JP2004309244A - Powder weighing/supplying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable low-cost, accurate weighing and retrofitting to an already-existing powder supplying device in a powder weighing/supplying device for continuously or intermittently weighing the amount of supply of powder to be supplied by the powder supplying device. <P>SOLUTION: In the powder weighing/supplying device, an opening 2a and a discharge port 2b are provided on an upper and bottom surfaces, respectively, in a casing 2 mounted in a lower portion at an outlet 11a of a hopper 11; a supply board 4, where a plurality of blades 4a radially project to an outer-periphery edge, is supported by the bottom section of the casing 2; and a slide plate 2c having a throw port is provided in the upper end height of the blades 4a of the supply board 4 so that the rotation trace surface of the blades 4 is covered. Additionally, in the powder weighing/supplying device, a controller 10 is provided. In the controller 10, a weighing hole 2e is opened on the bottom surface of the casing 2 on which a specific amount of powder accommodated in a powder space 4b divided by the outer-periphery wall surface of the supply board 4, the side of blades 4a, the inner wall surface of the casing 2, and the bottom surface passes; the measuring surface of a load cell 8 is provided in the weighing hole 2e, the weight of the powder passing on the measuring surface is measured; and the amount of supply of the powder is weighed, based on the weighing value and the speed of the supply board 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a powder metering and feeding device that continuously or intermittently measures the weight of powder supplied from the powder storage chamber to the outside and measures the supply amount, and in particular, can accurately measure at low cost, In addition, the present invention relates to a technique for enabling retrofitting to an existing powder supply device.
[0002]
[Prior art]
As shown in FIG. 11, a conventional powder weighing and feeding device is provided with a load cell 24 for measuring the own weight of a hopper storing powder, attached to a weighing hopper 23 main body separate from the charge hopper 20, and In general, a weight loss formula is used in which the supply amount is measured as the weight value of the supplied powder by subtracting the current weight value from the initial weight value when the powder is discharged (see Patent Document 1).
[0003]
By the way, the above configuration requires two hoppers, one for charging and one for weighing, and is originally a high-cost facility. In addition, if the insufficient powder is charged from the charge hopper 20 to the weighing hopper 23 in parallel with the supply, the weighing value changes due to the impact, and weighing cannot be performed during charging. No abnormality could be found even if the supply condition changed. Further, if the capacity of the feeder is increased in order to shorten the charging time, there is a problem that the equipment cost rises.
[0004]
[Patent Document 1]
JP, 2002-323365, A
[Problems to be solved by the invention]
The problem to be solved by the present invention is to solve these problems of the prior art, and to perform parallel weighing without being affected by impact even while charging the powder in the hopper, and to provide a single weighing hopper without a separate hopper. An object of the present invention is to provide a powder measuring and feeding device which can be measured at low cost by a hopper and can be retrofitted to an existing powder feeding device.
[0006]
[Means for Solving the Problems]
The configuration of the present invention that has solved such a problem includes:
1) An opening communicating with the outlet of the powder storage chamber is provided on the upper surface of the casing mounted below the outlet of the powder storage chamber, and the discharge port is provided on the bottom face. A radially protruding supply plate is rotatably provided at the bottom of the casing, and a sliding plate provided with an inlet is provided so as to cover the rotation locus surface of the supply plate at the upper end height of the supply plate. The space partitioned by the blades and the bottom surface of the casing is a powder space in which a predetermined amount of powder dropped from the input port of the sliding plate is stored, and the powder that has been cut off by the rotation of the supply plate is discharged from the discharge port to the outside. In a powder supply device capable of supplying a fixed amount of powder, a measuring hole is opened at a position through which the ground powder on the bottom of the casing passes, and a measuring surface of a weight measuring device is disposed in the measuring hole. Measure the weight of the powder passing through the measuring surface The powder supply amount can be measured based on the number of rotations of the powder. 2) A powder metering / supplying device characterized in that a casing attached below a discharge port of the powder storage chamber has a discharge port of the powder storage chamber. An opening for communication is provided on the top surface, a discharge port is provided on the bottom surface, and a plurality of blades are radially protruded at predetermined intervals on the outer periphery of the disk. A plate is provided so as to cover the rotation trajectory surface of the blade at the height of the upper end of the blade of the supply plate, and an auxiliary supply plate of the same structure as the supply plate is mounted on the rotation shaft of the supply plate on the partition plate, and the partition plate is loaded. A sliding plate provided with an inlet at a position facing the opening is provided so as to cover the rotation locus surface of the blade at the upper end height of the blade of the auxiliary supply plate, and the blade, the partition plate and the casing of the supply plate and the auxiliary supply plate are provided. Each space separated by the bottom of the A powder space in which a predetermined amount of powder dropped from the inlet is accommodated, and a predetermined amount of powder that has been slid off by the rotation of the auxiliary supply board is transferred to the powder space of the lower supply board, and is externally discharged from the discharge port. A powder supply device capable of supplying a fixed amount to a measuring device, wherein a measuring hole is opened at a position where the ground powder on the bottom of the casing passes, and a measuring surface of a weight measuring device is disposed in the measuring hole. A powder metering / supplying device characterized in that the weight of the powder passing through the measuring surface is measured, and the amount of powder supplied can be measured based on the weight value and the number of rotations of the supply board 3). The height of the blades of the supply plate is made higher than the blades of the auxiliary supply plate, so that when the powder cut off by the auxiliary supply plate is stored in the powder space of the supply plate, an air layer is formed above the powder. The powder weighing according to 2), wherein the load from the partition plate is eliminated so as not to affect the weighing. 4) The supply device according to any one of 1) to 3) above, wherein a film-like sealing member is stretched between the measuring hole of the casing and the measuring surface of the weight measuring device to prevent the powder from leaking from the measuring hole. Powder metering / supplying device 5) A plurality of outlets are provided at the lower part of the powder storage chamber, and the powder metering / supplying device according to any of the above 1) to 4) is attached to each of the outlets, and the powder is independently supplied. It is in powder supply equipment that can supply in multiple directions while measuring.
[0007]
[Action]
According to the present invention, a measuring hole is opened in a part of the lower part of the casing of the powder supply device, and the measuring surface of the weighing device is arranged in the measuring hole. The weight of the powder alone is measured continuously or intermittently. Therefore, since the weight including the hopper is not measured as in the past, weighing can be performed with one hopper without separately requiring a weighing hopper, and charging is performed as long as the impact of charging does not directly propagate from the hopper to the powder supply device. Can also be weighed. In addition, since it has a simple structure in which the lower part of the casing is opened, it can be easily retrofitted to the existing powder supply device without requiring large-scale construction, and can be implemented at low cost.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present invention, when a film-like sealing member such as a diaphragm is stretched between the measurement hole of the casing and the measurement surface of the weight measuring device, leakage of the powder from the measurement hole can be prevented and accurate measurement can be performed. As the weighing means, there is provided a controller having a program or a circuit for measuring the weight of the powder passing through the measurement surface and calculating the supply amount of the powder based on the weight value and the rotation speed of the supply board.
[0009]
A partition plate with an inlet is provided so as to cover the rotation trajectory surface of the blade at the height of the upper edge of the blade of the supply plate, and an auxiliary supply plate with the same structure as the supply plate is mounted on the rotation shaft of the supply plate on the partition plate Then, when a sliding plate provided with an input port at a position facing the input port of the partition plate is provided at the upper end height of the blade of the auxiliary supply plate so as to cover the rotation trajectory surface of the blade, the rotation of the auxiliary supply plate The fixed volume of powder that has been worn out is transferred to the powder space of the lower supply plate and is stably supplied to the outside from the discharge port. When the height of the blades of the supply board is made higher than the blades of the auxiliary supply board, an air layer is formed above the powder when the powder cut by the auxiliary supply board is stored in the powder space of the supply board, The load from the partition plate can be eliminated so as not to affect the weighing.
[0010]
The supply board generally has a structure in which a plurality of blades are radially protruded at predetermined intervals on the outer peripheral edge of the disk, and a space defined by the supply board blades, the inner wall surface, and the bottom surface of the casing is a powder space. However, it is also possible to adopt a structure in which a ring is further attached to the outer periphery of the supply board, and a space defined by the blades of the supply board, the inner wall surface of the ring, and the bottom of the casing is used as a powder space. Also, when a plurality of outlets are provided at the lower part of the powder storage chamber such as a large stirring cylinder and the powder metering / supplying device of the present invention is attached to each outlet, the powder can be measured independently and simultaneously in multiple directions. Can be supplied to Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
[0011]
【Example】
Embodiment 1 (see FIGS. 1 to 4): Embodiment 1 shown in FIGS. 1 to 4 is an example in which a single-stage supply board is provided. FIG. 1 is a partial cross-sectional explanatory view of the powder measuring and feeding device of the first embodiment, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, FIG. 3 is an explanatory diagram showing the powder measuring of the first embodiment, and FIG. FIG. 2 is a sectional view taken along line AA of FIG.
[0012]
In the drawing, 1 is a powder metering device, 2 is a casing, 2a is an opening, 2b is a discharge port, 2c is a sliding plate, 2d is an input port, 2e is a measuring hole, 2f is a mounting jig, and 3 is deceleration. Motor, 3a is a rotating shaft, 4 is a supply board, 4a is a blade, 4b is a powder space, 4c is a V ring, 6 is a stirring body, 7 is a diaphragm, 8 is a load cell, 8a is a weighing platform, and 8b is pressure receiving. A board, 8c is a bolt, 9 is an inverter, 10 is a controller, 11 is a hopper, 11a is a discharge port, 12 is a chute, A is an air layer, and F is a powder.
[0013]
As shown in FIGS. 1 and 2, a powder metering / feeding device 1 according to a first embodiment includes a casing 2 having a discharge port 11a of a hopper 11, which is a powder storage chamber, having an opening 2a on an upper surface and a discharge port 2b on a bottom surface. And a motor 3 with a speed reducer is attached to the lower part of the casing 2 and its rotating shaft 3a is vertically arranged in the casing 2, and a plurality of blades 4a are radially protruded from the outer peripheral edge of the rotating shaft 3a. A supply plate 4 is pivotally mounted at the bottom of the casing 2, a conical agitator 6 is pivotally mounted above the supply plate 4, and a semi-annular sliding plate 2 c is mounted on the inner wall of the casing 2 at the upper end of the blade 4 a of the supply plate 4. The inlet 2d is formed by mounting the blade 4a at a height so as to cover the rotation path surface of the blade 4a. As shown in FIG. 4, the sliding plate 2c is reduced in thickness thereafter including the measurement surface, so that a gap is formed at the upper end of the blade 4a.
[0014]
A measuring hole 2e is opened in the middle of the rotation trajectory of the blade 4a on the bottom surface of the casing 2, and a measuring hole 2e is formed on the surface of the weighing platform 8a of the load cell 8 which is a weight measuring device suspended on the outer edge of the lower surface of the casing 2 as shown in FIG. The pressure receiving plate 8b is mounted with bolts 8c via the diaphragm 7 having a larger opening area than that of the weighing platform 8a, and the diaphragm 7 projecting around the outer periphery of the weighing platform 8a is stretched in the measuring hole 2e so as to be sealed with the mounting jig 2f. . The controller 10 includes a control circuit that controls the motor 3 with a speed reducer, and an arithmetic circuit that calculates the supply amount of the powder F based on the rotation speed signal of the rotating shaft 3a and the measurement signal (weight value) of the load cell 8. I have.
[0015]
In the first embodiment, the powder F stored in the hopper 11 is taken into the opening 2a of the casing 2 from the discharge port 11a by the rotation of the supply plate 4 and the stirrer 6 by the driving force of the motor 3 with a reduction gear, and the powder F is stirred. The powder F is sent to the lower inlet 2 d while being stirred by the body 6, and the fed powder F is divided into powders separated by the side wall of the blade 4 a adjacent to the outer peripheral wall surface of the supply board 4 and the side wall surface and the bottom surface of the casing 2. The powder F stored in each of the powder spaces 4b is dropped and stored in the body space 4b, and the powder F stored in each of the powder spaces 4b is sequentially slid off by the sliding plate 2c by the rotation of the supply plate 4, and is substantially filled by the volume of the powder space 4b. It is transported in the circumferential direction in a state where it is held.
[0016]
The powder F accommodated in each powder space 4b passes over the pressure receiving plate 8b of the load cell 8 during the transfer in the circumferential direction as shown in FIG. At this time, since the air layer A is formed below the thinned sliding plate 2c as shown in FIG. 4, the influence of the air pressure on the pressure receiving plate 8b is reduced by equalizing the pressure with the discharge port 2b side or the outside during measurement. Prevention and accurate measurement. The weight of the powder F temporarily placed on the pressure receiving plate 8b is continuously or intermittently measured by the load cell 8, and the controller 10 determines the weight value of the load cell 8 and the rotation of the rotating shaft 3a per unit time. The supply amount of the powder F is calculated by a number and measured. The powder F is thereafter discharged from the discharge port 2b and supplied to a predetermined place by the chute 12.
[0017]
In the first embodiment, since the powder F is supplied directly on the measurement surface, the weight of the powder F alone is continuously or intermittently measured. Therefore, since the weight including the hopper is not measured as in the conventional case, weighing can be performed with one hopper without separately requiring a weighing hopper, and even during charging since the impact of charging does not directly propagate to the powder supply device. Weighing is now possible. In addition, since the measuring surface is provided in the measuring hole 2e formed in a part of the lower part of the casing 2, it can be easily retrofitted to the existing powder supply device without requiring large-scale construction. Can be implemented at cost.
[0018]
Embodiment 2 (see FIGS. 5 to 8): Embodiment 2 shown in FIGS. 5 to 8 is an example in which supply boards are provided in two upper and lower stages. 5 is a partial cross-sectional explanatory view of the powder metering and feeding device according to the second embodiment, FIG. 6 is a cross-sectional view taken along the line AA in FIG. 5, FIG. 7 is a cross-sectional view taken along the line BB in FIG. It is explanatory drawing which shows the sliding of powder. In the figure, 2g is a partition plate, 2h is an inlet, 5 is an auxiliary supply board, 5a is a blade, and 5b is a powder space.
[0019]
As shown in FIGS. 5 to 7, the powder metering and feeding apparatus 1 according to the second embodiment includes an auxiliary supply board 5 having a plurality of blades 5a radially protruding from an outer peripheral edge coaxially above a supply board 4 to each of the blades 4a. , 5a are axially mounted so that the vertical positions thereof are aligned with each other, and a semi-annular sliding plate 2c is attached so as to cover the rotation path surface of the blade 5a at the height of the upper end of the blade 5a of the auxiliary supply board 5, thereby forming an inlet 2d. A semi-annular partition plate 2g is attached between the auxiliary supply plate 5 and the supply plate 4 in a direction opposite to the sliding plate 2c so as to cover the rotation trajectory surface of the blade 4a to form an inlet 2h. The height of the blades 4a of the supply board 4 is 10% higher than the height of the blades 5a of the auxiliary supply board 5.
[0020]
In the second embodiment, the powder F sent to the charging port 2d is separated into powder spaces separated by the side surfaces of the blades 4a adjacent to the outer peripheral wall surface of the auxiliary supply board 5, the side wall surface of the casing 2, and the upper surface of the partition plate 2g. After being dropped and stored in each of the powder spaces 5b, the powder F stored in each of the powder spaces 5b is sequentially slid off by the sliding plate 2c by the rotation of the auxiliary supply board 5, and is substantially filled by the volume of the powder space 5b. It is transported in the circumferential direction in the state in which it is performed. Next, the powders F stored in the respective powder spaces 5b are sequentially dropped and stored in the respective powder spaces 4b of the supply plate 4 immediately below through the input ports 2h. The powder F dropped to 4b is transferred to the load cell 8 side along the circumferential direction.
[0021]
In this case, FIG. 8 (a), the since height _{H 2} of the blade 4a as shown in (b) is formed higher than the height _{H 1} of the blade 5a, volume powder space 5b of the powder space 4b It is getting bigger. Therefore, when the powder F cut off on the upper side is stored in the lower powder space 4b, the air layer A is formed on the powder F, so that the load pressure of the partition plate 2g is reduced by the air layer. Pressure fluctuations so as not to affect subsequent weighing. Further, by performing the sliding twice, the powder pressure of the powder F supplied from the discharge port 11a of the hopper 11 is relaxed, the impact is suppressed, and the measurement can be performed accurately. Otherwise, the reference numerals and configurations are the same as in the first embodiment.
[0022]
Embodiment 3 (see FIGS. 9 and 10): In Embodiment 3 shown in FIGS. 9 and 10, a plurality of powder measuring and feeding devices of Embodiment 1 are attached to a stirring cylinder so that powder can be supplied in multiple directions. It is an example of a body supply facility. FIG. 9 is a plan view of the powder supply equipment of the third embodiment, and FIG. 10 is a partially omitted side view of the powder supply equipment of the third embodiment. In the figure, 13 is a stirring cylinder, 14 is a stirring motor, 15 is a support, and 16 is a viewing window.
[0023]
In the third embodiment, as shown in FIGS. 9 and 10, three unillustrated outlets are formed on the lower surface of the stirring cylinder 13 including a stirring body (not shown) which is rotated by the stirring motor 14, and powder is provided at each of the outlets. The body measuring and feeding device 1 is attached so that the opening 2a of the casing 2 thereof communicates with the discharge port to constitute a powder supply facility, and the powder F discharged from each discharge port of the stirring tube 13 is The body weighing and feeding device 1 can simultaneously feed in multiple directions while weighing each independently. In addition, the reference numerals, configurations, and operations are the same as those of the first embodiment.
[0024]
【The invention's effect】
As described above, according to the present invention, the powder can be weighed in parallel without being affected by the impact during charging, and the weighing hopper can be weighed at a low cost without requiring a separate hopper. It is possible to provide a powder metering / feeding device that can be retrofitted to the feeding device.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional explanatory view of a powder metering and feeding device according to a first embodiment.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is an explanatory diagram showing powder weighing of an example.
FIG. 4 is a sectional view taken along line AA of FIG. 2;
FIG. 5 is a partial cross-sectional explanatory view of a powder metering and feeding device according to a second embodiment.
FIG. 6 is a sectional view taken along line AA of FIG. 5;
FIG. 7 is a sectional view taken along line BB of FIG. 5;
FIG. 8 is an explanatory diagram showing powder cutting in Example 2;
FIG. 9 is a plan view of a powder supply facility according to a third embodiment.
FIG. 10 is a partially omitted side view of a powder supply facility of a third embodiment.
FIG. 11 is an explanatory view of a conventional powder metering / supplying device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Powder measuring and feeding apparatus 2 Casing 2a Opening 2b Discharge port 2c Sliding plate 2d Input port 2e Measuring hole 2f Mounting jig 2g Partition plate 2h Input port 3 Motor with reduction gear 3a Rotary shaft 4 Supply board 4a Blade 4b Powder Space 4c V ring 5 Auxiliary supply board 5a Blade 5b Powder space 6 Stirrer 7 Diaphragm 8 Load cell 8a Weighing stand 8b Pressure receiving plate 8c Bolt 9 Inverter 10 Controller 11 Hopper 11a Discharge port 12 Chute 13 Stirring cylinder 14 Stirring motor 15 Support 16 Viewing window 20 Charge hopper 21 Charge feeder 22 Shutoff valve 23 Metering hopper 24 Load cell 25 Metering feeder A Air layer F Powder

Claims (5)

An opening communicating with the outlet of the powder storage chamber is provided on the top surface of the casing attached below the outlet of the powder storage chamber, the discharge port is provided on the bottom, and a plurality of blades are radially arranged at predetermined intervals on the outer peripheral edge of the disk. A protruding supply plate is rotatably provided at the bottom of the casing, and a sliding plate provided with an inlet is provided so as to cover the rotation locus surface of the supply plate at the height of the upper end of the blade of the supply plate. The space separated by the bottom surface of the casing is used as a powder space in which a predetermined amount of powder dropped from the inlet of the sliding plate is stored. In the powder supply device capable of supplying, a measuring hole is opened at a position through which the ground powder on the bottom of the casing passes, and a measuring surface of a weight measuring device is disposed in the measuring hole, and the measuring surface is provided. Measure the weight of the powder passing through the Powder metering device being characterized in that to be able to weigh the supplied amount of the powder based on the number. An opening communicating with the outlet of the powder storage chamber is provided on the top surface of the casing attached below the outlet of the powder storage chamber, the discharge port is provided on the bottom, and a plurality of blades are radially arranged at predetermined intervals on the outer peripheral edge of the disk. A projecting supply plate is rotatably provided at the bottom of the casing, and a partition plate having an inlet is provided so as to cover the rotation locus surface of the blade at the upper end height of the blade of the supply plate, and has the same structure as the supply plate. The auxiliary supply board is mounted on the rotary shaft of the supply board on the partition plate, and the sliding plate having the input port at a position opposite to the input port of the partition plate is rotated at the upper end height of the blade of the auxiliary supply board. Provided so as to cover the track surface, each space partitioned by the blades of the supply board and the auxiliary supply board, the partition plate, and the bottom surface of the casing is stored with a predetermined amount of powder dropped from the inlet of the partition plate and the sliding plate. Space that has been cut off by the rotation of the auxiliary supply board A powder supply device for transferring powder to a powder space of a lower supply board so as to be able to supply the powder from the discharge port to the outside at a position where the ground powder on the bottom of the casing passes. The measuring hole is opened, the measuring surface of the weight measuring device is arranged in the measuring hole, the weight of the powder passing through the measuring surface is measured, and the powder is measured based on the weight value and the rotation speed of the supply board. A powder measuring and feeding device characterized in that a feeding amount can be measured. The height of the blades of the supply plate is made higher than the blades of the auxiliary supply plate, so that when the powder cut off by the auxiliary supply plate is stored in the powder space of the supply plate, an air layer is formed above the powder. 3. The powder measuring and feeding device according to claim 2, wherein the load from the partition plate is eliminated so as not to affect the weighing. The powder metering and feeding device according to any one of claims 1 to 3, wherein a film-like sealing member is stretched between the measuring hole of the casing and the measurement surface of the weight measuring device so that powder does not leak from the measuring hole. . A plurality of outlets are provided at the lower part of the powder storage chamber, and the powder metering / supplying device according to any one of claims 1 to 4 is attached to each of the outlets so that powder can be supplied in multiple directions while independently measuring the powder. Powder supply equipment.

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