JP4565949B2 - Powder and particle conveyor - Google Patents

Description

  The present invention relates to an improvement of a granular material conveying apparatus for conveying a granular material in a conveying source container to a conveying destination container installed at a position away from the conveying source container.

  Conventionally, in a case where the granular material in the transportation source container is transported to a transportation destination container installed in a place away from the transportation source container, for example, the granular material is inserted into the transportation source container. Suction nozzle for sucking, suction force generating means for generating a suction force for sucking and conveying the powder, and powder contained in air sucked from the suction nozzle side to the suction force generating means side The granular material is transported using a granular material conveying device that includes a collecting means provided with a filter for collecting the powder.

  In the granular material conveying apparatus having the above-described configuration, the collection unit includes a dropping unit for dropping off the granular material adhering to the filter. As the dropping unit, for example, an opening of a filter A configuration is disclosed in which compressed air is ejected intermittently (in a pulse form) from a nozzle disposed in a state of facing a portion (see, for example, Patent Document 1). Further, as the suction nozzle, for example, the suction nozzle is compressed toward the suction port and the vicinity of the suction nozzle in order to prevent the smooth conveyance of the powder by obstructing the suction nozzle by the powder. What was comprised so that air may be injected is disclosed (for example, refer patent document 2).

JP-A-9-85031 JP-A-8-91564

  However, in order to generate the compressed air when the compressed air is used in order to remove the granular material adhering to the filter of the collecting means as described above or to prevent the suction nozzle from being blocked by the granular material. Therefore, it has been difficult to use the granular material conveying apparatus having the above configuration in a place where the compressor is not installed. In addition, it is conceivable to provide a compressor in the granular material conveying device itself, but in this case, there is a problem that the manufacturing cost of the device increases. In addition, when a compressor is used to generate compressed air as described above, there is a problem that energy consumption increases.

  In view of the above-described various problems, the present invention can remove powder particles adhering to a filter or prevent the suction nozzle from being blocked by the powder particles without using compressed air. It aims at providing a granular material conveyance apparatus.

In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a blower suction force generating means for generating a suction force for sucking and transporting the granular material, and air sucked to the suction force generating means side. A collecting means provided with a filter for collecting the granular material contained therein, and a pressurization disposed between the suction force generating means and the collecting means and discharged from the suction force generating means the flow path of the state of the air, the direction for discharging the air to the outside, or provided with a flow path switching valve for switching appropriately the direction supplied to the collecting means side, the flow path switching valve is attracted to the outer peripheral surface An air outflow portion and an air inflow portion to which the suction side and the discharge side of the force generation means are connected, respectively, and an air inlet / outlet portion connected to the collection means, and an air discharge portion at both ends in the length direction, and A hollow cylindrical cylinder communicating with the outside via an air suction portion, and a front A sliding rod pivotally supported so as to be slidable along the length direction of the cylinder, and a first and a second that are attached with a predetermined interval in the length direction of the sliding rod and define the inside of the cylinder And a first stopper for receiving the first valve body on the air suction portion side and a second stopper for receiving the second valve body on the air discharge portion side. And

  According to a second aspect of the present invention, in the granular material conveyance device according to the first aspect, the granular material conveyance device further includes a suction nozzle having a double tube structure including an inner cylinder and an outer cylinder, and the suction force The pressurized air discharged from the generating means to the outside through the flow path switching valve is recirculated to a flow passage formed between the inner cylinder and the outer cylinder of the suction nozzle. And

  According to the first aspect of the present invention, the flow path switching valve for switching the flow path of the pressurized air discharged from the suction force generation means is disposed between the suction force generation means and the collection means. Therefore, by operating the flow path switching valve when necessary, the air flow path is switched, and compressed air discharged from the suction force generating means is circulated to the collecting means side, so that compressed air is not used. However, it is possible to smoothly and satisfactorily remove the granular material adhering to the filter provided on the collecting means side. As a result, since a compressor for generating compressed air is not required, it is possible to use the granular material conveying device even in a place where the compressor is not installed, and without using the compressor, Production costs can be reduced and energy consumption can be well controlled.

According to the first aspect of the present invention, the inside of the cylinder attached to the sliding rod is pushed or pulled by the sliding rod pivotally supported so as to be slidable along the length direction of the cylinder. Since the flow path of the pressurized air discharged from the suction force generating means is switched by linearly moving the partitioning first and second valve bodies to a predetermined position, the flow path switching valve is an electric actuator. Even without using a drive source such as a cylinder or a cylinder, it can be operated easily by hand, which is very convenient. In addition, the movement of the first and second valve bodies is restricted when the first valve body comes into contact with the first stopper, or when the second valve body comes into contact with the second stopper. Since it is positioned at the predetermined air flow path switching position, it is not necessary to control the position of the first and second valve bodies using a sensor or the like when switching the air flow path. Therefore, there is also an advantage that the flow path switching valve can be configured simply.

According to the second aspect of the present invention, the pressurized air discharged to the outside from the suction force generating means via the flow path switching valve is distributed between the inner cylinder and the outer cylinder of the suction nozzle. Since it is made to recirculate to the passage, the pressurized air that recirculates to the flow passage flows through the flow passage toward the front end side of the inner cylinder, and is present in the vicinity of the front end side of the inner cylinder. As a result, by sucking the fluidized granular material from the inner cylinder, it is possible to reliably prevent the inner cylinder from being blocked by the granular material. . In addition, even if the transport source container is a bag-like one, it is possible to prevent the bag-shaped transport source container from adsorbing to the suction nozzle by the air recirculated to the suction nozzle. It is possible to suck smoothly and satisfactorily even if the remaining powder in the container is reduced.

  The best mode for carrying out the present invention will be described below with reference to FIGS. FIG. 1 is a schematic configuration diagram illustrating an example of a case where a granular material is conveyed from a conveyance source container to a rotating drum mounted on a mixing device which is a conveyance destination container using the granular material conveyance device of the present invention. . In FIG. 1, reference numeral 1 denotes a mixing device provided with a rotation / oscillation mechanism, and 2 denotes a hollow rotary drum serving as a transfer destination container for the granular material P, which is placed on the mixing device 1 so as to be rotatable / oscillating. It is listed. 3 is a charging lid that is airtightly attached to the opening (right side in FIG. 1) of the rotating drum 2, and the charging lid 3 includes a charging tube 4 for powder P and an air suction tube 5. The rotary drum 2 is provided in communication with the inside and outside. A filter 6 for collecting powder particles up to a predetermined particle size is attached to the open end of the suction pipe 5 located in the rotary drum 2. The charging lid 3 is used only when the granular material P is transported. When the granular material P is mixed, a blind lid that does not have the charging tube 4 and the suction tube 5 is used instead of the charging lid 3. Is airtightly attached to the opening of the rotary drum 2.

  Next, 10 is the granular material conveying device of the present invention, and the granular material conveying device 10 includes a suction force generating means 11 such as a blower for generating a suction force for sucking and conveying the granular material P; A collecting means 12 for collecting fine particles having a predetermined particle size or less contained in the air sucked to the suction force generating means 11 side, and the suction force generating means 11 and the collecting means 12 A flow path that is disposed between and appropriately switches the flow path of the pressurized air that is discharged from the suction force generation means 11 to the direction in which the air is discharged to the outside or the direction in which the air flows into the collection means 12 side. The switching valve 17 and the suction nozzle 23 that sucks the powder P in the transfer source container 7 by the suction force generated by the suction force generation means 11 are schematically configured. Hereinafter, the configuration of the collecting means 12, the flow path switching valve 17, and the suction nozzle 23 will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the collecting means 12 flows in from a hollow collecting container 13 having a funnel-like lower side, and an inlet 13a provided on the side surface of the collecting container 13, In addition, one or more filters 14 provided in the collection container 13 in order to collect minute powder particles contained in the air flowing out from the outlet 13b provided on the upper side of the collection container 13. And an open / close valve 15 that opens and closes a discharge port 13c provided in the lower portion of the collection container 13. The inflow port 13a is connected to the suction pipe 5 provided in the charging lid 3 of the rotary drum 2 through a flexible pipe 8a.

  Subsequently, as shown in FIGS. 3 and 4, the flow path switching valve 17 is provided with an air outflow portion 18a, an air inflow portion 18b, and an air inflow / outlet portion 18c at predetermined positions on the outer peripheral surface, and in the longitudinal direction. A hollow cylindrical cylinder 18 provided with an air discharge part 18d and an air suction part 18e at both ends, a slide rod 19 pivotally supported by the cylinder 18 along its length direction, and the slide The first and second valve bodies 20a and 20b, which are attached with a predetermined interval in the length direction of the moving rod 19 and partition the cylinder 18, and the first and second valve bodies 20a and 20b. And a sealing member 21 that hermetically seals between the outer peripheral surface of the first and second valve bodies 20a and 20b and the inner peripheral surface of the cylinder 18; The first stroke is formed integrally with the portion 18e and receives the first valve body 20a. And and a second stopper 22b for receiving par 22a and the air outlet 18d and the second valve element 20b are integrally formed is schematically configured.

  The air outflow portion 18a is a suction side of the suction force generating means 11, the air inflow portion 18b is a discharge side of the suction force generation means 11, and the air inlet / outlet portion 18c is an outlet 13b of the collection container 13. They are connected via flexible pipes 8b to 8d. The air discharge portion 18d is discharged from the discharge side of the suction force generating means 11, and discharges pressurized air flowing into the cylinder 18 through the air inflow portion 18b. The cylinder 18 communicates with the outside on one end side in the length direction (lower side in FIGS. 3 and 4). Further, the air suction portion 18e is disposed on the other end side in the longitudinal direction of the cylinder 18 (upper side in FIGS. 3 and 4) in order to suck air supplied to the collection container 13 into the cylinder 18. 18 communicates with the outside.

  And when conveying the granular material P, as shown in FIG. 3, while closing the air suction part 18e in the state which made the 1st valve body 20a contact | abut to the 1st stopper 22a, it is 2nd The air inlet / outlet portion 18c and the air outlet portion 18a communicate with each other through the space S1 in the cylinder 18 partitioned by the valve body 10b, and the air inlet portion 18b and the air outlet portion 18d communicate with each other through the space S2. In this state, the suction force generating means 11 is activated, and the air on the collecting means 12 side connected to the air inlet / outlet portion 18c via the pipe 8d is converted into the space S1 → air as shown by the solid line arrow in FIG. The suction force generating means 11 is sucked through the outflow portion 18a → the pipe 8b and discharged in a state of being pressurized to a predetermined pressure from the suction force generating means 11, and the pipe 8c → the air inflow portion 18b → the space S2 → the air discharge portion. By discharging to the outside through 18d, a suction force for transporting the granular material P is generated.

  When air is supplied to the collection container 13 side, as shown in FIG. 4, the air suction part 18e and the air outflow part are passed through the space S1 in the cylinder 18 defined by the first valve body 20a. 18a is connected to the air inflow portion 18b and the air inlet / outlet portion 18c through the space S2, and the air discharge portion 18d is closed in a state where the second valve body 20b is in contact with the second stopper 22b. To do. In this state, the suction force generating means 11 is activated, and the air from the air suction portion 18e communicating with the inside of the cylinder 18 and the outside, as shown by a solid line arrow in FIG. 4, is the space S1 → the air outflow portion 18a → the piping 8b. Then, the suction force is generated by the suction force generation means 11 and discharged from the suction force generation means 11 under a predetermined pressure, and the pipe 8c → the air inflow portion 18b → the space S2 → the air inlet / outlet portion 18c → the pipe 8d. Supply to the collection container 13 side.

  Next, as shown in FIG. 5, the suction nozzle 23 has a double tube structure composed of a hollow cylindrical inner cylinder 24 and an outer cylinder 25, and the proximal end side of the inner cylinder 24 ( The upper side in FIG. 5 is connected to the input pipe 4 provided on the input lid 3 of the rotary drum 2 via a flexible pipe 8e. In addition, an intake adjustment valve 26 is provided on the proximal end side of the inner cylinder 24, and the intake adjustment valve 26 determines, for example, the degree of opening of the intake hole 24a perforated on the proximal end side of the inner cylinder 24. The amount of air sucked into the inner cylinder 24 is appropriately adjusted by adjusting according to the matching situation with the through hole 26a of the ring body 26b rotatably fitted to the outer periphery of the inner cylinder 24. Yes.

  On the other hand, on the base end side (upper side in FIG. 5) of the outer cylinder 25 through which the inner cylinder 24 is slidably inserted, the outside air is supplied to the flow passage 27 formed between the outer cylinder 25 and the inner cylinder 24. An intake pipe 28 for taking in secondary air, etc., is provided in a state where it can communicate with the flow passage 27, and on the tip side (the lower side in FIG. 5) of the outer cylinder 25, A plurality of suction holes 29 are formed so that the granular material P in the transfer source container 7 can be sucked into the inner cylinder 24 even when the tip side is in contact with the bottom surface of the transfer source container 7. Has been. Reference numeral 25 a denotes a collar through which the inner cylinder 24 is slidably inserted, and is fitted to the base end portion of the outer cylinder 25.

  As shown in FIG. 1, the intake pipe 28 is connected to the air discharge part 18d of the flow path switching valve 17 through a flexible pipe 8f as necessary, and the suction force generating means 11 The pressurized air discharged through the air discharge unit 18 d is returned to the flow passage 27 communicating with the intake pipe 28. In this case, an exhaust adjustment valve 30 (for example, the same as the intake adjustment valve 26 provided in the inner cylinder 24 of the suction nozzle 23) for adjusting the amount of air recirculated to the suction nozzle 23 can be switched, for example, It is good to provide in the site | part close to the air exhaust part 18d of the valve 17. This is because it is difficult to manufacture the exhaust regulating valve 30 in the middle of the pipe 8e, and when it is provided on the suction nozzle 23 side, pressurized air is blown out near the operator's hand. This is because it causes discomfort.

  As described above, when the air discharge portion 18d of the flow path switching valve 17 and the intake pipe 28 provided in the outer cylinder 25 of the suction nozzle 23 are connected, the air discharge portion 18d of the flow path switching valve 17 is provided. The pressurized air discharged from the air flows into the flow passage 27 through the pipe 8f → the intake pipe 28, and the base end portion of the outer cylinder 25 is closed by the collar 25a. Is distributed toward the distal end side (the lower side in FIG. 5) of the inner cylinder 24 and the outer cylinder 25, and the granular material P existing near the distal end side of the inner cylinder 24 is fluidized. On the other hand, the fluidized granular material P is sucked from the front end side of the inner cylinder 24 using the suction force generated by the suction force generation means 11 and is conveyed to the rotary drum 2 through the pipe 8e.

  Even when the intake pipe 28 and the air discharge portion 18d of the flow path switching valve 17 are not connected by the pipe 8f, the intake pipe 28 communicates the flow passage 27 and the outside air, so that suction force generating means is provided. When a suction force toward the rotary drum 2 is generated by activating 11, outside air is taken into the flow passage 27 from the intake pipe 28, and the granular material P existing near the tip side of the inner cylinder 24 by the outside air. Can be fluidized.

  Next, the operation of the granular material transport apparatus 10 according to the present invention will be described with reference to FIGS. 1 to 6. As shown in FIG. 1, when transporting the granular material P in the transport source container 7 to the rotary drum 2 mounted on the mixing device 1, first and second valve bodies in the flow path switching valve 17 in advance. As shown in FIG. 3, the air suction portion 18e is closed while the first valve body 20a is in contact with the first stopper 22a, and the positions of 20a and 20b are partitioned by the second valve body 20b. The air inlet / outlet portion 18c and the air outlet portion 18a are set at positions where the air inflow portion 18b and the air outlet portion 18d communicate with each other via the space S1 through the space S1 in the cylinder 18, respectively.

  Subsequently, the suction force generation means 11 is activated to generate a suction force directed to the suction force generation means 11 via the suction nozzle 23 → rotary drum 2 → collection means 12 → flow path switching valve 17, and the suction Due to the force, the granular material P in the transport source container 7 is transported to the rotary drum 2 through the suction nozzle 23 inserted in the transport source container 7 → the pipe 8e. The granular material P flowing into the rotating drum 2 together with the air from the charging pipe 4 provided on the charging lid 3 is separated from the air by its own weight as indicated by solid arrows in FIG. And the granular material up to a predetermined particle size contained in the air rotates as the air passes through the filter 6 provided in the suction pipe 5 as shown by the dotted arrow in FIG. When sucked out of the drum 2, it is collected by the filter 6. On the other hand, the air that passes through the filter 6 and is sucked from the rotary drum 2 flows into the collection container 13 of the collection means 12 through the pipe 8a. The air flowing into the collection container 13 includes fine powder particles having a predetermined particle diameter or less that are not collected by the filter 6 on the rotary drum 2 side. As indicated by a dotted arrow in 2 (a), when the air passes through the filter 14 provided in the collection container 13 and flows out of the collection container 13, it is collected by the filter 14 and is collected from the air. To be separated.

  Further, the air that has been collected and purified by passing through the filter 14 provided in the collection container 13 is purified by the collection container 13 as shown by solid arrows in FIG. The suction port 13b is sucked into the suction force generating means 11 through the pipe 8d, the air inlet / outlet portion 18c of the flow path switching valve 17, the space S1, the air outflow portion 18a, and the pipe 8b. It is discharged in a state of being pressurized and discharged to the outside through the pipe 8c → the air inflow portion 31b → the space S2 → the air discharge portion 31d.

  In addition, when the air discharge part 18d of the said flow path switching valve 17 is connected with the intake pipe 28 provided in the outer cylinder 25 of the suction nozzle 23 via the piping 8f, it discharges | emits from the said air discharge part 18d. The pressurized air is returned to the flow passage 27 formed between the inner cylinder 24 and the outer cylinder 25 of the suction nozzle 23 via the pipe 8 f → the intake pipe 28 and the base of the outer cylinder 25. Since the end portion is closed by the collar 25 a, the flow passage 27 flows toward the distal end side (the lower side in FIG. 5) of the inner cylinder 24 and the outer cylinder 25 and exists near the distal end side of the inner cylinder 24. The powder P to be fluidized is fluidized. In this way, by sucking the powder P in a state fluidized by the air recirculated to the flow passage 27 from the inner cylinder 24, the inner cylinder 24 is well prevented from being blocked by the powder P. Thus, the granular material P can be transported smoothly and satisfactorily.

  When the predetermined time has elapsed since the suction force generating means 11 is started (or when a predetermined amount of the powder P is transferred from the transfer source container 7 to the rotary drum 2), the suction force generating means 11 is stopped. Then, the conveyance work of the granular material P is completed.

  Next, when the filter 14 provided in the collection container 13 or the filter 6 provided in the charging lid 3 of the rotary drum 2 is clogged by the collected powder, the powder is filtered. The case of paying off 14 and 6 will be described. First, the first and second valve bodies 20a and 20b attached to the sliding rod 19 by pushing the sliding rod 19 of the flow path switching valve 17 are shown in FIG. 4 from the position shown in FIG. Thus, the second valve body 20b is moved to a position where it abuts on the second stopper 22b. As a result, the air suction portion 18e that has been closed by the contact of the first valve body 20a with the first stopper 22a until now has created the space S1 in the cylinder 18 partitioned by the first valve body 20a. The air inflow / outflow portion 18c communicating with the air outflow portion 18a is communicated with the air outflow portion 18a via the space S2 in the cylinder 18 defined by the first valve body 20a. It communicates with 18b. In addition, the air discharge portion 18d that has been in communication with the air inflow portion 18b so far is closed when the second valve body 20b comes into contact with the second stopper 22b.

  In this state, when the suction force generating means 11 is started, as shown by a solid line arrow in FIG. 4, the air flows from the air suction portion 18e that communicates the inside of the cylinder 18 and the outside to the space S1, the air outflow portion 18a, and the piping 8b. Through the suction force generation means 11 and discharged in a state of being pressurized to a predetermined pressure from the suction force generation means 11, and the pipe 8c → the air inflow portion 18b → the space S2 → the air inlet / outlet portion 18c → the pipe. After passing through 8d, it flows into the collection container 13 from the outlet 13b of the collection container 13. The pressurized air that has flowed into the collection container 13 flows further into the inside through the opening of the filter 14 provided in the collection container 13, as shown by the dotted arrow in FIG. And by passing the filter 14 from the inside to the outside, the fine powder particles adhering to the outside of the filter 14 can be removed well.

  The pressurized air that has passed through the filter 14 provided in the collection container 13 is slightly reduced in pressure, but from the inlet 13a of the collection container 13 through the pipe 8a → the suction pipe 5, and the rotary drum 2 Flows in. At this time, the air passes through the filter 6 provided at the opening end of the suction pipe 5 located in the rotary drum 2 from the inside to the outside as indicated by a dotted arrow in FIG. Since it flows in, the granular material to the predetermined particle size adhering to the outer side of the said filter 6 can also be removed favorably.

  Then, when a predetermined time has elapsed since the suction force generating means 11 is activated, the suction force generating means 11 is stopped, and the operation of removing the powder particles from the filters 14 and 6 is completed. Thereafter, the sliding rod 19 of the flow path switching valve 17 is pulled so that the first and second valve bodies 20a and 20b attached to the sliding rod 19 are shown in FIG. 3 from the position shown in FIG. In addition, the first valve body 20a is moved to a position where it abuts on the first stopper 22a (that is, returned to the original position) to prepare for the next transporting operation of the granular material P. In the state where the suction force generating means 11 is activated, the sliding rod 19 of the flow path switching valve 17 is repeatedly reciprocated to move the air flow path from the collection container 13 side to the suction force generating means 11 side. By switching intermittently between the direction of sucking air and the direction of supplying air from the suction force generating means 11 side to the collection container 13 side and applying pulsation to the filters 14 and 6, smoother and better It becomes possible to drop off the granular material.

  As described above, in the present invention, the flow path switching valve 17 is disposed between the collecting means 12 and the suction force generating means 11, and the flow path switching valve 17 is operated when necessary to generate the suction force. By switching the flow path of the pressurized air discharged from the means 11, the pressurized air discharged from the suction force generating means 11 is supplied to the collection container 13, and the collection container 13 It is possible to remove the powder particles from the filter 14 provided on the filter 14 and the filter 6 provided on the charging lid 3 of the rotary drum 2. As a result, the powder particles are removed from the filters 14 and 6 using compressed air. Since a separate compressor for generating the compressed air is not required as in the case of dropping, it is possible to use the granular material transport device 10 even in a place where the compressor is not installed, use It is possible to satisfactorily suppress an increase in energy consumption by Rukoto. In addition, by using a blower or the like as the suction force generating means 11, suction force can be generated without using compressed air. That is, the granular material transport apparatus 10 of the present invention does not require any compressed air. In addition, it is possible to perform the work of transporting the granular material P while saving energy.

  In addition, the air discharge part 18d of the flow path switching valve 17 and the intake pipe 28 provided in the outer cylinder 25 of the suction nozzle 23 are connected via a pipe 8f, and the pressurization discharged from the suction force generating means 11 By recirculating the air in the state to the suction nozzle 23, that is, by effectively using the pressurized air discharged from the suction force generating means 11, the inner cylinder of the suction nozzle 23 can be used without using compressed air. It is possible to suck the powder P present near the tip end side in a fluidized state, and as a result, it is possible to satisfactorily prevent the inner cylinder 24 of the suction nozzle 23 from being blocked by the powder P. it can. In addition, when the transport source container 7 containing the granular material P is, for example, in the shape of a bag, the suction force generating means 11 returns the suction of the transport source container 7 to the suction nozzle 23. Therefore, even when the remaining amount of the powder P in the transfer source container 7 is reduced, the powder P is smoothly sucked and transferred to the rotary drum 2. It is possible and convenient.

  Further, the slide rod 19 of the flow path switching valve 17 is pushed or pulled along the length direction of the cylinder 18 to partition the inside of the cylinder 18 attached to the slide rod 19. Since the second valve body 20a, 20b is linearly moved to a predetermined position, the flow path of the air flowing into the cylinder 18 from the suction force generating means 11 through the air inflow portion 18b is switched. The switching valve 17 is very convenient because it can be operated manually and without any special effort even without using a drive source such as an electric actuator or a cylinder. Moreover, the first and second valve bodies 20a and 20b are configured such that the first valve body 20a contacts the first stopper 22a, or the second valve body 20b contacts the second stopper 22b. Since the movement is restricted by contact and is positioned at a predetermined air flow path switching position, the position of the first and second valve bodies 20a and 20b is controlled using a sensor or the like when switching the air flow path. There is no need to do. Therefore, there is an advantage that the flow path switching valve 17 can be configured simply.

  In the embodiment of the present invention, the case where the powder P is directly sucked and transported from the transport source container 7 into the rotary drum 2 is described as an example, but the present invention is not limited to this. Various changes are possible, for example, as shown in FIG. 7, after separating the granular material P sucked and transported from the transport source container 7 to the collection container 13 from the air in the collection container 13, You may make it throw in in the rotating drum 2 via the flexible throwing chute | shoot 16. FIG.

  For example, as shown in FIGS. 8 and 9, the granular material P may be transported to a transport destination container 2 a other than the rotating drum 2. FIG. 8 shows the inlet lid 3 having the inlet tube 4 for the granular material P, the air suction tube 5 and the filter 6 for collecting the granular material up to a predetermined particle size at the opening of the transport destination container 2a. FIG. 9 shows an example in which the powder P is directly sucked and transported from the transport source container 7 to the transport destination container 2a in this state, and FIG. An example in which the granular material P sucked and transported to 13 is separated from the air in the collection container 13 and then opened into the open transport destination container 2a by opening the on-off valve 15 is shown.

  Further, as shown in FIG. 10, instead of sucking and transporting the powder P in the transport source container 7 using the suction nozzle 23, the powder P is rotated from the transport source container 7 composed of a hopper or the like. You may make it convey directly to the drum 2. FIG. As shown in FIG. 7, the powder P is put into the rotating drum 2 through the collecting means 12, or as shown in FIGS. 8 and 9, to the transport destination container 2 a other than the rotating drum 2. The same applies to the case where the granular material P is conveyed.

It is a schematic block diagram which shows an example in the case of conveying a granular material to the rotating drum mounted on the mixing apparatus using the granular material conveying apparatus of this invention. (A) is explanatory drawing which shows the flow of the air at the time of the granular material conveyance in a collection means, (b) is explanatory drawing which shows the flow of the air at the time of the granular material removal in a collection means. It is explanatory drawing which shows the state of the flow-path switching valve at the time of granular material conveyance. It is explanatory drawing which shows the state of the flow-path switching valve at the time of granular material dropping. It is a vertical front view which shows a suction nozzle. (A) is explanatory drawing which shows the flow of the air at the time of the granular material conveyance by the side of a rotating drum, (b) is explanatory drawing which shows the flow of the air at the time of the granular material removal at the side of a rotating drum. It is a schematic block diagram which shows the other example in the case of conveying a granular material to the rotating drum mounted on the mixing apparatus using the granular material conveying apparatus of this invention. It is a schematic block diagram which shows an example in the case of conveying a granular material to containers other than a rotating drum using the granular material conveyance apparatus of this invention. It is a schematic block diagram which shows the other example in the case of conveying a granular material to containers other than a rotating drum using the granular material conveyance apparatus of this invention. It is a schematic block diagram which shows an example in the case of conveying a granular material from the containers, such as a hopper, to the rotating drum mounted on the mixing apparatus using the granular material conveying apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Powder and particle conveying apparatus 11 Suction force generation means 12 Collection means 13 Collection container 14 Filter 17 Flow path switching valve 18 Cylinder 19 Sliding rod 20a, 20b Valve body 22a, 22b Stopper 23 Suction nozzle 24 Inner cylinder 25 Outer cylinder 27 Flow path 28 Intake pipe

Claims (2)

Blower suction force generating means for generating suction force for sucking and conveying powder particles, and a filter for collecting powder particles contained in the air sucked to the suction force generating means side are provided. A direction in which the air is discharged to the outside through a flow path of pressurized air that is disposed between the collecting means and the suction force generating means and the collecting means and is discharged from the suction force generating means. Or a flow path switching valve that switches appropriately in the direction of supply to the collecting means side, and the flow path switching valve has an air outflow in which the suction side and the discharge side of the suction force generating means are connected to the outer peripheral surface, respectively. A hollow cylindrical cylinder provided with a portion and an air inflow portion, and an air inlet / outlet portion connected to the collecting means, and communicated with the outside via an air discharge portion and an air suction portion at both ends in the length direction Slidably supported along the length direction of the cylinder. A rod, first and second valve bodies that are attached with a predetermined interval in the length direction of the sliding rod and define the inside of the cylinder, and the first valve body on the air suction side A granular material conveying apparatus comprising a first stopper for receiving and a second stopper for receiving the second valve body on the air discharge portion side .   The granular material conveying device further includes a suction nozzle having a double-pipe structure composed of an inner cylinder and an outer cylinder, and is in a pressurized state discharged from the suction force generating means to the outside via a flow path switching valve. 2. The granular material conveying apparatus according to claim 1, wherein the powder is returned to a flow passage formed between an inner cylinder and an outer cylinder of the suction nozzle.

Images