JPS6327774Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a mixing and pumping device that can mix powder and granular materials with high precision and pump this uniform mixture efficiently.

Japanese Utility Model Application No. 53-150969 has been proposed as a mixing device for powder and granular materials, but this device not only mixes at normal pressure, but can only discharge at low pressure, and requires a large amount of air supply, so it is difficult to use power. It is expensive and uneconomical.

Furthermore, segregation tends to occur within the tank during discharge. In addition, Utility Model Publication No. 48-45153 is known as a mixing pressure feeding device, but this device has a complicated structure, and as the tank capacity increases, the mixing accuracy deteriorates and the amount of air increases.In addition, it has the disadvantage that segregation is likely to occur during pressure feeding. .

The present invention provides a mixing and pumping device that is capable of high-precision mixing and at the same time prevents segregation within the tank during pumping.

This device has an ascending mixing pipe vertically installed above the central discharge port of the tank, which has an aperture opening and a side window at the top and a guide cone fixed to the outer periphery of the bottom end. It is composed of functional feeders connected together.

To explain the embodiment of the present invention with reference to the figures, 1
is a pressurized tank, 2 is an input valve, 3 is an exhaust valve, 4 is an outlet, 5 is a funnel-shaped aerator provided at the bottom of the tank 1a, 5a is an aerator chamber, and 6 is a regulator for controlling the pressurized air leading to this. It is a valve that does.

Reference numeral 7 designates a rising mixing pipe vertically installed in the center of the tank, located at the center of the opening of the discharge port, and has an aperture opening 8 and a tapered part 9 at the upper end, and a window 10 in the pipe wall directly below it.
is provided. The window 10 is provided near the powder level 11.

A conical guide cone 12 is provided on the outer periphery of the lower end of the rising pipe.
is permanently installed. 12a is a bottom guide surface.

7a is a mounting arm of the riser pipe.

A pressurized gas feeder 13 is connected to the lower end of the outlet 4, and the feeder includes a guide tube 14 and a lower end 14 thereof.
It is constituted by an inner tube 15 which is concentrically disposed with an inner circumference 17 in between, and an outer tube 16 that commonly surrounds the inner tube 15.

A swirling airflow supply pipe 18 is connected to the outer cylinder 16, and a pressure feeding pipe 20 is connected to the inner pipe 15.

19 is a control valve, 19a is a check valve, and 21 is a discharge valve.

22 is a common source of pressurized air.

In the above-mentioned apparatus, the valves 2 and 3 are left open when introducing the powder or granular material (two or more types).

During mixing, input valve 2 and discharge valve 21 are closed, and valves 3, 6, and 19 are opened.

The granular material is fluidized by the aerator 5, and pressurized gas is blown up from the discharge port 4 via the pressurized gas feeder 13 and rises in the riser pipe 7.

Therefore, the granular material is transferred to the bottom guide surface 12 of the guide cone.
a (approximately parallel to the aerator surface) at the lower end of the riser and is discharged from the window 10 and upper end opening 8 of the riser along with the airflow.

Here, different types of powder and granules are mixed based on the difference in the powder and granule paths and the time difference, and as they are repeatedly circulated in the tank, they are uniformly mixed.

After the mixing is completed, valves 3, 6, and 19 are temporarily closed, and then valve 6 is opened to increase the pressure in tank 1 to a predetermined pressure (for example, 2 kg/cm ² ).

The mixed powder in the tank is fluidized again by this pressurization.

When the valves 19 and 21 are then opened, pressurized gas from the feeder 13 flows into the inner tube 15 through the gap 17, whereby the mixed powder is pumped into the pumping tube 20.

During pumping, the pressurized gas in the tank acts as a pumping booster gas.

In the device of the present invention, by making the cross-sectional area of the discharge port and the cross-sectional area of the riser substantially equal, it is possible to reduce the amount of blown air dissipated outside the pipe.

Furthermore, since the flared portion of the guide cone and the guide surface 12a are provided, highly accurate mixing is possible and segregation during pressure feeding can be prevented.

In addition, since the pressurized feeder is used for both mixing and pressure feeding, the equipment can be made compact without waste, and the fluidizing gas and feeding gas can also be supplied from the same line, simplifying the equipment.

In the present invention, the function of pumping the granular material is performed by the pressure difference between the internal pressure of the tank and the pressure applied to the feeder, and therefore can be controlled by the valve 19.

[Brief explanation of the drawing]

The figure is a sectional view of essential parts of the proposed device. 5...Aerator, 7...Rising pipe for mixing, 8...
...Aperture aperture, 10...Window, 12...Guide cone,
13...Feeder.

Claims (1)

[Scope of utility model registration request] A mixing and pumping device for powder and granular materials comprising a funnel-shaped aerator at the bottom of a pressurizable tank and a discharge port at its center, which has an aperture opening and a window at the upper end,
A rising mixing pipe having a conical guide cone fixed to the outer periphery of its lower end is vertically supported above the center of the discharge port, and at the discharge port there is a space between the guide pipe and the inner periphery of its lower end.
The guide pipe of the feeder is connected to an outer cylinder that commonly surrounds an inner pipe disposed through the inner pipe, and the outer cylinder receives pressurized gas from the pressurized air source for the aerator. A mixing and pumping device for powder and granular materials, wherein a pumping pipe is connected to the inner pipe.