is another embodiment, and Fig. 4 is a sectional view taken along the line A-A' in Fig. 3. FIG. 5 shows another embodiment of the partition panels 21, 22. In the figure, 1...housing, 2...deaeration chamber, 3...volume reduction chamber, 4...ventilation member, 5...damper, 6...damper, 7...supply port, 8...discharge port, 9...Exhaust port, 11...Timer, 12...
...is a source of pressurized air.

Claims (1)

[Scope of Claims] 1. A cylindrical ventilation member 4 that shares the supply port 7 and the discharge port 8 is provided in the housing 1 having an upper supply port 7 and a lower discharge port 8. Dampers 5 and 6 are provided at the outlet 8 to create a sealed structure inside the housing 1 and the ventilation member 4, and an exhaust port 9 provided on the outer periphery of the housing 1 is connected to the suction side of the pressure air source 12 through a pipe 20, and the pressure A pipe 26 is provided to connect the discharge pipe 18 of the air source 12 and the pipe 20, and valves 15, 1 are provided on these pipes 20, 26.
6 and dampers 5 and 6 are connected to a timer 11. 2. The granular material volume reduction device according to claim 1, wherein the ventilation member 4 has an inner wall surface 25 that expands downward.