JP6069010B2 - Suction metering feeder - Google Patents

Description

  The present invention relates to a powder suction and metering device for sucking and weighing powder and discharging it to a supply destination.

  As a powder supply device that quantitatively supplies and discharges powder in a storage container, there are known rotary feeders (for example, see Patent Document 1), vibration dampers (for example, see Patent Document 2), and the like.

Japanese Examined Patent Publication No. 4-53778 JP 2006-82942 A

  The conventional powder supply apparatus described above has a problem that is desired to be improved.

  That is, the conventional powder supply apparatus can measure and supply the powder, but cannot perform a series of operations such as sucking, measuring, and discharging the powder in the storage container to the supply destination. In addition, the device and structure are complicated, such as a rotating device for measurement and a vibration device.

  The present invention has been made in view of the above facts, and its technical problem is that a series of operations for sucking, weighing, and discharging powder can be continuously performed. It is to provide a simple suction metering device.

According to the present invention, as a suction metering supply device that solves the above technical problem, a suction container that sucks the powder in the storage container through a suction pipe in an intermittent manner, a weighing means that measures the powder sucked together with the suction container, Opening / closing means for opening and closing the bottom discharge port for discharging powder from the suction container, and suction by the suction container, measurement by the weighing means, and discharge by the opening / closing means are repeated several times in order, A controller for discharging the powder, a storage-side on-off valve that opens and closes the connection between the suction pipe and the storage container, and an air-release valve that opens and closes the downstream side of the suction pipe near the storage-side on-off valve to the atmosphere When provided with the controller, wherein the suction, metering, and discharge processes, the full flow step of repeating a plurality of times, after the full flow process is adjusted to the total amount of discharged powder becomes a predetermined amount The storage side open / close valve is closed at the end of each of multiple suctions in the large input process, or multiple times in the middle of each of the multiple suctions at the end of each of the multiple suctions. There is provided a powder suction metering and feeding device characterized in that an open valve is opened and the residual powder in the suction pipe is sucked .

  A suction-side on-off valve that opens and closes the connection between the suction pipe and the suction container; and a pressurizing valve that opens and closes to supply pressurized air to the suction pipe between the suction-side on-off valve and the storage-side on-off valve; The suction pipe is formed by a flexible hose, and the controller closes the suction-side on-off valve and the atmospheric release valve with the storage-side on-off valve closed after each of the large charging steps, and pressurizes the Is opened, the suction pipe is expanded, and the powder adhering to the suction pipe is peeled off.

  The controller also adjusts the amount of sucked powder by intermittently sucking the atmosphere by opening and closing the atmosphere release valve a plurality of times during the suction in the small charging step.

A suction metering supply device constructed according to the present invention comprises a suction container that sucks the powder in the storage container intermittently through a suction pipe, a metering means for metering the powder sucked together with the suction container, and a powder in the suction container. An opening / closing means for closing the discharge port of the bottom portion to be opened and closed, a controller for sucking with a suction container, weighing with a weighing means, and discharging with an opening / closing means in order several times, and discharging a predetermined amount of powder from the discharge port ; A storage-side on-off valve that opens the connection between the suction pipe and the storage container so as to be openable and closable, and an air release valve that closes the downstream side of the suction pipe near the storage-side on-off valve so as to be able to open and close to the atmosphere . The suction, weighing, and discharging steps are divided into a large charging step that is repeated a plurality of times and a small charging step that adjusts the total amount of discharged powder to a predetermined amount after the large charging step. In addition, the storage side open / close valve is closed, the air release valve is opened, and suction is performed at the end of each of a plurality of suctions in the large charging step, or at the end of each of a plurality of suctions and in the middle of each of a plurality of suctions. The residual powder in the pipe is sucked.

  Accordingly, it is possible to provide a powder suction and metering supply device that can continuously perform a series of operations of sucking, weighing, and discharging the powder to a supply destination, and having a simple device and structure.

BRIEF DESCRIPTION OF THE DRAWINGS Structure explanatory drawing of the suction metering supply apparatus comprised according to this invention. The graph which shows one form of suction, measurement, and supply of powder by a controller. The graph which shows other forms of suction of the powder by a controller, measurement, and supply.

  Hereinafter, a powder suction and metering apparatus constructed according to the present invention will be described in more detail with reference to the accompanying drawings illustrating a preferred embodiment.

  A description will be given with reference to FIG. The suction metering supply apparatus generally indicated by numeral 2 includes a suction container 8 that sucks the powder in the storage container 6 through the suction pipe 4 in an intermittent manner, a weighing means 10 that measures the powder sucked together with the suction container 8, and a suction unit. Opening / closing means 12 for closing the discharge port 8a for discharging the powder in the container 8 so as to be openable and closable, suction by the suction container 8, weighing by the measuring means 10, and discharging by the opening / closing means 12 are repeated a plurality of times in order. And a controller 14 for discharging a predetermined amount of powder from the container.

  The suction container 8 includes a vertically long cylindrical main body 8b, a bottom discharge port 8a, and a suction device 8c that generates an ejector-type suction negative pressure at the head. The suction pipe 4 is connected between the upper and lower sides of the main body 8b. The suction metering supply device 2 repeats the suction, metering, and discharge of the powder a plurality of times in order to discharge a predetermined amount of powder from the discharge port 8a, so that the suction container 8 has one batch (shown in shaded in FIG. 1). ) Size of powder can be accommodated. Therefore, the suction container 8 is formed in a relatively small size.

  The suction machine 8c operates based on a command from the controller 14.

  The measuring means 10 is a scale that supports the suction container 8 and measures the weight of the powder sucked together with the suction container 8. The weight of the measured powder is output to the controller 14.

  The discharge port 8 a of the suction container 8 is closed by a flap valve 12 a that can be opened and closed by the opening / closing means 12. The flap valve 12a is opened and closed by a pneumatic cylinder 12b that operates based on a command from the controller 14.

  The suction pipe 4 connecting the suction container 8 and the storage container 6 is formed by a flexible hose, for example, a vinyl chloride hose. An openable / closable storage-side on-off valve 16 is attached to the connection portion between the suction pipe 4 and the storage container 6 in an open state. A suction-side on / off valve 18 that can be opened and closed is attached to the connecting portion between the suction pipe 4 and the suction container 8 in an open state.

  The storage-side on-off valve 16 and the suction-side on-off valve 18 are configured by well-known commercially available pinch valves and operate based on commands from the controller 14. The pinch valve includes a rubber sleeve that forms a cylindrical passage in a metal cylinder, and the passage is closed by introducing pressurized air between the metal cylinder and the sleeve.

  On the downstream side of the suction pipe 4 near the storage side opening / closing valve 16, an atmosphere release valve 20 is attached in a closed state so as to be opened and closed to the atmosphere. In addition, a pressurizing valve 22 that supplies pressurized air to the suction pipe 4 between the suction-side on-off valve 18 and the storage-side on-off valve 16 and that can be opened and closed is provided. The atmosphere release valve 20 and the pressurization valve 22 are opened and closed based on a command from the controller 14.

  An air filter 24 for air sucked into the suction pipe 4 together with the powder in the storage container 6 is provided upstream of the storage container 6.

  A hopper 26 as a supply destination of the measured powder is located below the discharge port 8a of the suction container 8.

Suction of residual powder in the pipe:
In the suction metering supply device 2, the powder remaining in the suction pipe 4 when the suction by the suction container 8 is stopped, the storage side opening / closing valve 16 is closed in the state where the powder is sucked by the suction container 8, and the atmosphere By opening the release valve 20, suction can be performed and the inside of the suction pipe 4 can be cleaned. In the following description, this process may be simply referred to as “residual powder cleaning”.

Peeling of powder adhering to the pipe:
In the suction metering supply device 2, the powder remaining after adhering to the suction pipe 4 sucks the powder into the suction container 8, and then closes the storage-side on-off valve 16, the suction-side on-off valve 18, and the air release valve 20, By opening the pressurizing valve 22 and inflating the suction pipe 4, it can be peeled off from the inside of the suction pipe 4. In the following description, this process may be simply referred to as “polishing removal”.

  Referring to FIG. 2 together with FIG. 1, the operation procedure of powder suction, metering, and discharging by the suction metering supply device 2 will be described as an example where 80 kg of powder is supplied and discharged.

(1) Large input process, small input process:
The controller 14 adjusts the steps of sucking, weighing, and discharging the powder so that the target 20 kg is repeated four times and the total amount of powder discharged after the large charging step is a predetermined 80 kg. It is divided into small input processes. At the end of each of the four suctions, the storage-side on / off valve 16 is closed and the air release valve 20 is opened to perform “residual powder cleaning” for sucking the powder remaining in the suction pipe 4.

(2) Large input:
In the first three large inputs, each is set to “suction 19.9 kg”, and the powder is sucked and weighed. At the end of each suction, “residual powder cleaning” is performed, and weighed and discharged. The final fourth suction amount is set so that the total of four measurements approaches 80 kg based on the first three “suction” and “residual powder cleaning” measurement results.

(3) Small input:
As the small input, the controller 14 is set so as to suck an amount that is less than the target 80 kg for the large input, for example, 0.1 kg. Further, during the small suction “suction”, the atmosphere release valve 20 is opened and closed several times to intermittently suck the atmosphere, thereby finely adjusting the amount of sucked powder.

  With reference to FIG. 3 together with FIG. 1 and FIG. 2, a form suitable for handling adhesive powder will be described. The basics of suction, metering, and discharge in this form are the same as those described above. Therefore, the description of the overlapping part is omitted.

  Examples of the powder having adhesiveness include powders such as titanium oxide and PVDF (polyvinylidene fluoride).

  In this process, “pollution removal” is performed at the end of each of the four “suctions” of large input. That is, the storage side opening / closing valve 16, the suction side opening / closing valve 18 and the air release valve 20 are closed, the pressurizing valve 22 is opened, the suction pipe 4 is expanded, and the powder adhering to the suction pipe 4 is peeled off. Furthermore, “residual powder cleaning” is performed a plurality of times in the middle of each of the four “suctions”.

  The effect of the suction metering supply device 2 as described above will be described.

  The powder suction and metering supply device 2 includes a suction container 8 that sucks the powder in the storage container 6 through the suction pipe 4 in an intermittent manner, a weighing unit 10 that measures the powder sucked together with the suction container 8, and a suction container 8. Open / close means 12 that closes the bottom discharge port 8a for discharging the powder, and suction by the suction container 8, metering by the metering unit 10, and discharge by the open / close unit 12 are sequentially repeated a plurality of times. A controller 14 for discharging a predetermined amount of powder is provided.

Accordingly, it is possible to provide a suction metering supply device that can continuously perform a series of operations for sucking, weighing, and discharging powder to a supply destination, and having a simple device and structure.
That is,
(1) Pneumatic transportation and weighing of powder can be performed simultaneously.
(2) A powder feeder such as a rotary feeder or a vibration damper is not required for weighing.
(3) Since it is a batch measurement, the suction container 8 can be made small, and since a conventional powder supply device is not required, the device configuration and structure are simple.
(4) Since it is batch metering, a desired small to large amount of powder can be dealt with depending on the number of times of metering, so the metering range is wide.

  The controller 14 divides the suction, metering, and discharge processes into a large input process that is repeated a plurality of times and a small input process that adjusts the total amount of discharged powder to a predetermined amount after the large input process. Do. Therefore, the predetermined time can be efficiently supplied by shortening the measuring time.

  Further, a storage-side on-off valve 16 that opens the connection between the suction pipe 4 and the storage container 6 so as to be openable and closable, and an air-release valve 20 that closes the downstream side of the suction pipe 4 near the storage-side on-off valve 16 so as to open and close to the atmosphere. And the controller 14 closes the storage-side on-off valve 16 at the end of each of a plurality of suctions in the large charging step or a plurality of times in the middle of each of a plurality of suctions at the end of each of a plurality of suctions, The release valve 20 is opened, and “residual powder cleaning” is performed to suck the residual powder in the suction pipe 4.

  Also, a suction-side on / off valve 18 that opens and closes the connection between the suction pipe 4 and the suction container 8 and an opening / closing for supplying pressurized air to the suction pipe 4 between the suction-side on-off valve 18 and the storage-side on-off valve 16 The suction pipe 4 is formed by a flexible hose, and the controller 14 closes the storage side opening / closing valve 16 and the atmospheric air with the storage side opening / closing valve 16 closed after each large charging step. The release valve 20 is closed, the pressurization valve 22 is opened, the suction pipe 4 is expanded, and “powder removal” is performed to separate the powder adhering to the suction pipe 4.

  Therefore, since the amount of powder remaining in the suction pipe 4 can be sampled by “residual powder cleaning” and / or “flocculation removal”, the setting of large input or small input can be set as close to a predetermined value as possible. Time can be shortened.

  The controller 14 also adjusts the amount of powder sucked by intermittently sucking the air by opening and closing the air release valve 20 a plurality of times during the suction in the small charging step. Therefore, a predetermined amount of powder can be supplied more easily and accurately.

2: Suction metering supply device 4: Suction pipe 6: Storage container 8: Suction container 8a: Discharge port 10: Metering means 12: Opening / closing means 12a: Flap valve 14: Controller 16: Storage side on / off valve 18: Suction side on / off valve 20 : Air release valve 22: Pressurization valve 26: Hopper

Claims (3)

A suction container for sucking the powder in the storage container through the suction pipe in an intermittent manner;
A weighing means for weighing the powder sucked together with the suction container;
Opening and closing means for closing and opening the discharge port at the bottom for discharging the powder in the suction container;
A controller for sequentially discharging the suction by the suction container, the measurement by the weighing means, and the discharge by the opening and closing means a plurality of times, and discharging a predetermined amount of powder from the discharge port;
A storage-side opening / closing valve that opens and closes the connection between the suction pipe and the storage container;
An air release valve that closes and opens the downstream side of the suction pipe near the storage side open / close valve to the atmosphere ; and
The controller
The suction, weighing, and discharging processes are divided into a large charging process that is repeated a plurality of times and a small charging process that adjusts the total amount of discharged powder to a predetermined amount after the large charging process. Close the storage side open / close valve, open the air release valve, and open the air release valve at the end of each of the multiple suctions in the charging process, or in the middle of each of the multiple suctions at the end of each of the multiple suctions. Sucking the remaining powder,
An apparatus for sucking and feeding powder. A suction-side on / off valve that opens and closes the connection between the suction pipe and the suction container;
A pressurizing valve that can be opened and closed to supply pressurized air to the suction pipe between the suction side on-off valve and the storage side on-off valve, and the suction pipe is formed by a flexible hose,
The controller
After each of the large charging steps, with the storage-side on-off valve closed, the suction-side on-off valve and the air release valve are closed, the pressurization valve is opened, the suction pipe is expanded, and the powder adhering to the suction pipe is removed. Peel off,
The suction metering device according to claim 1 . The controller
During the suction in the small charging step, the air release valve is opened and closed several times to adjust the amount of powder sucked by intermittently inhaling the atmosphere.
The suction metering supply device according to claim 1 or 2 , characterized by the above.

Images