JP2018070340A - Powder raw material supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply a powder raw material with efficiency both at large supply and at small supply.SOLUTION: A powder raw material supply device 1 comprises a container 2 receiving a powder raw material P and a screw feeder 3 provided at a lower part of the container 2, to delivers the powder raw material P in the container 2 toward a downstream with respect to a lateral transfer direction H by the screw feeder 3 and drop-supply it outward from an outlet 31e of the screw feeder 3. At an outward of the outlet 31e, a receiving part 4 capable of supporting a powder raw material P extends toward a downstream with respect to the transfer direction H. The receiving part 4 has a tip 4f capable of drop-supplying a powder raw material P at a large supply amount and an opening 4h provided upstream of the tip 4f with respect to the transfer direction H and capable of drop-supplying a powder raw material P at a small supply amount.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a powder raw material supply apparatus for supplying a powder raw material.

  As a powder raw material supply device for supplying a powder raw material, the powder raw material is sent to the downstream side in the horizontal transfer direction by the sending means provided at the lower part of the container containing the powder raw material, and the discharge port of the sending means And those that fall and supply from the outside.

  As the delivery means, a screw feeder is often used, and various improvements have been proposed so that a necessary amount of powder raw material can be accurately supplied. For example, the powder raw material supply apparatus disclosed in Patent Document 1 discloses that a discharge plate (dispensing port) of a screw feeder is provided with a weir plate that rises obliquely upward so as to block a part of the discharge port. . In this way, when the screw is rotated, the powder raw material is sent over the barrier plate, so that it is possible to prevent the powder raw material from flowing out to the supply destination after the screw is stopped.

JP-A-1-287794

  By the way, in the powder raw material supply apparatus, the required amount of the powder raw material is often changed. That is, there is a case where it is necessary to supply a large amount of powder raw material or a case where it is necessary to supply a small amount of powder raw material. However, the powder raw material supply apparatus disclosed in Patent Document 1 supplies only the powder raw material that has overcome the same dam plate when supplying a large amount of powder raw material or when supplying a small amount of powder raw material. Is done. For this reason, a large amount of powder raw material takes a short time to get over the barrier plate, whereas a small amount of powder raw material takes a long time to get over the barrier plate. Therefore, the supply efficiency when supplying a small amount of the powder raw material is very poor.

  This invention makes it a technical subject to supply a powder raw material efficiently both at the time of mass supply and at the time of small amount supply.

  The present invention, which has been devised to solve the above-mentioned problems, comprises a container containing a powder raw material and a delivery means provided at the lower part of the container, and the powder raw material in the container is horizontally transferred by the delivery means. In the powder raw material supply apparatus for feeding to the downstream side of the feed unit and dropping and feeding to the outside from the discharge port of the delivery means, the base end connected to the outside of the discharge port, and the tip separated from the base end to the downstream side in the transfer direction And a receiving part capable of supporting the powder raw material, the receiving part is a first part capable of dropping and supplying the powder raw material with a large supply amount, and an upstream side in the transfer direction of the first part And a second portion having an opening that can drop-feed the powder raw material with a small supply amount. According to such a configuration, when supplying a small amount of the powder raw material, the powder raw material can be dropped and supplied using only the second portion. On the other hand, at the time of mass supply of the powder raw material, the powder raw material can be dropped and supplied using the first part of the receiving part or the first part and the second part. Thus, since the supply position of the powder raw material can be changed according to the supply amount of the powder raw material, the powder raw material can be efficiently supplied both when supplying a large amount and when supplying a small amount.

  In the above configuration, the first portion may be a tip portion of the receiving portion. In this way, a large amount of powder raw material can be easily dropped and supplied from the tip of the receiving part without separately providing an opening or the like larger than the second part in the receiving part.

  In the above configuration, it is preferable that the second portion includes an elongated opening portion along the transfer direction or a plurality of openings provided at intervals along the transfer direction. If it does in this way, it will become easy to adjust the quantity of the powder raw material to drop and supply from the 2nd part.

  Said structure WHEREIN: It is preferable that the base end part side area | region containing the base end part of a receiving part is a continuous area | region without an opening part. In this way, since the powder raw material that has come out from the discharge port temporarily accumulates in the base end side region of the receiving portion, even if the powder raw material flows out from the discharge port after the delivery means is stopped, Excess powder raw material can be received in the base end side region. Therefore, it is possible to prevent the powder raw material from being supplied excessively.

  Said structure WHEREIN: It is preferable that the 2nd part is formed in the width direction center part of a receiving part. If it does in this way, it will become easy to supply a powder raw material stably through the 2nd part.

  In this case, it is preferable that the receiving portion has a high level at both ends in the width direction and a low level at the center in the width direction, and gradually moves downward from each of the both ends in the width direction toward the center in the width direction. In this way, since the powder raw material is collected at the center in the width direction by gravity, the powder raw material can be supplied more stably through the second portion.

  In the above-described configuration, the delivery means defines a transfer space for the powder raw material, and is disposed in the cylindrical transfer pipe having the discharge port at the downstream end in the transfer direction, and the rotation operation. And a screw for feeding the powder raw material to the downstream side in the transfer direction.

  In this case, it is preferable that the receiving portion is a cylindrical or partial cylindrical member that matches the shape of the discharge port of the transfer pipe, and is disposed coaxially with the transfer pipe. In this way, a resistor such as a step that obstructs the transfer of the powder raw material is not formed between the transfer pipe and the receiving portion, and the powder raw material can be smoothly fed onto the receiving portion. In addition, since the powder raw material is sent out smoothly, solidification due to excessive compression of the powder raw material and overload on the screw can be prevented.

  In the above configuration, the receiving part is preferably detachable. If it does in this way, when the kind of powder raw material changes, it can replace with the receiving part according to the characteristic of the powder raw material. In this case, for example, it is conceivable to replace the second portion (opening) with a receiving portion having a different size or shape.

  According to the present invention as described above, the powder raw material can be efficiently supplied both when supplying a large amount and when supplying a small amount.

It is sectional drawing which shows a powder raw material supply apparatus. (A) is a top view which shows a receiving part, (b) is AA sectional drawing of (a). (A) is an expanded sectional view which shows the state around the discharge port of the powder raw material supply apparatus at the time of mass supply, (b) shows the state around the discharge port of the powder raw material supply apparatus at the time of small amount supply. It is an expanded sectional view. (A)-(e) is a top view which shows the modification of a receiving part. (A) And (b) is sectional drawing which shows the modification of a receiving part.

  Hereinafter, an embodiment of a powder raw material supply apparatus according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the powder raw material supply apparatus 1 according to this embodiment includes a container 2, a screw feeder 3 as a delivery unit, and a receiving part 4.

  The container 2 is composed of a silo or the like, and contains a powder raw material P such as a glass raw material therein. A stirring mechanism (not shown) such as a gear may be arranged inside the container 2.

  The screw feeder 3 is provided in the lower part of the container 2. The screw feeder 3 includes a cylindrical transfer pipe 31 that partitions and forms a transfer space for the powder raw material P, and a screw 32 disposed inside the transfer pipe 31.

  The transfer pipe 31 is a cylindrical body. The transfer pipe 31 is disposed so that the central axis is in the horizontal direction (preferably horizontal). An inlet 31i through which the powder raw material P in the container 2 flows is provided at an upper portion of one end (the side opposite to the discharge port 31e) of the transfer pipe 31, and the powder raw material P is provided at the other end of the transfer pipe 31. Is provided with a discharge port 31e. In this embodiment, the discharge port 31 e is circular according to the shape of the transfer pipe 31. The transfer tube 31 may be an elliptic cylinder or a square cylinder.

  The screw 32 feeds the powder raw material P to the downstream side in the transfer direction H in the horizontal direction (preferably in the horizontal direction) by the rotation operation in the R direction. The shaft portion of the screw 32 extends from one end portion of the transfer pipe 31 to the outside of the transfer pipe 31 via a bearing or the like, and is connected to a motor 33 as a drive unit. The motor 33 can rotate the screw 32 at a high speed when supplying a large amount of the powder material P, and can rotate the screw 32 at a low speed when supplying a small amount of the powder material P.

  The receiving part 4 is a plate-like body, and has a base end part 4b connected to the outside of the discharge port 31e and a front end part 4f separated from the base end part 4b to the downstream side in the transfer direction H. In this embodiment, the receiving portion 4 is detachable from the discharge port 31e. The attachment / detachment mechanism of the receiving portion 4 is not particularly limited, and for example, the following configuration can be adopted. That is, the attaching / detaching mechanism includes a convex portion (or a concave portion) provided in the receiving portion 4 and a concave portion (or a convex portion) provided in the transfer pipe 31 and fitted to the convex portion (or concave portion) of the receiving portion 4. It may be provided. Further, the attaching / detaching mechanism may fix the receiving portion 4 to the transfer pipe 31 with a fastening member such as a screw.

  The receiving part 4 supports the powder raw material P sent from the discharge port 31e by the screw feeder 3 from below, and drops and supplies the powder raw material P along the V direction at a predetermined position.

  In this embodiment, one end portion of a tubular cap 5 bent at a substantially right angle is detachably attached to the outer peripheral portion of the other end portion (on the discharge port 31 e side) of the transfer pipe 31. The receiving part 4 is accommodated in the internal space of the cap 5. There is a sufficient gap 6 between the tip portion 4 f of the receiving portion 4 and the inner wall of the cap 5. The other end of the cap 5 is opened downward, and serves as a dropping port 5e for the powder material P. The cap 5 prevents dust from being scattered, but may be omitted. Moreover, the cap 5 may be integrated with the transfer pipe 31 so as not to be detachable. In this case, an opening portion used for replacing the receiving portion 4 and observing the inside of the cap 5 is provided at a portion corresponding to the upper position of the receiving portion 5 of the cap 5, and a lid portion for opening and closing the opening portion is provided. It is preferable.

  In this embodiment, a measuring instrument 7 for measuring the powder raw material P is provided below the drop opening 5 e of the cap 5. The powder raw material P dropped from the receiving part 4 is supplied to the measuring instrument 7 through the drop port 5 e of the cap 5.

  When the powder raw material P is weighed to a predetermined amount smaller than the required amount, the measuring device 7 transmits a control signal to the motor 33 by wire or wirelessly, and the rotation speed of the screw 32 by the motor 33 is changed from high speed to low speed. Is done. Further, when the powder raw material P is weighed to a necessary amount, the measuring device 7 transmits a stop signal to the motor 33 by wire or wirelessly, and the rotation of the screw 32 by the motor 33 is stopped. Further, after the required amount of the powder material P is weighed, the measuring device 7 supplies the weighed powder material P to a packing container (not shown). The operator may manually change the rotational speed of the screw 32 by the motor 33 based on the measurement result of the measuring instrument 7.

  As shown in FIG. 2 (a), the receiving portion 4 includes a tip portion 4f as a first portion capable of dropping and supplying the powder raw material P at a first supply amount (large supply amount) per unit time, An opening as a second part capable of dropping and supplying the powder raw material P at a second supply amount (small supply amount) smaller than the first supply amount per unit time on the upstream side in the transfer direction H of the part 4f 4h. The opening area of the gap 6 formed between the front end part 4f and the inner wall surface of the cap 5 is larger than the opening area of the opening part 4h. The size and shape of the opening 4h and the size of the gap 6 can be appropriately changed depending on the characteristics of the powder raw material P (for example, particle size, fluidity (rest angle), etc.).

  The opening 4 h has an elongated slit shape (in the illustrated example, a rectangular slit) along the transfer direction H, and is provided at the center in the width direction of the receiving portion 4. Here, the width direction is a direction orthogonal to the transfer direction H in the horizontal plane.

  The projected area of the receiving part 4 on the horizontal plane is preferably 30% or more and 90% or less of the opening area of the drop port 5e.

  The opening area of the opening 4h is preferably 5% or more and 50% or less of the entire area of the receiving part 4 (including the opening 4h).

  The opening 4h extends to the distal end 4f and opens toward the downstream side in the transfer direction H at the distal end 4f, but does not extend to the proximal end 4b. A distal end side region 4fx including the distal end portion 4f on both sides in the width direction of the opening 4h, and a proximal end side region including the proximal end portion 4b of the receiving portion 4 (region hatched in FIG. 2A) 4bx , A continuous region without an opening. The powder raw material P is not dropped and supplied in the distal end portion side region 4fx and the proximal end portion side region 4bx. Note that the opening 4h may extend to the base end 4b.

  As shown in FIG. 2B, the receiving part 4 is a partial cylindrical body that matches the shape of the discharge port 31 e of the cylindrical transfer pipe 31. That is, the distal end side region 4fx and the proximal end side region 4bx on both sides in the width direction of the opening 4h are partial cylindrical bodies. With this shape, the receiving portion 4 has a high end at the width direction and a low position at the center portion in the width direction, and gradually moves downward from each of the both end portions in the width direction toward the center portion in the width direction. Due to the inclination and gravity of the receiving portion 4, the powder raw material P is collected in the opening 4 h formed in the central portion in the width direction. Note that the receiving portion 4 may be a partial elliptic cylinder.

  Returning to FIG. 1 again, the receiving part 4 is arranged coaxially with the transfer pipe 31, and the transfer pipe 31 and the receiving part 4 are smoothly continuous in the transfer direction H. Therefore, the powder raw material P sent out from the discharge port 31 e of the transfer pipe 31 does not receive a large resistance from the receiving part 4 when transferring onto the receiving part 4. The receiving part 4 may be attached at a position lower than the discharge port 31e of the transfer pipe 31. Further, the receiving part 4 may be attached to be inclined with respect to the transfer pipe 31.

  In this embodiment, there is no gap between both end portions in the width direction of the receiving portion 4 and the inner wall surface of the cap 5, and the powder raw material P is not dropped and supplied from both sides in the width direction of the receiving portion 4. There may be a gap between the widthwise ends of the receiving portion 4 and the inner wall surface of the cap 5.

  Next, the operation of the powder raw material supply apparatus 1 configured as described above will be described. In the following, in order to accurately supply the required amount of powder raw material P in a short time, an example is given in which a large amount of powder raw material P is initially supplied and switched to a small amount supply before reaching the required amount. I will explain to you. In addition, when the required amount of the powder raw material P is large, all of the necessary amount may be supplied only by mass supply. When the required amount of the powder raw material P is small, all of the necessary amount is small. You may supply only by supply.

  As shown in FIG. 3A, a large amount of the powder raw material P is initially supplied. When the powder raw material P is supplied in large quantities, the screw 32 is rotated at a high speed. Then, a large amount of the powder raw material P is sent out to the downstream side in the transfer direction H from the discharge port 31e of the transfer pipe 31 at a relatively high transfer speed. The delivered powder raw material P is transferred to the receiving portion 4 and transferred to the downstream side in the transfer direction H on the receiving portion 4. Since a large amount of the powder raw material P is supplied onto the receiving portion 4, most of the powder raw material P passes over the opening 4h and reaches the tip portion 4f. Since the opening area of the gap 6 between the tip portion 4f and the cap 5 is large, a large amount of the powder raw material P is supplied from the tip portion 4f. At this time, the powder raw material P may be dropped and supplied from the opening 4h.

  Next, as shown in FIG. 3B, the powder raw material P is switched to a small amount supply before reaching the required amount (preferably immediately before). When supplying a small amount of the powder raw material P, the screw 32 is rotated at a low speed. Then, a small amount of the powder raw material P is sent out from the discharge port 31e of the transfer pipe 31 to the downstream side in the transfer direction H at a relatively low transfer speed. The delivered powder raw material P is transferred to the receiving portion 4 and transferred to the downstream side in the transfer direction H on the receiving portion 4. Since a small amount of the powder raw material P is supplied onto the receiving portion 4, most of the powder raw material P does not get over the opening 4h. Since the opening area of the opening 4h is small, a small amount of the powder raw material P is dropped and supplied from the opening 4h. In this embodiment, the opening 4h is a long and narrow slit along the transfer direction H. Therefore, as the rotational speed of the screw 32 is increased, the drop supply position of the powder raw material P spreads toward the tip 4f, As the rotational speed of the screw 32 is decreased, the dropping supply position of the powder raw material P is narrowed toward the base end portion 4b. Therefore, the supply amount of the powder raw material P from the opening 4 h can be finely adjusted by the rotational speed of the screw 32.

  As described above, according to the powder raw material supply apparatus 1, when the powder raw material P is supplied in large quantities, the powder raw material P is supplied by dropping from the front end portion 4f (or the front end portion 4f and the opening portion 4h) of the receiving portion 4. When the small amount of the powder raw material P is supplied, the powder raw material P can be dropped and supplied from the opening 4 h of the receiving portion 4. Therefore, since the supply position of the powder raw material P can be changed according to the supply amount of the powder raw material P, the powder raw material P can be efficiently dropped and supplied both at the time of mass supply and at the time of small amount supply.

  In addition, even if the powder material P flows out from the discharge port 31e of the transfer pipe 31 after the required amount of the powder material P is measured by the measuring instrument 7 and the rotation of the screw 32 is stopped, the flow-out powder material P P can be received by the base end side region 4bx of the receiving portion 4. Accordingly, it is possible to prevent a situation in which the powder raw material P that has flowed out of the discharge port 31e of the transfer pipe 31 is supplied to the measuring device 7 and the measurement is over.

  In addition, this invention is not limited to the structure of the said embodiment, It is not limited to an above-described effect. The present invention can be variously modified without departing from the gist of the present invention.

  In the above embodiment, the receiving part 4 having the opening 4h having the shape shown in FIG. 2A has been described, but the shape of the opening 4h is not limited to this. The opening 4h of the receiving part 4 may have a shape as shown in FIGS. The opening 4h of the receiving portion 4 shown in FIG. 4A has a rectangular shape whose width direction dimension is larger than that in the case of FIG. The opening 4h of the receiving part 4 shown in FIG. 4 (b) has an elongated slit shape extending along the transfer direction H, and a plurality (two in the illustrated example) are arranged in parallel in the width direction. The opening 4h of the receiving part 4 shown in FIG. 4C has a triangular shape whose width direction dimension gradually increases from the base end part 4b side toward the tip end part 4f side. The opening 4h of the receiving part 4 shown in FIG. 4D is formed from a plurality of holes (two circular holes and one semicircular hole in the illustrated example) provided at intervals along the transfer direction H. Become. The receiving part 4 shown in FIG. 4 (e) is an elongated slit-like opening part 4h extending along the transfer direction H, and the receiving part 4 is located on the downstream side of the opening part 4h in the transfer direction H. And an opening 4hx having a large opening area formed over the entire width. In this case, the first portion (large supply amount portion) is not the tip portion 4f but the opening portion 4hx, and the second portion (small supply amount portion) is the opening portion 4h.

  In the above embodiment, the receiving portion 4 made of the partial cylindrical body shown in FIG. 2A has been described, but the shape of the receiving portion 4 is not limited to this. As shown in FIG. 5A, the receiving portion 4 may be a V-shaped body having a distal end portion side region 4fx and a proximal end portion side region 4bx formed of an inclined plane. Moreover, as shown in FIG.5 (b), the receiving part 4 may be a cylindrical body (or elliptical cylinder). Furthermore, although illustration is abbreviate | omitted, the receiving part 4 may be a plane part (preferably horizontal plane part) extended along the transfer direction H.

  In the above embodiment, the screw feeder 3 has been described as the delivery unit, but the delivery unit is not limited to this. The delivery means may be a vibration feeder that sends the powder raw material P downstream in the transfer direction H by applying vibration to the transfer pipe 31.

DESCRIPTION OF SYMBOLS 1 Powder raw material supply apparatus 2 Container 3 Screw feeder 4 Receiving part 4b Base end part 4f Tip part (1st part)
4h opening (second part)
4bx Base end side region 5 Cap 5e Drop port 6 Meter 31 Transfer pipe 31i Input port 31e Discharge port 32 Screw 33 Motor H Transfer direction P Powder raw material

Claims (9)

A container containing a powder raw material; and a delivery means provided at a lower portion of the container. The powder raw material in the container is sent to the downstream side in the lateral transfer direction by the delivery means, and the discharge means is discharged. In the powder raw material supply device that drops and supplies from the outlet to the outside,
A base end portion connected to the outside of the discharge port; and a tip end portion separated from the base end portion in the downstream direction of the transfer direction, and a receiving portion capable of supporting the powder raw material,
The receiving part is provided on the upstream side in the transport direction of the first part, the first part capable of dropping and supplying the powder raw material with a large supply amount, and the powder raw material is dropped with a small supply amount A powder raw material supply apparatus, comprising: a second portion including a supplyable opening.   The powder raw material supply apparatus according to claim 1, wherein the first portion is the tip portion of the receiving portion.   3. The powder according to claim 1, wherein the second portion includes an elongated opening along the transfer direction or a plurality of openings provided at intervals along the transfer direction. Body material supply device.   The powder raw material supply apparatus according to any one of claims 1 to 3, wherein the base end portion side region including the base end portion of the receiving portion is a continuous region having no opening.   The powder raw material supply apparatus according to any one of claims 1 to 4, wherein the second portion is formed in a central portion in the width direction of the receiving portion.   The receiving portion is configured such that both end portions in the width direction are high and the center portion in the width direction is low, and gradually shifts downward from each of the both end portions in the width direction toward the center portion in the width direction. Item 6. The powder raw material supply apparatus according to Item 5.   The delivery means defines a transfer space for the powder raw material, and is disposed in a cylindrical transfer pipe having the discharge port at an end on the downstream side in the transfer direction, and disposed inside the transfer pipe. The powder raw material supply apparatus according to claim 1, further comprising: a screw that feeds the powder raw material to the downstream side in the transfer direction.   The said receiving part is a cylindrical or partial cylindrical member that matches the shape of the discharge port of the transfer pipe, and is disposed coaxially with the transfer pipe. The powder raw material supply apparatus as described. The powder raw material supply apparatus according to any one of claims 1 to 8, wherein the receiving portion is detachable.

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