JPH0635235U - Device to prevent natural outflow of powder in circle feeder - Google Patents

Abstract

(57) [Abstract] [Purpose] This is a so-called circle feeder consisting of inner and outer cylinders 1 and 5, and a granular material having a large flushing property is discharged from the discharge port 2.
It is intended to prevent uncontrolled outflow from nature. [Structure] The powder / granule storage inner cylinder 1 is concentrically supported on the bottom plate 4 of the bottomed outer cylinder 5 via a gap t, and the angle of repose α is formed from the gap t so that the powder / grain particles are provided in the inner / outer inter-cylinder passage 6. The body b is discharged, a central rotary blade 8 is provided on a rotary shaft 7 projecting from the center of the bottom plate 4, and a rotary ring 9 provided along the outer cylinder 5 is connected to the tip of the rotary blade 8 and In the circle feeder in which the ring 9 is provided with a plurality of outer peripheral rotary vanes 10 facing the central portion of the bottom plate, and the particulate discharge port 2 is opened in the passage 6, in the inner surface of the inner cylinder 1 to the discharge port 2. Of the outflow prevention plate 3, and the upper edge 3'of the prevention plate 3 contacts the inner surface of the inner cylinder 1,
A gap T is interposed between the lower edge 3 ″ and the bottom plate 4, and the prevention plate 3 is inclined inward.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This plan is concerned with a device for preventing the powder from spontaneously flowing out from the inner cylinder of a circle feeder.

[0002]

[Prior art]

 In the conventional circle feeder, the lower end of the natural outflow prevention plate is provided close to the discharge port that opens in the inner-outer tube passage (Fig. 3). It was difficult to prevent the uncontrolled outflow of water.

[0003]

[Problems to be solved by the device]

 The purpose of this plan is to prevent uncontrollable spontaneous outflow from the outlet of the granular material with a large flushing property (small repose angle) supplied to the inner cylinder.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present proposal concentrically supports the powder storage inner cylinder through a gap on the bottom plate of the bottomed outer cylinder, forms a repose angle from the gap, and loads the powder into the inner-outer cylinder passage. A central rotary vane is provided on the rotary shaft protruding from the center of the bottom plate, the rotary ring provided along the outer cylinder is connected to the tip of the rotary vane, and the ring faces the center of the bottom plate. In a circle feeder having a plurality of outer peripheral rotary blades and a powder discharge port opening in the passage, an outflow prevention plate to the discharge port is provided on the inner surface of the inner cylinder, and the upper edge of the prevention plate is It is constituted by a powder spontaneous outflow prevention device in a circle feeder that is in contact with the inner surface of the inner cylinder, has a gap between the lower edge and the bottom plate, and has the prevention plate inclined inward.

[0005]

According to the present invention, when the granular material b having a large flushing property is supplied to the inner cylinder 1, it flows out from the gap t between the lower edge of the inner cylinder 1 and the bottom plate 4 into the inner-outer cylinder passage 6 to form the angle of repose α. The outflow stops. Since the lower edge 3 ″ of the outflow prevention plate 3 is provided inside the lower edge of the inner cylinder 1 on the inner cylinder 1 side of the discharge port 2 in the passage 6, The granules b flowing out from the gap T between the bottom plate 4 and the bottom plate 4 form a repose angle α between the lower edge 3 ″ of the prevention plate 3 and the inner edge of the discharge port 2 and the flow stops.

In this state, the granular material b flowing out into the passage 6 and forming the angle of repose α and stopping can be carried by the outer peripheral rotary blade 10 and dropped and supplied downward from the discharge port 2. Even in that case, the granular material b descending in the inner cylinder 1 should descend from the upper edge 3 ′ of the prevention plate 3 to the inside of the prevention plate 3 and enter the space between the prevention plate 3 and the inner cylinder 1. The powdery particles b moving through the passage 6 form the angle of repose α from the lower edge 3 ″ of the prevention plate 3 and carry the powdery particles b held in the discharge port 2 to cause flushing. There is no.

[0007]

【Example】

 A bottomed outer cylinder 5 having a bottom plate 4 is provided on the machine frame, and the granular material storage inner cylinder 1 is concentrically supported on the bottom plate 4 through an outflow gap t in the vertical direction, and the granular material flowing out from the gap t. The angle of repose α is formed on the bottom plate 4 of the inner-outer cylinder passage 6 and held.

A spoke-shaped central rotary vane 8 is provided on a rotary shaft 7 projecting from the center of the bottom plate 4, and a rotary ring that is close to (along) the inner peripheral surface of the outer cylinder 5 at the tip of the vane 8. 9 is connected to the ring 9, and a plurality of claw-shaped outer peripheral rotary blades 10 facing the central portion of the bottom plate 4 are provided, so that the granules b of the passage 6 are connected to the discharge port 2 opened in the passage 6. It carries and supplies a fixed amount from the discharge outlet 2 to the process below, whereby a circle feeder is formed.

An outflow prevention plate 3 is provided on the inner surface of the inner cylinder 1 inside the discharge port 2, and an upper edge 3 ′ thereof is adhered to the inner surface of the inner cylinder 1 by welding or the like to form a lower edge 3 ″ thereof. An outflow gap T is interposed between the bottom plate 4 and the prevention plate 3 and is inclined downward toward the inside. The angle of repose α is formed during the period and the outflow is stopped.

Reference numeral 11 in the drawing is a horizontal disk connecting the inner and outer cylinders 1 and 5, 12 is a speed reducer of the rotating shaft 7, 13 is a speed change motor, 14 is a transmission belt, and 15 in FIGS. 4 and 5 is This is a baffle plate that prevents the powder b'having poor fluidity from rotating together with the central rotary blade 8 (fast rotation).

[0011]

[Effect of device]

 Since the present invention is configured as described above, in the so-called circle feeder, the granular material b having a large flashing property is introduced into the discharge port 2 opened in the inner-outer inter-cylinder passage 6 beyond the natural holding state due to the angle of repose α. There is a benefit that the flushing phenomenon that directly flows in from the cylinder 1 can be suppressed.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a device for preventing spontaneous outflow of powder in a circle feeder of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a vertical cross-sectional view of a conventional circle feeder.

FIG. 4 is a vertical cross-sectional view of a co-rotation preventing device for powder having poor fluidity.

FIG. 5 is a plan view of FIG.

[Explanation of symbols]

 1 powder storage inner cylinder 2 powder discharge port 3 outflow prevention plate 3'upper edge 3 "lower edge 4 bottom plate T gap

Claims (1)

[Scope of utility model registration request] 1. A powder storage inner cylinder is concentrically supported on a bottom plate of a bottomed outer cylinder via a gap, a repose angle is formed from the gap, and the powder is discharged to a passage between the inner and outer cylinders. A central rotary vane is provided on a rotary shaft protruding in the center, and a rotary ring provided along the outer cylinder is connected to the tip of the rotary vane, and a plurality of outer rotary vanes facing the central part of the bottom plate are connected to the ring. In a circle feeder having a powder discharge port opened in the passage, an outflow prevention plate to the discharge port is provided on the inner surface of the inner cylinder, and the upper edge of the prevention plate is in contact with the inner surface of the inner cylinder. A powder outflow prevention device in a circle feeder in which a gap is provided between a lower edge and a bottom plate and the prevention plate is inclined inward.