JPS6127863Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for transporting powdery materials such as foods, medicines, cosmetics, etc.

Powdered raw materials for foods, pharmaceuticals, cosmetics, etc. are legally required or voluntarily treated with gas fumigation for epidemic prevention and sterilization purposes. Therefore, the present invention was developed with the aim of providing a device that can effectively perform gas fumigation and transport powder and granular materials after fumigation using a commonly used pressure tank type pneumatic transportation device. It is something that

Hereinafter, the present invention will be described in detail based on specific embodiments shown in the accompanying drawings.

In FIG. 1, a temporary storage tank 3 is installed above a pressure tank 1 via a receiving valve 2 to accommodate powder and granular material. Vacuum pump 4 includes filter 5 and vacuum valve 6
It is connected to the pressure tank 1 via a vacuum pipe 7, and the vacuum pump 4 is connected to a neutralization device 8 for detoxifying fumigation gas. By driving the vacuum pump 4, the inside of the pressure tank 1 is brought into a vacuum state, and the vacuum valve 6 is closed by a preset vacuum pressure of a vacuum switch 9 provided in the pressure tank 1. A transport gas source 10 is connected to the lowest part of the pressure tank 1 by a delivery gas line 13 via a sterile filter 11 and a transport gas valve 12 . At the lower part of the pressure tank 1, there is provided an air diffuser plate 14 with a large number of ventilation holes having a diameter smaller than that of the particles of powder and granular material to be handled.
The intake port 16 is positioned above the air diffuser plate 14, and is vertically provided in the pressure tank 1, with the upper part bent to protrude from the side wall of the pressure tank 1, and the transport valve 17 is interposed therebetween. A fumigation gas source 18 such as methyl bromide CH ₃ Br is connected to a fumigation pipe 20 via a fumigation gas valve 19 .
It is connected to the transport gas piping 13 by. A pressure switch 21 is provided at the upper part of the pressure tank 1 to detect the pressure inside the pressure tank 1.

The operation of this device will be explained. First, the receiving valve 2 is opened to receive a predetermined amount of unprocessed powder P stored in the temporary storage tank 3 into the pressure tank 1. Next, the intake valve 2, the fumigation gas valve 1
9. Close the transport gas valve 12 and the transport valve 17, open the vacuum valve 6, and drive the vacuum pump 4 to supply the pressure tank 1 through the filter 5, vacuum valve 6, and vacuum piping 7.
The air inside is extracted to create a vacuum state, and when the pressure in the pressure tank 1 reaches the pressure set by the vacuum switch 9, the vacuum switch 9 detects this and closes the vacuum valve 6. next,
The fumigation gas source 18 is driven and the fumigation gas valve 19 is opened, and the fumigation gas passes through the fumigation gas valve 19, the fumigation pipe 20, and the transport gas pipe 13, reaches the lowest part of the pressure tank 1, passes through the diffuser plate 14, and enters the pressure tank. 1 and the powder P in the pressure tank 1
At the same time, the powder P is vigorously stirred and air is displaced into the minute spaces between the particles of the powder P to infiltrate at a high concentration to sterilize and kill insects. Pressure switch 21 for fumigation gas
is pressurized to a preset pressure, the fumigation valve 19 is closed, and the sample remains in the pressure tank 1 for a preset time necessary for the fumigation effect. When the fumigation time is over,
The vacuum valve 6 is opened, and the fumigation gas is detoxified through the vacuum piping 7, the vacuum valve 6, the filter 5, the powder P, and then introduced into the neutralization device 8, where it is released outside the system as a safe exhaust gas. . When the inside of the system reaches approximately atmospheric pressure, the vacuum pump 4 is driven again to exhaust fumigation gas remaining in the powder P in the pressure tank 1, and the pressure in the pressure tank 1 becomes the vacuum set by the vacuum switch 9. Once the pressure is reached, the vacuum valve 6 is closed and a command to transport the powder P from another system is awaited. When a transport command is received, the transport gas source 10 is driven and the transport gas valve 12 is opened, and the transport gas is purified through the sterilization filter 11, passed through the transport gas valve 12 and the transport gas piping 13, and is then sent to the top of the pressure tank 1. It reaches the lower part, flows into the pressure tank 1 through the air diffuser plate 14, stirs the powder P, and increases the pressure. When the transport gas reaches the set pressure of the pressure switch 21, the transport valve 17 is opened, and the powder P becomes a solid-gas mixed flow with the transport gas, flows into the transport pipe 15 from the intake port 16, passes through the transport valve 17, and is transported to the destination. will be pumped to. After detecting that the powder P in the pressure tank 1 is gone is detected by the lower limit pressure of the pressure switch 21 or by a lower limit powder meter or weight measuring device (not shown), the transport valve 17 and the transport gas valve 12 are closed. Stop driving the transport gas source 10. In this way, one cycle of driving of this device is stopped.

Figures 2 and 3 are the second and third diagrams of the present invention.
In this embodiment, parts having the same functions as those of the first embodiment shown in FIG. 1 are denoted by the same reference numerals. The filter 5, a vacuum compression device 22 that has the functions of a vacuum pump serving as a drive source, and a gas compression device serving as a transport gas source, and a sterilization filter 11 are connected to valves 23, 24, 2.
Filters 5 and 26 are connected in series with filters 5 and 26 interposed in between.
is connected to the upper part of the pressure tank 1 and the sterilization filter 11 is connected to the bottom part, the fumigation gas source 18 is connected to the valve 23, the neutralization device 8 is connected to the valve 25, and in the third embodiment, temporary storage in the pressure tank 1 is performed. A pressure tank 1 and a temporary storage tank 3 are installed to be separated from each other by vacuum transporting the powder P from the tank 3.

During vacuum operation and fumigation gas exhaust, pressure tank 1 to filter 5, vacuum compression device 2
2. Operate the valve so that it flows in the direction of the neutralization device 8, and during fumigation operation, from the fumigation gas source 18 to the vacuum compression device 22, sterilization filter 11, and pressure tank 1, and from the atmosphere to the vacuum during transportation operation. The valves are operated to flow in the directions of the compression dual-purpose device 22, the sterilization filter 11, the pressure tank 1, and the transport pipe 15, respectively. Further, in the third embodiment, the valve is operated so that the powder P stored in the temporary storage tank 3 is supplied to the pressure tank 1 by vacuum operation.

As described above, the present invention connects a temporary storage tank containing powder and granules, a vacuum pump, a fumigation gas source, a transport gas source, and a transport pipe to a pressure tank through valves, and the pressure tank Each valve is opened and closed to receive a predetermined amount of powder and granules, the air between the granules is removed to create a vacuum state, fumigation gas is introduced to replace the air, and the powder is stirred to remove the fumigation gas. This is a powder transport device configured to discharge powder and transport gas and forcefully transport the powder through the transport pipe. It is possible to transport powdered materials after fumigation treatment.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the invention, FIG. 2 is a diagram showing a second embodiment of the invention, and FIG. 3 is a diagram showing a third embodiment of the invention. 1... Pressure tank, P... Powder, 3... Temporary storage tank, 4... Vacuum pump, 22... Vacuum compression dual use device, 18... Fumigation gas source, 10... Transportation gas source, 15... ...transport pipe, 2, 6, 19, 12,
17, 23, 24, 25, 26... valve.

Claims (1)

[Scope of utility model registration request] A temporary storage tank containing powder and granular material, a vacuum pump, a fumigation gas source, a transport gas source, and a transport pipe are connected to the pressure tank through valves, and each valve is opened and closed with respect to the pressure tank, Accepts a predetermined amount of powder and granules, extracts the air between the powder particles to create a vacuum state, introduces fumigation gas to replace the air, stirs the powder, discharges the fumigation gas, and allows transport gas to flow in. A powder and granule transport device characterized by being configured to forcefully transport powder and granules through a transport pipe.