JPS63278546A - Method for scraping back residual powder in powder fixed delivery feeder - Google Patents

Abstract

PURPOSE:To prevent the remaining of residual powder in a feeder as a defective product by scraping back the residual powder deposited on the vertical wall surface of a feed disk by a scraping member arranged in an annular passage behind a discharge gate in a powder fixed delivery feeder. CONSTITUTION:The annular passage D is formed between a receiving disk and the feed disk rotating in the receiving disk in the powder fixed delivery feeder, and the powder is transferred toward a weight-discharge port 4 through the annular passage D by the rotation of the feed disk. The powder is continuously and quantitatively supplied from the weight-discharge port 4 by adjusting the opening of the discharge gate 5 arranged in the annular passage D. In addition to such a constitution, the scraping member 6 is arranged in the annular passage D behind the discharge gate 5, and the residual powder deposited on the vertical wall surface of the feed disk is scraped back to the annular passage D. By this method, the residual powder is not deposited on the vertical wall surface and aged, and the defective product does not remain in the feeder.

Description

[Detailed Description of the Invention] "Object of the Invention" (Industrial Application Field) The present invention relates to a method for scraping back weighed powder in an apparatus for continuously and quantitatively supplying powder material. .

(Prior art) There have been various types of devices that attempt to continuously supply a fixed amount of powder, etc., but it is extremely difficult to ensure a sufficient fixed amount of supply due to the unique properties of powder. .

The present inventor first proposed a powder pressure self-adjusting device that can self-adjust the powder pressure in order to improve the quantitative properties of supplied powder, etc., and published Japanese Patent Publication No. 52-1793. and Japanese Patent Publication No. 82-44578), and also proposed an automatic flow rate control device for powder, etc., which automatically controls the rotation system in which the supply amount is determined (Japanese Patent Publication No. 82-8371).
.

In these inventions, since the rotation speed of a rotating system that determines the supply amount, such as a supply plate, is the capacity itself, the capacity is changed by variably adjusting the rotation speed of the rotating system, and apparent specific gravity, etc. Correction including errors is performed by adjusting the opening of the discharge gate.

The above-mentioned powder continuous metering feeder can be used for rAFJ or one-rotation rotation by fixing the discharge gate and varying the rotation speed of the rotation system, depending on the purpose of use and the powder to be fed. Keep the number constant and adjust it by adjusting the opening of the discharge gate.

(Problem to be Solved by the Invention) However, when the above-mentioned powder continuous metering feeder is used to feed a powder agent to be added to adjust the pH value of raw water or wastewater, for example, it is necessary to feed powder according to the amount of water. The input amount is variably adjusted by the rotation speed of the supply board, and the opening of the discharge gate is automatically adjusted according to the pH value of the raw water or wastewater, so the powder to be supplied can be controlled by changing the rotation speed of the rotation system and the discharge gate. This is done by both the opening adjustment parts. At this time, the discharge gate operates within the maximum discharge area, so the residual powder remains in the annular passage and rotates inside the machine, but the residual powder attached to the vertical wall of the supply board does not collapse and the vertical wall It may stick to the surface and form a wall. This residual powder remains and becomes old, resulting in defective products remaining in the machine.

The object of the present invention is to overcome the above-mentioned difficulties.

It is an object of the present invention to provide a method for measuring and sorting residual powder in a powder metering feeder, which can accurately scrape the residual powder that may adhere to the vertical wall surface of a supply plate back toward the annular passage side.

"Structure of the Invention" (Means for Solving the Problems) As shown in the drawings, the method for measuring and sorting the residual powder in the powder quantitative feeder according to the present invention is as follows. An annular passage is formed between the rotating supply plate 2 and the supply II
! 2, the powder is transferred to the measuring and discharging port 4 side through the annular passage, and the discharge gate 5 disposed in the annular passage
In the powder quantitative feeder configured to continuously supply a fixed amount of powder from the metering discharge port 4 with an opening degree of 3j1 m, the scraping member 6 disposed in the annular passage at a position behind the discharge gate 5 supplies the powder in a constant quantity. It is characterized by scraping the remaining powder adhering to the vertical wall surface 7 of g12 back into the annular passage.

(Function) The specific structure of the powder metering machine itself mentioned above is
This is described in Japanese Patent Application No. 1793, and has a configuration similar to that of the powder quantitative feeder according to the present invention, in which the powder is delivered to the metering and discharging port 4 side through an annular passage by the rotation of the supply plate 2. The powder that has been transferred and has reached the metering outlet side is continuously supplied in a constant quantity from the metering outlet 4 by the opening rA of the discharge gate 5 disposed in the annular passage.

Since the above-mentioned discharge gate 5 operates within the maximum discharge section, residual powder with a width corresponding to the gap between the vertical wall surface 7 of the supply plate 2 and the tip edge of the discharge gate 5 remains in the annular passage and rotates inside the machine. However, even if residual powder adheres to the vertical wall surface 7 of the supply 512 and does not collapse, the discharge gate 5
Since a scraping member 6 is disposed in the annular passage at the rear position of , the adhering residual powder is appropriately scraped off by the scraping member 6 and returned to the annular passage.

Therefore, even if residual powder adheres to the vertical wall surface 7, it is immediately scraped back, and no old and defective products remain in the machine.

(Example) An example of a method for measuring and sorting residual powder in a powder quantitative feeder according to the present invention will be described based on the drawings.

Figure 1 is a cross-sectional view of the powder quantitative feeder, Figure 2 is a cross-sectional view taken along the line x-X in Figure 1, Figure 3 is a cross-sectional view taken along the Y-Y line in Figure 2, and Figure 4 is a cross-sectional view taken along the line Y-Y in Figure 2. FIG. 5 is a cross-sectional view of main parts showing another arrangement form of the scraping member, and FIG.
The figure is a sectional view of a main part showing the arrangement of the scraping member when the scraping piece is provided on the supply board.

As mentioned above, the specific configuration of the powder quantitative feeder itself, which is the object of the present invention, is shown in Japanese Patent Publication No. 1793/1983, and includes a receiving fil and a supplying plate 2 rotating within the snow receiving 1. An annular passage is formed between the two, and the powder is transferred to the metered discharge port 4 side through the annular passage by the rotation of the supply plate 2, and is controlled by the opening adjustment part of the discharge gate 5 disposed in the annular passage. It is configured to continuously supply a fixed amount of powder from the metering outlet 4.

In addition, in the figure, 3 is a scraping piece placed on the outer edge of the upper surface of the supply 912, and some models do not have this scraping piece. Reference numeral 8 denotes a scraping blade arranged on the outer periphery of the bottom of the supply q12, and reference numeral 9 denotes a partition plate arranged so as to cover the soil portion of the metering and discharging port 4.

In the device used to carry out the weighing residue scraping method of the present invention, a scraping member 6 is disposed in the annular passage at a position behind the discharge gate 5, and a scraping member 6 is disposed in the annular passageway at a position behind the discharge gate 5. It is configured to scrape the remaining powder adhering to the annular passage back into the annular passage.

FIG. 3 shows the arrangement of the scraping member 6 when the above-described scraping piece 3 is not provided, and as shown in FIG. It is attached to the lower surface side of the partition plate 6. In the example shown in FIG. 5, the scraping member 6 is provided with a support portion 10 at the rear, and this support portion 10 is held between the outer peripheral upper surface of the snow catcher 1 and the partition plate 6, and is fixed with fixing screws 11. .

FIG. 6 shows an example in which a scraping piece 3 is disposed on the outer periphery of the upper surface of the supply plate 2. In this case, the rotation of the supply plate 2 causes the scraping piece 3 to be moved above the annular passage. Since the scraping member 6 passes through the scraping piece 3, the scraping member 6 must be placed at a position avoiding the scraping piece 3. Therefore, a part of the outer circumferential upper surface of the snow catcher 1 is cut out to form a supporting portion 10 of the scraping member 6. After fitting and pressing with the holding member I2, fix the fixing screw! !
It is fixed.

"Effects of the Invention" According to the method for measuring and sorting residual powder in a powder metering feeder according to the present invention, the powder is transferred to the metering and discharge port 4 side through the annular passage by the rotation of the supply plate 2, and is transferred to the discharge gate 5. Depending on the opening degree of the discharge gate 5, the metered residual powder remaining in the machine is continuously supplied from the metering discharge port 4 by adjusting the opening degree of the discharge gate 5.
Even if it adheres to the vertical wall surface 7 of 12 and does not collapse,
At a position behind the discharge gate 5, the adhering residual powder is appropriately scraped off by the scraping member 6 disposed in the annular passage, and returned to the annular passage, and the powder is metered and discharged together with the newly supplied powder. It can be transferred to 4 sides.

Therefore, the weighed residual powder will not adhere to the vertical wall surface 7 of the supply board 2, and no defective products will remain in the machine.

[Brief explanation of drawings]

The drawings show a device used to carry out the method for measuring residual powder in a powder quantitative feeder according to the present invention, and FIG. 1 is a cross-sectional view of the powder metering feeder, and FIG. 3 is a sectional view taken along the Y-Y line in FIG. 2, and 4th
The figure is a sectional view taken along the Z-Y line in FIG. 3, FIG. 5 is a sectional view of the main part showing another arrangement of the scraping member, and FIG. It is a sectional view of the principal part showing the arrangement form of the holding member.

Claims (1)

[Claims] Powder is transferred to the metering and discharging port 4 side through the annular passage D by rotation of the supply plate 2, and is transferred from the metering and discharging port 4 by adjusting the opening degree of the discharge gate 5 disposed in the annular passage D. In a powder quantitative feeder configured to continuously supply a fixed amount of powder, the vertical wall surface 7 of the supply plate 2 is removed by a scraping member 6 disposed in the annular passage D at a position behind the discharge gate 5.
A method for scraping back residual powder, which comprises scraping back residual powder adhering to an annular passage D.