JP4258223B2 - Quantitative powder supply equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a powder and particle quantitative supply device, and more specifically, between two rotating rolls provided between a pair of side walls, a granular material is introduced from above and the two rotating rolls are rotated. By this, it is related with the apparatus which supplies this granular material quantitatively to the downward direction of a roll.
[0002]
[Prior art]
As shown in FIG. 5, a quantitative supply device (1 ′) for a granular material provided with two rotating rolls (31, 32) between a pair of side walls (21, 22) is widely used (Patent Literature). 1). In the powder and substance quantitative supply device (1 ′), the pair of side walls (21, 22) are parallel to each other. Further, the two rotary rolls (31, 32) are arranged at a predetermined interval, and rotate around the rotation axis in the same direction as the normal line of the side walls (21, 22). While putting the granular material (4) between the two rotating rolls (31, 32) from above, sandwiching the granular material (4) between the two rotating rolls (31, 32) By rotating the two rotating rolls so as to be sent downward, the granular material (4) can be quantitatively supplied downward. Usually, nothing is provided on the side walls (21, 22) of such a quantitative supply device (1 ′) so as not to hinder the flow of the granular material (4) charged from above.
[0003]
However, in such a conventional quantitative powder feeder (1 ′), while supplying the powder (4), most of the charged powder (4) is supplied to the rotating rolls (31, 32). In some cases, the particles were deposited on the surface, which hindered the flow of the particles (4), and the particles could not be continuously supplied downward.
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 06-343886
[Problems to be solved by the invention]
Therefore, the present inventor has eagerly studied to develop a quantitative supply device that can continuously and quantitatively supply powder particles below the rotary roll. And a pressing member that presses the granular material deposited on the side wall from above, and the granular material deposited on the side wall between the rotating rolls is moved upward by the pressing member. It has been found that the powder supply can be continuously supplied to the lower side of the rotary roll by configuring the fixed amount supply device so as to be pressed intermittently.
[0006]
[Means for Solving the Problems]
That is, according to the present invention, two rotating rolls (31, 32) are rotated between a pair of parallel side walls (21, 22) with a rotation axis in the same direction as the normal line of the side walls (21, 22) as a rotation center. ) Are provided at predetermined intervals,
The granular material (4) is introduced from above between the two rotating rolls (31, 32), and the granular material (4) is sandwiched between the two rotating rolls (31, 32). The two rotating rolls (31, 32) are rotated so as to be sent downward, and the powder (4) is quantitatively supplied below the rotating roll (1),
On the upper side of the two rotating rolls (31, 32) on the side wall side, the pressing member presses the granular material (4a) deposited on the side wall on the two rotating rolls (31, 32) from above. Members (51, 52) are provided,
The pressing member (51, 52) is configured to intermittently press the granular material (4a) deposited on the side wall on the two rotating rolls from above. Provided is a powder and substance quantitative supply device (1). 1 to 4 schematically show examples of the powder and granular material supply device of the present invention.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
As shown in the front view of FIG. 1 and the top view of FIG. 3, the powder and substance quantitative supply device (1) of the present invention includes a pair of side walls (21, 22). Such side walls (21, 22) may be, for example, side walls constituting a roll box (2) that supports the rotating rolls (31, 32). The side walls constituting the roll box are usually provided so as to surround the four sides of the rotary rolls (31, 32) in order to prevent the powder particles (4) from scattering to the outside. 1 and 3, the pair of side walls (21, 22) are parallel to each other.
[0008]
Two rotating rolls (31, 32) are provided between the pair of side walls (21, 22). The rotation axis of the rotary rolls (31, 32) is in the same direction as the normal line of the pair of side walls (21, 22), and the rotary rolls (31, 32) rotate around the rotation axis. The two rotating rolls (31, 32) are arranged at a predetermined interval. This interval may be approximately equal to or larger than the maximum particle diameter of the charged granular material, set smaller than the maximum particle diameter of the charged granular material (4), and rotated by a rotating roll. You may come to supply below, crushing a granular material. As shown in the side views of FIGS. 2 and 4, the two rotating rolls (31, 32) are usually provided in the same horizontal plane.
[0009]
The two rotating rolls (31, 32) may be cylindrical rotating rolls having smooth surfaces, but may also be so-called biting rolls having irregularities on the surfaces. By using the biting roll, the granular material (4) can be more reliably supplied downward.
[0010]
In the fixed quantity supply device (1) of the present invention, the granular material (4) is introduced between the two rotating rolls (31, 32) from above. The powder (4) may be, for example, a non-adhesive powder in a dry state where the powder itself is not sticky and difficult to stick to each other. It may be a wet state containing the particles, or the granular material itself may be sticky, and the adhesive particles may be in a state of being easily fixed to each other. Even if the fixed quantity supply device (1) of the present invention is an adhering powder, it can be continuously supplied below the rotary rolls (31, 32). It is preferably used when it is an ionic powder fluid.
[0011]
Examples of the powder (4) include ceramic powders such as ceramic raw materials, incinerator ash, incinerator ash, powdered fertilizer, powdered feed, powdered solid fuel, earth and sand, clay, powdered catalyst and its raw materials Examples thereof include powder or intermediate powder, cement, powdered rubber, powdered resin, wood chip, wheat flour, starch powder, and cellulose powder.
[0012]
In the powder and granular supply device (1) of the present invention, the powder and granule (4) is introduced between the rotating rolls (31 and 32). In order to put the granular material (4) between the rotating rolls (31, 32), for example, the granular material (4) is dropped from the hopper (6) or the like toward the rotating rolls (31, 32). Just do it.
[0013]
While putting a granular material (4) between rotary rolls (31, 32), a rotary roll (31, 32) is rotated. As shown in the side view of FIG. 2, the rotating rolls (31, 32) are rotated so as to be sent downward while sandwiching the granular material (4) put therebetween, so that the rotating rolls (31, 32) The granular material (4) thrown in between is sandwiched between the rotating rolls (31, 32) and sent below the rotating rolls (31, 32). If the peripheral speeds of the rotating rolls (31, 32) are different, stress is applied to the powdered fluid (4) supplied between the rotating rolls and they may be crushed. The In order to rotate the rotating rolls at the same peripheral speed, for example, rotating rolls (31, 32) having the same diameter are used, and a reduction gear (not shown) having the same gear ratio is used from one rotary driving device (not shown). What is necessary is just to decelerate and rotate. The amount of powder supplied to the lower part of the granular material (4) is an amount commensurate with the rotational speed of the rotating rolls (31, 32), and by rotating the rotating rolls (31, 32) at a constant rotational speed, The granules (4) can be quantitatively supplied downward, and the higher the rotational speed of the rotary roll, the more powder (4) can be supplied downward.
[0014]
The powder and substance quantitative supply device (1) of the present invention is provided with a pressing member (51, 52) on the side wall (21, 22) side of the rotary roll (31, 32). The pressing members (51, 52) respectively press the powder particles (4a) deposited on the side walls of the rotary rolls (31, 32) from above. As shown in the side views of FIGS. 2 and 4, the shape of the pressing member (5) is such that the lower shape is a shape along the cross-sectional shape of the two rotating rolls. It is preferable in that the granules (4a) can be pressed evenly. The pressing members (51, 52) are usually provided on the side walls of the rotary roll.
[0015]
Such pressing members (51, 52) press the powder particles (4a) deposited on the side walls of the two rotating rolls (31, 32) from above the rotating rolls. In order to press the granular material (4a) from above with the pressing member (51, 52), for example, the pressing member (51, 52) may be lowered parallel to the side wall. The pressing members (51, 52) can be lowered along the side wall by being driven linearly by, for example, an air cylinder. By lowering and pressing the pressing member (51, 52), the granular material (4a) deposited on the side wall of the rotating roll is pushed between the rotating rolls and supplied downward by the rotation of the rotating roll. The In the pressing operation, the two pressing members (51, 52) may be lowered at the same time, or may be lowered and pressed independently.
[0016]
The pressing member (51, 52) is preferably configured to press the granular material (4a) deposited on the side wall side while sliding on the surface of the side wall (21, 22). If the granular material (4) adheres to the surface of the side wall (21, 22), more granular material will accumulate on the side of the side wall on the rotating roll, but the pressing member (51, 52) By sliding the surface of the side wall (21, 22), it is possible to rub off the powder adhering to the surface of the side wall, and to reduce the accumulation of powder on the side wall side of the rotating roll Can do. The powdered particles are fed downward from between the rotating rolls.
[0017]
The pressing by the pressing members (51, 52) is performed intermittently. If the pressing member (51, 52) is always pressed continuously, the charged powder particles (4) accumulate around the pressing member (51, 52) on the rotating roll. Supply of the granular material to the downward direction of a rotating roll comes to be prevented by the granular material. In order to hold down intermittently, for example, after lowering the pressing member (51, 52) and pressing the powder (4a), raise the pressing member (51, 52), and then press the pressing member again. (51, 52) may be lowered. The raising and lowering may be performed automatically using a linear drive device (not shown) such as an air cylinder. The time until the presser member (51, 52) is raised after the powder body (4a) is pressed down is the supply amount of the powder body (4), the rotation of the rotating rolls (31, 32) For example, it may be about 0.5 seconds to 10 seconds, although it depends on the speed. Further, the time period from the rise to the fall again is, for example, about 5 seconds to 10 minutes, although it varies depending on the supply amount of the powder (4), the rotation speed of the rotary rolls (31, 32), and the like.
[0018]
Under the rotating rolls (31, 32) of the quantitative supply device (1) of the present invention, for example, if an extruder is disposed, the powder (4) continuously and quantitatively in the extruder. Can be supplied. As the extrusion molding machine, for example, a machine equipped with a screw feeder and a die can be used, and the granular material (4) is quantitatively supplied to the screw feeder. The screw feeder is used, for example, to feed the granular material to a die for extruding the granular material (4).
[0019]
【The invention's effect】
According to the quantitative supply device of the granular material of the present invention, since many granular materials are not deposited on the rotating roll, the granular material can be supplied quantitatively continuously below the rotating roll. it can.
[0020]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited by this Example.
[0021]
Example 1
1 to 3, two rotating rolls (31, 32) are provided between a pair of opposing side walls (21, 22) of a roll box (2) using a quantitative supply device (1) of granular material as shown in FIGS. Are arranged in parallel with each other and spaced apart, and while rotating the rotating roll, the granular material (4) is intermittently dropped from the upper hopper (6) at about 0.5 kg / min between the rotating rolls. And put it in. As the powder (4), particles of an inorganic compound containing about 10% of water by mass fraction (primary particle size is 0.1 to 10 μm) were used. While the granular material (4) was charged, the pressing members (51, 52) provided at both ends of the rotating roll were lowered to press the granular material (4a) deposited on the rotating roll for about 3 seconds. Thereafter, the operation of raising and lowering again after about 60 seconds was repeated. Even after 24 hours of operation, the powder (4) was continuously supplied below the rotary roll.
[0022]
Comparative Example 1
The operation was performed in the same manner as in Example 1 except that the holding member (5) was operated while being held in the raised state without being operated. After 30 minutes, the rotary member (31, 32) The powder (4) was not supplied.
[Brief description of the drawings]
FIG. 1 is a front view schematically showing an example of a powder and substance quantitative supply device of the present invention.
FIG. 2 is a side view schematically showing an example of a powder and substance quantitative supply device of the present invention.
FIG. 3 is a top view schematically showing an example of a powder and substance quantitative supply device of the present invention.
FIG. 4 is a front view schematically showing an example of a conventional quantitative supply apparatus for powder particles.
FIG. 5 is a side view schematically showing an example of a conventional quantitative supply apparatus for powder particles.
[Explanation of symbols]
1: Quantitative powder feeder 1 ': Conventional powder feeder 2: Roll box 21, 22: Side wall
31, 32: Rotating roll 4: Powder particles 4a: Accumulated powder particles
51, 52: Presser member 6: Hopper

Claims (3)

Between a pair of parallel side walls, two rotary rolls rotating around a rotation axis in the same direction as the normal line of the side walls are provided at a predetermined interval, and between the two rotary rolls. The powder particles are charged from above, and the two rotating rolls are rotated so as to send the powder particles downward while being sandwiched between the two rotating rolls. A pressing member that presses the granular material deposited on the side wall of the two rotary rolls from above, on the side wall side upper parts of the two rotary rolls. is provided, after pressing the granular material deposited on the side wall on the lowers the pressing member and the two rotating rolls, is raised, by repeating an operation of lowering again, the pressing By the attaching member, the rotating roll Dispensing device granular material, characterized in that is configured to intermittently press the granular material deposited on the side wall of the upper from above. 2. The quantitative supply device according to claim 1, wherein the pressing member is configured to press the granular material deposited on the side wall on the rotary roll while sliding on the surface of the side wall. The quantitative supply device according to claim 1, wherein the powder is a sticky powder.

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