JPH0120345Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a powder quantitative feeder that quantitatively supplies powder to an air transport pipe.

A conventional powder metering feeder will be explained based on FIG. In the figure, when powder is conventionally supplied from a quantitative feeder 01 and transported by air, a rotary valve 02 and a mixer 03 are installed below the feeder 01. In addition, in order to install the transport pipe 04 for pneumatic transport, the horizontal pipe 04a is first installed due to the shape of the mixer 03, and then the vertical pipe 04c is installed via the curved pipe 04b.
was installed.

In the figure, 05 is a powder supply hopper, 06 is a slide gate that partitions the hopper 05 and a scraper 07 provided below it, and 07 is a slide gate that feeds the powder input from the hopper 05 to the quantitative feeder 01. The raking machine 08 is a chute provided below the quantitative feeder 01, and 09 is a blower that supplies pressurized air to the transport pipe 04.

However, such a device requires space for installing the mixer 03, rotary valve 02, and horizontal pipe 04a, and also requires space for installing the mixer 03, the rotary valve 02, and the horizontal pipe 04a.
3 and the curved portion 04b of the piping, causing clogging, making long-term continuous operation impossible.

In addition, there was a drawback that manual labor was required to remove the clog.

The present invention has been proposed with the aim of solving the above-mentioned drawbacks.

The present invention communicates the powder supply hopper 5 and the casing body 7a via the rotary valve 6, and also connects the powder supply hopper 5 and the casing body 7a directly below the rotary valve 6.
A powder quantitative feeder is provided with a powder scraping impeller 7b that rotates around a vertical axis inside a, the metering feeder casing body 1a having one end communicating with the lower surface of the casing body 7a, and the casing body 1a, and is arranged to overlap a part of the powder scraping impeller 7b at the lower part of the communication part between the casing body 7a and the quantitative feeder casing body 1a. The present invention is characterized by comprising an impeller 1b that is fixed to the main body 1b, and a transport pipe that communicates directly with the other end of the metering machine casing body 1a in the vertical direction and communicates with the impeller 1b so that the entire blade length of the impeller 1b enters therein. This is a powder metering machine.

The powder from the powder supply hopper 5 passes through the rotary valve 6 and is fed into the casing body 7a, where it is once leveled by the powder scraping impeller 7b, and
The lumps in the powder are crushed, and then as the powder scraping impeller 7b rotates, the powder is scraped into the communication part between the casing body 7a and the metering feeder casing body 1a, and the powder is scraped into the metering feeder casing. The powder is fed into the main body 1a, and as the impeller 1b rotates, a certain amount of the powder is sandwiched between the impeller blades and is continuously mixed into the transport pipe.

In other words, the powder supplied from the powder supply hopper 5 is stirred by the powder scraping impeller 7b to have uniform properties without lumps, and then a certain amount of powder is transported by the impeller 1b. Since it will be mixed directly into the pipe, mixer 03 is used as in the conventional device.
It is not necessary to install horizontal piping 04a or slide gate 06, and space can be saved.

Furthermore, since the transport pipes are provided in the vertical direction, the powder does not fall in lumps as in the conventional case, and the transport pipe system is not clogged.

Next, one embodiment of the device of the present invention will be described based on the drawings. 2 and 3 show the apparatus of this embodiment. In the figure, a quantitative feeder 1 installed to cut out a fixed amount of powder is attached below a scraper 7 installed to feed the powder into the quantitative feeder 1. Further, a rotary valve 6 is installed above the scraper 7 for supplying powder to the scraper 7 while blocking air.

The metering feeder 1 has openings 11 in the upper and bottom walls of the metering feeder casing body 1a near the blade tip of the impeller 1b so that an air transport pipe can be connected directly.
and 12 are provided, and connection seats 1 are provided in the same openings 11 and 12.
3 and 14 are provided, and an air transport pipe (not shown) is vertically connected to these connecting seats.

In the figure, 1b is the quantitative feeder casing body 1.
1c is a drive device that rotates the impeller 1b, 5 is a powder supply hopper, 7a is a casing body of the scraper 7, and 7b is inside the casing body 7a. The provided impeller for scraping powder, 7c is a drive device for rotating the impeller 7b, and the arrow indicates the flow direction of the transport air.

In such a device, the powder introduced into the hopper 5 is introduced into the casing of the scraper 7 through the rotary valve 6, and is scraped toward the quantitative feeder side by the rotation of the impeller 7b, and is then passed through the opening 7d. The liquid is fed into the casing main body 1a of the metering feeder 1, and further sent to the left by the rotation of the impeller 1b.

Thereafter, the air is supplied from the opening 11 into a transport pipe (not shown) in the direction of the arrow.

In the present invention, air leaking from the gap between the casing body 1a and the rotary impeller 1b of the metering feeder 1 is blocked by the rotary valve 5, and the connection seats 13 and 14 of the air transport pipe are attached to the metering feeder 1, and the metering Powder is directly supplied from the supply machine 1 to the air transport pipe.

As described above, the present invention is based on the powder supply hopper 5.
In the powder quantitative feeder, the casing body 7a is communicated with the casing body 7a through the rotary valve 6, and a powder scraping impeller 7b rotating around a vertical axis is provided inside the casing body 7a directly below the rotary valve 6. Quantitative feeder casing body 1a with one end communicating with the lower surface of the casing body 7a
1 of the powder scraping impeller 7b rotates around a vertical axis inside the casing body 1a and is located at the lower part of the communication portion between the casing body 7a and the quantitative feeder casing body 1a.
an impeller 1b disposed so as to overlap the main body 1a, and a transport pipe that communicates directly with the other end of the quantitative feeder casing body 1a in the vertical direction and communicates with the entire blade length of the impeller 1b. Unlike conventional equipment, it does not require a mixer or horizontal piping, and since the powder is directly mixed into the vertical transport pipe, there is no possibility of clogging the transport pipe system. There is no.

Therefore, it is possible to simplify the device and save space.
In addition, no manpower is required to remove the clog, resulting in a cost reduction effect in terms of equipment and manpower.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram schematically showing a powder quantitative feeder attached to a conventional pneumatic conveying device, Fig. 2 is a longitudinal sectional elevational view showing an embodiment of the device of the present invention, and Fig. 3 is the same as Fig. 2. FIG. DESCRIPTION OF SYMBOLS 1...Quantitative feeder, 1a...Quantitative feeder casing body, 1b... Impeller, 1c... Drive device for impeller 1b, 5... Powder feed hopper, 6...
Rotary valve, 7... scraper, 7b... impeller, 11, 12... opening, 13, 14... connection seat.

Claims (1)

[Scope of utility model registration request] The powder supply hopper 5 and the casing body 7a communicate with each other via a rotary valve 6, and a powder scraping impeller 7b that rotates around a vertical axis is provided inside the casing body 7a directly below the rotary valve 6. In the feeder, a quantitative feeder casing body 1a having one end communicating with the lower surface of the casing body 7a, a metering feeder casing body 1a rotating about a vertical axis inside the casing body 1a, and At the lower part of the communication part with the casing main body 1a, an impeller 1b is arranged so as to overlap a part of the powder scraping impeller 7b, and an impeller 1b is arranged directly in the vertical direction of the other end of the quantitative feeder casing main body 1a. A powder metering feeder comprising: a transport pipe communicating with the impeller 1b such that the entire blade length of the impeller 1b enters therein.