JP6666005B2 - Granular material suction device - Google Patents

Description

  The present invention relates to a granular material suction device that sucks a granular material.

  2. Description of the Related Art Conventionally, there is a granular material device that sucks a granular material into a hopper by suction air of a suction device (Patent Document 1). The granular material device has a filter that allows the passage of air and separates the air and the granular material so that the suction device can suck only the air.

Japanese Utility Model Publication No. 3-32936

  However, the conventional granular material device has a problem that when the granular material is clogged in the filter, the ability to suck air is reduced.

  It is an object of the present invention to provide a powder and granular material suction device that can eliminate clogging of a particulate material even when the filter is clogged.

The present invention provides an air outlet through which internal air is sucked and discharged, and the inside air is suctioned and discharged from the air outlet, whereby external powders are sucked into the inside together with external air. A powder / particle suction container having an air suction port, and attached to the powder / particle suction container which is formed in a vertical cylindrical shape and whose upper portion covers the air discharge port, allows air to pass therethrough, and A filter body for preventing the passage of the granular material, a vibration source provided in the filter body, a temperature detection sensor for detecting a temperature of the filter body, and a temperature detected by the temperature detection sensor reaching a predetermined temperature Then, the above problem is solved by a powder and granular material suction device comprising: a control unit for stopping the vibration of the vibration source and stopping the air suction operation .

  ADVANTAGE OF THE INVENTION According to this invention, when clogging of a granular material arises in a filter body, a filter body is vibrated by a vibration generation source, and clogging can be eliminated easily.

1 is an overall view of a granular material suction device according to an embodiment of the present invention, and is shown in a partial cross section. FIG. 2 is a sectional view taken along the line AA in FIG. 1. FIG. 2 is a schematic cross-sectional view of a filter unit and a filter protection cylinder as a filter body in FIG. 1. FIG. 4 is a cross-sectional view taken along line BB of FIG. 3. FIG. 5 is a view corresponding to FIG. 4 in a filter unit having another shape.

  FIG. 1 is an overall view of a granular material suction device 1 of the present invention, and is shown in a partial cross section. FIG. 2 is a sectional view taken along the line AA of FIG. FIG. 3 is a schematic cross-sectional view of a filter unit as a filter body and a filter protection cylinder in FIG. FIG. 4 is a sectional view taken along the line BB of FIG. Note that the numerical values in the present embodiment are reference numerical values, and are not numerical values that limit the present invention.

(Configuration of powder and granular material suction device)
The granular material suction device 1 is a device capable of sucking and collecting the granular material scattered on a floor, a workbench, air or the like. In addition, the granular material suction device 1 is a device that can transfer a granular material from a container to a container or transport a granular material. The granular material suction device 1 includes a hopper 10, a filter unit 20, a filter protection cylinder 30, a vibration element 40, a vacuum pump 50, an air compressor 60, a control unit 80, and the like.

  The hopper 10 as a powder / granule suction container is a portion for receiving the sucked powder / particle P. The hopper 10 is supported by a support frame 12 on which casters 11 are attached. The hopper 10 has an upper portion formed of a cylindrical portion 10a and a lower portion formed of a conical portion 10b. An upper particle discharge valve (discharge valve) 13A and a lower particle discharge valve (discharge valve) 13B for discharging the powder sucked into the hopper 10 are provided in the vertical direction of the lower end of the conical portion 10b. They are discharged sequentially in the discharge direction. At the lower end of the conical portion 10b, a granular material receiver 14 for receiving the granular material P discharged from the lower granular material discharge valve 13B is detachably provided.

  An air outlet 10c (FIGS. 2 and 3) is formed at the center of the upper part of the cylindrical portion 10a of the hopper 10. The air discharge port 10c is connected to a vacuum pump 50 via a discharge pipe 15. Therefore, the air discharge port 10c is a portion where the air in the hopper 10 sucked by the vacuum pump 50 is sucked and discharged. An air suction port 10d is formed on the upper side of the cylindrical portion 10a of the hopper 10. A powder suction pipe 16 is connected to the air suction port 10d. As shown in FIG. 2, the powder suction pipe 16 is provided on the hopper 10 in a tangential direction of the inner circumference of the cylindrical portion 10 a of the hopper 10. That is, as the air in the hopper 10 is sucked by the vacuum pump 50, the powder / particle suction pipe 16, together with the external air AR, causes the external powder / particle P to move inside the cylindrical portion 10 a of the hopper 10. It is oriented so that it can be sucked along 10aa.

  The filter unit 20 is attached to the hopper 10 such that the filter unit 20 is formed in a cylindrical vertical cylindrical shape, the lower part is closed, and the upper part covers the air discharge port 10c. The filter unit 20 allows the passage of the air AR and prevents the passage of the granular material P. In FIG. 4, the filter unit 20 includes a tubular filter 21, an outer tubular mesh 22 and an inner tubular mesh 23 located outside and inside the tubular filter 21. The tubular filter 21, the outer tubular mesh 22, and the inner tubular mesh 23 are formed in a cylindrical shape, and are arranged concentrically around the air discharge port 10c. It is preferable that the mesh of the outer tubular mesh 22 is formed finer than the mesh of the inner tubular mesh 23 (the reason will be described later). The lower portion of the cylindrical filter 21 is a bottomed portion 21a (FIG. 3). The tubular filter 21, the outer tubular mesh 22, and the inner tubular mesh 23 are formed of a thin wire that is not easily rusted like SUS.

  1 to 3, the outer periphery of the filter unit 20 is surrounded by a filter protection tube 30. The filter protection cylinder 30 is a vertically long cylindrical member that includes the filter unit 20 with a gap G therebetween. The lower part is opened, and the upper part is attached to the hopper 10 concentrically with the air discharge port 10c. I have. The filter protection cylinder 30 is formed to be slightly longer than the filter unit 20.

  In the lower part of the filter unit 20, a vibration element 40 is provided as a vibration source that generates ultrasonic vibration. The vibration element 40 is connected via a cord 83a to an ultrasonic control unit 83 provided outside the filter unit 20. In FIG. 1, the cord 83a extends from the ultrasonic control unit 83 into the filter unit 20 via the discharge pipe 15 and the air discharge port 10c (FIG. 3), and is connected to the vibration element 40.

  The air suction port 10d is provided with an opening / closing valve 17 as opening / closing means for opening / closing the air suction port 10d. An air compressor 60 is connected to the discharge pipe 15. Further, a plurality of temperature detection sensors 70 are vertically arranged inside the filter unit 20. The vibration element 40, the vacuum pump 50, the air compressor 60, the temperature detection sensor 70, and the like are connected to the control unit 80.

  In FIG. 1, the control unit 80 includes an air compressor control circuit 81, a vacuum pump control unit 82, an ultrasonic control unit 83, a temperature determination circuit 84, a shutter opening / closing circuit 85, and a CPU 86 for controlling these. The CPU 86 controls the operation of each plunger (not shown) that opens and closes the vacuum pump 50, the air compressor 60, the on-off valve 17, the upper particulate discharge valve 13A, and the lower particulate discharge valve 13B. I have.

(Explanation of the operation of the granular material suction device)
The control unit 80 operates the plunger (not shown) by the shutter opening / closing circuit 85, opens the air suction port 10 d by the opening / closing valve 17, and operates the vacuum pump 50 by the vacuum pump control unit 82. The vacuum pump 50 sucks the air in the filter unit 20 and sucks the air in the hopper 10 into the filter unit 20 from below the gap G between the filter protection cylinder 30 and the filter unit 20. When the entire pressure inside the hopper 10 becomes a negative pressure lower than the atmospheric pressure, the external air AR is guided to the powder suction pipe 16 and is sucked into the hopper 10 together with the powder P outside the hopper 10.

  The air AR sucked into the hopper 10 is guided by the powder suction pipe 16 which is oriented tangentially to the inner circumference 10aa of the cylindrical portion 10a of the hopper 10, and the inner circumference 10aa of the hopper 10 and the filter protection tube 30 are guided. And flows downward spirally. Then, the air AR enters the gap G from below the filter protection cylinder 30 and the filter unit 20. Then, the external air AR passes through the outer tubular mesh body 22, the tubular filter 21, and the inner tubular mesh body 23 of the filter unit 20 while ascending the gap G, and enters the filter unit 20, It is discharged out of the hopper 10 through the discharge pipe 15.

  At this time, the inside of the filter unit 20 becomes negative pressure, and the filter unit 20 may be deformed into a crushed shape. However, since the filter unit 20 has a structure in which the tubular filter 21 is reinforced by the outer tubular mesh body 22 and the inner tubular mesh body 23, the filter unit 20 is prevented from being deformed into a crushed shape.

  On the other hand, the external powder P sucked into the hopper 10 together with the external air AR is also guided by the powder suction pipe 16, and together with the flow of the external air AR, the inner periphery 10aa of the hopper 10 and the filter protection are protected. It spirally flows downward between the cylinder 30. Then, the granular material P falls to the inner periphery 10ba (FIG. 1) of the conical portion 10b of the hopper 10 by its own weight. At this time, the upper particulate discharge valve 13A is open, and the lower particulate discharge valve 13B is closed. For this reason, the granular material is received by the lower granular material discharge valve 13B, and is detected by the sensor S when a predetermined amount is accumulated. The CPU 86 closes the upper granular material discharge valve 13A. The upper granular material discharge valve 13A receives the granular material. While the upper granular material discharge valve 13A is receiving the granular material, the CPU 86 opens the lower granular material discharge valve 13B and discharges the granular material to the granular material receiver 14. As a result, the granules are collected in the granule receiver 14. After discharging the granular material, the lower granular material discharge valve 13B is closed. Then, the upper granular material discharge valve 13A is opened, and the lower granular material discharge valve 13B receives the granular material until a predetermined amount of the granular material is stored. The opening / closing operation of the upper particulate discharge valve 13A and the lower particulate discharge valve 13B is performed under the control of the CPU 86 via the shutter open / close circuit 85.

  As described above, the granular material suction device 1 collects the external granular material in the granular material receiver 14. For this reason, the granular material suction device 1 can be used as a so-called collection device that sucks the granular material scattered on the floor, the workbench, the air, and the like, and collects the granular material in the granular material receiver 14. The powder collected in the powder receiver 14 is reused. Further, the present invention can be used as a so-called transfer device for transferring the granules in the external container to the granule receiver 14. Further, the present invention can be used as a granular material transport device that transports the granular material transported along the transport path to the granular material receiver 14.

  By the way, a part of the sucked external particulate material P is caused to enter the gap G by riding on the flow of the air AR entering the gap G from below the filter protection cylinder 30 and the filter unit 20, There is also a case where suction is attempted into the unit 20. However, such a granular material P is prevented from entering the filter unit 20 by the cylindrical filter 21 of the filter unit 20, falls into the conical portion 10 b of the hopper 10, and falls into the granular material receiver 14. Collected. Further, when the mesh of the outer tubular mesh body 22 of the tubular filter 21 is formed finer than the mesh of the inner tubular mesh body 23, the outer tubular mesh body 22 also has the powder P. Intrusion into the cylindrical filter 21 can be prevented.

  In the above-described flow of the granular material P, most of the granular material P sucked into the hopper 10 from the air suction port 10d flows along with the air along the inner periphery 10aa of the cylindrical portion 10a of the hopper 10. However, some of the particles P may flow toward the filter unit 20. Since the filter unit 20 is protected by being surrounded by the filter protection cylinder 30, the powder P does not come into contact with the filter unit 20 and is not damaged by the powder P.

  Further, depending on the granular material P, there is also a granular material that adheres to the cylindrical filter 21 of the filter unit 20 due to the suction force of the vacuum pump 50 and cannot be collected in the granular material receiver 14. When the amount of powder and particles attached to the cylindrical filter 21 of the filter unit 20 increases, the filter unit 20 is clogged, and a load is applied to the vacuum pump 50. Then, even if the filter unit 20 has a structure in which the tubular filter 21 is reinforced by the outer tubular mesh body 22 and the inner tubular mesh body 23, the filter unit 20 may be crushed.

  Then, when the vacuum pump control unit 82 detects that the load current value of the vacuum pump 50 has become equal to or more than the predetermined value due to the clogging of the cylindrical filter 21, the CPU 86 of the control unit 80 sets the ultrasonic control unit By 83, the vibration element 40 is ultrasonically vibrated. The filter unit 20 is ultrasonically vibrated by the vibrating element 40, and shakes off the powder particles clogged in the cylindrical filter 21, thereby eliminating the clogging of the cylindrical filter 21.

The filter unit 20 has an upper end attached to the hopper 10, but a lower end that is a free end that is not supported anywhere. Therefore, by the vibration element 40 is provided in the lower portion of the cylindrical filter 21, the filter unit 20 is, the more rather lines the bottom, results in the vibration of the vibrating element 40 vibrates is amplified, clogging Is quickly resolved. The frequency of the vibration element 40 can be adjusted by the ultrasonic control unit 83 in accordance with the granular material. Therefore, clogging of the filter unit 20 can be prevented even when the powdered material to be sucked is replaced.

  However, depending on the granular material, there are a granular material having a high viscosity and easily adhering to the filter unit 20 and a fine granular material that easily penetrates the cylindrical filter 21. Such powders often cause clogging, and the clogging may not be quickly eliminated. In this way, when the load current value of the vacuum pump 50 does not return to a normal value even after the predetermined time elapses without the clogging being eliminated promptly, the CPU 86 of the control unit 80 stops the vacuum pump 50, The on / off valve 17 is operated to close the air suction port 10d. Then, the CPU 86 causes the air compressor control circuit 81 to operate the air compressor 60. As a result, the compressed air in the accumulator tank 61 of the air compressor 60 is supplied from the air discharge port 10c into the filter unit 20 to increase the pressure in the filter unit 20 and blow the powders and particles from the filter unit 20. To eliminate clogging. The pressure storage tank 61 is provided with a pressure gauge 62, a drain cock 63, a pneumatic release valve 64, and the like.

  In the case where the on-off valve 17 is not provided, the pressure difference between the filter unit 20 and the hopper 10 is increased, so that the particles can be easily blown out and clogging can be eliminated promptly. There is a risk that the air will blow out from the mouth 10d and flow backward. Therefore, an on-off valve 17 is provided to prevent the powder from flowing back from the air discharge port 10c to the outside. However, depending on the granular material to be handled, there is also a granular material that can eliminate clogging without increasing the pressure difference between the filter unit 20 and the hopper 10. When handling such a granular material, it is not always necessary to provide the on-off valve 17.

  Further, when the clogging of the filter unit 20 is eliminated by the ultrasonic vibration of the vibration element 40, some of the clogged powders require a slightly longer vibration time depending on the clogged powders. In such a case, the vibration time of the filter unit 20 becomes long, and the cylindrical filter 21 generates heat due to the vibration, and there is a possibility that the granular material contacting the cylindrical filter 21 is deteriorated. In this case, when the temperature detected by the temperature detection sensor 70 is determined to have reached the predetermined temperature by the temperature determination circuit 84, the CPU 86 causes the ultrasonic control unit 83 to stop the ultrasonic vibration of the vibration element 40. Then, the CPU 86 informs the operation panel 87 that the clogging has not been eliminated. In this case, the CPU 86 may stop the suction operation of the vacuum pump 50 and the ultrasonic vibration operation of the vibration element 40 and operate the air compressor 60 to blow out the clogged powder. . Further, it is preferable that the temperature detection sensor 70 be provided near the vibrating element 40 as a place where the filter unit 20 easily generates heat or at a portion where the filter unit 20 vibrates most. In addition, the number of the temperature detection sensors 70 is not limited, and may be one or more.

  In the above-mentioned granular material suction device 1, the lower part of the cylindrical filter 21 has a bottom and the vibrating element 40 is provided at the bottom. The cylindrical filter 21, the outer cylindrical mesh 22, the inner cylindrical At least one lower portion with the net body 23 may be a bottomed portion, and the vibration element 40 may be provided at the bottomed portion. When a plurality of members have a bottomed portion, it is preferable to provide the vibration element 40 at the innermost bottomed portion.

  Further, the position where the vibration element 40 is provided is not limited to the lower part of the filter unit 20, and may be provided at an intermediate part or an upper part, may be provided at a plurality of positions in the vertical direction, and May be provided in the circumferential direction. Further, it may be provided outside the filter unit 20. However, the vibrating element 40 is preferably provided inside the lower part of the filter unit 20 where the filter unit 20 is easily vibrated and the granular material does not come into contact with the vibrating element 40 and is hardly damaged.

  Further, the filter unit 20 is protected by an outer tubular mesh body 22 and an inner tubular mesh body 23 so as not to be deformed by a change in internal pressure. However, an outer porous tube 24 having a plurality of through-holes 24a formed outside the outer cylindrical mesh 22 (FIG. 5), and a plurality of through-holes 25a formed inside the inner cylindrical mesh 23. The filter unit 20 may be further reinforced by providing at least one of the inner perforated cylinders 25 formed with.

  Further, the hopper 10, the filter unit 20, and the protective cylinder 30 are formed in a cylindrical shape, but may be formed in a rectangular cylindrical shape, and are not limited to the cylindrical shape. What is necessary is just to be formed in a cylindrical shape.

  As described above, in the granular material suction device 1 of the present embodiment, when the granular material is clogged in the filter unit 20, the filter unit 20 is vibrated by the vibration element 40 to easily eliminate the clogging. be able to.

  1: Granular material suction device, 10: Hopper (granular material suction container), 10a: Cylindrical part, 10aa: Inner circumference, 10b: Conical part, 10ba: Inner circumference, 10c: Air discharge port, 10d: Air suction port , 13A: upper particulate discharge valve (discharge valve), 13B: lower particulate discharge valve (discharge valve), 15: discharge pipe, 16: powder suction pipe, 17: open / close valve (open / close means), 20 : Filter unit (filter body), 21: cylindrical filter, 21a: bottomed part, 22: outer cylindrical mesh, 23: inner cylindrical mesh, 24: outer porous cylinder, 25: inner porous cylinder, 30: filter Protective cylinder, 40: vibrating element (vibration source), 50: vacuum pump, 60: air compressor, 70: temperature detection sensor, 80: control unit, P: external powder, AR: external air.

Claims (8)

An air discharge port through which the internal air is suctioned and discharged, and an air suction port through which the external particles are sucked into the inside together with the external air by suctioning and discharging the internal air from the air discharge port. A granular material suction container having:
A filter body that is formed in a vertical cylindrical shape, and is attached to the granular material suction container so that the upper part covers the air discharge port, allows the passage of air, and blocks the passage of the granular material,
A vibration source provided in the filter body;
A temperature detection sensor for detecting the temperature of the filter body,
When the temperature detected by the temperature detection sensor reaches a predetermined temperature, a control unit that stops the vibration of the vibration source and stops the air suction operation .
A granular material suction device characterized by the above-mentioned. The vibration source is provided at a lower portion inside the filter body,
The granular material suction device according to claim 1, wherein: The filter body includes a tubular filter, an outer tubular mesh body and an inner tubular mesh body located outside and inside the tubular filter,
The granular material suction device according to claim 1 or 2, wherein: The mesh roughness of the outer tubular mesh is finer than the mesh roughness of the inner tubular mesh,
The granular material suction device according to claim 3, characterized in that: The filter body has an outer porous tube in which a number of through holes are formed outside the outer cylindrical mesh, and a number of through holes formed in the inside of the inner cylindrical mesh. With at least one of an inner perforated cylinder,
The granular material suction device according to claim 3 or 4, wherein: The filter body is provided with a filter protection cylinder which is formed in a vertical cylindrical shape, has a lower part opened, and an upper part attached to the powdery material suction container, and has the filter body therein.
The granular material suction device according to any one of claims 1 to 5, wherein: An opening and closing means for opening and closing the air suction port,
The air discharge port is capable of blowing air into the filter body in a state where the air suction port is closed by opening / closing means.
The granular material suction device according to any one of claims 1 to 6, wherein: In the powder and granular material suction container, a plurality of discharge valves for opening and closing the lower part of the powder and granular material suction device are sequentially arranged in the discharge direction of the powder and granular material,
The granular material suction device according to any one of claims 1 to 7, wherein:

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