JPS592540B2 - Cyclone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cyclone that separates conveyed objects such as powder or granular materials from air during pneumatic transportation.

In general, in pneumatic transportation, as shown in Figure 1, the material and air transported through suction pipe a are separated by centrifugal force in cyclone b, with the powder moving downward and the air moving upward through exhaust pipe C. However, when the separation is not complete, the powder and granules may be released upward through the exhaust pipe C along with the air, so the upper part of the exhaust pipe C was covered with a filter d such as a wire mesh. .

However, there are restrictions on the diameter of the exhaust pipe due to separation efficiency, etc., and since the exhaust pipe itself is often cylindrical, the filtration area of the filter is also limited, and in order to further improve the separation efficiency, a fine filter is used. The pressure loss was large and it was difficult to use.

The present invention solves the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings. In FIG. 2, reference numeral 1 denotes a cyclone main body, and a suction pipe 2 is connected to the upper part of the circumferential surface.

Reference numeral 3 denotes an exhaust pipe, which has an inverted conical shape inclined downward from the center on the upper surface of the cyclone main body 1, and is formed such that its angle of inclination is greater than the angle of repose of the conveyed object.

Reference numeral 4 denotes an inlet portion of the exhaust pipe 3, which is formed to have a necessary diameter for the main body 1 in order to maintain separation performance similar to that of a conventional cyclone.

A filter 5 is provided to cover the large diameter portion 6 at the upper end of the exhaust pipe 3, and is formed in a cylindrical shape with an open lower end.

Reference numeral 7 denotes a cover of the filter 5, and an air discharge pipe 8 is connected to the circumferential surface of the cover.

Next, to explain the operation of the present invention, the conveyed objects and air that have been conveyed into the main body of the cyclone 1 from the intake pipe 2 are separated by centrifugal force, so that the objects to be carried go below the main body of the cyclone 1, and the air goes above the exhaust pipe 3. Even if incompletely separated conveyed materials are discharged upward through the exhaust pipe 3, they are completely separated by the filter 5.

Further, when the conveyance and separation work of the conveyed object and the air is completed, the conveyed object remaining in the exhaust stack 3 falls below the cyclone main body along the inclined surface of the exhaust tube.

As described above, according to the present invention, the conical exhaust pipe integrated with the cyclone body and the cylindrical filter have a simple shape and structure, and the inlet of the exhaust pipe can be maintained within the necessary diameter limit, while the filter The filtration area can be increased,
In other words, filtration efficiency can be improved without deteriorating separation performance, and pressure loss does not increase even if a fine filter is used.

In addition, even if incompletely separated conveyed objects and air are discharged upward into the exhaust stack, they will eventually fall along the slope of the exhaust stack, so the next time transport work is started, the upper part of the exhaust stack will be clean. It is in a state.

Furthermore, compared to conventional exhaust pipes that have a cylindrical shape with a required diameter, the space that the exhaust pipe closes in the upper center of the cyclone is larger, so the objects transported from the suction pipe are pushed to the outer circumference of the cyclone. Since sufficient centrifugal force is applied, the separation efficiency is also improved here.

FIG. 3 shows another embodiment of the exhaust pipe, in which the lower inlet of the conical exhaust pipe 3 having an angle of inclination greater than the angle of repose is extended downward, and a small cylindrical portion 4' is added. , the operation and effect are similar to those of the previous embodiment.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an air transport route using a conventional cyclone, FIG. 2 is a longitudinal sectional view of an embodiment of the present invention, and FIG. 3 is a longitudinal sectional view of another embodiment of the invention. 1 is a cyclone body, 3 is an exhaust pipe, and 5 is a filter.

Claims (1)

[Claims] 1. A cyclone in which an inverted conical exhaust pipe having an inclination angle greater than the angle of repose of the conveyed object is formed on the upper surface of the main body, and a large diameter portion at the upper end of the exhaust pipe is covered with a cylindrical filter.