JP2009091078A - Particulate feeding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a particulate feeding machine including an opening/closing valve with the function improved so as to enhance the feeding efficiency. <P>SOLUTION: The particulate feeding machine 1 is equipped with a rotary opening/closing valve 7 having a rotary shaft 70 arranged parallel with vane plates 50 of a rotary valve 5 and a valve plate 72 fixed to the rotary shaft 70 and arranged to make changing-over between the blocking position H to block the communication part 6 and the opening position K to open the communication part 6, and when the opening/closing valve 7 is in the opening position K, the top 73 of the valve plate 72 is fastened by a plate-shaped lower fastening part 40 of a bag filter 4 while the lower end portion 74 of the valve plate 72 is arranged in proximity so as not to interfere with the rotating locus T of the vane plate 50, and in the condition that the bottom 74 has partitioned the upper opening 9 of the rotary valve 5 into to regions as a cast-in side opening 53 and an eject side opening 54, the particulate fed into a hopper 3 from a reception part 2 is put in from the cast-in side opening 53 of the rotary valve 5, while the mixture gas from the eject side opening 54 is subjected to a suction treatment of the bag filter 4 so as to separate the mixture into the powder and air, the latter to be released outside. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air transport plant for various granular materials such as foods, pharmaceuticals, chemicals, feeds, fertilizers, etc., which opens and closes passages such as raw material tanks, silos and hoppers to control the supply of granular materials. It is related with a granular material supply machine provided with a valve.

  Patent Document 1 discloses an invention of a granular material supply device and a granular material transportation system that can suppress a decrease in the transportation efficiency of granular materials. The invention described in Patent Document 1 includes a supply device 17 for supplying powder particles to a transport passage. A hopper 22 is fixed to an upper end portion of a rotary feeder 23 via a connecting cylinder 24 and is put into the hopper 22. The granular material thus supplied is supplied into the transport passage through the connecting cylinder 24 and the rotary feeder 23, and the connecting cylinder 24 has a closed position where the connecting cylinder 24 is closed and an open position where the connecting cylinder 24 is opened. A rotating plate 53 that is rotatably supported via a rotating shaft 52 is provided, and a seal ring 55 is interposed between the peripheral edge of the rotating plate 53 in the closed position and the opposing surface thereof, and is in the closed position. A space between a peripheral edge of a certain rotation plate 53 and its opposing surface is sealed in the circumferential direction.

JP 2006-240764 A

  However, since the rotation shaft 70 of the opening / closing plate 53 is disposed at the center position of the connecting cylinder 24, when the opening / closing valve 53 is in the horizontal closed position, the sealing performance is improved and the transportation efficiency is increased. When the rotary feeder 23 is driven when 53 becomes a vertical open position, the powder particles supplied and the return by the blades that are emptied by discharging the powder particles at the top of the hopper 22 and the rotary feeder 23 The air collided, and the supply efficiency of the granular material became insufficient.

  An object of this invention is to raise supply efficiency by improving the function of the on-off valve of a granular material supply apparatus in view of the said subject.

  In order to solve the above-mentioned problems, the present invention is an invention as described in claim 1. In the present invention, when the rotary on-off valve is in the open position, the upper end of the valve plate is locked at the lower part of the solid-gas separation device so that the lower end of the valve plate does not interfere with the rotation trajectory of the vane plate. The lower end portion divides the upper opening of the rotary valve into two regions, a charging side opening and a discharging side opening, and the granular material supplied from the receiving portion of the hopper is the rotary member. The solid gas separation device processes the air-fuel mixture from the discharge side opening and releases the gas to the outside.

  It is preferable that the rotary on-off valve includes a valve plate obtained by machining a steel plate and an annular portion, and the thickness is set larger than the thickness of the hopper wall.

  Moreover, it is preferable that the said annular part is provided with the laminated structure which fastened the several steel plate, and performs the seal | sticker by a metal contact between a steel plate and the said valve plate.

  A structure that achieves the effect of material sealing that the granular material itself acts as a seal is also possible, and a simple sealing structure can improve the sealing performance.

According to the first aspect of the invention, the following effects can be obtained.
That is, in a state where the rotary on-off valve is raised, the granular material supplied from the receiving portion of the hopper is introduced into the inlet side opening of the rotary valve, while the air-fuel mixture from the outlet side opening is mixed with the solid gas. Since the gas is released to the outside after being processed by the separation device, it is possible to prevent the gas mixture and the gas from colliding with each other, to smoothly supply the granular material to the rotary valve, and to perform a suitable air escape. it can. Of course, when the valve plate is closed, by ensuring confidentiality, air leakage into the hopper can be prevented and transportation efficiency can be improved. As a result, the function of the valve plate of the granular material supply device, which conventionally functioned only when closed, has been changed to a dual function that functions both when closed and opened. The efficiency of the rotary valve can be increased.

  The granular material supply machine 1 of this embodiment is demonstrated with reference to drawings. 1 to 4 schematically show the entire configuration of the powder and particle feeder 1, and are installed in a supply unit of a powder and particle transport system that transports the powder by mixing it with a transport gas. It is. The powder and particle feeder 1 includes a hopper 3 having a receiving portion 2 into which powder particles are charged, a bag filter 4 that is an example of a solid-gas separation device provided on the top of the hopper 3, and the hopper 3 and the bag filter 4. A rotary valve 5 provided with a rotor 52 provided with a plurality of blades 50 to partition a plurality of troughs 51 in the rotational direction, and a communication portion 6 communicating the rotary valve 5 and the inside of the hopper 3. I have.

  As shown in FIGS. 5 and 6, the powder and particle feeder 1 is a rotary shaft 70 disposed in parallel with the blade 50 of the rotary valve 5, and is closed to the communication shaft 6 while being fixed to the rotary shaft 70. A rotary on-off valve 7 having a position H and an open position K for opening the communicating portion 6 and a valve plate 72 that is switched between two positions is provided. As shown in FIG. 5, the powder is stored in the hopper 3 when the rotary on-off valve 7 is closed, and as shown in FIG. 6, the powder supplied to the hopper 3 when the rotary on-off valve 7 is opened. Granules are discharged downstream by the rotary valve 5. The rotary on-off valve 7 is driven by a driving device 8.

As shown in FIG. 6, in the powder supply unit 1, the rotary on-off valve 7 is locked at the open position K with the upper end portion 73 of the valve plate 72 by the plate-like lower locking portion 40 of the bag filter 4. By arranging the lower end 74 of the valve plate 72 in the vicinity so as not to interfere with the rotation trajectory T of the blade plate 50, the inside of the hopper 3 is divided into two chambers R ₁ and R ₂ . Further, in a state where the lower end 74 partitions the upper opening 9 of the rotary valve 5 into two regions of the input side opening 53 and the discharge side opening 54, the granular material supplied from the receiving part 2 into the hopper 3 is indicated by an arrow. As shown, the bag filter 4 sucks the air-fuel mixture that is introduced from the inlet side opening 53 of the rotary valve 5 and transferred from the lower opening 10 to the outlet side opening 54 as shown by the arrow, and then separated into powder and air. Thus, the air is allowed to escape to the outside.

  As shown in FIGS. 1 to 3, the pneumatic transport adapter 11 is connected to the lower part of the rotary valve 5, and the lower opening 10 of the rotary valve 5 communicates with the internal space of the pneumatic transport adapter 11. For details, refer to JP-A-2002-249223, JP-A-2001-62225, JP-A-2003-26327, and the like. Moreover, as shown in FIG. 3, the control part 12 which controls the bag filter 4, the rotary valve 5, the rotary on-off valve 7, and the pneumatic transport adapter 11 is provided.

  The detection unit 13 shown in FIG. 1 is disposed on the wall surface of the hopper 3 and is used to measure the amount of powder particles supplied to the rotary valve 5. Based on the detection signal from the detection unit 13, the control unit 12 commands the operation of the driving device 8, and the valve plate 72 is reciprocally rotated by the command.

  As an example of an air transportation system to which the present embodiment is applied, a plurality of powder and particle feeders 1 are each connected to a corresponding upstream silo via a screw feeder or the like and supplied from each silo. A plurality of types of granular materials are weighed by a plurality of granular material supply machines 1, the plurality of granular material supply machines 1 are connected in series with a common transport pipe, and the transport pipe is connected to a blower upstream. The powder is transported to the downstream side while selecting one of the powder feeders 1 through this transport pipe by the power of the blower, and finally packed or mixed by the filling machine. Although what is processed is mentioned, an application example is not necessarily limited to this. Hereinafter, the detailed structure of this embodiment will be described.

  As shown in FIG. 1 to FIG. 4, a receiving portion 2 that receives powder supplied from upstream is formed on the upper portion of a hopper 3 that has a funnel shape. As shown in FIGS. 5 and 6, a communication portion 6 is formed in the lower portion of the hopper 3, and the communication portion 6 communicates with the upper opening 9 of the rotary valve 5.

  As shown in FIGS. 5, 6, and 7, the bag filter 4 includes a lower locking plate 40 that extends downward from the lower portion thereof. 1 to 4, the inner space of the housing 41 is partitioned into a clean air side space S and a powdered air side space F (see FIG. 2), and a cell plate 43 (bag) having a plurality of vent holes 42 is provided. A filter support plate), a filter cloth 44, and a retainer (not shown) inserted into the vent hole 42 from the clean air side space S; and the retainer (not shown) is mounted from the clean air side space S. An air guide 45 and an air guide pressing member 46 that presses the air guide 45 from the clean air-side space S and has an air blowing function and is detachably attached to the cell plate 43 are provided. A retainer (not shown) to which the filter cloth 44 is attached is well-known and will not be described.

  The solenoid valve unit 47 is partitioned from the clean air side space S on the inner wall, supplies backwash air into the filter cloth 44, and stops backwash air when the control signal is turned off. Here, the jetting mode of the backwash air is a pulse jet type.

  Further, the bag filter 4 includes a suction fan 48 fixed to the upper part of the main body for collecting air by sucking air from the clean air side space S, and a manometer that functions as a differential pressure gauge by detecting the pressure in the clean air side space S. 49. The housing 41 is disposed in a substantially half region at the top of the hopper 3. As shown in FIG. 4, a housing 41 is adjacent to the receiving portion 2.

  As shown in FIGS. 1 to 5, the rotary valve 5 includes a cylindrical casing main body 55 and a pair of side plates 56 formed into a plate shape that is welded and fixed to both left and right ends of the casing main body 55. The casing body 55 has a perfect circle on the inner peripheral surface, and the casing body 55 and both side plates 56 constitute an outer shell.

  A rotating shaft 58 connected to a motor 57 is rotatably supported at the approximate center of the casing body 55. The rotating shaft 58 is provided with a rotor 52 that is disposed in the casing main body 55 and that transports powder particles. The rotor 52 receives the rotational power of the motor 57 transmitted from the rotary shaft 58, rotates in a predetermined direction (arrow A direction (counterclockwise direction) shown in FIG. 6) at a predetermined rotation number, and is supplied from above. The granular material is transferred downward.

  On the outer peripheral surface of the rotor 52, a blade plate 50 having a substantially plate-like cross section extending along the axial direction of the rotary shaft 58 is attached in the circumferential direction. A plurality of blades 50 are attached at a predetermined equal pitch.

  The tip of the blade plate 50 is provided with a clearance from the facing surface (the inner surface of the casing body 55) facing the tip. The rotary valve 5 is also called an air lock and has a function of locking air. However, even when the rotary valve 5 is stopped and the on-off valve 7 is closed, powder and air may leak upward from below. A plurality of troughs 51 are defined on the outer peripheral surface of the rotor 52 in the rotational direction (circumferential direction) of the rotor 52 by blade blades 50 adjacent to each other along the circumferential direction.

  The casing body 55 and the side plate 56 define an upper opening 9 and a lower opening 10 as shown in FIG. A communication part 6 is formed on the upper side of the rotary valve 5, and the lower part is fixed to the upper part of the pneumatic transport adapter 11.

  As the rotor 52 rotates, each trough 51 that rotates and moves on a certain movement trajectory T (see FIG. 6) moves and moves through the input side opening 53 of the upper opening 9, and powder particles are accommodated therein. The transport gas is forced to flow into the air transport adapter 11 in order to be discharged to the downstream side in a state of being mixed with the transport gas, and then to the empty trough 51. Is placed in the casing main body 55 so as to be transferred upward in a state in which an air-fuel mixture containing powder particles is contained and processed by the bag filter 4.

  As shown in FIGS. 5 and 6, the communication part 6 is provided so as to communicate the inside of the rotary valve 5 and the inside of the hopper 3.

  As shown in FIGS. 5 and 6, the rotary on-off valve 7 has a rotating shaft 70 disposed at a position shifted from the substantially central portion of the valve plate 72, and supports the rotating shaft 70 so that a bearing 77 can rotate. (See FIG. 11). In the communication portion 6, a plate-like valve plate 72 as an on-off valve is fixed to the outer periphery of the rotary shaft 70. An opening position K at which the valve plate 72 communicates the upstream side and the downstream side of the communication unit 6 by the reciprocating rotation of the valve plate 72 around the rotation shaft 70 by the drive device 8 that operates according to a command from the control unit 12. (Refer to FIG. 6) and a closed position H (see FIG. 5) for blocking the upstream side and the downstream side of the communication portion 6 are switched and arranged. The control unit 12 commands the operation of the bag filter 4, the rotary valve 5, the driving device 8, and the air transport adapter 11 at a set predetermined time interval, and the supply timing of the granular material to the rotary valve 5 or the like by the command. Is decided. The predetermined time interval set in the control unit 12 is set in consideration of the properties of the powder and the processing ability of the rotary feeder.

  Since the communicating part 6 is closed by the valve plate 72 when the valve plate 72 is in the closed position H in FIG. 5, the supply of the granular material charged into the hopper 3 to the rotary valve 5 is restricted. On the other hand, when the valve plate 72 is at the open position K in FIG. 6, the communicating part 6 is opened, so that the granular material charged into the hopper 3 is supplied to the rotary valve 5 through the communicating part 6.

  At the periphery of the valve plate 72, a frame-shaped metal touch annular portion 76 in which steel plates as sealing members are laminated is provided. The metal touch annular portion 76 is provided in an annular shape so as to surround the periphery of the valve plate 72 and is in metal contact with the periphery of the valve plate 72 in the closed position H. The metal touch annular portion 76 seals the periphery of the valve plate 72 in the closed position H and the facing surface thereof in the circumferential direction.

  As shown in FIG. 8, the communication portion 6 is sealed by joining the outer peripheral end surface 78 of the valve plate 72 and the inner peripheral end surface 79 of the metal touch annular portion 76. The inner peripheral end surface 79 of the metal touch annular portion 76 is set to be inclined with respect to the outer peripheral end surface 78 of the valve plate 72, and when the valve plate 72 seals the communicating portion 6, the valve plate 72 is opposed to the inner peripheral end surface 79. The end portion 78a of the outer peripheral end surface 78 is in a continuous linear contact or is opposed by a minute gap so that a wedge-shaped gap δ is formed. As shown in FIG. 10, a U-shaped groove 72a is continuously provided on the outer peripheral end surface 78 of the valve plate 72 in a plan view of a plurality of strips parallel to the long side direction of the outer peripheral end surface 78. Is not provided.

  In this embodiment, the position of the rotary shaft 70 is set not at the center of the valve plate 72 but at a position shifted to the end. That is, the area ratio is set (70:30) so that the input side opening 53 is wider than the discharge side opening 54. Of course, conditions such as powder properties, such as granulated sugar, may have a specific gravity of 50:50 because of its high specific gravity and good fluidity. In addition, 60:40 may be used, and, in extreme cases, 90:10 may be used, and the ratio is not particularly limited.

As shown in FIG. 8, the end portion 78a of the outer peripheral end surface 78 that is an inclined surface is in contact with the inner peripheral end surface 79, and a wedge-shaped gap δ is formed in addition to the contact surface. This inclined surface is inclined so as to increase the width of the gap δ as it goes upward. That is, the gap gradually narrows from the end portion 78a of the outer peripheral end surface 78 to the end portion 78a until the end portion 78a contacts the inner peripheral end surface 79 until the end portion 78a contacts the inner peripheral end surface 79. It has become. This makes it less susceptible to manufacturing errors, improves sealing accuracy, and prevents air leakage. The inclination angle of the gap δ (angle formed by the opposing end surfaces) is exemplified by 1 ° to 4 °, but is not limited. Here, as shown in FIG. 8, the maximum value of the gap δ is the gap δ ₁ . This gap δ ₁ has a different value depending on the inclination of the surface. When the rotary on-off valve 7 is closed, the outer peripheral end surface 78 and the inner peripheral end surface 79 may or may not be in contact with each other. For example, as shown in FIG. 9, when the granular material has a fine particle size, a gap δ ₂ that is the minimum value of the gap δ ₁ may be provided. The gap δ ₂ is formed at the lower end 78 a of the outer peripheral end surface 78 and the lower end of the inner peripheral end surface 79. The gap δ ₂ is not limited. For example, the gap δ ₂ is 0.1 mm to 0.01 mm, preferably 0.5 to 0.09 mm, and particularly preferably 0.05 to 0.08 mm. The numerical value of the gap δ ₂ is appropriately changed depending on the nature and type of the powder.

  As shown in FIG. 10, the valve plate 72 has a plurality of (here, two) grooves 72a on the outer peripheral end surface 78 continuously (or discontinuously) on four sides in the long side direction (longitudinal direction) of the end surface. It is formed. The groove 72a may use the granular material as a seal instead of or together with the labyrinth seal. That is, the material seal M (see FIG. 9) may be used, and the sealing performance is enhanced after simplifying the sealing structure. When the valve plate 72 is closed, the granular material is reliably guided by the action of the groove 72a by guiding the granular material into a wedge-shaped gap δ formed over three sides between the outer peripheral end surface 78 and the inner peripheral end surface 79. And the granular material itself filled in the gap δ functions as a seal. Further, the valve plate 72 has a main surface 72b on the front and back sides, and as shown in FIG. 8, the angle between the front side (upper side) main surface 72b and the outer peripheral end surface 78 is an obtuse angle when viewed from the front. The angle formed by the (lower) main surface 72b and the outer peripheral end surface 78 is set to an acute angle. Either side of the outer peripheral end surface 78 and the inner peripheral end surface 79 may be an inclined surface depending on the application of the granular material supply machine 1 or the like. When the outer peripheral end face 78 is inclined, as shown in FIG. 8, the lower angle becomes an acute angle and the upper angle becomes an obtuse angle.

  As shown in FIG. 8, the metal touch annular portion 76 has a multilayer structure in which a plurality of steel plates are fastened. When the rotary shaft 70 rotates the valve plate 72 and the valve plate 72 becomes horizontal (valve plate 72 is closed), a rectangular frame-shaped seal metal 76a with which the end portion 78a of the outer peripheral end surface 78 of the valve plate 72 contacts, a rectangular frame-shaped connection flange 76b fixed to the upper portion of the seal metal 76a, and a seal A rectangular frame-shaped shim 76c fixed to the lower part of the metal 76a. The reason why the laminated structure is formed in this way is to adjust the manufacturing error by shifting the position of the seal metal 76a. Loosen the bolts slightly, align the holes properly, and then tighten with the bolts to improve seal processing accuracy (and adjustment accuracy) and prevent air leaks.

  The valve plate 72 and the metal touch annular portion 76 are obtained by machining a steel plate, for example, machining a SS400 (flat bar), which is a general structural rolled steel material, with a machine tool, and the surface is unichrome plated or nickel. Chrome plating finish. The thickness is set larger than the thickness of the wall of the communication part 6.

In the state where the valve plate 72 stands up, there is no problem although the end portions on both sides of the valve plate 72 have a slight gap with the inner wall of the hopper 3. In order to eliminate such a gap, the opposing inner wall of the hopper 3 may be an upright wall, and the other surface may be an inclined wall.
Further, as shown in FIG. 7A, the lower locking plate 40 may have a bent portion, and as shown in FIG. 7B, a lower locking plate 40 and an additional plate 40a may be provided.

  The drive device 8 includes a safety cover 83 that covers the swing arm 80 and the knuckle 81 as shown in FIGS. 11 and 12. The rotary shaft 70 is pivotally attached to one end so that the end of the swing arm 80 is orthogonal. The swing arm 80 is an arm member whose end is fixedly attached to the rotary shaft 70, and swings integrally with the rotary shaft 70 and the valve plate 72. The swing arm 80 has a knuckle 81 coupled to the other end, and the knuckle 81 is fixed to the piston rod 84 so that the swing arm 80 is swung. A bracket 85 supports the safety cover 83.

  The air cylinder 82 is disposed in the horizontal direction so as to integrally rotate the rotary shaft 70, the valve plate 72, and the swing arm 80. The air cylinder 82 includes a bracket 85 made of bolts, pins, and the like. The bracket 85 is supported by a support rod 86, and the support rod 86 is fixed to the rotary valve 5 horizontally. Furthermore, a solenoid valve, a cylinder switch, etc. are provided.

  Next, the operation | movement which supplies a granular material using the granular material supply machine 1 comprised in this way is demonstrated. The granular material from the upstream is conveyed by a supply device (not shown) such as a screw conveyor and is put into the hopper 3 through the receiving portion 2. At this time, since the valve plate 72 is in the closed position H where the communication portion 6 is closed, the granular material charged into the hopper 3 is temporarily stored on the valve plate 72. The valve plate 72 is in a horizontal position and is in contact with the seal metal 76a. At this time, the material seal M of FIG. 9 may be formed. Although illustration is abbreviate | omitted here, the pneumatic transport adapter 11 is connected with the pneumatic transport adapter of another granular material supply machine which is the same structure as the supply blower and the granular material supply machine 1 with a conveyance pipe, and is a rotary type. Even while the on-off valve 7 is closed, the air from the supply blower or the particulate mixture from the other air transport adapter flows in the air transport adapter. However, since the rotary on-off valve 7 is closed, the rotary valve 5 flows backward from the pneumatic transport adapter 11 so that air does not blow up, and energy loss in pneumatic transportation can be prevented.

  Next, according to a command from the control unit 12, the valve plate 72 is rotated from the closed position H to the open position K by the drive device 8, and the communication unit 6 is opened. That is, when the piston rod 84 of the air cylinder 82 is extended, the knuckle 81 swings (rotates) the swing arm 80, whereby the valve plate 72 and the swing arm 80 rotate clockwise in FIG. It swings integrally with the shaft 70 as a central axis. If it does so, the valve plate 72 will rotate clockwise and will detach | leave from the seal metal 76a, the valve plate 72 will be in the inclination state near perpendicular | vertical, and a granular material will be discharged | emitted from the communicating part 6 below. And the granular material in the hopper 3 is thrown into the trough 51 that has reached the supply position via the inlet side opening 53, and the granular material is dropped downward from the trough 51 that has reached the discharge position of the lower opening 10, It is transferred to the pneumatic transport adapter 11.

  When the transport gas that has passed through the upstream transport pipe is pumped into the air transport adapter 11, the particulates are forcibly transported to the downstream transport pipe side by the transport gas. At this time, the valve plate of still another granular material feeder connected to the downstream transport pipe is in the closed position H, and the gap between the peripheral edge and the opposed surface is firmly sealed, so the downstream powder Air does not blow up in the granule feeder. For this reason, the high-pressure property of the transport gas pumped into the transport pipe is maintained, and the granular material can be transported efficiently by the high-pressure transport gas. The granular material transported to the downstream transport pipe side is supplied into a metering filling device (not shown).

  As shown in FIG. 6, the evacuated trough 51 rotates counterclockwise from the discharge position toward the discharge side opening 54, and the air-fuel mixture near the discharge side opening 54 is further transferred upward, It is sucked into the bag filter 4 to secure an air escape path. At this time, since the lower locking plate 40 is locked to the valve plate 72, there is an advantage that the granular material supplied from the receiving portion 3 into the hopper 3 and the air-fuel mixture entering the bag filter 4 do not interfere with each other.

  In the bag filter 4, the clean air is sucked by the suction fan 48 communicating with the outlet of the clean air side space S, and the air is released when the powder particles are put into the hopper 3. During the powder collection operation, air from the powdered air side space F is sucked into the clean air side space S. Most of the powder is adsorbed on the filter cloth 44. At that time, the shape of the filter cloth 44 is stretched over a retainer (not shown) to form a concave state. On the other hand, as needed, pulse jet backwash air with momentary pressure is jetted from the air guide holding member 46 toward the retainer (not shown), and the filter cloth 44 instantaneously expands into a substantially elliptical shape. The backwashing air propagates through the filter cloth 44 in a wave-like or pulsating manner, and the backwashing operation is performed in which the collected powder particles are removed from the filter cloth 44 by vibration due to impact. The powder collection efficiency can be maintained because it is housed in the container and transferred to the input side opening 53.

  After that, when the detection unit 13 detects that a predetermined amount of the granular material has been introduced to the rotary valve 5 side, the control unit 12 rotates the valve plate 72 from the open position K to the closed position H, thereby communicating the communication unit. The drive device 8 is controlled so that 6 is closed. That is, the piston rod 84 of the air cylinder 82 is retracted, and the knuckle 81 swings (rotates) the swing arm 80, whereby the valve plate 72 and the swing arm 80 are centered on the rotation shaft 70 in the counterclockwise direction. It swings as a shaft. The valve plate 72 is set in a horizontal position, comes into contact with the seal metal 76a, the discharge operation is stopped, and the granular material returns to the storage state. Further, the granular material adhering to the valve plate 72 is wiped off by the rotation of the valve plate 72 and put into the trough 51. However, depending on the type of the granular material, it may continue to adhere to the valve plate 72, and the valve plate 72 may reach the closed position H as it is.

The effect of this embodiment will be described.
(1) In a state where the valve plate 72 is upright, the granular material supplied from the receiving portion 2 of the hopper 3 is introduced into the inlet side opening 53 of the rotary valve 5, while the air-fuel mixture from the outlet side opening 54 is solidified. Since the gas is released to the outside after being processed by the bag filter 4 as the gas separation device, it is possible to prevent the air-fuel mixture and the gas from interfering with each other, and to smoothly supply the granular material to the rotary valve 5. Air escape can be performed. Of course, when the valve plate 72 is closed, by ensuring confidentiality, air leakage into the hopper 3 can be prevented, and the transportation efficiency can be enhanced by the energy saving effect. Thereby, the function of the rotary on-off valve 7 of the granular material supply machine 1 can be improved, and the supply efficiency of the rotary valve 5 can be increased. Furthermore, when transporting a plurality of types of granular materials, mixing of the granular materials can be prevented, and accurate processing can be achieved.
(2) Since the seal is configured by metal touch using the metal touch annular portion 76 and the valve plate 72, the structure can be simplified, and the seal peeling piece can be prevented from being mixed into the powder, mold, pest, etc. The foreign matter is hardly generated and contamination can be suitably prevented.
(3) Since the valve plate 72 is in linear contact with the metal touch annular portion 76, it is possible to prevent the powder particles from being bitten, to ensure the seal, and to improve the accuracy of air leak prevention.
(4) Since the metal touch annular portion 76 is composed of three parts, stable manufacturing accuracy of the seal can be realized by manufacturing the metal touch annular portion 76 as a separate body with high accuracy.
(5) When the granular material is sealed by the valve plate 72 and the seal metal 76a by the action of the groove 72a, the granular material itself is sealed by filling the gap δ and the groove 72a. Since the effect of configuring the material seal M to act can be obtained, the sealing performance can be improved by a simple seal structure.

  The present invention is not limited to the above-described embodiment, and modifications and the like can be made without departing from the technical idea of the present invention. It will be included in the technical scope of the invention.

  For example, the present embodiment can be modified and embodied as follows. In the present embodiment, a transport system for transporting the granular material is adopted as a granular material for foods, drugs, and chemicals. However, the granular material is not limited to this. For example, you may employ | adopt the transport system which transports pulverized bodies, such as a fragment of glass, a plastics, and a board | plate material, sawdust, the finely crushed vinyl, etc., granular materials, such as cement and wood powder. A transportation system including a suction blower may be employed instead of the supply blower.

It is a front view of the granular material supply machine of this invention embodiment. It is a right view of the same granular material supply machine. It is a left view of the same granular material supply machine. It is a top view of the same granular material supply machine. It is a longitudinal cross-sectional view which shows the internal structure (closed position H) of the granular material supply machine. It is a longitudinal cross-sectional view which shows the internal structure (open position K) of the same granular material supply machine. It is the elements on larger scale of the latching structure of the internal structure (open position K) of the granular material supply machine. It is a partial expanded sectional view which shows the state of contact with the metal touch annular part and valve plate of the granular material supply machine. It is a partial expanded sectional view which shows the material seal of the metal touch annular part and valve plate of the granular material supply machine. (A) is the top view which shows the valve plate and rotating shaft of the granular material supply machine, (b) is the same side view, (c) is the same front view, (d) is the partial expansion of the edge part of (c). FIG. It is a top view of the rotary on-off valve of the same granular material supply machine, and its drive device. It is a front view of the rotary on-off valve and its driving device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Granule supply machine 2 ... Receiving part 3 ... Hopper 4 ... Bag filter 40 ... Lower locking plate 40a ... Additional plate 41 ... Housing S ... Clean Air-side space F ... Powder-containing air-side space 42 ... Vent hole 43 ... Cell plate 44 ... Filter cloth 45 ... Air guide 46 ... Air guide holding member 47 ... Solenoid valve unit 48 ... suction fan 49 ... manometer 5 ... rotary valve 50 ... vane plate 51 ... trough 52 ... rotor 53 ... input side opening 54 ... discharge side Opening 55 ... Casing body 56 ... Side plate 57 ... Motor 58 ... Rotating shaft T ... Rotation locus 6 ... Communication part 7 ... Rotary on-off valve H ... Closed position K ... Open position 70 ... Rotary shaft 72 ... Valve plate 72a · Groove 72b ... principal surface 73 ... upper portion 74 ... lower portion R _1, R ₂ ... chamber 76 ... metal touch annular portion 76a ... sealing metal 76 b ... connection flange 76c ... Shim 77 ... Bearing part 78 ... Outer peripheral end face 78a ... End part 79 ... Inner peripheral end face 8 ... Drive device 9 ... Upper opening 10 ... Lower opening 11 ...・ Pneumatic transport adapter 12 ... Control unit 13 ... Detection unit

Claims (1)

A hopper provided with a receiving part into which the granular material is charged;
A solid-gas separator provided at the top of the hopper to separate the granular material and the gas;
A rotary valve provided below the hopper and the solid-gas separation device, and provided with a rotor that forms a plurality of troughs in a rotational direction by a plurality of blades;
A communication portion for communicating the inside of the rotary valve and the inside of the hopper;
A rotary shaft arranged in parallel with the blades of the rotary valve, a switching position fixed between the rotary shaft and a closed position for closing the communication portion and an open position for opening the communication portion. A rotary on-off valve provided with a valve plate,
When the rotary on-off valve is in the open position, the upper end portion of the valve plate is locked at the lower portion of the solid-gas separation device, and the lower end portion of the valve plate is close so as not to interfere with the rotation trajectory of the blade plate. By being disposed, the lower end portion divides the upper opening of the rotary valve into two regions, a charging side opening and a discharging side opening,
The granular material supplied from the receiving part of the hopper is introduced into the inlet side opening of the rotary valve, and on the other hand, the air-fuel mixture from the outlet side opening is processed by the solid-gas separation device to release the gas to the outside. A granular material feeder.

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