JP2016077948A - Minimal substance recovery device and powder and grain supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively use the whole of a filter.SOLUTION: A powder and grain recovery device includes: a casing 103 which has an entry pipe 101 in which gas F1 including powder and grain enters and a gas outflow port; a filter body 120 which covers the gas outflow port in the casing 103; and a filter protection cylinder 130 which is provided in the casing 103 in a state that the filter protection cylinder is separated from the filter body 120 and stores the filter body 120 and has an opened lower end section 120c. Since gas including a minimal substance enters the casing from the entry pipe 101 and passes the filter body 120 while flowing out of the gas outflow port, the minimal substance is separated from the gas and is recovered. The minimal substance recovery device is capable of enhancing a recovery ratio of the minimal substance per unit area of the filter because the gas including the minimal substance passes the whole of the filter body.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a minimal material collection device that collects extremely small materials such as powder particles, cutting powder, and dust, and a powder material supply system that includes this minimal material collection device.

  Conventionally, pharmaceuticals, foodstuffs, and the like include powdery and granular powders. The granular material is often handled by being packed in a storage body such as a bag or a container by a granular material supply device. However, when the granular material supply device supplies the granular material to the container, the granular material soars in the container, leaks to the outside of the container, or the operator mishandles the granular material. In some cases, powder particles are scattered on the floor. For this reason, there is a granular material collection device that collects the granular material that has risen and the granular material that has scattered on the floor. In addition, there is a dust collector that collects cutting powder generated during metal cutting and dust in a building in a factory. Some of these minimal substance recovery devices such as a granular material recovery device and a dust collector include a filter for recovering a minimal material such as a granular material, cutting powder, and dust.

  In the granular material collection device as a minimal material collection device, there is one that collects the granular material by passing a gas containing the granular material through a plurality of filters (Patent Document 1). .

JP 2014-508221 A

  However, since the granular material collection device as the conventional minimal material collection device passes the gas containing the granular material through a plurality of filters, the area of the filter through which the gas containing the granular material first passes is large. There is a problem that it is small and the recovery rate of the granular material per unit area of the filter is low.

  Moreover, when the collection rate of the granular material per unit area of the filter is low, there is a problem that the granular material supply system that combines the granular material recovery device and the granular material supply device has low operating efficiency.

  The present invention effectively uses the entire filter to increase the recovery rate of the minimum substance per unit area of the filter, and the powder provided with the minimum material recovery apparatus and the granular material supply device It is to provide a granule supply system.

  The minimal substance recovery device of the present invention includes a casing having an inlet and a gas outlet through which a gas containing a minimal substance enters, a filter body covering the gas outlet in the casing, and spaced apart from the filter body. And the filter protection cylinder which was provided in the said casing and the lower end part was open | released in the state which accommodated the said filter body, It was characterized by the above-mentioned.

  The granular material supply system according to the present invention includes a granular material supply device that supplies granular material to the storage body, and sucks the gas floating in the storage body, including the granular material, And a minimal substance recovery device that separates and recovers from the gas, and the minimal substance recovery device is the above-described minimal substance recovery device.

  In the minimal substance recovery device of the present invention, a gas containing a minimal substance enters the casing from the entrance and passes through the filter while flowing out from the gas outlet, and separates and collects the minimal substance from the gas. For this reason, since the gas containing the minimal substance passes through the entire filter body, the minimal substance recovery device of the present invention can increase the recovery rate of the minimal substance per unit area of the filter and increase the size. Can be prevented.

  In the minimal substance recovery device of the present invention, the filter body is accommodated in the filter protection cylinder, so that the minimal substance contained in the gas entering from the entrance is prevented from directly hitting the filter body. Since clogging is reduced to prevent damage, it can be used for a long time.

  The granular material supply system of the present invention includes a minimal material recovery device that effectively uses the entire filter and increases the recovery rate of the minimal material per unit area of the filter. it can.

It is a figure of a granular material supply system provided with the granular material supply apparatus and the granular material collection | recovery apparatus as a minimal substance collection | recovery apparatus of embodiment of this invention. It is an external view of the granular material collection | recovery apparatus as a minimal substance collection | recovery apparatus of embodiment of this invention, and is the figure which abbreviate | omitted the gas suction apparatus. It is the longitudinal cross-sectional schematic of FIG. It is AA arrow sectional drawing of FIG. It is an expanded sectional view of the filter body of FIG. It is BB arrow sectional drawing of FIG. It is an expanded sectional view of the filter body of a form different from FIG. It is CC sectional view taken on the line of FIG. FIG. 5 is an enlarged cross-sectional view of a filter body of a different form from FIG. 4. It is DD sectional view taken on the line of FIG.

  Hereinafter, a granular material recovery device as a minimal material recovery device according to an embodiment of the present invention, and a granular material supply system including the granular material recovery device and the granular material supply device will be described with reference to the drawings. To do.

  FIG. 1 is a diagram of a granular material supply system 1 including a granular material supply device 11 and a granular material recovery device 100 as a minimal material recovery device according to an embodiment of the present invention.

  The granular material supply device 11 is a device that supplies or fills the granular material to the storage bag S as a storage body. Examples of the powder particles include cereal powders such as wheat flour and nonfat dry milk, and image forming toner containing a magnetic material for a copying machine. A container as a storage body may be used instead of the storage bag. Therefore, what supplies a granular material is not limited to a storage bag.

  The granular material supply device 11 is erected on the fixed member 12. On a support column 13 erected on the fixed member 12, an elevating shaft 14 is provided so as to be movable up and down. When the handle 15 is rotated, the elevating shaft 14 elevates the column 13 by an elevating mechanism (not shown).

  The elevating shaft 14 is provided with a hopper 17 and a cylindrical guide tube 18 through a bracket 16. The hopper 17 stores powder particles. A motor (not shown) that rotates an auger (also called a screw) 19 and a cover 20 that houses the motor are provided at the upper end portion of the elevating shaft 14.

  The auger 19 includes a rotating shaft 21 that rotates while being positioned in the guide tube 18, and a blade 22 that is provided on the rotating shaft 21 and rotates in the guide tube 18 by the rotation of the rotating shaft 21 to convey the granular material. Is formed. The blades 22 are formed in a circular shape when viewed from the end of the rotating shaft 21. The rotating shaft 21 is rotatably supported by the hopper 17 and the cover 20. The rotating shaft 21 extends through the cover 20 and the hopper 17 to the vicinity of the powder outlet 18a of the guide cylinder 18.

A nitrogen supply path (gas) for guiding nitrogen gas (inert gas) N ₂ supplied by a nitrogen gas supply device (gas supply unit) 27 from the upper end to the substantially lower end of the rotary shaft 21 is provided at the axis of the rotary shaft 21. Guideway) 23 is formed. In the nitrogen supply path 23, a plurality of nitrogen outlets (gas supply ports) 26 are formed radially around the nitrogen supply path 23 and are formed along the axial direction of the rotating shaft 21. The nitrogen jet port 26 is configured so that nitrogen gas guided by the nitrogen supply path 23 is jetted and nitrogen particles are contained in the powder. As shown in FIG. 1, the head of the rotary shaft 21 is connected to a nitrogen gas supply device 27 that supplies nitrogen gas via a rotatable elbow 25 and a nitrogen supply pipe 24.

  The guide cylinder 18 is formed in a cylindrical shape, and guides the granular material conveyed by the auger 19 from the hopper 17 to the storage bag S. In the guide cylinder 18, a negative pressure chamber 18d is formed between an inner cylindrical filter 18b and an outer cylinder 18c. The negative pressure chamber 18d is connected to a suction pipe 30 and is connected to a suction pump (not shown).

  In the powder supply device 11, when a motor (not shown) rotates, the auger 19 rotates, and the powder W in the hopper 17 is supplied to the bag S by the blades 22 of the auger. During this time, the nitrogen supplied from the nitrogen gas supply device 27 is guided through the nitrogen supply path 23 and fed into the granular material W from the nitrogen outlet 26. On the other hand, a suction pump (not shown) is also activated, the suction pump makes the negative pressure chamber 18d have a negative pressure, and extracts air contained in the granular material from the granular material through the filter 18b. Disperse nitrogen into the granule.

  Therefore, the granular material is not easily oxidized by nitrogen and is supplied to the bag S. Then, the bag S is closed. However, before the bag S is closed, the granular material W may rise and flow out of the bag S. Therefore, a gas such as nitrogen or air containing the powder is sucked by a powder collection device 100 described later. The granular material collection | recovery apparatus 100 isolate | separates and collects granular material from the attracted gas, and makes it possible to use the collect | recovered granular material again.

  In FIG. 1, the granular material collection device 100 is much smaller than the granular material supply device 11. This is because the granular material collection device 100 is roughly reduced in size to explain the granular material supply device 11, and the actual granular material collection device 100 is about half of the granular material supply device 11, Alternatively, the size is about (1/3).

(Powder collection device)
FIG. 2 is an external view of the granular material collection device 100 as a minimal material collection device according to an embodiment of the present invention, and is a view in which a gas suction device is omitted. FIG. 3 is a schematic vertical sectional view of FIG. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is an enlarged cross-sectional view of the filter body 120 of FIG. 6 is a cross-sectional view taken along line BB in FIG.

  The granular material collection device 100 is detachable to a casing 103 having an inlet pipe 101 and a gas outlet 102 (FIG. 5) as an entrance into which the gas F <b> 1 containing the granular material enters, and a lower part 103 c of the casing 103. A recovery container 104 that receives the granular material recovered in the casing 103, a gas suction device 105 that makes the inside of the casing 103 a negative pressure, and the like. The casing 103 and the collection container 104 are supported by a support frame 106 (FIG. 2).

  In FIG. 3, an intermediate portion 103b and an upper portion 103a of the casing 103 are formed in a cylindrical shape, and a lower portion 103c is formed in an inverted conical shape.

  A lid 111 that closes the upper portion 103 a of the casing 103 is provided on the upper portion of the casing 103. A cap-shaped flange 113 is provided at the center of the lid 111. In FIG. 3, the flange 113 is formed with a pipe portion 113 d to which the inlet pipe 112 connected to the gas suction device 105 is attached. In FIG. 5, the flange 113 is formed with a gas receiving portion 113 e that receives the gas F <b> 2 from which the granular material has been separated by the filter body 120 described later.

  In FIG. 5, the filter holding plate 114 is in close contact with the lower surface 113 c of the flange 113. The filter holding plate 114 holds the filter body 120 in a suspended state.

  In FIG. 6, the filter holding plate 114 has a plurality of arc-shaped gas outlets 102 having the same center of curvature radius. The gas outlet 102 communicates with the gas suction device 105 through a gas receiving portion 113e of the flange 113 and a pipe 112 attached to the flange 113. A filter body 120 that is located in the casing 103 and covers the gas outlet 102 is held in a suspended state at the lower portion 114 c of the filter holding plate 114.

  The filter holding plate 114 is detachably attached to the flange 113 by a detachable fitting 115. The flange 113, the filter holding plate 114, and the filter body 120 can be removed upward from the lid 111 while being integrated. Further, when the detachable fitting 115 is removed, the filter holding plate 114 and the filter body 120 are separated, the filter body 120 is cleaned, and the clogging of the filter body 120 can be eliminated.

  3 to 6, the filter body 120 includes an inner cylinder filter 121, an outer cylinder filter 122 that is spaced apart from the outer periphery of the inner cylinder filter 121, and lower ends of the inner cylinder filter 121 and the outer cylinder filter 122. Has a bottom part 123 to which is connected. That is, the filter body 120 is formed in a double cylinder shape. The inner diameter lower end 121c of the inner cylinder filter 121 is open. A gas suction space 124 is formed between the inner cylinder filter 121 and the outer cylinder filter 122. A space between the upper end 121 a of the inner cylinder filter 121 and the upper end 122 a of the outer cylinder filter 122 is connected to the gas outlet 102.

  In FIG. 3, the filter protection cylinder 130 having the lower end 130 c opened is suspended from the lower surface 111 c of the lid 111 in a state where the filter body 120 is housed away from the outer cylinder filter 122. Yes. The lower end portion 130 c of the filter protection cylinder 130 projects downward from the lower end portion 120 c of the filter body 120. The casing 103, the inner cylinder filter 121, the outer cylinder filter 122, and the filter protection cylinder 130 are preferably made of metal, and preferably made of SUS that is not easily rusted.

  An intermediate pipe 103 b of the casing 103 is provided with an entrance pipe 101 that penetrates the casing 103. As shown in FIG. 4, the entrance pipe 101 faces the tangential direction of the outer periphery of the filter protection cylinder 130.

  As described above, the ingress pipe 101, the casing 103, the lid 111, the flange 113, the filter holding plate 114, the detachable metal fitting 115, the filter body 120, and the filter protection cylinder 130 are made of metal but made of SUS which is not easily rusted. Is preferred.

  In the above configuration, when the gas suction device 105 is operated, the gas in the casing 103 is sucked through the suction pipe 112, the inside of the casing 103 becomes negative pressure, and further, the inside of the bag S becomes negative pressure through the entry pipe 101. . As a result, the gas F <b> 1 containing the granular material in the bag S is sucked into the casing 103. The gas F <b> 1 is sucked into the granular material recovery space 126 between the casing 103 and the filter protection cylinder 130.

  As shown in FIG. 4, since the ingress pipe 101 faces the tangential direction of the outer periphery of the filter protection cylinder 130, the gas F <b> 1 rarely hits the filter protection cylinder 130 near the entrance pipe 101. For this reason, there is little quantity of the granular material in the gas which hits the filter protection cylinder 130, and the collision sound which generate | occur | produces when a granular material contacts the filter protection cylinder 130 can be made small. In addition, since the filter body 120 is surrounded by the filter protection cylinder 130, the powder body does not directly hit and is not damaged by the powder body. Further, since the powder particles do not contact the filter body 120 directly, clogging of the filter body 120 caused by the contact of the powder particles can be prevented. As a result, the granular material collection apparatus 100 can be used for a long time.

  Since the gas F1 containing the particulate matter sucked into the casing 103 is sucked into the filter protection tube 130 from the lower end portion 130c of the filter protection tube 130, the casing 103 is helped while dropping the powder particles in the gas. It flows downward spirally along the inner wall 130d. For this reason, the granular material W is easily separated from the gas and collected in the collection container 104.

  The gas F1 is sucked into the granular material recovery space 126 between the filter protection cylinder 130 and the outer cylindrical filter 122 and the granular material recovery space 126 in the inner cylindrical filter 121. Contains. However, when the gas F <b> 1 passes through the inner cylinder filter 121 and the outer cylinder filter 122 and is sucked into the gas suction space 124 between the inner cylinder filter 121 and the outer cylinder filter 122, the gas F <b> 1 is separated from the outer cylinder filter 121. The granular material W is removed (separated) by the cylindrical filter 122. Therefore, the gas F1 containing the powder is separated into the gas F2 that does not contain the powder, and the gas outlet 102, the gas receiving part 113e of the flange 113, and the pipe part 113d. Then, the gas is sucked into the gas suction device 105 through the entrance pipe 112. When a certain amount of the granular material adhering to the inner cylinder filter 121 and the outer cylinder filter 122 falls to a certain amount, it falls into its own weight in the collection container 104 and is collected in the collection container 104.

  The granular material accumulated in the collection container 104 can be reused by removing the collection container 104 from the casing 103. When removing the collection container 104, the inside of the casing 103 may be under negative pressure. For this reason, when the collection container 104 is removed, the casing 103 returns to the atmospheric pressure, and when the granular material collection device 100 is activated again, it takes time for the inside of the casing 103 to return to the negative pressure, and the activation time is long. Become.

  Therefore, in order to maintain the inside of the casing 103 at a negative pressure, a butterfly valve 131 as an on-off valve is provided in a lower portion 103c of the casing 103 between the casing 103 and the recovery container 104. The butterfly valve 131 rotates in the direction of arrow E to open and close the lower portion 103c of the casing 103. The inlet pipe 101 is provided with a check valve 132, and the suction pipe 112 is provided with a check valve 133. Therefore, when the recovery container 104 is removed from the casing 103, the casing 103 can be maintained at a negative pressure by closing the butterfly valve 131, the check valve 132, and the check valve 133. When activated, it can be activated promptly.

  Moreover, when the granular material collection | recovery apparatus 100 is used for a long period of time, the inner cylinder filter 121 and the outer cylinder filter 122 will be clogged with a granular material. In such a case, the check valve 132 is closed and the gas F3 is sent from the gas suction device 105 to the casing 103. Then, since the gas F3 passes through the inner cylinder filter 121 and the outer cylinder filter 122 from the gas suction space 124 and flows out to the granular material collection space 126, the inner cylinder filter 121 and the outer cylinder filter 122 are discharged by the gas F3. And clogging can be eliminated.

  In the above configuration, another set of outer cylinder filters and inner cylinder filters are provided in the inner cylinder filter 121, and multiple sets of outer cylinder filters and inner cylinder filters are provided. It may be a configuration.

  In the above granular material collection device 100, the filter body may be a bottomed tubular filter 225 having a bottomed cylindrical shape facing the up and down direction, like the filter body 220 shown in FIGS. FIG. 7 is an enlarged cross-sectional view of a filter body 220 having a form different from that in FIG. 8 is a cross-sectional view taken along the line CC in FIG. 7 and 8, the same parts as those in FIGS. 5 and 6 are denoted by the same reference numerals, and the description thereof is omitted.

  The bottomed cylindrical filter 225 is provided in a suspended state on the filter holding plate 214 with an upper end 225 a attached to the filter holding plate 214. A large diameter gas outlet 202 is formed in the filter holding plate 214.

  The inside of the bottomed tube filter 225 is a gas suction space 224, and the outside is a granular material collection space 226. The bottom 223 of the bottomed cylindrical filter 225 may be a filter or a flat plate. Further, since the filter body 220 is the bottomed cylindrical filter 225, the gas outlet 202 is formed at the center of the filter holding plate 214 that holds the bottomed cylindrical filter 225 in a suspended state.

  This bottomed cylindrical filter 225 can also separate and recover the powder particles in the gas F1 when the gas suction space 224 becomes negative pressure by the suction operation of the gas suction device. The gas F2 from which the granular material has been separated is sucked into the gas suction device through the gas outlet 202, the gas receiving portion 113e of the flange 113, the pipe portion 113d, and the inlet pipe. Further, when the gas F3 is sent from the gas suction device to the gas suction space 224 in the bottomed tubular filter 225, the clogging of the bottomed tubular filter 225 can be eliminated.

  Furthermore, in the above granular material collection apparatus 100, the filter body is a small-diameter bottomed tubular filter inside the filter body 220 shown in FIGS. 5 and 6 as the filter body 320 shown in FIGS. 325 may be provided. FIG. 9 is an enlarged cross-sectional view of a filter body 320 having a different form from that of FIG. 10 is a cross-sectional view taken along line DD in FIG. 9 and 10, the same parts as those in FIGS. 5 and 6 are denoted by the same reference numerals, and description thereof is omitted.

  The bottomed cylindrical filter 325 is provided in a suspended state on the filter holding plate 314 with the upper end 325 a attached to the filter holding plate 314. In addition to the gas outlet indicated by reference numeral 102, the filter holding plate 314 is formed with a gas outlet indicated by reference numeral 302 at the center of the filter holding plate 314.

  The inside of the bottomed tube filter 325 is a gas suction space 324, and a powder body recovery space 326 is formed between the bottomed tube filter 325 and the inner tube filter 121. The bottom portion 323 of the bottomed cylindrical filter 325 may be a filter or a flat plate.

  This bottomed cylindrical filter 325 can also separate the granular material in the gas F2 when the gas suction space 324 becomes negative pressure by the suction operation of the gas suction device. Further, the inner cylinder filter 121 and the outer cylinder filter 122 can also separate the granular material in the gas F1.

The gas F2 separated by the bottomed tube filter 325, the inner tube filter 121 and the outer tube filter 122 is the gas outlets 302 and 102, the gas receiving portion 113e of the flange 113, the pipe portion 113d, and It is sucked into the gas suction device through the entrance pipe.
Further, when the gas F3 is sent from the gas suction device to the gas suction space 324 in the bottomed cylindrical filter 325 and the gas suction space 124 between the inner cylindrical filter 121 and the outer cylindrical filter 122, the bottomed cylindrical filter 325 The clogging of the inner cylinder filter 121 and the outer cylinder filter 122 can be eliminated.

  As described above, the inner cylinder filter 121, the outer cylinder filter 122, and the bottomed cylinder filters 225 and 325 described above are cylindrical, but are not necessarily cylindrical. The cross-section may be a specific circular cylinder such as an ellipse or a square.

  As mentioned above, the granular material collection | recovery apparatus demonstrated above can collect | recover the cutting powder and the dust in a building which are produced in the case of metal cutting in a factory other than a granular material. In other words, the granular material collection device can be used as a minimal material collection device that collects minimal materials such as granular materials, cutting powder, and dust. Even when the granular material collection device is used as a minimal material collection device, increase the collection rate of the minimal material, avoid damage to the filter by the minimal material, prevent clogging of the filter by the minimal material, etc. Can do.

DESCRIPTION OF SYMBOLS 100: Minimal substance collection | recovery apparatus (powder body collection | recovery apparatus), 101: Inlet pipe (advance entrance), 102, 202, 302: Gas outlet, 103: Casing, 104: Collection | recovery container, 105: Gas suction apparatus, 120, 220, 320: filter body, 121: inner cylinder filter, 122: outer cylinder filter, 123, 223, 323: bottom, 124, 224, 324: gas suction space, 126, 226, 326: powder collection space, 130 : Filter protection cylinder, 131: butterfly valve, 132: check valve, 133: check valve, 225, 325: bottomed filter, F1, F2: gas, S: bag (container), W: powder ( Minimal substance).

Claims (9)

A casing having an inlet and a gas outlet through which a gas containing a minimal substance enters;
A filter body covering the gas outlet in the casing;
In a state where the filter body is housed away from the filter body, the filter protection cylinder is provided in the casing and has a lower end opened.
A very small substance recovery device. The filter body has an inner cylinder filter, an outer cylinder filter that is positioned apart from the outer periphery of the inner cylinder filter, and a bottom portion that connects lower ends of the inner cylinder filter and the outer cylinder filter, Connected between the upper end of the inner cylinder filter and the upper end of the outer cylinder filter to the gas outlet,
The minimal substance recovery device according to claim 1, wherein The filter body is a bottomed cylindrical filter oriented in the vertical direction.
The minimal substance recovery device according to claim 1, wherein The filter protection cylinder protrudes downward from the filter body,
The minimal substance recovery device according to any one of claims 1 to 3, wherein: The entrance is directed in the tangential direction of the outer periphery of the filter protection cylinder,
The minimal substance recovery device according to any one of claims 1 to 4, wherein: An opening / closing valve is provided at the entrance, and the gas can be supplied from the gas outlet while the opening / closing valve is closed.
The minimal substance recovery device according to any one of claims 1 to 5, wherein: In the lower part of the casing, it has a storage body for recovering the recovered powder particles.
The minimal substance recovery device according to any one of claims 1 to 6. An opening / closing valve for opening and closing the storage body is provided between the casing and the storage body.
The minimal substance recovery device according to claim 7. A powder supply device for supplying powder to the container;
The container is provided with a minimal substance recovery device that sucks the drifting gas including the granular material and separates and recovers the granular material from the gas.
The minimal material recovery device is the minimal material recovery device according to any one of claims 1 to 8.
A granular material supply system characterized by that.

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