JP4122177B2 - Powder supply device with powder supply means - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for supplying powder to a powder storage tank and a powder supply apparatus including the means.
[0002]
[Prior art]
As a device for measuring a predetermined amount of powdered chemicals, foodstuffs and the like and feeding them to a supply destination, a storage tank for storing powder and a feeder having a powder measuring means, which are well known to those skilled in the art. A powder supply device that is provided and that supplies powder discharged from a supply port with pressurized air in a conveyance pipeline is widely used in practice.
[0003]
As a typical example of this powder supply apparatus, there is a blowing apparatus for blowing slaked lime and activated carbon for dioxin countermeasures continuously or periodically into an incinerator, for example.
[0004]
[Problems to be solved by the invention]
This conventional powder supply apparatus has the following problems to be solved regarding replenishment of powder to a storage tank for storing powder.
[0005]
(1) Powder supply:
The storage tank for storing the powder needs to be replenished continuously or periodically according to the supply amount. In this replenishment, for example, in a large incinerator facility where the powder supply device is operated continuously, a replenishment device for a storage tank that automatically transports and replenishes the powder is provided. In a small incinerator facility, powder is replenished manually using paper bags, pail cans, etc., and the replenishment work is troublesome.
[0006]
(2) Supply during operation:
During the operation of the powder supply apparatus, the pressurized air of the transfer pipeline acts on the powder supply port of the powder supply machine. This pressurized air leaks into the storage tank through the measuring means, and may blow up the powder in the storage tank or generate dust. Therefore, when the powder in the storage tank is reduced during the operation of the powder supply apparatus and needs to be replenished, the storage tank cannot be replenished with powder. To replenish the powder, it is necessary to stop the operation of the powder supply device.
[0007]
(3) Supply means:
An automated replenishment device is desired, as in the case of a powder supply device that is continuously operated for powder replenishment. However, depending on the operation mode, such a device is uneconomical. Development of a compact and simple replenishment means is desired.
[0008]
The present invention has been made in view of the above-mentioned facts, and its technical problem is that a powder supply apparatus that measures and supplies a predetermined amount of powder in a storage tank can easily replenish the storage tank with powder. can, and the operation of the powder supplying device can be performed without stopping, more compact by a simple, it is to provide a powder supply device provided with a powder complement Kyute stage to reservoir.
[0009]
[Means for Solving the Problems]
In the present invention, as a powder supply device equipped with a powder replenishing means for a storage tank that solves the above technical problem, a predetermined amount of powder storage tank and the powder in the storage tank are weighed into the transport line. A powder supply machine to be supplied; an air suction port connected to the storage tank; a pressurized air generating means connected to the conveyance pipe line; and a pressurized air generating means connected to the storage tank; A replenishment pipe for sucking and replenishing the powder into the storage tank by a suction force; and a switching means for switching the air suction port to the storage tank or outside air introduction. A rotary table having a plurality of measuring chambers for supplying to a supply port connected to a path; a closing member for closing the measuring chamber before and after the supply port; and a pressing means for pressing the closing member toward the measuring chamber. The measuring chamber is formed in a cylindrical hole shape, and the supply port covers the openings of a plurality of measuring chambers. Is formed to a size that, pressing pressure means is provided with adjusting means which enables adjusting the magnitude of the pressing force, it powder supplying device provided with a powder replenishing means, wherein is provided.
[0011]
Then, the powder is sucked into the storage tank and replenished by using, for example, the suction force of the blower or fan of the pressurized air generating means.
[0013]
The switching means switches the air suction port to the storage tank when the powder is replenished and to the outside air when the powder is not replenished. Further, the pressing means improves the sealing property between the conveyance pipe line via the measuring chamber and the storage tank so that the pressurized air does not leak into the storage tank. In addition, the pressing force can be adjusted according to the pressure of the pressurized air in the conveyance pipeline. Furthermore, the present invention provides a powder supply apparatus that is unitized and is compact and simple and includes powder supply means.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a powder supply apparatus including a powder replenishing means and a method for replenishing powder to a storage tank constructed according to the present invention will be described in more detail with reference to the accompanying drawings illustrating preferred embodiments.
[0015]
Referring to FIG. 1, a powder supply apparatus having a powder replenishing means generally indicated by reference numeral 2 measures a predetermined amount of powder storage tank 4 and powder in the storage tank 4. A powder feeder 8 to be supplied to a transfer destination by a transfer pipe 6, and a blower as a pressurized air generating means in which an air suction port 10 a is connected to the storage tank 4 and a pressurized air discharge port 10 b is connected to the transfer pipe 6. 10 and a supply pipe 12 connected to the storage tank 4.
[0016]
Between the air suction port 10a and the storage tank 4, the switching valve 16 which consists of a three-way valve is provided as a switching means which selectively switches the air suction port 10a to the storage tank 4 or the silencer 14 which is an external air introduction port. .
[0017]
The storage tank 4 has a cylindrical main body 4a whose lower part is gradually formed into a small-diameter funnel, a filter case 4b formed on the upper part of the main body 4a, and a plurality of pipes connecting the peripheral edge of the main body 4a and the lower base 18. Column 4c. The powder feeder 8 is attached to the lower end of the main body 4a. A suction pipe 20 connected to the switching valve 16 connected to the air suction port 10a is attached to the filter case 4b. The storage tank 4 has a substantially sealed structure except for the supply pipe 12 and the suction pipe 20.
[0018]
A filter 22 is attached in the filter case 4 b so that the powder in the storage tank 4 does not flow into the suction pipe 20. The filter 22 is a cartridge type for easy attachment / detachment and cleaning.
[0019]
The replenishment pipe 12 is connected to a replenishment nozzle 13 which is attached to the upper part of the main body 4a so as to extend inside. The other end of the replenishment pipe 12 is opened and inserted into a container 24 such as a paper bag or a pail can containing powder to be replenished. If necessary, the replenishment pipe 12 may be provided with a check valve (not shown) that allows only the flow from the container 24 toward the storage tank 4 to stop the back flow of the powder.
[0020]
A blower 10 as a pressurized air generating means is also mounted on the base 18. An air suction port 10 a of the blower 10 is connected to the switching valve 16, and a pressurized air discharge port 10 b is connected to the transport pipeline 6.
[0021]
The powder feeder 8 will be described with reference to FIGS. 2 and 3 together with FIG. First, a schematic configuration will be described. The powder feeder 8 includes a case main body 28 having a supply port 26 connected to the conveyance pipe 6 and a plurality of upper and lower openings for introducing powder and discharging it to the supply port 26. A rotary table 32 having a weighing chamber 30, a pair of upper and lower closing plates 34, 34 that slide and close the upper and lower openings of the weighing chamber 30 before and after the supply port 26, A pressing means 36 for pressing each of the measuring chambers 30 is provided.
[0022]
The rotary table 32 is a disc having a predetermined thickness T, and is rotated in a predetermined direction R shown in FIG. 2 by an electric motor M attached to the lower portion of the case body 28 around the axis 33. The measuring chamber 30 is formed in a cylindrical hole shape by opening a plurality of circumferentially on the outer edge portion of the rotary table 32, and two upper and lower sides on two pitch circles. The measuring chamber 30 has a large-diameter hole 30a on the outer pitch circle and a small-diameter hole 30b on the inner pitch circle.
[0023]
The ground plate 34 is formed in a rectangular flat plate shape as shown in FIG. 2, and a round hole 34a of the same size aligned with the supply port 26 is formed in the center of the flat plate. As shown in FIG. 2, the round hole 34 a is formed in a size that substantially surrounds one large-diameter hole 30 a and two small-diameter holes 30 b in the measuring chamber 30. Rectangular shape of the leveling plate 3 4, in the front and back in the direction of rotation R of the rotary table 32 around the circular hole 34 a, is formed to a size which closes almost six measuring chamber 30, respectively. As a result, a front closed area Z1 and a rear closed area Z2 are formed.
[0024]
When the rotary table 32 is rotated in a predetermined direction R, the weighing chamber 30 sequentially opens and closes the upper and lower openings in the storage tank 4 and introduces the powder into the introduction area X and the powder chamber into which the powder is introduced. Through the closed area Z1 before the upper and lower openings are closed, the discharge area Y where the upper and lower openings are opened to the supply port 26 and the powder is discharged, and the closed area Z2 after the upper and lower openings of the empty measuring chamber 30 are closed. Moved. Therefore, by defining the volume of the measuring chamber 30 and the rotational speed of the rotary table 32, a predetermined amount of the powder in the storage tank 4 is weighed and continuously discharged to the transport pipeline 6.
[0025]
Referring mainly to FIG. 3, the pressing means 36 presses the upper and lower scraping plates 34, 34 via the pressing plates 38, 38 in the front and rear closed areas Z 1, Z 2, respectively. A total of four pieces are attached to the case main body 28, one each in the upper and lower directions in the front closed area Z1, and one each in the upper and lower directions in the rear closed area Z2.
[0026]
The pressing means 36 includes a compression coil spring 36a for generating a pressing force, an adjusting means 36b having an advanceable / retractable screw member for adjusting a mounting load defined by the compression amount of the spring 36a, and a spring 36a. Display means 36c having a visible moving piece interlocking with the compression amount. Therefore, the pressing force can be arbitrarily adjusted by the adjusting means 36b while confirming the compression amount of the spring 36a by the display means 36c.
[0027]
The storage tank 4, the powder feeder 8, the blower 10 of the pressurized air generating means, and the supply pipe 12 are assembled on the base 18 as one unit.
[0028]
With reference to FIG. 1 mainly, the powder supply method to the storage tank 4 in the powder supply apparatus 2 as mentioned above is demonstrated.
[0029]
In order to replenish the powder in the external container 24 into the storage tank 4, the blower 10 of the pressurized air generating means is in an operating state, and the switching valve 16 is in a state where the air suction port 10 a of the blower 10 is connected to the storage tank 4. . Thus, the air in the storage tank 4 is sucked into the blower 10, and the powder in the container 24 is sucked into the storage tank 4 through the supply pipe 12 and replenished by this suction force.
[0030]
If the switching valve 16 is switched to the silencer 14 side of the outside air inlet, the connection between the air suction port 10a of the blower 10 and the storage tank 4 is disconnected, and the suction force of the storage tank 4 is lost. Supply will stop.
[0031]
The effect of the powder replenishment method and the powder supply apparatus 2 as described above will be described.
[0032]
(1) Easy powder supply to storage tank:
Because the powder is sucked into the storage tank 4 by using the suction force of the pressurized air generating means 10 for generating the pressurized air that flows through the transfer pipeline 6 that feeds the powder to the transfer destination. The powder can be easily supplied to the storage tank 4 when necessary. And the troublesome replenishment operation | work to the storage tank 4 by the manual operation using the conventional paper bag, a pail can, etc. can be excluded.
[0033]
(2) Replenishment during operation is possible:
Since the powder is supplied to the sealed storage tank 4 through the supply pipe 12, even if there is leakage of pressurized air in the transfer pipeline 6 into the storage tank during the operation of the powder supply apparatus 2, the powder is supplied to the outside. There is no generation of dust blown up by the powder, and the pressing means 36 adjusts the force for pressing the scraping plate 34, which is a closing member, into the measuring chamber 30 in accordance with the pressure of the pressurized air in the transport pipeline 6, thereby Since it is possible to prevent the pressure from being applied to the storage tank 4, it is not necessary to stop the powder supply device 2 when replenishing powder, and replenishment during operation is possible.
[0034]
Further, since the pressing means 36 is provided outside the case main body 28 of the powder feeder 8 with the adjusting means 36b and the display means 36c, the pressing force can be easily adjusted from the outside.
[0035]
(3) Simple supply means:
Since the pressurized air generating means 10 for flowing the pressurized air through the conveying pipe 6 can be used as it is as a means for sucking the powder, the powder supply device 2 including the replenishment pipe 12 for replenishing the powder is mounted on the base 18. As a single unit, it can be compactly and easily combined.
[0036]
As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications or corrections may be made within the scope of the present invention, for example, as described below. It is something that can be done.
[0037]
(1) Pressurized air generating means:
In the present embodiment, the blower 10 is used as the pressurized air generating means. However, the pressurized air generating means may be anything that can generate pressurized air, and may be a fan, for example. .
[0038]
(2) Switching means:
In the present embodiment, the switching valve 16 is used as the switching means 6 so that the air suction port 10a can be selectively switched to the storage tank 4 or the silencer 14 of the outside air introduction port. You may enable it to adjust the force which attracts | sucks a powder so that it may open to both the silencers 14 by arbitrary ratios.
[0039]
(3) Switching means:
In the present embodiment, the switching valve 16 is used as the switching means. However, this switching may be performed by detaching and recombining the connection of the pipe by a quick joint of the pipe without using the switching valve. .
[0040]
【The invention's effect】
According to the present invention, in a powder supply apparatus that measures and supplies a predetermined amount of powder in a storage tank, powder can be easily supplied to the storage tank, and the operation of the powder supply apparatus can be stopped. Provided is a powder supply method and a method for supplying powder to a storage tank, which can be performed, and is compact and simple.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of the configuration of a powder supply apparatus provided with powder replenishing means according to the present invention.
2 is an enlarged cross-sectional view of the rotary table portion of the powder feeder as viewed in the direction of arrows AA in FIG. 1 (corresponding to the cross section seen in the arrows AA-AA in FIG. 3).
3 is an enlarged cross-sectional view of the pressing means portion of the powder feeder as viewed in the direction of arrows BB in FIG. 1 (corresponding to the cross section seen in the direction of arrows BB-BB in FIG. 2).
[Explanation of symbols]
2: Powder supply device 4: Storage tank 6: Conveyance line 8: Powder supply machine 10: Blower (Pressurized air generating means)
10a: Air inlet 10b: Pressurized air outlet 12: Supply pipe 16: Switching valve (switching means)
26: Supply port 30: Weighing chamber 32: Rotary table 34: Ground plate (blocking member)
36: Pressing means 36b: Adjusting means

Claims (1)

A powder storage tank, a powder feeder that measures a predetermined amount of powder in the storage tank and supplies the powder to the transport pipe, an air suction port in the storage tank, and a pressurized air discharge port in the transport pipe Connected pressurized air generating means, a replenishment pipe connected to the storage tank for sucking and replenishing powder by the suction force of the pressurized air generating means, and the air suction port for introducing the storage tank or outside air Switching means for switching ,
The powder feeder includes a rotary table having a plurality of measurement chambers for introducing powder and supplying the powder to a supply port connected to the conveyance pipe, a closing member for closing the measurement chamber before and after the supply port, Pressing means for pressing the closing member toward the measuring chamber;
The measuring chamber is formed in a cylindrical hole shape, and the supply port is formed in a size surrounding the openings of the plurality of measuring chambers,
The powder supply apparatus provided with the powder replenishing means, characterized in that the pressing means includes an adjusting means capable of adjusting the magnitude of the pressing force .

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