JPH0529070Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a feeding device for powder and granular materials that tend to adhere, such as pulverized coal, a feeding device for reducing pulsation in the discharge flow of powder, and a large-capacity feeding device. The present invention relates to a powder supply device that is effective for a large, large-capacity supply device installed at the bottom of a container hopper.

(Prior art) A conventional powder continuous supply device includes a rotary supply plate partially exposed outside the storage chamber at the bottom of the powder storage chamber, and an annular recessed portion on the top surface of the rotary supply disk to prevent the inside of the storage chamber. A scraper method in which powder and granules are filled into an annular recess of a rotary supply board, the rotary supply board is rotated, and a scraper inserted into the recess outside the storage chamber scrapes the powder and granules inside the annular recess upward and discharged. This is a continuous powder supply device.

In addition, as another continuous powder supply device, a partition plate having a powder discharge port is provided at the bottom of the powder storage chamber, and a rotary supply plate with blades protruding radially between the partition plate and the bottom surface is used. The powder and granules in the storage chamber are dropped into the spaces between the radial blades of the rotary supply board from the powder and granule discharge ports of the bulkhead plate to fill a predetermined amount, and the powder and granules between the blades are filled by rotating the rotary supply board. Japanese Utility Model Application Publication No. 57-17732 discloses a square-type feeding device in which bodies are rotated and transported and dropped from a discharge port provided at the bottom of the opposite side. Further, Japanese Utility Model Application Publication No. 128019/1984 discloses a silo discharging device in which a cone is provided at the bottom of the silo, a rotary blade is attached below the bottom surface of the cone, and powder is discharged from the center below the cone.

(Problem that the invention aims to solve) It is said that the conventional scraper-type powder continuous supply device can control the amount of powder discharged with high precision, but the amount of discharged particles increases upward and diffuses upward. As it falls under its own weight, the discharge flow of powder and granules is easily disturbed, making it difficult to obtain a stable steady flow.In addition, powder and granules that tend to adhere, such as coal powder, adhere to each other, reducing accuracy and causing turbulence in the flow. It was happening. Furthermore, there was a problem in that accuracy deteriorated under conditions of high powder pressure, making it difficult to use in large-capacity products.

Further, the square-type powder continuous feeding apparatus disclosed in Japanese Utility Model Application Publication No. 57-17732 is suitable for large-capacity applications, but there are problems in that the accuracy is not good and there is pulsation in the discharge flow. Further, in the silo dispensing device disclosed in Japanese Utility Model Application Publication No. 128019/1984, the influence of the powder pressure inside the silo was large, and the structure was not suitable for quantitative supply.

(Means for solving the problems) The present invention solves these conventional problems and provides an excellent powder continuous flow with high precision, a structure with less adhesion, and a large capacity that can provide a stable steady flow. The purpose is to provide a supply device.

The gist of the present invention is to install a rotary disk that forms the bottom surface of a storage chamber containing powder and granules at the bottom, and to connect an inner ring and an outer ring to the outer periphery of the rotary disk using a plurality of lower connecting members. A bottomless annular cavity is provided, and a fixed bottom is provided below the annular cavity, and first and second hollow subchambers are connected in an annular manner on the outer periphery of the storage wall above the annular cavity. However, the first hollow sub-chamber and the lower part of the storage chamber communicate with each other through a slit-shaped communication opening in the storage chamber wall opened along the circumference, and the boundary between the second hollow sub-chamber and the first hollow sub-chamber is is provided with a partition plate that descends to the level of the upper surface of the annular cavity body, one of the lower ends of the partition plate is a cut end, and a partition plate is further inclined so as to be inserted into the annular cavity body below the middle of the second hollow auxiliary chamber. The continuous powder supply device is provided with a scraper that deflects the powdered granules downward, and has a discharge port opened below the scraper.

(Function) In the present invention, the powder and granules flow from the lower part of the storage chamber through the communication port into the first hollow auxiliary chamber and the annular cavity to fill the annular cavity with the powder and granules. The powder and granules are stored up to a predetermined level in the subchamber. When the rotary disk rotates, the powder and granules in the annular cavity are rotated and transferred along with the rotation of the rotary disk due to the friction between the inner peripheral walls of the inner ring and the outer ring and the lower connecting member. When reaching the hollow auxiliary chamber 2, the lower end of the partition plate at its boundary is cut out to the level of the upper surface of the annular cavity. When the liquid is sent to the middle of the second hollow auxiliary chamber, it is forcibly deflected downward by a scraper inserted into the annular cavity, and is discharged downward from the discharge port located below. In this way, the powder and granules are constrained by the inner circumferential walls of the inner ring and outer ring, and are moved downward along the inclined surface of the scraper as if being pushed by the following powder and granules, so they are free as in the conventional method. The flow is forced, rather than diffused into space, and a steady flow can be ensured.

Further, since the powder and granules continuously come into contact with the inner circumferential walls of the scraper/inner and outer rings, they do not adhere to each other. Furthermore, the powder pressure in the storage chamber does not directly act on the annular cavity, but is significantly reduced at the communication port, so accuracy does not deteriorate even when a large volume is supplied.

(Example) Examples will be described below based on the drawings.

This embodiment is an example in which the powder continuous supply device of the present invention is installed in the storage chamber 1 of a large powder hopper. is 60%, and the second hollow subchamber 4 is 40%. The height of the communication port 5 is about 14 cm, and a fixed stirring blade 6 is attached to the first hollow subchamber 3. Furthermore, a fixed cone 7 is attached to a stay 17 at the center of the lower part of the storage chamber 1.
It is installed in

In the figure, 8 is a rotary disk, 9 is an inner ring, 10 is an outer ring, 11 is a lower connecting member, 12 is a partition plate, 13 is a lower end that acts as a cutting edge of the partition plate, 14 is a scraper, 15 is a discharge port, 16 is a motor that moves the rotary disk 8.

In this example, the powder in the reservoir is fixed cone 7
The liquid is pushed to the outer periphery so as not to be deflected, and enters the first hollow auxiliary chamber 3 through the communication port 5 while being stirred by the stay 17 and the upper surface of the rotary disk 8, and is stirred and discharged by the fixed stirring blade 6. While making the powder and granular material in the first hollow subchamber 3 homogeneous, the partition plate 12
The material is scraped off at the lower end 13 of the material, changed direction with a scraper 14, and discharged from a discharge port 15.

(Effects of the invention) As described above, according to the invention, since the powder is allowed to flow into the hollow sub-chamber through the communication port, the influence of the high powder pressure at the lower part of the storage chamber can be avoided, and the scraper By tilting it so that it discharges downward,
This enables stable, steady discharge with high accuracy and no pulsation as a steady discharge flow with no adhesion. Furthermore, it does not require a rotating stirring blade and can be operated with a small horsepower.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the embodiment, Fig. 2 is a longitudinal sectional view thereof, Fig. 3 is a partially cutaway plan view, and Fig. 4 shows the state of the powder along the circumference of the annular cavity. It is an explanatory diagram. 1... Storage chamber, 2... Annular cavity, 3... First hollow sub-chamber, 4... Second hollow sub-chamber, 5... Communication port,
8... Rotating disk, 9... Inner ring, 10... Outer ring, 11... Lower connecting member, 12... Partition plate, 1
4...Scraper, 15...Discharge port.

Claims (1)

[Scope of utility model registration request] A bottomless annular cavity is formed by installing a rotary disk that forms the bottom surface of the storage chamber for accommodating powder and granules at the bottom, and connecting an inner ring and an outer ring around the outer periphery of the rotary disk with a plurality of lower connecting members. A fixed bottom surface is provided below the annular cavity, first and second hollow sub-chambers are annularly connected to each other on the outer periphery of the storage wall above the annular cavity, and the first hollow The subchamber and the lower part of the storage chamber communicate with each other through a slit-shaped communication port in the storage chamber wall that opens along the circumference.
At the boundary between the second hollow auxiliary chamber and the first hollow auxiliary chamber, there is provided a partition plate that descends to the level of the upper surface of the annular cavity body, one of the lower ends of the partition plate is a cut edge, and a second hollow sub-chamber is provided. A continuous powder supply device that is provided with a scraper that deflects the inclined powder downward so as to be inserted into an annular cavity at the lower middle of a hollow auxiliary chamber, and a discharge port is opened below the scraper.