JP4315905B2 - Method and apparatus for dust removal, vertical conveyance and dust collection of granules - Google Patents

Description

[0001]
【Technical field】
  The present invention relates to a method and an apparatus for powder collection, vertical conveyance and dust collection of granules. For example, a granule molded by a granule molding machine or a powder compression molding machine, powder adhering to it, and unnecessary powder discharged together without adhering (referred to as powder in this specification) are added. Compressed air (herePressurized airAnd the two are separated at the same time to remove the powdery material from the granule, take out the granule from the apparatus and collect the powdery material so that it can be collected.
[0002]
[Background]
  Conventionally, when a granule is formed from powder as a raw material or a material with the above-mentioned granule molding machine, the powder is attached to the granule, or the powder is a group of particles without adhering. Are mixed and discharged from the granule molding machine. Here, for example, a granule is a granule such as a medicine, food, metal / mineral product, paper / wood product, chemical product, petroleum product, etc., and the granule is a product / product, but powder is not required. It is necessary to remove it as an extraneous matter / mixture, and a powder remover is installed below the granule outlet of the molding machine.
[0003]
  Conventionally, for example, there are the following as means for removing powder from a granular material.
[0004]
  B) A screw that can be rotated by a rotating shaft is disposed inside a multi-porous cylinder formed of a punching panel or mesh, and a group of particles with powdery substances adhering or mixed together is placed at the front of the cylinder. While removing the powder from the granule and separating and removing the powder from the multi-pores while being conveyed to the rear by a rotating screw (for example,Patent Document 1FIG. 8).
[0005]
  B) For examplePatent Document 1As shown in Fig. 3, a vibratory feeder is used, and a group of particles with powdery substances adhering to or mixed in a spiral feeder path is introduced, and the particles are separated from the particles by vibration during the conveyance. In addition to removing the powdery substance, the powdery substance is sucked and removed from a number of suction holes formed in the bottom of the passage.
[0006]
  C) For examplePatent Document 2As can be seen from the above, powder particles flowing down from the outer peripheral edge in a cylindrical classification chamber are sucked into the classification chamber and classified by air vortexed freely in the classification chamber It is a body classifier, has a truncated cone shape with an axial center located above the classification chamber, is arranged concentrically with the classification chamber, and the classification chamber is arranged around the outer periphery. A separate core having a gap formed so as to communicate with the lower side, and a fine powder that opens on the upper surface of the axial center of the separate core and sucks air into the classification chamber so as to form a free vortex in the classification chamber The separate core is separated from the axially concentric shaft center and the outer peripheral edge guide portion at a predetermined interval, and the radius of the axial core is classified. The limit particle is larger than the radius of the rotation circle when it is rotated by a free vortex.
[0007]
  D) For examplePatent Document 3In the tablet surface powder removing device for removing the powder adhering to the tablet surface, the tablet is flow-stirred and the tablet is fluidly stirred by blowing compressed air into the fluid stirring area. Thus, there are provided an air blowing device that shakes off the powder adhering to the surface of the tablet, and an air suction device that sucks and removes the powder shaken off from the surface of the tablet outside the flow stirring region.
[0008]
  However, in the case of the above (a), since the cylindrical body has a structure that is long in the lateral direction, the size of the machine / device is increased and the installation space is increased. Since it is transported by the rotation of the screw, the particles hit the inner surface of the cylinder, damaged by rubbing between the particles, and cannot be transported vertically. There was a problem that it was necessary to provide another.
[0009]
  In the case of (b) above, the noise and vibration of the vibration part of the vibration feeder is very large, the vertical transfer is limited to about 1000 mm, and it cannot be transferred to higher heights, and it is also the suction of powdery materials・ It was necessary to install a separate dust collector.
[0010]
  In the case of (c) above, continuous automatic operation has become common because of the improvement in productivity as recently, and the container for storing the produced particles becomes large and the container is placed on the automatic exchange table. In this case, it is necessary to put the particles into the opening at a high position, but the vertical conveyance for that purpose cannot be performed. In addition to the powder classifier, it is necessary to prepare a device for vertical conveyance, and here, primary and secondary high-pressure air must be continuously sent from the outside, and operation and maintenance costs are high. Contrary to the spirit of energy saving.
[0011]
  In the case of the above (2), after the particles are put into the particle agitation box, the upper shutter is closed, the compressed air is blown out, the powder is shaken off by the particle agitation action, and then the air blowing is stopped and the air suction is also stopped. Then, the lower shutter is opened to take out the particles, and the intermittent work is performed, which causes a problem in productivity. Moreover, in order to do it continuously, there is a problem that the apparatus is increased in size by installing it on a transport machine, etc., and it is necessary to prepare a separate vertical transfer device for vertical transfer. It was.
[0012]
  In other words, this type of conventional one has a powder removal machine, a vertical conveyance machine, a dust collector, etc. in addition to a granule molding machine, etc. There was also a lot of vibration and noise.
[0013]
[Patent Document 1]
JP-A-8-141051
[0014]
[Patent Document 2]
JP-A-6-154708
[0015]
[Patent Document 3]
Japanese Patent Laid-Open No. 10-227
[0016]
DISCLOSURE OF THE INVENTION
  The present invention has been developed with the object of solving the problems of this type of conventional technology. In other words, the objective is to have a function that removes unnecessary powdery materials while being small and light, and has a small installation area. The removed powdery materials are surely collected and scattered around. It has the necessary vertical transfer capability, and in addition, vibration and noise are reduced, installation and handling are easy, and equipment and operating costs can be reduced, which is desirable for energy saving. An object of the present invention is to provide a method and apparatus for dust removal, vertical conveyance and dust collection.
[0017]
  That is, according to the method of powder collection and vertical conveyance and dust collection according to the present invention, a particle and a powdery material that is lighter than the particle are used., Generated by a pressurized air generator using the force of discharging air by a pressurized air generator, the force of sucking by a suction machine, and the centrifugal force by discharging compressed air in a spiral shapePressurized airWhile spiraling withTo the specified positionRaiseThe compressed air is depressurized at a predetermined position to separate the granules and the powdery materials based on their own weight differences,IsCollect by dropping with its own weight, and separate the powder from the particlesWith suction machineSuctionTo doIt is characterized by collect | recovering by.
[0018]
  With such a configuration, when the powder is attached to the granule, or when the granule and the powder are mixed and conveyed in the upward direction by pressurized air, It becomes possible to separate a body and a powdery substance. The separated particles are collected when they fall due to their own weight, and the powdery material is collected by suction. Therefore, it is possible to efficiently collect the particles to which the powdery material does not adhere, and unnecessary powdery materials. It becomes possible to collect objects without scattering them.
[0019]
  In the above configuration, it is preferable that the pressurized air generator and the suction device are a single device.
[0020]
  In addition, by sucking the powdery material, outside air is taken in from the particle feeding port for supplying the granular material with powdery material and the particle taking-out port communicating with the outside, and the flow of air is used to What raises the raising force to the predetermined position of a body and a powdery thing and the collection | recovery power of a powdery thing is suitable.
[0021]
  Furthermore, by partially discharging the pressurized air generated by the pressurized air generator to the outside, the outside air is taken in from the granular material inlet and the granular material outlet, and until a predetermined position between the granular material and the powdery material. When improving the lifting force and the collection power of the powdered material, the sum of the amount of part of the pressurized air discharged to the outside and the amount of outside air taken in from the particle feeding port and the particle taking-out port is the same Those are preferred.
[0022]
  In addition, the particle dusting / vertical conveying / dust collecting apparatus according to the present invention includes a hollow pressure feeding tube, a pressurized air supply chamber communicating with the pressure feeding tube at a lower end of the pressure feeding tube, and a pressure feeding from a lower end side of the pressure feeding tube. A pressure feeding means for pumping the granules put into the pipe and a powder that is lighter than the granules upward by pressurized air flowing from the lower end side of the pressure feed pipe, and a pressure feed pipe provided at the upper end of the pressure feed pipe The pressure air flowing in from the outlet is depressurized to separate the granules and the powder, and the decompression chamber that discharges only the granules to the outside from the takeout port; A pressurized air suction pipe communicating with the decompression chamber at the upper end of the pressure feeding pipe, a collecting means for sucking the atmosphere in the pressurized air suction pipe from the pressurized air suction pipe, and collecting only the powdery substance in the decompression chamber; In the room, a separation plate with small holes or slits, and a granular material feed for supplying powdery granular material to the lower end of the pressure feeding tube Write port andA pressurized air guide body that is provided below the granule feeding port and that rotates the pressurized air and sends it into the pressure feeding pipe.It is characterized by providing.
[0023]
  Furthermore, the apparatus for particle dusting / vertical conveyance / dust collection according to the present invention includes a hollow pressure feeding tube, a pressurized air supply chamber communicating with the pressure feeding tube at a lower end of the pressure feeding tube, and a lower side of the pressure feeding tube. A pumping means for pumping the granules put into the pumping tube and a powdery material lighter than the granules upward by pressurized air flowing from the lower end side of the pumping tube, and a pumping unit provided at the upper end of the pumping tube. Depressurize the pressurized air flowing in from the pipe to separate the granules and powders, discharge only the granules from the take-out port to the outside, and a granule take-out port communicating with the outside at the lower part of the decompression chamber And a pressurized air suction pipe communicating with the decompression chamber at the upper end of the pressure feed pipe, and a collecting means for sucking the atmosphere in the pressurized air suction pipe from the pressurized air suction pipe and collecting only the powdery substance in the decompression chamber; In the decompression chamber, supply the granular material with powdery material to the separation plate with small holes or slits and the lower end of the pumping tube. A body delivery port, a ventilation duct for sending pressurized air generated by a pressurized air generator to a pressure delivery tube, a partial exhaust port whose size is adjustable in the middle of the ventilation duct, a ventilation duct and a pressure delivery tube In the vicinity of the boundary, the nozzle section that narrows the ventilation cross section locally, a part of the exhaust outlet, an adjustment lid that determines the exhaust amount, and the lower end of the pressurized air suction pipe communicate with the pressurized air suction pipe And a dust collection filter that filters the powder from the atmosphere in the powder collection chamber, and an air intake port that communicates with the dust collection filter.
[0024]
  Moreover, what comprises the suction machine which attracts | sucks the atmosphere in a powdery material collection chamber through a dust collection filter is suitable.
[0025]
  Furthermore, it is preferable to have a double structure in which a pressurized air suction pipe is provided inside the pressure feeding pipe.
[0026]
  The pressure feeding means includes a pressurized air supply chamber communicating with the pressure feeding pipe below the pressure feeding pipe, and a pressurized air generator disposed in the pressurized air supply chamber and having an air intake port.Pressurized airAt the lower end of the suction pipePressurized airA powder collection chamber provided in communication with the suction pipe and a filter for filtering the powder from the atmosphere in the powder collection chamber, and sucking the atmosphere by communicating the filter with an air intake port Is preferred.
[0027]
  The pressure feeding means includes a pressurized air supply chamber communicating with the pressure feeding tube below the pressure feeding tube, a pressurized air generator having an air intake port disposed in the pressurized air supply chamber, and a lower end side of the pressure feeding tube. And a blowing guide body that guides the pressurized air generated and generated by the pressurized air generator into the pressure feeding pipe, and the recovery means includes:Pressurized airAt the lower end of the suction pipePressurized airThe powdery substance is filtered from the powdery substance collection chamber provided in communication with the suction pipe and the reduced-pressure air in the powdery substance collection chamber.Dust collectionThe atmosphere inside the filter and powder collection chamberDust collectionA thing provided with the suction machine which attracts | sucks through a filter is preferable.
[0028]
  In order to reduce the size of the device,Pressurized airA suction tube is disposed in the pumping tube;Pressurized airIt is preferable that a sufficient space is formed between the suction tube and the inner wall of the pressure feeding tube so that the granules and the powdery material can pass therethrough.
[0029]
  In order to promote the separation of the granular material and the powdery material, it is desirable that the blowout guide body has an inclined guide plate that guides the pressurized air so as to swirl spirally within the pumping tube.
[0030]
  Furthermore, the method of dust removal and vertical conveyance and dust collection according to the present invention is a method of using pressurized air discharged from a pressure generator.SwirlThe powder containing powder is fed into the pressure feed tube, and the powder containing powder is introduced into the pressure feed tube, and both the pressurized air and the powder-attached particle are raised to a predetermined position to remove the powder from the particle. Separated in the decompression chamber, the particles fall down to the particle take-out port, and the pressurized air containing the powdery substance is in the pressurized air suction tube using the suction force generated by the pressurized air generator or suction machine It is characterized in that it is sent to the lower end and the powdery matter is removed by a dust collecting filter and then discharged as pressurized air again through a pressurized air generator to circulate the pressurized air.
[0031]
  In the method of powder collection and vertical conveyance and dust collection according to the invention of the present application, by installing a separation plate having a small hole or a slit in a decompression chamber, the particles and the powdery substance are separated. What separates is preferable.
[0032]
  As is apparent from the above, the method and apparatus for dust removal and vertical conveyance and dust collection according to the present invention has a function of removing unnecessary powder and reliably collects the removed powder. In addition, it has the necessary vertical transfer capability without being scattered around, and in addition to that, vibration and noise are reduced, and the installation area can be reduced with a small size and light weight.
[0033]
  In the powder removal and vertical conveyance method and apparatus of the granular material of the present invention, in which the powder removal unit, the vertical conveyance unit and the dust collection unit are integrated,Pressurized airRemoves powder and performs vertical conveyance in a pipe installed upright usingPressurized airIt collects dust by circulating movement of.
[0034]
  Therefore, a) pressure feeding pipePressurized airSince the suction pipe can be erected to make the entire apparatus vertically long, the size and weight can be reduced, the installation area can be reduced, and the installation can be facilitated.
[0035]
  B) In a vertically long pipePressurized airAt the same time to the granular material with powderPressurized airIs used to separate and remove the powdered material. Therefore, it is possible to reliably perform vertical conveyance without damaging the particles, and to separate and remove the powdery material.
[0036]
  C) Particles in the decompression chamber are carried out from the particle discharge pipe.Some exhaust portsFromPressurized airSince a part ofGranule inletThere is negative pressure in the vicinity and in the decompression chamber. for that reason,Granule inletThen, the particles can be sucked and naturally fed into the pressure feeding pipe. Moreover, in the particle discharge pipe, since the outside air flows into the decompression chamber from the gap, the powder is blocked by the flow and the particles are It can be prevented from flowing out to the outside from the discharge pipe and scattered, and the surrounding environment is not polluted.
[0037]
  D) The powdery material put into this device together with the particles is taken out separately.Pressurized airIs sucked into the dust collection filter and collected. Therefore, the entire apparatus including the dust collecting portion can be reduced in size and weight, the structure can be simplified, and the manufacturing cost of the apparatus can be reduced.
[0038]
  E) As mentioned above, removal of powder and vertical conveyancePressurized airTherefore, quiet processing can be performed without generating large vibrations and noises.Pressurized airSince it is designed to be circulated and moved, it is easy to handle and can reduce the operating cost, thus meeting the spirit of energy saving.
[0039]
BEST MODE FOR CARRYING OUT THE INVENTION
  FIG. 1 to FIG. 6 show a first embodiment of an apparatus used for carrying out the method of powder removal and vertical conveyance and dust collection according to the present invention. The device is at the bottomPressurized airA supply chamber 1 is provided, a pressure feed pipe 4 for vertical conveyance and removal of powdery substances is provided at the upper part, a decompression chamber 8 is provided at the upper part, and downward from there.Pressurized airThe suction tube 10 and the above in the lower partPressurized airA powdery material collection chamber 11 is provided in the vicinity of the supply chamber 1.
[0040]
  Pressurized airThe supply chamber 1 and the pressure feed pipe 4 will be described later.Pressurized airThe generator 2 and the ventilation duct 3 constitute a pressure feeding means. Also,Pressurized airThe suction pipe 10 and the powdery substance collection chamber 11 constitute a collection means together with a dust collection filter 12 described later. In this embodiment, the pressure feeding means is configured as described in detail below.Pressurized airGenerator 2 isPressurized airBecause of the integral structure of the supply chamber 1 and the powdery material recovery chamber 11, it also functions as a recovery means. In FIG. 1, reference numeral 24 denotes a supply pipe for the powdered granular material b, and 29 denotes a pressure feeding pipe support member.
[0041]
  the abovePressurized airThe supply chamber 1 is placed on a horizontal plate 20 in a box-shaped chamber having a caster 19 at the bottom.Pressurized airThe generator 2 is arranged, and the ventilation duct 3 formed between the side plate 22 and the bottom plate 23 through the flexible tube 21 is communicated to the lower end of the pressure feed tube 4 to be described later so that the pressurized air a1 can be supplied. is there.Pressurized air generator2 has, for example, a sirocco fan and has an air intake 2a, which will be described later.Pressurized airThe atmosphere in the supply chamber 1 is sucked from the air intake 2a and generated.Pressurized aira1Pressurized airThe air is output to the ventilation duct 3 so as not to leak into the supply chamber 1.
[0042]
  In the lower part of the ventilation duct 3, the size of the hole can be adjusted by a slide type adjustment lid 13 here.Some exhaust ports5 passes through the ventilation duct 3 as shown in FIG.Pressurized airA part a2 of a1 is discharged.
[0043]
  The adjustment lid 13 is provided above the nozzle portion 6.Granule inletThis is for determining the discharge amount so that the inside of the decompression chamber 8 has a negative pressure more than the outside air even if the outside air d1 flowing into the pressure feeding tube 4 from the 7 is added.
[0044]
  So thisSome exhaust portsEmissions at 5 areGranule inlet7 corresponds to the sum of the amount of outside air d1 flowing into the pressure feeding pipe 5 from the amount 7 and the amount of outside air d2 flowing into the decompression chamber 8 that has become negative pressure from the granule outlet 9 for pressure equalization. .
[0045]
  The pressure feeding pipe 4 isPressurized airA pipe having a smaller ventilation cross section than the ventilation duct 3 is erected toward the upper side of the supply chamber 1.Pressurized airA double structure having the suction tube 10 is provided. The size here is about 2000 mm in height, the outer diameter of the pressure feeding tube 4 is about 85 mm,Pressurized airThe outer diameter of the suction pipe 10 is about 50 mm, and the annular ventilation section of the pressure feeding pipe 4 is smaller than the ventilation section of the ventilation duct 3.
[0046]
  An annular member 16 is provided as a nozzle portion 6 at the rear end portion of the ventilation duct 3 in the vicinity of the boundary with the lower end portion of the pressure feeding tube 4 so as to narrow the ventilation cross section smaller than that of the pressure feeding tube 4. The powdered granular material b is sucked and fed between the lower end of the pressure-feeding tube 4 above the portion 6.Granule inlet7 is formed. Outside air is also sucked and introduced from the inlet 7 together. Here, the inner diameter of the annular member 16 of the nozzle portion 6 is about 60 mm.
[0047]
  In addition, between the ventilation duct 3 and the nozzle portion 6, as shown in FIG.Pressurized airNozzle portion 6 or so that a1 rises while swirling in pumping tube 4Granule inletHas a curved surface in the vicinity of 7Pressurized airA guide body 40 is provided (not shown in FIGS. 1 and 4). thisPressurized airThe guide body 40 isPressurized airWhat is necessary is just to turn or rectify a1 and send it to the pressure feed pipe 4.
[0048]
  Specifically, thisPressurized airThe guide plate 40 has a substantially cylindrical bottom and a center.Pressurized airA barrel 40b having an opening 40a into which the suction pipe 10 is inserted, a truncated cone 40d having an opening 40c at the upper end of the barrel 40b, and a mounting flange 40e provided at the upper end of the truncated cone 40d. Become. The body portion 40b is opened to the side surface by being offset outward.Pressurized airAn introduction port 40f is provided.Pressurized airIntroduced from the inlet 40fPressurized aira1 moves along the inner surface of the body 40b and turns into the body 40b.Pressurized aira1 is formed. This turnsPressurized aira1 rises along the inner surface of the truncated cone part 40d, and enters the pressure feed pipe 4 from the opening 40c at the upper end thereof.Pressurized airIt turns up spirally along the suction pipe 10 and rises.
[0049]
  The nozzle part 6 is connected to the ventilation duct 3 in the center.Pressurized airIn the annular member 16 having a round hole 28 through which a1 passes, the inner diameter of the central round hole 28 is made smaller than the inner diameter of the pumping tube 4. With pressure-feed pipe 4Pressurized airIn the case of a double structure with the suction pipe 10, the central round hole 28 of the annular member 16 and the inner sidePressurized airBetween the outer peripheral surface of the suction tube 10Pressurized aira1 passes. In addition, the gap formed between the nozzle portion 6 and the lower end of the pressure feeding tube 4 is the powdery granular material b.Granule inletFrom here, the outside air is also sucked and introduced together with the granular material b with powder.
[0050]
  It is desirable that the distance between the upper surface of the nozzle portion 6 and the lower end of the pressure feeding pipe 4 be adjustable by adjusting the vertical direction of the pressure feeding pipe 4 or fitting an adjustment plate slidable on the outer periphery.
[0051]
  A pressure reducing chamber 8 is formed on the upper portion of the pressure feeding tube 4 by covering the outer periphery of the pressure feeding tube 4 with a cap-like upper cover plate 25 so as to wrap the outer periphery. Here, the inner diameter of the decompression chamber 8 is about 160 mm. The decompression chamber 8 is provided with a bottom plate 26 inclined in one side direction and partially opened to form a granule take-out port 9 for dropping and taking out the granule b. Between the pipe 27, there is a gap 18 through which the outside air d2 can flow. The upper cover 25 can be removed at the upper half as necessary.
[0052]
  In the decompression chamber 8 at the upper part of the pressure feed tube 4, the atmosphere for taking out the granular material outlet 9 to the lower side and the decompression chamber 8 is sucked.Pressurized airA suction tube 10 is provided in communication with the decompression chamber 8. In the decompression chamber 8, a granule / powder separation plate 14 may be provided so that the granule b that has been vertically conveyed in the pressure feeding tube 4 is separated from the powder c and easily falls. desirable. It is desirable that the separation plate 14 is formed with a small hole 17 or a slit having a size that allows the powder c to pass through without passing through the granule b.
[0053]
  That is, in the decompression chamber 8, here in the pressure feed pipe 4.Pressurized airProvided for return tripPressurized airThe upper part of the suction pipe 10 is communicated.Pressurized airA separation plate 14 having a trumpet-shaped portion that extends upward is provided at the top of the suction tube 10. The separation plate 14 isPressurized airIt is formed separately from the suction tube 10,Pressurized airThe suction tube 10 is detachably attached. The separation plate 14 is formed with a large number of small holes 17 having a size that allows the powder c to pass but the particles b cannot pass. Here, since it is assumed that the particle body b has an outer diameter of 6 mm or more, the inner diameter and width of the small hole 17 and the slit are set to about 6 mm or less, but if the size and the maximum outer diameter of the particle body b are different, the small hole -What is necessary is just to replace | exchange for the separation plate 14 from which the magnitude | size of a slit differs.
[0054]
  The separation plate 14 may be formed in a bowl shape that is not a trumpet but upside down and opened on the side of the particle outlet 9 (see FIG. 7). However, if the inside of the decompression chamber 8 is enlarged,Pressurized airThe separation plate 14 is not necessarily required because the momentum of the pressure is weakened and all of the particles fall under their own weight.
[0055]
  The particle take-out port 9 is directed to the particle receiving container 15, but does not communicate with the particle receiving container 15 in a sealed manner, and the decompression chamber 8 is almost equal to the atmospheric pressure or slightly. A gap 18 is provided so that the outside air d2 for making a negative pressure can be sucked into the decompression chamber 8.
[0056]
  the abovePressurized airThe suction pipe 10 has a lower portion communicating with the powdery material collection chamber 11, and a dust collection filter 12 is detachably provided in the powdery material collection chamber 11 here. The dust collection filter 12 here uses a hepa filter (ultra-high performance air filter). The dust collection filter 12 may be configured by appropriately combining a filter having a coarser mesh than the hepa filter, in addition to the one using the hepa filter alone.
[0057]
  The powdery material collection chamber 11 is the abovePressurized air generator2 providedPressurized airProvided adjacent to the supply chamber 1 and through a dust collecting filter 12Pressurized airIt communicates with the supply chamber 1. Therefore, from the decompression chamber 8Pressurized airSucked into the suction tube 10Pressurized airThe atmosphere in the suction tube 10Pressurized airHere, a3 and the powdery material c pass through the dust collecting filter 12, and the powdery material c is moved by the dust collecting filter 12.Pressurized airremoved from a3 and recovered,Pressurized aira3 againPressurized airSupply room 1Pressurized air generator2 and the same as the originalPressurized airIt is made to discharge again to the ventilation duct 3 as a1.
[0058]
  Above in each partPressurized airThe amount of air in a1 isPressurized airWhen discharged from the feeder 1Pressurized aira1 andSome exhaust ports5 in the ventilation duct 3 after discharging a partPressurized aira1 andGranule inlet7, after the outside air is sucked d1 and flows in,Pressurized aira1 and the inside of the decompression chamber 8 immediately after the outside air d2 is sucked from the particle outlet 9Pressurized airThe amount of air is different from a1. However, the abovePressurized airWhen discharged from the feeder 1Pressurized aira1 and in the decompression chamber 8Pressurized aira1Pressurized airWhen sucked by the suction tube 10Pressurized airThe amount of air with a3 is the same.
[0059]
  In the above-described embodiment, the portion in contact with the granule b is made of synthetic resin so that the granule b is not scratched.
[0060]
  The operation and operating state of the above-mentioned method and apparatus for powder collection, vertical conveyance and dust collection according to the present invention are as follows.
[0061]
   Pressurized airDrive generator 2Pressurized aira1 is discharged to the ventilation duct 3 and sent out toward the pressure feeding pipe 4 through the ventilation duct 3. On the way, most of it moves towards the pressure feed pipe 4,Pressurized airA part a2 of a1 is provided in the middle of the ventilation duct 3Some exhaust portsEvacuate 5 and reduce the amount of air a little.
[0062]
  Headed to pressure tube 4Pressurized airSince a1 passes through the nozzle section 6 with a narrowed ventilation cross section at a higher speed, the pressure decreases around the upper portion of the nozzle section 6 to become a negative pressure. Therefore, it was provided on the upper part of the nozzle part 6Granule inlet7, the particles b together with the adhering or mixed powder c are sucked and fed into the pressure feeding tube 4. At this time, some outside air is also sucked together and flows into the pressure feed tube 4.
[0063]
  Moves upward in the pressure feed tube 4Pressurized aira1 pushes up and conveys the granular material b with the powdery substance, but since the granular material b has its own weight and the rising speed becomes slow, the granular material b with the powdery substance isPressurized airThe powdery material that has been exposed to and hit by a1 and adhered to the surface is peeled off from the particles b and removed from the particles b. In this first embodimentPressurized airFor turningPressurized airSince the guide plate 40 is provided,Pressurized aira1 rises while rotating spirally in the pressure feed tube 4. Therefore, the powdery material c is further peeled off from the granular material b and is easily removed.
[0064]
  ThenPressurized aira1 is depressurized in the wide decompression chamber 8 above the pumping tube 4 to reduce the speed, and the force to push up the granule b is lost. The powdery substance c that has moved toward the granular material receiving container 15 and separated from the granular material b or conveyed together with the granular material b to the decompression chamber 8 floats in the decompression chamber 8 and enters the decompression chamber 8. Mix with atmosphere. Thus, the granular material b is vertically conveyed and the powdery material c is removed from the granular material b.
[0065]
  In the above case, the atmosphere containing the powdery substance c in the decompression chamber 8, that is,Pressurized aira1 communicates with the decompression chamber 8Pressurized airAlthough it is sucked by the suction pipe 10, the amount of air sucked isPressurized airIn supply room 1Pressurized airBlown out from the feeder 2Pressurized airAlmost equal to a1. However, first of the ventilation duct 3Some exhaust portsSince part a2 is exhausted from 5,Granule inletEven if the outside air d1 sucked in and flows in is added, the inside of the decompression chamber 8 becomes a negative pressure than the outside air.
[0066]
  Therefore, the amount of the outside air d2 corresponding to the shortage is sucked toward the decompression chamber 8 from the gap 18 of the particle outlet 9 for equalizing the pressure. The powdery substance c is prevented from leaking out or scattering from the body outlet 9.
[0067]
  And the powdery substance c in the said decompression chamber 8 is the following.Pressurized airVia the suction tube 10,Pressurized airThe suction force by the generator 2 acts. Therefore, the powder c isPressurized airInside the suction tube 10Pressurized airIt moves to the lower powder collection chamber 11 together with a3.
[0068]
  A dust collection filter 12 is provided in the powdery material collection chamber 11 and receives a suction force as described above.Pressurized airThe powder c together with a3 is collected when passing through the dust collecting filter 12.Pressurized airRemoved from a3. As a result, the powdery material c is collected and collected.
[0069]
  After the powder c is collected and recoveredPressurized aira3 isPressurized airBy passing through the generator 2, it is the same as the originalPressurized airAs a1, it is discharged to the ventilation duct 3 and sent toward the pressure feed pipe 4 to circulate and move. After that, the vertical conveyance of the granular material b, the separation and removal of the powdery material c, and the collection and collection of the powdery material c are repeated similarly to the above.
[0070]
  In addition,Pressurized airIn the supply chamber 1,Pressurized airOutput from generator 2Pressurized airYou may provide the dust collection filter which lets a1 pass separately.
[0071]
  further,Pressurized airIn the upper side wall of the suction pipe 10,Pressurized airYou may make it form the slit 30 leading to the exterior so that the air quantity of a1 may become smaller (refer FIG. 6). in this case,Pressurized airFrom feeder 2Pressurized airThe air amount of a1 will be increased.
[0072]
  In the above embodiment, the pressure feed pipe 4 andPressurized airThe suction pipe 10 is located inside the pressure feed pipe 4.Pressurized airThe double structure (see FIGS. 1 and 4) provided with the suction pipe 10 has been described. From the decompression chamber 8 above the pressure feed pipe 4Pressurized airOf course, a side-by-side structure in which the suction pipe 10 is separated and hung from the side may be used (see FIG. 7).
[0073]
  Furthermore, in the first embodiment, structurally,Pressurized airAlthough the device in which the means and the recovery means are configured integrally has been described,Pressurized airGeneratePressurized airThe supply chamber 1 and the powder material collection chamber 11 for collecting the powder material c are connected to the pressure feed pipe 4,Pressurized airThe main body portion, that is, the main body unit 100 having the suction tube 10 and the decompression chamber 8 as main components may be separated.
[0074]
  Specifically, as shown in FIG.Pressurized airBuilt-in generator 2Pressurized airThe supply chamber 1 is integrated with a powder collection chamber 11 including a dust collection filter 12.Pressurized airThe collection unit 101 may be separated from the main unit 100. In the second embodiment, the annular member 16 has the above-mentioned structure.Pressurized airA guide body 40 is attached.
[0075]
  In the case of this second embodiment, below the main unit 100Pressurized airSince the recovery unit 101 does not exist,Pressurized airTo supply a1 to the pumping tube 4Pressurized airA storage chamber 104 is provided. Even in this second embodiment, similar to the above embodiment,Pressurized airGenerated by generator 2Pressurized airSince a1 circulates, in the above embodimentSome exhaust portsLike 5,Pressurized airA part is discharged to a1Some exhaust ports103 isPressurized airIt is provided at the bottom of the storage chamber 102. AndPressurized airFrom collection unit 101Pressurized aira1 isPressurized airThe vent line 104 is provided so as to be supplied to the storage chamber 104.Pressurized airIt is connected to the storage chamber 102.
[0076]
  On the contrary,Pressurized airOne end of a suction pipe 105 communicating with the powdery substance collection chamber 11 is directly connected to the suction pipe 10. The other end of the suction pipe 105 is connected to the powdery material collection chamber 11.
[0077]
  Pressurized airThe collection unit 101 may be installed in a room where the main unit 100 is installed. In consideration of noise and the convenience of cleaning the dust collection filter 12, it may be installed in a separate room from the room in which the main unit 100 is installed.
[0078]
  As yet another third embodiment, as shown in FIG.Pressurized airThe supply chamber 1 and the powdery material recovery chamber 11 constituting the recovery means may be formed separately.
[0079]
  In particular,Pressurized airBuilt-in generator 2Pressurized airInstead of the supply chamber 1, the compressor 200 that generates the pressurized air a1 or the first embodiment described above.Pressurized airIt is the structure which consists of a dust generator 203 provided with the generator simple substance and the air blower 202 which has the dust collection filter 201 and the ventilation fan 202a. The compressor 200 and the main unit 100 are connected to the main unit 100 by the ventilation pipe 104 as in the second embodiment.Pressurized airThe dust collector 203 communicates with the storage chamber 102 and is directly connected to the suction pipe 105.Pressurized airThe suction pipe 10 is communicated. In this embodiment,Pressurized airThe guide body is not used.
[0080]
  Thus, when using the compressor 200 and the dust collector 203, the installation place may be the same room as the main unit 100, or may be another room.
[0081]
  In each of the above embodiments, the volume of the decompression chamber 8 is increased by increasing the height or increasing the inner diameter of the decompression chamber 8 as described in the first embodiment (see FIGS. 8 and 8). In addition to increasing the degree of pressure reduction, a separation brush body 400 may be used instead of the separation plate 14 (shown in FIG. 10). The separating brush body 400 has a tip on the inner peripheral surface of an annular base member 401 having an outer diameter substantially equal to the inner diameter of the decompression chamber 8.Pressurized airIn this structure, a brush 402 having a length that substantially contacts the outer periphery of the suction tube 10 is implanted. In this separating brush body 400, each brush 402 is smaller than a predetermined interval, specifically, the outer diameter of the granule b, and at a sufficient interval for the powder c to pass therethrough. It is implanted in the base member 401.
[0082]
  Further, for example, a configuration in which a large number of oblique rectifying fins are arranged on the inner peripheral portion of the annular member 16 of the nozzle portion 6 may be used.
[0083]
  Furthermore, as shown in FIG. 11, it is attached to the lower part of the annular member 16 of the nozzle part 6.Pressurized airThe guide body 500 has a cylindrical portion 500b having a flange 500a at the upper end, and on the inner peripheral surface of the cylindrical portion 500b,Pressurized airThe belt-shaped spiral surface 500c for guiding a1 may be provided. In the figure, the back surface of the belt-like spiral surface 500c is shown with hatching,Pressurized airThe suction tube 10 is indicated by a wavy line. The belt-shaped spiral surface 500c has its outer peripheral edge fixed to the inner peripheral surface of the cylindrical portion 500b, and its inner peripheral edge isPressurized airThe suction pipe 10 is fixed to the outer peripheral surface.
[0084]
  If it is such a structure, it flowed into cylindrical part 500Pressurized aira1 is guided toward the nozzle portion 6 along the belt-like spiral surface 501. For this reason,Pressurized aira1 turns up spirally from the nozzle part 6 to the pumping pipe 4 and rises. in this way,Pressurized airAs a1 turns spirally and rises, the particles b rise while fluctuating, and therefore, the peeling or separation of the powder c attached to the particles b is promoted. Also,Pressurized airCompared to the case where a1 rises linearly without turning, the granular material bPressurized airThere is little damage that can be caused when it comes into contact with the outer peripheral surface of the suction tube 10.
[0085]
  In addition, in the inner peripheral surface of the pressure feed tube 4 and the double structurePressurized airDesirably, the outer peripheral surface of the suction tube 10, the inner surface of the decompression chamber 8, the separation plate 14, and the like are made of a material that can avoid damage to the granular material b. It is better to coat with synthetic resin. In particular, since the separation plate 14 may directly hit the granule b, it is desirable that the separation plate 14 be made of a synthetic resin that is thin and elastic.
[0086]
  Furthermore,Pressurized airWhen not turning a1Pressurized airIt is not necessary to attach the guide body to the annular member 16. The configuration in this case isPressurized airThe structure is the same as that of FIG. 1 in which the guide body is not shown.
[0087]
  In order to reduce the clogging of the dust collection filter due to powder,Pressurized airIt is desirable that a cylindrical collection box is detachably provided below the suction tube.
[0088]
  Specifically, for example, as shown in FIG.Pressurized airThe suction pipe 500 is extended to about the longitudinal center position of the powdery material collection chamber 11, the lower end 501 is formed to expand downward, and the collection box 600 is installed so as to surround the lower end 501. The collection box 600 has a bottomed cylindrical shape, and an upper edge portion thereof is obliquely bent inward so that the diameter of the opening 601 is increased.Pressurized airThe structure is such that the diameter is larger than the outer diameter of the suction tube 500 and smaller than the diameter of the bottom surface of the collection box 600. The inner diameter of the collection box 600 isPressurized airThe outer diameter of the lower end 501 of the suction pipe 500 is larger, and an annular gap 502 is formed between the lower end 501 and the inner peripheral surface of the collection box 600. The height position of the opening 601 isPressurized airAbove the lower end 501 of the suction pipe 500, the inner peripheral edge of the opening 601 andPressurized airAn annular gap 602 is formed between the outer surface of the suction tube 500.
[0089]
  In such a configuration, the atmosphere inside the collection box 600 moves toward the dust collection filter 12 via the gap 602.Pressurized airThe powdery substance c moved from the suction tube 500 to the powdery substance recovery chamber 11 is a large powdery substance c1 having a heavy weight, which is collected on the bottom surface of the collection box 500, and a small powdery substance having a light weight. c2 passes through the gap 502 and the gap 602 and reaches the dust collecting filter 12. Accordingly, since the amount of the small powdery material c2 collected by the dust collection filter 12 is reduced, even if the dust collection filter 12 is fine, the large powdery material c1 having a fine shape is not collected, so it is difficult to clog. Become.
[0090]
[Industrial applicability]
  As described above, according to the present invention, a compressed molded product, that is, a granule discharged from a powder compression molding machine that compresses powder and compresses it into a tablet or an electronic component can be vertically conveyed. It can be used in the industrial field for producing such granules.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a longitudinal front view showing a first embodiment of an apparatus used for carrying out a method of powder collection, vertical conveyance and dust collection according to the present invention.
FIG. 2 is a diagram of the embodiment shown in FIG.Some exhaust portsIt is an enlarged vertical sectional view showing the vicinity.
FIG. 3 is a diagram of the embodiment shown in FIG.Pressurized airIt is an enlarged vertical sectional view of a guide body.
4 is an enlarged longitudinal sectional front view showing the vicinity of a nozzle portion of the embodiment shown in FIG. 1. FIG.
FIG. 5 is an enlarged longitudinal front view showing the vicinity of the decompression chamber of the embodiment shown in FIG. 1;
FIG. 6 is a partial enlarged longitudinal sectional view showing an example in which a slit is formed in a pressure feeding pipe.
FIG. 7 is a longitudinal front view showing the vicinity of a decompression chamber in a modification of the first embodiment.
FIG. 8 is a longitudinal sectional front view showing a second embodiment of the apparatus used for carrying out the method of powder collection, vertical conveyance and dust collection according to the present invention.
FIG. 9 is a longitudinal sectional front view showing a third embodiment of the apparatus used for carrying out the method of powder removal, vertical conveyance and dust collection according to the present invention.
FIG. 10 is a perspective view showing a separating brush body applicable to each of the above embodiments.
FIG. 11 is applicable to the above embodiments.Pressurized airIt is an expanded vertical sectional view which shows the internal structure of a guide body.
FIG. 12 is an enlarged longitudinal sectional view showing a modification of the internal structure of the powdery material collection chamber.

Claims (11)

Utilizing the force of discharging air by a pressurized air generator, the force of sucking by a suction device, and the centrifugal force of discharging compressed air in a spiral shape, using a granular material and a powdery material that is lighter than the granular material. And raised to a predetermined position while spirally swirling with the pressurized air generated by the pressurized air generator,
Pressurize the compressed air at a predetermined position to separate the particles and powder based on their own weight differences,
A method for powder collection, vertical conveyance and dust collection, characterized in that the particles are collected by dropping by their own weight, and the powdered material is collected by suction with a suction machine separately from the particles.   2. The method of powder collection and vertical conveyance and dust collection according to claim 1, wherein the pressurized air generator and the suction device are one device.   By sucking the powdered material, the outside air is taken in from the particle feeding port for supplying the granular material with the powdered material and the particle taking-out port communicating with the outside, and the flow of the air is used to 3. The method of powder collection and vertical conveyance and dust collection according to claim 1 or 2, wherein the lifting force up to a predetermined position with the powdery material and the recovery power of the powdery material are improved.   A part of the compressed air generated by the pressurized air generator is exhausted to the outside, so that outside air is taken in from the granule feed port and granule take-out port, and the ascending force of the granule and powdery material to a predetermined position The sum of the amount by which a part of the pressurized air is discharged to the outside and the amount of outside air taken in from the granular material inlet and the granular material outlet is the same when improving the recovery of the powdery substance. The method of powder collection, vertical conveyance and dust collection as described. A hollow pumping tube;
A pressurized air supply chamber communicating with the pressure feed pipe at the lower end of the pressure feed pipe;
A pressure feeding means for pressure-feeding the granular material charged into the pressure feeding pipe from the pressure feeding pipe lower end side and the powdery material that is lighter than the granule upward by pressurized air flowing from the pressure feeding pipe lower end side;
A decompression chamber that is provided at the upper end of the pressure feed pipe and depressurizes the pressurized air flowing in from the pressure feed pipe to separate the particles and powder, and discharges only the granules from the outlet;
In the lower part of the decompression chamber, a granule outlet that communicates with the outside,
A pressurized air suction pipe communicating with the decompression chamber at the upper end of the pressure feeding pipe;
A collecting means for sucking the atmosphere in the pressurized air suction tube from the pressurized air suction tube and collecting only the powdery material in the decompression chamber;
A separation plate with small holes or slits in the decompression chamber;
A granular material feeding port for supplying granular material with powdery material to the lower end of the pressure feeding tube ,
An apparatus for dust collection and vertical conveyance and dust collection , comprising: a pressurized air guide body that is provided below the granule feeding port and that feeds the pressurized air to the pressure feeding pipe . A hollow pumping tube;
A pressurized air supply chamber communicating with the pressure feed pipe at the lower end of the pressure feed pipe;
A pressure feeding means for pressure-feeding the granular material charged into the pressure feeding pipe from the pressure feeding pipe lower end side and the powdery material that is lighter than the granule upward by pressurized air flowing from the pressure feeding pipe lower end side;
A decompression chamber that is provided at the upper end of the pressure feed pipe and depressurizes the pressurized air flowing in from the pressure feed pipe to separate the particles and powder, and discharges only the granules from the outlet;
In the lower part of the decompression chamber, a granule outlet that communicates with the outside,
A pressurized air suction pipe communicating with the decompression chamber at the upper end of the pressure feeding pipe;
A collecting means for sucking the atmosphere in the pressurized air suction pipe from the pressurized air suction pipe and collecting only the powdery substance in the decompression chamber;
A separation plate with small holes or slits in the decompression chamber;
A granular material feeding port for supplying granular material with powdery material to the lower end of the pressure feeding tube,
A ventilation duct for sending pressurized air generated by a pressurized air generator to a pressure feeding pipe;
Some exhaust ports with adjustable hole sizes in the middle of the ventilation duct,
In the vicinity of the boundary between the ventilation duct and the pumping pipe, a nozzle part that locally narrows the ventilation cross section,
Some exhaust vents have an adjustment lid that determines the amount of exhaust,
At the lower end of the pressurized air suction tube, a powdery substance collection chamber provided in communication with the pressurized air suction tube;
A dust collection filter for filtering the powder from the atmosphere in the powder collection chamber;
A device for dust collection, vertical conveyance and dust collection, which is equipped with an air intake port communicating with the dust collection filter. The apparatus for dust removal and vertical conveyance and dust collection according to claim 6 , further comprising a pressurized air guide body that swirls pressurized air and sends it into the pressure feeding pipe at a lower end of the pressure feeding pipe . The apparatus for powder collection and vertical conveyance and dust collection according to claim 5, 6 or 7, comprising a suction device for sucking the atmosphere in the powdery substance collection chamber through a dust collection filter .   9. The apparatus for powder collection and vertical conveyance and dust collection according to claim 5, 6, 7 or 8, wherein a double structure in which a pressurized air suction pipe is provided inside the pressure feed pipe. Rotate the pressurized air discharged from the pressure generator and send it to the pressure feed pipe.
A granular material containing powdery material is introduced into the pressure feeding tube from the granular material inlet, and both the pressurized air and the granular material with the powdery material are raised to a predetermined position to separate the powdery material from the granular material in the decompression chamber. , Drop the particles toward the particle outlet,
Pressurized air containing powdered material is sent to the lower end of the pressurized air suction pipe using the suction force generated by the pressurized air generator or suction machine, and after removing the powdered material with the dust collecting filter, it is again A method for dust removal, vertical conveyance and dust collection, characterized in that the compressed air is discharged as pressurized air through a pressurized air generator, and the pressurized air is circulated and moved. The powder removal and vertical conveyance of a granular material according to claim 1, 2, 3, 4 or 10, wherein the granular material and the powdery material are separated by installing a separating plate having a small hole or a slit in a decompression chamber. Cum collection method.

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