JPH0585435U - Scraper for powder quantitative feeder - Google Patents

Abstract

(57) [Summary] [Purpose] In a powder quantitative supply device in which the powder in the annular groove of a rotary table that is rotated in one direction at a constant speed is scraped out of the rotary table by a scraper, Improve quantitativeness. [Arrangement] Arc-shaped paper making surface 1 for making powder into a scraper 17 for scraping powder in an annular groove 7 of a rotary table 3.
8 is formed. A guide wall 19 is formed on one side of the paper making surface 18 on the table center side. An arc-shaped guide surface 20 is formed on the upper part of the inner surface of the guide wall 19 for guiding the powder produced by the paper making surface 18 in the outer diameter direction of the rotary table 3, and the powder scraped by the scraper 17 is removed. The rotary table 3 is made to flow smoothly in the outer diameter direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a scraper incorporated in a powder quantitative supply device.

[0002]

[Prior Art]

 When finely pulverizing powder, or performing precision classification or mixing, the quality of the powder supplied to the crusher or classifier, etc. greatly affects the accuracy of pulverization, classification, mixing, etc. Therefore, it is necessary to continuously supply the feed powder in a constant amount in a constant amount.

As a powder quantitative supply device, a device described in Japanese Patent Publication No. 2-52534 has been conventionally known. This fixed quantity feeding device is provided with a rotary table having an annular groove on the upper surface at the lower end of a casing connected to the lower part of the hopper, and the rotary shaft center of this rotary table is eccentric with respect to the axial center of the casing so that one of the annular grooves is Part of the casing from the outside of the casing to the outside, rotate the rotary table in one direction at a constant speed, and scrape the powder falling from the hopper and the casing into the annular groove with a scraper provided outside the casing. The discharge chute is then discharged.

[0004]

[Problems to be solved by the device]

 By the way, the scraper incorporated in the above-mentioned powder quantitative feeding device raises the powder in the annular groove to form a swelling on the powder, and due to the collapse of the swelled powder, the scraper enters the discharge chute. Since it is discharged, the powder may agglomerate and fall depending on the properties of the powder, and it may not be possible to continuously supply the powder in a fixed amount.

The present invention has a technical object to improve the quantitativeness of the supplied powder by allowing the powder in the annular groove to smoothly flow into the discharge chute.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, an arc-shaped paper making surface for making powder is formed on the scraper for scraping powder in the annular groove of the rotary table, and the table center of this making surface is formed. A guide wall is formed on one side of the guide wall, and an arcuate guide surface is formed on the upper part of the inner surface of the guide wall to guide the powder powdered by the above-mentioned paper grain surface in the outer radial direction of the rotary table. It was adopted.

[0007]

[Action]

 As described above, the present invention guides the powder, which has been drawn up by the paper making surface, in the arcuate inner surface of the guide wall in the outer radial direction of the rotary table, and therefore the powder scraped by the scraper. The body can be made to flow smoothly in the outer diameter direction of the rotary table.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in the figure, a cylindrical casing 2 is connected to the lower end of the hopper 1, and a rotary table 3 is provided at the lower end of the casing 2.

The rotary table 3 is rotatably supported by a support shaft 5 of a table case 4 provided below the rotary table 3 via a bearing 6.

Here, the axis of the rotary table 3 and the axis of the outer diameter surface of the support shaft 5 are coaxial with each other, and these axes are eccentric to the axis of the casing 2 by a distance x. .

An annular groove 7 is provided on the upper surface of the rotary table 3. The annular groove 7 has a center on the axis of the rotary table 3 and a part thereof is located outside the outer periphery of the casing 2.

A motor 8 is attached to the lower surface of the table case 4, and a main shaft 9 driven by the motor 8 is inserted into a shaft insertion hole 10 formed in the support shaft 5 so that the main shaft 9 is inserted into the casing 2. Is located.

The main shaft 9 is provided coaxially with the casing 2, and the rotation of the main shaft 9 is transmitted to the rotary table 3 via the Oldham joint 11.

A pair of stirring blades 12 and 13 are vertically provided on the main shaft 9, and the upper stirring blade 12 rotates in the hopper 1 to stir the powder in the hopper 1. On the other hand, the lower stirring blade 13 rotates in the casing 2 to stir the powder in the casing 2.

A scraper shaft 14 extending in the outer diameter direction of the casing 2 is provided outside the casing 2, and a cover 15 that rotatably supports the scraper shaft 14 is attached to the table case 4.

A scraper 17 for scraping out the powder in the annular groove 7 into the discharge chute 16 is attached to the tip of the scraper shaft 14 located on the casing 2 side.

3 to 5 show details of the scraper 17. As shown in the figure, the scraper 17 is provided with an arc-shaped paper making surface 18, and a guide wall 19 is formed on one side of the paper making surface 18 on the table center side. An arc-shaped guide surface 20 is provided on the upper part of the inner surface of the guide wall 19 to guide the powder, which has been made by the paper making surface 18, in the outer diameter direction of the rotary table 3.

The scraper 17 is tilted about the scraper shaft 14 by rotating the worm 21 incorporated in the cover 15, and the insertion depth of the tip end portion into the annular groove 7 is adjusted.

Now, when the rotary table 3 is rotated by driving the motor 8, the powder dropped from the hopper 1 and the casing 2 into the annular groove 7 is scraped out by the scraper 17. At this time, the powder moves upward along the paper making surface 18 of the scraper 17 and is guided along the guide surface 20 in the outer diameter direction of the rotary table 3. Therefore, the powder scraped out by the scraper 17 smoothly flows in the outer diameter direction of the rotary table 3 and is continuously supplied in a fixed amount into the discharge chute 16.

[0021]

[Effect of the device]

 As described above, in the scraper according to the present invention, the powder in the annular groove formed by the forming surface is moved in the outer diameter direction of the rotary table by the arc-shaped guide surface provided on the upper inner surface of the guide wall. Since it is guided, the flow of the powder scraped out by the scraper is smooth, and the powder can be continuously supplied in a fixed amount regardless of the property of the powder.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a powder quantitative supply device using a scraper according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a perspective view of the same scraper.

[Explanation of symbols]

 2 Casing 3 Rotary table 7 Annular groove 17 Scraper 18 Paper making surface 19 Guide wall 20 Guide surface

Claims (1)

[Scope of utility model registration request] 1. A rotary table which closes a lower end opening of a cylindrical casing is eccentric with respect to an axis of the casing, and has a center on the upper surface of the rotary table on the rotary axis of the rotary table. A device for quantitatively supplying powder, in which an annular groove partially facing the outside of the casing is provided, the rotary table is rotated, and the powder falling from the inside of the casing into the annular groove is scraped out by a scraper provided outside the casing. In the above, the scraper is formed with an arc-shaped paper making surface for making powder in the annular groove, a guide wall is provided on one side of the table center side of the paper making surface, and the guide wall is provided above the inner surface of the guide wall. A scraper for a powder quantitative supply device, characterized in that an arcuate guide surface is formed for guiding the powder extracted by the paper-making surface in the outer diameter direction of the rotary table.