JP2006240764A - Granular material feeding device, and granular material carrying system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a granular material feeding device, and a granular material carrying system, capable of restricting deterioration of grain material carrying efficiency. <P>SOLUTION: This carrying system for carrying granular material such as metal dust is provided with a feeding device 17 to feed the granular material to a carrying passage. A hopper 22 is fixed to an upper end part of a rotary feeder 23 through a connecting cylinder 24, and metal dust charged into the hoper 22 is fed through the connecting cylinder 24 and the rotary feeder 23 into the carrying passage. Inside the connecting cylinder 24, a rotary plate 53 is provided to be rotatably supported through a support shaft 52 between a closure position to close a communication passage 24a and an opening position for opening the communication passage 24a. Between a circumferential edge of the rotary plate 53 and the closing position and a counter surface to it, a seal ring 55 is provided, so that the circumferential edge of the rotary plate 53 at the closure position and the counter surface to it are sealed to each other in the circumferential direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention provides, for example, a powder supply device for supplying powder particles such as metal scrap generated by processing a metal product using an NC lathe into a transport passage, and a powder transport device including the powder supply device. It is about the system.

  2. Description of the Related Art Conventionally, as a transportation system for powdered transportation goods such as moss, gas supply means for supplying transportation goods from a granular material supply device into a transportation passage and arranging the transportation goods on the upstream side of the transportation passage. It is known that the transported material is transported to a processing means (incinerator) disposed on the downstream side of the transport passage by mixing with transport gas supplied from (see, for example, Patent Document 1). The powder feeder in Patent Document 1 uses a rotary feeder. A rotary body that is driven to rotate by a drive motor is disposed inside the rotary feeder. The rotator has a plurality of blades that protrude radially at equal intervals. Then, the transported goods stored in the hopper or the like are sequentially charged into the partition chambers partitioned by a pair of adjacent blades, and the transported goods stored in the respective partition chambers are transported by the rotation of the rotating body. Are supplied sequentially.

  On the upper inner wall surface of the rotary feeder, a biting prevention member is disposed on the inner wall surface on the front side in the rotation direction of the blade plate. The lower end edge of the biting prevention member has a shape along the movement locus of the tip of the blade. Even if a package is put into the partition chamber in a piled-up state, a certain amount of the package is swept away to the rear side in the rotational direction by the biting prevention member, so that the tip of the blade plate and the inside of the rotary feeder The intrusion of the transport object between the wall surfaces is suppressed.

In the above conventional transportation system, since high-pressure transportation gas is supplied in order to ensure good transportation efficiency of the transported goods, it is necessary to improve the airtightness in the transportation passage. Therefore, in the powder and particle supply device of Patent Document 1, a gap between the tip (periphery) of the blades of the rotating body and the inner wall surface of the rotary feeder facing this is omitted or very small. The airtightness in the transport passage communicating with the inside of the rotary feeder is enhanced.
JP 2000-85968 A

  By the way, it is conceivable to transport metal scrap (metal chips) generated after metal processing, to which oil is attached, or whose shape is complicated and not uniform, by a transport gas pumped from the gas supply means. In such a case, in the above-mentioned conventional powder supply device (rotary feeder), the metal scrap firmly attached to the tip (periphery) of the blade plate via oil is about to be wiped off only by sliding with the biting prevention member. However, a sufficient effect cannot be obtained.

  In addition, in the conventional powder supply device (rotary feeder), in order to increase the airtightness in the transport passage and ensure good transport efficiency of the transported object, the tip (periphery) of the blade of the rotating body, There is no gap between the inner wall surface of the rotary feeder facing this, or it is extremely small. For this reason, if the rotating body rotates while the metal scrap remains attached to the tip (periphery) of the blade, the metal scrap slides on the inner wall surface of the rotary feeder. As a result, the inner wall surface of the rotary feeder is shaved by the metal scrap, and the shaved portion becomes a dent. And there existed a possibility that the airtightness in a transportation channel might fall through such a dent and by extension the transportation efficiency of a package could fall.

  This invention is made in view of such a conventional situation, The objective is providing the granular material supply apparatus and granular material transportation system which can suppress the fall of the transportation efficiency of a granular material. It is in.

  In order to achieve the above object, a powder and particle supply apparatus according to the first aspect of the present invention includes a hopper into which powder is charged, a rotary feeder provided below the hopper, and the rotary feeder. A rotating cylinder that is connected to the hopper and has a communication passage that communicates the inside of the two, and a rotary body that forms a plurality of partition chambers in the rotation direction by a plurality of blade plates is provided inside the rotary feeder. The movement trajectory of each of the partition chambers accompanying the rotation of the rotating body is made to correspond to the transport passage through which the transport gas is pumped, and the powder particles accommodated in the partition chamber based on the rotation of the rotating body are placed in the transport passage. In the granular material supply apparatus for supplying to the inside of the connecting cylinder, an opening / closing valve is provided in the connecting cylinder so as to be switched between a closed position for closing the communication path and an open position for opening the communication path. And it has the peripheral edge of the on-off valve in the closed position and the inner surface of the coupling tube and summarized in that are tightly.

  According to the above configuration, when the on-off valve rotates from the closed position to the open position in a state where the powder is stored in the hopper, the powder in the hopper is put into the partition chamber. And the granular material accommodated in the said partition chamber based on rotation of a rotary body is supplied in a transport channel, and is conveyed by the high voltage | pressure transport gas. At this time, the on-off valve is in the closed position, and its peripheral edge is in close contact with the inner surface of the connecting cylinder, so that the air tightness inside the rotary feeder, and thus the air tightness inside the transport passage communicating with the inside of the rotary feeder is secured. It becomes like this. Therefore, in the present invention, even if each partition chamber of the rotary feeder is not airtight, the airtightness in the transport passage is ensured by the on-off valve in the closed position. As a result, since the high-pressure property of the transport gas pumped into the transport passage is maintained, a decrease in the transport efficiency of the granular material is suitably suppressed.

  According to a second aspect of the present invention, there is provided the granular material supply device according to the first aspect, wherein the compressed air when the compressed air is blown against the on-off valve is supplied to the connecting cylinder in the communication passage. The gist of the present invention is that the introduction port is opened, and the introduction port is provided above the on-off valve.

  According to the above configuration, by blowing compressed air from above on the on-off valve, powder particles that remain attached to the on-off valve without being introduced into the partition chamber, in particular, powder that remains on the periphery of the on-off valve. Granules are blown away. Thereby, the granular material hardly enters between the peripheral edge of the on-off valve in the closed position and the opposing surface (the inner surface of the connecting cylinder facing the peripheral edge of the on-off valve), and the good adhesion between the two is obtained. Will be secured. Therefore, the airtightness inside the rotary feeder, and hence the airtightness in the transport passage, can be easily secured.

  According to a third aspect of the present invention, there is provided the powder supply apparatus according to the second aspect, wherein the compression of the on-off valve when the on-off valve rotates from the open position to the closed position. The gist is to blow air.

According to the above configuration, it is possible to blow away the granular material that is not put into the partition chamber and remains attached to the on-off valve until the rotating plate reaches the closed position. Therefore, when the on-off valve is in the closed position, the granular material is removed from the on-off valve (periphery of the on-off valve), and good adhesion between the on-off valve periphery and the inner surface of the connecting cylinder is ensured. Cheap.

  According to a fourth aspect of the present invention, there is provided the powder supply apparatus according to any one of the first to third aspects, wherein between the on-off valve in the closed position and the inner surface of the connecting cylinder. The gist is that a seal member is provided.

  According to the above configuration, when the on-off valve is in the closed position, the seal member is interposed between the on-off valve and the inner surface of the connecting cylinder, so that the two are sealed. Therefore, the airtightness inside the rotary feeder, and consequently the airtightness in the transport passage, is enhanced, and it becomes easy to maintain good transport efficiency of the granular material.

  A granular material transport system according to a fifth aspect of the invention includes the granular material supply device according to any one of the first to fourth aspects, and a gas flow for transporting the granular material in the transport passage. Gas flow providing means provided therein, processing means disposed on the downstream side of the powder supply device, and performing predetermined processing on the powder transported by the transport gas, and predetermined by the processing means And a storage means for storing the granular material subjected to the above process.

  According to the said structure, the granular material thrown into the hopper is supplied in a transport passage through a rotary feeder. Then, the granular material is transported to the downstream side (processing means) by the gas flow provided by the gas flow providing means, subjected to predetermined processing by the processing means, and then stored in the storage means.

  According to the granular material supply apparatus and the granular material transport system of the present invention, it is possible to suppress a decrease in the transport efficiency of the granular material.

Hereinafter, a granular material transport system equipped with a granular material supply device will be described with reference to the drawings.
FIG. 1 schematically shows the overall configuration of a particulate transport system that transports a particulate mixed with a transport gas. In the present embodiment, a transport system that transports metal scrap (metal chips) generated by processing a metal product using an NC lathe 11 as the powder particles will be described. Moisture, oil, etc. are attached to this kind of metal scrap. The metal scrap is hard and has a complicated shape and is not uniform. For example, the metal scrap is spirally spirally mixed or includes a length of several millimeters to several tens of millimeters. Examples of such metal scrap include iron, cast iron, cast steel, and aluminum.

  In the transport system of the present embodiment, two transport passages 12 and 13 (first and second transport passages 12 and 13) are arranged in parallel. A common supply blower 14 (gas flow providing means) is disposed on the most upstream side of the transport passages 12 and 13. The supply blower 14 is a supply source of the transport gas (gas flow). Further, a switching valve 15 is provided in the vicinity of the supply blower 14 in each of the first and second transport passages 12 and 13 to determine which transport passage 12 and 13 the transport gas is supplied to. It is selected and confirmed by opening and closing the switching valve 15.

  In the middle of the first and second transport passages 12 and 13 and on the downstream side of the switching valve 15, a granular material supply device (hereinafter simply referred to as supply) for supplying metal scrap into the transport passages 12 and 13. Each of which is referred to as device 17). In the present embodiment, the transport passages 12 and 13 are divided into the upstream transport pipe A and the downstream transport pipe B with reference to the arrangement position of the supply device 17.

  Disposed above each supply device 17 is a discharge port 18a of a conveyor 18 that conveys metal scrap generated by the NC lathe 11 to a hopper 22 described later. Further, on the most downstream side of the first and second transport passages 12 and 13, a separation device 19 is disposed as a processing means for processing the metal scrap that has been transported. The separation device 19 includes a bag filter (not shown) inside, and moisture, oil, and the like attached to the metal scrap are separated through the bag filter and separately collected. In addition, although it is the structure of the said conveyor 18, it is possible to employ | adopt conveyor apparatuses, such as a screw conveyor and a belt conveyor, and throwing into the hopper 22 of the metal waste by the operator is also considered depending on the case.

  Below each separation device 19, a storage tank 20 is disposed as a storage means. In the storage tank 20, metal scraps from which moisture, oil, and the like have been separated and removed by the separation device 19 are stored.

  In FIG. 1, the separation device and the storage tank disposed in the second transportation passage 13 are omitted, but actually, the separation device 19 and the storage tank 20 similar to those disposed in the first transportation passage 12 are provided. It is arranged.

Next, the supply device 17 will be described. Here, the supply device 17 provided in the first transport passage 12 will be described.
As shown in FIG. 2, the supply device 17 includes a hopper 22 into which metal scrap conveyed by a conveyor is charged, a rotary feeder 23 provided below the hopper 22, and the rotary feeder 23 connected to the hopper 22. The connecting cylinder 24 is provided. That is, the supply device 17 is configured such that the hopper 22 is fixed to the upper end portion of the rotary feeder 23 via the connecting cylinder 24, and the metal waste thrown into the hopper 22 is connected to the connecting cylinder 24 and the rotary feeder 23. And is supplied into the first transport passage 12. Hereinafter, the rotary feeder 23, the connecting cylinder 24, and the hopper 22 will be sequentially described.

  The rotary feeder 23 includes a casing body 30 having a substantially horizontal cylindrical shape, and side plates 31 and 32 having disk shapes fixed to the left and right ends of the casing body 30 by welding in FIG. The casing main body 30 has a perfect circular inner peripheral surface, and the casing main body 30 and the side plates 31 and 32 constitute a bottomed and covered cylindrical casing 33. The casing 33 is integrally formed with an intake cylinder portion 33a on the upper side thereof.

  A rotating shaft 40 connected to a driving device (such as a motor) (not shown) is rotatably supported at the approximate center of the casing 33. A rotating body 41 that is disposed in the casing 33 and transfers the metal scrap is mounted on the rotating shaft 40. The rotating body 41 receives the rotational power of the driving device transmitted from the rotating shaft 40 and has a predetermined rotational speed (around 20 rotations per minute) in a predetermined direction (indicated by the arrow Q direction (clockwise direction shown in FIG. 2)). It is designed to transfer metal scraps by rotating at.

  Attachment plates 42a and 42b as a pair of attachment members having a disk shape are fixed to the rotating shaft 40 by welding (see FIG. 3). A rotor 43 having a horizontal cylindrical shape is fixed by welding to the outer peripheral edges of the mounting plates 42a and 42b. A blade plate 44 having a substantially L-shaped cross section extending along the axial direction of the rotary shaft 40 is attached to the outer peripheral surface of the rotor 43 in the circumferential direction. A plurality of blades 44 are attached at a predetermined equal pitch.

  The tip of the vane plate 44 is separated from the facing surface (the inner surface of the casing body 30) facing the tip, and a gap S is provided between them. Further, both side edges of the blade plate 44 are also separated from the inner side surfaces of the side plates 31 and 32, and a similar gap S is provided between each side edge and the side plates 31 and 32 (see FIG. 3). ). On the outer circumferential surface of the rotor 43, a plurality of partition chambers R are defined in the rotational direction (circumferential direction) of the rotor 43 (rotating body 41) by blade blades 44 adjacent to each other along the circumferential direction.

  As shown in FIG. 3, a transport gas supply port 31 a is formed in the lower portion of the side plate 31. The upstream transport pipe A is joined and fixed to the outer surface of the side plate 31 corresponding to the supply port 31a, and the transport gas supplied from the supply blower 14 is sent into the casing 33 through the upstream transport pipe A. It is supposed to be. On the other hand, at the lower part of the side plate 32, a discharge port 32a for discharging transport gas mixed with metal scraps in the casing 33 is formed. The downstream transport pipe B is bonded and fixed to the outer surface of the side plate 32 corresponding to the discharge port 32a.

  As the rotating body 41 rotates, each partition chamber R that rotates and moves on a certain movement trajectory is sequentially moved to a position corresponding to the first transport passage 12 (hereinafter referred to as “discharge position”). As shown in FIG. Accordingly, each of the partition chambers R stores metal scrap when moving through a position (hereinafter referred to as “supply position”) corresponding to the most downstream position (lowermost position) of the communication passage 24a, and the discharge position. It is transported toward.

  In addition, the transport gas forcibly flows into the partition chamber R that has reached the discharge position, so that the metal scrap is discharged to the downstream transport pipe B side in a state of being mixed with the transport gas. Then, the empty partition chamber (empty partition chamber) R after the metal scrap is supplied into the first transport passage 12 is transferred toward the supply position.

  As shown in FIG.2 and FIG.3, the lower end of the connection cylinder 24 is connected with the said intake cylinder part 33a. The connecting cylinder 24 is configured by connecting three cylinders in the vertical direction. A communication passage 24 a that communicates the inside of the rotary feeder 23 (casing 33) and the inside of the hopper 22 is provided inside the connecting cylinder 24.

  The inner diameter (passage diameter) of the communication passage 24a is set so that the downstream side is larger than the upstream side with a rotation plate 53 described later as a boundary. That is, the communication cross-sectional area of the connecting cylinder 24 on the downstream side of the portion where the rotating plate 53 is provided is set to be larger than the communication cross-sectional area of the connecting tube 24 where the rotating plate 53 is provided. Yes. By this setting, the metal scrap supplied to the rotary feeder 23 via the rotating plate 53 comes into contact with the blade plate 44 of the rotary feeder 23 over a wider range. Therefore, the metal scrap supplied to the rotary feeder 23 side is accommodated in each partition chamber R of the rotary feeder 23 while being stirred by the blade plate 44. In addition, although it is the blade 44 of the rotary feeder 23, if it is comprised so that the rotation locus | trajectory of the front-end | tip part of this blade 44 may jump out to the communicating path 24a side, the stirring effect mentioned above will be certain. Become.

  A support shaft 52 connected to the actuator 51 is rotatably supported by the connecting cylinder 24 at a substantially central portion in the axial direction (see FIG. 3). A rotating plate 53 as an on-off valve is fixed to the outer periphery of the support shaft 52 in the connecting cylinder 24. Then, when the support shaft 52 and the rotating plate 53 are reciprocally rotated by the actuator 51 that is operated by a command from the control unit C, the rotating plate 53 is opened to connect the upstream side and the downstream side of the communication path 24a. The position is switched between a position (see a solid line in FIG. 5) and a closed position (see a two-dot chain line in FIG. 5) that blocks the upstream side and the downstream side of the communication path 24a. The control unit C commands the operation of the actuator 51 at predetermined time intervals set in the control unit C, and the supply timing of the metal scrap to the rotary feeder 23 is determined by the command. Although the predetermined time interval is set in the control unit C, it is set in consideration of the properties of the transported goods, the processing capacity of the rotary feeder, and the like.

  When the rotating plate 53 is in the closed position, the communication path 24a is closed by the rotating plate 53, so that the supply of the metal scrap thrown into the hopper 22 to the rotary feeder 23 is restricted. On the other hand, when the rotating plate 53 is in the open position, the communication path 24a is opened, so that the metal scrap introduced into the hopper 22 is supplied to the rotary feeder 23 through the communication path 24a.

  On the communication path 24a on the downstream side of the rotating plate 53, a detection unit 24b that detects the amount of metal scrap supplied to the communication path 24a is provided. The detection unit 24 b is disposed from the wall surface of the connecting cylinder 24 toward the communication path 24 a and is used to control the amount of metal scrap supplied to the rotary feeder 23. The control unit C commands the operation of the actuator 51 based on the detection signal from the detection unit 24b input to the control unit C, and the rotation plate 53 reciprocates by the command.

  Further, a seal ring 55 as a seal member is provided on the periphery of the rotating plate 53 by adhesion or the like. The seal ring 55 is provided in an annular shape so as to surround the periphery of the rotating plate 53 (see FIG. 4), and is sandwiched between the periphery of the rotating plate 53 in the closed position and its opposing surface. It is designed to be compressed. The seal ring 55 seals between the peripheral edge of the rotating plate 53 in the closed position and the opposing surface (the inner surface of the connecting cylinder 24 facing the peripheral edge) in the circumferential direction. Yes.

  The upper part of the connecting cylinder 24, that is, the upper part of the connecting cylinder 24 located above the rotating plate 53 (upstream side from the movement of the metal scrap) has a cylindrical shape extending in a direction perpendicular to the axis of the connecting cylinder 24. An introduction cylinder portion 57 is projected. A plurality of (four in the present embodiment) introduction cylinder portions 57 are provided at equal intervals on the outer periphery of the connecting cylinder 24 so as not to correspond to the axial direction of the support shaft 52 (arrangement configuration of the introduction cylinder portion 57). 4 is correct, and FIG. 2 and FIG. 3 are cross-sectional views for convenience of explanation. Inside each introduction cylinder portion 57, an introduction port 57a that communicates the inside and outside of the connection cylinder 24 is provided. Then, compressed air is supplied to the inside of the connecting cylinder 24 (communication passage 24a) from each air inlet 57a from an air supply device 59 that operates according to a command from the controller C. In the present embodiment, when the rotating plate 53 rotates from the open position to the closed position, the compressed air is controlled to be supplied to the inside of the connecting cylinder 24 (communication path 24a). The control unit C also controls the supply timing of compressed air, the wind speed, the flow rate, etc., and all of these can be changed.

  A hopper 22 is fixed to the upper portion of the connecting cylinder 24. The hopper 22 has a funnel shape, and is disposed with its opening facing the lower side of the discharge port 18 a of the conveyor 18. The lower end portion of the hopper 22 is inserted into the upper portion of the connecting cylinder 24. Further, between the hopper lower end portion 22a positioned below the introduction port 57a and the inner surface of the connection tube 24 opposed thereto, compressed air introduced into the connection tube 24 through the introduction port 57a is downward. A guide path 60 is provided to guide the vehicle (see FIG. 5).

  The hopper 22 is provided with two openings 22b on the side wall thereof along the axial direction of the support shaft 52 (see FIG. 4), and on the inner surface of the side wall of the hopper 22 so as to correspond to the opening 22b, A half-cylinder wall 22d is provided so as to constitute a ventilation passage 22c directed to 22a. The semi-cylindrical wall 22d and the side wall inner surface of the hopper 22 constitute an air passage 22c, and compressed air is provided from the air supply device 59 toward the upper end of the rotating plate 53 in the open position through the air passage 22c. It has become so. The compressed air supply timing through the air passage 22c is the same as the compressed air supply timing through the introduction port 57a described above, and the supply timing, wind speed, flow rate, and the like are controlled by the control unit C. It is. In the present embodiment, the air passage 22c is provided at two locations with respect to the hopper 22, but may be changed so as to be provided at one location or three or more locations. Also, the supply timing of compressed air can be changed.

Next, the aspect which transports metal waste using the supply apparatus 17 comprised in this way is demonstrated. Here, a mode in which the metal scrap is transported through the first transport passage 12 will be described.
The metal scrap generated by the metal processing using the NC lathe 11 is conveyed by the conveyor 18 and put into the hopper 22 through the discharge port 18a. At this time, the rotating plate 53 in the connecting cylinder 24 is in a closed position for closing the communication path 24 a, so that the metal scrap thrown into the hopper 22 is temporarily stored on the rotating plate 53. When the predetermined time interval set in the control unit C is reached, the actuator 51 rotates the rotating plate 53 to the open position to open the communication path 24a, and the metal scrap in the hopper 22 is moved to the supply position. It is thrown into the partition room R that has reached.

  Thereafter, when the detection unit 24b detects that a predetermined amount of metal scrap has been thrown into the rotary feeder 23 side, the control unit C rotates the rotating plate 53 from the open position to the closed position and closes the communication path 24a. The actuator 51 is controlled as described above. Metal scraps adhering to the rotating plate 53 are wiped off by the rotation of the rotating plate 53 and put into the partition chamber R. However, depending on the type of metal scrap, it may continue to adhere to the rotating plate 53, and the rotating plate 53 may reach the closed position as it is. Therefore, in the present embodiment, when the rotating plate 53 rotates from the open position to the closed position, the compressed air supplied from the air supply device 59 is introduced into the connecting cylinder 24 through each inlet 57a. . Then, the compressed air introduced into the connecting cylinder 24 through each introduction port 57a is guided downward through the guide path 60, and blown from above to the peripheral portion of the rotating plate 53 (see FIG. 5). Similarly to the introduction of the compressed air through the introduction port 57a, the compressed air is introduced through the air passage 22c, and the introduced compressed air is blown toward the vicinity of the upper end of the rotating plate 53 in the open position. .

  In this embodiment, since the directivity of the compressed air is enhanced by the guide path 60, the compressed air can be intensively blown against the peripheral edge of the rotating plate 53. As a result, when the metal scrap that is not thrown into the partition chamber R and remains attached to the periphery (seal ring 55) of the rotating plate 53 is reliably blown off by the compressed air, the rotating plate 53 reaches the closed position. The metal waste adhering to the peripheral edge (seal ring 55) is removed. For this reason, metal scrap hardly enters between the peripheral edge (seal ring 55) of the rotating plate 53 in the closed position and the opposing surface thereof, and the gap between the peripheral edge of the rotating plate 53 and the opposing surface thereof. Good sealing performance is ensured.

  Now, when metal scrap is thrown into the partition chamber R and the rotating plate 53 is placed in the closed position, the switching valve 15 is opened (in the embodiment of FIG. Both of the side switching valves 85 are opened), and the transport gas is supplied from the supply blower 14. Then, when the rotary feeder 23 is operated and the rotating body 41 is rotated, the metal scrap is transferred toward the discharge position. At this time, metal scrap may adhere to the tip (periphery) of the blade plate 44, or the rotating body 41 may rotate in a state in which long metal chips protrude outward from the blade plate movement locus L. Therefore, in the present embodiment, the metal scrap attached to the tip (periphery) of the blade plate 44 or the long metal scrap does not mesh between the tip (periphery) of the blade plate 44 and the facing surface thereof. A wide gap S that can be configured as described above is provided. Therefore, when the rotating body 41 rotates, the above-mentioned hard metal scrap hardly slides on the inner surface of the casing body 30, and there is no inconvenience that the rotational resistance of the rotating body 41 increases.

  When the partition chamber R reaches the discharge position, the transport gas that has passed through the upstream transport pipe A is pumped into the partition chamber R. Then, the metal scrap is forcibly transported to the downstream transport pipe B side by the transport gas. At this time, the rotating plate 53 is in the closed position, and the space between the peripheral edge and the opposed surface is firmly sealed, so that the airtightness in the casing body 30 is enhanced. And the airtightness in the 1st transport path 12 connected in this casing main body 30 is also improved. For this reason, the high-pressure property of the transport gas pumped into the first transport passage 12 is maintained, and the metal scrap can be transported efficiently by such a high-pressure transport gas.

  The metal scrap transported to the downstream transport pipe B side is supplied into the separation device 19. At this time, moisture, oil, etc. present in the transport passage 12 are also transported into the separation device 19. A predetermined treatment is applied to the metal scrap. That is, moisture, oil, and the like attached to the metal scrap are separated from the metal scrap by the bag filter in the separation device 19. The separated moisture, oil, etc. are collected in a separate collection tank (not shown) together with the moisture, oil, etc. transported from the inside of the transport passage 12. And the metal scrap from which moisture, oil, etc. were removed is stored in the storage tank 20 until it is conveyed by the mixer truck.

The effects exhibited by the above embodiment will be described below.
In the present embodiment, when the metal scrap is transported downstream by the transport gas, the rotation plate 53 is disposed at the closed position. At this time, the periphery of the rotating plate 53 is in close contact with the inner surface of the connecting cylinder 24, thereby ensuring the airtightness inside the rotary feeder 23, and thus the airtightness inside the transport passages 12 and 13 communicating with the inside of the rotary feeder 23. Will come to be. As a result, since the high-pressure property of the transport gas pumped into the transport passages 12 and 13 is maintained, good transport efficiency of metal scrap can be ensured by such a high-pressure transport gas.

  -Compressed air is introduced into the connecting cylinder 24 through the introduction port 57 a, and the compressed air is blown to the peripheral portion of the rotating plate 53. This compressed air removes metal debris adhering to the peripheral edge (seal ring 55) of the rotating plate 53, so that the peripheral edge (seal ring 55) of the rotating plate 53 in the closed position and the facing surface thereof are removed. There is almost no metal debris intruding into the film, and good adhesion between the two is ensured. Therefore, the airtightness in the transport passages 12 and 13 can be easily ensured.

  When the rotating plate 53 rotates from the open position to the closed position, the compressed plate is blown against the peripheral edge of the rotating plate 53 until the rotating plate 53 reaches the closed position. Metal scraps still attached to the periphery (seal ring 55) of the rotating plate 53 are blown away. Therefore, when the rotating plate 53 is in the closed position, the metal debris is removed from the rotating plate 53 (periphery of the rotating plate 53), and the good condition between the periphery of the rotating plate 53 and the opposing surface thereof. Is easy to secure. Therefore, the airtightness in the transport passages 12 and 13 can be more easily ensured.

  When the rotating plate 53 is in the closed position, a seal ring 55 is interposed between the peripheral edge of the rotating plate 53 and its opposing surface, and the two are sealed. Therefore, the airtightness in the transport passages 12 and 13 is improved, and the transport efficiency of metal scrap can be improved.

  Since the tip of the blade plate 44 and the facing surface are separated from each other, even if the rotating body 41 is rotated while the metal scrap remains attached to the tip of the blade plate 44, the metal scrap is not removed from the casing body 30. There is little possibility of sliding on the inner surface. For this reason, the sliding resistance between the blade plate 44 and the casing body 30 does not increase, and the inconvenience that the rotational resistance of the rotating body 41 increases can be avoided. Further, it is possible to prevent the peripheral edge of the blade 44 and the inner surface of the casing body 30 from being worn due to metal scraps being caught between the rotating body 41 and the casing body 30.

  In the present embodiment, since the directivity of the compressed air is enhanced by the guide path 60, the compressed air can be intensively blown against the peripheral edge of the rotating plate 53. As a result, it is possible to effectively remove metal debris adhering to the peripheral edge (seal ring 55) of the rotating plate 53, which is a factor of reducing the adhesion between the peripheral edge of the rotating plate 53 and the facing surface thereof. it can.

  -When the rotating plate 53 rotates from the open position to the closed position, the metal near the upper end of the rotating plate 53 is blown against the upper end of the rotating plate 53 through the air passage 22c. Scrap can be smoothly introduced to the connecting cylinder 24 side. In the case of the present embodiment, there is a possibility that oil or moisture may be attached to the metal scrap, and as a result, it may be attached to the vicinity of the upper end of the rotating plate 53, but compressed air via the air passage 22 c is considered. , The metal scraps are blown off and smoothly fed to the connecting cylinder 24 side.

In addition, this embodiment can also be changed and embodied as follows.
-In this embodiment, although the transport system which conveys a metal scrap as a granular material was employ | adopted, as this granular material, it is not restricted to a metal scrap. That is, you may employ | adopt the transport system which transports pulverized bodies, such as a piece of glass, a plastics, and a board material, sawdust, finely crushed vinyl, etc., powder, such as cement and wood powder. For example, in a transportation system for transporting sawdust and wood powder, an incinerator is disposed as the processing means. In the transport system for transporting cement, a mixer machine is disposed as the processing means.

  -A transportation system including a suction blower may be used instead of the supply blower. That is, as shown in FIG. 6, in this transportation system, a plurality of transportation passages 71 to 73 (three in the figure) are arranged in parallel. A supply device 17 is disposed on the most upstream side of each of the transport passages 71 to 73. In each of the transport passages 71 to 73, a switching valve 15 is provided in the vicinity of the supply device 17. Further, a common suction blower 75 (gas flow providing means) is disposed on the most downstream side of each of the transport passages 71 to 73. In this transport system, the metal scraps supplied into the transport passages 71 to 73 by the respective supply devices 17 are sucked by the suction blower 75 and are transported to the downstream side of the negative pressure transport passages 71 to 73. The Then, the metal scrap is stored in the storage tank 20 after being subjected to the predetermined processing in the separation device 19. In this transportation system, since a certain amount of metal scrap can be stably supplied into the respective transport passages 71 to 73 by the respective supply devices 17, suction unevenness occurs in each of the transport passages 71 to 73. There is nothing, and metal scrap can be transported efficiently. Note that each component operates in the transport system using the suction blower 75 as in this embodiment. For example, the operation of the switching valve 15 opens and closes similarly to the switching valve 15 in the present embodiment (the embodiment of FIG. 1).

  Further, in the above transport system, the common suction blower 75 is disposed in each of the transport passages 71 to 73, but this is changed to a configuration in which the suction blower 75 is disposed on the most downstream side of each of the transport passages 71 to 73. Also good. In this case, the switching valve 15 of each of the transport passages 71 to 73 can be omitted.

  In the present embodiment, the separation device 19 is provided for each of the transport passages 12 and 13, but a configuration in which the separation device 19 is common may be employed. That is, as shown in FIG. 7, in this transportation system, a plurality of transportation passages 81 to 83 (three in the figure) are arranged in parallel. A common supply blower 14 is disposed on the most upstream side of each of the transport passages 81 to 83, and a common separation device 19 is disposed on the most downstream side. Further, upstream switching valves 84 are provided on the respective transport passages 81 to 83 and in the vicinity of the supply blower 14. On the other hand, downstream switching valves 85 are provided on the transport passages 81 to 83 and downstream of the supply device 17. When the metal scrap is supplied from the supply devices 17 into the transport passages 81 to 83, both the upstream side switching valve 84 and the downstream side switching valve 85 are closed. Further, for example, when metal scrap is introduced into one of the transport passages 81 to 83, both the upstream side switching valve 84 and the downstream side switching valve 85 of the passage are opened, Both the upstream side switching valve 84 and the downstream side switching valve 85 of the passage are closed.

  In the present embodiment, the rotating plate 53 is employed as the on-off valve. However, as long as the communication state of the connecting cylinder 24 can be opened or closed, this may be changed as appropriate. For example, a slide gate 81 as shown in FIG. 8 can be employed as the on-off valve. In the slide gate 81, a flat slide plate 83 is reciprocated relative to the connecting cylinder 24 by a driving force from the cylinder 82. The slide plate 83 includes a closing portion 83 a that closes the connecting cylinder 24 and an opening 83 b that opens the connecting cylinder 24, and the closing portion 83 a or opening to the connecting cylinder 24 by the driving force of the cylinder 82. 83b is arranged. A seal ring 84 is provided on the inner peripheral surface of the connecting cylinder 24 as a seal member that is in sliding contact with the upper and lower surfaces of the slide plate 83 (either the upper surface side or the lower surface side of the slide plate 83 may be used). Such a configuration of the slide gate 81 can also function as an on-off valve in the same manner as the rotating plate 53 of the present embodiment. In addition, although the following modification demonstrates the rotation board 53, it cannot be overemphasized that the rotation board 53 can be substituted to the slide gate 81. FIG.

  A crusher serving as a crushing unit that crushes metal scraps may be provided downstream of the conveyor 18 and upstream of the rotating plate 53. When comprised in this way, the metal scrap crushed to the appropriate magnitude | size by the crusher will be supplied to the inside of the rotary feeder 23. FIG. According to this transportation system, it is possible to prevent metal dust from being caught between the connecting cylinder 24 and the rotating plate 53, or between the casing body 30 and the rotating body 41, etc. Since it is possible to crush metal scraps that are heavy with a scale into an appropriate size and reduce the size and weight thereof, the metal scraps can be transported easily and reliably.

  In the present embodiment, the seal ring 55 is bonded to the periphery of the rotating plate 53. However, the seal ring 55 is provided on the opposing surface (the inner surface of the connecting cylinder 24) of the periphery of the rotating plate 53 in the closed position. May be. Further, a seal ring may be provided on both the peripheral edge of the rotating plate 53 and the inner surface of the connecting cylinder 24. If the airtightness in the transport passages 12 and 13 is ensured, the seal ring 55 is provided. May be omitted. In this case, it is preferable that the peripheral edge of the rotating plate 53 in the closed position and the opposing surface (the inner surface of the connecting cylinder 24) are in close contact with each other.

  In the present embodiment, a configuration is adopted in which compressed air is blown against the rotating plate 53 when the rotating plate 53 rotates from the open position to the closed position, but the timing of blowing the compressed air is limited to this. It is not done. For example, a configuration may be employed in which compressed air is blown against the rotating plate 53 when the rotating plate 53 rotates from the closed position to the open position, or when the rotating plate 53 is in the open position.

  The passage configuration of the compressed air supplied toward the rotating plate 53 is not limited to the configuration of the present embodiment, and various modes can be considered. First, the number of introduction cylinders 57 is not limited to four, and may be less than four or five or more. In this case, when three or more introduction cylinder portions 57 are provided, the introduction cylinder portions 57 are provided at equal intervals in order to blow the compressed air evenly on the peripheral edge of the rotating plate 53. preferable. Second, in the present embodiment, a configuration in which the introduction cylinder portion 57 (introduction port 57a) is provided above the rotation plate 53 is adopted, but this may be changed to a configuration in which the introduction cylinder portion 57 (introduction port 57a) is provided below the rotation plate 53. . In this case, compressed air is blown against the rotating plate 53 from below. Third, instead of omitting the introduction tube portion 57, a configuration in which an introduction port 57a is formed in the connection tube 24 may be employed. Fourthly, in this embodiment, the guide path 60 for guiding the compressed air downward is provided by the hopper lower end portion 22a and the inner surface of the connecting cylinder 24 opposed to the hopper lower end portion 22a. For example, the cylindrical portion 57 may be extended so that the lower end portion of the introducing cylindrical portion 57 is directed to the rotating plate 53. Fifth, in the present embodiment, the introduction port 57 a is arranged without corresponding to the axial direction of the support shaft 52, but this may be adapted to correspond to the axial direction of the support shaft 52.

  -In this embodiment, the front-end | tip of the blade board 44 is spaced apart from the opposing surface (inner surface of the casing main body 30) facing this front-end | tip, and the both-sides edge of the blade board 44 is also spaced apart from the inner surface of the side plates 31 and 32. By doing so, a gap S is provided between the blade 44 and the casing body 30, but the gap S may be eliminated. Depending on the property (for example, soft material) of the transported material, the airtightness inside the rotary feeder 23 may be further enhanced by making the blades 44 contact the inner surface of the casing body 30.

  -Although the two transport passages 12 and 13 were provided in the transport system of this embodiment, the structure provided with three or more may be employ | adopted. In such a configuration, various types of metal scrap (for example, iron, cast iron, cast steel, aluminum, etc.) can be transported by type, which is efficient. In addition, a configuration with one transport passage may be employed. In this case, the switching valve 15 can be omitted.

  -In this embodiment, although the connection cylinder 24 was comprised from three cylinders, you may comprise this from two or less or four or more cylinders. Moreover, you may employ | adopt the structure which provides this connection cylinder 24 in the lower end part of the hopper 22 integrally.

Further, the technical idea that can be grasped from the embodiment will be described below.
The tip of the blade is spaced from the inner surface of the rotary feeder facing the tip, and a gap is provided between the tip of the blade and the inner surface of the rotary feeder facing the tip. The granular material supply apparatus characterized by the above-mentioned. In such a configuration, even if the rotating body rotates with the powder particles attached to the tips of the blades, there is little possibility that the powder particles slide on the inner surface of the rotary feeder. There is no inconvenience that the rotational resistance increases.

  -A granular material supply apparatus, comprising a crushing means for crushing the granular material upstream of the rotating plate. When it is set as such a structure, a granular material can be conveyed easily and reliably.

  The communication cross-sectional area of the connecting cylinder downstream from the part where the on-off valve is provided is set to be larger than the communication cross-sectional area of the connecting cylinder at the part where the on-off valve is provided. Powder body supply device.

Schematic which shows the granular material transport system of this embodiment. The front sectional view showing the granular material supply device of this embodiment. The sectional side view which shows the same granular material supply apparatus. 4-4 sectional drawing in FIG. The expanded sectional view which shows the state at the time of spraying compressed air on a rotation board. Schematic which shows the granular material conveyance system of another example. Schematic which shows the granular material conveyance system of another example. The sectional side view which shows the on-off valve of another example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12, 13 ... Transport channel | path, 14 ... Supply blower as gas flow provision means, 17 ... Granule supply apparatus, 19 ... Separation apparatus as processing means, 20 ... Storage tank as storage means, 22 ... Hopper, 23 ... Rotary feeder, 24 ... Connecting cylinder, 24a ... Communication path, 41 ... Rotating body, 44 ... Blade plate, 52 ... Support shaft, 53 ... Rotary plate as opening / closing valve, 55 ... Seal ring as seal member, 57a ... Introduction Mouth, 75 ... Suction blower as gas flow providing means, R ... Partition room.

Claims (5)

A hopper into which powder particles are charged; a rotary feeder provided below the hopper; and a connecting cylinder that connects the rotary feeder to the hopper and has a communication passage that communicates the inside of the rotary feeder. A rotating body that partitions and forms a plurality of partition chambers in the rotation direction by a plurality of blades is provided inside, and a transport passage through which transport gas is pumped along the movement trajectory of each partition chamber as the rotating body rotates In the granular material supply device for supplying the granular material accommodated in the partition chamber into the transport passage based on the rotation of the rotating body,
Inside the connecting cylinder, there is provided an on-off valve that is switched between two positions, a closed position that closes the communication path and an open position that opens the communication path,
The granular material supply apparatus according to claim 1, wherein a peripheral edge of the on-off valve in the closed position and an inner surface of the connecting cylinder are in close contact with each other. The connecting cylinder is provided with an inlet for introducing the compressed air into the communication passage when compressed air is blown against the on-off valve, and the inlet is provided above the on-off valve. The granular material supply apparatus according to claim 1, wherein: The granular material supply device according to claim 2, wherein when the on-off valve rotates from the open position to the closed position, the compressed air is blown against the on-off valve. The granular material supply apparatus according to any one of claims 1 to 3, wherein a seal member is provided between the on-off valve in the closed position and an inner surface of the connecting cylinder. The granular material supply apparatus as described in any one of Claims 1-4, the gas flow provision means which provides the gas flow for conveying the said granular material in the said transport channel, and the said granular material supply A processing unit for performing a predetermined process on the granular material disposed downstream of the apparatus and transported by the transport gas; and a storage unit for storing the granular material subjected to the predetermined process by the processing unit; A granular material transport system comprising:

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